CN115059427A - Underground casing pipe repairing device and operation method - Google Patents
Underground casing pipe repairing device and operation method Download PDFInfo
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- CN115059427A CN115059427A CN202210988629.6A CN202210988629A CN115059427A CN 115059427 A CN115059427 A CN 115059427A CN 202210988629 A CN202210988629 A CN 202210988629A CN 115059427 A CN115059427 A CN 115059427A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000001502 supplementing effect Effects 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000008439 repair process Effects 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract description 23
- 239000003921 oil Substances 0.000 abstract description 7
- 239000010779 crude oil Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a device for repairing a downhole casing and an operation method, and belongs to the technical field of oil extraction engineering. An upper connector of the box body is connected with the upper part of the box body, a submersible motor is arranged in the upper connector, the submersible motor is connected with a driving shaft through an output shaft of a gear reducer through a coupler, the driving bevel gear on the driving shaft in the box body is meshed with a driven bevel gear, the output end of a driven shaft of the driven bevel gear is rotationally connected with a universal shaft pin hole through a pin shaft, the pin shaft is in interference fit with a vertical through hole on the driven shaft, and the universal shaft is inserted into a jack screw hexagonal blind hole; the centralizing plate below the boss at the lower part of the driving shaft is rotationally connected with the driving shaft and limited by a locking nut, and a safety pin is arranged between the centralizing plate and the bushing pipe; the jackscrew is in threaded connection with the sleeve compensating pipe; the sealing sleeve is arranged on the outer wall of the sleeve supplementing pipe. The invention has novel design and safe and convenient operation, provides a feasible repairing device and a feasible repairing method for repairing the casing of the oil well, and achieves the aims of reducing the scrappage of the oil well, improving the utilization rate of the oil well and increasing the crude oil yield of the oil well.
Description
Technical Field
The invention relates to the technical field of oil extraction processes of oil fields, in particular to a downhole casing repairing device and an operation method.
Background
At present, in the process of oil field development, oil well casing pipes are damaged due to the reasons of stratum stress action, corrosion of crude oil hydrogen sulfide, mechanical damage, perforation and the like, and the oil well casing pipes are damaged in three ways: stagger, perforation and crack. After the casing pipe is locally damaged, water layer water is discharged, and after the casing pipe is deformed and damaged, the casing pipe is not easy to repair, so that an oil well cannot be put into a production pipe column for normal production, and the oil well is scrapped by serious people.
By way of search, the following is compared with the prior art:
an oil well casing repairing device, patent number: 201220485700.0, the device comprises an oil pipe, a hydraulic anchor, an upper packer, a sleeve cement squeezing restrictor, a lower packer and a check valve, and is characterized in that: the oil pipe, the hydraulic anchor, the upper packer, the casing cement squeezing restrictor, the lower packer and the check valve are connected in sequence, and the device can be used for conveniently squeezing cement for the oil well casing at the leakage section and taking repairing measures for the damaged oil well casing. The utility model discloses utilize hydraulic anchor, go up the packer, the packer is sealed with the upper and lower of the impaired department of sleeve pipe down, then squeeze the cement with the crowded cement flow controller of sleeve pipe, restore the sleeve pipe, this method makes the sleeve pipe diameter diminish, influences the instrument and goes into down the well, the lower part oil reservoir exploitation of being not convenient for.
An apparatus and method for repairing oil well casing using iron-based shape memory alloy, patent No.: 200410019002.1, comprising: the device comprises an upper memory piston ring, a lower memory piston ring, an outer liner pipe, an inner liner pipe, a hydraulic cylinder, a reaming cone, a test pressure ring and a heater. The invention provides a carbide precipitation process and a memory feeding process which can greatly improve the memory recovery amount. The upper-middle memory piston ring and the lower memory piston ring are made of iron-based shape memory alloy, and are complex in manufacturing process, high in cost, complex in structure, high in operation difficulty and inconvenient to popularize and use.
Disclosure of Invention
The invention aims to solve the technical problems and provides a downhole casing repairing device and an operation method. Utilize submersible motor to pass through gear reducer output power, drive bevel gear drive mechanism truns into vertical axis rotary motion to horizontal axis rotary motion, through universal shaft drive drill head jackscrew, mends the pipe with the cover and is connected as an organic wholely with the bushing, and the centre is sealed through meeting water inflation seal cover, with the damaged hole shutoff of sleeve pipe, realizes that the oil well casing is restoreed.
The purpose of the invention is realized by the following technical scheme:
a downhole casing repair device comprising: the device comprises an upper joint, a box body, a submersible motor, a coupler, a driving shaft, a driving bevel gear, a driven shaft, jackscrews, a pin shaft, a universal shaft, a sleeve compensating pipe, a righting plate, a locking nut, a safety pin, a sealing sleeve and a sleeve; the method is characterized in that: the upper joint is connected with the upper part of the box body, the submersible motor is arranged in the upper joint and is connected with the driving shaft through an output shaft of the gear reducer through a coupler, the driving shaft in the box body is provided with a driving bevel gear which is meshed with a driven bevel gear, the driven bevel gear is arranged on a driven shaft, the output end of the driven shaft is rotatably connected with a pin hole of a universal shaft through a pin shaft, the pin shaft is in interference fit with a vertical through hole in the driven shaft, and a hexagonal head of the universal shaft is spliced with an inner hexagonal blind hole of a jack screw;
a centering plate is arranged below a boss at the lower part of the driving shaft, the centering plate is rotationally connected with the driving shaft and limited by a locking nut, and a safety pin is arranged between the centering plate and the bushing pipe;
the jackscrew is in threaded connection with the bushing pipe;
the sealing sleeve is arranged on the outer wall of the sleeve supplementing pipe.
Specifically, the box body is of a T-shaped or Y-shaped structure.
Specifically, the power of the submersible motor is output through a gear reducer.
Specifically, the number of the driven bevel gear transmission mechanisms is 2-3.
Specifically, the outer end of the jackscrew is provided with a drill bit, and the inner end of the jackscrew is provided with an inner hexagonal blind hole.
Specifically, the cardan shaft is one-level stepped shaft, and the diameter of inner end is greater than the diameter of driven shaft to be equipped with the width and be greater than the rectangle opening of driven shaft diameter, and be equipped with the pinhole that the diameter is a bit bigger than the round pin axle diameter at rectangle open-ended middle part vertical, the outer end of cardan shaft is equipped with the hexagonal head, and the size of hexagonal head is less than the interior hexagonal blind hole size of jackscrew slightly.
Specifically, the sleeve supplementing pipe is made of stainless steel, the upper inner hole and the lower inner hole are provided with bell mouths, 2-3 threaded holes matched with the jackscrews are radially and uniformly distributed on the upper portion, 2-3 through holes in interference fit with the safety pins are radially and uniformly distributed on the lower portion, and annular bosses are arranged on the outer diameters of the upper end and the lower end of the sleeve supplementing pipe.
Specifically, the righting plate is disc-shaped, the middle of the righting plate is provided with a through hole of which the diameter is slightly larger than that of the driving shaft, and 2-3 through holes in interference fit with the safety pins are uniformly distributed on the periphery of the righting plate.
Specifically, the sealing sleeve is a water-swelling water-stopping rubber sleeve.
An operation method of a downhole casing repairing device comprises the following steps:
the method comprises the following steps that firstly, a well original production pipe column is taken out, a drill pipe column is scraped downwards, sand is washed to a damaged position of a sleeve, the damaged position of the sleeve is accurately calculated, scraping is carried out until the scraped drill pipe column is smooth, and the scraped drill pipe column is taken out;
step two, a strong magnetic salvage device is arranged, the scraping iron pins in the well are sucked out, and the interior of the sleeve is cleaned;
step three, a drift diameter gauge is arranged, so that the drift diameter gauge is smooth in the sleeve;
determining the length of the bushing pipe according to the size of the damaged hole of the bushing, wherein the upper part and the lower part of the damaged hole are 0.8-1.2m generally;
connecting a cable to the submersible motor, making water proofing, penetrating out of a cable hole of the upper joint, connecting the upper joint with the drill pipe column, and binding the cable with the outside of the drill pipe to enable the middle part of the sleeve repair pipe to be positioned at the damaged hole of the sleeve;
step six, connecting a cable with a power supply, switching on the power supply, rotating a submersible motor, enabling power to pass through an output shaft and a coupler to be transmitted to a driving shaft, enabling a driving bevel gear to drive a driven bevel gear to rotate, enabling a driven shaft to drive a universal shaft to rotate through a pin shaft, enabling the universal shaft to drive a jackscrew to rotate, enabling a drill bit of the jackscrew to drill the inner wall of a sleeve, enabling a sleeve repairing pipe and the sleeve to be integrated, and repairing a damaged hole of the sleeve; the sealing sleeve expands when meeting water within a certain time, and the gap between the sleeve and the sleeve compensating pipe as well as the sealing sleeve is well sealed;
cutting off the power supply, pulling out the repairing pipe column, and after the drill bit of the jackscrew drills into the inner wall of the casing, because the universal shaft head is inserted with the jackscrew, the universal shaft head and the jackscrew are easily pulled out even though a section of insertion is arranged between the universal shaft head and the jackscrew; the safety pin between the centralizing plate at the lower part of the driving shaft and the sleeve repair pipe is made of aluminum alloy materials and is easy to cut off, the submersible motor, the transmission mechanism and the centralizing plate are pulled out, and the sleeve is repaired.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes a submersible motor to output power through a gear reducer to drive a bevel gear transmission mechanism, converts the rotary motion of a vertical shaft into the rotary motion of a horizontal shaft, drives a drill head type jackscrew through a universal shaft, connects a bushing pipe and a casing pipe into a whole, seals the bushing pipe through a water-swelling sealing sleeve, plugs a damaged hole of the casing pipe and realizes the repair of the oil well casing pipe. The invention has novel design and safe and convenient operation, provides a feasible repairing device and method for repairing the casing of the oil well, reduces the scrappage of the oil well, improves the utilization rate of the oil well and increases the crude oil yield of the oil well.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an exemplary embodiment of the invention and, together with the description, serve to explain the invention without limitation.
FIG. 1 is a schematic view of a front view of a full-section structure of the present invention
FIG. 2 is a schematic view of the structure of the jackscrew and the universal shaft of the present invention
In the figure: 0. an upper connector and 0-1 cable hole; 1. the device comprises a box body, 2, a submersible motor, 2-1, a gear reducer, 2-2, an output shaft and 2-3 cables; 3. a coupler, 4. a driving shaft, 4-1. a boss; 5. the driving bevel gear, the driven bevel gear 6, the driven shaft 7, the jackscrew 8, the drill bit 8-1 and the inner hexagonal blind hole 8-2; 9. the pin shaft, 10 universal shafts, 10-1 hexagonal heads, 10-2 rectangular openings and 10-3 pin holes; 11. the sleeve comprises a sleeve supplement pipe, 12 parts of a righting plate, 13 parts of a locking nut, 14 parts of a safety pin, 15 parts of a sealing sleeve, 16 parts of a sleeve and 16-1 parts of a damaged hole.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
The practice of the invention is further illustrated below with reference to the accompanying drawings:
as shown in fig. 1-2, a downhole casing repair device comprises: the device comprises an upper joint 0, a box body 1, a submersible motor 2, a coupler 3, a driving shaft 4, a driving bevel gear 5, a driven bevel gear 6, a driven shaft 7, a jackscrew 8, a pin shaft 9, a universal shaft 10, a sleeve supplementing pipe 11, a righting plate 12, a locking nut 13, a safety pin 14, a sealing sleeve 15 and a sleeve 16; the method is characterized in that: the upper connector 0 is connected with the upper part of the box body 1, the submersible motor 2 is arranged inside the upper connector 0, the submersible motor 2 is connected with the driving shaft 4 through a coupler 3 through an output shaft 2-2 of a gear reducer 2-1, a driving bevel gear 5 is arranged on the driving shaft 4 in the box body 1, the driving bevel gear 5 is meshed with a driven bevel gear 6, the driven bevel gear 6 is arranged on a driven shaft 7, the output end of the driven shaft 7 is rotatably connected with a pin hole 10-3 of a universal shaft 10 through a pin shaft 9, the pin shaft 9 is in interference fit with a vertical through hole on the driven shaft 7, and a hexagonal head 10-1 of the universal shaft 10 is spliced with an inner hexagonal blind hole 8-2 of a jackscrew 8;
a centralizing plate 12 is arranged below a boss 4-1 at the lower part of the driving shaft 4, the centralizing plate 12 is rotationally connected with the driving shaft 4 and limited by a locking nut 13, and a safety pin 14 is arranged between the centralizing plate 12 and the bushing pipe 11;
the jackscrew 8 is in threaded connection with the bushing pipe 11;
the sealing sleeve 15 is arranged on the outer wall of the bushing pipe 11.
Specifically, the box body 1 is of a T-shaped structure.
Specifically, the power of the submersible motor 2 is output through a gear reducer 2-1. The submersible motor 2 is preferably: the model is as follows: w6384 waterproof DC brushless motor; rated operating voltage: 29-50.4V; the maximum rotating speed is 6000 prm/min; maximum power of 2000W; peak current 40A; maximum torque at 60% 5N/m; the maximum working temperature is 120 ℃; water resistance grade IP 68; the weight was 1.27 kg.
Specifically, the number of the driven bevel gear 6 transmission mechanisms is 2.
Specifically, the outer end of the jackscrew 8 is provided with a drill 8-1, and the inner end of the jackscrew is provided with an inner hexagonal blind hole 8-2.
Specifically, the universal shaft 10 is a first-stage stepped shaft, the diameter of the inner end of the universal shaft is larger than that of the driven shaft 7, the rectangular opening 10-2 with the width larger than that of the driven shaft 7 is arranged, a pin hole 10-3 with the diameter slightly larger than that of the pin shaft 9 is vertically arranged in the middle of the rectangular opening 10-2, the outer end of the universal shaft 10 is provided with a hexagonal head 10-1, and the size of the hexagonal head 10-1 is slightly smaller than that of an inner hexagonal blind hole 8-2 of the jackscrew 8.
The jackscrew 8 is an M18 bolt, an inner hexagonal blind hole 8-2 of the jackscrew 8 is in plug fit with a hexagonal head 10-1 at the outer end of the cardan shaft 10, and the diameter of a circumscribed circle of the hexagonal head 10-1 is 13 mm.
Specifically, cover mends pipe 11 and is stainless steel, and the wall thickness is 10mm, and the upper and lower hole is equipped with the horn mouth, and the radial equipartition in upper portion is equipped with 2 and 8 complex screw holes of jackscrew, and the radial equipartition in lower part is equipped with 3 and 14 interference fit's of safety pin through-holes, and the upper and lower both ends external diameter of cover mend pipe 11 is equipped with the annular boss that the width is 5 mm.
Specifically, the righting plate 12 is disc-shaped, the middle of the righting plate is provided with a through hole with the diameter slightly larger than that of the driving shaft 4, and the periphery of the righting plate is uniformly provided with 3 through holes in interference fit with the safety pins 14.
Specifically, seal cover 15 is for meeting water inflation rubber sleeve, operating temperature: the expansion rate is more than or equal to 200 percent at minus 30 to plus 80 ℃, the wall thickness of the sealing sleeve 15 is 5mm, and the annular space between the sealing sleeve 15 and the sleeve 16 is 2 mm.
The operation method of the underground casing repairing device comprises the following steps:
step 3, taking out the original production pipe column in the well, scraping the drill pipe column downwards, washing sand to the damaged hole 16-1 of the sleeve 16, accurately calculating the damaged position of the sleeve 16, scraping until the scraped drill pipe column is smooth, and taking out the scraped drill pipe column;
step 4, a strong magnetic salvage device is arranged, the scraping iron pins in the well are sucked out, and the interior of the sleeve 16 is cleaned;
step 5, a drift diameter gauge is arranged down, so that the drift diameter gauge is smooth in the sleeve 16; the diameter of the drift diameter gauge is 3-4mm smaller than that of the sleeve;
step 6, determining the length of the bushing and repairing pipe 11 according to the size of the damaged hole 16-1 of the bushing 16, wherein the upper part and the lower part of the damaged hole 16-1 are 0.8-1.2m generally;
step 7, connecting a cable 2-3 to the submersible motor 2, well performing waterproofing, penetrating out of a cable hole 0-1 of an upper connector 0, connecting the upper connector 0 with a drill pipe column, and binding the cable 2-3 with the outside of the drill pipe to enable the middle part of the bushing pipe 11 to be positioned at a damaged hole 16-1 of the sleeve 16;
step 8, connecting a cable 2-3 with a power supply, switching on the power supply, rotating a submersible motor 2, driving power to a driving shaft 4 through an output shaft 2-2 and a coupler 3, driving a driven bevel gear 6 to rotate through a driving bevel gear 5, driving a universal shaft 10 to rotate through a pin shaft 9 through a driven shaft 7, driving a jackscrew 8 to rotate through the universal shaft 10, drilling a drill bit 8-1 of the jackscrew 8 into the inner wall of a sleeve 16, integrating a sleeve supplementing pipe 11 with the sleeve 16, and supplementing a damaged hole 16-1 of the sleeve 16; the sealing sleeve 15 expands when meeting water within a certain time, the expansion rate reaches 200% in 48 hours, and the gaps among the sleeve 16, the sleeve supplementing pipe 11 and the sealing sleeve 15 are well sealed;
According to the underground casing pipe repairing device and the operation method, the submersible motor 2 outputs power through the gear reducer 2-1 to drive the driving bevel gear 5 to rotate anticlockwise to drive the driven bevel gear 6, the vertical shaft rotation motion is converted into the horizontal shaft clockwise rotation motion, the jackscrew 8 is driven to rotate through the universal shaft 10, the drill bit 8-1 of the jackscrew 8 drills into the casing pipe 16, the threaded part of the jackscrew 8 is left in the pipe wall of the casing pipe 11, the inner end of the jackscrew is level with the casing pipe 11, the casing pipe 11 and the casing pipe 16 are connected into a whole, the middle of the casing pipe is sealed through the water expansion sealing sleeve 15, the damaged hole 16-1 of the casing pipe 16 is plugged, and the oil well casing pipe 16 is repaired. The invention has safe and convenient operation, provides a feasible repairing device and method for repairing the oil well casing, and achieves the aims of reducing oil well scrap, improving the oil well utilization rate and increasing the crude oil yield of the oil well.
While preferred embodiments of the present invention have been described above, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted to embrace the preferred embodiments and all such variations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A downhole casing repair device comprising: the device comprises an upper joint (0), a box body (1), a submersible motor (2), a coupler (3), a driving shaft (4), a driving bevel gear (5), a driven bevel gear (6), a driven shaft (7), a jackscrew (8), a pin shaft (9), a universal shaft (10), a bushing pipe (11), a righting plate (12), a locking nut (13), a safety pin (14), a sealing sleeve (15) and a sleeve (16); the method is characterized in that: the upper joint (0) is connected with the upper part of the box body (1), the submersible motor (2) is arranged inside the upper joint (0), the submersible motor (2) is connected with the driving shaft (4) through the coupling (3) through the output shaft (2-2) of the gear reducer (2-1), a driving bevel gear (5) is arranged on the driving shaft (4) in the box body (1), the driving bevel gear (5) is meshed with a driven bevel gear (6), the driven bevel gear (6) is arranged on the driven shaft (7), the output end of the driven shaft (7) is rotatably connected with a pin hole (10-3) of a universal shaft (10) through a pin shaft (9), the pin shaft (9) is in interference fit with a vertical through hole in the driven shaft (7), and a hexagonal head (10-1) of the universal shaft (10) is inserted into an inner hexagonal blind hole (8-2) of a jackscrew (8);
a righting plate (12) is arranged below a boss (4-1) at the lower part of the driving shaft (4), the righting plate (12) is rotatably connected with the driving shaft (4) and limited by a locking nut (13), and a safety pin (14) is arranged between the righting plate (12) and the bushing pipe (11);
the jackscrew (8) is in threaded connection with the bushing pipe (11);
the sealing sleeve (15) is arranged on the outer wall of the sleeve supplementing pipe (11).
2. A downhole casing repair device according to claim 1, wherein: the box body (1) is of a T-shaped or Y-shaped structure.
3. A downhole casing repair device according to claim 1, wherein: the power of the submersible motor (2) is output through a gear reducer (2-1).
4. A downhole casing repair device according to claim 1, wherein: the number of the driven bevel gear (6) transmission mechanisms is 2-3.
5. A downhole casing repair device according to claim 1, wherein: the outer end of the jackscrew (8) is provided with a drill bit (8-1), and the inner end of the jackscrew is provided with an inner hexagonal blind hole (8-2).
6. A downhole casing repair device according to claim 1, wherein: the universal shaft (10) is a one-stage stepped shaft, the diameter of the inner end of the universal shaft is larger than that of the driven shaft (7), a rectangular opening (10-2) with the width larger than that of the driven shaft (7) is arranged, a pin hole (10-3) with the diameter slightly larger than that of the pin shaft (9) is vertically arranged in the middle of the rectangular opening (10-2), a hexagonal head (10-1) is arranged at the outer end of the universal shaft (10), and the size of the hexagonal head (10-1) is slightly smaller than that of an inner hexagonal blind hole (8-2) of the jackscrew (8).
7. A downhole casing repair device according to claim 1, wherein: the sleeve supplementing pipe (11) is made of stainless steel, the upper inner hole and the lower inner hole are provided with bell mouths, the upper portion is radially and uniformly provided with 2-3 threaded holes matched with the jackscrews (8), the lower portion is radially and uniformly provided with 2-3 through holes in interference fit with the safety pins (14), and the outer diameters of the upper end and the lower end of the sleeve supplementing pipe (11) are provided with annular bosses.
8. A downhole casing repair device according to claim 1, wherein: the righting plate (12) is disc-shaped, the middle of the righting plate is provided with a through hole of which the diameter is slightly larger than that of the driving shaft (4), and the periphery of the righting plate is uniformly provided with 2-3 through holes in interference fit with the safety pins (14).
9. A downhole casing repair device according to claim 1, wherein: the sealing sleeve (15) is a water-swelling rubber sealing sleeve capable of expanding when encountering water.
10. An operation method of a downhole casing repairing device comprises the following steps:
step 1, a well original production pipe column is taken out, a drill pipe column is scraped downwards, sand is washed to a damaged hole (16-1) of a sleeve (16), the damaged position of the sleeve (16) is accurately calculated, scraping is carried out until the scraped drill pipe column is smooth, and the scraped drill pipe column is taken out;
step 2, a strong magnetic salvage device is arranged, the scraping iron pins in the well are sucked out, and the interior of the casing (16) is cleaned;
step 3, a drift diameter gauge is arranged, so that the drift diameter gauge is smooth and unobstructed in the sleeve (16);
step 4, determining the length of the bushing repair pipe (11) according to the size of the damaged hole (16-1) of the bushing (16), wherein the upper part and the lower part of the bushing repair pipe (11) are generally 0.8-1.2 m;
step 5, connecting a cable (2-3) with the submersible motor (2), well performing waterproofing, penetrating out of a cable hole (0-1) of the upper joint (0), connecting the upper joint (0) with a drill pipe column, and binding the cable with the outside of the drill pipe to enable the middle part of the sleeve repair pipe (11) to be positioned at a damaged hole (16-1) of the sleeve (16);
step 6, connecting a cable with a power supply, switching on the power supply, rotating a submersible motor (2), enabling power to pass through an output shaft (2-2) and a coupler (3) to a driving shaft (4), driving a bevel gear (5) to drive a driven bevel gear to rotate, driving a universal shaft (10) to rotate by a driven shaft (7) through a pin shaft (9), driving a jackscrew (8) to rotate by the universal shaft (10), drilling a drill bit (8-1) of the jackscrew (8) into the inner wall of a sleeve (16), integrating a sleeve repairing pipe (11) and the sleeve (16), and repairing a damaged hole (16-1) of the sleeve (16); the sealing sleeve (15) expands when meeting water within a certain time, and a gap between the sleeve (16) and the sleeve supplementing pipe (11) and a gap between the sealing sleeve (15) are well sealed;
step 7, cutting off a power supply, pulling out the repaired pipe column, and after a drill bit (8-1) of the jackscrew (8) drills into the inner wall of the casing (16), because the cardan shaft (10) is spliced with the jackscrew (8), the jackscrew can be easily pulled out even if a section of the cardan shaft is spliced; the safety pin (14) between the centralizing plate (12) at the lower part of the driving shaft (4) and the sleeve compensating pipe (11) is made of aluminum alloy materials and is easy to cut off, the submersible motor (2), the transmission mechanism and the centralizing plate (12) are pulled out, and the sleeve (16) is repaired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210988629.6A CN115059427B (en) | 2022-08-17 | 2022-08-17 | Underground casing pipe repairing device and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210988629.6A CN115059427B (en) | 2022-08-17 | 2022-08-17 | Underground casing pipe repairing device and operation method |
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| US5829524A (en) * | 1996-05-07 | 1998-11-03 | Baker Hughes Incorporated | High pressure casing patch |
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| CN114837605A (en) * | 2022-05-31 | 2022-08-02 | 中国石油化工股份有限公司 | Oil increasing method for casing damage well free of hole repairing suspension |
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| US5829524A (en) * | 1996-05-07 | 1998-11-03 | Baker Hughes Incorporated | High pressure casing patch |
| CN205445522U (en) * | 2015-12-30 | 2016-08-10 | 中国石油天然气股份有限公司 | Controllable formula is from expandable casing subsidy pipe in pit |
| CN109707333A (en) * | 2018-11-15 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding subsidy method |
| CN211144424U (en) * | 2020-06-24 | 2020-07-31 | 山东永利精工石油装备股份有限公司 | Sleeve leakage-mending type plugging pipe |
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