CN114482888B - Underground electrohydraulic control active pressurizer - Google Patents
Underground electrohydraulic control active pressurizer Download PDFInfo
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- CN114482888B CN114482888B CN202111580579.XA CN202111580579A CN114482888B CN 114482888 B CN114482888 B CN 114482888B CN 202111580579 A CN202111580579 A CN 202111580579A CN 114482888 B CN114482888 B CN 114482888B
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- 238000005553 drilling Methods 0.000 claims abstract description 31
- 230000007704 transition Effects 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 76
- 239000010720 hydraulic oil Substances 0.000 description 18
- 238000004891 communication Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
Abstract
The invention provides a downhole electrohydraulic control active pressurizer, which comprises an inner mandrel and an outer shell, wherein the inner mandrel is sleeved outside the outer shell, the outer shell comprises an upper shell and a lower shell (5) which are arranged up and down, an upper slip mechanism, a lower slip mechanism and an electrohydraulic control mechanism are arranged between the inner mandrel and the outer shell, the upper slip mechanism is connected with the upper shell, the lower slip mechanism is connected with the lower shell (5), the electrohydraulic control mechanism can control the upper slip mechanism and the lower slip mechanism to work, and the electrohydraulic control mechanism can enable the lower shell (5) to be close to or far away from the upper shell. The underground electro-hydraulic active pressurizer can actively load the drilling pressure in the underground when the drilling work of the deep well, the high-inclination well and the horizontal well with the cable-type continuous pipe faces the problems of pressure supporting, difficulty in adding the drilling pressure to the ground and the like.
Description
Technical Field
The invention relates to the field of petroleum exploitation equipment, in particular to a downhole electro-hydraulic active pressurizer.
Background
With the development of coiled tubing drilling technology, the localization of coiled tubing is raised, the use cost of coiled tubing products is greatly reduced, and the operations of coiled tubing operation, fracturing, well repair and well drilling are carried out in large oil fields and drilling companies in China, wherein the coiled tubing operation, fracturing and well repair are already popularized in the market, and the coiled tubing drilling is also currently carried out in technical attack and field test.
The field test is also carried out in China at present on the cabled continuous pipe drilling, wherein an electrohydraulic control active pressurizer tool and an electric control director realize domestic and field application, the cabled continuous pipe drilling is realized due to the appearance of the electrohydraulic control active pressurizer tool and the electric control director, however, the cabled continuous pipe drilling is subjected to the problems of pressure supporting, difficulty in adding drilling pressure and the like when the cabled continuous pipe is used for drilling deep wells, high-inclination wells and horizontal wells, and the phenomenon restricts the further development and market application of the cabled continuous pipe drilling.
Disclosure of Invention
In order to solve the problem that the drilling pressure of the coiled tubing is difficult, the invention provides an underground electro-hydraulic active pressurizer, which can actively load the drilling pressure in the underground when the drilling work of a deep well, a high inclination well and a horizontal well with a cable coiled tubing faces the problems of pressure supporting, difficult ground pressure adding and the like.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an electric hydraulic control initiative presser in pit, includes interior dabber and the shell body that interior overcoat was established, the shell body contains upper housing and lower casing that sets up from top to bottom, be equipped with slips mechanism, slips mechanism and electric hydraulic control mechanism down between inner spindle and the shell body, go up slips mechanism with it is connected to go up the casing, slips mechanism is connected with lower casing down, electric hydraulic control mechanism can control go up slips mechanism and slips mechanism work down, electric hydraulic control mechanism can also make down the casing be close to or keep away from for last casing.
The beneficial effects of the invention are as follows: the underground electrohydraulic control active pressurizer solves the problems of pressure supporting and pressure loading of a cabled continuous pipe drilling, uses an electric control liquid to drive the internal structure of the tool to move, achieves the purpose of underground active pressurization, can pass through a cable, and provides an electric interface for a lower tool, and is safe and reliable.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is an overall schematic of a downhole electro-hydraulic active pressurizer according to the present invention.
FIG. 2 is a schematic view of a first section of the downhole electro-hydraulic active pressurizer depicted in FIG. 1, from top to bottom.
FIG. 3 is a schematic view of a second section of the downhole electro-hydraulic active pressurizer depicted in FIG. 1 from above.
FIG. 4 is a schematic view of a third section of the downhole electro-hydraulic active pressurizer depicted in FIG. 1 from above.
FIG. 5 is a schematic view of a fourth section of the downhole electro-hydraulic active pressurizer depicted in FIG. 1 from above.
FIG. 6 is a schematic view of a fifth section of the downhole electro-hydraulic active pressurizer depicted in FIG. 1 from above.
Fig. 7 is a schematic view of an inner mandrel.
Fig. 8 is a schematic view of a plurality of sealed cavities formed between an inner mandrel and an outer housing.
FIG. 9 is a schematic of a cable passage in the downhole electro-hydraulic active pressurizer.
FIG. 10 is a schematic of the drilling fluid passage in the downhole electro-hydraulic active pressurizer.
Fig. 11 is a schematic diagram of the hydraulic oil passages in the downhole electro-hydraulic active pressurizer.
Fig. 12 is a schematic view of the upper slips in a retracted configuration.
Fig. 13 is a schematic view of the upper slips extended.
Fig. 14 is a schematic view of the structure of the lower housing in a retracted state.
Fig. 15 is a schematic view of the structure of the lower case in an extended state.
1. An upper joint; 2. an upper housing; 3. an intermediate housing; 4. a transition joint; 5. a lower housing; 6. a lower joint; 7. a male plug; 8. a male socket; 9. an upper mandrel; 10. an upper slip; 11. an upper piston; 12. a control unit; 13. a lower core shaft; 14. a motor; 15. an oil pump; 16. a hydraulic valve block; 17. a middle piston; 18. a lower piston; 19. a lower slip; 20. a female socket; 21. a female plug; 22. sealing the plugs; 23. a hydraulic oil pipe joint; 24. a return spring; 25. a gland is arranged; 26. a lower gland;
201. a first boss; 202. a second boss; 203. a third boss; 204. a fourth boss; 205. a fifth boss; 206. a sixth boss; 207. a first upper axial bore; 208. a second upper axial bore; 209. a first lower axial bore; 2010. a second lower axial bore; 2011. a third lower axial bore; 2012. a first axial groove through hole; 2013. a second axial trench through hole; 2014. a first radial trench through hole; 2015. a second radial trench through hole; 2016. a third radial trench through hole; 2017. a fourth radial trench through hole; 2018. a fifth radial trench through hole; 2019. a sixth radial trench through hole; 2020. a seventh radial trench through hole; 2021. an eighth radial trench through hole; 2022. a ninth radial trench through hole;
301. a spring resetting cabin is arranged; 302. an upper piston oil chamber; 303. an electronic cabin; 304. an oil tank; 305. a power and control cabin; 306. an upper oil cavity of the lower shell; 307. a lower oil chamber of the lower shell; 308. a lower piston oil chamber; 309. a lower spring return cabin;
401. a first cable; 402. a second cable;
501. a drilling fluid passage;
601. an oil supply main pipe; 602. a first oil supply branch pipe; 603. a second oil supply branch pipe; 604. a third oil supply branch pipe; 605. and a fourth oil supply branch pipe.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The underground electrohydraulic control active pressurizer comprises an inner mandrel and an outer shell, wherein the inner mandrel is sleeved outside the inner mandrel, the outer shell comprises an upper shell and a lower shell 5 which are arranged up and down, an upper slip mechanism, a lower slip mechanism and an electric hydraulic control mechanism are arranged between the inner mandrel and the outer shell, the upper slip mechanism is connected with the upper shell, the lower slip mechanism is connected with the lower shell 5, the electric hydraulic control mechanism can control the upper slip mechanism and the lower slip mechanism to work, and the electric hydraulic control mechanism can enable the lower shell 5 to be close to or far away from the upper shell, as shown in fig. 1-15.
The mechanical construction of the downhole electro-hydraulic active pressurizer is described below.
The electro-hydraulic control mechanism comprises a motor 14, an oil pump 15 and a hydraulic valve group 16 which are sequentially connected, wherein the motor 14 is a hollow motor, the oil pump 15 is a high-pressure plunger pump, and the hydraulic valve group 16 comprises a plurality of electric control reversing valves. The upper slip mechanism comprises an upper slip 10 and an upper piston 11, the lower slip mechanism comprises a lower slip 19 and a lower piston 18, and the electro-hydraulic control mechanism can control the radial extension or retraction of the upper slip 10 and can also control the radial extension or retraction of the lower slip 19. The lower housing 5 is moved closer to the upper housing, i.e. the lower housing 5 is moved upwards to retract relative to the upper housing until the lower housing 5 is in a retracted state. The lower housing 5 is moved away from the upper housing, i.e. the lower housing 5 is moved downwardly with respect to the upper housing until the lower housing 5 is in the extended state, as shown in fig. 1 to 6.
In this embodiment, the downhole electro-hydraulic active pressurizer further comprises an upper connector 1, a lower connector 6, a male plug 7, a male socket 8, a female plug 21 and a female socket 20, wherein the upper housing comprises an upper housing 2, a middle housing 3 and a transition connector 4 which are sequentially connected from top to bottom. The inner mandrel comprises an upper mandrel 9 and a lower mandrel 13 which are connected up and down.
The upper and lower both ends of upper joint 1 all are equipped with the screw thread, and the upper end of upper joint 1 can pass through threaded connection with other instruments, and threaded connection is passed through with the upper end of upper portion casing 2 to the lower extreme of upper portion casing 2, and threaded connection is passed through with the upper end of intermediate casing 3 to the lower extreme of intermediate casing 3, and threaded connection is passed through with the upper end of transition joint 4 to the lower extreme of intermediate casing 3, and the upper end of lower casing 5 wears to establish in the hole of transition joint 4 and can carry out axial displacement, and threaded connection is passed through with the upper end of lower joint 6 to the lower extreme of lower casing 5, and the lower extreme of lower joint 6 is equipped with the screw thread, and threaded connection can be passed through with other instruments to the lower extreme of lower joint 6.
The male plug 7 is arranged in an inner hole of the male socket 8 in a penetrating mode, the upper portion of the male socket 8 is tightly pressed through an upper gland 25, the male socket 8 is limited to move upwards and axially, the lower end of the male socket 8 is connected with an upper mandrel 9 in a threaded mode, an upper slip 10 is arranged in a groove of the upper shell 2 in a penetrating mode, the inner wall of the upper slip 10 is in contact with the outer wall of the upper mandrel 9, the upper slip 10 can slide axially, the upper end face of the upper piston 11 is in contact with the lower end face of the upper slip 10, the lower end face of the middle step of the upper piston 11 is abutted against a reset spring 24, a control unit 12 is arranged on the upper mandrel 9, the control unit 12 comprises a circuit board and a chip, the control unit 12 is fixed through screws, the lower end of the upper mandrel 9 is connected with the upper end of a lower mandrel 13 in a threaded mode, and the upper portion of the lower mandrel 13 is provided with a motor 14, an oil pump 15 and a hydraulic valve group 16 in a penetrating mode.
The middle piston 17 is connected with the lower shell 5 through threads, the connection mode of the lower piston 18, the lower slip 19 and the return spring 24 is the same as the connection mode of the upper piston 11, the upper slip 10 and the return spring 24, the female socket 20 is arranged in the lower inner hole of the lower mandrel 13 in a penetrating way, the female socket 20 can move axially, the female plug 21 is arranged in the inner hole of the female socket 20 in a penetrating way, the lower part of the female socket 20 is tightly pressed through the lower gland 26, the female socket 20 is limited to move axially downwards, and the sealing plug 22 and the hydraulic oil pipe joint 23 are arranged in the inner holes at a plurality of positions.
In this embodiment, the outer surface of the inner mandrel includes a first boss 201, a second boss 202, a third boss 203, a fourth boss 204, a fifth boss 205 and a sixth boss 206, which are sequentially installed from top to bottom, and seal ring grooves and seal rings are disposed in the outer peripheral surfaces of the first boss 201, the second boss 202, the third boss 203, the fourth boss 204, the fifth boss 205 and the sixth boss 206, as shown in fig. 7.
The inner mandrel is provided with a first upper axial hole 207, a second upper axial hole 208, a first lower axial hole 209, a second lower axial hole 2010, a third lower axial hole 2011, a first axial groove through hole 2012, a second axial groove through hole 2013, a first radial groove through hole 2014, a second radial groove through hole 2015, a third radial groove through hole 2016, a fourth radial groove through hole 2017, a fifth radial groove through hole 2018, a sixth radial groove through hole 2019, a seventh radial groove through hole 2020, an eighth radial groove through hole 2021, and a ninth radial communication hole 2022.
An upper spring reset cabin 301 is formed between the upper end surface of the middle part of the upper piston 11 and the lower end surface of the upper step of the upper shell 2, a closed upper piston oil cavity 302 is formed between the lower end surface of the upper piston 11 and the second boss 202, a closed electronic cabin 303 is formed between the second boss 202 and the third boss 203, a control unit 12 is arranged in the electronic cabin 303, a closed oil tank 304 is formed between the third boss 203 and the fourth boss 204, a closed power and control cabin 305 is formed between the fourth boss 204 and the fifth boss 205, the electro-hydraulic control mechanism is arranged in the power and control cabin 305, and the control unit 12 can control the electro-hydraulic control mechanism. A closed lower housing upper oil chamber 306 is formed between the middle piston 17 and the fifth boss 205, a closed lower housing lower oil chamber 307 is formed between the middle piston 17 and the transition joint 4, a closed lower piston oil chamber 308 is formed between the lower piston 18 and the lower housing 5, and a lower spring return chamber 309 is formed between the lower piston 18 and the lower housing 5, as shown in fig. 8.
The following describes the construction of a cable connection for the electro-hydraulic active downhole pressurizer having two cable passages therein.
The first channel cable passage is related to a structure that a first upper axial pore canal 207 is arranged in the side wall of an upper mandrel 9, and a second radial communication hole 2015 and a third radial communication hole 2016 are arranged on the side wall of the upper mandrel 9; one end of a first cable 401 is located in the male socket 8, the first cable 401 is connected with the male plug 7, the first cable 401 is led out through a threading hole of the male socket 8, the first cable 401 sequentially penetrates through the first upper axial duct 207 and the second radial groove through hole 2015 and then is connected with the control unit 12 in the electronic cabin 303, and a wire led out by the control unit 12 sequentially penetrates through the second radial groove through hole 2015, the first upper axial duct 207 and the third radial groove through hole 2016 and then enters the power and control cabin 305 to be connected with the motor 14 and the hydraulic valve group 16. The first cable 401 forms a control circuit, which is controlled by the control unit 12 to the motor 14 and the hydraulic valve block 16, as shown in fig. 9.
The structure related to the second cable channel is that the lower end of the lower mandrel 13 is connected with a female socket 20, a third lower axial duct 2011 is arranged in the side wall of the lower mandrel 13, and a sixth radial communication hole 2019 is arranged on the side wall of the lower mandrel 13; one end of the second cable 402 is located in the male socket 8, the second cable 402 is connected with the male plug 7, the second cable 402 is led out through the threading hole of the male socket 8, and the second cable 402 sequentially passes through the first upper axial hole 207, the third radial hole 2016, the sixth radial hole 2019 and the third lower axial hole 2011 and then enters the threading hole of the female socket 20 to be connected with the female plug 21. A cabled circuit is formed to power the lower tool. The first cable 401 and the second cable 402 are in parallel relationship as shown in fig. 9.
The following describes the relevant construction of the drilling fluid passage of the downhole electro-hydraulic active pressurizer.
The inner mandrel is of a tubular structure, an axial inner runner is arranged in the inner mandrel, the upper end of the inner mandrel is connected with a male socket 8, the lower end of the inner mandrel is connected with a female socket 20, inclined holes are formed in the side walls of the male socket 8 and the female socket 20, and the inclined holes of the male socket 8, the axial inner runner of the inner mandrel and the inclined holes of the female socket 20 are sequentially communicated to form a drilling fluid channel 501. Drilling fluid enters from the inclined holes on the side wall of the male socket 8, flows into the axial inner flow passages of the upper mandrel and the lower mandrel, and is reserved through the inclined holes on the side wall of the female socket 20, so that independent drilling fluid channels 501 are formed, as shown in fig. 10.
The following describes the construction of the hydraulic oil passage of the downhole electro-hydraulic active pressurizer.
Configuration related to oil supply and return buses:
the fourth boss 204 is provided with two first axial groove through holes 2012, one of the first axial groove through holes 2012 is connected with the oil pump 15 and the hydraulic valve group 16 through the oil supply manifold 601, and the other first axial groove through hole 2012 is connected with the hydraulic valve group 16 through the oil return manifold.
Hydraulic oil can flow out from the oil tank 304 through the first axial groove through hole 2012, flows into the oil pump 15 through the oil supply main pipe 601, and the oil pump 15 supplies the hydraulic oil to the hydraulic valve group 16, namely an oil supply main channel; the other path from the oil tank 304 is connected to the hydraulic valve block 16 through the oil return manifold to form an oil return passage, as shown in fig. 11.
And the oil way structure is related to controlling the upper slip mechanism, the lower slip mechanism and the lower shell to work, and four pieces of oil way structures are used in total:
upper slip telescoping control loop:
the upper slip mechanism is positioned between the first boss 201 and the second boss 202, the upper slip mechanism comprises an upper slip 10 and an upper piston 11, an upper spring reset cabin 301 is formed between the upper piston 11 and the upper shell, a reset spring 24 is arranged in the upper spring reset cabin 301, a closed upper piston oil cavity 302 is formed between the upper piston 11 and the second boss 202, a second upper axial duct 208 is arranged in the side wall of the upper mandrel 9, and a first radial duct through hole 2014 and a fourth radial communication hole 2017 are arranged on the side wall of the upper mandrel 9; one end of the first oil supply branch pipe 602 is connected with the hydraulic valve group 16, and the first oil supply branch pipe 602 sequentially passes through the fourth radial groove through hole 2017, the second upper axial hole 208 and the first radial communication hole 2014 and then is communicated with the upper piston oil chamber 302. The first oil supply branch 602 can inject hydraulic oil into the upper piston oil chamber 302 so that the upper slips 10 are extended, the first oil supply branch 602 is relieved of hydraulic oil, and the return spring 24 can retract the upper slips 10.
Lower slips flexible control circuit:
the lower slip mechanism is located between the fifth boss 205 and the sixth boss 206, and comprises a lower slip 19 and a lower piston 18, a lower spring return cabin 309 is formed between the lower piston 18 and the lower housing 5, a return spring 24 is arranged in the lower spring return cabin 309, a closed lower piston oil cavity 308 is also formed between the lower piston 18 and the lower housing 5, a first lower axial duct 209 is arranged in the side wall of the lower mandrel 13, and a fifth radial communication hole 2018 and a ninth radial communication hole 2022 are arranged on the side wall of the lower mandrel 13; one end of the second oil supply branch pipe 603 is connected to the hydraulic valve group 16, and the second oil supply branch pipe 603 sequentially passes through the fifth radial communication hole 2018, the first lower axial hole 209 and the ninth radial groove through hole 2022 and then communicates with the lower piston oil chamber 308. The second oil supply branch 603 can inject hydraulic oil into the lower piston oil chamber 308, so that the lower slips 19 are extended, the second oil supply branch 603 unloads hydraulic oil, and the return spring 24 can retract the lower slips 19.
Lower housing extension control loop:
the upper end of the lower shell 5 is positioned in the upper shell, the upper end of the lower shell 5 is sleeved between the upper shell and the lower mandrel 13, the upper end of the lower shell 5 is connected with a middle piston 17, a closed lower shell upper oil cavity 306 is formed between the middle piston 17 and a fifth boss 205, and a second axial groove through hole 2013 is formed in the fifth boss 205; one end of third oil supply branch pipe 604 is connected to hydraulic valve group 16, and third oil supply branch pipe 604 is connected to lower housing upper oil chamber 306 after passing through second axial groove through hole 2013. Third oil supply branch pipe 604 is capable of injecting hydraulic oil into lower-housing upper oil chamber 306, thereby moving lower housing 5 downward and extending.
Lower housing retract control circuit:
the lower end of the upper shell is connected with a transition joint 4, a closed lower shell lower oil cavity 307 is formed between the middle piston 17 and the transition joint 4, a second lower axial pore path 2010 is arranged in the side wall of the lower mandrel 13, a seventh radial communication hole 2020 and an eighth radial groove through hole 2021 are arranged on the side wall of the lower mandrel 13, a tenth radial groove through hole is arranged at the upper end of the lower shell 5, and the tenth radial groove through hole is communicated with the lower shell lower oil cavity 307; one end of the fourth oil supply branch pipe 605 is connected to the hydraulic valve group 16, and the fourth oil supply branch pipe 605 sequentially passes through the seventh radial groove through hole 2020, the second lower axial port 2010, and the eighth radial groove through hole 2021 and then communicates with the lower housing lower oil chamber 307. Wherein, an annular gap is formed between the upper end of the lower housing 5 and the lower core shaft 13, and the eighth radial groove through hole 2021, the annular gap, the tenth radial groove through hole and the lower housing lower oil chamber 307 are sequentially communicated. The fourth oil supply branch pipe 605 can inject hydraulic oil into the lower housing lower oil chamber 307, thereby moving and retracting the lower housing 5 upward, as shown in fig. 11.
The working principle of the underground electrohydraulic control active pressurizer is described as follows:
when the cabled coiled tubing normally performs drilling operation, the working principle of the underground electro-hydraulic control active pressurizer is as follows: when the cabled coiled tubing normally performs drilling operation, the downhole electro-hydraulic control active pressurizer is in a standby state, drilling fluid flows in through the upper joint 1, and finally the drilling fluid flows out of the lower joint 6 and enters the lower tool through the drilling fluid channel 501. The current flows in through the male plug 7 of the underground electrohydraulic control active pressurizer, and passes through the cable channel, one path stands by through the control unit 12, and when drilling operation is normally performed, the control unit 12 is in a silent state, performs self-checking in a intermittent manner, and sends data upwards to report the state of the ground electrohydraulic control system. The other path exits the female plug 21 through the cable circuit and enters the lower tool. The electro-hydraulic control mechanism is not in operation and the upper slips 10, lower slips 19 and lower housing 5 are in a retracted state.
When the cabled coiled tubing is under pressure or is not under drilling pressure, ground personnel send a releasing instruction through a computer, after receiving the instruction, the control unit 12 can start the motor 14, and the motor 14 drives the oil pump 15 and the hydraulic valve group 16 to work, and the concrete steps are as follows:
step 1, an upper slip 10 extends out of a supporting well wall;
the hydraulic valve group 16 controls hydraulic oil to enter the upper piston oil cavity 302 through the first oil supply branch pipe 602 to push the upper piston 11 to move upwards, the return spring 24 is compressed, and the upper slips 10 extend out, as shown in fig. 13; at this time, both the lower slips 19 and the lower casing 5 are in the retracted state.
Step 2, the lower shell 5 extends out;
the hydraulic valve group 16 controls hydraulic oil to enter the upper oil cavity 306 of the lower shell through the third oil supply branch pipe 604, the middle piston 17 is pushed to move downwards, the middle piston 17 and the lower shell 5, the lower joint 6, the female socket 20, the female plug 21 and other fixed connection units integrally move downwards, as shown in fig. 15, the lower shell 5 and the transition joint 4 slide in an axial sealing manner, the female socket 20 and the lower mandrel 13 slide in an axial sealing manner, and the tool string connected to the lower part of the lower joint 6 also integrally moves downwards, so that the purpose of active pressurization is achieved, and at the moment, the lower slips 19 are in a retracted state.
Step 3, the lower slips 19 extend out of the supporting well wall;
the hydraulic valve group 16 controls the hydraulic oil to enter the lower piston oil cavity 308 through the second oil supply branch pipe 603, pushes the lower piston 18 to move downwards, compresses the return spring 24, and stretches the lower slips 19, and at this time, the upper slips 10, the lower slips 19 and the lower casing 5 are all in a stretched state.
Step 4, the upper slips 10 are retracted;
the hydraulic valve set 16 unloads the hydraulic oil that enters the upper piston oil chamber 302 by controlling the first oil supply branch pipe 602, the compressed return spring 24 pushes the upper piston 11 to move downward, the hydraulic oil of the upper piston oil chamber 302 flows into the oil tank 304 through the oil return passage of the hydraulic valve set 16, and the upper slips 10 are retracted, as shown in fig. 12.
Step 5, the lower housing 5 is retracted;
the hydraulic valve group 16 controls hydraulic oil to enter the lower oil cavity 307 of the lower shell through the fourth oil supply branch pipe 605 to push the transition joint 4 to move downwards, as shown in fig. 14, the transition joint 4 is fixedly connected with the upper shell 2, the lower joint 6, the male socket 8, the male plug 7, the upper mandrel 9, the lower mandrel 13 and the like, the upper shell moves downwards integrally, the lower shell 5 and the transition joint 4 slide in an axial sealing manner, and the female socket 20 and the lower mandrel 13 slide in an axial sealing manner.
And 6, sequentially repeating the steps 1 to 5, wherein the repetition times can be determined according to the needs, so that the automatic drill feeding and the automatic pressurization are realized.
For ease of understanding and description, the present invention is described using absolute positional relationships, where the azimuth term "upper" indicates the upper direction in fig. 1 and the azimuth term "lower" indicates the lower direction in fig. 1 unless otherwise specified. The present invention is described using the viewing angle of the reader or user, but the above directional terms are not to be interpreted or construed as limiting the scope of the present invention.
The foregoing description of the embodiments of the invention is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention shall fall within the scope of the patent. In addition, the technical characteristics and technical characteristics, the technical characteristics and technical scheme and the technical scheme can be freely combined for use.
Claims (2)
1. The underground electrohydraulic control active pressurizer is characterized by comprising an inner mandrel and an outer shell, wherein the inner mandrel is sleeved outside the outer shell, the outer shell comprises an upper shell and a lower shell (5) which are arranged up and down, an upper slip mechanism, a lower slip mechanism and an electrohydraulic control mechanism are arranged between the inner mandrel and the outer shell, the upper slip mechanism is connected with the upper shell, the lower slip mechanism is connected with the lower shell (5), the electrohydraulic control mechanism can control the upper slip mechanism and the lower slip mechanism to work, and the electrohydraulic control mechanism can also enable the lower shell (5) to approach or depart from the upper shell;
the outer surface of the inner mandrel comprises a first boss (201), a second boss (202), a third boss (203), a fourth boss (204), a fifth boss (205) and a sixth boss (206) which are sequentially arranged from top to bottom, a closed electronic cabin (303) is formed between the second boss (202) and the third boss (203), a control unit (12) is arranged in the electronic cabin (303), a closed oil tank (304) is formed between the third boss (203) and the fourth boss (204), a closed power and control cabin (305) is formed between the fourth boss (204) and the fifth boss (205), an electro-hydraulic control mechanism is arranged in the power and control cabin (305), the control unit (12) can control the electro-hydraulic control mechanism, and the electro-hydraulic control mechanism comprises a motor (14), an oil pump (15) and a hydraulic valve group (16) which are sequentially connected;
the inner mandrel comprises an upper mandrel (9) and a lower mandrel (13) which are connected up and down, the upper end of the upper mandrel (9) is connected with a male socket (8), a first upper axial duct (207) is arranged in the side wall of the upper mandrel (9), and a second radial groove through hole (2015) and a third radial groove through hole (2016) are arranged on the side wall of the upper mandrel (9);
one end of a first cable (401) is positioned in the male socket (8), the first cable (401) sequentially passes through the first upper axial duct (207) and the second radial duct through hole (2015) and then is connected with the control unit (12), and a wire led out by the control unit (12) sequentially passes through the second radial duct through hole (2015), the first upper axial duct (207) and the third radial duct through hole (2016) and then is connected with the motor (14) and the hydraulic valve group (16);
the lower end of the lower mandrel (13) is connected with a female socket (20), a third lower axial duct (2011) is arranged in the side wall of the lower mandrel (13), and a sixth radial duct through hole (2019) is arranged on the side wall of the lower mandrel (13);
one end of a second cable (402) is positioned in the male socket (8), and the second cable (402) sequentially passes through the first upper axial duct (207), the third radial groove through hole (2016), the sixth radial groove through hole (2019) and the third lower axial duct (2011) and then enters the female socket (20);
an axial inner flow passage is formed in the inner mandrel, the upper end of the inner mandrel is connected with a male socket (8), the lower end of the inner mandrel is connected with a female socket (20), inclined holes are formed in the side walls of the male socket (8) and the female socket (20), and the inclined holes of the male socket (8), the axial inner flow passage of the inner mandrel and the inclined holes of the female socket (20) are sequentially communicated to form a drilling fluid passage (501);
the inner mandrel comprises an upper mandrel (9) and a lower mandrel (13) which are connected up and down, the upper slip mechanism is positioned between a first boss (201) and a second boss (202), the upper slip mechanism comprises an upper slip (10) and an upper piston (11), an upper spring reset cabin (301) is formed between the upper piston (11) and the upper shell, a reset spring (24) is arranged in the upper spring reset cabin (301), a closed upper piston oil cavity (302) is formed between the upper piston (11) and the second boss (202), a second upper axial duct (208) is arranged in the side wall of the upper mandrel (9), and a first radial groove through hole (2014) and a fourth radial groove through hole (2017) are formed in the side wall of the upper mandrel (9);
one end of a first oil supply branch pipe (602) is connected with the hydraulic valve group (16), and the first oil supply branch pipe (602) sequentially passes through a fourth radial groove through hole (2017), a second upper axial pore canal (208) and a first radial groove through hole (2014) and then is communicated with the upper piston oil cavity (302);
the lower slip mechanism is positioned between a fifth boss (205) and a sixth boss (206), the lower slip mechanism comprises a lower slip (19) and a lower piston (18), a lower spring reset cabin (309) is formed between the lower piston (18) and a lower shell (5), a reset spring (24) is arranged in the lower spring reset cabin (309), a closed lower piston oil cavity (308) is also formed between the lower piston (18) and the lower shell (5), a first lower axial duct (209) is arranged in the side wall of the lower mandrel (13), and a fifth radial groove through hole (2018) and a ninth radial groove through hole (2022) are arranged on the side wall of the lower mandrel (13);
one end of a second oil supply branch pipe (603) is connected with the hydraulic valve group (16), and the second oil supply branch pipe (603) sequentially passes through a fifth radial groove through hole (2018), a first lower axial pore passage (209) and a ninth radial groove through hole (2022) and then is communicated with a lower piston oil cavity (308);
the upper end of the lower shell (5) is positioned in the upper shell, the upper end of the lower shell (5) is sleeved between the upper shell and the lower mandrel (13), the upper end of the lower shell (5) is connected with a middle piston (17), a closed lower shell upper oil cavity (306) is formed between the middle piston (17) and a fifth boss (205), and a second axial groove through hole (2013) is formed in the fifth boss (205);
one end of a third oil supply branch pipe (604) is connected with the hydraulic valve group (16), and the third oil supply branch pipe (604) passes through the second axial groove through hole (2013) and then is communicated with the upper oil cavity (306) of the lower shell;
the lower end of the upper shell is connected with a transition joint (4), a closed lower shell lower oil cavity (307) is formed between a middle piston (17) and the transition joint (4), a second lower axial pore canal (2010) is arranged in the side wall of a lower mandrel (13), a seventh radial groove through hole (2020) and an eighth radial groove through hole (2021) are arranged on the side wall of the lower mandrel (13), a tenth radial groove through hole is formed in the upper end of the lower shell (5), and the tenth radial groove through hole is communicated with the lower shell lower oil cavity (307);
one end of a fourth oil supply branch pipe (605) is connected with the hydraulic valve group (16), and the fourth oil supply branch pipe (605) sequentially passes through the seventh radial groove through hole (2020), the second lower axial pore canal (2010) and the eighth radial groove through hole (2021) and then is communicated with the lower oil cavity (307) of the lower shell.
2. The downhole electro-hydraulic active pressurizer according to claim 1, wherein two first axial groove through holes (2012) are arranged in the fourth boss (204), one first axial groove through hole (2012) is connected with the oil pump (15) and the hydraulic valve block (16) through the oil supply manifold (601), and the other first axial groove through hole (2012) is connected with the hydraulic valve block (16) through the oil return manifold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111580579.XA CN114482888B (en) | 2021-12-22 | 2021-12-22 | Underground electrohydraulic control active pressurizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111580579.XA CN114482888B (en) | 2021-12-22 | 2021-12-22 | Underground electrohydraulic control active pressurizer |
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| CN114482888B true CN114482888B (en) | 2024-02-27 |
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Effective date of registration: 20230103 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. Applicant after: BEIJING PETROLEUM MACHINERY Co.,Ltd. Address before: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant before: CHINA NATIONAL PETROLEUM Corp. Applicant before: CNPC ENGINEERING TECHNOLOGY R & D Co.,Ltd. |
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