Method and device to analyse fluid

FIELD: oil-and-gas industry.

SUBSTANCE: proposed device comprises test chamber, appliance to displace fluid, pressure device and at least one transducer. Test chamber makes a fluid receiving estimation chamber. Appliance to displace fluid comprises drive to act on fluid to make it displace inside said test chamber. Pressure device continuously varies fluid pressure.

EFFECT: accurate real-time analysis inside borehole.

27 cl, 8 dwg

 

The present invention relates to technology assessment subterranean formation using a downhole tool, placed in the wellbore, held in underground formations. More specifically, but not as a limitation, the present invention relates to technologies for measuring fluids of the formation.

Wells are drilled to determine the location and production of hydrocarbons. Downhole drilling tool with a drill crown on his end digs into the ground for the formation of the wellbore. With the deepening of the drilling tool drilling mud is pumped through the drilling tool and out of the drilling crown for cooling the drilling tool and to remove sludge. Drilling mud additionally forms a filter cake, which covers the wellbore.

During drilling operations it is desirable to perform various evaluations of the formation traversed by the wellbore. In some cases, the drilling tool must be removed, and the tool may be lowered into the borehole on a cable for testing and/or sampling formation. In other cases, the drilling tool may be equipped with a device for testing and/or sampling of the surrounding formation, and drilling tools can be used to perform testing or sampling. These samples or tests can be used is carried out, for example, to locate useful hydrocarbons.

Evaluation of the formation often requires that the fluid from the formation has been removed in the downhole tool for testing and/or sampling. Various devices, such as probes, extended from the downhole tool to establish communication with the fluid of the formation surrounding the wellbore, and to extract the fluid in the downhole tool. A typical probe is a cylindrical element that is extended from the downhole tool and placed opposite to the side wall of the wellbore. Rubber seal on the end of a probe is used to create a seal with the wall of the wellbore. Another device used to form a seal with the wellbore, is called a double seal. Dual seal two elastomeric rings fixed to the tool to isolate the portion of the wellbore between them. Rings form a seal with the wall of the wellbore and allow the fluid to get into the isolated portion of the wellbore and into the inlet hole in the downhole tool.

Filtration crust covering the wellbore, often assists the probe and/or a double seal to create a seal with the wall of the wellbore. When the seal is made, the fluid from the formation izvlekaet is camping in the downhole tool through the inlet due to low pressure in the downhole tool. Examples of probes and/or seals used in downhole tools are described in U.S. patents№№6301959; 4860581; 4936139; 6585045; 6609568 and 6719049 and the application for U.S. patent No. 2004/0000433.

Evaluation of the formation is usually performed on the fluid extracted in the downhole tool. Currently there are technologies perform various measurements, preliminary testing and/or sampling fluid, which enters the downhole tool.

The fluid flowing through the downhole tool may be tested to determine various downhole parameters or properties. Various properties of the hydrocarbon fluid reservoir, such as viscosity, density and phase behavior of fluids at reservoir conditions, can be used to estimate potential reserves, determination of flow in a porous medium and the design of systems completion, separation, processing, and measurement, among others.

Additionally, samples of the fluid can be collected in the downhole tool and retrieved to the surface. The downhole tool stores the formation fluids in one or more selected cells or containers for samples and extracts cylinders on the surface with the formation fluid under pressure. An example of this type of sampling is described in U.S. patent No. 6688390. Such tests are sometimes called living fluids. Such fluids can ZAT is to be sent to the appropriate laboratory for further analysis. Conventional analysis or determination of the parameters of the fluid may include, for example, the composition analysis, fluid properties and phase behavior. In some cases, this analysis can also be carried out on the surface of the well using a mobile laboratory system. Developed technology to perform tests of a living fluid on the surface. Many measurements of fluid may require a time of the order of hours or more. For example, when analyzing or detecting the phase behavior of the fluid begins with one state, liquid or gas. The temperature is maintained constant. The volume increases by a series of small steps. Before performing the next step for changing the amount of pressure should be stable. To reduce the time required to stabilize the pressure fluid is actively mixed. Such mixing typically involves mixing, stirring, shear, vibration, and/or other moving volume of fluid. During the process or steps increase use optical technology to determine the presence of separate phases. For example, the high-pressure chamber with 2 micron resolution can be used to obtain images through the optical window, and can be made by measuring the absorption of light using near infrared region of the spectrum.

During the capture ol the b fluid reservoir may exhibit a variety of phase transitions. Often these transitions are the result of cooling, the pressure drop and/or changes in composition that occur when the fluid is extracted in the tool and/or retrieved to the surface. The characterization of the phase behavior of a fluid is the key when planning and optimization of development and production fields. Temperature change (T) and pressure (P) of the fluid formation often involves multi-phase separation (e.g., liquid-vapor, liquid-solid, liquid-liquid, vapor-liquid and so on) and the recombination phase. Similarly, a single-phase gas typically has an envelope, which separates the liquid phase, known as the condensation point. These changes may interfere with the measurements carried out during the evaluation of the formation. Moreover, there is a significant time delay between sampling and testing on surface or in third-party laboratories.

It is therefore desirable to develop technologies capable of evaluating fluid formation. Additionally, it is desirable that such technology has provided accurate measurements in real-time. This assessment formations may need to work with dimensional and temporal restrictions on operations in the well bore and preferably be performed in the well. Such a device for analyzing a fluid capable of carrying out such assessment form the tion, created by the present invention.

At least in one aspect the present invention relates to a device for analyzing a fluid. This device includes a test chamber adapted to move fluid discharge node and at least one sensor. The test chamber forms an evaluation cavity for receiving fluid. A device for moving fluid has a power tool, applied force to the fluid, causing the fluid to move within the cavity. Injection site continually changes the pressure of the fluid. At least one sensor communicates with the fluid to determine at least one parameter of the fluid during continuous change of pressure fluid.

In one embodiment, the test chamber is designed as a channel, such as loop recycling. In another embodiment, the test cell includes a channel, loop loop chamber connected to the channel and forming the estimated cavity, and at least one valve disposed between the channel and the evaluation cavity of the bypass loop to selectively drain fluid in the evaluation cavity of the bypass loop of the channel.

In yet another embodiment, a device for moving fluid includes a pump. Optionally, the device for moving fluid includes a mixing element is, situated in the evaluation cavity and forming in fluid turbulence. In this embodiment, at least one sensor is preferably located inside the vortex.

In yet another embodiment, a device for moving fluid and the discharge module is made as a unit and together contain the first housing, second housing, the first piston and the second piston. The first housing forms a first cavity, a chamber connected with the evaluation cavity of the test chamber. The second housing forms a second cavity chamber connected with the evaluation cavity of the test chamber. The first cavity has a cross sectional area greater than the cross-sectional area of the second cavity. The first piston positioned in the first cavity and can be moved in the first cavity. A second piston located in the second cavity and can be moved in the second cavity. Moving the first and second pistons are synchronized for simultaneous movement of fluid and pressure changes in a test cell.

In the embodiment designed to detect changes of the phases of the fluid, at least one sensor preferably includes a pressure sensor, temperature sensor, sensor boiling point. The pressure sensor reads the pressure readings within the evaluation cavity of the test chamber. The temperature sensor sityva is t the temperature of the fluid within the evaluation cavity of the test chamber. Sensor boiling point detects the formation of bubbles within the fluid.

In another aspect, the present invention relates to a downhole tool disposed in the wellbore having a wall and held in an underground formation. The formation contains fluid. The downhole tool includes a housing, a device for communication with a fluid and a device for analyzing a fluid. Device for communication with a fluid capable of moving out of the housing to ensure a tight contact with the wall of the wellbore. Device for communication with the fluid has at least one inlet for receiving fluid from the formation. Device for analyzing fluid is located inside the housing. This device includes a test chamber, a device for moving fluid, the discharge node and at least one sensor. The test chamber forms an evaluation cavity for receiving fluid from the device for communication with a fluid. A device for moving fluid has a power tool, applied force to the fluid, causing the fluid to move within the cavity. Injection site changes the pressure of the fluid. At least one sensor communicates with the fluid to determine at least one parameter of the fluid. Device for analysis of the fluid can be any of the above variations is tov its implementation.

In one embodiment, the device for communication with a fluid includes at least two inlet openings, with one of the inlet holes accepts clean fluid from the formation. In this embodiment, the downhole tool further comprises a channel, the receiving clean fluid from one of the inlet ports of the device for communication with fluid, and delivers the clean fluid in the evaluation cavity.

The present invention also relates to a method for measuring parameters of an unknown fluid inside the wellbore flowing in formations containing fluid. In this way the device for communication with the fluid downhole tool is in tight contact with the wall of the wellbore. The fluid extracted from the formation in the evaluation cavity within the downhole tool and moves within the evaluation cavity, when this data is collected until the fluid moves within the evaluation cavity.

In one embodiment of the method the pressure within the evaluation cavity is continuously changed during the data collection.

In another embodiment, the method boiling point of the fluid is determined based on the collected data.

In yet another embodiment, the method of valuation cavity is formed as air loop from the main channel, and the method further comprises e is the APA's removal of fluid from the main channel in a separate evaluation cavity, circulation allotted fluid within individual assessment cavity, and collect data about the designated fluid within individual assessment cavity during the circulation of a given fluid.

In an additional embodiment, the fluid located in a separate evaluation cavities, can be mixed and then mixed fluid can be recycled. Then, data is collected on a mixed fluid during recirculation of the mixed fluid.

In one aspect, a device for communication with the fluid is a double seal and unknown fluid is a clear fluid.

So that the foregoing characteristics and advantages of the present invention can be understood in detail, more particular description of the invention summarized above, may serve to refer to variations in its implementation, which is illustrated in the accompanying drawings. However, it should be noted that the appended drawings illustrate only typical embodiments of this invention and therefore can not be considered as limiting their scope, and that the invention allowed other, equally effective ways of implementation.

Figure 1 is a schematic view in partial cross-section of the downhole tool having a device for analyzing fluid and lowered into the borehole with the drilling of the mouth of the hall.

Figure 2 is a schematic view in partial cross-section of the downhole drilling tool having a device for analyzing fluid and lowered into the borehole with a drilling rig.

Figure 3 is a schematic view of the portion of the downhole tool shown in figure 1, with the probe positioned opposite the side wall of the wellbore and the estimated channel device for analysis of a fluid which is connected with an internal channel that delivers the fluid to the formation of the probe.

Figure 4 is a schematic view of the portion of another version of the implementation of the downhole tool shown in figure 1, with the probe positioned opposite the side wall of the wellbore, and the estimated channel device for analysis of a fluid which is connected with an internal channel that delivers the fluid to the formation of the probe.

Figa is a schematic diagram of a portion of another variant implementation of the downhole tool shown in figure 1, with the probe positioned opposite the side wall of the wellbore, and the estimated channel device for analysis of a fluid which is connected with an internal channel that delivers the fluid to the formation of the probe.

FIGU is a schematic view of the downhole tool shown in figa showing the movement of fluid formation within the evaluation to the channel.

6 is a schematic diagram of a portion of another variant implementation of the downhole tool shown in figure 1, with the probe positioned opposite the side wall of the wellbore, and the estimated channel device for analysis of a fluid which is connected with an internal channel that delivers the fluid to the formation of the probe.

7 is a schematic diagram of a portion of another variant implementation of the downhole tool shown in figure 1, with dual probe, positioned opposite the lateral wall of the borehole, and the estimated channel device for analysis of a fluid which is connected with an internal channel that delivers the fluid to the formation of the probe.

Some of the terms defined in this description when you first use them, while some others used in this description, the terms defined below.

"Annular" means, relates to or forms a ring, i.e. a line, tape, or accommodation in the form of a closed curve such as a circle or an ellipse.

"Contaminated fluid" means a fluid, which is usually unacceptable for sampling hydrocarbon fluid and/or evaluation because the fluid contains pollutants, such as filtrate from the drilling mud used in drilling wells.

"Downhole tool" means instruments that are placed in the wellbore p is the tool of the drill string, rope, or coil tubing to perform downhole operations related to the production and/or management of one or more investigational underground formations.

"Operatively connected" means directly or indirectly connected to transmit or conduct information, effort, energy, or substances (including fluids).

"Clean fluid" means an underground fluid, which is pretty clean, original, natural, uncontaminated or in any other manner deemed in the field sampling and analysis acceptable way of representing this information for correct sampling or assessment of hydrocarbon.

"Fluid" means "clean fluid" and "dirty fluid".

"Continuous" means marked by uninterrupted interval of time, space or sequence.

Preferred embodiments of the invention shown in the above drawings and discussed in detail below. In the description of the preferred embodiments, like or same reference 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 scaled up or schematically for the best clarity and expressiveness.

Figure 1 depicts the wells of the first tool 10, designed in accordance with the present invention, is lowered from the drilling rig 12 into the wellbore 14 wells. The downhole tool 10 can be a tool of any type capable of performing formation evaluation, such as drilling tools, coiled tubing or other downhole tool. The downhole tool 10 is a common tool spokeman with a drilling rig 12 into the wellbore 14 wells with rope cable 16 and located close to the formation F. the Example of the descent on the rope of a tool that can be used are described in U.S. patent No. 4860581 and 4936139.

The downhole tool 10 is equipped with a probe 18, adapted to provide a tight connection with the wall 20 of the barrel 14 wells (hereinafter referred to as "wall 20" or "the wall 20 of the wellbore) and the extraction fluid their formation F into the downhole tool 10, as indicated by the arrows. Auxiliary pistons 22 and 24 facilitate the pushing of the probe 18 of the downhole tool relative to the wall 20 of the wellbore. The downhole tool 10 is also provided with a device 26 for analysis of fluid constructed in accordance with the present invention for analyzing a fluid formation. In particular, the device 26 capable of performing formation evaluation and/or analysis of downhole fluids, such as fluids of the formation F. the Unit 26 accepts the formation fluid from the Honda 18 through the estimated channel 46.

Figure 2 depicts another variant of the downhole tool 30, constructed in accordance with the present invention. The downhole tool 30 is a drilling tool, which can be moved among one or more (or maybe himself) drilling tools for measurement while drilling, drilling tools, logging while drilling, or other drilling tool, which is known to specialists in this field of technology. The downhole tool 30 is attached to the drill string 32, driven drilling rig 12 for the formation of the barrel 14 hole. The downhole tool 30 includes a probe 18a adapted for tight connection with the wall 20 of the barrel 14 wells to extract fluid their formation F in the downhole tool 30, as indicated by the arrows. The downhole tool 30 is also provided with a device 26 for analyzing formation fluid extracted in the downhole tool 30. The device 26 receives the formation fluid from the probe 18a through the channel 46.

While figure 1 and figure 2 depict a device 26 for analysis of fluid into the downhole device, should be taken into account that such a device can be provided on the rig floor or other equipment to perform the test fluid. By placing device 26 for analysis of the fluid in the borehole, data skvazhina the fluid can be collected in real-time. However, it also may be desirable and/or necessary to test the fluids on the surface or elsewhere. In these cases, the device for analysis of fluid can be accommodated in the housing moved to the desired location. Alternatively, samples can be delivered to the surface or another location and tested in the module analysis of the fluid in this place. Data and test results from different locations can be analyzed and compared.

Figure 3 is a schematic view of part of the downhole tool 10 depicted in figure 1, depicting the system 34 of the flow of fluid. The probe 18 preferably extends from the housing 35 of the downhole tool 10 for contact with the wall 20 of the wellbore. The probe 18 is equipped with a seal 36 to ensure tight contact with the wall 20 of the wellbore. The seal 36 is in contact with the wall 20 of the wellbore and forms a tight contact with the filtration crust 40 mud covering the barrel 14 hole. Filtration cork 40 seeps into the wall 20 of the wellbore and creates the zone 42 of penetration around the trunk 14 of the well. Area 42 penetration contains drilling mud and other fluids to the surface of the wellbore, which pollute the surrounding formation, including the formation F and a portion of the clean fluid 44 contained therein.

System 34 of the flow of fluid includes estimated the 46 anal, passing from the inlet of the probe 18. While the probe is depicted for the extraction of fluid into the downhole tool, other devices for communication with the fluid can be used. Examples of devices for communication with a fluid, such as probes and double seals used to extract fluid in the channel is shown in U.S. patent No. 4860581 and 4936139.

The estimated channel 46 is held in the downhole tool 10 and is used for transmission of fluid, such as pure fluid 44 in the downhole tool 10 for preliminary testing, analysis and/or sampling. The estimated channel 46 is held in a selected chamber 50 for collecting samples of pure fluid 44. System 34 of the flow of fluid can also include a pump 52 that is used for the transmission of fluid through the channel 46.

While figure 3 shows a sample configuration of the downhole tool used to extract fluid from the formation, should be taken into consideration by an expert in the field of technology that can be used in many configurations of channels, pumps, selected chambers, valves, and other devices, and that it is not intended to limit the scope of the invention.

As discussed above, the downhole device 10 provided with a device 26 for analysis of fluid formation. In particular, the device 26 is able to perform well is serenia, such as phase measurements, viscosity and/or density of the formation fluid. In General, the device 26 for analysis of fluid supplied test chamber 60, the device 62 to move the fluid injection node 64 and one or more sensors 66 (multiple sensors shown in figure 4, 5A, 5B, 6 and 7 and are numbered for clarity, the reference positions 66a-g).

The test chamber 60 forms the evaluation cavity 68 for receiving fluid formation. It should be understood that the test cell 60 may have any configuration capable of receiving fluid formation and allows the movement of fluid, as discussed here, so that could be performed measurements. For example, as shown in figure 3, the test cell 60 may be implemented as a bypass channel which is connected with the estimated channel 46, so that the formation fluids may be placed or disposed in the bypass channel. The device 26 for analysis of the fluid can also be provided with a first valve 70, the second valve 72, the third valve 74 for selective removal of formation fluid into and out of the test chamber 60, as well as to isolate the test chamber 60 of the estimated channel 60.

As shown, for removal of formation fluid in the test chamber 60, the first valve 70 and the second valve 72 are opened, while the third valve 74 is closed. This removes fluid formation in the pilot of the second chamber 60, while the pump 52 moves the fluid formation. Then the first valve 70 and the second valve 72 is closed to isolate or lock fluid formation within the test chamber 60. If desirable, the third valve 74 can be opened for normal assumptions or other downhole tool 10. For example, the valve 74 may be opened and the valves 70 and 72 are closed during the evaluation of the fluid in the test chamber 60. Additional valves and channels or the test cell can be added on request to facilitate the flow of fluid.

The fixture 62 for moving fluid is used to move and/or mixing of the fluid within the evaluation cavity 68 to improve the homogeneity, cavitation and circulation of the fluid. The fluid is preferably moved through the evaluation cavity 68 to improve the accuracy of measurements obtained from the sensor or sensors 66. In General, a device 62 for moving fluid has a power tool, applied force to the formation fluid to force the fluid formation recycling within the evaluation cavity 68.

Device 62 may be a device of any type capable of applying force to the formation fluid to force the fluid formation recycling, and, optionally, mixed in the evaluation cavity 68. The fixture 62 move fluid makes recycling fluorescence is ID formations in the test chamber 60 by the sensor or sensors 66. The device 62 of the moving fluid may be a pump or any type of device capable of force to circulate the fluid formation in the test chamber 60. For example, the device 62 to move the fluid may be a reciprocating positive-displacement pump such as a gear pump, kolovraty pump, screw pump, centrifugal pump, peristaltic pump or a piston and a screw pump.

When the device 62 mixes the fluid, one of the sensors 66 (usually defined as the sensor light absorption) can be placed directly against the discharge side of the fixture 62 to be in the vortex formed by the fixture 62. The sensor 66 may be a sensor of any type capable of measuring parameters of a fluid, such as a sensor or device carrying out measurement of light absorption.

Preferably the injection site 64 changes the pressure of the formation fluid in the test chamber 60 continuously. The discharge node 64 may be any device type that can communicate with the test chamber 60 and continuously changing (and/or step change) volume or pressure of the formation fluid in the test chamber 60. In a variant, shown in figure 3, the discharge node 64 is equipped with a hyperbaric chamber 82, the housing 84, the piston 86 and the tool 88 control the movement of the piston. The piston 86 with abien outer surface 90, which interacts with the housing 84 to define a decompression chamber 82. The tool 88 control the movement of the piston controls the position of the piston 86 in the housing 84 for effective changes in the volume of the decompression chamber 82.

As changes in the volume of the decompression chamber 82 volume or pressure in the test chamber 60 also changes. Thus, increasing decompression chamber 82, the pressure in the test chamber 60 is reduced. Similarly, decreasing decompression chamber 82, the pressure in the test chamber 60 increases. The tool 88 control the movement of the piston may be electronic and/or mechanical means of any type capable of changing the position of the piston 86. For example, the tool 88 control the movement of the piston may be a pump, the force exerted by the fluid on the piston 86, or motor, movably connected to the piston 86 through a mechanical connection, such as a pin, flange or threaded screw.

The sensor 66 may be any type of device capable of receiving information, which is useful in the determination of fluid properties, such as phase behavior of fluid formation. Although only one sensor 66 shown in figure 3, the device 26 for analysis of the fluid can be supplied by more than one sensor 66, as shown, for example, figure 6 and 7. The sensor 66 which may be for example, a pressure sensor, a temperature sensor, a density sensor, a viscosity sensor, a camera, a photosensitive element, a sensor in the near-infrared to acquire spectrum. Preferably, at least one of the sensors 66 is used to measure light absorption. In this example, the sensor 66 may be placed against the window (not shown), so that the sensor 66 can see or carry out the determination according to the phase change fluid formation. For example, the sensor 66 may be a video camera, which may allow a single observation of the formation fluid, or make an image of the formation fluid flowing past the window, so that the images can be analysed for the presence of bubbles or other signs of status change phase fluid formation.

The device 26 for analysis of fluid is also supplied with a signal processor 94, connected to the device 62 to move the fluid, the sensor(s) 66, and a means 88 control the movement of the piston. The signal processor 94 preferably controls the tool 88 control the movement of the piston and the device 62 to move the formation fluid in the test chamber 60. The processor may continuously change the pressure of the formation fluid in a predictable way. Although the signal processor 94 described here, as the only change is in store pressure in the test chamber 60 continuously, it should be understood that the signal processor 94 is adapted to change the pressure in the test chamber 60 in any predetermined way. For example, the signal processor 94 may control means 88 control the movement of the piston continuously, stepwise or combined. The signal processor 94 also serves to collect and/or data manipulation, issued by the sensor or sensors 66.

The signal processor 94 may communicate with device 62 of the moving fluid, the sensor(s) 66 and/or means 88 control the movement of the piston by any suitable communication link, infrared communication links, microwave links or similar. Despite the fact that the signal processor is illustrated as being in the housing 35 of the downhole tool 10, it should be understood that the signal processor 94 may be provided remotely relative to the downhole tool 10. For example, the signal processor 94 may be provided in the control station, located on the rig floor or located remotely relative to the drilling site. The signal processor 94 includes one or more electronic or optical device capable of performing logic for implementing the control device 62 of the moving fluid, and means 88 control the movement of the piston, as well as to gather information from Yes the chick(s) 66, as described here. The signal processor 94 may also communicate with and control the first valve 70, the second valve 72 and the third valve 74 to selectively divert fluid to and from the evaluation cavity 68, as discussed above. For clarity, the lines showing the relationship between the signal processor 94 and the first valve 70, the second valve 72 and the third valve 74 in figure 3 have been omitted.

Used by the processor 94 may be used to selectively actuate the valves 70, 72 and/or 74 to exhaust fluid formation in the test chamber 60, as discussed above. The signal processor 94 may close valves 70 and 72 to isolate or locking of the formation fluid in the test chamber 60. The signal processor 94 may then be actuated device 62 to move the fluid to move the fluid formation in the test chamber 60 in the recirculation mode. As shown in figure 3, this forms a recirculation loop, which passes through the discharge node 64, the sensor 66 and the device 62 of the moving fluid. This loop is formed from a number of channels, are combined in the channel for movement of fluid for forming a loop of thread. In small spaces, such as the downhole device, the fluid usually travels through the narrow channels. Mixing in such narrow channels usually difficult. The fluid, therefore, the CID is aliroot in the loop to improve the mixing of the fluid, as it passes through narrow channels. Such mixing may also be desirable in other applications that do not include narrow channels.

The signal processor 94 actuates the tool 88 motion control valve to start the change of pressure in the test chamber 60 in a predictable way. In one example, the signal processor 94 actuates the tool 88 motion control valve for continuous decrease the pressure of the formation fluid in the test chamber 60 at a speed suitable for carrying out phase measurements in a short time, sometimes less than 15 minutes. While the test chamber 60 pressure continuously decreases, the signal processor 94 collects data from the sensor or sensors 66 are preferred for measuring light absorption (i.e. dispersion), while also controlling the pressure in the test chamber 60 to provide an accurate measurement of the phase behavior of a fluid formation.

The downhole tool 10 is also provided with a fourth valve 96 to selectively divert fluid formation in the selected chamber 50, or in the barrel 14 hole through the return channel 98. The downhole tool 10 may also be equipped with an output port 99, slide out from the rear part of the selected camera 50.

It should be understood that the device 26 for analysis of the fluid can be COI is used in different ways in downhole tools 10 and 30. The above description relative to the injection device 26 for analysis of fluid into the downhole tool 10 is equally applicable to the downhole tool 30. Additionally, various modifications of the downhole tools 10 and 30 of the device 26 for analysis of fluid treated using the present invention. Many of these modifications will be described below relative to the downhole tool 10. However, it should be understood that these modifications are equally applicable to the downhole tool 30.

It should be understood that measurement of the phase behavior are not the only measurements that can be made, and because it is likely that the determination of the phase boundaries is more sensitive to mixing, it is also desirable for accurate measurements, such as density in multicomponent mixtures and also for viscosity. Indeed, measurements can be performed with a continuous or step-by-step decompression. Step-by-step case, the additional mode of operation becomes possible by performing the pressure reduction to the boundary phase twice with the same breakdown or preferably with a certain part of the fresh fluid from the channel. If it is adapted to the discrete steps of pressure, the first pressure decrease with a constant pressure drop leads is a rough estimate of the pressure of the phase boundaries. A rough estimate can be used in the second cycle of pressure reduction with logarithmically decreasing the size of the steps used to reduce pressure, for example the magnitude of the decrease in pressure decreases logarithmically (or some other mathematical method, in which the magnitude of the decrease in pressure decreases) with decreasing pressure at the aspiration pressure to the estimation obtained at the first measurement. When the pressure is below the estimated step size pressure increases with decreasing pressure. This procedure can give a more precise answer.

Temperature and substantially lower pressure in the downhole tool 10 or 30 can be unequal temperature and pressure in the tank F. To obtain estimates in the desired state from the values measured under the conditions of the downhole tool 10 or 30, preferably including the assessment of the temperature and pressure of the reservoir and the properties change with changing temperature and pressure, these values are combined with a model that can be extrapolated from a set of temperatures and pressures the other set. Thus, the measurement should be done in this area and during the change of zone or retrieval of the downhole tool 10 or 30, so that the desired deflection can be measured and then combined with the equation of state.

Hereinafter will be described in F. g-7. For simplicity, figure 4-7 signal processor 94 and the corresponding connection lines are not shown.

Figure 4 shows the downhole tool 10a, which is similar in structure and function of the downhole tool 10 described above with reference to figure 3, except that the downhole tool 10a has two devices 26 for analysis of the fluid. The advantage of having multiple devices 26 for analysis of fluid allows the downhole tool 10a to receive a few samples of formation fluid and to test them at the same time or periodically. This allows to compare the results of samples, providing better precision downhole measurements. Although only two devices 26 for analysis of fluid shown in figure 4, it should be understood that the downhole tool 10a may be provided with any number of devices 26, which are located at different places of the downhole tool. In the variant shown in figure 4, each device 26 is selectively communicated with the estimated channel 46. It should also be understood that the device 26 for analysis of the fluid can work independently and/or be used on independent channels.

On figa and 5B shows the downhole tool 10b, which is similar in structure and function of the downhole tool 10 described above with reference to figure 3, except that the downhole tool 10b in the pump Assembly 180, which combines the functions of the devices 62 moving fluid and injection site 64, is shown in figure 3. Figa shows the downhole tool 10b pumping node in the upper position, figv shows the downhole tool 10b pumping node in the lower position. The pump Assembly 180 is supplied with the first vessel 182, the second vessel 184, piston node 186 and source 188 driving force.

Piston Assembly 186 includes a first body 192, movably placed in the first vessel 182 for the formation of the first chamber 193 communicating with the evaluation cavity 68. Piston Assembly 186 also includes a second body 194, movably placed in the second vessel 184 for the formation of the second chamber 196 communicating with the evaluation cavity 68. Figa and 5B illustrate the movement of the first and second bodies 192 and 194.

Source 188 driving force moves the first and second body 192 and 194 of the piston 186 so that the formation fluid received in the test chamber 60, is given by sensors 66a-e, and between the first and second chambers 193 and 196 as changes in the relative positions of the first and second bodies 192 and 194. To change the pressure during the movement of the first and second bodies 192 and 194 of the first chamber 193 has a diameter A and the second chamber 196 has a diameter b Diameter B is preferably smaller than the diameter of A. Since the first and second chambers 193 and 196 are of different diameters, the United the first volume of the first chamber 193, the second chamber 196 and the estimated cavity 68 change as the movement of the first and second bodies 192 and 194.

Source 188 driving force simultaneously moves the first and second body 192 and 194 in the first direction 200, as shown in figv to force fluid formation F to move from the second chamber 196 in the first chamber 193 by sensors 66a-e during the pressure reduction in the estimated cavity 68. For example, if during a move to a distance (ds) is the first body 192 in the first chamber 193 draws approximately 5 cm3fluid and the second body 194 in the second chamber 196 pushes approximately 4.8 cm3fluid, there will be a net increase of approximately 0.2 cm3, while approximately 4.8 cm3fluid formation F is moved past the sensors 66a-e.

Source 188 of the driving force can be any device or devices capable of moving the first body 192 and a second body 194. For example, the piston Assembly 186 may include a drive screw 202 connected to the first body 192 and the second body 194. Source 188 of the driving force can result in the movement of the drive screw 202 by a motor 204, mechanically connected to the drive nut 206 located on the drive screw 202. Alternatively, the pump can return to its original position or to control the location of the piston 186.

Figure 6 shows the downhole tool 10c, the which is similar in structure and function of the downhole tool 10a, described above with reference to figure 4, except that the downhole tool 10c is additionally equipped with one or more isolation valves 220 and 222. The downhole device 10c is provided with two or more devices 26 for analysis of the fluid. As discussed above with reference to figure 4, the advantage of having multiple devices 26 for analysis of fluid allows the downhole tool 10a or 10c to obtain several samples of formation fluid and test samples simultaneously and periodically. This allows to compare the results of samples to ensure the best precision downhole measurements.

With the addition of insulation valves 220 and 222 connecting the test chamber 60 one device 26 for analysis of fluid from the test chamber 60 other device 26 for analyzing a fluid, the downhole tool allows isolation valves 220 and 222 to be open to mix samples, separately received in the two devices 26 for analysis of the fluid. Isolation valves 220 and 222 can then be closed and mixed formation fluids separately tested devices 26 for analysis of the fluid.

Shown in Fig.7 is downhole tool 10d, which is similar in structure and function of the downhole tool 10a described above with reference to figure 4, except that the downhole tool 10d to omnitele equipped with a probe 230, with the channel 232 cleaning in addition to the estimated channel 46, and one of the devices 26 for analysis of fluid connected to the channel 232 cleaning. The downhole tool 10d is also equipped with a pump 234 connected to the channel 232 purification to extract the contaminated fluid from the formation and removal of contaminated fluid into the device 26 for analysis of the fluid.

The device 26 may be used to analyze the fluid for the evaluation and treatment of the channels 46 and 232. Information obtained from the device 26 for analysis of the fluid can be used to determine such information as the pollution levels. As shown, the estimated channel 46 is connected to the selected camera 50, so that the sample fluid can be selected. This sampling usually occurs when pollution levels are falling below acceptable levels. Channel 232 cleaning depicted as connected with the barrel 14 wells for discharge of fluid from the tool 10d. Not necessarily, different valve fittings can be provided to selectively divert fluid from one or more channels, optionally in the selected camera or into the well.

While the above downhole tools shown as having probes for extracting fluid into the downhole tool, a specialist in the art must take into account that can be used by other device to retrieve f is wide in the downhole tool. For example, double seals can be radially located near the inlet of one or more channels for insulation between the top of the shaft 14 wells and extraction fluid into the downhole tool.

Additionally, while the device 26 for analysis of fluid has been shown and described herein in combination with downhole tools 10, 10a, 10b, 10c, 10d and 30, it should be understood that it can be used in other conditions, such as setting a portable laboratory or furnished stationary laboratory.

It should be understood from the preceding description that various modifications and changes may be made in the preferred and alternative embodiments of implementation of the present invention without going beyond its essence.

The present description is intended for illustration only and should not be construed in a restrictive sense. Scope of this invention should be defined only in the language of the accompanying claims. The term "comprising" in the claims should be understood as including, at least, so the above list of elements in the claims is an open group. Indefinite articles and other forms of the singular are intended to include their plural forms, unless they are specifically clucene.

1. A device for analyzing a fluid containing the test chamber, forming an evaluation cavity for receiving fluid, a device for moving fluid having a power tool that does force to the fluid to move the fluid in the cavity, the injection site, modifying the pressure of the fluid in a continuous manner, and at least one sensor communicating with the fluid to determine at least one parameter of the fluid at constant pressure change of the fluid.

2. The device according to claim 1, in which the test cell is a channel.

3. The device according to claim 2, in which the evaluation cavity of the channel is configured as a loop recycling.

4. The device according to claim 1, wherein the test cell contains a channel, loop loop chamber connected to the channel and forming the estimated cavity, and at least one valve disposed between the channel and the evaluation cavity of the bypass loop for selective diversion of the fluid in the evaluation cavity of the bypass loop of the channel.

5. The device according to claim 1, wherein the device for moving fluid is a pump.

6. The device according to claim 1, wherein the device for moving fluid includes a mixing element located in the evaluation cavity and forming a vortex in the fluid, and the sensor is located in a whirlwind.

7. The device according to claim 1, in which the device DL is the displacement fluid and the injection unit is designed as a single unit, and together contain the first housing forming a first cavity, a chamber connected with the evaluation cavity of the test cell, the second housing forming a second cavity chamber connected with the evaluation cavity of the test cell, the first cavity has a cross sectional area greater than the cross-sectional area of the second cavity, the first piston located in the first cavity and capable of moving in the first cavity, and a second piston located in the second cavity and capable of moving in the second cavity, and moving the first and second pistons are synchronized for simultaneous movement of fluid and pressure changes in a test cell.

8. The device according to claim 1, in which at least one sensor includes a pressure sensor for sensing pressure in the evaluation cavity of the test cell, a temperature sensor for sensing temperature of the fluid is estimated cavity, the sensor boiling point for detecting air bubbles in the fluid.

9. The downhole tool disposed in the wellbore having a wall and held in an underground formation with a fluid, comprising a housing, a device for communication with fluid, sliding out of the case for the implementation of tight contact with the wall of the borehole and having at least one inlet for receiving flew the Yes from the formation;
device for analysis of the fluid accommodated in the housing and containing the test chamber, forming an evaluation cavity for receiving fluid from the device for communication with a fluid; a device for moving fluid with the power tool, applied force to the fluid to move in the cavity, the injection site, modifying the pressure of the fluid in a continuous manner, and at least one sensor communicating with the fluid to determine at least one parameter of the fluid.

10. The downhole tool according to claim 9, in which the injection site changes the pressure of the fluid in a continuous manner, and at least one sensor capable of determining at least one parameter of the fluid at constant pressure change of the fluid.

11. The downhole tool according to claim 9, in which the test cell is a channel.

12. The downhole tool according to claim 11, in which the evaluation cavity of the channel is configured as a loop recycling.

13. The downhole tool according to claim 9, in which the test cell contains a channel, the first loop the loop chamber connected to the channel, and forming the estimated cavity, and at least one valve disposed between the channel and the evaluation cavity of the first bypass loop for selective diversion of the fluid in the evaluation cavity of the bypass loop of the channel.

14. The downhole tool is the side indicated in paragraph 13 in which the test cell further comprises a second loop loop chamber connected to the channel and forming a separate evaluation cavity.

15. The downhole tool according to item 13, further containing a means for mixing the fluid from the evaluation of the cavities formed by the first and second side hinges.

16. The downhole tool according to claim 9, in which the device for moving fluid includes a pump.

17. The downhole tool according to claim 9, in which the device for moving fluid includes a mixing element located in the evaluation cavity and forming a vortex in the fluid, and the sensor is located in a whirlwind.

18. The downhole tool according to claim 9, in which the device for moving fluid and injection unit is designed as a single unit, and together contain the first housing forming a first cavity, a chamber connected with the evaluation cavity of the test cell, the second housing forming a second cavity chamber connected with the evaluation cavity of the test cell, the first cavity has a cross sectional area greater than the cross-sectional area of the second cavity, the first piston located in the first cavity and capable of moving in the first cavity, and a second piston located in the second cavity and capable of moving in the second cavity, and moving the first and the WTO is wow synchronized pistons for simultaneous movement of fluid and pressure changes in a test cell.

19. The downhole tool according to claim 9, in which at least one sensor includes a pressure sensor for sensing pressure in the evaluation cavity of the test cell, a temperature sensor for sensing temperature of the fluid appraisal of the cavity and the sensor boiling point for detecting air bubbles in the fluid.

20. The downhole tool according to claim 9, in which the device for communication with a fluid includes at least two inlet openings, one of which is intended to receive the clean fluid from the formation, and there is also a channel that accepts clean fluid from one of the inlet ports of the device for communication with a fluid and delivering clean fluid in the evaluation cavity.

21. The method for measuring the parameter of the unknown fluid in the wellbore, passing in formation with a fluid, containing the following steps:
accommodation device for communication with the fluid downhole tool in tight contact with the wall of the wellbore;
removing fluid from the formation and in the evaluation cavity in the downhole tool;
the movement of the fluid in the evaluation cavity; and
the collection of data on fluid when moving the fluid in the evaluation cavity.

22. The method according to item 21, further containing the step of continuous change of pressure in the evaluation cavity during data collection.

23. The method according to item 22, the stage is niteline containing the step of determining the boiling point of the fluid based on the collected data.

24. The method according to item 21, in which the estimated cavity formed additionally as air loop from the main channel, and additionally carry out the following steps:
discharge of fluid from the main channel in a separate evaluation cavity;
ensuring the circulation of a given fluid in a separate evaluation cavity;
collecting data about the designated fluid in a separate evaluation of the cavity during its circulation.

25. The method according to paragraph 24, further comprising stages of mixing fluids in the evaluation cavity and a separate evaluation of the cavity, the circulation of the mixed fluid and data collection a mixed fluid during its circulation.

26. The method according to item 21, in which the device for communication with the fluid is a double seal, and the unknown fluid is a clear fluid.

27. The downhole tool disposed in the wellbore having a wall and held in an underground formation with a fluid, comprising a housing, a device for communication with fluid, sliding out of the case for the implementation of tight contact with the wall of the borehole and having at least one inlet for receiving fluid from the formation, the device for analyzing fluid accommodated in the housing and containing the test chamber, forming the estimated cavity, configured as a recirculation loop, for receiving fluid is C devices for communication with the fluid a device for moving fluid with the power tool, applied force to the fluid for recirculation in the recirculation loop, injection site, modifying the pressure of the fluid, and at least one sensor communicating with the fluid to determine at least one parameter of the fluid.



 

Same patents:

The invention relates to a method and system for measuring two-phase flow mixture liquid/liquid or liquid/gas phase or three-phase mixture of liquid/liquid/gas flowing through operational or transport pipeline

FIELD: engines and pumps.

SUBSTANCE: method involves introduction of common flexible tubing string to the well bore with annular space formed around flexible tubing string; activation of the device for separation of zones for isolation at least of one well bore zone; direction of test fluid medium to well bore through flexible tubing string to location place above the aforesaid zone; removal of outlet fluid medium from isolated zone and test fluid medium from flexible tubing string through annular space; measurement of characteristic of flow rate and pressure of outlet fluid medium during discharge.

EFFECT: isolation and test of separate zones without removing operating tubing string.

20 cl, 15 dwg

FIELD: oil and gas industry.

SUBSTANCE: for this method, containing method of sample sampling of fluid in point of sampling, analysis of physical and chemical properties of fluid sample in sampling point, recordings of sample properties in point of sampling into archive of electronic data base, analysis of physical and chemical properties of sample of fluid in place remote from point of sampling, recording of sample properties in remote place into archive, checking of fluid sample fitness be means of comparison of properties in point of sampling and sample properties in remote place and recording of properties of checked for fitness of sample into archive.

EFFECT: providing of method of reliable and qualitative sample of fluid and improvement of data quality, controllability and conformity of data about fluids parametres.

32 cl, 4 dwg

FIELD: measuring equipment.

SUBSTANCE: invention is related to hydrodynamic research of oil and gas wells, and may be used to study physical properties of their layers. Device comprises implosion chamber, packer module, moisture gauge, resistivity metre, sampler, module of samplers, slide valve unit, additional pressure sensor arranged over packer module. Besides slide valve unit is equipped with valves and installed over module of samplers with the possibility to switch flow of samples over to implosion chamber arranged in upper part of device, and to module of samplers through sampler, which comprises differential pistons, and sampler and implosion chamber are connected to well bore zone via vertical channel, where moisture metre, resistivity metre, sensor of layer pressure and temperature sensor are installed.

EFFECT: improved accuracy of research of hydrodynamic characteristics of oil and gas wells and improved quality of formation fluid samples at various depth due to elimination of well fluid effect at results of samples analysis and taking.

3 cl, 3 dwg

FIELD: oil and gas production.

SUBSTANCE: invention is related to oil production industry and is intended to assess parametres of underground bed, having primary fluid and contaminated fluid. In order to produce fluids from bed, fluid is extracted into at least two inlet holes. At least one assessment diverting line is connected by fluid with at least one of inlet holes for movement of primary fluid into well instrument. At least one cleaning diverting line is connected by fluid with inlet holes for passage of contaminated fluid into well instrument. At least one circuit of fluid is connected by fluid with assessment diverting line and/or with cleaning diverting line for selective extraction of fluid in it. At least one hydraulic connector is used to selectively pull hydraulic pressure between connecting lines. At least one detector is used to measure well parametres in one of diverting lines. In order to reduce contamination, fluid might be selectively pumped along diverting lines into assessment diverting line.

EFFECT: provision of flexibility and selectivity to control fluid flow through well instrument by detection, reaction and removal of contamination.

23 cl, 30 dwg

FIELD: oil and gas production.

SUBSTANCE: invention is related to oil production industry and is intended for assessment of bed, through which well bore passes. For this purpose method, well tool and bed fluid medium sampling system are developed. Bed fluid medium is extracted from underground bed into well tool and is collected in sampler chamber. Diverting discharge line in working condition is connected to sampler chamber for selective removal of contaminated or clean part of bed fluid medium from sample chamber. As a result contamination is removed from sampler chamber. At the same time clean part of bed fluid medium may be let through another sampler chamber for collection or contaminated part of bed fluid medium may be dropped into well bore.

EFFECT: provision of possibility to remove contaminated fluid medium from well tool and extraction of cleaner fluid medium from underground bed.

38 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: proposed device is intended for fluid medium flowing in min pipe and containing at least selected phase and another phase, and comprises sampling device to sample specimen from fluid medium from multiphase mixture. Proposed device comprises sampling variable-volume chamber to allow gravity-forced disintegration of fluid medium into that enriched by selected phase and fluid medium enriched by at least another one phase. Device incorporates also valve-type manifold that communicates sampling device to sampling chamber to direct fluid medium into said chamber and enriched fluid medium back into main pipe. Proposed method consists of three stages. First stage comprises sampling multiphase fluid medium by connecting one probe to sampling chamber and increasing chamber inner volume to allow gravity-forced fluid medium specimen disintegration into that enriched with selected phase and at least one another fluid medium enriched with useless phase. Second phase comprises draining at least one fluid medium enriched with useless phase back into main pipe by connecting sampling chamber with one probe to reduce chamber inner volume. Then first and second stages are repeated to produce given amount of fluid medium enriched by selected phase in sampling chamber. Third stage consists in forcing aforesaid phase from sampling chamber, connecting the latter to outlet channel and reducing chamber inner volume.

EFFECT: improved operating performances.

16 cl, 2 dwg

FIELD: oil-and-gas production.

SUBSTANCE: sampler, consisting of system of fluid sampling, includes sampling valve and storage of fluid sample, electrohydraulic system. Electrohydraulic system is implemented as logical for fixation and unlock of sampler in well, which includes electric motor, connected to pump, which is connected to the first distributor through return valve, with filter, with safety valve and with the second distributor, connected to valve of sampling and storage of fluid sample, and also to the first, to the second, to the third and to the fourth sensor - pressure limit switch, the first distributor is connected parallel to head end of the first hydraulic ram, of the second hydraulic ram and the third hydraulic ram, stocked cavities of which are connected to third distributors, hydraulic accumulator, to the fifth sensor - pressure limit switch and to the fourth distributor.

EFFECT: reliability enhancement of sampler operation, improvement of automation of sampling and extension of capabilities.

1 dwg

Depth sampler // 2360109

FIELD: mining.

SUBSTANCE: depth sampler consists of ballast chamber, of actuator with module of control, of main and additional sample taking chambers equipped with medium-separating pistons, hydro-resistors and valve units. Each medium-separating piston is equipped with a compensating tube, which connects under-piston cavities of sampling chambers between them. Also hydro-resistor is assembled at the end of each tube.

EFFECT: simplification and upgraded efficiency of operation of units of device, decreased dimensions of sampler, improved quality of separation of taken samples, and validity of measured information.

1 dwg

FIELD: physics, measurements.

SUBSTANCE: proposed set of inventions relates to oil product, particularly, to getting and analysing the samples of in-place fluid medium. The proposed method comprises the steps that follow. First, optical density data on fluid medium sample is obtained for, at least, one-colour channel, water channel or a set of optical channels by measuring wavelength optical density with the help of fluid medium analyszer, and, at least, in one channel of fluid medium component to determined the fluid medium composition or properties with the help of fluid medium downhole sampler furnished with optical pickup. The colour absorption function is defined based on optical data for fluid medium sample in, at least, one colour channel. The part of optical density subject to color absorption, absorption in water in, at least, one aforesaid channel of fluid medium component. The electronic system designed to refine the data on the fluid medium sample incorporates an input device, memory coupled with input device and memory.

EFFECT: accurate data on fluid medium sample resulted from elimination of colour, water and scattering effects.

25 cl, 13 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil-and-gas industry and can be used in analysing fluid dynamics of gas medium at hydrocarbons deposits and subterranean gas storages. The proposed method comprises forcing gas medium indicator marks representing gas-filled micro granules with the dispersion degree of 0.5 to 0.6 µ into the bench through different injection holes and sampling from output holes. Note that indicator mark sampling is realised by forcing gas through sampling tube along with controlling gas passing time and the hole rate of yield, the sampling tube gas flow rate is determined from mathematical expression. The content of micro particles in indicator mark is determined from mathematical expression. The invention covers also the device to embody the above-described method.

EFFECT: continuous sampling, higher sampling efficiency and validity of results.

3 cl, 1 ex, 2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes picking a sample of bed fluid under pressure by means of pump. Sample of fluid is then compressed by moveable piston, actuated by hydrostatic pressure in well through valve. Compressed sample of bed fluid is contained under high pressure inside the chamber with fixed volume for delivery to well surface. Moveable piston is in form of inner and outer bushings, moveable relatively to each other. At the same time several tanks for picking samples from several areas may be lowered into well with minimal time delays. Tanks may be emptied on well surface by evacuation pressure, to constantly provide for keeping of pressure of fluid sample above previously selected pressure.

EFFECT: higher reliability.

6 cl, 14 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow body which is a fragment of force pipeline at vertically placed portion of mouth armature. Tool for controlling flow of multi-component gas-liquid substance is made in form of valve, connected to rotary support. Sample chamber is a ring-shaped hollow in hollow body, placed at same level with valve and connected at inlet to flow of multi-component gas-liquid substance through extracting channels, made on hollow body. Extracting channels are made in form of side slits, positioned symmetrically relatively to valve rotation axis. Ring-shaped hollow on hollow body is connected at outlet to locking tool, mounted at extension of valve shaft and made in form of sample-taking valve. Valve shaft and sample-taking valve are interconnected through hollow intermediate shaft. Sample-taking valve is placed in the body of locking tool with possible reciprocal movement. Valve shaft and hollow intermediate shaft are interconnected with possible mutual rotation for a quarter of one turn.

EFFECT: simplified construction and maintenance, higher quality.

4 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has body in form of calibrated cylinder. From both sides lids are connected to body. Inside the body separating piston and ball for mixing sample are placed. Also provided is hydraulic resistance for slow inlet of sample. Slide valve is used for safe inletting, pressurization and depressurization of taken fluid, is connected to lid and consists of rod with channels and bushing with clamp. Clamp is held between nuts interconnected by threads, one of which is connected to rod by thread. Needle valve consists of locking pin and axle-bearing and is used to drain pressure from closed space above slide valve prior to disconnection of sample-taking container from bed-testing equipment.

EFFECT: simplified construction, higher reliability.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow body mounted in force pipeline, inside of which body tool for controlling flow of multi-component gas-liquid substance is placed, probing chamber with extracting channels, locking tool with handle and guiding pipe, driving valve for picking sample, mounted with possible interaction with spring-loaded rod, placed inside the shaft of flow control tool. Hollow body is a fragment of force pipeline at vertical portion of mouth armature, control tool is made in form of valve of lesser diameter, then inner diameter of hollow body, and probing chamber is a ring-shaped hollow in hollow body, positioned at same level with valve and connected at input to flow of multi-component gas-liquid substance through extraction channels, made symmetrically to rotation axis of valve, and at output - to locking tool, while rod is provided with shelves for multi-start thread of appropriate cross-section, made at shaft on length of no less than quarter of axial step of this thread.

EFFECT: simplified construction, higher efficiency.

3 dwg

FIELD: oil industry.

SUBSTANCE: device has hollow cylindrical body, branch pipes for extraction and output of sample and locking element. Body is made thick-walled. End portions of body are made in form of truncated cone and interconnected, on the side of lesser bases by means of channel. Branch pipe for extraction of sample is made elongated, with length equal to body diameter, and is let through in transverse direction of body through the center of said channel. Within limits of branch pipe cross-section its hollow is separated by slanted solid wall on two portions, each of which is connected thereto. One portion of branch pipe hollow is meant for taking sample, other one - for feeding reagent into well product. To receive trustworthy information about sample, by setting flow to homogenous state, inner surface of cone, on the side of larger base, is provided with rigidly fixed blades for turbulization of flow flowing into body, while diameter of channel connecting cones is selected equal to diameters of their lesser bases.

EFFECT: simplified construction, broader functional capabilities, higher quality of sample.

2 cl, 3 dwg

FIELD: oil industry.

SUBSTANCE: hollow body of device is actually a fragment of force pipeline at mostly vertical portion of mouth armature. Organ for controlling flow of multi-component gas-liquid substance is made in form of valve mounted on shaft having lesser size, than inner diameter of hollow body. Sample chamber is in form of ring-shaped hollow on hollow body, positioned at same level with valve. Ring-shaped hollow is connected at input to flow of multi-component gas-liquid substance through intake channels, positioned symmetrically to valve rotation axis, and at output - with locking organ. Driving screw mounted on body of locking organ is connected to sample-taking valve with possible mutual rotation and combined axial displacement. Sample-taking valve and shaft with valve are mated with possible synchronous rotation around common axis and relative axial displacement. Working organs of device are positioned immediately near main flow of substance taken as sample to provide for lesser dimensions of device and prevented freezing in winter season.

EFFECT: simplified construction, simplified maintenance.

7 dwg

FIELD: oil production industry, particularly methods or devices for cementing, for plugging holes, crevices, or the like.

SUBSTANCE: device comprises inflatable packers to be lowered into well along with flow string. One flow string end is closed to provide simultaneous well bore packing, another end is connected to production equipment. Flow string is provided with centralizers located near inflatable packers. Formed in flow string are additional holes located opposite to packers. Well pump is installed inside flow string. High-pressure water conduit having low diameter is connected to above holes. Flow string has perforated orifices created between inflatable packers.

EFFECT: extended operational capabilities.

1 dwg

Sampler // 2257471

FIELD: oil-field equipment, particularly for obtaining fluid samples or testing fluids in boreholes or wells and may be used for integrated obtaining sample of multicomponent liquid-gas systems transported through pipelines.

SUBSTANCE: sampler comprises hollow body installed in high-pressure pipeline of wellhead fittings and extraction chamber with discharge channels. Rotary tool adapted for multicomponent liquid-gas medium flow regulation is installed inside the body. Sampler also has shutoff member with actuated sample extracting valve, handle and guiding tube. Sampler comprises hollow body made as a part of high-pressure pipeline and tool adapted for multicomponent liquid-gas medium flow regulation arranged in hollow body. The tool consists of flap installed on a shaft and having diameter corresponding to inner hollow body diameter, extraction chamber used to extract and mix multicomponent liquid-gas medium flow formed as annular cavity around hollow body. The cavity is divided into inlet and outlet parts by partition arranged at flap level. Inlet and outlet parts communicate with common multicomponent liquid-gas medium flow correspondingly through inlet and outlet channels on hollow body and through opening formed in the partition at sample extracting valve inlet. Drive screw installed in shutoff member body is connected with sample extracting valve so that drive screw and sample extracting valve may perform mutual rotation and move in axial direction. Sample extracting valve and shaft with flap mate each other so that they may perform synchronous limited rotation about common axis and mutual axial movement.

EFFECT: increased simplicity, provision of high-quality mixing of sample product and increased sample reliability.

3 dwg

Sampling device // 2258807

FIELD: oil field equipment, particularly for take samples from wellhead, namely for integrated sampling multi-component gas-liquid medium transported through pipelines.

SUBSTANCE: device has hollow body built in pressure pipeline and formed as a part of the pipeline located on vertical part of wellhead fittings. Multi-component gas-liquid medium flow control unit is made as a gate connected to rotary support shaft. Sampling chamber is created as annular cavity arranged on hollow body at gate level. Sampling chamber inlet is communicated with multi-component gas-liquid medium flow through intake manifolds formed on hollow body. Intake manifolds are side slots arranged symmetrically about gate axis of rotation. Sampling chamber outlet is communicated with shutoff member installed on rotary gate support shaft extension. Shutoff member includes seat, hold-down screw and ball contacting with the seat and embedded in pressure screw end.

EFFECT: simplified structure and increased sampling quality.

2 dwg

FIELD: mining industry, particularly to take subsurface oil samples in running and exploratory wells working in flow mode.

SUBSTANCE: sampling device has tubular body with lock mechanism arranged inside the body and connected to controlling valve assembly from the first side and controllable valve assembly from the second side thereof. Joint relay is screwed on the controlling valve assembly. The controlling assembly is retained in its opened position by joint relay including body with orifices for pin receiving, pusher acting upon the controlling valve assembly and bush with fluid circulation orifices. Valve assemblies include all-rubber valves having 30° cone angles. The relay has barbs to engage with production string connector. When sampling device moves downwards the barbs are brought into folded state.

EFFECT: increased operational reliability and prevention of oil sample degassing due to improved air-tightness of sampling device interior.

2 cl, 1 dwg

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