CA3107988A1 - Steering unit for static push rotary steering tool - Google Patents
Steering unit for static push rotary steering toolInfo
- Publication number
- CA3107988A1 CA3107988A1 CA3107988A CA3107988A CA3107988A1 CA 3107988 A1 CA3107988 A1 CA 3107988A1 CA 3107988 A CA3107988 A CA 3107988A CA 3107988 A CA3107988 A CA 3107988A CA 3107988 A1 CA3107988 A1 CA 3107988A1
- Authority
- CA
- Canada
- Prior art keywords
- dynamic seal
- mandrel
- sleeve
- hole
- nipple
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 30
- 210000002445 nipple Anatomy 0.000 claims abstract description 81
- 239000000523 sample Substances 0.000 claims abstract description 13
- 230000003628 erosive effect Effects 0.000 claims abstract description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 13
- 239000003921 oil Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention discloses a steering unit for a static push rotary steering tool, the steering unit includes a control nipple and an executive nipple connected in a coaxial way, the control nipple includes a control nipple body, a sleeve, an electronic warehouse, a circuit board, a connector, a hydraulic module, an erosion resistant cavity, and a nearing-drill bit measuring probe, etc.; the executive nipple mainly includes an upper mandrel, a connecting ring, a dynamic seal mandrel, a dynamic seal group, a bearing, a non-rotating sleeve, a double plunger pushing assembly, and a lower mandrel, etc. The steering unit for a static push rotary steering tool provided by the present invention has a reasonable and compact structural design, and a more advanced working principle, which is beneficial to the miniaturization of the diameter of the steering unit for the rotary steering tool, improves the energy transmission efficiency of the tool, the accuracy of information transmission and the service life of the bearing, improves the performance, stability, and reliability of the rotary steering tool, and extends the service life of the rotary steering tool.
Description
STEERING UNIT FOR STATIC PUSH ROTARY STEERING
TOOL
TECHNICAL FIELD
[0001] The present invention relates to a rotary steering tool capable of orienting a drilling, in particular, to a steering unit for a static push rotary steering tooL
BACKGROUND
TOOL
TECHNICAL FIELD
[0001] The present invention relates to a rotary steering tool capable of orienting a drilling, in particular, to a steering unit for a static push rotary steering tooL
BACKGROUND
[0002] With the continuous advancement and deep development of oil and gas field development, more and more old oil fields at home and abroad are continuously declining in annual output, and have entered the middle and late stages of oil and gas development. Many of the newly discovered oil and gas fields are located at sea, lakes, and cities. Some unconventional oil and gas fields, such as shale gas, shale oil and coalbed methane, need to improve the drilling encounter rate of the reservoir.
With the emergence of these situations, there is an increasing demand for wells with complex structures, such as extended reach wells, horizontal wells, branch wells, and fishbone wells.
With the emergence of these situations, there is an increasing demand for wells with complex structures, such as extended reach wells, horizontal wells, branch wells, and fishbone wells.
[0003] Rotary steerable drilling technology is a cutting-edge drilling technology developed in the 1990s, which integrates mechanical, electrical and hydraulic technologies. It relies on an offset mechanism of a rotary steering tool to make the drill bit or drill string deviate in direction, so as to produce a steering effect.
Compared with a conventional directional drilling technology¨sliding steering drilling technology, since the rotary steering tool is always in a rotary drilling state slidably at the bottom of the well, the borehole cleaning effect is better and smoother, and the borehole trajectory control accuracy is higher, which reduces the problem of easy-to-cause backing pressure in well sections of such as horizontal well and i WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 extended reach well, increases the extension limit length of horizontal section, and greatly shortens the drilling cycle.
Compared with a conventional directional drilling technology¨sliding steering drilling technology, since the rotary steering tool is always in a rotary drilling state slidably at the bottom of the well, the borehole cleaning effect is better and smoother, and the borehole trajectory control accuracy is higher, which reduces the problem of easy-to-cause backing pressure in well sections of such as horizontal well and i WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 extended reach well, increases the extension limit length of horizontal section, and greatly shortens the drilling cycle.
[0004] The rotary steering tool is a core tool of the rotary steerable drilling technology, and can be divided into push and direction type according to different steering methods. Push is to directly form a fulcrum supported on the borehole wall near the drill bit to provide a thrust force to push the drill bit towards a target direction of the borehole trajectory; the direction type is to make the drill string near the drill bit bend so that the drill bit points to the target direction of the borehole trajectory.
According to the different working modes of the offset mechanism of the push rotary steering tool, the push rotary steering tool is divided into static push rotary steering tool and dynamic push rotary steering tool. The static push rotary steering tool refers to that the offset steering mechanism does not rotate with the drill string in the drilling process, but supports in a certain direction of the well wall to provide a thrust force for the drill bit; and the dynamic push rotary steering tool refers to that the offset .. steering mechanism rotates with the drill string in the drilling process, and the offset steering mechanism constantly extends in a certain direction by a control system to support the well wall and provide a thrust force for the drill bit.
According to the different working modes of the offset mechanism of the push rotary steering tool, the push rotary steering tool is divided into static push rotary steering tool and dynamic push rotary steering tool. The static push rotary steering tool refers to that the offset steering mechanism does not rotate with the drill string in the drilling process, but supports in a certain direction of the well wall to provide a thrust force for the drill bit; and the dynamic push rotary steering tool refers to that the offset .. steering mechanism rotates with the drill string in the drilling process, and the offset steering mechanism constantly extends in a certain direction by a control system to support the well wall and provide a thrust force for the drill bit.
[0005] At present, a variety of structures have been developed for the static push rotary steering tool, and the static push rotary steering tool has the advantages of simple operation and easy control, etc. and has been widely used, generally including ground tool, downhole tool, and auxiliary tool, etc. The downhole tool is mainly composed of downhole power and pulse generating unit, MWD unit, LWD unit, flexible nipple, and steering unit, etc. Among them, the steering unit is the core part of the downhole tool, and mainly measures the bottom hole information, and controls the extension or retraction of a support block on the steering unit by receiving q signal command sent from below the ground, so as to realize the control of the borehole trajectory.
[0006] The currently known steering unit for the static push rotary steering tool has various structures, and is mainly composed of a mandrel, a non-rotating sleeve, a bearing, and a non-contact rotary transformer, etc. The upper end of the mandrel is W SLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 connected to the drill string, and the lower end thereof is connected to the drill bit, the mandrel is mainly used to transmit the weight on bit, and torque, and transport drilling fluid. The non-rotating sleeve is installed on the mandrel through a bearing, and energy and information transmissions between the non-rotating sleeve and the mandrel are realized through the non-contact rotary transformer. The non-rotating sleeve is equipped with three support blocks distributed at 1200 interval, measuring system, control system, and hydraulic module, etc. Through the measurement system, the bottom hole pressure, vibration and other parameters are measured; the control system and the hydraulic module are used to control the expansion and contraction of the three support blocks to provide an expected thrust force for the drill bit.
[0007] There are still some shortcomings and deficiencies in the currently known steering unit for the static push rotary steering tooL Since the hydraulic module and the support blocks are on the same section of the circumference of the non-rotating sleeve, it is difficult to miniaturize the steering unit, and it is difficult to design the diameter of the steering unit to be smaller. For example, the invention patent CN108894729A discloses a press push rotary steering tool, which embeds the hydraulic module under the support blocks, so that the support blocks and the hydraulic module are installed in a position of the same section of the non-rotating sleeve. The transmissions of energy and information between the mandrel and the non-rotating sleeve of the steering unit relies on the non-contact rotary transformer, which reduces the energy transmission efficiency, increases the energy consumption, and reduces the accuracy and reliability of information transmission. When the bearing is in contact with the mud, since the mud contains solid particles and rock debris, etc., the wear and fatigue of the bearing are accelerated and the service life of the bearing is reduced.
[0008] Based on the above-mentioned problems existing in the steering unit for a rotary steering tool that have been disclosed so far, it is necessary to improve the structure of the steering unit for the rotary steering tool in order to solve the problems and shortcomings of the current steering unit for the rotary steering tool, which is beneficial to reduce its diameter, improve the energy transmission efficiency of the WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 tool, the accuracy of information transmission and the service life of the bearing, improve the performance, stability, and reliability of the rotary steering tool, and extend the service life of the rotary steering tool.
SUMMARY
SUMMARY
[0009] An object of the present invention is to provide a steering unit for a static push rotary steering tool, which overcomes the shortcomings of the prior art and can effectively solve the problems of the existing steering unit having an diameter that is not easy to be miniaturized, low energy transmission efficiency, poor information transmission accuracy, and short bearing life.
[0010] In order to achieve the above object, the present invention provides the following technical solution:
a steering unit for a static push rotary steering tool, comprising a control nipple and an executive nipple connected in a coaxial way;
the control nipple includes a control nipple body, a sleeve, an electronic warehouse, a circuit board, a connector, a hydraulic module, an erosion resistant cavity, and a nearing-drill bit measuring probe;
the executive nipple includes an upper mandrel, a connecting ring, a dynamic seal mandrel, a dynamic seal group, a bearing, a non-rotating sleeve, a double plunger pushing assembly, and a lower mandrel;
the sleeve is sleeved outside the control nipple body, and a number of electronic warehouses are arranged in the control nipple body and are internally equipped with the circuit board for controlling electrical devices in the control nipple;
a number of hydraulic modules are arranged in the control nipple body, a servo motor in each hydraulic module is connected with a circuit board through the connector, and each hydraulic module is connected with the double plunger pushing assembly in the executive nipple through a first hydraulic oil through hole on the control nipple body;
the nearing-drill bit measuring probe is placed in a middle of the control nipple body and connected with the circuit board; the erosion resistant cavity is arranged in the WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 control nipple body and is close to the nearing-drill bit measuring probe;
the upper mandrel and the lower mandrel are coaxially connected sequence, and the upper mandrel is connected with a lower end of the control nipple body; a second hydraulic oil through hole is arranged on the upper mandrel, an upper end of the second hydraulic oil through hole is communicated with the hydraulic modules of the control nipple through the first hydraulic oil through hole, a lower end of the second hydraulic oil through hole is connected with a fifth hydraulic oil through hole on the dynamic seal mandrel through the connecting ring, the fifth hydraulic oil through hole on the dynamic seal mandrel is connected with a third hydraulic oil through hole in the non-rotating sleeve that is sleeved on the dynamic seal mandrel through an annular seal cavity formed by a first dynamic seal group, the third hydraulic oil through hole on the non-rotating sleeve is connected with a piston cavity of a piston in the double plunger pushing assembly that is sleeved on the non-rotating sleeve.
a steering unit for a static push rotary steering tool, comprising a control nipple and an executive nipple connected in a coaxial way;
the control nipple includes a control nipple body, a sleeve, an electronic warehouse, a circuit board, a connector, a hydraulic module, an erosion resistant cavity, and a nearing-drill bit measuring probe;
the executive nipple includes an upper mandrel, a connecting ring, a dynamic seal mandrel, a dynamic seal group, a bearing, a non-rotating sleeve, a double plunger pushing assembly, and a lower mandrel;
the sleeve is sleeved outside the control nipple body, and a number of electronic warehouses are arranged in the control nipple body and are internally equipped with the circuit board for controlling electrical devices in the control nipple;
a number of hydraulic modules are arranged in the control nipple body, a servo motor in each hydraulic module is connected with a circuit board through the connector, and each hydraulic module is connected with the double plunger pushing assembly in the executive nipple through a first hydraulic oil through hole on the control nipple body;
the nearing-drill bit measuring probe is placed in a middle of the control nipple body and connected with the circuit board; the erosion resistant cavity is arranged in the WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 control nipple body and is close to the nearing-drill bit measuring probe;
the upper mandrel and the lower mandrel are coaxially connected sequence, and the upper mandrel is connected with a lower end of the control nipple body; a second hydraulic oil through hole is arranged on the upper mandrel, an upper end of the second hydraulic oil through hole is communicated with the hydraulic modules of the control nipple through the first hydraulic oil through hole, a lower end of the second hydraulic oil through hole is connected with a fifth hydraulic oil through hole on the dynamic seal mandrel through the connecting ring, the fifth hydraulic oil through hole on the dynamic seal mandrel is connected with a third hydraulic oil through hole in the non-rotating sleeve that is sleeved on the dynamic seal mandrel through an annular seal cavity formed by a first dynamic seal group, the third hydraulic oil through hole on the non-rotating sleeve is connected with a piston cavity of a piston in the double plunger pushing assembly that is sleeved on the non-rotating sleeve.
[0011] Preferably, the lower end of the control nipple body and the upper mandrel of the executive nipple are sealed by a seal ring assembly.
[0012] Preferably, an adjusting ring is provided between one end of the sleeve and the control nipple body.
[0013] Preferably, an upper thrust-stopping bearing for preventing an axial movement of the non-rotating sleeve and an upper radial bearing for preventing a radial movement of the non-rotating sleeve are sleeved on the dynamic seal mandrel;
a first dynamic seal sleeve, a second dynamic seal sleeve, and a third dynamic seal sleeve are sleeved on the dynamic seal mandrel; the first dynamic seal sleeve, the second dynamic seal sleeve, and the third dynamic seal sleeve are respectively sealed with the dynamic seal mandrel through the first dynamic seal group, a second dynamic seal group, and a third dynamic seal group; a lower thrust-stopping bearing for preventing an axial movement of the second dynamic seal sleeve and a lower radial bearing for preventing a radial movement of the second dynamic seal sleeve are sleeved on the dynamic seal mandreL
a first dynamic seal sleeve, a second dynamic seal sleeve, and a third dynamic seal sleeve are sleeved on the dynamic seal mandrel; the first dynamic seal sleeve, the second dynamic seal sleeve, and the third dynamic seal sleeve are respectively sealed with the dynamic seal mandrel through the first dynamic seal group, a second dynamic seal group, and a third dynamic seal group; a lower thrust-stopping bearing for preventing an axial movement of the second dynamic seal sleeve and a lower radial bearing for preventing a radial movement of the second dynamic seal sleeve are sleeved on the dynamic seal mandreL
[0014] Preferably, a first balance rubber cover is sleeved on the dynamic seal WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 mandrel; an outer side of the first balance rubber cover is an annulus between a drill string and a well wall, and an inner side thereof is in communication with the first dynamic seal group, the upper thrust-stopping bearing, and the upper radial bearing.
[0015] Preferably, a second balance rubber cover is sleeved on the dynamic seal .. mandrel; an outer side of the second balance rubber cover is an annulus between a drill string and a well wall, and an inner side thereof is in communication with the third dynamic seal group, the lower thrust-stopping bearing, and the lower radial bearing.
[0016] Preferably, the connecting ring has a center hole, and two end faces thereof .. are respectively provided with a through groove connected with the central hole and an annular groove connected with the through groove; the through groove corresponds to the annular groove one to one; and two seal rings are sleeved on outside of the connecting ring.
[0017] The structural design of the present invention is reasonable and compact, and the working principle is more advanced, which is beneficial to the miniaturization of the diameter of the steering unit for the rotary steering tool, improves the energy transmission efficiency of the tool, the accuracy of information transmission and the service life of the bearing, improves the performance, stability, and reliability of the rotary steering tool, and extends the service life of the rotary steering tool.
BRIEF DESCRIPTION OF THE DRAWINGS
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly describe technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some of the embodiments described in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings.
[0019] FIG. 1 is a structural diagram of a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
W SLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
W SLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
[0020] FIG. 2 is a structural diagram of a control nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
[0021] FIG. 3 is a structural diagram of an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
[0022] FIG. 4 is a cross-sectional structural view of a double plunger pushing assembly in an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
[0023] FIG. 5 is a cross-sectional structural view of a hydraulic module in an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
[0024] FIG. 6 is a right view of a connecting ring in an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention;
[0025] FIG. 7 is a cross-sectional view of a connecting ring in an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention; and
[0026] FIG. 8 is a left view of a connecting ring in an executive nipple in a steering unit for a static push rotary steering tool provided by an embodiment of the present invention.
[0027] Description of reference signs:
1, control nipple; 2, executive nipple; 3, drill bit; 4, control nipple body;
sleeve; 6, electronic warehouse; 7, circuit board; 8, connector; 9, servo motor; 10, hydraulic module; 11, adjusting ring; 12, erosion resistant cavity; 13, nearing-drill bit measuring probe; 14, oil injection plug; 15, hydraulic oil through hole; 16, seal ring .. assembly; 17, upper mandrel; 18, second hydraulic oil through hole; 19, connecting ring; 20, fifth hydraulic oil through hole; 21, dynamic seal mandrel; 22, first balance rubber cover; 23, first dynamic seal group; 24, first dynamic seal sleeve; 25, non-rotating sleeve; 26, upper thrust-stopping bearing; 27, upper radial bearing; 28, third hydraulic oil through hole; 29, second dynamic seal group; 30, fourth hydraulic oil through hole; 31, double plunger pushing assembly; 32, piston; 33, return spring;
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 34, lubricating oil through hole; 35, cushion block; 36, lower radial bearing;
37, lower thrust-stopping bearing; 38, third dynamic seal group; 39, oil injection plug;
40, third dynamic seal sleeve; 41, second balance rubber cover; 42, second dynamic seal sleeve;
43, lower mandrel; 44, support block; 45, through groove; 46, center hole; 47, seal ring; 48, annular groove.
DETAILED DESCRIPTION OF THE EMBODIMENTS
1, control nipple; 2, executive nipple; 3, drill bit; 4, control nipple body;
sleeve; 6, electronic warehouse; 7, circuit board; 8, connector; 9, servo motor; 10, hydraulic module; 11, adjusting ring; 12, erosion resistant cavity; 13, nearing-drill bit measuring probe; 14, oil injection plug; 15, hydraulic oil through hole; 16, seal ring .. assembly; 17, upper mandrel; 18, second hydraulic oil through hole; 19, connecting ring; 20, fifth hydraulic oil through hole; 21, dynamic seal mandrel; 22, first balance rubber cover; 23, first dynamic seal group; 24, first dynamic seal sleeve; 25, non-rotating sleeve; 26, upper thrust-stopping bearing; 27, upper radial bearing; 28, third hydraulic oil through hole; 29, second dynamic seal group; 30, fourth hydraulic oil through hole; 31, double plunger pushing assembly; 32, piston; 33, return spring;
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 34, lubricating oil through hole; 35, cushion block; 36, lower radial bearing;
37, lower thrust-stopping bearing; 38, third dynamic seal group; 39, oil injection plug;
40, third dynamic seal sleeve; 41, second balance rubber cover; 42, second dynamic seal sleeve;
43, lower mandrel; 44, support block; 45, through groove; 46, center hole; 47, seal ring; 48, annular groove.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings.
[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"
"comprise"
or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device that includes a set of elements includes not only those elements, but also other elements that are not explicitly listed, or that are inherent to such process, method, article, or terminal device. If there are no more restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article, or terminal device that includes the mentioned elements. In addition, here, "greater than", "less than", and "exceed" are understood to not include the number itself; "above", "below", and "within" are understood to include the number itself.
"comprise"
or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device that includes a set of elements includes not only those elements, but also other elements that are not explicitly listed, or that are inherent to such process, method, article, or terminal device. If there are no more restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article, or terminal device that includes the mentioned elements. In addition, here, "greater than", "less than", and "exceed" are understood to not include the number itself; "above", "below", and "within" are understood to include the number itself.
[0030] As shown in FIG. 1, a steering unit for a static push rotary steering tool includes a control nipple 1 and an executive nipple 2 connected in a coaxial way.
[0031] As shown in FIG. 2, the control nipplel includes a control nipple body 4, a sleeve 5, an electronic warehouse 6, a circuit board 7, a connector 8, a hydraulic module 10, an erosion resistant cavity 12, and a nearing-drill bit measuring probe 13.
[0032] As shown in FIG. 3, the executive nipple 2 includes an upper mandrel 17, WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 a connecting ring 19, a dynamic seal mandrel 21, a first dynamic seal group 23, a non-rotating sleeve 25, a double plunger pushing assembly 31, and a lower mandrel 43;
[0033] the sleeve 5 is sleeved outside the control nipple body 4, and a number of electronic warehouses 6 are arranged in the control nipple body 4 and are internally equipped with the circuit board 7; a number of hydraulic modules 10 are arranged in the control nipple body 4, a servo motor 9 in each hydraulic module 10 is connected with a circuit board 7 through the connector 8; the nearing-drill bit measuring probe 13 is placed in the middle of the control nipple body 4; the erosion resistant cavity 12 is arranged in the control nipple body 4 and is close to the nearing-drill bit measuring probe 13;
[0034] the upper mandrel 17 and the lower mandrel 43 are coaxially connected in sequence; a second hydraulic oil through hole 18 is arranged on the upper mandrel 17, the second hydraulic oil through hole 18 is communicated with the hydraulic modules 10, and the lower end thereof is connected with a fifth hydraulic oil through hole 20 through the connecting ring 19. An annular seal cavity formed by the first dynamic seal group 23 is connected with a piston cavity of a piston 32 in the double plunger pushing assembly 31 through a third hydraulic oil through hole 28.
[0035] A lower end of the control nipple body 4 and the upper mandrel 17 of the executive nipple are sealed by a seal ring assembly 16.
[0036] An adjusting ring 11 is provided between one end of the sleeve 5 and the control nipple body 4.
[0037] An oil injection hole is opened on the control nipple body 4 close to the nearing-drill bit measuring probe 13, and an oil injection plug 14 is plugged in the oil injection hole.
[0038] An upper thrust-stopping bearing 26 and an upper radial bearing 27 are sleeved on the dynamic seal mandrel 21. A first dynamic seal sleeve 24, a second dynamic seal sleeve 42, and a third dynamic seal sleeve 40 are sleeved on the dynamic seal mandrel 21. A lower thrust-stopping bearing 37 and a lower radial bearing 36 are sleeved on the dynamic seal mandrel 21.
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
[0039] A first balance rubber cover 22 is sleeved on the dynamic seal mandrel 21;
an outer side of the first balance rubber cover 22 is an annulus between a drill string and a well wall.
an outer side of the first balance rubber cover 22 is an annulus between a drill string and a well wall.
[0040] A second balance rubber cover 41 is sleeved on the dynamic seal mandrel 21; an outer side of the second balance rubber cover 41 is an annulus between the drill string and the well walL
[0041] There are three hydraulic modules 10, and the three hydraulic modules 10 are arranged at 1200 intervals around a central axis of the control nipple body 4.
[0042] There are three sets of double plunger pushing assemblies 31 on the non-rotating sleeve 25, and the three sets of double plunger pushing assemblies 31 are arranged at 120 intervals around a central axis of the non-rotating sleeve 25.
[0043] The connecting ring 19 has a center hole 46, and two end faces of the connecting ring 19 are respectively provided with a through groove 45 connected with the center hole 46 and an annular groove 48 connected with the through groove 45;
the through groove 45 corresponds to the annular groove 48 one to one; and two seal rings 47 are sleeved on the connecting ring 19.
the through groove 45 corresponds to the annular groove 48 one to one; and two seal rings 47 are sleeved on the connecting ring 19.
[0044] As shown in FIG. 1, the upper end of the control nipple 1 is threaded with the drill string, and the lower end thereof is threaded with the upper mandrel 17. The lower mandrel 43 in the executive nipple 2 is connected with the drill bit 3.
[0045] As shown in FIG. 2, a number of electronic warehouses 6 are processed on the control nipple 1, and a circuit board 7 is installed in the electronic warehouse 6;
the circuit board 7 includes such as a power management board, a steering control board, a motor drive board, and a nearing-drill bit measurement board.
the circuit board 7 includes such as a power management board, a steering control board, a motor drive board, and a nearing-drill bit measurement board.
[0046] There are three hydraulic modules 10, which are respectively connected with the double plunger pushing assembly 31 of the executive nipple 2 through a first hydraulic oil through hole 15;
[0047] the nearing-drill bit measuring probe 13 can measure such as well inclination angle, azimuth angle, tool face angle, well bottom pressure, and drill tool vibration of the drill bit.
[0048] The erosion resistant cavity 12 has a characteristic of resistance to erosion WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 caused by drilling fluid. A hydraulic oil is injected into the hydraulic modules 10 and the first hydraulic oil through hole 15 through the oil injection hole at the oil injection plug 14.
[0049] As shown in FIG. 3, a gap between the upper thrust-stopping bearing 26 and the upper radial bearing 27 of the executive nipple 2 is filled with a lubricating oil;
the first dynamic seal group 23 can ensure a dynamic seal of lubricating oil between the dynamic seal mandrel 21 and the first dynamic seal sleeve 24; a gap between the lower thrust-stopping bearing 37 and the lower radial bearing 36 is filled with a lubricating oil; a second dynamic seal group 29 can ensure a dynamic seal of lubricating oil between the dynamic seal mandrel 21 and the second dynamic seal sleeve 42; a third dynamic seal group 38 can ensure a dynamic seal of lubricating oil between the second dynamic seal sleeve 42 and the third dynamic seal sleeve 40.
the first dynamic seal group 23 can ensure a dynamic seal of lubricating oil between the dynamic seal mandrel 21 and the first dynamic seal sleeve 24; a gap between the lower thrust-stopping bearing 37 and the lower radial bearing 36 is filled with a lubricating oil; a second dynamic seal group 29 can ensure a dynamic seal of lubricating oil between the dynamic seal mandrel 21 and the second dynamic seal sleeve 42; a third dynamic seal group 38 can ensure a dynamic seal of lubricating oil between the second dynamic seal sleeve 42 and the third dynamic seal sleeve 40.
[0050] The first balance rubber cover 22 of the executive nipple 2 can adjust pressures inside and outside it, so that a balance between an annulus pressure and a lubricating oil pressure in the first balance rubber cover 22 can be reached;
[0051] The second balance rubber cover 41 of the executive nipple 2 can adjust pressures inside and outside it to achieve balance; the upper thrust-stopping bearing 26, the upper radial bearing 27, the lower radial bearing 36, and the lower thrust-stopping bearing 37 are located in a closed space filled with lubricating oil, which greatly extends the service life of the bearings.
[0052] The three hydraulic modules 10 of the control nipple 1 are distributed at 120 intervals, are respectively composed of the servo motor 9, a hydraulic pump and other components, and are respectively installed in three grooves on the control nipple body 4 of the control nipple 1. As shown in FIG. 5, the three grooves are on a vertical plane of the central axis of the control nipple body 4, and vertical lines passing through midpoints of the bottom edges of the three grooves do not pass through the central axis of the control nipple body 4, which is conducive to reducing the diameter of the control nipple body 4.
[0053] The connecting ring 19 between the upper mandrel 17 and the dynamic seal mandre121 in the executive nipple 2 has two seal rings 47; as shown in FIG. 6 to WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03 FIG. 8, the connecting ring 19 has a center hole 46, and two end faces thereof are respectively provided with the through groove 45 connected with the center hole 46 and the annular groove 48 connected with the through groove 45; the through groove 45 corresponds to the annular groove 48 one to one. Through this structure, the first hydraulic oil through hole 15 and the second hydraulic oil through hole 18 can be communicated; by changing a distance between the annular groove 48 and the axis of the center hole 46, the positions of the second hydraulic oil through hole 18 and the fifth hydraulic oil through hole 20 have greater choice.
[0054] As shown in FIG. 3 and FIG. 4, there are three sets of double plunger pushing assemblies 31 of the executive nipple 2, and the double plunger pushing assemblies 31 are installed on the non-rotating sleeve 25 at an interval of 120 . Each set of double plunger pushing assembly 31 has one support block 44, two pistons 32, two return springs 33 and other components.
[0055] The above-mentioned steering unit for a static push rotary steering tool, has a reasonable and compact structural design, and a more advanced working principle, which is beneficial to the miniaturization of the steering unit for the rotary steering tool, improves the energy transmission efficiency of the tool, the accuracy of information transmission and the service life of the bearing, improves the performance, stability, and reliability of the rotary steering tool, and extends the service life of the rotary steering tool.
[0056] The above only describes some exemplary embodiments of the present invention by way of illustration, and undoubtedly, those of ordinary skill in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as a limitation on the scope of protection of the claims of the present invention.
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
WSLEGAL \ 070171 \ 00020\ 26662148v1 Date recue/Date Received 2021-02-03
Claims (7)
1. A steering unit for a static push rotary steering tool, comprising a control nipple and an executive nipple connected in a coaxial way, wherein the control nipple comprises a control nipple body, a sleeve, an electronic warehouse, a circuit board, a connector, a hydraulic module, an erosion resistant cavity, and a nearing-drill bit measuring probe;
the executive nipple comprises an upper mandrel, a connecting ring, a dynamic seal mandrel, a dynamic seal group, a bearing, a non-rotating sleeve, a double plunger pushing assembly, and a lower mandrel;
the sleeve is sleeved outside the control nipple body, and a number of electronic warehouses are arranged in the control nipple body and are internally equipped with the circuit board for controlling electrical devices in the control nipple; a number of hydraulic modules are arranged in the control nipple body, a servo motor in each hydraulic module is connected with a circuit board through the connector, and each hydraulic module is connected with the double plunger pushing assembly in the executive nipple through a first hydraulic oil through hole on the control nipple body;
the nearing-drill bit measuring probe is placed in a middle of the control nipple body and connected with the circuit board; the erosion resistant cavity is arranged in the control nipple body and is close to the nearing-drill bit measuring probe;
the upper mandrel and the lower mandrel are coaxially connected in sequence, and the upper mandrel is connected with a lower end of the control nipple body; a second hydraulic oil through hole is arranged on the upper mandrel, an upper end of the second hydraulic oil through hole is communicated with the hydraulic modules of the control nipple through the first hydraulic oil through hole, a lower end of the second hydraulic oil through hole is connected with a fifth hydraulic oil through hole on the dynamic seal mandrel through the connecting ring, the fifth hydraulic oil through hole on the dynamic seal mandrel is connected with a third hydraulic oil through hole in the non-rotating sleeve that is sleeved on the dynamic seal mandrel WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03 through an annular seal cavity formed by a first dynamic seal group, the third hydraulic oil through hole on the non-rotating sleeve is connected with a piston cavity of a piston in the double plunger pushing assembly that is sleeved on the non-rotating sleeve.
the executive nipple comprises an upper mandrel, a connecting ring, a dynamic seal mandrel, a dynamic seal group, a bearing, a non-rotating sleeve, a double plunger pushing assembly, and a lower mandrel;
the sleeve is sleeved outside the control nipple body, and a number of electronic warehouses are arranged in the control nipple body and are internally equipped with the circuit board for controlling electrical devices in the control nipple; a number of hydraulic modules are arranged in the control nipple body, a servo motor in each hydraulic module is connected with a circuit board through the connector, and each hydraulic module is connected with the double plunger pushing assembly in the executive nipple through a first hydraulic oil through hole on the control nipple body;
the nearing-drill bit measuring probe is placed in a middle of the control nipple body and connected with the circuit board; the erosion resistant cavity is arranged in the control nipple body and is close to the nearing-drill bit measuring probe;
the upper mandrel and the lower mandrel are coaxially connected in sequence, and the upper mandrel is connected with a lower end of the control nipple body; a second hydraulic oil through hole is arranged on the upper mandrel, an upper end of the second hydraulic oil through hole is communicated with the hydraulic modules of the control nipple through the first hydraulic oil through hole, a lower end of the second hydraulic oil through hole is connected with a fifth hydraulic oil through hole on the dynamic seal mandrel through the connecting ring, the fifth hydraulic oil through hole on the dynamic seal mandrel is connected with a third hydraulic oil through hole in the non-rotating sleeve that is sleeved on the dynamic seal mandrel WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03 through an annular seal cavity formed by a first dynamic seal group, the third hydraulic oil through hole on the non-rotating sleeve is connected with a piston cavity of a piston in the double plunger pushing assembly that is sleeved on the non-rotating sleeve.
2. The steering unit for a static push rotary steering tool according to claim 1, wherein the lower end of the control nipple body and the upper mandrel of the executive nipple are sealed by a seal ring assembly.
3. The steering unit for a static push rotary steering tool according to claim 1, wherein an adjusting ring is provided between one end of the sleeve and the control nipple body.
4. The steering unit for a static push rotary steering tool according to claim 1, wherein an upper thrust-stopping bearing for preventing an axial movement of the non-rotating sleeve and an upper radial bearing for preventing a radial movement of the non-rotating sleeve are sleeved on the dynamic seal mandrel; a first dynamic seal sleeve, a second dynamic seal sleeve, and a third dynamic seal sleeve are sleeved on the dynamic seal mandrel; the first dynamic seal sleeve, the second dynamic seal sleeve, and the third dynamic seal sleeve are respectively sealed with the dynamic seal mandrel through the first dynamic seal group, a second dynamic seal group, and a third dynamic seal group; a lower thrust-stopping bearing for preventing an axial movement of the second dynamic seal sleeve and a lower radial bearing for preventing a radial movement of the second dynamic seal sleeve are sleeved on the dynamic seal mandrel.
5. The steering unit for a static push rotary steering tool according to claim 4, wherein a first balance rubber cover is sleeved on the dynamic seal mandrel;
an outer side of the first balance rubber cover is an annulus between a drill string and a well wall, and an inner side thereof is in communication with the first dynamic seal group, the upper thrust-stopping bearing, and the upper radial bearing.
an outer side of the first balance rubber cover is an annulus between a drill string and a well wall, and an inner side thereof is in communication with the first dynamic seal group, the upper thrust-stopping bearing, and the upper radial bearing.
6. The steering unit for a static push rotary steering tool according to claim 4, wherein a second balance rubber cover is sleeved on the dynamic seal mandrel;
an outer side of the second balance rubber cover is an annulus between a drill string and WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03 a well wall, and an inner side thereof is in communication with the third dynamic seal group, the lower thrust-stopping bearing, and the lower radial bearing.
an outer side of the second balance rubber cover is an annulus between a drill string and WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03 a well wall, and an inner side thereof is in communication with the third dynamic seal group, the lower thrust-stopping bearing, and the lower radial bearing.
7. The steering unit for a static push rotary steering tool according to claim 1, wherein the connecting ring has a center hole, and two end faces thereof are respectively provided with a through groove connected with the central hole and an annular groove connected with the through groove; the through groove corresponds to the annular groove one to one; and two seal rings are sleeved on outside of the connecting ring.
WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03
WSLEGAL\070171\00020\26662148v1 Date recue/Date Received 2021-02-03
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010090566.3A CN111270992B (en) | 2020-02-13 | 2020-02-13 | Guide unit for static pushing type rotary guide tool |
| CN202010090566.3 | 2020-02-13 |
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| Publication Number | Publication Date |
|---|---|
| CA3107988A1 true CA3107988A1 (en) | 2021-08-13 |
| CA3107988C CA3107988C (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CA3107988A Active CA3107988C (en) | 2020-02-13 | 2021-02-03 | Steering unit for static push rotary steering tool |
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| Country | Link |
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| CN (1) | CN111270992B (en) |
| CA (1) | CA3107988C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963156B (en) * | 2020-08-28 | 2024-02-09 | 天津中探微科科技有限公司 | Underground wireless measurement while drilling probe for coal mine |
| CN113585968B (en) * | 2021-06-25 | 2024-06-07 | 北京六合伟业科技股份有限公司 | Non-contact pushing type vertical guiding system for rib and well wall |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525872B (en) * | 2014-09-29 | 2018-03-09 | 中国石油化工集团公司 | Static pushing type rotary guiding device |
| US20170107762A1 (en) * | 2015-10-20 | 2017-04-20 | Weatherford Technology Holdings, Llc | Pulsating Rotary Steerable System |
| US9624727B1 (en) * | 2016-02-18 | 2017-04-18 | D-Tech (Uk) Ltd. | Rotary bit pushing system |
| WO2018212776A1 (en) * | 2017-05-18 | 2018-11-22 | Halliburton Energy Services, Inc. | Rotary steerable drilling - push-the-point-the-bit |
| CN108894729B (en) * | 2018-09-18 | 2024-01-30 | 中国石油天然气集团有限公司 | Hydraulic pushing type rotary guiding tool |
| CN109356524A (en) * | 2018-10-27 | 2019-02-19 | 裴绪建 | A kind of static, pushing type hydraulic rotating guide drilling tool |
| CN110067510B (en) * | 2019-05-28 | 2020-07-28 | 西南石油大学 | Push-against type rotary steering drilling tool |
| CN110725649A (en) * | 2019-12-09 | 2020-01-24 | 长江大学 | Push-leaning type rotary guiding tool |
-
2020
- 2020-02-13 CN CN202010090566.3A patent/CN111270992B/en active Active
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- 2021-02-03 CA CA3107988A patent/CA3107988C/en active Active
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| Publication number | Publication date |
|---|---|
| CN111270992A (en) | 2020-06-12 |
| CN111270992B (en) | 2020-10-27 |
| CA3107988C (en) | 2022-10-18 |
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