CN110410031B - Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method - Google Patents
Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method Download PDFInfo
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- CN110410031B CN110410031B CN201910513745.0A CN201910513745A CN110410031B CN 110410031 B CN110410031 B CN 110410031B CN 201910513745 A CN201910513745 A CN 201910513745A CN 110410031 B CN110410031 B CN 110410031B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000005065 mining Methods 0.000 title claims description 13
- 238000003780 insertion Methods 0.000 claims abstract description 56
- 230000037431 insertion Effects 0.000 claims abstract description 56
- 239000003129 oil well Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 7
- 238000012261 overproduction Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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Classifications
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a casing damage well expansion pipe subsiding top back-inserting isolation production recovery process pipe column and a method. The process method not only retains the advantages of corrosion and leakage of the existing patching back-plugging and back-isolating production process in the large section of the oil field casing and the oil well re-production control of the upper water flowing back into the oil layer, but also simplifies the back-plugging and back-isolating production process, increases the flow passage of the insertion pipe, is convenient for the measure operation pipe column to pass through, and increases the applicability of the patching back-plugging and back-plugging process.
Description
Technical Field
The invention belongs to the technical field of oil field development casing damage well treatment, and particularly relates to a casing damage well expansion pipe patch top back-plugging isolated production and overproduction process pipe column and a method.
Background
Oil well is in operationThe produced liquid has high mineralization degree and contains Cl in the process of extraction-、CO2SRB and H2S, the internal corrosion is serious, the difference is large, the average corrosion rate is 0.5mm/a, and the local corrosion rate reaches 5 mm/a. The oil well with serious partial corrosion causes the perforation of a sleeve, and the large section of the inner wall is corroded and broken, so that the conventional mechanical isolation packer has no effective setting section, the effective period after isolation is short, and the effect of recovery is not good. The expansion pipe patch back-inserting isolation mining technology is a very effective means for casing damage well treatment, and aiming at an oil well with large-section corrosion and leakage of a casing, the back-inserting isolation mining technology does not need large-section patch, and can realize repair and permanent sealing of a leakage part of the corroded and leaked casing only by reconstructing a 'back-inserting sealing section' by using the expansion pipe patch, so that the construction risk and the treatment cost are prevented from being increased by times due to the expansion pipe large-section patch; the existing expansion pipe patching back-plugging isolating mining process adopts a process of presetting a back-plugging barrel at the bottom of an expansion pipe, so that an internal overflowing channel after treatment is small and easy to block, and oil pipe passing measures cannot be carried out in the later stage.
Disclosure of Invention
The invention aims to: aiming at the problems of the existing expansion pipe patching back-inserting and isolating recovery technology, the top back-inserting and isolating recovery overproduction process and method for the expansion pipe patching of the casing damage well are provided, and the problems that an internal flow passage of an existing expansion pipe patching isolating and extracting back-inserting mechanism is small, the blockage is easy, and the oil pipe passing measure operation cannot be carried out in the later stage are effectively solved.
The technical scheme adopted by the invention is as follows:
the utility model provides a casing damage well expansion pipe subsiding top back inserts separates to adopt and recovers recovery technology tubular column, comprises subsiding expansion pipe body and back insert mechanism two parts, back insert mechanism by the well completion back insert tubular column, tie-back intubate and tail pipe constitute, expansion pipe body inboard upper end is provided with back insert seal section, the tie-back intubate inserts back insert seal section, and tie-back intubate upper end and well completion back insert the tubular column and be connected, tie-back intubate lower extreme and tail pipe are connected.
EU oil pipe buckles are designed at the upper end and the lower end of the tie-back insertion pipe.
And the upper end of the tie-back insertion pipe is provided with a limiting spline for limiting after the tie-back insertion pipe is inserted into the expansion pipe body in place.
The internal diameter of the tieback cannula is the same as the internal diameter of the completion tieback string.
The process pipe column is arranged in an oil well casing.
The expansion pipe body and the oil well casing are sealed through a sealing rubber ring.
The tail pipe is formed by sequentially connecting part of tail pipes, a sieve pipe and a plug.
A casing damage well expansion pipe subsiding top back-inserting separate mining and production recovery process method comprises the steps that firstly, an expansion pipe body is lowered to a designed subsiding position through a construction pipe column, and is subsidized on a well wall through a sealing rubber ring after being expanded, and sealing pressure bearing can be achieved within a designed pressure range; and connecting the sealing insertion pipe with a well completion return insertion pipe column according to the design and then putting the sealing insertion pipe into the well until a limit spline of the return insertion pipe is propped against the upper edge of the expansion pipe body to ensure that the return insertion pipe is inserted into a return insertion sealing section on the inner side of the upper end of the expansion pipe body, then connecting a tail pipe at the lower end of the return insertion pipe, connecting a liquid inlet screen pipe below the tail pipe, connecting the tail pipe below the screen pipe, and connecting a plug at the lowest end of the tail pipe.
The invention has the following beneficial effects:
the invention provides a top back-inserting and isolating recovery treatment process for an expansion pipe patch, aiming at the problems that the prior expansion pipe patch back-inserting and isolating recovery process needs to preset a back-inserting pipe, so that a flow passage in the pipe is small and easy to block after treatment, and the measure operation of an oil pipe cannot be carried out in the later period.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic view of the expansion pipe patch top back-insert isolation mining process.
Description of reference numerals:
1. the well completion back-plugging pipe column comprises a well completion back-plugging pipe column 2, a back-plugging pipe 3, an expansion pipe body 4, a sealing rubber ring 5, an oil well casing pipe 6 and a tail pipe.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
example 1
As shown in fig. 1, a casing damage well expansion pipe subsiding top back-plug separate recovery and recovery technology tubular column comprises subsiding expansion pipe body 3 and back-plug mechanism two parts, back-plug mechanism comprises well completion back-plug tubular column 1, tie-back intubate 2 and tail pipe 6, 3 inboard upper ends of expansion pipe body are provided with back-plug seal section, through polishing and surface treatment before the inflation, are convenient for patch back intubate plug, guarantee male sealing performance, tie-back intubate 2 inserts tie-back seal section, just 2 upper ends of tie-back intubate are connected with well completion back-plug tubular column 1, and 2 lower extremes of tie-back intubate are connected with tail pipe 6.
The expansion pipe body 3 is arranged at the designed patching position through the construction pipe column, and is patched on the well wall by the sealing rubber ring 4 after expansion, so that sealing and pressure bearing can be realized within the designed pressure range. The lower end of the tie-back insertion pipe column 1 is connected with the tie-back insertion pipe 2 and inserted into the tie-back sealing section on the inner side of the upper end of the expansion pipe body 3, the lower end of the tie-back insertion pipe is connected with the tail pipe 6, when a pump needs to be checked and measures are operated, only the tie-back insertion pipe 2 (production pipe column) needs to be pulled out, and only an expansion pipe subsiding section is left in a shaft after the tie-back insertion pipe 2 is pulled out, so that the maximum drift diameter of the expansion pipe after subsiding can be kept, and the later-stage operation of measures for the expansion pipe aiming at a production layer is facilitated.
The process aims at the problems that the existing expansion pipe patching back-inserting and isolating production process needs to preset a back-inserting and inserting cylinder, so that an overflowing channel in an inserting pipe is small and easy to block after treatment, and oil pipe measurement operation cannot be carried out in the later period, and provides the expansion pipe patching top back-inserting and isolating production treatment process.
Example 2
On the basis of the embodiment 1, furthermore, EU tubing buckles are designed at the upper end and the lower end of the tie-back insertion pipe 2, the upper end is connected with the well completion tie-back insertion pipe column 1, the lower end is connected with the tail pipe 6, the lower end of the tail pipe is connected with the sieve pipe, the bottom of the sieve pipe is connected with other tail pipes according to specific well conditions, and the lowest end is connected with the plug.
Furthermore, the tie-back insertion pipe 2 is a large-diameter insertion pipe, the inner diameter of the tie-back insertion pipe 2 is the same as that of the completion tie-back insertion pipe column 1, and no necking is generated, so that smooth liquid outlet is ensured. The upper end of the tie-back insertion pipe 2 is provided with a limiting spline, and the tie-back insertion pipe 2 is limited after being inserted into the expansion pipe body 3 in place, so that the accuracy of the tie-back insertion is ensured.
The expansion pipe subsiding top back-inserting and separate-mining treatment process is mainly suitable for oil well re-production treatment of large-section corrosion leakage of an oil field casing and upper water backflow oil layer.
Example 3
A casing damage well expansion pipe subsidy top back-inserting separate mining and multiple production process method, at first go down expansion pipe body 3 to design subsidy position through the construction tubular column, depend on the seal rubber ring 4 to subsidy on the oil well casing 5 pipe wall after its expansion, can realize the sealed bearing within the design pressure range; and then connecting the sealing insertion pipe 2 with the well completion return insertion pipe column 1 according to the design and then putting the sealing insertion pipe 2 into the well until a limit spline of the return insertion pipe 2 is pressed against the upper edge of the expansion pipe body 3 to ensure that the return insertion pipe 2 is inserted into a return insertion sealing section on the inner side of the upper end of the expansion pipe body 3, then connecting 1 tail pipe 6 to the lower end of the return insertion pipe 2, connecting a liquid inlet sieve pipe to the lower end of the tail 6, connecting 1-3 tail pipes to the lower end of the sieve pipe, and only pulling out the return insertion pipe 2 when the bottom end of the tail pipe is connected with a plug and needs to inspect a pump and measure operation, and only leaving an expansion pipe supplementary section in the well shaft after pulling out the return insertion pipe 2, so that the maximum diameter of the expansion pipe after supplementary operation can be kept, and the later-stage operation of the expansion pipe measure can be performed on a production layer.
Example 4
The working principle and the working process of the casing damage well expansion pipe subsiding top back-inserting and separate mining production recovery process are as follows:
when in construction, firstly, the expansion pipe patching device is connected with a patching pipe column according to the design requirement and is put into a preset position in a well, steel balls are put into the patching pipe column, then the expansion head is pressed to push the expansion head to move upwards to cold extrude the expansion pipe to expand and patch the expansion pipe for molding, the expansion pipe is anchored with the casing wall in a sealing way, the expansion pipe patch tubular column is taken out after patch, the expansion pipe patch bottom plug is fished out by the lower slider fishing spear at one time, the maximum drift diameter of the expansion pipe is ensured, then the sealed inserting pipe 2 is connected with the well completion back inserting pipe column 1 according to the design and then is put into the well until the limit spline of the back inserting pipe 3 is pressed against the upper edge of the expansion pipe body 3, the sealing section of the back inserting pipe 2 is ensured to be completely inserted into the expansion pipe body 3 and oppositely inserted with the back inserting sealing section at the inner side of the upper end of the expansion pipe body 3 in the well, and then 2-3 t of pressure is added to prevent the tie-back insertion pipe 2 from dropping out of the expansion pipe body 3 caused by the creeping of the production pipe column in the later stage, so that the tight packing and the isolation mining are disabled. When the tieback insertion pipe 2 finishes the tieback insertion, the upper oil sleeve annulus is separated from the oil layer, and water broken by the upper stratum sleeve can only be stored in the oil sleeve annulus and is not communicated with the oil layer any more, so that the productivity of the oil well can be effectively exerted.
When the tieback pipe 2 is inserted back, the lower end of the tieback pipe 2 is connected with 1 tail pipe 6, the lower end of the tail pipe is connected with a liquid inlet sieve pipe, the lower end of the sieve pipe is connected with 1-3 tail pipes, and the lowest end of the tail pipe is connected with a plug.
If the oil well needs to inspect the pump or measure operation, the expansion pipe body 3 does not need to be salvaged or processed, the tieback insertion pipe 2 only needs to be pulled out to pull out the production pipe column, the pump inspection is completed, the insertion pipe sealing element is checked and maintained and then is put into the well again to be inserted and sealed, and the separate production is continued.
According to the top back-cut and separate-mining compound production process, the maximum drift diameter of the shaft after the expansion pipe is subsidized can be ensured only by pulling out the back-cut insertion pipe 2, so that the measure operation oil pipe can pass through smoothly, and the applicability of the process is improved.
Claims (7)
1. A casing damage well expansion pipe subsiding top back-inserting and separate mining production recovery process method is characterized by comprising the following steps: the expansion pipe body (3) is lowered to a designed patching position through a construction pipe column, and is patched on the pipe wall of the oil well casing (5) by virtue of the sealing rubber ring (4) after being expanded, so that sealing and pressure bearing can be realized within a designed pressure range; and then connecting the tie-back insertion pipe (2) with the well completion tie-back pipe string (1) according to the design and then putting the tie-back insertion pipe (2) into the well until the limit spline of the tie-back insertion pipe (2) is pressed against the upper edge of the expansion pipe body (3) to ensure that the tie-back insertion pipe (2) is inserted into the tie-back sealing section on the inner side of the upper end of the expansion pipe body (3), then connecting 1 tail pipe (6) at the lower end of the tie-back insertion pipe (2), connecting a liquid inlet screen pipe below the tail pipe (6), connecting 1-3 tail pipes below the screen pipe, connecting a plug at the lowest end of the tail pipe, when needing pump inspection and measure operation, only needing to pull out the tie-back insertion pipe (2), and only leaving an expansion pipe patch section in the well shaft after pulling out the tie-back insertion pipe (2), so as to keep the maximum path after the expansion pipe patch, and facilitate later-stage expansion pipe measure operation aiming at a production layer.
2. The casing damage well expansion pipe subsiding top back-inserting and production-isolating production recovery process method according to claim 1, further comprising a casing damage well expansion pipe subsiding top back-inserting and production-isolating production recovery process pipe column, wherein the process method is realized by the casing damage well expansion pipe subsiding top back-inserting and production-isolating production recovery process pipe column, and is characterized in that: the technical pipe column consists of an expansion pipe body (3) and a back-plugging mechanism, wherein the back-plugging mechanism consists of a well completion back-plugging pipe column (1), a back-plugging insertion pipe (2) and a tail pipe (6), the upper end of the inner side of the expansion pipe body (3) is provided with a back-plugging sealing section, the back-plugging insertion pipe (2) is inserted into the back-plugging sealing section, the upper end of the back-plugging insertion pipe (2) is connected with the well completion back-plugging pipe column (1), and the lower end of the back-plugging insertion pipe (2) is connected with the tail pipe (6).
3. The casing damage well expansion pipe subsiding top back-plugging alternate production recovery and overproduction process method according to claim 2, characterized in that: EU oil pipe buckles are designed at the upper end and the lower end of the tie-back insertion pipe (2).
4. The casing damage well expansion pipe subsiding top back-plugging alternate production recovery and overproduction process method according to claim 2, characterized in that: the upper end of the tie-back insertion pipe (2) is provided with a limiting spline and is used for limiting after the tie-back insertion pipe (2) is inserted into the expansion pipe body (3) in place.
5. The casing damage well expansion pipe subsiding top back-plugging alternate production recovery and overproduction process method according to claim 2, characterized in that: the inner diameter of the tie-back insertion pipe (2) is the same as that of the well completion tie-back insertion pipe string (1).
6. The casing damage well expansion pipe subsiding top back-plugging alternate production recovery and overproduction process method according to claim 2, characterized in that: the process string is placed inside an oil well casing (5).
7. The casing damage well expansion pipe subsiding top back-plugging alternate production recovery and overproduction process method according to claim 6, which is characterized in that: the expansion pipe body (3) and the oil well casing pipe (5) are sealed through a sealing rubber ring (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910513745.0A CN110410031B (en) | 2019-06-14 | 2019-06-14 | Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910513745.0A CN110410031B (en) | 2019-06-14 | 2019-06-14 | Casing damage well expansion pipe patching top back-plugging separate-mining production-recovery complex production process pipe column and method |
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| Publication Number | Publication Date |
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| CN110410031A CN110410031A (en) | 2019-11-05 |
| CN110410031B true CN110410031B (en) | 2021-09-28 |
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| CN114482894B (en) * | 2020-10-27 | 2024-03-01 | 中国石油化工股份有限公司 | Hydraulic forming and repairing system for well screen pipe and construction method thereof |
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| CN110410031A (en) | 2019-11-05 |
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