CN108999587B - Recoverable automatically controlled hydraulic pressure leather cup instrument of pump sending - Google Patents
Recoverable automatically controlled hydraulic pressure leather cup instrument of pump sending Download PDFInfo
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- CN108999587B CN108999587B CN201710418228.6A CN201710418228A CN108999587B CN 108999587 B CN108999587 B CN 108999587B CN 201710418228 A CN201710418228 A CN 201710418228A CN 108999587 B CN108999587 B CN 108999587B
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- 239000010985 leather Substances 0.000 title claims abstract description 75
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 239000003079 shale oil Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 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
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
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Abstract
The invention provides a recyclable electric control hydraulic leather cup pumping tool, and belongs to the technical field of well completion and production of oil and gas wells. The pumping recyclable electric control hydraulic leather cup tool comprises a power mechanism, a transmission mechanism, a leather cup and a leather cup sleeve; the power mechanism is connected with the transmission mechanism, and the transmission mechanism drives the leather cup to extend out of the leather cup sleeve and retract into the leather cup sleeve. The invention adopts the combination of the screw nut mechanism and the hydraulic piston mechanism, realizes the expansion and retraction of the leather cup by utilizing the underground pressure, can recover the leather cup to expand and cling to the casing when going down the well, is convenient for pumping and quickly putting down the segmented well completion tool, and avoids the leakage of excessive well completion fluid. After the well completion pipe string is in place or is blocked, the leather cup is controlled to retract by transmitting a power signal through the cable on the ground, so that the cable is conveniently lifted up to lift the well completion tool.
Description
Technical Field
The invention belongs to the technical field of well completion and production of oil and gas wells, and particularly relates to a pumping recyclable electric control hydraulic leather cup tool which is used for horizontal well cable conveying or pumping segmented well completion, segmented fracturing and water control well completion.
Background
Along with the exploration and development of unconventional oil and gas resources such as shale gas, shale oil and the like, the staged fracturing modification technology of the horizontal well is effectively implemented. The reservoir fracturing modification technology divides horizontal wells such as shale oil gas and tight rock stratum into multiple sections, then fractures the stratum into multiple cracks, enlarges oil drainage area of an oil gas production layer, and improves oil gas recovery ratio, thereby improving single well yield.
The horizontal well staged fracturing well completion technology mainly comprises horizontal well open hole staged well completion and horizontal well casing staged well completion, wherein the horizontal well casing staged fracturing well completion has the advantages of controllable fracture initiation point, large modification scale and the like, is a main well completion technology for shale oil and gas, compact sandstone oil and gas and coal bed methane reservoir fracturing modification well completion, and is widely popularized and applied to unconventional oil and gas fields at home and abroad.
At present, the horizontal well casing segmented well completion is mainly carried out by pumping a well completion pipe string for multiple times to a horizontal section, the horizontal section is divided into 10-40 sections, fracturing reformation of each section is carried out section by section from bottom to top, and in the whole fracturing reformation well completion process, the well completion pipe string needs to be sent in and taken out for multiple times in a casing of thousands of meters. Because the well completion pipe strings are conveyed by cables, in the process of feeding the well completion pipe strings, in order to overcome the friction resistance of the underground casing and the underground pressure, a fracturing truck group is required to pump the well completion pipe strings by a large discharge amount of completion fluid, and because a certain gap exists between the well completion pipe strings and the casing, the completion fluid can enter the pressed stratum from the gap, on one hand, a large amount of completion fluid is wasted, and on the other hand, the excessive completion fluid entering the stratum can cause damage to the stratum and influence the productivity. In order to prevent the completion fluid from entering the stratum, a leather cup is added on the tool of the completion string and is tightly attached to the casing, and the leather cup structure is added on the completion string, so that the completion fluid is prevented from flowing around from the clearance between the casing and the completion string to enter the lower stratum.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a recyclable electric control hydraulic rubber cup pumping tool, which is used for opening and tightly attaching a casing when a well is put down, so that a segmented well completion tool can be conveniently pumped and quickly put down, the rubber cup is controlled to retract on the ground after the well is put in place, a cable can be conveniently lifted up to lift the well completion tool, the construction efficiency is ensured, the well completion time efficiency is improved, the using amount of a well completion fluid is reduced, the filtration loss of the well completion fluid to a stratum is reduced, and an oil-gas layer is effectively protected.
The invention is realized by the following technical scheme:
a pumping recyclable electric control hydraulic leather cup tool comprises a power mechanism, a transmission mechanism, a leather cup and a leather cup sleeve;
the power mechanism is connected with the transmission mechanism, and the transmission mechanism drives the leather cup to extend out of the leather cup sleeve and retract into the leather cup sleeve.
The transmission mechanism comprises a transmission shaft, a central pipe and a piston;
one end of the transmission shaft is connected with the power mechanism, and the other end of the transmission shaft penetrates through the central tube and then is connected with the lower joint;
the central tube is of a stepped shaft structure with a central through hole and comprises a large-diameter section, a middle-diameter section and a small-diameter section which are connected into a whole and the diameters of which are sequentially reduced;
a piston cavity is formed between the inner wall of the large-diameter section and the outer wall of the transmission shaft, the piston is installed in the piston cavity, a central through hole is formed in the piston, and the transmission shaft penetrates through the central through hole;
one end of the piston is connected with a piston nut; the outer wall of the transmission shaft is provided with threads, the inner wall of the piston nut is provided with threads, and the transmission shaft and the piston nut form a screw nut structure;
an inner hole step is arranged in the through hole of the leather cup sleeve and is in contact with the outer surface of the middle diameter section of the central tube, and one end of the inner wall of the through hole of the leather cup sleeve is in sliding connection with the outer wall of the large diameter section of the central tube; a recovery cavity is formed between the other end of the inner wall of the through hole of the leather cup sleeve and the outer wall of the central tube, and the leather cup can retract into the recovery cavity;
one end of the leather cup is fixedly arranged outside the small-diameter section through a leather cup hoop, and the upper end face of the leather cup props against the step at the transition position of the middle-diameter section and the small-diameter section.
A first hydraulic cavity is formed between the inner wall of the middle-diameter section of the central pipe and the outer wall of the transmission shaft, and a limiting groove parallel to the axis of the middle-diameter section is formed in the inner wall of the middle-diameter section;
the outer wall of the piston nut is provided with a lug which can move in the limiting groove along the direction parallel to the axis.
The upper end surface of the inner hole step of the packing cup sleeve, the step at the transition of the middle diameter section and the small diameter section of the central tube, the inner wall above the inner hole step of the packing cup sleeve and the outer wall of the middle diameter section of the central tube are enclosed to form a second hydraulic cavity;
a pressure transfer hole is formed in the middle-diameter section and communicates the second hydraulic cavity with the first hydraulic cavity; the hydraulic oil can flow in the piston cavity, the first hydraulic cavity and the second hydraulic cavity.
The transmission mechanism comprises a connector; the end part of the small-diameter section of the central pipe is connected with the connector through an external thread;
the connecting head is positioned below the leather cup.
A sealing ring is arranged at the contact position of the inner wall of the central tube and the outer wall of the transmission shaft;
a sealing ring is arranged at the contact position of the inner hole step of the leather cup sleeve and the middle diameter section of the central tube;
and a sealing ring is arranged at the contact position of the transmission shaft and the lower joint.
The shore hardness of the leather cup is 45 HA-110 HA, and the wall thickness is 3 mm-15 mm.
The power mechanism comprises a motor and a speed reducer, the motor is connected with the speed reducer, an output shaft of the speed reducer is connected with one end of a sliding ring central shaft through a coupler, and the other end of the sliding ring central shaft penetrates through a central hole of the through-hole type sliding ring and then is connected with one end of a transmission shaft.
The central shaft of the slip ring is connected with the transmission shaft through a flat key, and then the flat key is fixed through a screw.
The power mechanism comprises a motor fixing sleeve and a motor sealing outer sleeve, an inner cavity of the motor fixing sleeve comprises a large-aperture section and a small-aperture section, the motor is installed in the small-aperture section of the motor fixing sleeve, and the coupler and the through-hole type slip ring are installed in the large-aperture section;
the tail end of the large-aperture section is connected with one end of a bearing pressing sleeve, the other end of the bearing pressing sleeve is connected with one end of a connector through external threads, and the other end of the connector is connected with a central pipe through internal threads;
the motor fixing sleeve is positioned in the inner cavity of the motor sealing outer sleeve;
one end of the motor sealing outer sleeve is connected with the connector through an internal thread, and a sealing ring is installed at the contact position of the motor sealing outer sleeve and the connector.
A sleeve is arranged between the bearing pressing sleeve and the transmission shaft, and a rolling bearing is arranged in an inner cavity of the connector;
the upper end face of the rolling bearing props against a step in an inner hole of the connector, and the lower end face of the rolling bearing props against the upper end face of the bearing pressing sleeve;
the upper end face of the sleeve props against the rolling bearing, the lower end face of the sleeve props against the nut, and the nut is fixedly connected to the transmission shaft.
The motor adopts a brushless direct current motor of 48V/700W.
Compared with the prior art, the invention has the beneficial effects that:
1) the power is transmitted by utilizing the transmission cable of the original well completion pipe string;
2) the pumping speed is increased when the leather cup tool is opened for pumping, and the well completion timeliness is improved;
3) the dosage of the completion fluid in the pumping process is reduced, the amount of the completion fluid which is leaked to the stratum is reduced, and the oil-gas layer is effectively protected;
4) when the well completion pipe string is blocked or jammed, the leather cup is retracted when the well completion pipe string is pulled out, the well completion pipe string is pulled out conveniently, and underground accidents are avoided;
5) the completion cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a recyclable electric control hydraulic cup pumping tool of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
aiming at the problem of low natural productivity of a horizontal well with a low-permeability oil reservoir, a multi-stage staged fracturing transformation measure is generally developed abroad, particularly, with the development of shale gas, a multi-stage large-scale staged fracturing process is rapidly developed, the highest fracturing stage number reaches 40 at present, and the method becomes a main key technology for shale gas development. At present, a completion pipe string is conveyed and pumped by using an in-casing cable to achieve the purpose of segmented completion reconstruction, the prior completion pipe string wastes pumped completion fluid or enters stratum to cause stratum damage in the pumping process, and the completion pipe string is pumped or generates obstruction blocking to cause underground accidents.
Aiming at staged fracturing and staged water control of a horizontal well, a well completion process adopting cables and pumping delivery such as pumping bridge plug staged well completion is developed for rapidly pumping and running in, ensuring construction efficiency, improving well completion timeliness, reducing the using amount of well completion fluid, reducing the leakage amount of the well completion fluid to a stratum, effectively protecting an oil-gas layer and using a recyclable leather cup tool for pumping.
The characteristic that the horizontal well pumping segmented completion pipe string is conveyed by a cable is utilized, and an electric control leather cup tool capable of expanding and contracting is added on the basis of the original composition of the completion pipe string, and the leather cup can be expanded in the process of feeding the completion pipe string and can be retracted when being blocked or lifted when meeting a blockage, so that the use of excessive completion fluid or underground accidents caused by the excessive completion fluid is avoided.
The forward rotation or the reverse rotation of a motor in the packing cup tool is controlled by electric power through a cable for conveying a well completion pipe string, so that the packing cup is driven to open or retract.
As shown in fig. 1, the structure of the cup tool is as follows:
recoverable leather cup instrument of electric control hydraulic drive comprises motor 2, reduction gear (do not mark in the picture), lead screw nut mechanism, hydraulic piston, cylinder liner, leather cup 17, leather cup sleeve 20 etc. specifically includes: the motor sealing device comprises a motor sealing outer sleeve 1, a motor 2, a motor fixing sleeve 3, a screw 4, a coupler 5, a through hole type sliding ring 6, a sliding ring central shaft 7, a screw 8, a nut 9, a sleeve 10, a bearing pressing sleeve 11, a rolling bearing 12, an O-shaped sealing ring 13, a connector 14, an O-shaped sealing ring 15, a transmission shaft 16, a leather cup 17, a leather cup hoop 18, a central pipe 19, a leather cup sleeve 20, an O-shaped sealing ring 21, a piston 22, an O-shaped sealing ring 23, a lower connector 24, a cap type sliding ring 25 and a right plug 26.
The tool is conveyed through a cable, the recoverable leather cup tool controlled by electricity is stretched and tightly attached to the sleeve when the tool is put down in a well, the segmented well completion tool is convenient to pump and quickly put down, after the segmented well completion tool is in place and the functions of segmenting, setting or opening and closing a sliding sleeve and the like are completed, the ground controls the leather cup to retract into the leather cup sleeve through the power transmission of the cable for the conveying tool, and the cable is conveniently lifted to lift the leather cup and other well completion tools.
A power mechanism: the motor 2, the coupler 5, the slip ring 6, the transmission shaft 16 (namely a lead screw), the nut 9 (the nut is used for pressing the bearing pressing sleeve 10 to prevent the bearing from moving up and down, thereby ensuring that the transmission shaft 16 cannot move axially), the piston 22 and the central tube 19 are formed, the transmission shaft 16 is driven to rotate by the positive rotation and the reverse rotation of the motor 2, the transmission shaft 16 is connected with the nut of the piston 22 (the inner surface of the lower part of the piston 22 is provided with an internal thread to form a nut and is meshed with an external thread outside the transmission shaft) to form a lead screw nut mechanism, the inner wall of the central tube 19 is provided with a limiting groove parallel to the axis of the central tube, the outer wall of the piston nut is provided with a lug, the limiting groove is used for being matched with the lug on the outer surface of the piston to prevent the piston nut. Through the structural design, the forward and reverse rotation motion generated by the motor driving the screw rod is converted into up-and-down axial motion in the limiting groove through the piston. The slip ring central shaft 7 and the transmission shaft 16 are connected through a flat key, and then the flat key is fixed through a screw; the function of the coupling head 14 is to seal the motor while providing an up-and-down connection.
The leather cup retraction action principle is as follows: after the motor 2 is powered on, the transmission shaft 16 is driven, the transmission shaft 16 and the piston nut form a screw nut mechanism, due to the existence of the limiting groove, the piston 22 can only move axially and downwards through the screw nut mechanism, the piston compresses hydraulic oil in a hydraulic cylinder formed by the central pipe 19 and the transmission shaft 16 to generate hydraulic pressure, the hydraulic pressure extrudes the hydraulic oil into a liquid cavity formed by the central pipe 19 and the cup sleeve 20 through the opening of the central pipe 19 (the lower connector 24 is directly connected with the central pipe 19 through threads, the cup sleeve 20 is in sliding connection with the central pipe 19 and can slide up and down), and meanwhile, the cup sleeve 20 is pushed to move downwards to press the cup 17 into the cup sleeve 20, so that the cup retraction is realized.
The opening action principle of the leather cup is as follows: the motor 2 rotates reversely, the transmission shaft 16 is driven to rotate, the screw nut rotates, the piston 22 moves upwards, the pressure in the piston cavity is reduced (at the moment, hydraulic oil returns to a hydraulic cylinder formed by the central pipe and the transmission shaft from a hydraulic cavity formed by the central pipe and the cup leather sleeve), the bottom hole pressure directly acts on the cup leather sleeve, and the cup leather sleeve can be pushed to move upwards to release the cup leather and open the cup leather because the pressure in the hydraulic cavity is reduced. The cup hoop 18 is used for fixing the cup to prevent the cup from slipping
The leather cup is made of nitrile rubber or other materials, the Shore hardness of the leather cup is controlled to be 45 HA-110 HA, and the wall thickness is controlled to be 3 mm-15 mm.
The invention adopts the rolling bearing, thereby effectively reducing the friction resistance when the lead screw rotates.
The motor selects a 48V/700W brushless direct current motor, the drive chip selects MC33035, and the control chip adopts a 32-bit ARM single chip microcomputer.
In the well completion process of the unconventional oil and gas reservoir by adopting a horizontal well casing internal test cable for conveying and adopting a pumping well completion pipe string for realizing segmented reconstruction, the pumping well completion fluid is wasted or enters a stratum to cause stratum damage due to overlarge gap between the well completion pipe string and the casing; if the clearance between the well completion string and the casing is too small or even interference, the well completion string and the casing may be stuck when being pumped or encountered, thereby causing downhole accidents. The invention adopts the combination of the screw nut mechanism and the hydraulic piston mechanism, realizes the expansion and retraction of the leather cup by utilizing the underground pressure, can recover the leather cup to expand and cling to the casing when going down the well, is convenient for pumping and quickly putting down the segmented well completion tool, and avoids the leakage of excessive well completion fluid. After the well completion pipe string is in place or is blocked, the leather cup is controlled to retract by transmitting a power signal through the cable on the ground, so that the cable is conveniently lifted up to lift the well completion tool.
The above-described embodiment is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application and principle of the present invention disclosed in the present application, and the present invention is not limited to the method described in the above-described embodiment of the present invention, so that the above-described embodiment is only preferred, and not restrictive.
Claims (9)
1. The utility model provides a recoverable automatically controlled hydraulic pressure leather cup instrument of pump sending which characterized in that: the pumping recoverable electric control hydraulic leather cup tool comprises a power mechanism, a transmission mechanism, a leather cup and a leather cup sleeve;
the power mechanism is connected with the transmission mechanism, and the transmission mechanism drives the leather cup to extend out of the leather cup sleeve and retract into the leather cup sleeve;
the transmission mechanism comprises a transmission shaft, a central pipe and a piston;
one end of the transmission shaft is connected with the power mechanism, and the other end of the transmission shaft penetrates through the central tube and then is connected with the lower joint;
the central tube is of a stepped shaft structure with a central through hole and comprises a large-diameter section, a middle-diameter section and a small-diameter section which are connected into a whole and the diameters of which are sequentially reduced;
a piston cavity is formed between the inner wall of the large-diameter section and the outer wall of the transmission shaft, the piston is installed in the piston cavity, a central through hole is formed in the piston, and the transmission shaft penetrates through the central through hole;
one end of the piston is connected with a piston nut; the outer wall of the transmission shaft is provided with threads, the inner wall of the piston nut is provided with threads, and the transmission shaft and the piston nut form a screw nut structure;
an inner hole step is arranged in the through hole of the leather cup sleeve and is in contact with the outer surface of the middle diameter section of the central tube, and one end of the inner wall of the through hole of the leather cup sleeve is in sliding connection with the outer wall of the large diameter section of the central tube; a recovery cavity is formed between the other end of the inner wall of the through hole of the leather cup sleeve and the outer wall of the central tube, and the leather cup can retract into the recovery cavity;
one end of the leather cup is fixedly arranged outside the small-diameter section through a leather cup hoop, and the upper end face of the leather cup props against the step at the transition position of the middle-diameter section and the small-diameter section.
2. The electrically controlled retrievable hydraulic cup tool of claim 1, wherein: a first hydraulic cavity is formed between the inner wall of the middle-diameter section of the central pipe and the outer wall of the transmission shaft, and a limiting groove parallel to the axis of the middle-diameter section is formed in the inner wall of the middle-diameter section;
the outer wall of the piston nut is provided with a lug which can move in the limiting groove along the direction parallel to the axis.
3. The electrically controlled retrievable hydraulic cup tool of claim 2, wherein: the upper end surface of the inner hole step of the packing cup sleeve, the step at the transition of the middle diameter section and the small diameter section of the central tube, the inner wall above the inner hole step of the packing cup sleeve and the outer wall of the middle diameter section of the central tube are enclosed to form a second hydraulic cavity;
a pressure transfer hole is formed in the middle-diameter section and communicates the second hydraulic cavity with the first hydraulic cavity; the hydraulic oil can flow in the piston cavity, the first hydraulic cavity and the second hydraulic cavity.
4. The electrically controlled retrievable hydraulic cup tool of claim 3, wherein: the transmission mechanism comprises a connector; the end part of the small-diameter section of the central pipe is connected with the connector through an external thread;
the connecting head is positioned below the leather cup.
5. The electrically controlled retrievable hydraulic cup tool of claim 4, wherein: a sealing ring is arranged at the contact position of the inner wall of the central tube and the outer wall of the transmission shaft;
a sealing ring is arranged at the contact position of the inner hole step of the leather cup sleeve and the middle diameter section of the central tube;
and a sealing ring is arranged at the contact position of the transmission shaft and the lower joint.
6. The electrically controlled retrievable hydraulic cup tool according to any one of claims 1 to 5, wherein: the shore hardness of the leather cup is 45 HA-110 HA, and the wall thickness is 3 mm-15 mm.
7. The electrically controlled retrievable hydraulic cup tool of claim 5, wherein: the power mechanism comprises a motor and a speed reducer, the motor is connected with the speed reducer, an output shaft of the speed reducer is connected with one end of a sliding ring central shaft through a coupler, and the other end of the sliding ring central shaft penetrates through a central hole of the through-hole type sliding ring and then is connected with one end of a transmission shaft;
the central shaft of the slip ring is connected with the transmission shaft through a flat key, and then the flat key is fixed through a screw.
8. The electrically controlled retrievable hydraulic cup tool of claim 7, wherein: the power mechanism comprises a motor fixing sleeve and a motor sealing outer sleeve, an inner cavity of the motor fixing sleeve comprises a large-aperture section and a small-aperture section, the motor is installed in the small-aperture section of the motor fixing sleeve, and the coupler and the through-hole type slip ring are installed in the large-aperture section;
the tail end of the large-aperture section is connected with one end of a bearing pressing sleeve, the other end of the bearing pressing sleeve is connected with one end of a connector through external threads, and the other end of the connector is connected with a central pipe through internal threads;
the motor fixing sleeve is positioned in the inner cavity of the motor sealing outer sleeve;
one end of the motor sealing outer sleeve is connected with the connector through an internal thread, and a sealing ring is arranged at the contact position of the motor sealing outer sleeve and the connector;
a sleeve is arranged between the bearing pressing sleeve and the transmission shaft, and a rolling bearing is arranged in an inner cavity of the connector;
the upper end face of the rolling bearing props against a step in an inner hole of the connector, and the lower end face of the rolling bearing props against the upper end face of the bearing pressing sleeve;
the upper end face of the sleeve props against the rolling bearing, the lower end face of the sleeve props against the nut, and the nut is fixedly connected to the transmission shaft.
9. The electrically controlled retrievable hydraulic cup tool of claim 8, wherein: the motor adopts a brushless direct current motor of 48V/700W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710418228.6A CN108999587B (en) | 2017-06-06 | 2017-06-06 | Recoverable automatically controlled hydraulic pressure leather cup instrument of pump sending |
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|---|---|---|---|
| CN201710418228.6A CN108999587B (en) | 2017-06-06 | 2017-06-06 | Recoverable automatically controlled hydraulic pressure leather cup instrument of pump sending |
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| CN108999587B true CN108999587B (en) | 2020-09-11 |
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| CN101403284A (en) * | 2008-10-23 | 2009-04-08 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Down-hole tool and controllable segment sealing device for down-hole working barrel seal |
| CN201330578Y (en) * | 2009-01-09 | 2009-10-21 | 西部钻探克拉玛依钻井工艺研究院 | A recycling drilling-free cementing tool |
| CN103201454A (en) * | 2010-09-03 | 2013-07-10 | Ncs油田服务股份有限公司加拿大分公司 | Multi-function isolation tool and method of use |
| CN104453859A (en) * | 2013-09-24 | 2015-03-25 | 中国石油化工股份有限公司 | Well completing tester and system thereof |
| WO2016053488A1 (en) * | 2014-10-01 | 2016-04-07 | Exxonmobil Upstream Research Company | Internal subsurface safety valve for rotating downhole pumps |
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| CN106593347A (en) * | 2016-12-29 | 2017-04-26 | 中国石油天然气股份有限公司 | Plugging device |
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| CN108999587A (en) | 2018-12-14 |
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