Oil well casing patching tool
By designing the scraper and extrusion plate structure of the oil well casing patching tool, oil sludge is cleaned and the patching pipe is tightly fitted to the casing, solving the problem of oil sludge affecting the patching effect and achieving a better leak-sealing effect.
Patent Information
- Application Number
- CN202520343243.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-28
AI Technical Summary
During the process of attaching oil well casing, oil contamination forms an isolation layer between the attach pipe and the inner wall of the original casing, affecting the attaching effect and preventing the attach pipe from fitting tightly against the inner wall of the casing, thus affecting the sealing effect.
An oil well casing patching tool was designed, comprising a housing, a power box, a drive motor, a scraper, and a squeezing plate. The scraper cleans the oil stains on the inner wall, and the hydraulic cylinder and conical block push the squeezing plate to squeeze the patching tube so that it fits tightly against the inner wall of the casing. The gaps are then sealed by rubber that expands when exposed to water.
Effective cleaning of inner wall oil stains ensures tight contact between the subsidy pipe and the casing, improves the stability and leak-stopping effect of the subsidy, prevents the subsidy pipe from slipping or misaligning, and enhances the reliability of the subsidy.
Smart Images
Figure CN223854203U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of casing patching, especially relates to an oil well casing patching tool. BACKGROUND
[0002] In the oil well exploitation process, casing is in contact with formation fluid, chemical substances and the like for a long time, is prone to corrosion, appears damage such as hole, crack and the like, influences normal production and sealing performance of the oil well, and casing patching needs to be carried out to restore the integrity of casing, wherein the expansion pipe patching technology is to lower the metal expansion pipe with good plasticity into the well, makes it expand in the diameter direction through mechanical or hydraulic method, directly patches and seals the damaged casing, the expanded casing is closely combined with the inner wall of the original casing, plays the role of reinforcement and sealing, and under the cold work hardening effect, the pipe material strength and rigidity can also be improved.
[0003] When patching the casing, the patching pipe needs to be used to reinforce and seal the damaged part of the casing, when the casing is used for a long time, part of crude oil is attached to the inner wall of the casing, forms oil stain, and when patching, the oil stain forms an isolation layer between the patching pipe and the inner wall of the original casing, so that the patching pipe cannot be closely combined with the inner wall of the casing, and the patching effect is influenced. UTILITY MODEL CONTENTS
[0004] In order to solve the above problems, the utility model provides an oil well casing patching tool to more exactly solve the above problems.
[0005] The utility model realizes the following technical scheme:
[0006] The utility model provides an oil well casing patching tool, including the casing, one side of the casing is equipped with the patching subassembly, the other side of the casing is installed with the power box, and the driving motor is installed in the power box, the main shaft of the driving motor is rotatably connected with the casing, the inside of the casing is equipped with the cleaning assembly, and the cleaning assembly is used for cleaning the inner wall of the casing.
[0007] In one example, the cleaning assembly includes four scrapers, the four scrapers are through the casing and are slidably connected with the casing, both sides of the scraper are fixedly connected with the fixed plate, the fixed plate and the side wall of the casing are fixedly connected with the first spring, the side wall of the casing is fixedly connected with the horizontal plate, the upper surface of the horizontal plate is fixedly connected with the hydraulic cylinder, and the telescopic rod of the hydraulic cylinder is fixedly connected with the conical block.
[0008] In one example, the corners above all the scrapers are all equipped with arc surfaces.
[0009] In one example, the subsidy assembly comprises a first fixed block and a second fixed block, the first fixed block is fixedly connected with the shell, the opposite side of the first fixed block and the second fixed block is provided with a circular groove, the opposite side of the first fixed block and the second fixed block is provided with an arc-shaped channel, the two ends of the channel are communicated with the circular groove, a circular column is fixedly connected between the first fixed block and the second fixed block, a circular through groove is arranged in the circular column, the circular through groove is communicated with the channel, two sliding blocks are slidably connected on the circular column, the sliding blocks are located in the circular groove, the opposite side of the sliding blocks is tapered, four extrusion plates are slidably connected on the outer side of the circular column, the two ends of the extrusion plates extend into the circular groove of the first fixed block and the second fixed block, and the circular through groove and the channel are filled with hydraulic oil.
[0010] In one example, the side wall of the circular column is fixedly connected with a plurality of fixed cylinders, a sliding rod is slidably connected in the fixed cylinder, the sliding rod is fixedly connected with the extrusion plate, and the extrusion plate is fixedly connected with the second spring between the circular column.
[0011] In one example, the inner wall of the shell is fixedly connected with a storage cylinder, the storage cylinder is communicated with the channel in the first fixed block, the storage cylinder stores hydraulic oil, a sliding plate is slidably connected in the storage cylinder, and a third spring is fixedly connected between the sliding plate and the fixed cylinder.
[0012] In one example, the outer side of the second fixed block is fixedly connected with an elastic rubber ring.
[0013] The oil well casing subsidy tool can bring the following beneficial effects:
[0014] Firstly, the scraper is arranged, the hydraulic cylinder drives the conical block to descend, the conical block contacts all the scrapers, the scrapers are pushed outward, the scrapers abut against the inner wall of the casing, then the driving motor in the power box starts, drives the shell to rotate, and the inner wall of the casing is scraped and cleaned through the scraper, the oil stains adhered to the inner wall are cleaned before the subsidy, the subsidy pipe can better contact the casing, the stability of the subsidy pipe is improved, a large amount of oil stains is avoided to be left between the subsidy pipe and the casing, the subsidy pipe is prevented from falling off and being dislocated with the damaged position of the casing, and the plugging effect is affected.
[0015] Secondly, the extrusion plate is arranged, the lower end of the conical block contacts the sliding plate and presses the sliding plate downward, the hydraulic oil in the storage cylinder enters the channel of the first fixed block and the second fixed block, and enters the circular groove along the channel, the two sliding blocks are pushed to approach each other, the sliding blocks push the extrusion plates outward through the tapered surface on one side, the extrusion plates extrude the inner wall of the subsidy pipe, the subsidy pipe is expanded, the subsidy pipe abuts against the inner wall of the casing, and the subsidy pipe is fixed, at this time, the outer side of the subsidy pipe is provided with the rubber that expands when meeting water, when the subsidy pipe is expanded and abuts against the inner wall of the casing, the rubber expands when meeting water, the gap between the subsidy pipe and the casing is blocked, and the plugging effect of the subsidy pipe on the damaged position is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] The drawings described herein are intended to provide further understanding of the present application, form a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation of the present application.
[0017] In the drawings:
[0018] Figure 1 is a structural schematic view of the present application.
[0019] Figure 2 is a sectional structural schematic view of the present application.
[0020] Figure 3 is a structural schematic view of the cleaning assembly of the present application.
[0021] Figure 4 is a structural schematic view of the subsidy assembly of the present application.
[0022] Figure 5 is a structural schematic view of the extrusion plate of the present application.
[0023] In the drawings: 1, shell; 2, subsidy assembly; 21, first fixed block; 22, second fixed block; 23, channel; 24, circular column; 25, sliding block; 26, extrusion plate; 3, power box; 4, driving motor; 5, cleaning assembly; 51, scraper; 52, fixed plate; 53, first spring; 54, horizontal plate; 55, hydraulic cylinder; 56, conical block; 6, fixed cylinder; 7, sliding rod; 8, second spring; 9, storage cylinder; 10, sliding plate; 11, third spring; 12, elastic rubber ring. DETAILED DESCRIPTION
[0024] In order to more clearly explain the overall concept of the present application, the following will be described in detail in an exemplary manner with reference to the drawings of the specification.
[0025] As Figures 1-5The utility model discloses an oil well casing patching tool, including the casing 1, the one side of casing 1 is equipped with the patching subassembly 2, the other side of casing 1 is installed with power box 3, and drive motor 4 is installed in power box 3, and the main shaft of drive motor 4 is rotatably connected with casing 1, and the inside of casing 1 is equipped with cleaning assembly 5, and cleaning assembly 5 is used for cleaning the inner wall of casing, and cleaning assembly 5 includes four scrapers 51, four scrapers 51 are through casing 1 and are slidably connected with casing 1, and both sides of scraper 51 are fixedly connected with fixed plate 52, and fixed plate 52 is fixedly connected with first spring 53 between casing 1 side wall, and the side wall of casing 1 is fixedly connected with crosspiece 54, and the upper surface of crosspiece 54 is fixedly connected with hydraulic cylinder 55, and the telescopic rod of hydraulic cylinder 55 is fixedly connected with conical block 56, and all the corners above scraper 51 are equipped with cambered surface, when using, the device is used in combination with magnetic positioner, one side of power box 3 is connected with traction device, and the patching pipe is sleeved on patching subassembly 2, and casing 1 is placed into casing, along with the extension of casing 1, when locating to the damaged position, first make cleaning assembly 5 on casing 1 correspond with the damaged position, when hydraulic cylinder 55 starts, push down conical block 56, and conical block 56 contacts all scrapers 51, and scraper 51 is pushed outwards, and scraper 51 is abutted against the inner wall of casing, then drive motor 4 in power box 3 starts, drives casing 1 to rotate, and the inner wall of casing is scraped and cleaned through scraper 51, and the oil dirt on the inner wall is cleaned, then the traction device pulls casing 1 to rise, and makes patching subassembly 2 correspond with the damaged position through the patching pipe and carries out patching and plugging, through setting up scraper 51, the oil dirt adhered to the inner wall is cleaned before patching, makes the patching pipe better contact with casing, improves the stability of patching pipe, avoids remaining a large amount of oil dirt between patching pipe and casing, causes the patching pipe to slide off, and the damaged position is dislocated with casing, influences the plugging effect.
[0026] As Figure 2 , Figure 3 , Figure 4 And Figure 5As shown, the subsidy assembly 2 includes a first fixed block 21 and a second fixed block 22, the first fixed block 21 is fixedly connected with the shell 1, the opposite side of the first fixed block 21 and the second fixed block 22 is provided with a circular groove, the opposite side of the first fixed block 21 and the second fixed block 22 is provided with an arc-shaped channel 23, both ends of the channel 23 are communicated with the circular groove, a circular column 24 is fixedly connected between the first fixed block 21 and the second fixed block 22, a circular through slot is arranged in the circular column 24, the circular through slot is communicated with the channel 23, two sliding blocks 25 are slidingly connected on the circular column 24, the sliding blocks 25 are located in the circular groove, the opposite side of the sliding blocks 25 is conical, four extrusion plates 26 are slidingly connected on the outer side of the circular column 24, the two ends of the extrusion plates 26 extend into the circular groove of the first fixed block 21 and the second fixed block 22, the circular through slot and the channel 23 are filled with hydraulic oil, a plurality of fixed cylinders 6 are fixedly connected on the side wall of the circular column 24, a sliding rod 7 is slidingly connected in the fixed cylinder 6, the sliding rod 7 is fixedly connected with the extrusion plate 26, a second spring 8 is fixedly connected between the extrusion plate 26 and the circular column 24, a storage cylinder 9 is fixedly connected on the inner wall of the shell 1, the storage cylinder 9 is communicated with the channel 23 in the first fixed block 21, the storage cylinder 9 stores hydraulic oil, a sliding plate 10 is slidingly connected in the storage cylinder 9, a third spring 11 is fixedly connected between the sliding plate 10 and the fixed cylinder 6, an elastic rubber ring 12 is fixedly connected on the outer side of the second fixed block 22, before the device enters the sleeve, the extrusion elastic rubber ring 12 sleeves the subsidy pipe on the outer side of the extrusion plate 26, the lower end is blocked by the elastic rubber ring 12 and will not fall off, after cleaning the tank wall, at this time the hydraulic cylinder 55 pulls the conical block to reset, the scraper 51 is retracted, at this time the traction device pulls the shell 1 to move upward, the subsidy assembly 2 is aligned with the damaged part, then the hydraulic cylinder 55 pushes the conical block 56 again, the scraper 51 is abutted on the sleeve, the position of the fixing device, then the conical block 56 continues to descend, the lower end of the conical block 56 contacts the sliding plate 10 and presses the sliding plate 10 downward, the hydraulic oil in the storage cylinder 9 enters the channel 23 of the first fixed block 21 and the second fixed block 22, and enters the circular groove along the channel 23, pushes the two sliding blocks 25 to move close to each other, the sliding blocks 25 push the extrusion plate 26 outward through the conical surface on one side, the extrusion plate 26 extrudes the inner wall of the subsidy pipe, expands the subsidy pipe, the subsidy pipe abuts against the inner wall of the sleeve, fixes the subsidy pipe, at this time the outer side of the subsidy pipe is sleeved with rubber that expands when encountering water, after the subsidy pipe expands and abuts against the inner wall of the sleeve, the rubber expands when encountering water, blocks the gap between the subsidy pipe and the sleeve, improves the plugging effect of the subsidy pipe on the damaged part, then the hydraulic cylinder 55 pulls the conical block to reset, the scraper 51 is retracted, the sliding plate 10 is reset under the pushing of the third spring 11, the hydraulic oil flows back, the sliding block 25 is reset, the second spring 8 pulls the extrusion plate 26 to reset and separate from the subsidy pipe, then the shell 1 and other equipment can be pulled out from the sleeve, the device can be continuously used after replacing the subsidy pipe, and the operation is more flexible and simple.
[0027] Working principle: the extrusion elastic rubber ring 12 will the subsidy pipe set on the outside of the extrusion plate 26, put the shell 1 into the sleeve, with the shell 1 into, when positioning to the damaged position, make the cleaning assembly 5 on the shell 1 correspond to the damaged position first, the hydraulic cylinder 55 starts, pushes the conical block down, the conical block contacts all the scrapers 51, pushes the scraper 51 outward, the scraper 51 abuts against the inner wall of the sleeve, then the driving motor 4 in the power box 3 starts, drives the shell 1 to rotate, scrapes the inner wall of the sleeve through the scraper 51, cleans the oil stain on the inner wall, the traction device pulls the shell 1 up, makes the subsidy assembly 2 correspond to the damaged position, the hydraulic cylinder 55 pulls the conical block back to the original position, the scraper 51 retracts, at this time the traction device pulls the shell 1 up, makes the subsidy assembly 2 align with the damaged position, then the hydraulic cylinder 55 pushes the conical block 56 again, makes the scraper 51 abut against the sleeve, the position of the fixing device, then the conical block 56 continues to descend, the lower end of the conical block 56 contacts the sliding plate 10 and presses the sliding plate 10, the hydraulic oil in the storage cylinder 9 enters the channel 23 between the first fixed block 21 and the second fixed block 22, and enters the circular groove along the channel 23, pushes the two sliding blocks 25 close to each other, the sliding block 25 pushes the extrusion plate 26 outward through the conical surface on one side, the extrusion plate 26 extrudes the inner wall of the subsidy pipe, expands the subsidy pipe, the subsidy pipe abuts against the inner wall of the sleeve, fixes the subsidy pipe, at this time the outer side of the subsidy pipe is sleeved with the rubber that expands when meeting water, when the subsidy pipe expands and abuts against the inner wall of the sleeve, the rubber expands when meeting water, blocks the gap between the subsidy pipe and the sleeve.
[0028] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments. Especially, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.
[0029] The above only describes the embodiments of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the claim range of the utility model.
Claims
1. An oil well casing patch tool, characterized by, The utility model provides a kind of pipe cleaning device, including shell (1), one side of the shell (1) is equipped with subsidy component (2), the other side of the shell (1) is equipped with power box (3), driving motor (4) is installed in power box (3), the main shaft of driving motor (4) is rotatably connected with shell (1), the inside of the shell (1) is equipped with cleaning component (5), and the cleaning component (5) is used to clean the inner wall of sleeve.
2. A well casing patch tool according to claim 1 wherein, The cleaning component (5) includes four scrapers (51), four scrapers (51) are connected with the shell (1) slidingly, the two sides of the scraper (51) are fixedly connected with the fixed plate (52), the fixed plate (52) is fixedly connected with the first spring (53) between the side wall of the shell (1), the side wall of the shell (1) is fixedly connected with the horizontal plate (54), the upper surface of the horizontal plate (54) is fixedly connected with the hydraulic cylinder (55), and the telescopic rod of the hydraulic cylinder (55) is fixedly connected with the conical block (56).
3. A well casing patch tool according to claim 2, wherein, All the corners above the scraper (51) are provided with arc surfaces.
4. A well casing patch tool as defined in claim 3 wherein, The subsidy component (2) includes a first fixed block (21) and a second fixed block (22), the first fixed block (21) is fixedly connected with the shell (1), the first fixed block (21) and the second fixed block (22) are provided with circular grooves on the opposite sides, the first fixed block (21) and the second fixed block (22) are provided with arc-shaped channels (23) on the opposite sides, the channels (23) are communicated with the circular grooves at both ends, the first fixed block (21) and the second fixed block (22) are fixedly connected with a circular column (24), the circular column (24) is provided with a circular through groove, the circular through groove is communicated with the channel (23), the circular column (24) is slidably connected with two sliding blocks (25) on the outside, the sliding blocks (25) are located in the circular grooves, the opposite side of the sliding block (25) is conical, the outside of the circular column (24) is slidably connected with four extrusion plates (26), the two ends of the extrusion plate (26) extend into the circular grooves of the first fixed block (21) and the second fixed block (22), and the circular through groove and the channel (23) are filled with hydraulic oil.
5. A well casing patch tool as defined in claim 4 wherein, The side wall of the circular column (24) is fixedly connected with a plurality of fixed cylinders (6), the sliding rod (7) is slidably connected in the fixed cylinder (6), the sliding rod (7) is fixedly connected with the extrusion plate (26), and the second spring (8) is fixedly connected between the extrusion plate (26) and the circular column (24).
6. A well casing patch tool as defined in claim 5 wherein, The inner wall of the shell (1) is fixedly connected with a storage cylinder (9), the storage cylinder (9) is communicated with the channel (23) in the first fixed block (21), the storage cylinder (9) stores hydraulic oil, and the sliding plate (10) is slidably connected in the storage cylinder (9).
7. A well casing patch tool as defined in claim 4 wherein, The outside of the second fixed block (22) is fixedly connected with an elastic rubber ring (12).