CN114876366A - Pump pressure controlled drill string composite drilling state controller - Google Patents
Pump pressure controlled drill string composite drilling state controller Download PDFInfo
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- CN114876366A CN114876366A CN202210511285.XA CN202210511285A CN114876366A CN 114876366 A CN114876366 A CN 114876366A CN 202210511285 A CN202210511285 A CN 202210511285A CN 114876366 A CN114876366 A CN 114876366A
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- 238000005553 drilling Methods 0.000 title claims abstract description 117
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 125000006850 spacer group Chemical group 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims description 20
- 229910045601 alloy Inorganic materials 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 10
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 description 12
- 230000005484 gravity Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
Abstract
The invention relates to a pump pressure controlled drill string composite drilling state controller, comprising: the device comprises an upper joint, an upper TC assembly, a semi-ring, a pressure bearing sleeve, a spacer bush, a string bearing, a lower TC assembly, a central shaft assembly, a baffle ring, a radial piston, a functional spring, a baffle plate, a return spring, a shell assembly, a piston assembly and a lower joint. The upper core shaft, the function conversion shaft and the lower core shaft form a shell component. When the pump pressure is small, the return spring is in a natural state, the functional spring is in a compressed state, the radial piston is matched with the blind hole of the middle and outer shells, and when the upper drill string drives the upper joint and the central shaft assembly to synchronously rotate, the outer shell assembly and the lower joint rotate under the torque provided by the radial piston; after the pump pressure is increased, the piston assembly compresses the return spring downwards, the radial piston is separated from the blind hole of the middle shell under the action of the return force of the functional spring and matched with the blind hole of the middle shell, and when the upper drill stem drives the upper joint to rotate with the central shaft assembly, the shell assembly and the lower joint keep the same state but do not rotate.
Description
Technical Field
The invention relates to a drill string composite drilling state controller for pump pressure control in the field of drilling engineering, which is mainly applied to the fields of petroleum and natural gas drilling engineering, geological exploration, geothermal energy, novel oil and gas resource exploitation and the like.
Background
Directional drilling is a drilling process method for drilling a well bore to a target layer along a pre-designed direction and track, and the existing directional drilling technology is divided into a bent screw rod directional drilling technology and a rotary steering technology. The curved screw rod orientation has low cost, belongs to sliding orientation, easily causes serious dragging and pressing of a drill column, has low drilling efficiency and mechanical drilling speed, is not easy to control a well track, and is not easy to discharge drilling cuttings after being accumulated. The rotary steering RSS working mode is rotary drilling, the drilling efficiency is greatly improved, but the manufacturing, using and maintaining costs are too high, and if the rotary steering RSS is stuck, the risk of being buried is high, and the economic loss is large.
Therefore, the characteristics of low cost of bending screw rod orientation and high efficiency of rotary steering RSS are synthesized, and compared with the prior orientation technology, the pumping pressure controlled drill string composite drilling state controller can greatly reduce the friction resistance of the well wall, improve the effective drilling pressure, the mechanical drilling speed and the drilling efficiency, and has the characteristics of high reliability, small risk, low accident handling cost and the like.
The pump pressure controlled drill string composite drilling state controller can realize rotary drilling, and drill string rotary drilling and BHA sliding drilling during directional drilling. The pumping pressure controlled drill column composite drilling state controller can improve the directional drilling efficiency; the cost is greatly reduced; and the safety is high, and the accident handling cost is low.
Disclosure of Invention
The invention provides a pumping pressure controlled drill string composite drilling state controller, aiming at solving the problems that the drilling efficiency and the drilling speed are low during directional sliding drilling, the well track is not easy to control, the rotary drilling cost is high, the risk of being buried when sticking a drill is high and the like in the background technology. The invention can reduce the fluctuation of the drilling pressure during drilling and simultaneously realize the independent movement of a Bottom Hole Assembly (BHA) and a drill pipe. When the composite drilling is carried out, the drill column system and the BHA are jointly rotated and drilled; when directional drilling is performed, the upper drill string is rotated and the BHA is slid. The directional well engineer can realize the composite drilling and the sliding drilling by controlling the motion state conversion of the drill stem composite drilling state controller controlled by the pump pressure.
The technical scheme of the invention is as follows: the composite drilling state controller of the drill string controlled by the pump pressure comprises a piston assembly consisting of an upper piston and a lower piston and a radial piston contacted with the piston, wherein the upper end of the piston assembly is limited by a baffle ring, the lower end of the piston assembly is limited by a return spring, one end of the radial piston is limited by a functional spring, and the other end of the radial piston is limited by a contacted piston assembly; the reset spring has enough rigidity, the total weight of the piston assembly is not enough to compress the reset spring to act, and the reset spring is limited by the lower mandrel; the functional spring has enough rigidity, is not compressed by the gravity of the radial piston in the horizontal drilling process, and is fixedly connected with the baffle; the blocking ring and the function conversion shaft are in interference fit, the reset spring is prevented from bearing the overlarge total pressure of the upper tool to lose efficacy while the upper limit position of the piston assembly is limited, the aperture of the blocking ring is larger than that of the piston assembly, so that drilling fluid can be in direct contact with the piston assembly, and the piston assembly can compress the reset spring to act under the pumping pressure value when acting.
In the pumping pressure controlled drill string composite drilling state controller, the lower mandrel is connected with the function conversion shaft through threads, the function conversion shaft is connected with the upper mandrel through threads, the lower mandrel, the function conversion shaft and the upper mandrel form a central shaft assembly, the central shaft assembly is connected with the upper joint through threads, and synchronous rotation of the central shaft assembly and the upper joint is ensured; the function conversion shaft is assembled in the middle shell; well shell connects the shell on, under through threaded connection's mode, and shell and upper housing constitute shell subassembly down, and lower shell assembles through threaded connection's mode and lower clutch, and shell subassembly and lower clutch motion state's unanimity has been guaranteed to threaded connection's mode.
In the pump pressure controlled drill string composite drilling state controller, the central shaft assembly comprises an upper core shaft, a function switching shaft and a lower core shaft, the function switching shaft realizes axial limiting through a middle and outer shell, the upper core shaft can be prevented from being separated from the pump pressure controlled drill string composite drilling state controller in the drill tripping process after the function switching shaft and the upper core shaft are assembled, and the function switching shaft and the lower core shaft are not of an integrated structure, so that the assembly of a return spring and a piston assembly is convenient.
In the above pump pressure controlled drill string composite drilling state controller of the present invention, the housing assembly comprises an upper housing, a middle housing, and a lower housing, wherein the middle housing and the lower housing are not an integral structure, which facilitates assembly of the radial piston; the radial blind hole of the middle shell and the radial through hole of the function conversion shaft are close to the axial bottom ends of the radial blind hole and the radial through hole, and convenience is provided for assembling the radial piston.
In the above-mentioned pump pressure controlled drill string composite drilling state controller of the present invention, the upper mandrel is assembled with the half ring, the pressure bearing sleeve and the spacer sleeve, the half ring and the spacer sleeve are connected with the upper TC assembly, the upper TC assembly is assembled by the upper TC bearing moving coil, the upper TC bearing static coil, the upper TC static coil alloy and the upper TC moving coil alloy, and the upper TC assembly is axially limited by the upper housing, the half ring and the spacer sleeve; the bearing sleeve and the spacer sleeve are connected with the serial bearing in a downward connecting mode, the serial bearing is connected with the downward TC component in a downward connecting mode, the downward TC component is formed by assembling the downward TC bearing static ring, the downward TC static ring alloy, the downward TC moving ring alloy and the downward TC bearing moving ring, and the downward TC component is axially limited by the upper shell and the middle shell.
In the above-mentioned pump pressure controlled drill string composite drilling state controller of the present invention, the placement position relationship during drilling is, in turn, an upper drill string, a pump pressure controlled drill string composite drilling state controller, MWD, and BHA (bottom hole assembly), wherein the upper drill string is assembled with an upper joint in the pump pressure controlled drill string composite drilling state controller by threaded connection, and the lower joint, MWD, and BHA in the pump pressure controlled drill string composite drilling state controller are assembled by threaded connection in turn.
In the above-mentioned pump pressure controlled drill string composite drilling state controller of the present invention, the achievement of the drill string drilling state switching function is controlled by the relative position relationship between the piston assembly and the radial piston, which is specifically represented as: when the pumping pressure is small, the drilling fluid pressure and the gravity of the piston assembly are not enough to compress the return spring to act, the return spring is in a natural state, the functional spring is in a compressed state, the radial piston is matched with a blind hole of a middle outer shell, when an upper drill string drives the upper connector to rotate, the upper connector drives the middle mandrel assembly to rotate, the shell assembly can rotate under the torque action provided by the matched radial piston, the shell assembly rotates to drive the lower connector to synchronously rotate, and then the lower connector drives the MWD and the BHA to synchronously rotate; after the pumping pressure is increased, when the drilling fluid pressure and the gravity of the piston assembly can compress the return spring to act, the piston assembly compresses the return spring downwards, the radial piston is gradually separated from the fit with the middle shell under the action of the return force of the functional spring, after the piston assembly compresses the return spring to the lower limit position, the radial piston is completely separated from the fit with the middle shell, when the upper drill string drives the upper connector to rotate, and when the upper connector drives the central shaft assembly to rotate, the shell assembly, the lower connector, the MWD and the BHA keep the same state but do not rotate.
The invention has the beneficial effects that: (1) the pumping pressure controlled drill string composite drilling state controller realizes the conversion of the drilling state by changing the pumping pressure, can realize the completion of the directional sliding drilling of the BHA when the drill rod continuously rotates, reduces the risk of drilling sticking and is beneficial to the cleaning of a well hole; (2) during orientation, the high-efficiency conversion of BHA rotary drilling and sliding drilling is realized, (3) the drilling pressure friction resistance can be reduced, the viscosity is reduced, the sticking is prevented, the mechanical drilling speed is improved, and the service life of a drilling tool is prolonged; (4) the drilling fluid medium used in the pumping pressure conversion process is convenient to use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the piston assembly;
fig. 3 is a schematic view of the structure of a radial piston.
In the figure, 1, an upper joint, 2, an upper mandrel, 3, an upper TC bearing moving coil, 4, an upper TC bearing static coil, 5, an upper TC static coil alloy, 6, an upper TC moving coil alloy, 7, an upper shell, 8, a half ring, 9, a pressure bearing sleeve, 10, a spacer sleeve, 11, a series bearing, 12, a lower TC bearing static coil, 13, a lower TC static coil alloy, 14, a lower TC moving coil alloy, 15, a lower TC bearing moving coil, 16, a middle shell, 17, a function conversion shaft, 18, a baffle ring, 19, an upper piston, 20, a lower piston, 21, a radial piston, 22, a function spring, 23, a baffle plate, 24, a lower mandrel, 25, a return spring, 26, a lower shell and 27, a lower joint are arranged.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
the invention relates to a pump pressure controlled drill string composite drilling state controller provided with a throttling control piston assembly and a function conversion assembly, wherein the change of the drilling state of a drill string is ensured by the change of the position relation of the throttling control piston assembly and the function conversion assembly.
Referring to fig. 1, the pump pressure controlled drill string composite drilling state controller is assembled in the following order: assembling a lower TC bearing static ring 12, a lower TC static ring alloy 13, a lower TC moving ring alloy 14 and a lower TC bearing moving ring 15 into a lower TC assembly, assembling the assembled lower TC assembly into an upper shell 7, then assembling a string bearing 11 above the lower TC assembly, and then assembling a spacer bush 10 above the string bearing 10; assembling an upper TC assembly by an upper TC bearing moving coil 3, an upper TC bearing static coil 4, an upper TC static coil alloy 5 and an upper TC moving coil alloy 6, then assembling the upper TC assembly with an upper mandrel 2 from the lower part of the upper mandrel 2, then installing a semi-ring 8 on the upper mandrel 2, assembling a pressure-bearing sleeve 9 with the upper mandrel 2 from the lower end of the upper mandrel 2, and then assembling the assembled upper TC assembly with an upper shell 7; assembling the middle shell 16 and the upper shell 7 together, assembling the baffle ring 18 and the function conversion shaft 17 together in an interference fit mode, assembling the baffle plate 23 fixedly connected with the function spring 22 and the function conversion shaft 17 together through a radial end surface hole of the function conversion shaft 17, assembling the function conversion shaft 17 into the middle shell 16, assembling the function conversion shaft 17 and the upper mandrel 2 through threaded connection, then assembling the upper piston 19 into the function conversion shaft 17, realizing positioning through the baffle ring 18, assembling the radial piston 21 and a radial blind hole of the middle shell 16 together, and then assembling the lower piston 20 and the upper piston 19 together; the return spring 25 is assembled below the lower piston 20, then the lower core shaft 24 is assembled with the function switching shaft 17, and then the lower shell 26 is assembled with the middle shell 16; finally, the lower joint 27 and the lower shell 26 are assembled together, the upper joint 1 and the upper mandrel 2 are assembled together, and the pumping pressure controlled drill string composite drilling state controller is completely assembled.
The switching of the drilling state of the drill string is ensured by the relative position relationship between the piston assembly and the radial piston 21, so that the axial big end of the radial piston 21 is designed into an inclined plane, and the piston assembly is designed into a conical surface, so that the relative movement of the piston assembly and the radial piston 21 is ensured, the radial piston 21 and the middle shell 16 are ensured to be matched and separated, and the central shaft assembly and the shell assembly are further controlled to synchronously rotate or not, namely the switching of the drilling state of the drill string. The middle shell 16 and the lower shell 26 in the shell assembly are not designed into an integrated structure, so that the problems that the radial piston 21 is not easy to assemble and the vertical relation with the function conversion shaft 17 and the middle shell 16 is not easy to guarantee during assembly are solved. The function transfer shaft 17 and the lower spindle 24 in the central shaft assembly are not designed to be an integral structure because the installation problems of the piston assembly, the return spring 25, the baffle ring 18, the radial piston 21 and other parts are considered. The radial hole of the function conversion shaft 17 is closer to the lower end face of the function conversion shaft 17, so that the radial piston 21 and the baffle plate 23 fixedly connected with the function spring 22 can be assembled conveniently.
The stop ring 18 and the function switching shaft 17 are in interference fit, so that the stop ring 18 is used for controlling the upper limit position of the piston assembly and the positioning when the upper piston 19 is assembled, and the condition that the drilling state switching of the drill string is influenced after the return spring 25 at the lower end of the piston assembly fails after bearing the overlarge total gravity of the upper drill string is avoided, so that the return spring 25 only bears the resultant force of the gravity of the piston assembly and the drilling fluid pressure, wherein the return spring 25 has enough rigidity, and when the resultant force of the gravity of the piston assembly and the drilling fluid pressure reaches the value of compressing the return spring 25, the return spring 25 is compressed.
The pump pressure controlled drill string composite drilling state controller is used for sequentially arranging the following positions during drilling: the drilling string composite drilling state controller comprises an upper drilling string, a pumping pressure controlled drilling string composite drilling state controller, an MWD (measurement while drilling) controller and a BHA (drilling bottom hole), wherein the specific assembling mode is as follows: the upper connector 1 of the pump pressure controlled drill string composite drilling state controller is connected with an upper drill string through threads, the lower connector 27 and the lower connector 27 of the pump pressure controlled drill string composite drilling state controller are connected with the MWD and the MWD lower BHA through threads, and the lower connector 27 and the MWD and the BHA are assembled through threaded connection.
A drilling string composite drilling state controller controlled by pump pressure is characterized in that in a normal state, a return spring 25 is in a natural state, a piston assembly is in an upper limit position, a functional spring 22 is in a compression state, a radial piston 21 is matched with a radial blind hole of a middle outer shell 11, when an upper drilling string drives an upper connector 1 to synchronously rotate, the upper connector 1 drives a central shaft assembly to synchronously rotate, a shell assembly synchronously rotates under torque applied by the radial piston 21, meanwhile, the shell assembly drives a lower connector 27 to synchronously rotate, the lower connector 27 drives MWD and BHA to synchronously rotate, and at the moment, the drilling state of the BHA is rotary drilling. The conversion of the drilling state of the drill stem needs to be judged according to the working condition at the bottom of the well, relevant working condition parameters are measured by MWD and then fed back to a ground computer, when the measured drilling state of the BHA needs to be rotary drilling, the existing pump pressure is kept unchanged, and the rotary drilling state is maintained; when the measured BHA drilling state needs sliding drilling, the pump pressure is increased, and when the pressure of the drilling fluid is enough to push the piston assembly to press down the return spring 25, the pump pressure is maintained, so that the failure of the return spring 25 under the gravity of the piston assembly and the overlarge drilling fluid pressure is avoided, and in the process that the drilling fluid pushes the piston assembly to press down the return spring 25, the radial pistons 21 are gradually disengaged from the middle housing 16 by the restoring force of the functional springs 25, after completely disengaging, the upper drill string drives the upper joint 1 to rotate synchronously, the upper joint 1 drives the central shaft assembly to rotate synchronously, the movement of the housing assembly is not influenced by the movement of the central shaft assembly, the housing assembly does not rotate, the lower joint 27 in threaded connection with the housing assembly does not rotate, thus, the MWD, and BHA threaded with the MWD, threaded with lower coupling 27, does not rotate, and the progress of the BHA forward drilling is therefore sliding drilling. In the drilling process, real-time data of the MWD is fed back to a ground computer at any time, when the working condition state needs sliding drilling, the sliding drilling state is maintained, when the working condition state needs to be changed into the rotary drilling state, the pump pressure is reduced, the piston assembly gradually moves upwards under the restoring force of the return spring 25, the radial piston 21 gradually compresses the functional spring 22, the radial piston 21 is gradually matched with the middle outer shell 16, when the piston assembly moves to the upper limit position, namely the piston assembly moves to the position contacted with the retainer ring 18, the radial piston 21 and the middle outer shell 16 are completely in the matched state, the return spring 25 returns to the natural state, and the upper drill string rotates to finally drive the rotary drilling.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The pump pressure controlled drill string composite drilling state controller is characterized in that: the device comprises an upper joint (1), an upper mandrel (2), an upper TC bearing moving coil (3), an upper TC bearing static coil (4), an upper TC static coil alloy (5), an upper TC moving coil alloy (6), an upper shell (7), a half ring (8), a pressure-bearing sleeve (9), a spacer sleeve (10), a serial bearing (11), a lower TC bearing static coil (12), a lower TC static coil alloy (13), a lower TC moving coil alloy (14), a lower TC bearing moving coil (15), a middle and outer shell (16), a function conversion shaft (17), a baffle ring (18), an upper piston (19), a lower piston (20), a radial piston (21), a function spring (22), a baffle plate (23), a lower mandrel (24), a reset spring (25), a lower shell (26) and a lower joint (27); an upper TC assembly is assembled by an upper TC bearing moving coil (3), an upper TC bearing static coil (4), an upper TC static coil alloy (5) and an upper TC moving coil alloy (6), and a lower TC assembly is assembled by a lower TC bearing static coil (12), a lower TC static coil alloy (13), a lower TC moving coil alloy (14) and a lower TC bearing moving coil (15); the upper mandrel (2), the function conversion shaft (17) and the lower mandrel (24) form a central shaft assembly, the upper shell (7), the middle shell (16) and the lower shell (26) form a shell assembly, and the upper piston (19) and the lower piston (20) form a piston assembly; the upper shell (7) is connected with an upper TC assembly, the upper mandrel (2) is assembled with the upper TC assembly, the half ring (8) and the pressure-bearing sleeve (9), the lower half ring (8) and the spacer sleeve (10) are connected with the upper TC assembly, the pressure-bearing sleeve (9) and the spacer sleeve (10) are connected with the bearing (11) in series, the lower TC assembly is connected with the lower middle shell (16) in series, and the lower shell (26) and the lower joint (27) are connected with the lower middle shell (16) in series; the upper mandrel (2) is connected with an upper joint (1) and a lower function conversion shaft (17) in an upper connection mode, the function conversion shaft (17) is connected with a lower mandrel (24) in a lower connection mode, the lower mandrel (24) is connected with a return spring (25) in an upper connection mode, the return spring (25) is connected with a piston assembly, and the piston assembly is connected with a stop ring (18); the baffle (23) is assembled with the function conversion shaft (17), and the function spring (22) is fixedly connected with the baffle (23); when the pump pressure of the drilling pump is small, the piston assembly is connected with the retaining ring (18), the return spring (25) is in a natural state, the radial piston (21) is matched with the radial blind hole of the middle outer shell (16), the functional spring (22) is in a compressed state, and the upper joint (1) drives the central shaft assembly to rotate and simultaneously drives the outer shell assembly and the lower joint (27) to rotate together; when the pump pressure of the drilling pump is large, the piston assembly presses down the reset spring (25) under the action of the pressure of drilling fluid to keep away from the retaining ring (18), the radial piston (21) is gradually separated from the matching with the radial blind hole of the middle shell (16), the functional spring (22) extends under the action of restoring force, and after the radial piston (21) is completely separated from the matching with the radial blind hole of the middle shell (16), the shell assembly does not rotate with the lower joint (27) when the upper joint (1) drives the central shaft assembly to rotate.
2. The pump pressure controlled drill string composite drilling condition controller of claim 1, wherein: the upper joint (1) is in threaded connection with the upper mandrel (2), the upper mandrel (2) is in threaded connection with the function conversion shaft (17), and the function conversion shaft (17) is in threaded connection with the lower mandrel (24), so that synchronous rotation of the upper joint (1) and the central shaft assembly is guaranteed; the upper shell (7) and the middle shell (16) are in threaded connection, the middle shell (16) and the lower shell (26) are in threaded connection, and the lower shell (26) and the lower joint (27) are in threaded connection, so that the same motion state of the lower joint (27) and the shell component is ensured.
3. The pump pressure controlled drill string composite drilling condition controller of claim 1, wherein: the rigidity of the return spring (25) is enough, the return spring (25) is guaranteed not to be compressed under the total weight of the piston assembly, and the switching of the drilling state of the drill string is prevented from being influenced.
4. The pump pressure controlled drill string composite drilling condition controller of claim 1, wherein: the stop ring (18) and the function conversion shaft (17) are in interference fit, the upper limit position of the piston assembly is guaranteed, and meanwhile the piston assembly is convenient to position when the upper piston (19) is assembled.
5. The pump pressure controlled drill string composite drilling condition controller of claim 1, wherein: the piston assembly is divided into an upper piston (19) and a lower piston (20) and aims at facilitating assembly, and the assembly sequence of the upper piston (19), the lower piston (20) and a radial piston (21) is that the upper piston (19) is assembled into a function conversion shaft (17), then the radial piston (21) and a radial hole of the function conversion shaft (17) are assembled together, and then the lower piston (20) and the upper piston (19) are assembled into the piston assembly.
6. The pump pressure controlled drill string composite drilling condition controller of claim 1, wherein: the shell assembly comprises a middle shell (16) and a lower shell (26), wherein the middle shell (16) and the lower shell (26) are not designed into an integrated structure, so that the vertical relation between a radial blind hole of the middle shell (16) and a radial hole of the function conversion shaft (17) and a radial piston (21) during assembly is ensured; the radial hole of the function conversion shaft (17) is close to the lower end face of the function conversion shaft (17), so that the radial piston (21), the function spring (22) and the baffle (23) are convenient to assemble.
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| CN202210511285.XA CN114876366B (en) | 2022-05-11 | 2022-05-11 | Pump pressure controlled drill string composite drilling state controller |
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| CN202210511285.XA CN114876366B (en) | 2022-05-11 | 2022-05-11 | Pump pressure controlled drill string composite drilling state controller |
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| CN114876366B CN114876366B (en) | 2024-01-19 |
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| CN108952578A (en) * | 2018-07-20 | 2018-12-07 | 西南石油大学 | A kind of drilling remote control variable gauge stabilizer |
| CN112360350A (en) * | 2020-12-10 | 2021-02-12 | 西南石油大学 | Mechanical rotary guiding drilling tool |
| CN114109252A (en) * | 2021-11-18 | 2022-03-01 | 西南石油大学 | Control device for realizing full rotation orientation of drill column |
| CN114109251A (en) * | 2021-11-18 | 2022-03-01 | 西南石油大学 | Control device and use method of composite directional drilling |
| CN114109250A (en) * | 2021-11-18 | 2022-03-01 | 西南石油大学 | Controller for realizing drill column full-rotation composite orientation |
| CN114110035A (en) * | 2022-01-27 | 2022-03-01 | 合力（天津）能源科技股份有限公司 | Hydraulic clutch |
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