CN111894504B - Hydraulic sealing patch connector suitable for casing and oil pipe - Google Patents
Hydraulic sealing patch connector suitable for casing and oil pipe Download PDFInfo
- Publication number
- CN111894504B CN111894504B CN202010747764.2A CN202010747764A CN111894504B CN 111894504 B CN111894504 B CN 111894504B CN 202010747764 A CN202010747764 A CN 202010747764A CN 111894504 B CN111894504 B CN 111894504B
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- CN
- China
- Prior art keywords
- shell
- oil pipe
- sealing
- hydraulic
- casing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
Abstract
The invention relates to a hydraulic sealing patch connector suitable for a casing and an oil pipe, belonging to the technical field of petroleum operation equipment, which comprises a shell and a shoe guide, wherein the shell is a cylindrical barrel, more than two groups of longitudinal channels are uniformly distributed on the inner wall of the middle part of the shell, the top ends of the longitudinal channels are communicated with the inner cavity of the shell through horizontal channels, the tail ends of the longitudinal channels are arranged in an expanding piston cavity at the lower part of the shell, the upper parts of the longitudinal channels are internally and respectively connected with a one-way valve in a threaded manner, more than one group of grooves are uniformly distributed in the middle part of the inner hole of the shell, sealing rings are embedded in the grooves, a hydraulic piston tooth-shaped ring is fixedly arranged in the expanding piston cavity, the bottom end of the shell is connected with the shoe guide through threads, and a cutting knife block is fixedly arranged in the shoe guide. The hydraulic sealing patch connector suitable for the casing and the oil pipe has the advantages of simple structure, convenience in use and operation, high working efficiency and capability of quickly recovering a normal production channel of a fault well, and is particularly suitable for patch connection of underground broken and disconnected pipe columns.
Description
Technical Field
The invention belongs to the technical field of petroleum operation equipment, and particularly relates to a hydraulic sealing patch connector suitable for a casing and an oil pipe.
Background
In the prior art, the underground production pipe column has weak points due to corrosion and the like, the underground pipe column is broken and separated in the production process, and cannot produce, but conventional salvage operation cannot be carried out due to underground complex working conditions, measures need to be taken to carry out repair connection on an underground broken and separated oil pipe so as to recover a normal production channel of a fault well or establish normal well bottom circulation.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a hydraulic sealing patch connector suitable for a casing and an oil pipe.
The invention relates to a hydraulic sealing patch connector suitable for a casing and an oil pipe, which consists of a shell and a shoe guide, wherein the lower end of the shell is connected with the shoe guide through threads, the shell is a cylindrical barrel, more than two groups of longitudinal channels are uniformly distributed on the inner wall of the middle section of the shell, the top ends of the longitudinal channels are communicated with the inner cavity of the shell through horizontal channels, the tail ends of the longitudinal channels are communicated with an expanding piston cavity at the lower section of the shell, and a hydraulic piston toothed ring is arranged in the expanding piston cavity; the upper part of the longitudinal channel is internally and spirally connected with a one-way valve, more than one group of grooves are uniformly distributed on the inner circumference of the middle section of the shell, and sealing rings are embedded in the grooves; the shoe guide is internally and fixedly provided with a cutting knife block.
As a further improvement of the invention, an annular groove is arranged at the lower part of the middle section of the shell, the upper end of the hydraulic piston tooth-shaped ring is arranged in the groove, piston sealing rings are arranged on the inner and outer circumferences of the upper part of the hydraulic piston tooth-shaped ring, and the piston sealing rings are connected with the connecting part at the upper end of the expanding piston cavity in a sealing way.
As a further improvement of the invention, more than one group of lock pin fixing holes are arranged on the inner wall of the groove, transverse lock pins are arranged in the lock pin fixing holes, springs are sleeved on the lock pins, and a limiting hole is formed in the inner annular wall of the upper end of the hydraulic piston toothed ring.
As a further improvement of the invention, a clamping table is arranged in an upper inner cavity of the middle section of the shell, and a high-pressure rubber plug is arranged on the upper part of the clamping table.
As a further improvement of the invention, the front end of the shoe guide is spiral.
The hydraulic sealing patch connector suitable for the casing and the oil pipe has the characteristics of reasonable structure, convenience in use and operation, low manufacturing cost and the like, is particularly suitable for patch connection of underground broken and disconnected pipe columns, has high working efficiency, can quickly recover a normal production channel of a fault well, can trim the end face of the casing at the damaged position through the cutting tool block during patch connection, ensures that the end face is flat, does not hinder other tools from entering the well at the later stage, has good compression resistance after patch connection, and has long service life at the patch connection position.
Drawings
FIG. 1 is a longitudinal cross-sectional view of the present invention;
fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The invention relates to a hydraulic sealing patch connector suitable for a casing and an oil pipe, which consists of a shell 1 and a shoe guide 9, wherein the shell 1 is a cylindrical barrel, the front end of the shoe guide 9 is spiral, and a cutting knife block 10 is fixedly arranged in the shoe guide 9; the lower end of the shell 1 is connected with a shoe guide 9 through screw threads.
More than two groups of longitudinal channels 11 are uniformly distributed on the inner wall of the middle section of the shell 1, the longitudinal channels 11 are internally connected with one-way valves 2 in a threaded manner, the top ends of the longitudinal channels 11 are communicated with the inner cavity of the shell 1 through horizontal channels 12, the tail ends of the longitudinal channels 11 are communicated with an expanding piston cavity 13 at the lower section of the shell 1, and the upper ends of the expanding piston cavities 13 are annular grooves at the lower part of the middle section of the shell 1, namely the tail ends of the longitudinal channels 11 are communicated with the annular grooves; the upper end of the hydraulic piston tooth-shaped ring 5 is arranged in the annular groove, piston sealing rings 6 are arranged on the inner and outer circumferences of the upper part of the hydraulic piston tooth-shaped ring 5 and are in sealing connection with the connecting part at the upper end of the expanding piston cavity 13 through the piston sealing rings 6. More than one group of lock pin fixing holes 15 are arranged on the inner wall of the groove, transverse lock pins 8 are arranged in the lock pin fixing holes 15, a baffle plate is arranged at the front end of each lock pin 8, the lock pins 8 at the rear end of the baffle plate are sleeved with springs 7, and a limiting hole 17 is formed in the inner annular wall of the upper end of the hydraulic piston toothed ring 5 and matched with the limiting hole.
A clamping table 16 is arranged in an upper inner cavity of the middle section of the shell 1, and a high-pressure rubber plug 3 is placed on the upper part of the clamping table 16; more than one group of grooves 14 are uniformly distributed on the inner circumference of the middle section of the shell 1, and the sealing rings 4 are embedded in the grooves 14.
The invention relates to a hydraulic sealing patch connector suitable for a casing and an oil pipe, wherein a shell 1 is connected with a one-way valve 2 through threads. The high-pressure rubber plug 3 is an independent component and is put in from the upper part of the tool when the piston sealing mechanism needs to be started. The sealing ring 4 is embedded and fixed in a groove of the inner hole of the shell 1. The hydraulic piston ring gear 5 is fixed in the expanding piston cavity 13 of the shell 1. And the piston sealing ring 6 is embedded in a groove of the hydraulic piston tooth-shaped ring 5. The spring 7 is sleeved on the lock pin 8 and fixed in a lock pin fixing hole 15 in the shell 1. The guide 9 is screwed to the housing 1. The cutting insert 10 is welded to the shoe guide 9.
The invention comprises the steps of spiral introduction of a pipe end, finishing of a pipe end surface, sealing of a sealing ring and sealing of a hydraulic piston tooth-shaped ring. The spiral of the pipe end is introduced, the front end of the shoe guide 9 is processed into a spiral shape, and the end part of the pipe is stirred when the drilling machine drives the tool to rotate and put down, so that the end part of the pipe is wound into the conical surface of the tool. The end face of the pipe is trimmed, the pipe wound into the tapered surface of the tool is brought into contact with the cutting insert 10, and the end face of the broken irregularity is smoothed out to smoothly enter the inside of the tool. The sealing ring is sealed, the pipe is pushed into the position of the fixed end face of the tool, the sealing ring 4 adopts a combined structure with an O-shaped rubber ring embedded inside, and a large interference is generated to be sleeved outside the pipe for sealing. The hydraulic piston tooth-shaped ring is sealed, firstly, a high-pressure rubber plug 3 is put in, a pump is started to pump, the hydraulic piston tooth-shaped ring 5 is pushed to move forwards under the action of the conical surface of the lower part of a piston cavity of the shell 1 through the horizontal channel 12, the one-way valve 2 and the longitudinal channel 11, the tooth-shaped end part of the hydraulic piston tooth-shaped ring 5 is extruded and contracted, and the tooth-shaped ring is pressed into the outer wall of a sleeve or an oil pipe to play a role in fixing and sealing.
The invention relates to a driving mode of a hydraulic sealing patch connector suitable for a casing and an oil pipe, which comprises the following steps: the tool rotation is driven by the drill and the hydraulic pressure is driven by the liquid pump. The hydraulic piston tooth-shaped ring is provided with a piston sealing element with tooth shapes, and the number of the tooth shapes is 1-100; the hydraulic piston tooth-shaped ring is made of metal, metal-nonmetal composite material or nonmetal material. The locking mechanism of the hydraulic piston tooth-shaped ring is limited and locked by a spring lock pin.
Claims (5)
1. A hydraulic seal patch connector suitable for casing pipes and oil pipes is composed of a shell (1) and a shoe guide (9), wherein the lower end of the shell (1) is connected with the shoe guide (9) through threads, and is characterized in that the shell (1) is a cylindrical barrel, more than two groups of longitudinal channels (11) are uniformly distributed on the inner wall of the middle section of the shell (1), the top ends of the longitudinal channels (11) are communicated with the inner cavity of the shell (1) through horizontal channels (12), the tail ends of the longitudinal channels (11) are communicated with an expanding piston cavity (13) at the lower section of the shell (1), and a hydraulic piston tooth-shaped ring (5) is installed in the expanding piston cavity (13); the upper part of the longitudinal channel (11) is internally and spirally connected with a one-way valve (2), more than one group of grooves (14) are uniformly distributed on the inner circumference of the middle section of the shell (1), and first sealing rings (4) are embedded in the grooves (14); a cutting knife block (10) is fixedly arranged in the shoe guide (9); the end part of the sleeve or the oil pipe is spirally led in, the front end of the shoe guider (9) is processed into a spiral shape, and the drill drives the patch connector to rotate and the end part of the sleeve or the oil pipe is stirred when the patch connector is lowered so as to be wound on the lower conical surface of the shoe guider (9); the end face of the sleeve or the oil pipe is trimmed, the sleeve or the oil pipe which is wound on the lower conical surface of the shoe guiding device (9) contacts the cutting cutter block (10), and the end face with irregular fracture is flattened so as to smoothly enter the inside of the patching device; the sealing ring I (4) is used for sealing, the sleeve or the oil pipe is jacked into the fixed end face of the patching device, the sealing ring I (4) adopts a combined structure with an O-shaped rubber ring embedded inside, and the sealing ring I (4) generates large interference and is sleeved outside the sleeve or the oil pipe for sealing; the hydraulic piston tooth-shaped ring is sealed, firstly a high-pressure rubber plug (3) is put in, a pump is started to pump, the hydraulic piston tooth-shaped ring (5) is pushed to move forwards under the action of the conical surface of the lower part of an expanding piston cavity of the shell (1) through the horizontal channel (12), the one-way valve (2) and the longitudinal channel (11), the tooth-shaped end part of the hydraulic piston tooth-shaped ring (5) is extruded and contracted, and the tooth-shaped ring is pressed into the outer wall of a sleeve or an oil pipe so as to play a role in fixing and sealing.
2. The hydraulic seal patch device for casing and oil pipe according to claim 1, wherein the lower part of the middle section of the housing (1) is provided with an annular groove, the upper end of the hydraulic piston ring gear (5) is arranged in the groove, and piston sealing rings (6) are arranged on the inner and outer circumferences of the upper part of the hydraulic piston ring gear (5) and are in sealing connection with the connecting part of the upper end of the expanding piston cavity (13) through the piston sealing rings (6).
3. The hydraulic sealing patch device suitable for the casing and the oil pipe as claimed in claim 2, wherein the inner wall of the groove is provided with more than one group of lock pin fixing holes (15), the lock pin fixing holes (15) are internally provided with transverse lock pins (8), the lock pins (8) are sleeved with springs (7), and the inner annular wall of the upper end of the hydraulic piston gear-type ring (5) is provided with a limiting hole (17).
4. The hydraulic sealing patch device suitable for the casing and the oil pipe as claimed in claim 1 or 2, wherein a clamping table (16) is arranged in the upper cavity of the middle section of the housing (1), and a high-pressure rubber plug (3) is placed on the upper part of the clamping table (16).
5. A hydraulic seal patch for casing and tubing as claimed in claim 1 or 2 wherein the leading end of the shoe (9) is helical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747764.2A CN111894504B (en) | 2020-07-30 | 2020-07-30 | Hydraulic sealing patch connector suitable for casing and oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747764.2A CN111894504B (en) | 2020-07-30 | 2020-07-30 | Hydraulic sealing patch connector suitable for casing and oil pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111894504A CN111894504A (en) | 2020-11-06 |
| CN111894504B true CN111894504B (en) | 2022-04-08 |
Family
ID=73183451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010747764.2A Active CN111894504B (en) | 2020-07-30 | 2020-07-30 | Hydraulic sealing patch connector suitable for casing and oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111894504B (en) |
Citations (2)
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| CN201650179U (en) * | 2009-12-18 | 2010-11-24 | 贵州高峰石油机械股份有限公司 | Packer type sleeve repairing and connecting device with spiral slip |
| CN203559845U (en) * | 2013-11-07 | 2014-04-23 | 江苏君鑫谊石油机械有限公司 | Multifunctional casing joint patching device |
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| GB340292A (en) * | 1929-07-08 | 1931-01-08 | Doheny Stone Drill Co | Improvements in or relating to fishing tools for use in well drilling operations |
| US2659440A (en) * | 1950-12-04 | 1953-11-17 | Dean W Osmun | Casing repair tool |
| US3664423A (en) * | 1970-03-23 | 1972-05-23 | Gray Tool Co | Tie-back system for underwater completion |
| US3710864A (en) * | 1971-01-05 | 1973-01-16 | Dresser Ind | Well tubing tie back method and apparatus |
| US4660863A (en) * | 1985-07-24 | 1987-04-28 | A-Z International Tool Company | Casing patch seal |
| US4941691A (en) * | 1988-06-08 | 1990-07-17 | Dril-Quip, Inc. | Subsea wellhead equipment |
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- 2020-07-30 CN CN202010747764.2A patent/CN111894504B/en active Active
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|---|---|---|---|---|
| CN201650179U (en) * | 2009-12-18 | 2010-11-24 | 贵州高峰石油机械股份有限公司 | Packer type sleeve repairing and connecting device with spiral slip |
| CN203559845U (en) * | 2013-11-07 | 2014-04-23 | 江苏君鑫谊石油机械有限公司 | Multifunctional casing joint patching device |
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| Publication number | Publication date |
|---|---|
| CN111894504A (en) | 2020-11-06 |
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