Determination of drill string neutral point on basis of hydraulic factor

FIELD: oil and gas industry.

SUBSTANCE: method includes acquisition of log data on depth and time for a well drilling by means of a well string; log data on depth and time including data related to factors of torsional and axial loads and data related to hydraulic factor; and determination of a drill string neutral point at the moment of drilling based on factors of torsional and axial loads and hydraulic factor.

EFFECT: determination of a drill string neutral point during well drilling.

20 cl, 4 dwg

 

The technical field

The present invention relates mainly to the development of the tank, and more specifically to determining a neutral point drill string during the drilling of wells on the basis of hydraulic factors and/or factors twisting and axial loads.

Prior art

During the development of the oil reservoir is used drillstring to drill the well.

The term "drillstring" means a combination of drill pipe, the layout of the bottom of the drill and any other tools used to rotate the drill bit in the borehole bottom. During drilling, the neutral point of the drill should be taken into account for many reasons, such as management and reducing stress. The neutral point is the point at which the drillstring passes from a state of compressive stress in the stress state of tension. The components of the drill string below the neutral point are subjected to compression, so they must have a high bending stiffness to counteract, for example, bending. In addition, if the drill string has Yas, Yas must be located either below or above the neutral point, depending on the type of Yas (i.e. compression or tension), so that, for example, could avoid a sudden disruption of the jar.

Usually, the neutral position is the first point is determined and considered in the layout of the bottom of the drill (BHA), designed at the planning stage well. BHA refers to the lower part of the drill string, which includes, if any, from the bottom up in a vertical well drilling bit, the sub bit, downhole motor (in certain cases), stabilizers, heavy-weight drill pipe, and steel drill pipe, jars and adapters for various forms of thread. The neutral point is calculated using the " tool to calculate the torsional and axial loads. Usually, the input parameters for tools for calculating torsional and axial loads include designed BHA, the geometry of the wells, observation (e.g., the type of well) and evaluation/modeling of various factors related to the drilling process. However, the evaluation/simulation may deviate from situations when actual drilling. Essentially, during drilling, the actual neutral point may differ from the pre-calculated neutral point. In addition, in the actual drilling process, the neutral point can be moved by, for example, of changes in the values of the factors twisting and axial loads, and other important factors.

The invention

The first aspect of the invention relates to a method of detecting the neutral point of the drill during the drilling of wells, the method containing the steps are: get logging on the installed depth-time for drilling a borehole using a drill string, logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; determine the hydraulic factor based on the effective density, given in the form:

The effective density = the Density of the drilling mud + (1-y) * Density drilling mud;

where represents the relative number of cuttings by volume to the volume of fluid in the annular gap and is determined by the following equation:

y=(Tbu*(dD/dt)(PI*dbit*dbit/4))/Vbu;

where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration;

dbit is the diameter of the drill bit;

and determine the neutral point of the drill string at a time while drilling based on factors twisting and axial loads and hydraulic factors.

The second aspect of the invention concerns a system for determining a neutral point drill string while drilling a borehole, the system contains a means for obtaining logging data depth-time for drilling a borehole using a drill string, the logging data depth-time, which includes data related to factors twisting and axial loads, and data related to hydraulic is the factor; means for determining the hydraulic factor, based on the effective density, given in the form:

The effective density = the Density of the drilling mud + (1-y) * Density drilling mud;

where represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:

y=(Tbu*(dD/dt)(PI*dbit*dbit/4))/Vbu;

where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration;

dbit is the diameter of the drill bit;

and means for determining a neutral point drill string at a time while drilling based on factors twisting and axial loads and hydraulic factors.

The third aspect of the invention relates to the computer medium, storing computer software code run by a computer system enables the computer system to receive data logging depth-time for drilling a borehole using a drill string, the logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; to determine the hydraulic factor based on the effective density for the Anna in the form:

The effective density = the Density of the drilling mud + (1-y) * Density drilling mud;

where represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:

y=(Tbu*(dD/dt)(PI*dbit*dbit/4))/Vbu;

where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration;

dbit is the diameter of the drill bit; and to determine the neutral point of the drill string at a time while drilling based on factors twisting and axial loads and hydraulic factors.

A fourth aspect of the invention relates to a method of providing a system for determining a neutral point drill string during the drilling of wells, the method containing the steps are:

perform at least one of the creation, maintenance, hosting and supporting computer infrastructure to perform: receiving data logging depth-time for drilling a borehole using a drill string, the logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; determination of hydraulic factor based on the effective raft the spine, given in the form:

The effective density = the Density of the drilling mud + (1-y) * Density drilling mud;

where represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:

y=(Tbu*(dD/dt)(PI*dbit*dbit/4))/Vbu;

where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration;

dbit is the diameter of the drill bit;

and determine the neutral point of the drill string at a time while drilling based on factors twisting and axial loads. Other aspects and features of the present invention is solely defined by the claims, and additional advantages of the invention will become clear to experts in the art upon reference to the following non-limiting detailed description, taken in connection with the accompanying drawings.

Brief description of drawings

The invention is illustrated by examples and not intended to be limited images accompanying drawings, in which similar references indicate similar elements and in which:

Figure 1 shows schematically a system according to the invention;

Figure 2 shows embodiments of operation the processing center;

Figure 3 shows an example layout of the bottom of the drill string and logging data depth-time;

Figure 4 shows the image of a certain neutral point on the layout of the bottom of the drill string.

A detailed description of the preferred embodiment variants of the invention

Advantages and features of the present invention can be easier understood when referring to the following detailed description of exemplary embodiments and the accompanying drawings. However, the present invention can be embodied in many different forms and should not be construed as limited presented here options of implementation. On the contrary, these embodiments of presents so that this invention will be thorough and complete, and will fully convey the concept of the invention to specialists in the art and that the present invention be defined only by the attached claims.

1 shows a diagram of a system 10 for determining a neutral point drill string 12 during the drilling of wells 14 in the reservoir bed 16. Figure 1 is a bore 14 are shown as vertical wells, but may also be well to other types, such as a directional well, including horizontal well. The reservoir 16 may include any reservoir, include the s in itself, but not limited to, oil reservoir, a gas reservoir, coal reservoir and aquifer reservoir. The drillstring 12 is controlled by control mechanism 18, which may be integrated into the drill string 12 or may be separated from it. The measuring device 20 is located along the well 14 for information (data)relating to the drilling process, for example, log data is not cased wells. The measuring device 20 may be any solution to get the required information. Here in this description, the term "solution" means any now known or developed in the future approaches to achieving the goal. For example, the measuring device 20 may include a portable datalogger twisting loads, weight indicator, logging devices, probes sampling, observation probe, and/or the like. As mentioned, the measuring device 20 may be placed along the well 14 and/or may be lowered into the borehole 14 together with the drill string 12. Figure 1 shows that the measuring device 20 is located in the earth formation, the reservoir 16, which is not required. The measuring device 20 may be positioned in the well 14.

The information obtained by the measuring device 20 is transmitted to the processing center 22 the TCA through any communication solutions. The processing center 22 includes a node 24 receive data; node 26 display; node 28 define a neutral point, which includes a means 30 for calculating torsional and axial loads and node 32 determination of hydraulic factor; node 34 localization neutral point; node 36 analysis of temporal patterns; and node 38 optimization of the drill. In accordance with the embodiment, the processing center 22 may be embodied in a computer system. A computer system may include any computing product General purpose, able to run the computer software code installed on it to perform the process described here. The computer system may also include any computing the product for special purposes, containing equipment and/or computer program code for performing specific functions, any computing product that contains a combination hardware/software special purpose and General purpose, or the like. In each case, the program code and hardware can be created using standard programming and engineering techniques, respectively.

In addition to the data transmitted from the measuring device 20, the processing center 22 may also collect other available data 40, such as the construction of whom is onuki bottom for. the drill 12.

The output 42 of the center 22 of the processing can be transferred to the user 44 and/or the control mechanism 18 for appropriate action. For example, the control mechanism 18 are manipulating the drill string 12 for shifting the location of its neutral point at the desired location. User 44 may analyze the time-dependent picture of the neutral point on the basis of the component of the drill string 12 to update the design of the drill string.

It should be understood that the components of the processing center 22 may be located in multiple locations, or can be located in one place. Next will be described the operation of the center 22 of the processing.

Figure 2 shows a variant implementation of the processing center 22. At step S1, the node 24 data receives/collects information from the measuring device 20. Information may include data logging depth-time during drilling of the wellbore 14 using the drill 12. Logging data depth-time may include data related to factors twisting and axial loads, and data related to the hydraulic factor. Factors twisting and axial loads indicate the factors used in the tool to calculate the torsional and axial loads for the calculation of the neutral point drill any, related to torsion and axial loads represent the data required to determine the torsional and axial loads. For example, the effective weight (weight in submerged) may be twisting and axial loads in determining the neutral point and the density of the drilling fluid to the formation of the reservoir 16 may be data required to calculate the effective weight. Hydraulic factor means of the hydraulic property of the earth formation of a reservoir 16, which may be used in determining the neutral point of the drill string 12, as described here. Data related to the hydraulic factor mean of the data required to calculate the hydraulic factor. For example, the effective density can be hydraulic factor in determining the neutral point of the drill string 12, and the rise time on the surface (Tbu), the volume of the annular gap (Vbu), the penetration rate (dD/dt) can be data required for calculation of the effective density. In accordance with the embodiment, the giving and receiving of information from the measuring device 20 can be performed almost in real time. Any solution may be used to provide and receive data in near real time, for example, "Integrated Drilling Evaluation and Logging" is Ideal) and "Real-time Monitoring and Data Delivery" (Interact).

At step S1, the host 24 may also receive data to receive data from other available data 40. For example, design data layout of the bottom of the drill string 12 can be collected for further processing. For example, the node 24 can receive data receive data relating to components of drill string 12, which can be processed by the editor BHA to generate schema BHA.

At step S2, showing the node 26 can display the schema BHA together with the adopted logging data depth-time. Any solution can be used to provide the mapping. For example, Figure 3 provides a printout of the displayed exemplary BHA next to the sample well log data depth-time.

At step S3, the node 28 definitions neutral point determines the neutral point of the drill string 12 on the basis of factors twisting and axial loads and hydraulic factors. In accordance with the embodiment, a specific hydraulic factor can be used in the calculation of the factors twisting and axial loads for a neutral point. Specifically, certain hydraulic factors can be used to replace the torsion and axial loads used in the calculation of the neutral point for torsional and axial loads and/or can be used to determine the twisting and sevime loads. For example, the effective weight (weight in submerged) is one of the fundamental factors twisting and axial loads in the calculation of the neutral point. The effective weight in the vertical section of the well 14 is defined by the following equation:

Weff=Wair(1-Plabouttnaboutwith atbbypaboutinaboutgaboutpandwith atinaboutpand/Plabouttnaboutwith atbmetandlland)...(1)

where Weff is the effective weight; Wair represents the weight in the air. On the other hand, the effective density of the fluid, allowing the weighing of the sludge can be gidravlicheskiy factor. The effective density is given by the following equation:

The effective density = the Density of the drilling mud + (1-y) * Density drilling mud

where represents the relative number/ratio of solids (by volume) to the volume of fluid in the annular gap, and is determined by the following equation:.

y=(Tbu*(dD/dt)(PI*dbit*dbit/4))/Vbu

where Tbu, Vbu - appropriate rise time (for the selected speed of pumping of the pump) and the volume of the annular gap, dD/dt is the rate of penetration; dbit is the diameter of the drill bit. The effective density (water factor) can be used to displace the drilling mud used in calculating the effective weight using torsional and axial loads in equation (1), which can make the determination of the effective weight and, thus, the neutral point more accurate. The effective density is only one example of a hydraulic factors. Other hydraulic factors can also be included in the calculation of the neutral point using torsional and axial loads. For example, step S3 may include two podata. On podate S3-1 node 32 determination of hydraulic determines the value (number) for each hydraulic factor on the basis of data logging depth-measuring device 20. On podate S3-2, the means 30 for calculating the torsional and axial loads determines the neutral point on the basis of factors twisting and axial loads and hydraulic factors that are used to override the factors twisting and axial loads or to calculate factors twisting and OS is o loads. In accordance with the embodiment, the step S3 is embodied in almost real time by using a processing center 22, and a definite neutral point corresponds to a specific point in time in the drilling process. At step S4, the node 34 finding the neutral point finds the neutral point on the drill string 12. Any solution can be used for finding. For example, the length of each component of the drill string 12 can be determined in near real time together with determination of the neutral point. Then the neutral point can be found on the specific component. It should be noted that the neutral point is defined as the point on the drill string 12 with respect to its length. In accordance with the embodiment, certain neutral point can be shown on the diagram BHA, as shown in Figure 4, an exemplary screen shot of the image.

At step S5, the node 36 analysis of temporal pattern analyses time-dependent picture of the neutral point is located on the component. It should be noted that during the drilling process neutral point can move. For example, the neutral point may first is on the component And then move on component and then move back to component A. Any time-dependent picture can be is analyzed. For example, in accordance with the embodiment, the node 36 analysis of temporal pattern can be analyzed when the neutral point remains on the component, as long neutral point remains on it, and when the neutral point is returned. Node 36 analysis of temporal pattern can also analyze how often the component is experiencing switching between compression and tension due to the movement of the neutral point. At step S6, the node 38 optimization of the drill controls the optimization of the drill string 12 on the basis of the results of at least one of steps S3-S5. For example, the node 38 optimization of the drill may give instructions to the control mechanism 18 for manipulating the neutral point to the neutral point remained in the desired position/component of the drill string 12. Node 38 optimization of the drill may also report the results to the user 44 to change the design of the drill 12. For example, if it is determined that the component is designed primarily to stay in a state of compression, in reality experiencing the tensile strength, the design of a component can be modified to meet the requirements of the environment with compression. There might also be other solutions to optimize the drill 12.

Although shown and described here in is the quality of the method and system for determining a neutral point drill string during the drilling of wells, it should be understood that the invention additionally provides a variety of additional features. For example, in the embodiment, the invention provides a program product stored on a computer-readable medium, which when executed enables a computer infrastructure to determine the neutral point of the drill during the drilling of wells. For example, computer-readable medium includes program code, which when executed by a computer system enables the computer system to implement the processing center 22 (Fig 1), which controls the process described here. It should be understood that the term "computer-readable medium" includes one or more tangible embodiments of any type to code. In particular, the computer-readable medium may contain a program code embodied in one or more portable devices for storage (e.g., compact disk, magnetic disk, tape, and so forth), one or more parts of the storage processing device, such as memory and/or another storage system, and/or in the form of a data signal propagating through the network (e.g., during a wired/wireless. electronic distribution of software product).

In addition, there is the way to ensure a system for detecting the neutral that is key to the drill during the drilling of wells. In this case, a computer infrastructure, such as the center 22 of the handle (1)can be obtained (e.g., created, supported, make available, and so on), and one or more systems for performing the process described here can be obtained (e.g., created, purchased, used, modified, and so on) and placed in a computer infrastructure. For example, each system may contain one or more of: (1) installing program code on a computing device, such as a processing center 22 (Fig 1), with computer-readable media; (2) adding one or more computing devices to the computer infrastructure; and (3) incorporating and/or modifying one or more existing systems of the computer infrastructure enabling the computer infrastructure to perform the process of the invention.

As used here, it should be understood that the term "program code" and "computer program code" are synonymous and mean any expression, in any language, code or notation, of a set of instructions that cause a computing device having a processing capability information, to perform a particular function either directly or after any combination of the following: (a) conversion to another language, code or notation;

(b) reproduction in a different material form; and/the Li (C) decompression. For example, program code may be embodied in the form of one or more types of software, such as application/software program, component software/a library of functions, an operating system, the system basic input/output/driver for a particular computing device or device I/o, and the like. Further, it should be understood that the terms "component" and "system" are synonymous as used here, and represent a combination of hardware and/or software capable of performing some function(s).

The flowchart and block diagrams in the drawings illustrate the architecture, functionality and operation of possible embodiments of systems, methods and computer program products in accordance with the variations in implementation of the present invention. In this regard, each block in the flowcharts or block diagrams may represent a module, segment, or portion of code that contains one or more executable instructions for the realization of specific logical functions(and). It should also be noted that in some alternative embodiments, the implementation of the functions noted in the blocks may be in a different order than that indicated on the drawings. For example, two blocks shown consistently, can, in fact, be performed p is essentially at the same time, or the blocks may sometimes be executed in reverse order, depending on functionality. It should also be understood that each block in the illustration, the block diagrams and/or block diagrams, and combination of blocks in the illustrations of block diagrams and/or block diagrams, can be implemented by systems based on special purpose equipment, which perform specific functions or steps, or combinations of special purpose equipment and computer instructions.

We use here the terminology is used only for the purpose of describing particular embodiments only and is not intended to limit the invention. As used here, form the singular are intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "includes" and/or "comprising" when used in this description to indicate the presence of the mentioned characteristics, numbers, steps, operations, elements and/or components, but do not prevent the presence or addition of one or more other characteristics, numbers, steps, operations, elements, components and/or groups.

Although the invention has been specifically shown and discussed with reference to exemplary embodiments of its implementation, specialists in the art should understand that R is lichnye changes in form and details may be made without going beyond the nature and scope of the invention, as defined by the claims. In addition, specialists in the art will appreciate that any means calculated to achieve the same purposes may be used instead of the shown specific embodiments that the invention has other applications in other environments.

1. The method of determining the neutral point of the drill during the drilling of wells containing phases in which:
receive data logging depth-time for drilling a borehole using a drill string, and data logging depth-time include data related to factors twisting and axial loads, and data related to the hydraulic factor; and
determine the hydraulic factor based on the effective density, given in the form:
the effective density = y · the density of drilling mud + (1-y) · density drilling mud;
where y represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:
y=(Tbu·(dD/dt)(PI·dbit·dbit/4))/Vbu;
where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration; dbit is the diameter of the drill bit;
determine the neutral point of the drill in mo is UNT of time during drilling based on the factors twisting and axial loads and hydraulic factors.

2. The method according to claim 1, which further define the location of a particular neutral point at this point in time on the drill string.

3. The method according to claim 2, which further
display the layout of the bottom of the drill string together with data logging depth-time; and
show some neutral point on the layout of the bottom of the drill string.

4. The method according to claim 2, which further analyze the time-dependent picture of the neutral point is located on the component.

5. The method according to claim 1, in which the stages, at least, receiving and determining are implemented practically in real time.

6. The method according to claim 1, wherein the step of determining includes the step on which the hydraulic factor included in the calculation of torsional and axial loads for a neutral point.

7. System for determining a neutral point during the drilling of wells, comprising:
means for receiving data logging depth-time for drilling a borehole using a drill string, the logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; and
means for determining the hydraulic factor, based on the effective density, given in the form:
the effective density = y · is latest cuttings + (1-y) · density drilling mud;
where y represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:
y=(Tbu·(dD/dt)(PI·dbit·dbit/4))/Vbu;
where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration; dbit is the diameter of the drill bit;
means for determining a neutral point drill string at a time while drilling based on factors twisting and axial loads and hydraulic factors.

8. The system according to claim 7, further containing a means for determining the location of a particular neutral point at this point in time on the drill string.

9. The system of claim 8, further containing a means for displaying a layout diagram of the bottom of the drill string together with data logging depth-time to display a specific neutral point on the layout of the bottom of the drill string.

10. The system of claim 8, further containing a means for analyzing the time-dependent picture of the neutral point is located on the component.

11. The system according to claim 7, in which at least one of the means of obtaining and means defining implements respectively receiving and determining almost in real mode the time.

12. The system according to claim 7 in which the means for determining includes a hydraulic factor in the calculation of torsional and axial loads for a neutral point.

13. Used computer storage media having stored thereon computer-software code that, when executed by a computer system, enables the computer system:
to obtain logging data depth-time for drilling a borehole using a drill string, the logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; and
determine the hydraulic factor based on the effective density, given in the form:
the effective density = y · the density of drilling mud + (1-y) · density drilling mud;
where y represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:
y=(Tbu·(dD/dt)(PI·dbit·dbit/4))/Vbu;
where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration; dbit is the diameter of the drill bit;
to determine the neutral point of the drill string at a time while drilling based on factors twisting and axial loads and g is gravicembalo factor.

14. Media in item 13, in which the program code is additionally configured
to allow the computer system to determine the location of a particular neutral point at this point in time on the drill string.

15. The media 14 in which the program code is additionally configured to allow the computer system to display the layout of the bottom of the drill string together with data logging depth-time and display a certain neutral point on the layout of the bottom of the drill string.

16. The media 14 in which the program code is additionally configured to allow the computer system to analyze the time-dependent picture of the neutral point is located on the component.

17. Media in item 13, in which the program code is additionally configured to allow the computer system to determine the neutral point by including a hydraulic factor in the calculation of torsional and axial loads for a neutral point.

18. The method of providing system for determining a neutral point drill string during the drilling of wells containing phases in which:
perform at least one of the creation, maintenance, hosting and supporting computer infrastructure to perform:
obtain logging data is x depth-time for drilling a borehole using a drill string, logging data depth-time, which includes data related to factors twisting and axial loads, and data related to the hydraulic factor; and
determination of hydraulic factor based on the effective density, given in the form:
the effective density = y · the density of drilling mud + (1-y) · density drilling mud;
where y represents the relative number of cuttings by volume to the volume of fluid in the annular gap, and is determined by the following equation:
y=(Tbu·(dD/dt)(PI·dbit·dbit/4))/Vbu;
where Tbu corresponds to the rise time for the selected speed of pumping of the pump, and Vbu corresponds to the volume of the annular gap, dD/dt is the rate of penetration; dbit is the diameter of the drill bit; and
determine the neutral point of the drill string at a time while drilling based on factors twisting and axial loads.

19. The method according to p, in which the computer infrastructure is additionally able to determine the location of a particular neutral point at this point in time on the drill string.

20. The method according to claim 19, in which the computer infrastructure is additionally capable of analyzing time-dependent picture of the neutral point is located on the component.



 

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SUBSTANCE: method involves drilling of production and injection wells, pumping of displacement agent through injection wells and extraction of the product through production wells, drilling of additional wells, and development of residual oil-saturated intervals. According to the invention, in all newly drilled additional wells there determined are residual oil-saturated and flooded intervals prior to the well casing. For that purpose, one-stage determination of temperature field is performed throughout the length of the well in real time both at filling of the shaft with heated washing liquid or water and after it is filled using an optic-fibre system. In case of absorption of washing liquid or water, volume of their supply, which provides full filling of the well, is increased. After the well casing residual oil-saturated and/or water-saturated intervals are developed, and displacement agent is extracted and/or pumped.

EFFECT: increasing oil recovery owing to improving the accuracy of determination of intervals of arrangement of water-saturated and residual oil-saturated zones.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: electric motor of a submersible pump can be equipped with two rotary shafts, and namely an upper one that is more rotary and a lower one that is less rotary, which are controlled with one common or two different individual current supply cables and connected to the submersible pump and a shutoff element. Lower electric motor is provided with the less rotary shaft controlled with a common or an individual current supply cable. The shutoff element consists of an upper rotating bar and a lower movable bar, which are connected to each other by means of screw thread. The rotating bar is connected from above with the less rotary shaft through a spline square or a hexagon and installed in the housing with possibility of being rotated only on the axis to one and another sides. The movable bar is connected from below between two pass assemblies in the form of mounting seats or seats with a shutter installed in the housing with possibility of being moved only along the axis till tight closing of above and below located mounting seats to assure the possibility of both the control and cutout of the fluid flow of the corresponding formation.

EFFECT: improving reliability and efficiency of the plant.

2 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: system includes control centre of electric-centrifugal pump to power transformer is connected and output of the transformer is connected by power circuits of submersible cable through input lead with submersible electric motor. In downhole part control unit is connected to power supply source by one input and to the first input/output of the amplifier by the other input/output. The second input/output of the amplifier together with input of power supply source is connected through a pressure-seal connector to independent signal circuit formed by transit insulated conductor laid between stator pack and housing of submersible electric motor connected at the other end through input lead with signal core of submersible cable. In surface part this core is connected to output of remote power supply and to the first input/output of transceiver which second input/output is connected to the first input/output of surface control unit and its second input/output is connected to input/output of the control centre of electric-centrifugal pump. The third output is connected to input of remote power source. The amplifier in downhole part and transceiver in surface part are designed to ensure half-duplex operation during data exchange as bidirectional network. Input lead assembly of submersible electric motor is made according to four-contact circuit. In the downhole part independent signal circuit can be prolonged for the purpose of connection to other equipment placed downstream of submersible centrifugal pump by means of this circuit transit through the downhole part of the system in order to arrange measurement and control of actuating mechanisms placed in other areas of the well space. The downhole control unit contains analogue and discreet measuring channels connected to the processor. Outputs of analogue pressure and temperature transducers and test signal shaper are connected to respective inputs of analogue multiplexor which output is connected to input of analogue-to-digital converter. Its second input/output is connected to the first input/output of the processor and the second input/output of the processor is connected to control input of multiplexor. Discreet measuring inputs are connected to vibration sensor and the third input/output is connected to the first input/output of the amplifier. Number of measured parameters is increased due to additional measuring channels and modification of the processor application software.

EFFECT: improvement of the device operational reliability and simplification of the device.

6 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: bore core is selected and examined, induction logging and induced gamma-ray logging or neutron-neutron logging is made and log curves are analysed for the roof of production tier. At that formations with apparent resistivity are identified with values less than 6-8 Ohm/m during induction logging and against values at curves of induced gamma-ray logging or neutron-neutron logging making less 85% and less than values of lower formations. Among these formations it is necessary to select strata without loamy lintels and strata of carbonate oil-filled formations and values of apparent resistivity not less than 15 Ohm/m against data of induction logging. Then sedimentary types for the selected formations is defined and if oil-saturated sandstone is present then conclusion is made about terrigenous origin of these formations. Then values are specified for porosity coefficient, permeability and oil-saturation coefficients and when lower limits for this region are exceeded the indentified formations will be referred to productive formations.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex, improvement of level of detail and authenticity of GIS data for identification of geological rating for rock masses.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: down-hole testing and measuring complex includes earth control station with telemetric data system connected by a logging cable with submerged-type electric pump at the end of tubing string, system of measuring modules including sensors for recording of parameters (yield, pressure, temperature, moisture content) and driving machine for their delivery to horizontal section of a well connected by a logging cable that provides rigid mounting for the system of measuring modules and transfer of data to the control station. Logging cables of the system of measuring modules telemetric system unit are connected by cable connectors. Driving machine contains two walking modules connected electrically and further driven by electrical micro-drives and sequential movement of wedged supports. Installation of the down-hole testing and measuring complex is performed in two stages. At first system of measuring modules is lowered to a well by means of winch with survey cable connected by a cable connector with a logging cable of the system of measuring modules passing through a groove in the wall of an installation pipe mounted at the well surface at the end of tubing string and by the other butt end - to the deadman in which tube there is a movable logging cable. The system of measuring modules is lowered at first up to driving machine turning to a relatively horizontal section, then by means of the driving machine it is hold to the relatively horizontal section until cable connector seats in the deadman tube; the latter is lowered by means of the installation pipe to the preset depth and fixed on the well bore. Thereafter power supply is switched odd in the micro-drive, by means of the winch socket with the survey cable is disconnected from connector pin and the installation pipe is lifted to the surface. At the second stage submerged-type electric pump is lowered to the well with logging cable and socket of cable connector contact pair filled by liquid sealant which is by means of a centring skid connected to the logging cable for the system of measuring modules.

EFFECT: increase of operational efficiency during installation of the bottom-hole complex.

6 cl, 5 dwg

FIELD: mining.

SUBSTANCE: method to calculate instantaneous speed of drilling string assembly bottom rotation at a lower end of the drilling string, with a drive from a drilling mechanism on the upper end of the drilling string exposed to oscillations of sticking-slipping, having the rated or observed main frequency, besides, the method contains stages of detecting changes in a torque on a shaft of the drilling mechanism, combining the available torsion pliability of the drilling string with changes of the torque at the shaft and generation of an output signal, which represents instantaneous speed of rotation.

EFFECT: tuning of proportional-integral or proportional-integral-differential controller for damping of twisting waves energy at sticking-slipping frequency or near it.

15 cl, 15 dwg

FIELD: mining.

SUBSTANCE: method contains the following stages: (a) damping of sticking-slipping oscillations using a drilling mechanism above a drilling string, (b) control of drilling mechanism speed of rotation using a PI controller, (c) turning of a PI controller so that the drilling mechanism absorbs a larger part of twisting energy from the drilling string at the frequency of sticking-slipping oscillations or near it.

EFFECT: tuning of proportional-integral or proportional-integral-differential controller for damping of twisting waves energy at sticking-slipping frequency or near it.

21 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: construction machine includes load-carrying plant, actuating device installed with possibility of adjusting the position relative to the load-carrying plant, at least one sensor to sense the position of supporting strut of mast, and at least one sensor to sense pulling force in auxiliary rope, and computing device provided with possibility of determining (based on the data of the above sensors) at least one adjustment range of actuating device, in which the actuating device can be adjusted at pre-specified stability of construction machine against turning over.

EFFECT: determination of overturning moment of construction machine and provision of stability of construction machine.

10 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves the following stages: obtaining the entry including the specified drilling trajectory to target location; determination of predicted location of equipment of drilling string bottom of drilling system at continuous drilling; comparison of predicted location of equipment of drilling string bottom with the specified drilling trajectory for determination of deviation value; creation of the changed drilling trajectory to target location, which is chosen based on deviation value from the specified drilling trajectory; automatic and electronic creation of one or several control signals of drilling device on the well surface to direct the equipment of drilling string bottom of drilling system to target location as per the changed drilling trajectory.

EFFECT: improved control of equipment of drilling string bottom, which leads to improved response of equipment of drilling string bottom and quicker operation of equipment of drilling string bottom.

21 cl, 11 dwg

FIELD: oil and gas production.

SUBSTANCE: proposed method comprises adjusting and maintaining optimum differential pressure by defining and adjusting flushing fluid density, allowing fro mechanical rate of boring depending on formation drillability index. In compliance with proposed method, drilling parameters are controlled directly at well bottom. Here, adjusted are differential pressure above screw device bit and flushing fluid density by mounting separator there above. Note here that all components feature equal diameter while drilling rate is optimised by calculation of drilling parameters. The latter include bit rpm, load on bit, flushing fluid flow rate to be defined from mathematical expressions. Besides, drilling string bottom comprises bit, sludge trap and drilling tubes. In compliance with this invention, screw device and separator are mounted above the bit. Note here that diameter of external generator of screw, separator and other components should be equal.

EFFECT: higher efficiency of rock breaking.

2 cl, 1 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to tool for geotechnical measures as, for example: fitting or removing plug, valve opening/closing, tube cutting and borehole cleaning. Proposed tool 100 comprises unit arranged on well-logging cable to work at well bottom and electric drive 40 connected with aforesaid unit to control it. Note here that proposed tool incorporates one or several transducers 25, 45, 65, 85 to measure, at least, one operating parameter of proposed unit. Also, this tool comprises linear actuator connected with drive and configured to displace the tool linearly and anchoring system connected with electric drive unit. Geotechnical parameters are optimised on the basis of, at least, one measured operating parameter.

EFFECT: monitoring of operating parameters.

36 cl, 3 dwg

FIELD: oil and gas production.

SUBSTANCE: method consists in creation of model that simulates operating mode of packed-hole assembly used for well bore drilling in drilling operation, performing drilling operation simulation with the use of model and random modification of drilling operation or packed-hole assembly on the base of simulation analysis.

EFFECT: increase of efficiency and output rate of drilling operation.

23 cl, 21 dwg

FIELD: oil and gas industry.

SUBSTANCE: automated system, which maintains preset density of drilling fluid prepared based on gaseous flushing agents and includes test equipment and remote monitors, contains also commutator, commutator of analogue-to-digital converter of computer interface card and variable speed drives for prompt control of flow of liquid or gas component of gaseous agents. Accuracy of control and responsiveness of the system is reached by use of digital form of transmission and processing of data with high accuracy of conversion. For this system density control is performed not by direct measurement but by calculation based on analytic dependences using data recorded by test equipment installed on transportation lines of foam preparation system. On-the-spot maintaining of required density of foam is performed using variable speed drives installed on compressor plant and pump for foam-forming fluid.

EFFECT: improving efficiency of control of properties of drilling fluid prepared based on gaseous flushing agents - foam solutions by means of accurate and prompt response of the system to its probable changes.

2 dwg

FIELD: mining.

SUBSTANCE: drilling derrick includes drilling machine, parallel vertical supports attached to the floor or foundation from below and to common frame from above, drilling machine is installed in triangular, rectangular or square support frame, there are guide rails in the corners of support frame, there provided are means for support frame movement with the possibility of specified level adjustment along the supports, and drilling machine is done with the possibility of sloping angle changing in relation to support frame. Drilling machine for drilling derrick includes controller for drilling machine functions control with possibility of wireless control from external unit of remote control, note that controller is connected to power source, controller is also connected to process regulating hydraulic valves with electric control for controlling operation of hydraulic executing mechanisms in drilling machine. Method of drilling derrick control includes movement of support frame together with drilling machine along the supports, tilting of drilling machine in relation of support frame with provision of receiving of drilling column element at support frame with drilling machine in specified position and attachment of drilling column element to drilling machine.

EFFECT: increase of load-carrying capacity and stroke length of drilling machine, reduction of structure area, provision of reliable and simple transmission of control energy from external source to drilling machine excluding cables.

10 cl, 20 dwg

FIELD: oil and gas industry.

SUBSTANCE: monitoring method of axial load on bit at turbine drilling of the well equipped with drill pump, delivery line, drilling hose, gooseneck, swivel, drill column, turbo-drill, bit, with ground rejection filter additionally arranged in delivery line of drill pump, acoustically rotating rejection filter rigidly attached through shaft of turbo-drill to turbo-drill and bit, hydrophone with measuring equipment between swivel with gooseneck and drilling hose. It includes drill pump for supply of flushing fluid via drill column to turbo-drill, via delivery line, via drill column from drill pump to turbine blades of turbo-drill and brings into rotation of shaft turbo-drill rigidly connected to the bit. At that, frequency band in the spectrum generated with drill pump, ground rejection filter arranged in delivery line is converted; broad-band acoustic spectrum with constant amplitude is generated with turbine blades; broad-band acoustic spectrum is generated with impacts of teeth of roller cutters against mine rock, with varying amplitude dependent on the bit load; frequency band is converted as per amplitude from total acoustic spectrum consisting of spectra generated with turbine blades and impacts of teeth of roller cutters against mine rock to the range of low frequencies by means of amplitude-pulse modulation with acoustic rotating rejection filter arranged on turbo-drill shaft; at the same time, monitoring of the changing bit load is performed through hydrophone connected to measuring equipment as per varying amplitude of acoustic waves converted by means of amplitude-pulse modulation of low frequency range with acoustic rotation rejection filter.

EFFECT: improving monitoring reliability of bit axial load at turbine drilling.

1 ex, 10 dwg

FIELD: mining industry.

SUBSTANCE: system includes mathematical model of drilling process in form of combined influence of conditions at pit-face and of drilling column operation. Model of drilling process is constantly renewed by results of well measurements performed during drilling operation. On basis of renewed drilling process model a set of optimal drilling parameters is determined and sent to system for controlling surface equipment. Also, system allows surface equipment control system to automatically adjust current control sets for surface equipment on basis of renewed optimal drilling parameters. Different control scenarios are generated and executed for transferring data to surface equipment control system on basis of current drilling mode.

EFFECT: optimized operation.

2 cl, 7 dwg

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