CN201148843Y - Releasing type water block pipe pillar capable of heat washing to protect oil layer - Google Patents
Releasing type water block pipe pillar capable of heat washing to protect oil layer Download PDFInfo
- Publication number
- CN201148843Y CN201148843Y CNU2007201872489U CN200720187248U CN201148843Y CN 201148843 Y CN201148843 Y CN 201148843Y CN U2007201872489 U CNU2007201872489 U CN U2007201872489U CN 200720187248 U CN200720187248 U CN 200720187248U CN 201148843 Y CN201148843 Y CN 201148843Y
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- oil
- packer
- oil pipe
- well
- column jacket
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Abstract
The utility model discloses a releasing type water-plugging column jacket which can be hot-washed and protect an oil layer, and relates to a water-plugging compound column jacket which is applied to protect the oil layer in an oil well during the hot washing process. The water-plugging compound column jacket comprises a releasing tie-in, packers, an inverted valve, and an oil pipe. The column jacket is characterized in that the lower end of the oil pipe is connected with the releasing tie-in, the lower end of which is connected with an upper packer; the lower end of the upper packer is connected with the oil pipe, and then the lower end of the oil pipe is connected with a lower packer the lower end of which is connected with the oil pipe; the lower end of the oil pipe is connected with the inverted valve; the upper packer is positioned at the upper part of an aqueous layer; the lower packer is positioned between the aqueous layer and the oil layer. The water-plugging compound column jacket has the effects that the column jacket is kept in the well without influencing a production column jacket; the aqueous layer can be plugged, the oil layer supplies oil to the production column jacket; when the well needs to be hot-washed, hot washing liquid or well killing fluid is obstructed by the packers and the inverted valve and does not enter into the oil layer to cause pollution, so that the purpose of protecting the oil layer is achieved.
Description
Technical field
The utility model relates to the protection oil reservoir tubing string under a kind of oil well.Being particularly related to a kind of releasing type water plugging string that can heat wash the protection oil reservoir, is a kind ofly can heat wash the protection oil reservoir, also is the tubing string of giving up of water blockoff simultaneously.
Background technology
For one be the oil field of main artificial lifting way with sucker rod pumping because casing programme is poor, pump is hung dark, sucker rod and tube inner wall wear and tear in the oil recovery manufacturing process; The oil well pump corrupted need regularly carry out pump detection and workover, changes underproof sucker rod and oil well pump.At gas, when the higher oil well of oil ratio carries out pump detection and workover, gush in order to prevent oil well, must at first carry out kill-job, just can carry out construction operation.In addition, paraffin content height in the crude oil causes in the oil well production process in the oil pipe wax deposition serious, reduce pipe aperture, increased the production resistance of oil well, reduced oil well yield, in order to recover the production capacity of oil well, must regularly carry out heat and wash oil well, in time remove the wax in the oil pipe.But when inspection pump or heat were washed operation, well killing fluid or hot washing lotion can enter the stratum in a large number, and the stratum is polluted, and made that initial production recovers slower after the oil well operation, reduced oil well output.For fear of well killing fluid or hot washing lotion oil reservoir is damaged, when inspection pump or heat are washed operation, well killing fluid or hot washing lotion and oil reservoir need be isolated, prevent that well killing fluid or hot washing lotion from entering oil reservoir.
The utility model content
The purpose of this utility model is: provide a kind of and can heat wash the releasing type water plugging string of protecting oil reservoir; can be retained in the down-hole for a long time; water exit that not only can the shutoff oil well; and when oil well pump detection and workover or hot clean-up well; can prevent that well killing fluid or hot washing lotion from entering oil reservoir; avoid oil reservoir is polluted, reach the purpose of protection oil reservoir.
The technical solution adopted in the utility model is: can heat wash the releasing type water plugging string of protection oil reservoir by back-off sub, packer and ball-and-seat; and oil pipe is formed; it is characterized in that: the lower end of oil pipe connects back-off sub, and the lower end of back-off sub connects upper packer.The upper packer lower end connects oil pipe, and the lower end of oil pipe connects lower packer again, and the lower end of lower packer connects oil pipe.The lower end of oil pipe connects ball-and-seat.The position of upper packer is on the top of water layer.The position of lower packer is between water layer and oil reservoir.
What described upper packer adopted is Y441 type packer; What lower packer adopted is Y342 type packer; What back-off sub was adopted is the back-off sub of KYD-113B type.
Before this tubing string is lowered to oil well; carry out kill job earlier; be lowered to then and can heat wash the releasing type water plugging string of protecting oil reservoir; tubing string arrives the precalculated position in sleeve pipe after; suppress from oil pipe, tubing string is thrown off from back-off sub, trip out the above oil pipe of back-off sub; be lowered to flow string and go into operation, flow string can supporting various gas-tight instruments.Oil well production is after a period of time; the anti-kill-job or oil well is carried out heat wash of circulating if need only trip out the top flow string; in the operation process so afterwards; well killing fluid or hot washing lotion are intercepted by Y342 type packer and ball-and-seat; can not enter oil reservoir, thereby reach the dual purpose that heat is washed protection and water blockoff.
Each kit purposes of the utility model is:
1) KYD-113B type back-off sub: suppress from oil pipe, highly pressurised liquid promotes piston and moves upward, behind pressure rising certain value, cut off the shear pin on the piston, the lock dog of highly pressurised liquid promotion simultaneously body moves downward, when moving to the groove of overcoat, lock dog comes off from body, realizes that lower body separates on the releasing tool.
2) Y441 type packer: after putting in place under the tubing string, inject highly pressurised liquid from oil pipe, highly pressurised liquid imports into and sets piston, and it is descending that piston promotes lock tooth, upper cone, slip spider, simultaneously the up compression packing element of fluid cylinder; When pressure reaches the 9MPa left and right sides, prevent that setting shear pin is cut off, continue to suppress, slips opens the realization grappling, packing element radial deformation sealing oil sets annular space; Because the effect of lock ring, slips is in the grappling state all the time after the oil pipe release.Finish and set.
3) Y342 type packer: after putting in place under the tubing string, inject highly pressurised liquid from oil pipe, highly pressurised liquid promotes up and down fluid cylinder, the well-flushing cover is up, when pressure reaches the 9MPa left and right sides, anti-ly sets shear pin and is cut off; Continue to suppress, well-flushing overlaps up compression packing element radial deformation, the sealing oil sets annular space, because the effect of lock tooth, packing element is in Seal Oil collar-shaped spatiality all the time after the oil pipe release, finishes setting.
4) ball-and-seat: the bottommost that is connected on tubing string.Before the packer setting, as the kit of packer setting, the passage between the packing oil jacket is set up confined space when making hydraulic setting formula packer setting; Behind the packer setting, utilize the principle of the unidirectional communication of ball-and-seat, during production, ball-and-seat is opened, and links up the oil jacket of target zone, produces; Anti-circulation kill-job or oil well carried out heat when washing, ball-and-seat is closed, and reaches the purpose of protection oil reservoir.
The utility model operation process is:
Finish design of string pipe and be connected; Tubing string is arrived precalculated position, operation as follows down:
1) set Y342 type packer: oil pipe is suppressed and is set Y342 type packer;
2) set Y441 type packer: oil pipe is suppressed and is set Y441 type packer;
3) back-off sub: suppress back-off sub, trip out the above oil pipe of back-off sub;
4) following flow string: be lowered to flow string and go into operation, flow string can supporting various gas-tight instruments;
5) pump detection and workover: the anti-kill-job that circulates, trip out the top flow string, well killing fluid is intercepted by Y342 type packer and ball-and-seat, can not enter oil reservoir, reaches the purpose of protection oil reservoir;
6) heat is washed operation: the anti-well-flushing that follows, hot washing lotion is intercepted by Y342 type packer and ball-and-seat, can not enter oil reservoir, reaches the purpose of protection oil reservoir.
The beneficial effects of the utility model are: can heat wash the releasing type water plugging string of protecting oil reservoir, place in the oil well by giving up, be retained in the down-hole and also can separate fully with flow string, not influence tripping out, being lowered to of flow string.Energy shutoff water layer avoid the formation water of water layer to enter flow string, and the bottom ball-and-seat guarantees that oil reservoir continues to the flow string fuel feeding.When changing operation when needs heat is washed flow string or to flow string, hot washing lotion or well killing fluid are intercepted by packer and ball-and-seat, can not enter oil reservoir, avoid oil reservoir is polluted, and reach the purpose of protection oil reservoir.Can not only heat wash the protection oil reservoir, can also utilize this tubing string to carry out the water blockoff function, the production operation of very suitable water breakthrough oil well.
The packer long service life can reach 8 years; Seal pressure differential is big, reaches 50MPa.Can avoid the working fluid leakage by this tubing string, improve heat and wash quality.
Description of drawings
Fig. 1 can heat wash the releasing type water plugging string structural representation of protecting oil reservoir.
Among the figure, 1. oil pipe, 2. back-off sub, 3.Y441 type packer, 4.Y342 type packer, 5. ball-and-seat, 6. water layer, 7. oil reservoir.
The specific embodiment
Embodiment 1: consult Fig. 1.With an adaptation sleeve pipe specification be 139.7mm can heat wash the protection oil reservoir the releasing type water plugging string be example, further specify.30 meters of water layer thicknesses, 40 meters of core intersections, the distance between water layer 6 and the oil reservoir 7 is 80 meters.
The releasing type water plugging string that can hot wash the protection oil reservoir is by KYD-113B type back-off sub 2, Y441 type packer 3, Y342 type packer and ball-and-seat 4, and oil pipe 1 is formed.The lower end of oil pipe 1 connects KYD-113B type back-off sub 2, and the lower end of KYD-113B type back-off sub 2 connects 1 Y441 type packer 3.The position of Y441 type packer 3 is at 20 meters, top of water layer 6.Y441 type packer 3 lower ends connect oil pipe 1.The length of oil pipe 1 is 80 meters.The lower end of oil pipe 1 connects 1 Y342 type packer 4, and the lower end of Y342 type packer 4 connects oil pipe 1.The length of oil pipe 1 is 90 meters.The lower end of oil pipe 1 connects ball-and-seat 5 again.The position of Y342 type packer 4 is between water layer 6 and oil reservoir 7.
The utility model is 43 wells that reach on probation at the scene since exploitation, construction success rate 100%.By washing monthly production performance tracking in well construction front and back of operation, show that tubing string is normal in underground work, oilwell produced fluid amount and the basic no change of moisture content before and after the well-flushing to implementing heat.With compare before this tubing string down, hot washing lotion consumption is whole to descend 25%, the 85m before wherein WN7 well and WX3-57 well use hot washing lotion amount by operation
3Drop to present 55m
3, effect is very remarkable, has effectively shortened the oil well discharge opeing cycle, has recovered oil well productivity rapidly, has avoided the injury of hot washing lotion to oil reservoir.
Claims (2)
1; a kind of releasing type water plugging string that can hot wash the protection oil reservoir; by back-off sub (2); packer (3; 4) and ball-and-seat (5); and oil pipe (1) is formed; it is characterized in that: the lower end of oil pipe (1) connects back-off sub (2); the lower end of back-off sub (2) connects upper packer (3); upper packer (3) lower end connects oil pipe (1); the lower end of oil pipe (1) connects lower packer (4) again; the lower end of lower packer (4) connects oil pipe (1); the lower end of oil pipe (1) connects ball-and-seat (5); the position of upper packer (3) is on the top of water layer (6), and the position of lower packer (5) is between water layer (6) and oil reservoir (7).
2, the releasing type water plugging string that can hot wash the protection oil reservoir according to claim 1, what upper packer (3) adopted is Y441 type packer; What lower packer (4) adopted is Y342 type packer; What back-off sub (2) was adopted is the back-off sub of KYD-113B type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201872489U CN201148843Y (en) | 2007-12-19 | 2007-12-19 | Releasing type water block pipe pillar capable of heat washing to protect oil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201872489U CN201148843Y (en) | 2007-12-19 | 2007-12-19 | Releasing type water block pipe pillar capable of heat washing to protect oil layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201148843Y true CN201148843Y (en) | 2008-11-12 |
Family
ID=40116609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201872489U Expired - Fee Related CN201148843Y (en) | 2007-12-19 | 2007-12-19 | Releasing type water block pipe pillar capable of heat washing to protect oil layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201148843Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536183A (en) * | 2012-01-31 | 2012-07-04 | 中国石油化工股份有限公司 | Underground gas injection pipe column |
-
2007
- 2007-12-19 CN CNU2007201872489U patent/CN201148843Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536183A (en) * | 2012-01-31 | 2012-07-04 | 中国石油化工股份有限公司 | Underground gas injection pipe column |
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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: 20081112 Termination date: 20111219 |