Sounding electrode assembly (versions) and underground reservoir fluid medium sampling method using sounding electrode assembly

FIELD: oil-and-gas industry.

SUBSTANCE: sounding electrode assembly execute fluid medium sampling from a borehole, going through underground reservoir with a fluid medium, located beyond a contaminated fluid medium layer, surrounding the borehole. The sounding electrode assembly contains a case, executed with ability to move forward from down hole equipment and a located in the case parker, with a distal surface for the full contact with the borehole section. The parker has internal and external peripheries, at that the external one limited with a channel, going through the parker. The parker additionally equipped with a channel (channels) executed in the distal surface and located with ability to limit a ring cleaning intake nozzle between the internal and the external peripheries. A bypass channel goes through the parker for natural fluid medium bypassing and/or the contaminated fluid medium between channels. In the parkers channel a sampling tube installed densely for the natural fluid medium bypassing to the second intake hole of the case and to equipment.

EFFECT: providing of required compacting with the reservoir, increase of clean fluid medium flow into the equipment, fluid medium flow into the instrument optimisation.

26 cl, 42 dwg

 

The present invention relates to a method of evaluating a subterranean formation using a site probe transported on a downhole tool located in a wellbore through a subterranean formation. More specifically, the present invention relates to a method of reducing the contamination of the formation fluid that is absorbed in the downhole tool and/or measured by the downhole tool through the site probe.

For localization and production of hydrocarbons drilling the well holes. For forming a wellbore passing through the target subterranean formation (or directed to this layer to pass through it), in the ground down the column of well pipes and tools with the drill bit is not the end, commonly called in the art "drillstring". Advancing the drill string down this drill column pumped drilling fluid emerging from the drill bit to cool it on the drill bit, remove drilling cuttings and pressure control in the well. Drilling fluid, passing from the drill bit and flows back up to the surface through the annular space formed between the drill string and the wall of the wellbore, and filtered in the well on the surface for recycling through the drill string. The drilling fluid and the use also for the formation of mud cake with the purpose of lining the wellbore.

It is often desirable to conduct various evaluations of formations through which the wellbore during drilling operations, for example, during periods when the drilling is actually suspended. In some cases, the drillstring may be equipped with one or more drilling tools for testing and/or sampling of the underground reservoir. In other cases, the drill string can be retrieved from the wellbore (this is called "flight"), and drop into the wellbore tool, the descent on the rope, testing and/or sampling of the reservoir. Such drilling tools and instruments that are lowered into the well on a rope and other tools for wellbore that can be transported by pipes, collapsed in the Bay, also referred to in the following text simply "downhole tools. The sampling or tests of such downhole tools can be used, for example, to localize significant hydrocarbons and managing their prey.

The evaluation of the reservoir often requires suction of fluid from the formation into the downhole tool for testing and/or sampling. From the downhole tool are different devices, such as probes and/or packers for sealing the wall of the wellbore and thereby establishing communication through the fluid from the reservoir is m, surrounding the wellbore. After this, the fluid can be sucked into the downhole tool via the transmitter and/or packer.

In a typical probe is used casing, which extends from the downhole tool and carries at its outer end packer intended for location in the side wall of the wellbore. The configuration of such packers in the typical case involves one relatively large item that can easily be deformed, coming into contact with a rough wall of the wellbore (in the case of the evaluation part of the wellbore is not fixed casing) while retaining sufficient strength and integrity to withstand the predicted pressure drops. These packers can be lowered into the wellbore on a variety of downhole tools.

Another device used for forming a seal with the side wall of the well bore, called the dual packer. When the double packer around the downhole tool in the radial direction are two elastomeric rings, isolating the prisoner between them a section of the wellbore. These rings form a seal with the wellbore and allow for the absorption of fluid into the downhole tool via the isolated section of the wellbore.

Created in the form of mud cake lining the trunk of the wells are often used to facilitate the probe and/or the packer in creating a proper seal with the wall of the wellbore. Immediately after creating a seal fluid from the reservoir is drawn into the downhole tool via the existing inlet at the expense of lowering the pressure in the downhole tool. Examples of probes and/or packers, used in downhole tools are described in U.S. patents№№6301959, 4860581, 4936139, 6585045, 6609568 and 6719049, as well as in the application No. 2004/0000433 patent of the United States.

Currently, there are ways for various measurements, pre-testing and/or sampling fluid that fall within the downhole tool. However, we discovered that when the produced fluid passes in the downhole tool, various pollutants, such as fluid environment of the wellbore and/or drilling mud, can get - and often are - in tool together with formation fluid environments. This problem is illustrated in figure 1, which depicts an underground reservoir 16, pierced by the shaft 14 of the well and containing natural the fluid 22. The layer of mud cake 15 stones side wall 17 of the barrel 14 hole. Because of the invasion of mud filtrate into the formation while drilling a wellbore surrounded by a cylindrical layer, which is called area 19 penetration of containing contaminated cucuy environment 20, which can be mixed or not mixed with the desired natural fluid medium 22 enclosed in a layer over the side wall of the wellbore and surrounding contaminated the fluid 20. As the contaminated fluid 20 tend to be about wall 17 of the wellbore in the zone 19 of penetration, it can have a negative impact on the quality of measurements and/or samples of formation fluid. In addition, contamination can cause costly delays in operations in the wellbore due to the need to expend additional time for more testing or sampling. In addition, such problems can lead to spurious results that are erroneous and/or useless.

On figa shows a typical flow conditions of formation fluid during their passage from the underground reservoir 16 in the downhole tool 1A transported on the rope. The downhole tool 1A have near the reservoir 16, and from this the downhole release tool probe 2A passing through the filtration cortex 15 and come into tight contact with the side wall 17 of the barrel 14 hole. Thus, the probe 2A is communicated through the fluid from the reservoir 16, as a result, it is possible the transmission of the reservoir fluid in the downhole tool 1A. First, as shown in figure 1, is it 19 penetration surrounds the side wall 17 and contains contaminated the fluid 20. As the differential pressure of the downhole tool 1A for suction of fluid from the reservoir 16 contaminated fluid 20 from the zone 19 of the first penetration absorbed (this particular point is not shown in figure 1 or 2A) in the probe, which gives the fluid unsuitable for sampling. However, after passing a certain amount of the fluid 20 through the probe 2A natural fluid 22 breaking through the zone 19 of penetration and starts to get into the downhole tool 1A through the probe 2A. More specifically, as shown in figa, the Central portion of the contaminated fluid 20 flowing from the zone 19 penetration probe, creates a path for natural fluid 22 and the remainder of the produced fluid is a contaminated fluid environment 20. The challenge is how to adapt to the flow of reservoir environments so that it was possible to reliably collect natural the fluid in the downhole tool 1A during sampling.

On figa shows a typical flow conditions of formation environments, when they pass from an underground reservoir 16 in the downhole tool 1b, conveyed on a drill string. The downhole tool 1b is transported among the one or more drilling tools downhole research while drilling (SIVB), logging while drilling (LWD) or other such in the of tools, well-known specialists in the field of technology (or itself may be such a tool). The downhole tool 1b uses the probe 2b for introduction into intimate contact with the reservoir 16 and suction the fluid out of it just as it happens in the case of the downhole tool 1A and probe 2A, described above.

Therefore, for accurate testing, it is desirable to allocate enough "pure" or "natural" fluid environment or to separate it from the contaminated fluid. In other words, the content of impurities in the produced fluid must be small, or they should not exist at all. Attempts were made to prevent contaminants from entering the downhole tool with produced fluid medium. For example, as shown in U.S. patent No. 4951749 have the filters in the probe to block contaminants from entering the downhole tool with produced fluid medium.

Other methods designed to prevent penetration of contaminants during sampling proposed in published application No. 2004/0000433 to the U.S. patent, the authors Hill and others, and in U.S. patent No. 6301959, the authors Hrametz and others figure 3 and 4 shows a schematic illustration of a solution that involves the use of a probe in accordance with the patent Hrametz. Hrametz describes the cushion 13 for sampling, mechanically pressed to steenkeste well. From the center of the pillow is the tube 18 of the probe, which is connected to a flow pipe 23a camera 27A for samples. The probe is surrounded by a protective ring 12 having apertures provided with its own flow pipe 23b and Luggage 27b for samples. This configuration is intended to create areas so that fluid flowing in the probe, essentially, does not contain contaminating the fluid to the wellbore.

Despite such achievements in the sampling fluid, there remains a need to reduce pollution in the evaluation of the reservoir. In some cases, cross-flow between adjacent flow tubes can cause contamination between them. It is desirable to develop ways to reduce contamination of the fluid entering the downhole tool and/or to isolate pure layered environment from contamination when clean fluid enters the downhole tool. It is also desirable to perform such a system ensuring the achievement - among others - one or more of the following purposes: to provide an acceptable seal with the reservoir; an increase in the flow of clean fluid in the tool; optimization of fluid flow in a downhole tool; pollution prevention clean fluid, when it reaches the downhole tool; the separation of a contaminated fluid from h the stand of the fluid; optimization of fluid flow in a downhole tool with a decrease in pollution clean the fluid flowing in the downhole tool; and/or flexibility when manipulating fluid-fluid flowing downhole tool.

Definition

Definitions of some terms used throughout this description is given when they are first used, and define some other terms used in this description are listed below.

The term "ring" ("ring", "ring") means something, forming a ring or relating thereto, i.e. pipe, bar, or design in the form of a closed curve such as a circle or an ellipse.

The term "contaminated fluid" means the fluid, which is generally unacceptable for sampling and/or evaluation of hydrocarbon fluid, because this fluid contains contaminants, such as mud filtrate used for drilling the wellbore.

The term "downhole tool" means instruments that are lowered into the wellbore using tools such as drill string, wire and pipe, roll in the Bay, for conducting well operations associated with evaluation, production and/or management development in one or more interested in underground formations.

The term "operatively with the United" ("operatively connected"means something directly or indirectly connected with the purpose of transmitting or transferring information, force, energy, or substances (including fluids).

The term "natural fluid" means the fluid, which is sufficiently pure, pristine, original, uncontaminated or another considered when collecting samples of fluid and the analysis of the field as an acceptable representative of a given layer to implement the selection of the reliable samples of hydrocarbons and/or reliable estimates.

Summary of the invention

At least, in one aspect, the present invention relates to a node of the probe intended for use with a downhole tool located in a wellbore surrounded by a layer of contaminated fluid. The wellbore passes through a subterranean formation having a natural fluid environment located outside a layer of contaminated fluid. Site probe includes a probe housing is made with the possibility of extension of the downhole tool. The probe housing is the packer, which has a distal surface adapted for introduction into intimate contact with the section of the wellbore. The packer has an external diameter and internal diameter (or the periphery), the inner diameter is limited by the channel passing through the packer. The packer is preferably ELA is tomerlin, for example of rubber, suitable for the conditions of the wellbore. Packer is also provided with one or more channels made in the distal surface and positioned with limiting ring cleanout standpipe between the inner and outer diameters. In the above-mentioned one or more channels are lots of spacers, which are operatively connected by limiting flexible spacer ring. Through the packer passes, at least one bypass channel for transmission of one of the natural fluid, contaminated fluid and combinations thereof between the said one or more channels and the first inlet in the probe housing. The first inlet in the probe housing is communicated through the fluid from the downhole tool. In the channel passing through the packer, is tightly fitted the sample tube for natural transmission of fluid to the second inlet hole in the probe housing. A second inlet in the probe housing is also communicated through the fluid from the downhole tool.

In a specific embodiment, the probe housing is made with the possibility of extension under the action of hydraulic pressure applied from the side of the downhole tool. The sample tube can also be made with the possibility of deducing the Oia of the probe housing under the action of hydraulic pressure, applied by the downhole tool.

The sample tube is preferably provided with a filter for filtering particles from a natural reservoir of the fluid flowing into the sample tube. In a preferred embodiment, the sample tube is also equipped with a piston, which is made with the possibility of extension of the probe housing for ejection of particles from the sample tube during extension of the piston relative to the sample tube. Such a piston may include, for example, made of the axial bypass channel and one or more perforations in its side wall for the natural transmission of the fluid admitted into the sample tube, in this axial bypass channel. Axial bypass channel is communicated through the fluid to the housing of the probe.

Spacers packer can be performed as a single unit with the packer, or, if they are sufficiently flexible spacers can be pressed into one or more channels of the packer. Accordingly, the packer may be provided with a continuous annular passage in the distal surface between the inner and outer diameters of the packer, or equipped with a variety of channels made in the distal surface and located with limiting ring cleanout standpipe between the inner and outer diameter and the AMI of the packer. In the latter case, the packer is equipped with a number of overflow channels, each of which passes through it to pass one of the natural fluid, contaminated fluid and combinations thereof between one of the channels and the first inlet in the probe housing.

In a specific embodiment, each of the bypass channels in the manifold coated tube, for example, for spreading the bypass channel under the action of compressive load on the packer. These tubes can be made as a single unit with a packer, for example, by pouring a packer around these tubes.

Ring clean intake is limited to one or more channels in the manifold, preferably is round. Desirable a certain relationship of the dimensions characterizing the ring clean intake. In particular, the internal diameter of the ring cleanout standpipe in the preferred embodiment, approximately 2-2 .5 times larger than the inner diameter of the sampling tube. In addition, the outer diameter of the ring cleanout standpipe in the preferred embodiment, approximately 2.5 to 3 times the inner diameter of the sampling tube. In addition, the outer diameter of the ring cleanout standpipe approximately 1.2 times larger than the inner diameter of the ring cleanout standpipe.

In another aspect,the present invention proposed an alternative site probe, including the probe housing is made with the possibility of extension of the downhole tool, and external packer carried by the housing of the probe, for insertion into tight contact with the first annular section of the wellbore. External packer has a through channel. In end-to-end channel external packer is the sample tube, forming between them an annular space. The sample tube is made with the possibility of extension of the probe housing and carries the inner packer at its distal end for introduction into tight contact with the second annular section of the wellbore within the first annular section. The first inlet in the probe housing is communicated through the fluid from the annular space to permit one of the natural fluid, contaminated fluid and combinations thereof in the downhole tool. A second inlet in the probe housing is communicated through a fluid medium with a sampling tube for the passage of the natural fluid in the downhole tool.

The sample tube is preferably provided with a filter for filtering particles from natural fluid passing into the sample tube. In a particular embodiment, the filter is a perforated portion of the sampling tube. The sample tube is also preferably possesses the and the external flange for ejection of particles from the sample tube when the extension of the sample tube relative to the outer packer.

In a specific embodiment, the inside of the sampling tube may be located a piston, which is made with the possibility of extension of the probe housing for ejection of particles from the sample tube during extension of the piston relative to the sample tube. The piston may include, for example, made of the axial bypass channel and one or more perforations in its side wall for transmission of natural fluid passing into the sample tube, in this axial bypass channel. Axial bypass channel is communicated through the fluid to the housing of the probe.

At its distal end of the sampling tube preferably has a packer.

In a specific embodiment, corresponding to this aspect of the present invention, the node probe may include a tubular spacer located in the annular space, to give external support to the packer. Tubular spacer may be provided with a filter for filtering particles from a natural fluid, contaminated fluid, or dirt passing into the annular space. The filter may include a perforated portion of the tubular spacers. More specifically, the tubular spacer and the sample tube can be equipped with filters that interact, natural filtering the fluid, zag is azanuy the fluid, or combinations thereof, admitted into the annular space.

Similarly, the sampling tube, a tubular spacer may be made with the possibility of extension of the probe housing under hydraulic pressure applied from the side of the downhole tool. The sample tube in the preferred embodiment, made with the possibility of extension to a greater extent than the tubular spacer to compensate for the erosion of the wellbore, in particular in the sampling tube or around it.

In an additional aspect, the present invention is a method of sampling natural fluid from an underground reservoir penetrated by a wellbore surrounded by a layer of contaminated fluid. The proposed method includes the steps that create the seal at the first annular section of the well bore and form a seal at the second annular section of the wellbore within the first annular section. These stages lead to the isolation of the annular section of the wellbore between the first and second ring sections, as well as to the isolation of the circular section of the wellbore within the first annular section. Then carry out the absorption of the fluid, including one from the natural fluid, contaminated fluid and combinations thereof, through an insulated annular section of the wellbore. In addition, the implementation of which by natural absorption of fluid through the isolated circular section of the wellbore. The proposed method preferably includes the additional step of collecting natural fluid through the isolated circular section of the wellbore.

In a specific embodiment, corresponding to the proposed method, creating a seal at the first annular section with a nominated external packer, as well as creating a seal at the second annular section with a retractable internal packer. Internal packer made with the possibility of extension beyond the outer packer. External and internal packers are the components of the probe is transported on a downhole tool located in a wellbore. In this embodiment, the phases of the suction and collection of the fluid is performed using site probe and the downhole tool.

In an additional aspect, the present invention, an apparatus for characterizing a subterranean formation penetrated by a wellbore surrounded by a layer of contaminated fluid. Underground reservoir has a natural fluid environment located outside a layer of contaminated fluid. The device includes a downhole tool configured to transport within the wellbore, and the site of the probe, carried by the downhole tool, for sampling the fluid. The site of the probe is preferably equipped as is written above, i.e. the node probe includes a probe housing, the outer packer and sampling tube, located in the bore channel outer seal and inner bearing packer at its distal end. There is also an actuator for moving the body of the packer between the designated position for transportation of the downhole tool and an extended position for sampling the fluid. The actuator preferably is operated to move the sample tube between the designated position and extended position so that the inner packer comes into tight contact with the second annular section of the wellbore.

In a specific embodiment, the proposed device further includes a flow tube passing through the section of the downhole tool and a built-in through the fluid with the first and second intake ports of the node probe to enter one of the natural fluid, contaminated fluid and combinations thereof in the downhole tool. Inside the downhole tool has one or more pumps for suction of one of the natural fluid, contaminated fluid and combinations thereof in the downhole tool via a flow pipe. Inside the downhole tool also preferably includes a camera for the Rob, which enters one of the natural fluid, contaminated fluid and combinations of pump (pumps), as well as a tool for analysis of the fluid sucked into the downhole tool via a flow pipe and the pump (pumps). The downhole tool may be configured to transport within the borehole by means of the cable, the drill string or pipe, collapsed into the Bay.

In another aspect, the present invention proposed a packer for use with a node of a probe carried by the downhole tool conveyed in the borehole penetrating the subterranean formation, surrounded by a layer of contaminated fluid and the subterranean formation has a natural the fluid contained in it outside layer of contaminated fluid. The packer includes an elastomeric casing packer having a distal surface adapted for introduction into intimate contact with the section of the wellbore. The case packer has an outer diameter and inner diameter, and inner diameter is limited to the bore channel passing through the body of the packer. The case packer is also provided with one or more channels made in the distal surface and positioned in the annular clean the intake between the inner and outer diameters. In one or more channels of the body of the packer is located m these channels, which is operatively connected by limiting flexible spacer ring. Through the body of the packer extends at least one bypass channel for transmission of one of the natural fluid, contaminated fluid and combinations thereof through the body of the packer.

For a detailed study of the foregoing features and advantages of the present invention, a more particular description of the invention briefly summarized above, may lead to location-specific variations in its implementation, which is illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only typical embodiments of this invention, so they should not be considered as limiting scope of the claims because the invention can take other, equally effective specific form.

Figure 1 represents a schematic view in vertical section of an underground formation penetrated by a well bore lined with filter crust.

Figa-2B are schematic views in vertical section corresponding downhole tools that can be transported by cable and conveyed on a drill string, each of these tools is located in the wellbore, shown in figure 1, together with the probe entered in contact with the reservoir, and also shown for C is contaminated and natural fluid in the downhole tool.

Figure 3 is a schematic view in vertical section known downhole tool in which a packer with a protective ring for isolating the reservoir of the fluid flowing into the sample tube.

Figure 4 represents a cross section of the side view of the packer according to figure 3.

Figure 5 is a schematic view in vertical section plot of the downhole tool having a system for sampling fluid and the site of the probe.

Figa shows the cross section of the node of the probe along the line 5A-5A in figure 5.

6 is a detailed schematic view of the site of the probe, alternative to that shown in figure 5.

Figa-7F illustrate various configurations of the ring cleanout standpipe, which is used in the node of the probe.

Figa-8G illustrate views of the end for various spacers or spacer elements, which are used in the ring clean the intake site probe.

Fign-8N illustrate the species in the plan for various spacers or spacer elements, which are used in the ring clean the intake site probe.

On figa-9B illustrate additional configurations of spacers, which are used in the ring clean the intake site probe.

Figa and 10B illustrate various forms of the bypass channels of the fluid used in the site probe.

11 presents the scheme is practical view in vertical section of the site probe, an alternative to that shown in figure 5 and 6.

Figa-E are detailed schematic views in the relevant working sequences node in the probe, alternative to that shown at 11.

Fig is a schematic view in vertical section of an alternative site probe having a tubular divider.

Fig represents the cross-section of the site shown in Fig conducted along section line 14-14.

Fig is a schematic view in vertical section of the site probe, shown in Fig, with the inner flange.

Fig is a graph depicting the relationship between the pressure drop and distribution of shares of performance when sampling between the intake sample and clean the intake.

In the above drawings is shown the preferred in the present embodiments of the present invention, which will be described in detail below. In the description of the preferred embodiments is similar or identical positions are used to identify common or similar elements. The drawings are not necessarily made to scale and certain features and certain types of drawings can be intentionally displayed in an enlarged scale or conditionally for the sake of clarity and expressiveness of the image.

Figure 5 shows the systems is 526 for sampling the fluid downhole tool 510, contains the node 525 probe and flow-through section 521 for selective absorption of the reservoir fluid in the desired section of the downhole tool. The downhole tool 510 is transported in the trunk 514 wells, surrounded by a zone 519 penetration, containing a layer of contaminated fluid 520. The shaft 514 wells passes through an underground layer 516 with natural fluid environment 522, outside layer of contaminated fluid 520.

Node 525 probe includes a housing 530 probe made with the possibility of selective extension of the downhole tool 510 using pigs 533 for nomination or other suitable actuator to move the probe housing allocated between the transport position of the downhole tool and an extended position for sampling the fluid (the latter being the position shown in figure 5). Case 530 probe carries a cylindrical packer 531, which has a distal surface 531s, adapted for insertion into tight contact with the filtration crust 515 and introduction into intimate contact with the wall section 517 of the wellbore. This distal surface may be made with a curvature, as shown by the surface 531s' in the embodiment of the packer according to Fig.6, to agree with the predicted curvature of the wall 517 of the wellbore with a the Yu create a more reliable seal with it.

Shown in figa packer 531 made of a suitable material well known in the art), such as rubber, and has an external diameter d1and inner diameter d2, the inner diameter d2limited counter channel (not labeled)through the packer. Packer 531 is also provided with a channel is made in its distal surface 531s and located so that it restricts the ring clean intake 534i between the inner and outer diameters of d1d2. Packer 531 can be done by pouring the material of the packer around the sample tube 527 (also explained below)that provides for the formation as a whole these components node 525 of the packer. Then in the distal surface 531s packer (i.e. in its front surface) perform intake channel (or channels, which may be) to create 534i ring cleanout standpipe.

Various aspects of the probe, showing details of the spacers 534u2, cleanout standpipe 534i and related channels s according to figure 5, shown in figa-9V. Although in the embodiment according to figure 5 and 5A shows the presence of one continuous channel s, the invention also covers embodiments of the packer incorporating sets of discrete channels, which is aspolozhena with limiting ring cleanout standpipe 534i. As shown in figa-7F, packer 531 you can use a variety of configurations, such as a single continuous channel s1many distant from each trapezoidal channels s2spaced from each other all channels s3spaced apart rectangular channels s4adjacent trapezoidal channels s5and elongated channels s6. The channel and/or clean the intakes may be located, forming a circle, as shown in figa, and oval, as shown in fig.7F, or other geometry.

Figa-7F also illustrate many of the spacers 535 (also referred to as spacer elements located in one or more channels. These spacers, as well as other configurations of the spacers illustrated in detail on fign-8N. Spacers come in various shapes complementary to shapes of the channels, and you can also use a variety of cross sections, including the various U-, V-, X -, and Ω-shaped cross section, put in the spacers 535u1-535u7(shown in figa-8G), and various symmetric and asymmetric profiles (shown in fign-8N).

Additional alternative embodiments of the spacers 535u8-9depicted on figa-9V. Thus, the spacers can be applied to many parallel linear components 534u, which operatively connect the us (at the upper sides of the spacers 535u 8on figa; in the Central parts of the spacers 535u9on figv), forming the various components in the form of grids or screens. Normal specialists in the art will understand that you can also use many other different configurations for operative connection of multiple spacers, resulting in the ability to achieve high deformability packer 531. The following is an explanation of the benefits of this increased deformability.

As shown in figa-F, spacers 535u in the preferred embodiment, operatively connected, limiting flexible spacer ring, for example, in the form of a chain, and they are attached form a closed curve that is consistent with one or more channels s. Fign also demonstrates that the spacers 535 may have made them in the first hole 556 for transmission of fluid in the bypass channels 528 packer (described below) and the second hole 558 for linking struts with each other and/or for attaching the spacers inside the material of the packer. These openings can be of different shapes, sizes and configurations in the respective spacers. Specialists in the art will understand that the spacers facilitate the desired movement of the node 525 of the probe, in particular packer 531, during operations of sampling (see, e.g., figure 5). The reason is that the seal forms the alignment along the distal surface 531s packer, depends on the deformability of the packer along its front surface (in particular, this is true in applications involving parts of all wells, not fixed casing). Conventional packer tends to move as a rigid element. This is also true to some extent in those conventional packers, where to apply solid protective ring. The use of discrete but operatively connected spacers in accordance with the present invention attached to the packer 531 high elastic deformability. For example, the surface areas 531s packer within the ring cleanout standpipe 534i have greater freedom of deformation regardless of the surface sections 531s packer outside the ring cleanout standpipe 534i.

Spacers 535 packer can be performed as a single unit with the packer 531, for example, by vulcanization, or, if they are sufficiently flexible spacers can be pressed into one or more channels s packer. In any case, the spacers must have sufficient stiffness and/or springiness to resist crushing of the material of the packer when the packer is pressed against the wall 517 of the wellbore. This stiffness can be achieved by selecting an appropriate material and geometry. For example, some of the options 535u1the implementation of the spacers shown in Fig.6 and 8A are-shaped cross-section with holes, limited angle α, preferably comprising 7° or more.

As shown in figure 5, at least one bypass channel 528 passes through the packer 531 for natural transmission fluid 522, contaminated fluid 520 and their combinations between one or more channels s and the first inlet hole 540 in the body 530 of the probe. The first inlet 540 is made in the body 530 of the probe. Hole 540 is communicated through the fluid from the downhole tool 510 described below. In the variants of implementation, providing multiple channels forming the ring clean intake 534i, packer 531 has plenty of respective bypass channels 528, each of which passes through the packer to pass one of the natural fluid 522, contaminated fluid 520 and their combinations between one of the channels s and the first inlet hole 540 in the body 530 of the probe.

Each of the bypass channels 528 in the packer 531 preferably coated tube 529, for example, for the spreading of the material of the packer to prevent its collapse when the bypass channel is subjected to compressive loads. The tube is preferably attached at its upper end to the corresponding spacer 535u2channel, and to some extent retain mobility at its lower end inside the one or more grooves 530g in the body 530 of the probe (6), enabling compression of the material of the packer under load. Such tubes may be made integral with the packer 531, for example, by casting packer around the tubes, the process determines the adaptability to the use of tubes and get the bypass channels 528, having various shapes and configurations. In the bypass channel 528 and/or the tube 527 you can insert a spring or series of rings to help prevent collapse of the overflow channel.

Figa illustrates another node 1025 probe, which has passing through it the bypass channel 529. This site probe is essentially the same as the node of the probe shown in figure 5, except that it has the bypass channels of different configurations, passing through the packer 531. The form of overflow channels is limited to a spiral tube 529'. Figure 10 illustrates In packer 531, which used tubes of different shapes, such as tubes 529" in the form of spiral coils, the S-shaped tube 529"', and supplementing the bypass channels inside the packer. These different arc tube are not necessarily moving one of the ends (as in Fig.6), as in its vertical movement of the tube will be subjected to compressive loads from the material of the packer, as a result of such movement will be ogran is to rise mainly transversely through the sections of the tubes. Figv also shows that the ends of the tubes may end in the body of the probe (for example, in the plate 530b Foundation) in different orientations, for example perpendicularly (see tube 529"') or in parallel (see tube 529"") the front surface of the base plate.

As shown in figure 5, we note that in the channel passing through the packer 531, is ensuring seal the sample tube 527 for natural transmission fluid 522 to the second inlet opening 538 in the body 530 of the probe. The second inlet opening 538 in the probe housing is also communicated through the fluid from the downhole tool, and further description below.

The sample tube 527 limits the intake 532 sample and interacts with the internal section of the packer 531, limiting barrier (not labeled), an insulating ring clean intake 534i from intake 532 sample. Although the sample tube 527 preferably concentric with the packer 531, it is possible for successful application and other geometries and configurations of the packer and/or probe.

Figure 6 shows the node a probe. This site probe is analogous to a node 525 of the probe shown in figure 5, with some modifications. For example, the packer a is located on the site a probe and has passing through it the piston 536. The bypass channel 528 also has a ring clean intake 534 channel and 534 2and struts 534u1the channels. The sample tube 527 itself can be made with the possibility of extension from the housing a probe under hydraulic pressure applied from the downhole tool to the legs R piston located slidable inside the chamber 555, contributing to the isolation of the intake 532 for samples from the ring cleanout standpipe 534i. This feature is advantageous, in particular when faced with the erosion of the wall of the wellbore opposite the intake 532 sample.

The sample tube 527 preferably provided with a filter for filtering the natural reservoir of the fluid admitted into the intake 532 sample the sample tube 527. This filtering action will be provided with many perforations R in the side wall of the piston 536, located slidable in the sampling tube 527. The piston 536 is made with the possibility of extension under the action of hydraulic pressure applied from the side of the hull a probe, and includes a head 530h piston having an enlarged diameter, intake and exhaust particles (for example, accumulations of mud particles from the sample tube 532 when the extension of the piston 536 relative to the sample tube 527. The piston further includes, for example, made axial pereus the Noah channel 557, reported by the fluid with perforations l in the side wall of the piston, for the natural transmission of the fluid admitted into the sample tube 532, in this axial bypass channel. Axial bypass channel is communicated through the fluid to the second inlet 538 (figure 5) in the probe housing.

Figure 11 schematically illustrates an alternative implementation of the node 1125 probe. In this embodiment, external packer 1131 does not include clean intake per se, but cooperates with the inner packer 1159, limiting ring clean intake 1134i. Thus, the housing 1130 probe carries an external packer 1131 for introduction into tight contact with the first annular section 1160 wall 1117 wellbore. Wall 1117 wellbore limits the trunk 1114 well and lined cake 1115. Area 1119 penetration surrounds the wall of the wellbore and comes in the underground layer 1116, has contained in it natural the fluid 1122.

External packer 1131 has passing through it the channel 1131b. In the channel 1131b external packer is the sample tube 1127, forming the annular space 1152 between them. The sample tube 1127 made with the possibility of extension from the housing 1130 probe by hydraulic pressure applied from storagesquirting tool for initiating one or more actuators (well known in the art, see, for example, U.S. patent No. 3924463), and bears internal packer 1159 at its distal end for introduction into tight contact with the second annular section 1164 of the barrel 1114 well within the first annular section 1160. The distal end of the sampling tube preferably contains an annular channel (not labeled)and an inner packer 1159 has a toroidal shape and is installed in the annular channel of the distal end of the sampling tube for introduction into contact with the wall 1117 wellbore.

The sample tube 1127 preferably provided with a cylindrical filter 1170 for filtering particles from natural fluid 1122 (as well as other fluid)admitted into the sample tube 1127. The annular space 1152 is also equipped with a filter 1172 for filtering particles from one of the contaminated fluid 1120, natural fluid 1122 and their combinations permitted in the annular space 1152.

This feature adjustable sampling tube 1127 provides some possible reactions to the forces acting on the inner packer 1159. In particular, this feature is useful when installing internal packer 1159 in weak rocks (i.e. weak wall of the wellbore), and also provides for adjustment of the inner packer, if the production fluid from the formation is accompanied by the erosion of porous then the water reservoir on the surface of the section "packer-Plast. This is illustrated by the extension of the inner packer 1159 to the eroded portion of the wall of the wellbore in the vicinity of the second annular section 1164.

The housing 1130 probe is further provided with a first inlet hole 1140, which is communicated through the fluid from the annular space 1152 for admission to one of the natural fluid 1122, contaminated fluid 1120 and their combinations in the downhole tool (not shown figure 11). Along the inner surface of the one or more packers may be positioned a support (not shown) to prevent the intrusion of the material of the packer in the first inlet opening 1140. The second inlet hole 1138 in the housing 1130 probe is communicated through the fluid from the sampling tube 1127 for admitting natural fluid 1122 in the downhole tool.

On figa-12E shows another variant implementation of the node 1225 probe. Figa-12E illustrate the operation of the node 1225 probe when it is put into contact with the wall of the wellbore (figa), begins the intake of fluid (pigv), moving, maintaining a seal with the wall of the wellbore during sampling (figs), sucks the fluid in the downhole tool (fig.12D) and removed, leaving the contact with the wall of the wellbore (fige).

Node 1225 probe is analogous to a node 1125, shown at 11, and the main difference is the way in means for filtering the fluid. Accordingly, moving the sample tube 1227 equipped with a filter for filtering particles from natural fluid 1122 (or other fluid)admitted into the sample tube 1227, and the filter is made in the form of perforations l in the side wall of the sample tube 1227. The sample tube is preferably provided with external flange 1227f for ejection of particles from the annular space 1252 when nominating the sample tube 1227 relative to the tubular spacers 1272, located in the annular space 1252, in order to give support to the external packer 1231.

Tubular spacer 1272 also equipped with a filter in the form of perforations l in the side wall of the tubular spacers 1272 for filtering particles from a natural fluid, contaminated fluid, or combinations thereof allowed in the annular space 1252. More specifically, the sample tube is further provided with filters in the form of perforations 1227q in the area of the side wall of the sample tube, which serves as a support flange 1272, and these openings communicate with the filter R tubular spacers designed to filter natural fluid, contaminated fluid, or combinations thereof allowed in the annular space 1252.

Inside of the sampling tube 1227 is also the piston 120, made with the possibility of extension of the probe housing (not shown in figa-E) for emission of particles from the sample tube during extension of the piston relative to the sample tube 1227. The piston may include, for example, located inside the axial bypass channel 1271 and one or more perforations R in its side wall for the natural transmission of the fluid admitted into the sample tube 1227, in the axial bypass channel 1271. Axial bypass channel 1271 reported by the fluid from the second inlet (not shown in figa-E) in the probe housing.

Similarly, the sampling tube 1227, tubular spacer 1272 can be made with the possibility of extension of the probe housing under hydraulic pressure applied from the side of the downhole tool. In a preferred embodiment, the sample tube 1227 made with the possibility of extension to a greater extent than the tubular spacer 1272, to compensate for the erosion of the wellbore, in particular, the sampling tube or around it. The ability to move each of the parts such as the sample tube, the tubular spacer and the piston makes the site probe adapted in particular for use in the weak walls of the boreholes and/or erosive conditions of the rocks. These tubular elements are deepened p and the effective conversion of hydraulic pressure, apply the downhole tool, the extension of these elements towards the wall 1217 wellbore or removal from the wall. Thus, when the preset hydraulic pressure is applied from the side of the downhole tool, each of the external packer 1231 and internal packer 1259 can be nominated, entering into contact with the respective first and second annular sections 1260, 1264 wall 1217 wellbore, as shown in figa.

Shown in figv piston 1270 extracts, using the pressure of the downhole tool to uncover the perforations R in the piston in accordance with a filtering perforations R sampling tube 1227. This has the likely effect of the buoyancy section of the mud cake 1215 to release it from the wall 1217 of the wellbore within the first annular region 1264. Fluid passes into the sample tube 1227 and moves filtration through the perforations R, as illustrated by the arrows.

As shown in figs, reservoir fluids are absorbed through the wall of 1217 well bore in the annular space 1252 and the intake 1232 sample under the action of the differential pressure provided by the downhole tool (not shown in Fig). A wall section 1217 of the wellbore within the first kolicevo the plot 1260 shown vulnerable to erosion, and you can see that the pressure applied to the sample tube 1227, was pushed out of the sampling tube with the inner packer 1259 outward to maintain contact with the wall 1217 wellbore as erosion of the wall.

Generated fluid medium particles 1275 and 1277 shown filtered through an appropriate filter perforations R of the sampling tube (the latter also interact with perforations 1227q of the sample tube). Fluid (one of the contaminated fluid, natural fluid and combinations thereof)flowing through the annular space 1252, passing the tubular spacer 1272, Pets in the downhole tool through the first inlet 1240, as shown by the arrows. Fluid (first is also one of the contaminated fluid, natural fluid and combinations thereof)flowing through the intake 1232 sample passing through the sample tube 1227, Pets in the downhole tool through the second inlet 1238, as shown by the arrows. Filtration perforation holes R contribute filtering the fluid when it enters the instrument.

Shown in fig.12D tubular spacer 1272 and the sample tube 1227 promoted under pressure applied from the side of the downhole tool in the area of further arose is, test wall 1217 wellbore. In addition, the filtered particles 1277 shown as beginners to accumulate in the annular space 1252. Promotion of tubular spacers maintains a barrier between the intake 1232 sample ring and clean the intake 1252 to prevent cross-flow and/or cross-contamination between them as erosion wall 1217 wellbore.

Shown in fige node 1225 probe in place against the wall 1217 wellbore, so that the downhole tool may be separated from the wall of the wellbore. The piston 1270 fully extended inside of the sampling tube 1227, which contributes to the emission of particles 1275 of the sample tube. In addition, the tubular spacer 1272 allocated, thereby pumping fluid using a pump inside the downhole tool (described elsewhere in this application). The choice of the sampling tube 1227 can be selectively actuated to move relative to the tubular spacers 1272. The movement of the sample tube and tubular spacers can be manipulated, for example, under the influence of hydraulic pressure applied from the side of the downhole tool or the collected formation fluid, which is forced to flow through a flow tube to the fluid or inlet overstable ensure ejection of particles from the annular space 1252. The sample tube 1227 and internal packer 1259 also withdrawn from contact with the wall of the wellbore and taken to the site of the probe.

Another variant implementation of the node 1325 probe is shown schematically in Fig-14. On Fig shows the incision site of the probe. On Fig presents a horizontal cross section of the node of the probe shown in Fig conducted along section line 14-14. Node transmitter includes a packer 1331, provided with a continuous annular channel (or, alternatively, the Central bore channel), limiting ring clean intake 1334. The probe housing (not shown in Fig-14) is the sampling tube 1327, shown in the permanent assigned position to prevent contact with the wall of the wellbore, and limits the intake 1332 sample. Thus, when the probe housing is extended from the downhole tool introducing packer 1331 in contact with the wellbore, the sample tube 1327 remains separated from the wellbore.

The site of the probe in accordance with this embodiment preferably also includes a tubular divider 1335, located in the annular clean the intake 1334. Tubular divider 1335 operatively connected to the packer 1331 through a set of radial ribs 1335r located between them, so that the tubular divider is in contact with the wall with the oxen bore through the packer (i.e. is simultaneous contact formation with packer). This option is the implementation of the site probe may choose to provide a flexible spacer rings described above, but it is a spacer ring (not shown in Fig-14) is sufficiently recessed within the annular cleanout standpipe 1334 to allow space for the tubular divider 1335. Tubular divider 1335 has a length smaller than the length (i.e. thickness) of the packer 1331, thereby limiting two annular bypass channel a and 1334b in the outer annular section of the ring cleanout standpipe 1334. The bypass channels a and 1334b pass in a single bypass channel downstream from the tubular divider 1335.

Division ring cleanout standpipe 1334 two isolated region of the tubular divider 1335 prevents mixing of the fluid extracted along sections of the wall of the well bore from the inside of the tubular divider, with a fluid medium, mined areas along the walls of the well bore outside of the tubular divider. Thus, internal bypass a will show a tendency to fill the natural fluid medium (after the initial flow of pollutants), leaving a "buffer" area between the intake 1332 for samples and external bypass channel 1334b, which can often be filled with contaminated fluid medium. Pax is so, because the sample tube 1327 allocated from the wall of the wellbore, the pressure equalization between the ring clean intake 1334 and intake 1332 sample is not delayed. This should help to mitigate the negative impact of pressure pulses that may be generated by the pump (pumps) of the downhole tool, pumping the fluid through the inlet probe (not shown in Fig-14).

On Fig shows an implementation option, which is alternative to that shown in Fig-14, the packer 1331 is provided in its neck inner flange 1331f limiting the scope of the inlet in the annular bypass channel 1334b, which is at the outside in the radial direction of the two annular bypass channel formed by a tubular divider. This limited the inlet opening extends to a greater bypass channel 1334b, creating additional space for contaminated fluid, and helps prevent cross-flow, while helping to capture natural reservoir fluid sampling tube 1327.

On Fig presents a graph depicting the relationship between the pressure drop and distribution of shares of performance when sampling between intake for samples and clean intake in accordance with another aspect of us is Otsego invention. In particular, this aspect of the invention relates to the discovery that the operational characteristics of the site probe may be characterized, in particular, three physical parameters: internal diameter of the sampling tube, and the outer and inner diameters clean the annular space (also called protective annular space). These diameters determine the flow area of the intake sample and clean the intake, and between them the material area of the inner packer. This, in turn, affects the performance of the current node of the probe.

The geometry of the probe and/or packer can be optimized by limiting the relationship between flow and differential pressure between the intake sample and clean the intake. This optimization can be used to maximize the natural flow of the fluid into the sample tube, thereby reducing the likelihood that contaminated fluid in the intake for sampling. In addition, this geometry can also be manipulated by decreasing the pressure difference between the two intakes at a given flow and thereby lowering the voltage applied to the inner packer. In the variants of implementation, the geometry can be chosen so as to provide a small pressure drop or no drop davleniya mentioned intakes with respect threads close to one. This configuration enables the use of similar or identical pumps for collection of the sample and clean the collection.

The optimization process involves changing the geometry of the three diameters up until you reach the desired coefficient (will achieve the desired coefficients) performance (when comparing clean the intake and intake for samples) at zero differential pressure at the wall of the wellbore. On Fig shown on line 1602, denoting the flow through the clean intake, and the line 1604, indicating the flow through the intake sample, at different pressure differentials between clean intake and intake for samples. These lines represent the graph for the same geometry, in which the inner diameter of the ring cleanout standpipe approximately 2-2 .5 times larger than the inner diameter of the intake sample, and the outer diameter cleanout standpipe approximately 2.5 to 3 times the inner diameter of the intake sample. This is equivalent to the external diameter cleanout standpipe, approximately 1.2 times greater than the internal diameter cleanout standpipe. This configuration provides a performance intake for samples (see point X on the graph), which is approximately 20% of the total performance, and production is detelnosti to clean the intake (see point Y on the graph), which is approximately 80% of total capacity at zero differential 1610 pressure between the intake sample and clean the intake). Accordingly, the pressure difference can be increased in order to provide intake for samples that kind of performance, which is approximately 50% of the total performance (see point Z on the graph, in which the curves intersect clean the intake and intake for samples), long before the spontaneous occurrence of undesirable cross-flow of clean suction in the intake sample (see line 1608). The fluid flow in the respective intakes can be manipulated in such a way that the point Z of the intersection can be offset with the possibility of it with many different pressure drops, including a zero differential pressure. The point Q is a point where the flow through the intake sample is maximized immediately before the occurrence of cross-flow between 1608 flowing pipes. Therefore, manipulation of the geometry of the flow tube or probe can be used to determine the corresponding points on said graph and generate the optimal flow in the tool.

Next, with reference to figure 5, provides a detailed explanation of the operation of sampling for p is taking the natural reservoir of the fluid in the line, at least with one aspect of the present invention. Flowing section 521 includes one or more devices-flow control, such as a pump 537, flow line 539 and valves 544, 545, 547 and 549 for selective absorption of fluid in different parts of the flow sections 521 through the first inlet 540 probe and the second inlet 538 probe, available in the housing 525 probe. Accordingly, the contaminated fluid 520 is preferably passed from the reservoir zone 519 penetration into the ring clean intake 534i, then one or more bypass channels 528 packer in the first inlet 540 probe, and then produced in the barrel 514 wells. Natural fluid preferably passes from the reservoir 516 in the intake 532 sample, through the second inlet 538 probe, and then either deviates in one or more chambers 542 for samples that are designed or intended to collect or release in the trunk 514 wells. Immediately after the establishment of that fluid entering the intake 538 sample, is a natural fluid medium, you can include a valve 544 and/or 549 using known methods of regulation by manual and/or automatic operation, deflecting the fluid in the chamber 542 sample. Normal specialists in the art will understand that for the realization of prot is offered by the section 521 suit different known means for admitting fluid, for example, such as a means for admitting fluid described in U.S. patent No. 3924463.

System 526 for sampling is also preferably equipped with one or more systems 553 operational control fluid designed for analysis of fluid after contact with the flowing section 521. System 553 operational control fluid can be fitted with various devices operational control, such as an optical analyzer 572 fluid for measuring the optical density of the fluid admitted from the inlet holes 540 of the probe, and an optical analyzer 574 fluid for measuring the optical density of the fluid admitted from the inlet 538 probe. Each of the optical analyzers fluid may be a device such as the analyzer described in U.S. patent No. 6178815, the authors Felling, etc. and/or in U.S. patent No. 4994671, the authors Safinya, etc. Should also be understood that in systems such as system 553 operational control of a fluid medium, it is possible to use other devices operational control fluid, such as pressure gauges, measuring devices, sensors and/or other equipment for measurement, involving the assessment of parameters such as temperature, pressure, composition, contamination and/or other parameters, well-known specialists in this field of technology.

Inside the system 553 operational control of fluid preferably also includes a controller 576 to retrieve information from the optical analyzer (optical analyzers) fluid and sending signals in response to change of pressure drop, which calls for the fluid in the intake 532 for samples and/or ring clean intake 534i node 525 of the probe. In this case, specialists in the art will understand that the controller can be placed in other parts of the downhole tool 510 and/or system (not shown)located on the surface, to ensure operation of the various components inside the barrel 514 wells.

The controller 576 is configured to carry out the various operations throughout the system 526 for sampling fluid. For example, the controller configured to enable the various devices within the downhole tool 510, for example, selectively enable pump 537 and/or valves 544, 545, 547, 549 for regulating flow into the intakes 532, 534i, selective inclusion of the pump 537 and/or valves 544, 545, 547, 549 for suction of fluid into the chamber (camera) 542 for samples and/or release of fluid into the barrel 514 wells for collecting and/or transmitting data to analyze itself well, as well as other features that facilitate the implementation of the sampling process.

Figure 5 is illustrated the structure of the flow of the current environment, held in the downhole tool 510. First, as shown in figure 1, the area 519 penetration surrounds the wall 517 of the wellbore. Natural fluid medium 522 is in the reservoir 516 outside 519 penetration. When fluid flows into the intakes 532, 534i, contaminated fluid 522, located in the area 519 penetration near the intake 532, in the end, removes and frees the path for natural fluid 522. At some point during the process, when fluid passes from the reservoir 516 in the node 525 of the probe, the natural fluid 522 breaks and falls into the sample tube 527, as shown in figure 5. Thus, from this point on only natural fluid medium 522 is sucked into the intake 532, and contaminated fluid 520 flows in the annular jetting intake 534i node 525 of the probe. To ensure this result, the flow pattern, pressure and dimensions of the probe can be modified in order to achieve the desired flow path, in particular, to resist the emergence of cross-flow from the ring cleanout standpipe 534i in the intake 532 sample, as described above.

Details of some of the layouts and components for sampling, described above, as well as alternatives for these layouts and components must be known specialist is in the art and can be found in other patents and printed publications, such as described above. Moreover, specific layout and system components for sampling borehole fluid can be changed depending on factors operating in each specific design, application or situation. So, any system for sampling fluid, neither the present invention is not limited to the above configurations and components and may include any suitable components and layout. For example, different flow pipe, location of pumps can be adjusted to provide a variety of configurations. Similarly, the layout and components of the wellbore and the site of the probe can be changed depending on factors operating in each specific design, application or situation. The above description of possible components and environments where working tool that you can use the site probe and other aspects of the present invention are provided for purposes of illustration and not to limit the present invention.

The amount of the claims of this invention should be determined only by the wording of the items in the following claims. The term "containing" in the framework of the claims should be considered as meaning "including, at least ...", so here is the list of items in the claim PR is dstanley an open group. The terms used in the singular, should be considered include the plural, unless specifically agreed otherwise.

1. Site probe designed for use with a downhole tool located in a wellbore surrounded by a layer of contaminated fluid, and passing from an underground formation having a natural fluid environment located outside a layer of contaminated fluid, the site of the probe includes a probe housing is made with the possibility of extension of the downhole tool, the packer is located on the housing of the probe containing the distal surface adapted for introduction into intimate contact with the section of the wellbore and having an outer diameter and inner diameter, the inner diameter is limited by the channel passing through the packer, and the packer is further provided with one or more channels made in the distal surface and positioned with limiting ring cleanout standpipe between the inner and outer diameters, a set of spacers that are located in one or more channels and operatively connected by limiting flexible spacer ring, and at least one bypass channel passing through the packer, to pass one of the natural fluid, contaminated fluid and their combination is between one or more channels and the first inlet in the probe housing, communicating through the fluid from the downhole tool, sampling tube, tightly installed in the channel passing through the packer, for the natural transmission of fluid to the second inlet hole in the probe housing, soobshayem through the fluid from the downhole tool.

2. Site probe of claim 1, wherein the probe housing is made with the possibility of extension under the action of hydraulic pressure applied from the side of the downhole tool.

3. The site of the probe according to claim 1, in which the sample tube is made with the possibility of extension of the probe housing under the action of hydraulic pressure applied from the side of the downhole tool.

4. The site of the probe according to claim 1, in which the sample tube equipped with a filter for filtering particles from natural fluid flowing into the sample tube.

5. The site of the probe according to claim 1, additionally containing a piston located inside the sampling tube and made with the possibility of extension of the probe housing for ejection of particles from the sample tube during extension of the piston relative to the sample tube.

6. The site of the probe according to claim 5, in which the piston includes made axial the bypass channel and one or more perforations in its side wall to allow the nature of the fluid, p is stepping into the sample tube, in this axial bypass channel, and an axial bypass channel is communicated through the fluid to the housing of the probe.

7. The site of the probe according to claim 1, wherein the spacers are made as a single unit with the packer.

8. The site of the probe according to claim 1, in which spacers are flexible and pressed into one or more channels.

9. The site of the probe according to claim 1, in which the packer is provided with a single continuous annular passage in the distal surface between the inner and outer diameters of the packer.

10. The site of the probe according to claim 1, in which the packer is equipped with a number of channels made in the distal surface and located with limiting ring cleanout standpipe between the inner and outer diameters of the packer.

11. Site probe of claim 10, in which the packer is equipped with a number of overflow channels passing through it to pass one of the natural fluid, contaminated fluid and combinations thereof between one of the channels and the first inlet in the probe housing.

12. The site of the probe according to claim 1, in which each bypass channel in the manifold lined up.

13. The site of the probe 12, in which each tube bypass channel is made as a single unit with the packer.

14. Site probe designed for use with a downhole tool located in a wellbore surrounded by a layer of contaminated fluid is th environment, passing from an underground formation having a natural fluid environment located outside a layer of contaminated fluid, the site of the probe includes a probe housing is made with the possibility of extension of the downhole tool, the outer packer located on the body of the probe, for insertion into tight contact with the first annular section of the wellbore having a through channel, sampling tube, located in the channel of the outer packer, forming between them an annular space, made with the possibility of extension of the probe housing and the bearing inner packer at its distal end for introduction into tight contact with the second annular section of the wellbore within the first annular section, the first inlet in the probe housing that communicates through the fluid from the annular space to permit one of the natural fluid, contaminated fluid and combinations thereof in the downhole tool, and a second inlet in the probe housing that communicates through a fluid medium with a sampling tube for the transmission of natural fluid in the downhole tool.

15. The site of the probe 14, in which the probe housing is made with the possibility of extension under the action of hydraulic pressure applied from the side of the downhole tool.

16. The site of the probe according to claim 1, in which the sample tube equipped with a filter for filtering particles from natural fluid flowing into the sample tube.

17. The site of the probe 14, in which the distal end of the sampling tube contains an annular channel.

18. The site of the probe 17 in which the inner packer has a toroidal shape and is installed in the annular channel of the distal end of the sampling tube.

19. The site of the probe 14, further containing a tubular spacer located in the annular space, to support the external packer.

20. The site of the probe according to claim 19, in which the tubular spacer is provided with a filter for filtering particles from a natural fluid, contaminated fluid, or contaminants entering the annular space.

21. The site of the probe in claim 20, in which the sample tube provided with an external flange for ejection of particles from the annular space when the nomination of the sample tube relative to the tubular spacers.

22. The site of the probe 14, further containing a piston located inside the sampling tube and made with the possibility of extension of the probe housing for ejection of particles from the sample tube during extension of the piston relative to the sample tube.

23. The site of the probe in article 22, in which the piston includes made axial the bypass channel and one who does more perforations in its side wall to allow the natural fluid, admitted into the sample tube, in this axial bypass channel, and an axial bypass channel is communicated through the fluid to the housing of the probe.

24. The method of sampling natural fluid from the subterranean formation through which the wellbore surrounded by a layer of contaminated fluid, comprising the following steps:
creating a seal at the first annular section of the wellbore;
creating a seal at the second annular section of the wellbore within the first annular section, thereby isolating the annular section of the wellbore between the first and second annular sections, and the circular section of the wellbore within the first annular section;
the implementation of one of the natural suction of the fluid, contaminated fluid and combinations thereof through an insulated annular segment of the borehole;
the implementation of the natural suction of fluid through the isolated circular section of the wellbore.

25. The method according to paragraph 24, additionally comprising the step of collecting the natural fluid that is absorbed through the isolated circular section of the wellbore.

26. The method according to paragraph 24, which form a seal with the first annular section with a nominated external packer and form a seal at the second annular section with a proposed HV the internal packer, made with the possibility of extension beyond the outer packer, the external and internal packers are the components of the probe is transported on a downhole tool located in a wellbore.



 

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The invention relates to drilling wells and can be used to determine the various parameters and properties of the surface layer

FIELD: testing the nature of borehole walls and formation testing particularly for obtaining fluid samples or testing fluids, in boreholes or wells.

SUBSTANCE: device comprises tubular body to be secured inside drilling string arranged in well bore. The tubular body is provided with one or several extensions created along body axis and forming expanded axial part. Probe is arranged in expanded axial body part zone having minimal cross-section. The probe may be moved between extended and retracted positions. In extended position probe may touch well wall to gather information from formation. To protect probe during drilling operation probe in brought into retracted position. Drive adapted to move the probe between extended and retracted positions is installed on the body.

EFFECT: increased accuracy of well and formation testing.

38 cl, 29 dwg

FIELD: survey of boreholes or wells, particularly measuring temperature or pressure.

SUBSTANCE: device comprises pretest piston to be arranged in flow communication with reservoir, a number of manometers installed in pressure line and valves for selectively supply one of fluid or drilling mud in measuring device. Method involves performing the first test to determine reservoir parameter to be estimated; using the first pretest for the second pretest calculation and obtaining estimated reservoir parameters for reservoir characteristics evaluation.

EFFECT: possibility of reservoir testing device usage to perform measurements at well bottom during predetermined period, decreased land-based system intervention.

36 cl, 27 dwg

FIELD: testing the nature of borehole walls, formation testing, methods or apparatus for obtaining samples of soil or well fluids, namely downhole tools to determine reservoir parameters.

SUBSTANCE: method involves arranging downhole tool having probe in well bore, wherein the probe comprises at least one executive mechanism for probe extension and retraction; moving the probe to provide probe contact with well wall and accumulating reservoir data. Protective screen is arranged around probe. The protective member may slide between retracted position, where protective member is arranged near body, and extended position, where protective member touches well bore wall, independently of probe.

EFFECT: improved probe and well bore protection, possibility to accumulate data or take samples without erosion.

30 cl, 10 dwg

FIELD: mining engineering, oil industry.

SUBSTANCE: invention refers to oil and gas industry, specifically to formations testers. Tester comprises of elongated case, support blade moving forward from case surface and carrying probe to make canal between case inner surface and formation, sealing washer attached to probe, anchor mechanism for case mounting. Case includes eccentric area. Support blade is installed in such a way that it is possible to keep specified clearance between case and well bore side as case is installed on level in well bore. As formation pressure-testing operation is performed case is lowered into well bore up to level of measurements, support blade and anchor mechanism are moving forward, sealing washer and probe are pressed down, and formation pressure is measured. Risk of device blocking is reduced.

EFFECT: production of formation testers ensuring process optimization and reliability improvement.

18 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to downhole analysis of underground bed. Specifically invention refers to sampling through perforations in well bore leading to the underground bed. Method and device for caving reduction in perforation formed in well bore and leading from well bore to underground bed are offered. The well bore contains the device body with the lever moving forward. The perforation contains one or more caving block units mounted by using the lever. Caving block unit is designed so that to prevent caving from base fluid to the body through perforation.

EFFECT: reduced contamination of base fluid.

31 cl, 20 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to device and method allowing the bench estimation in drilling. The proposed device arranged in wellbore, nearby the subsurface bench, comprises the casing, casing fluid inlet, fluid pump communicating with the said casing fluid inlet and incorporating the first piston fitted in the pumping chamber to suck in and discharge fluid when acted upon by tubing pressure.

EFFECT: device and method higher reliability and efficiency, space saving in river drill pipes.

18 cl, 10 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to underground formation analysis. Proposed device comprises instrument casing that can move inside wellbore extending into underground formation, probe housing carried by instrument casing and designed to isolate wellbore wall zone, actuating mechanism to move said probe unit between preset position whereat instrument casing moves and developed position intended for wellbore wall isolation. It comprises also perforator that passes through said probe unit to sink wellbore wall isolated zone section and pass through at least one of strengthened formations or casing strings, power source arranged in instrument casing and connected with perforator to control it. It uses also bypass line passing through instrument casing section and connected with at least one of the elements that follow, i.e. perforator, actuating mechanism, probe unit, and combination thereof to suck in brine fluid. It is connected also with pump arranged in instrument tool to suck in brine fluid into instrument casing through aforesaid bypass line.

EFFECT: higher accuracy.

18 cl, 24 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: sounding electrode assembly execute fluid medium sampling from a borehole, going through underground reservoir with a fluid medium, located beyond a contaminated fluid medium layer, surrounding the borehole. The sounding electrode assembly contains a case, executed with ability to move forward from down hole equipment and a located in the case parker, with a distal surface for the full contact with the borehole section. The parker has internal and external peripheries, at that the external one limited with a channel, going through the parker. The parker additionally equipped with a channel (channels) executed in the distal surface and located with ability to limit a ring cleaning intake nozzle between the internal and the external peripheries. A bypass channel goes through the parker for natural fluid medium bypassing and/or the contaminated fluid medium between channels. In the parkers channel a sampling tube installed densely for the natural fluid medium bypassing to the second intake hole of the case and to equipment.

EFFECT: providing of required compacting with the reservoir, increase of clean fluid medium flow into the equipment, fluid medium flow into the instrument optimisation.

26 cl, 42 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to well survey, particularly to procedures of underground reservoir estimation by means of downhole instrument. For this purpose a viscosity gage-densimetre for a downhole tool is arranged in well borehole drilled through an underground reservoir. The downhole tool is designed for supply of at least a portion of reservoir fluid into the viscosity metre-densimetre. The viscosity metre-densimetre consists of a sensitive block and of a design diagram for calculation of at least two parametres of fluid, notably, viscosity and density. The sensitive block is located inside the downhole tool and contains at least two distanced in space connectors, a string suspended with tension between the connectors, and at least one magnet generating magnetic field interacting with the string. The string interacts with reservoir fluid when the viscosity metre-densimetre is inserted inside the downhole tool, and the downhole tool is located in the underground reservoir and intakes fluid from the underground reservoir. The connectors and the string are made out of materials with similar ratios of heat expansion and form a frequency oscillator.

EFFECT: increased reliability of device operation in well; upgraded accuracy of measuring parametres of reservoir in well.

18 cl, 17 dwg

FIELD: oil and gas production.

SUBSTANCE: according to one version first fluid is produced in first point of well. Fluid is entrapped into the device. The second fluid is produced in the second point of well. To obtain data on properties of fluids analysis of fluids is made with the said device in well under in essence similar well conditions. Uncertainty in obtained properties of fluid is quantified. Also, according to one version the device is equipped with a downhole tool consisting of a pipeline with an optic cell, of a selectively operating appliance, of a fluid analyser and of at least one processor. The selectively operating appliance is connected with the pipeline to facilitate flow and entrapment of at least the first and second fluids through the optic cell. The fluid analyser is optically connected with the cell; it outputs data about properties of the first and the second fluid flowing through the cell. The processor is coupled with the downhole tool and consists of appliance for receiving data on fluid properties from the downhole tool. Data on fluid properties are obtained under in essence the same well conditions. The said processor quantifies uncertainty in fluid properties.

EFFECT: upgraded accuracy in analysis of well bore fluid properties.

25 cl, 27 dwg

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