CN201428405Y - Patch device for casing damaged well - Google Patents
Patch device for casing damaged well Download PDFInfo
- Publication number
- CN201428405Y CN201428405Y CN2009200200163U CN200920020016U CN201428405Y CN 201428405 Y CN201428405 Y CN 201428405Y CN 2009200200163 U CN2009200200163 U CN 2009200200163U CN 200920020016 U CN200920020016 U CN 200920020016U CN 201428405 Y CN201428405 Y CN 201428405Y
- Authority
- CN
- China
- Prior art keywords
- expansion
- casing
- expansion pipe
- pipe
- damaged well
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005482 strain hardening Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012913 prioritisation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 208000034189 Sclerosis Diseases 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
- 238000005553 drilling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a patch device for a casing damaged well, which comprises an oil pipe and an expansion pipe. One end of the oil pipe is inserted into the expansion pipe through the upperend of the expansion pipe. The end of the oil pipe in the expansion pipe is fixedly connected with a connecting shaft. The lower end of the connecting shaft is connected with an expansion cone. A through hole is arranged on the connecting shaft. The lower end of the expansion pipe is fixedly connected with a screwed plug. After the casing damaged well is repaired, the expansion pipe is outward expanded along the radial direction and is closely attached onto the inner wall of a sound casing above and below a casing damaged section and no other sealed hanging tools are required after the expansion pipe is sealed. Thereby, the radial occupied size of the casing is reduced so that the repaired casing can obtain a large drift diameter. After the expansion of the expansion pipe and under the effect of cold-work hardening, the strength and the rigidity of the expansion pipe are greatly improved, the mechanical properties of the expansion pipe after the expansion and the deformation are greatly improved and the repaired position of the casing of the casing damaged well has the strong capacity of resisting internal pressure and external pressure.
Description
Technical field
The utility model relates in a kind of oil exploitation process the maintenance of equipment of drilling well, relates to a kind of casing damaged well subsidy device specifically.
Background technology
At present, the One's name is legion of China's casing damaged well, become one of great difficult problem that influences oil production rate, the damage distortion of casing damaged well middle sleeve directly influences the ordinary production of oil-water well, even can cause oil-water well to stop production, and the serious oil-water well that can make is scrapped, prolongation along with the oilfield exploitation time, Casing Failure deformed damaged phenomenon is on the rise, and therefore, the repair that the casing damaged well sleeve pipe damages has become an important topic in the oilfield development process.
For improving the utilization rate of oil-water well, increase the output of oil, need repair the sleeve pipe of casing damaged well, when repairing, need analyze the damage and the distortion of sleeve pipe, thereby determine to cause the reason of sleeve pipe damage and the type of damage, take targetedly technology that sleeve pipe is repaired then, oil-water well is returned to normal production.
The type that sleeve pipe damages is broadly divided into four kinds: be out of shape, break, bad break and corrosion failure, for many years, carried out a series of research at the types of damage of above four kinds of sleeve pipes, adopted several different methods that the sleeve pipe of casing damaged well is repaired, because the reparation difficulty of casing damaged well sleeve pipe is big, so the repairing effect to the casing damaged well sleeve pipe is unsatisfactory, casing damaged well run through casing size after the reparation reduces, sealing is poor, anti-pressure ability is more weak, use an end can go wrong again after the time, need repair again, increased cost of production.
The utility model content
Problem to be solved in the utility model is at above problem, provides and can obtain bigger latus rectum, good airproof performance, casing damaged well subsidy device that anti-pressure ability is strong after a kind of casing damaged well reparation.
For addressing the above problem, the technical scheme that the utility model adopted is: casing damaged well subsidy device, comprise oil pipe and expansion tube, one end of described oil pipe is inserted in the expansion tube from the upper end of expansion tube, the end that described oil pipe is positioned at expansion tube is fixedly connected with connecting axle, described connecting axle lower end is connected with expansion cone, and described connecting axle is provided with through hole, and the lower end of described expansion tube is fixedly connected with plug.
A kind of concrete prioritization scheme, the excircle of described connecting axle lower end is provided with jump ring.
A kind of concrete prioritization scheme, described connecting axle is provided with spacing ring.
A kind of concrete prioritization scheme, the upper end of described expansion tube is provided with fairlead.
A kind of concrete prioritization scheme, described oil pipe upper end is provided with joint.
The utility model is taked above technical scheme, have the following advantages: after casing damaged well is repaired, expansion tube radially outwards expands, be close to cover and decrease section up and down on the inwall of intact sleeve pipe, good airproof performance, and no longer need other sealed suspension instruments, thereby reduced taking of sleeve pipe radial dimension, make the sleeve pipe after the reparation can obtain bigger latus rectum, after expansion tube expands, under the cold effect of doing sclerosis, the intensity of expansion tube and rigidity are largely increased, thereby the mechanical performance after the expansion tube dilatancy is significantly improved, make the repair place of casing damaged well sleeve pipe have the ability of very strong anti-interior external pressure.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is the structural representation of casing damaged well subsidy device among the utility model embodiment.
Among the figure: the 1-joint; 2-connects hoop; The 3-oil pipe; The 4-fairlead; The 5-expansion tube; The 6-back-up ring; The 7-O RunddichtringO; The 8-protective sleeve; The 9-connecting axle; The 10-hexagon socket head cap screw; The 11-expansion cone; The 12-jump ring; 13-jump ring annular groove; The 14-plug; The 15-through hole; The 16-spacing ring.
The specific embodiment
Embodiment: as shown in drawings, casing damaged well subsidy device, comprise oil pipe 3 and expansion tube 5, oil pipe 3 two ends are respectively arranged with conical external screw thread, one end of oil pipe 3 is inserted in the expansion tube 5 from the upper end of expansion tube 5, the other end of oil pipe 3 is positioned at the outside of expansion tube 5, oil pipe 3 is positioned at the outer end of expansion tube 5 by connecting hoop 2 joint 1 that has been threaded, the through hole that joint 1 is provided with connecting hole and is communicated with oil pipe 3, the threaded one end that oil pipe 3 is positioned at expansion tube 5 is connected with connecting axle 9, the lower end outer circumference surface of connecting axle 9 is provided with three seal grooves and two jump ring annular grooves 13, be provided with O RunddichtringO 7 in the seal groove, be provided with jump ring 12 in the jump ring annular groove 13, connecting axle 9 lower ends are connected with expansion cone 11 by jump ring 12, connecting axle 9 is provided with through hole 15, through hole 15 is communicated with oil pipe 3, expansion cone 11 is provided with axle center hole, the axle center hole of connecting axle 9 lower ends and expansion cone 11 is slidingly matched, expansion cone 11 axle center hole peripheries be provided with connecting axle 9 lower end outer circumference surfaces on jump ring annular groove 13 corresponding jump ring annular grooves, the lower end outer circumference surface of expansion cone 11 is provided with seal groove, be provided with O RunddichtringO 7 in the seal groove, the connecting axle 9 of expansion cone 11 upper ends is provided with spacing ring 16, and spacing ring 16 is fixedlyed connected with connecting axle 9 by two hexagon socket head cap screws 10.
The lower end screw thread of expansion tube 5 is connected with plug 14; the excircle of plug 14 upper ends is provided with two seal grooves; be provided with O RunddichtringO 7 in the seal groove; the upper end of expansion tube 5 is provided with fairlead 4; expansion tube 5 is divided into two sections; two sections expansion tubes 5 connect by taper thread, and the excircle of junction is provided with protective sleeve 8, and the junction is provided with back-up ring 6 and O RunddichtringO 7.
In use, expansion cone 11 is installed in the lower end of expansion tube 5, realize sealing between expansion cone 11 and the expansion tube 5 by being arranged on O RunddichtringO 7 on expansion cone 11 outer circumference surfaces, then plug 14 is fixedly connected on the lower end of expansion tube 5, the sealing that O RunddichtringO 7 by being arranged on plug 14 upper ends is realized between plugs 14 and the expansion tube 5, with oil pipe 3 and connecting axle 9 by being threaded togather, then oil pipe 3 is put into downwards in expansion tube 5 tubing strings together with connecting axle 9, when the lower end of connecting axle 9 enters the axle center hole of expansion cone 5, jump ring 12 is squeezed and inwardly shrinks, when the jump ring annular groove on the jump ring 12 arrival expansion cone 11, jump ring 12 outwards opens, be embedded in the jump ring annular groove in the expansion cone 11, connecting axle 9 and expansion cone 11 are linked together, because connecting axle 9 lower ends are provided with three O RunddichtringOs 7, thereby have realized the sealing between expansion cone 11 and the connecting axle 9.
When carrying out the reparation of casing damaged well, at first the casing damaged well sleeve pipe is damaged section and carry out shaping or milling processing, the sleeve pipe of expansion tube 5 tubing strings being reinforced down to the need subsidy by oil pipe 3 damages section then, the hydraulic pressure high-pressure pump is linked to each other with joint 1, suppress in oil pipe 3 with the hydraulic pressure high-pressure pump, because expansion tube 5 lower ends are by plug 14 sealings, so, after reaching certain pressure, it is up that expansion cone 11 promotes oil pipe 3, and when expansion cone 11 went upward to expansion tube 5 upper ends, oil pipe 3 was communicated with sleeve pipe, pump pressure descends, expansion tube 11 is finished overall radial and is expanded, and is close on the inwall of intact sleeve pipe, then oil pipe 3 and expansion cone 11 is extracted out, drill through the plug 14 of expansion tube 11 lower ends, finish the reparation that the casing damaged well sleeve pipe is damaged section.
Claims (5)
1, casing damaged well subsidy device, comprise oil pipe (3) and expansion tube (5), it is characterized in that: an end of described oil pipe (3) is inserted in the expansion tube (5) from the upper end of expansion tube (5), the end that described oil pipe (3) is positioned at expansion tube (5) is fixedly connected with connecting axle (9), described connecting axle (9) lower end is connected with expansion cone (11), described connecting axle (9) is provided with through hole (15), and the lower end of described expansion tube (5) is fixedly connected with plug (14).
2, casing damaged well subsidy device as claimed in claim 1, it is characterized in that: the excircle of described connecting axle (9) lower end is provided with jump ring (12).
3, casing damaged well subsidy device as claimed in claim 1, it is characterized in that: described connecting axle (9) is provided with spacing ring (16).
4, casing damaged well subsidy device as claimed in claim 1, it is characterized in that: the upper end of described expansion tube (5) is provided with fairlead (4).
5, casing damaged well subsidy device as claimed in claim 1, it is characterized in that: described oil pipe (3) upper end is provided with joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200200163U CN201428405Y (en) | 2009-03-31 | 2009-03-31 | Patch device for casing damaged well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200200163U CN201428405Y (en) | 2009-03-31 | 2009-03-31 | Patch device for casing damaged well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428405Y true CN201428405Y (en) | 2010-03-24 |
Family
ID=42032140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200200163U Expired - Fee Related CN201428405Y (en) | 2009-03-31 | 2009-03-31 | Patch device for casing damaged well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428405Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2459927C1 (en) * | 2011-03-18 | 2012-08-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method and device for supporting incompetent rocks at extended areas of well bores |
| CN106285540A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气股份有限公司 | Coalbed Gas Well Casing Repair Method |
| CN108119068A (en) * | 2016-12-14 | 2018-06-05 | 中国石油天然气股份有限公司 | Construction method and process string for preventing casing damage |
| WO2023124754A1 (en) * | 2021-12-31 | 2023-07-06 | 中国石油天然气集团有限公司 | Non-welding repair method for coiled tubing |
-
2009
- 2009-03-31 CN CN2009200200163U patent/CN201428405Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2459927C1 (en) * | 2011-03-18 | 2012-08-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method and device for supporting incompetent rocks at extended areas of well bores |
| CN106285540A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气股份有限公司 | Coalbed Gas Well Casing Repair Method |
| CN108119068A (en) * | 2016-12-14 | 2018-06-05 | 中国石油天然气股份有限公司 | Construction method and process string for preventing casing damage |
| CN108119068B (en) * | 2016-12-14 | 2020-02-14 | 中国石油天然气股份有限公司 | Construction method and process pipe column for preventing casing damage |
| WO2023124754A1 (en) * | 2021-12-31 | 2023-07-06 | 中国石油天然气集团有限公司 | Non-welding repair method for coiled tubing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202788725U (en) | Metal hard sealing oil tube head | |
| CN202990942U (en) | Double-seal Christmas tree for conveniently mounting coiled tubing | |
| CN101942979A (en) | Anchoring ball type casing truing unit and truing method thereof | |
| CN201428405Y (en) | Patch device for casing damaged well | |
| CN103470203A (en) | Velocity string hanger of coiled tubing and hanging method thereof | |
| CN203114241U (en) | Fracturing bridge plug | |
| CN202391370U (en) | High temperature resistant expansion tubular column for oil drilling | |
| CN201705258U (en) | The elastic claws of the expansion pipe can be used to remove the bottom plug | |
| CN102041974B (en) | Bypass short-circuit structure of abandoned deep water well cutting device and cementing plug method thereof | |
| CN201705216U (en) | Circlip type fishable bottom plug for expansion pipe | |
| CN201730574U (en) | Wellhead device oil pipe hanging metal sealing device | |
| CN204960825U (en) | Hydraulic pressure release sub | |
| CN202544789U (en) | While-drilling jar | |
| CN101210485A (en) | Design method of expansion sleeve for oil field | |
| CN202348193U (en) | Radius-variable expansion tool for sleeve damage of oil-gas well | |
| CN201407009Y (en) | Hydraulic packer | |
| CN107917306A (en) | Water pipe rapid movable connector | |
| CN211287585U (en) | Hydraulic shaping device | |
| CN202249889U (en) | Auxiliary sealing device for casing hanger | |
| CN201730553U (en) | Expansion pipe column for petroleum drill | |
| CN206625815U (en) | A kind of anti-leak thermal extraction casing head | |
| CN203742545U (en) | Combined drill pipe rubber plug | |
| CN201095968Y (en) | Slips type casing tube buckle connected simple casing head | |
| CN201778757U (en) | Internal production tree cap of subsea production tree | |
| CN201428386Y (en) | Expansion string for casing damaged well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20110331 |