CN2813877Y - Oil-gas well casing repairing device - Google Patents
Oil-gas well casing repairing device Download PDFInfo
- Publication number
- CN2813877Y CN2813877Y CN 200520079318 CN200520079318U CN2813877Y CN 2813877 Y CN2813877 Y CN 2813877Y CN 200520079318 CN200520079318 CN 200520079318 CN 200520079318 U CN200520079318 U CN 200520079318U CN 2813877 Y CN2813877 Y CN 2813877Y
- Authority
- CN
- China
- Prior art keywords
- pipe
- subsidy
- external diameter
- grappling
- tubing string
- 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 - Lifetime
Links
- 210000002445 nipple Anatomy 0.000 claims abstract description 44
- 239000002360 explosive Substances 0.000 claims abstract description 12
- 241001247986 Calotropis procera Species 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 3
- 230000001771 impaired effect Effects 0.000 abstract description 7
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003672 gas field water Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to oil gas well well workover technology field, particularly relates to utilizing the subsidy pipe the impaired sleeve pipe of oil gas well to be subsidized a kind of oil gas casing subsidy device of reinforcing.It is characterized in that: the two ends up and down of subsidy pipe connect the grappling pipe nipple, fixedly connected with pallet in the tubing string lower end, centralizer is arranged on the tubing string, and subsidy tubing string and grappling pipe nipple are enclosed within the tubing string outside and are sitting in then on the pallet, and pipeline section outside corresponding with the grappling pipe nipple on the tubing string is attached with explosive.It implements simple, subsidizes back intensity height, and the grappling of subsidy pipe is firm, and subsidy is managed and by good sealing effect between casing repairing, subsidy back borehole diameter is big.
Description
Technical field
The utility model relates to oil gas well well workover technology field, particularly relates to utilizing the subsidy pipe the impaired sleeve pipe of oil gas well to be subsidized the oil gas casing subsidy device of reinforcing.
Background technology
After petroleum and natural gas well or oil gas field water injection well bore, can in well, be lowered to one deck steel production casing, all afterwards production operations are just carried out in the steel casing string, after after a while, can damage problem owing to casing string takes place a variety of causes, such as the corrosion of casing string, at this moment, need repair the damaged location of casing string, reinforcing the layer of metal bushing pipe at the damaged position of production casing is one of main repairing means of current employing.Bushing pipe is lowered to after the well, need fix it, or claim grappling, makes it can not take place vertically to move freely or come off.At present, known casing patching method mainly contains: (1) common bushing pipe subsidy, and lean on the weight of bushing pipe to set on the packer or the shaft bottom, this subsidy often grappling is unreliable with sealing, and the reduction of the well diameter reduction after subsidy amplitude is bigger; (2) bellows, smear epobond epoxyn in the bellows outside, push bellows then it is bonded on the internal surface of sleeve pipe that needs the shutoff subsidy, this method is because the bellows wall ratio is thinner, so subsidy back strength ratio is lower, and come off easily at the phase inner corrugated pipe of being on active service in the future; (3) small casing reparation is lowered at 4 o'clock in well or 3.5 o'clock oil pipes are repaired, and the borehole diameter reduction amplitude after this method is repaired is bigger.Good subsidy device should possess following 5 features: the one, and subsidy pipe intensity height; The 2nd, the grappling of subsidy pipe is firm; The 3rd, subsidize pipe and had the sealing that meets the demands between casing repairing; The 4th, subsidy back borehole diameter is big; The 5th, can disposable repairing random length well section.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes existing casing damaged well subsidy method, and a kind of oil gas casing subsidy device is provided, and it implements simple, subsidy back intensity height, the grappling of subsidy pipe is firm, and subsidy is managed and by good sealing effect between casing repairing, subsidy back borehole diameter is big.
The technical solution of the utility model is achieved in that a kind of oil gas casing subsidy of design device, it is characterized in that: the two ends up and down of subsidy pipe connect the grappling pipe nipple, fixedly connected with pallet in the tubing string lower end, centralizer is arranged on the tubing string, subsidy tubing string and grappling pipe nipple are enclosed within the tubing string outside and are sitting in then on the pallet, and pipeline section outside corresponding with the grappling pipe nipple on the tubing string is attached with explosive.
Described subsidy pipe is a steel pipe, and its external diameter is than the little 3～8mm of internal diameter that waits to repair well, and its wall thickness is 6.5～8mm, and subsidy pipe is connected by casing joint with subsidizing between the pipe.
Described grappling pipe nipple is made of two sections different pipes of external diameter, the external diameter of the section of a pipe that external diameter is bigger is identical with the subsidy external diameter of pipe, there is screw thread the end, can be connected with the subsidy pipe, the external diameter of the section of a pipe that external diameter is less is than the little 4～10mm of external diameter of external diameter big the last period of pipe, length 0.5～2m, the wall thickness of whole grappling pipe nipple is identical with the subsidy pipe, the less section of a pipe outside of external diameter has rubber bush, and the wall thickness of sleeve is L5～3.5mm, and length is 50～500mm.
The external diameter of described centralizer is than the little 3～6mm of subsidy bore.
Described pallet is the metal material cake, and its external diameter is than the big 1～2mm of external diameter of grappling pipe nipple undergauge section, and the lower end is taper.
Described grappling pipe nipple is the grappling pipe nipple that yielding steel are made.
Characteristics of the present utility model are: implementation method is simple; The subsidy thickness of pipe wall is big, subsidy back intensity height; The grappling of subsidy pipe is firm; Subsidy pipe and by good sealing effect between casing repairing; Thereby the subsidy pipe can be by being threaded to the repairing that random length realizes length well section; Subsidy pipe and little by gap between casing repairing, subsidy back borehole diameter is big; The borehole depth of anchor station can arbitrarily be controlled.
Working method of the present utility model is: will install down to predetermined borehole depth by oil pipe, to manage the corresponding explosive initiation of lower end grappling pipe nipple with subsidy on the oil pipe from ground by cable then, energy behind the explosive charge is opened the tube reducing pipeline section expansion of grappling pipe nipple, it is outer by casing repairing that it is affixed on, the outer rubber tube of grappling pipe nipple is anchored pipe nipple and is compressed by casing repairing, thereby the very big frictional resistance of generation at subsidy pipe and rubber tube and rubber tube and between by two contact surfaces of casing repairing, make the subsidy pipe can't landing, produce good sealing simultaneously at the rubber tube position.To subsidize the grappling pipe nipple expansion of managing the upper end by same method again opens and grappling.Then oil pipe and pallet are got final product from subsidizing to extract in the pipe.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
Fig. 1 is a kind of better embodiment structure chart of oil gas casing subsidy device of the present utility model.
Fig. 2 is the well schematic diagram after the subsidy of subsidy pipe.
Among the figure: 1, rubber bush; 2, following grappling pipe nipple; 3, joint; 4, centralizer; 5, tubing string; 6, subsidized the damaged location of sleeve pipe; 7, joint; 8, go up the grappling pipe nipple; 9, explosive; 10, rubber bush; 11, the impaired production casing of being subsidized; 12, centralizer; 13, subsidy pipe; 14, joint; 15, subsidy pipe; 16, explosive; 17, pallet.
The specific embodiment
As shown in Figure 1, the device combining structure is, tubing string 5 is fixedlyed connected with pallet 17, following grappling pipe nipple 2 is connected with subsidy pipe 15 by joint 3, subsidy pipe 15 is connected with subsidy pipe 13 by joint 14, continue to connect the subsidy pipe above the subsidy pipe 13, the length that the quantity of connected subsidy pipe is subsidized is as required determined, about the length about 20m of the total length after the subsidy pipe connects greater than the damaged location 6 of being subsidized sleeve pipe, subsidy pipe topmost is connected with last grappling pipe nipple 8, then whole subsidy tubing string is enclosed within the outside of tubing string 5 and is sitting on the pallet 17, the pipeline section that tubing string 5 is corresponding with bottom subsidy pipe is equipped with centralizer 4, the pipeline section corresponding with subsidy pipe topmost is equipped with centralizer 12, tubing string 5 is attached with explosive 9 with last grappling pipe nipple 8 corresponding pipeline section outsides, be attached with explosive 16 with following grappling pipe nipple 2 corresponding pipeline section outsides, explosive 9 and explosive 16 are connected with the ground firing switch by cable.Subsidy pipe 13 and subsidy pipe 15 are identical, adopt common steel pipe, and its strength grade is determined according to the demand of the well of being repaired, its external diameter is than the little 3～8mm of internal diameter that waits to repair well, its wall thickness is 6.5～8mm, and two ends are processed with screw thread, and the subsidy pipe is connected to each other.Last grappling pipe nipple 8 adopts yielding steel to make, its strength grade is suitable with subsidy pipe 13 and subsidy pipe 15, wall thickness is consistent with subsidy pipe 13 and subsidy pipe 15, last grappling pipe nipple 8 is made of two sections different pipes of external diameter, the external diameter of the section of a pipe that external diameter is bigger is identical with subsidy pipe 13 and subsidy pipe 15 external diameters, the end is threaded, can be connected by joint 7 with subsidy pipe 13 and subsidy pipe 15, the little about 4～10mm of the external diameter of the section of a pipe that the external diameter of the section of a pipe that external diameter is less is bigger than external diameter, about 0.5～the 2m of length, the pipe of this structure can be made by the method for tube reducing drawing.The wall thickness of whole upward grappling pipe nipple 8 is identical with the subsidy pipe, is made by yielding steel.Following grappling pipe nipple 2 external diameters have rubber bush 10 than the outside of segment, and the wall thickness of rubber bush 10 is about 1.5～3.5mm, and length is 50～500mm.The structure of following grappling pipe nipple 2 and material are identical with last grappling pipe nipple 8, and the outside has rubber bush 1, and rubber bush 1 is identical with rubber bush 10.The superstructure of pallet 17 is a round pie, the big 1～2mm of external diameter of the section of a pipe that its external diameter is more less than the external diameter of grappling pipe nipple 2, and the lower end of pallet 17 is taper, and this structure makes it be easy to be lowered to well, and pallet 17 adopts metal material to make.The external diameter of centralizer 4 its role is to make tubing string 5 and the dead in line of subsidizing tubing string than the little 3～6mm of subsidy bore, so that tubing string 5 occupy the axis centre of subsidy pipe 15, the size of centralizer 12 and effect are identical with centralizer 4.By tubing string 5 whole subsidy device is lowered to the desired depth of well during operation, make the top of subsidy tubing string and exceed bottom the impaired production casing 11 of being subsidized damaged location 6 each be not less than about 10m approximately so that down grappling pipe nipple 2 and on the outer wall of grappling pipe nipple 8 corresponding to intact production casing section.Ignition charge 16 then, energy after explosive 16 blasts will descend the less section of a pipe of external diameter of grappling pipe nipple 2 to expand and open, make it be close to outer production casing, and will descend grappling pipe nipple 2 outer rubber bushs 1 to be pressed on down between grappling pipe nipple 2 and the quilt impaired production casing 11 of subsidizing, producing very big frictional resistance between two contact surfaces between grappling pipe nipple 2 and rubber bush 1 and rubber bush 1 and the quilt impaired production casing 11 of subsidizing down like this, the subsidy tubing string is realized the lower end grappling, subsidizing pipe 15 and produced sealing between the impaired production casing 11 of subsidizing simultaneously.Next ignition charge 9, use the same method, and will go up 8 grapplings of grappling pipe nipple.Thereby make the subsidy tubing string to being played the subsidy effect by the damaged location 6 of subsidy sleeve pipe.At last ground is proposed for tubing string 5 and pallet 17.
Claims (6)
1, oil gas casing subsidy device, it is characterized in that: the two ends up and down of subsidy pipe connect the grappling pipe nipple, fixedly connected with pallet in the tubing string lower end, centralizer is arranged on the tubing string, subsidy tubing string and grappling pipe nipple are enclosed within the tubing string outside and are sitting in then on the pallet, and pipeline section outside corresponding with the grappling pipe nipple on the tubing string is attached with explosive.
2, oil gas casing according to claim 1 subsidy device, it is characterized in that: described subsidy pipe is a steel pipe, and its external diameter is than the little 3～8mm of internal diameter that waits to repair well, and its wall thickness is 6.5～8mm, and the subsidy pipe is connected by casing joint with subsidizing between the pipe.
3, oil gas casing subsidy device according to claim 1, it is characterized in that: described grappling pipe nipple is made of two sections different pipes of external diameter, the external diameter of the section of a pipe that external diameter is bigger is identical with the subsidy external diameter of pipe, there is screw thread the end, can be connected with the subsidy pipe, little 4～the 10mm of external diameter of the section of a pipe that the external diameter of the section of a pipe that external diameter is less is bigger than external diameter, length 0.5～2m, the wall thickness of whole grappling pipe nipple is identical with the subsidy pipe, the less section of a pipe outside of external diameter has rubber bush, the wall thickness of sleeve is 1.5～3.5mm, and length is 50～500mm.
4, oil gas casing subsidy device according to claim 1, it is characterized in that: the external diameter of described centralizer is than the little 3～6mm of subsidy bore.
5, oil gas casing subsidy device according to claim 1, it is characterized in that: described pallet is the metal material cake, and its external diameter is than the big 1～2mm of external diameter of grappling pipe nipple undergauge section, and the lower end is taper.
6, oil gas casing subsidy device according to claim 1, it is characterized in that: described grappling pipe nipple is the grappling pipe nipple that yielding steel are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079318 CN2813877Y (en) | 2005-08-21 | 2005-08-21 | Oil-gas well casing repairing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079318 CN2813877Y (en) | 2005-08-21 | 2005-08-21 | Oil-gas well casing repairing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2813877Y true CN2813877Y (en) | 2006-09-06 |
Family
ID=36948962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520079318 Expired - Lifetime CN2813877Y (en) | 2005-08-21 | 2005-08-21 | Oil-gas well casing repairing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2813877Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453763A (en) * | 2014-12-11 | 2015-03-25 | 北方斯伦贝谢油田技术（西安）有限公司 | Sealing anchoring member for casing patching and mounting device thereof |
| CN109630051A (en) * | 2018-03-12 | 2019-04-16 | 刘屹凡 | A kind of petroleum casing pipe chemical method prosthetic device |
| CN110410031A (en) * | 2019-06-14 | 2019-11-05 | 中国石油天然气股份有限公司 | Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method |
-
2005
- 2005-08-21 CN CN 200520079318 patent/CN2813877Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453763A (en) * | 2014-12-11 | 2015-03-25 | 北方斯伦贝谢油田技术（西安）有限公司 | Sealing anchoring member for casing patching and mounting device thereof |
| CN109630051A (en) * | 2018-03-12 | 2019-04-16 | 刘屹凡 | A kind of petroleum casing pipe chemical method prosthetic device |
| CN110410031A (en) * | 2019-06-14 | 2019-11-05 | 中国石油天然气股份有限公司 | Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090109 Address after: Shaanxi province Xi'an Weiyang Weiyang Road No. 151 in Changqing Garden District headquarters Changqing engineering technology and the Ministry of science and technology, zip code: 710021 Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: Department of science and technology, bureau of Exploration Bureau Changqing Changqing Garden District, Shaanxi, Xi'an 710021, China Patentee before: Changqing Petroleum Exploration Bureau |
|
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM GROUP CHUANQING DRILLING ENGINEERI Free format text: FORMER OWNER: CHANGQING PETROLEUM EXPLORATION BUREAU Effective date: 20090109 |
|
| CX01 | Expiry of patent term |
Expiration termination date: 20150821 Granted publication date: 20060906 |
|
| EXPY | Termination of patent right or utility model |