CN205078231U - Separate layer acid treatment switch ware - Google Patents
Separate layer acid treatment switch ware Download PDFInfo
- Publication number
- CN205078231U CN205078231U CN201520689267.6U CN201520689267U CN205078231U CN 205078231 U CN205078231 U CN 205078231U CN 201520689267 U CN201520689267 U CN 201520689267U CN 205078231 U CN205078231 U CN 205078231U
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- China
- Prior art keywords
- overcoat
- hole
- sliding sleeve
- central
- tube wall
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to a separate layer acid treatment switch ware comprises pin, valve ball, sliding sleeve and sealing washer, and wherein the overcoat is the tubular structure, and the central through hole is the echelonment, and its upper portion is equipped with interior circular bead, and it has axially extending bore to open on the pipe wall, and it has radial biography to press the hole to open on the outer pipe wall on upper portion, and it has radial water conservancy diversion hole to open on the outer pipe wall of lower part, the sliding sleeve is the tubular structure, and its upper portion is the ball seat, opens to have on the pipe wall of lower part and radially crosses the discharge orifice, fixes the lower part at the central through hole of overcoat through pinning, the piston is " T " font tubular structure, and its upper portion is equipped with outer circular bead, pegs graft in the central through hole of overcoat. The beneficial effects of the utility model are that, when separate layer acid treatment construction pressure is high, can open the switch ware earlier and target the acidizing fluid transport in place, then close, continue to implement the acidizing, reduced construction pressure and safe risk.
Description
Technical field
The utility model relates to acidification of oil field and to construct the derailing switch used, the derailing switch that especially a kind of applicable separate layer acid treatment uses.
Background technology
Because high pressure low permeability reservoir water pressure is high, increasing injection need be implemented by acidifying measure, for reducing the interference of interlayer difference, make each layer absorb acid solution relatively uniformly, improving acidification effect, the normal mode adopting the separate layer acid treatment of card envelope.One-level two sections of separate layer acid treatment tubing strings are usually installed a derailing switch by packer and packer top and are realized, tubing string is rear first base sealed packer down to design level position, acidifying bottom oil layer is directly injected by oil pipe, during the oil reservoir of acidifying top, valve ball is dropped into derailing switch from oil pipe, lower passage in plugging tubing string, after ground raises the pod apertures of tubing pressure opening switch device side, continues to inject acid solution acidifying upper strata from oil pipe.Ordinary tap device is primarily of overcoat, sliding sleeve, valve ball and pin composition, and when after valve ball and sliding sleeve fitted seal, to cut off pin descending for sliding sleeve under pressure, and the discharge orifice of sliding sleeve sealing exposes, and realizes oil jacket connection, acid solution is delivered to acidifying layer position.When acidifying lower floor constructs, if when bottom operation pressure is close to well head rated pressure, interval injects the defect that construction life period extends.
ZL200820118538.2 discloses a kind of layered acidizing switch device, be made up of valve body, valve ball, sliding sleeve and pin, suppress after throwing valve ball to sliding sleeve and cut off pin, sliding sleeve comes downwards to the straight hole section position of next stage acidifying switch, realize oil pipe and combination of zones after oil jacket intercommunicating pore exposes, formation implements acidifying.When operation pressure height, there is the defect of engineering time prolongation.
Utility model content
The purpose of this utility model is for separate layer acid treatment tubing string, when operation pressure height, there is the problem of engineering time prolongation, provide one can acid solution conveying be put in place first opening switch device, and then close, continue the derailing switch implementing acidifying, reduce operation pressure and security risk.
The technical scheme that the utility model adopts is: be made up of overcoat, sliding sleeve, valve ball and pin, wherein overcoat is tubular structure, the upper/lower terminal of overcoat is connected with top connection and lower contact respectively by screw thread, the central through hole of overcoat is stepped, its top is provided with interior shoulder, the tube wall of overcoat has axially through through hole, the outer tube wall on the top of overcoat has radial pressure transmission hole, the outer tube wall of the bottom of overcoat has radial guiding discharge orifice; Sliding sleeve is tubular structure, and its top is ball seat, and the tube wall of the sliding sleeve of ball seat bottom has radial flowing hole, and sliding sleeve is fixed by a pin to the bottom of the central through hole of overcoat; Piston is " T " font tubular structure, and its top is provided with outer shoulder, and piston is plugged in the central through hole of the overcoat on sliding sleeve top; The central through hole of lower contact is stepped, and the internal diameter of its underpart central through hole is less than the external diameter of sliding sleeve.
The beneficial effects of the utility model are, when separate layer acid treatment operation pressure height, acid solution conveying can be put in place by first opening switch device, and then close, continue the derailing switch implementing acidifying, reduce operation pressure and security risk.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1: structural representation of the present utility model.
Fig. 2: the sectional drawing of A-A in the utility model Fig. 1.
Detailed description of the invention
With reference to accompanying drawing, the utility model is made up of top connection 1, piston 2, overcoat 4, sliding sleeve 7, lower contact 8, wherein, overcoat 4 is tubular structure, and the upper/lower terminal of overcoat 4 is connected with top connection 1 and lower contact 8 respectively by screw thread, and the central through hole of overcoat 4 is stepped, its top is provided with interior shoulder, the tube wall of overcoat 4 has axially through through hole 43, the outer tube wall on overcoat 4 top has radial pressure transmission hole 41, the outer tube wall of the bottom of overcoat 4 has radial guiding discharge orifice 42; Sliding sleeve 7 is tubular structure, and its top is ball seat, and the tube wall of the sliding sleeve 7 of ball seat bottom has radial flowing hole 71, and sliding sleeve 7 is fixed on the bottom of the central through hole of overcoat 4 by pin 5; Piston 2 is " T " font tubular structure, and its top is provided with outer shoulder, and piston 2 is plugged in the central through hole of the overcoat 4 on sliding sleeve 7 top; The central through hole of lower contact 8 is stepped, and the internal diameter of its underpart central through hole is less than the external diameter of sliding sleeve 7.
Radial guiding discharge orifice 42 on the lower outer tubes wall of described overcoat 4 is preferably 3 or 4, and corresponding with the radial flowing hole 71 on sliding sleeve 7 tube wall.
The through through hole 43 of axis on the tube wall of described overcoat 4 is several uniform through holes.
Shoulder bottom, top and the pod apertures about 42 of the centre bore of described overcoat 4 all have seal groove, and are provided with sealing ring 3.
There is seal groove at shoulder place, described piston 2 top, and is provided with sealing ring 3.
During use, first the utility model is connected to packer top, is transported to design attitude with oil pipe.By injecting acid solution acidifying bottom oil layer to oil pipe after the base sealed packer of ground, when the pressure of acidifying bottom oil layer is increased to the predetermined pressure of pin 5, under oil jacket differential pressure action, it is descending that piston 2 promotes sliding sleeve 7, the flowing hole 71 on sliding sleeve 7 top is communicated with the pod apertures 42 of overcoat 4 bottom, can inject liquid first acidifying top oil reservoir from oil pipe.After the acid treatment of oil formation of top during acidifying bottom oil layer, first acid solution is injected into the utility model position from oil pipe, throws the top of valve ball 6 to sliding sleeve 7, continue to raise tubing pressure, the interior step place that sliding sleeve 7 comes downwards to lower contact 8 top stops, and pod apertures 42 is again closed.Be communicated with bottom the through hole 43 that the flowing hole 71 on sliding sleeve 7 top is through with the axis of the tube wall of overcoat 4 simultaneously, upper flow enters bottom tubing string by the axially extending bore 43 of main body 4 and the flowing hole 71 of sliding sleeve 7, continues acidifying bottom oil layer.
Claims (5)
1. a layered acidizing switch device, comprise by top connection (1), piston (2), overcoat (4), sliding sleeve (7), lower contact (8) forms, it is characterized in that: overcoat (4) is tubular structure, overcoat (4) upper, lower two ends are connected with top connection (1) and lower contact (8) respectively by screw thread, the central through hole of overcoat (4) is stepped, its top is provided with interior shoulder, the tube wall of overcoat (4) has axially through through hole (43), the outer tube wall on overcoat (4) top has radial pressure transmission hole (41), the outer tube wall of the bottom of overcoat (4) has radial guiding discharge orifice (42), sliding sleeve 7 is tubular structure, and its top is ball seat, and the tube wall of the sliding sleeve (7) of ball seat bottom has radial flowing hole (71), and sliding sleeve (7) is fixed on the bottom of the central through hole of overcoat (4) by pin (5), piston (2) is " T " font tubular structure, and its top is provided with outer shoulder, and piston (2) is plugged in the central through hole of overcoat (4) on sliding sleeve (7) top, the central through hole of lower contact (8) is stepped, and the internal diameter of its underpart central through hole is less than the external diameter of sliding sleeve (7).
2. a kind of layered acidizing switch device according to claim 1, is characterized in that: the radial guiding discharge orifice (42) on the outer tube wall of the bottom of overcoat (4) is preferably 3 or 4, and corresponding with the radial flowing hole (71) on sliding sleeve (7) tube wall.
3. a kind of layered acidizing switch device according to claim 1 and 2, is characterized in that: the through through hole (43) of the axis on the tube wall of overcoat (4) is several uniform through holes.
4. a kind of layered acidizing switch device according to claim 1 and 2, is characterized in that: shoulder bottom, top and the pod apertures (42) of the centre bore of overcoat (4) all have seal groove up and down, and are provided with sealing ring (3).
5. a kind of layered acidizing switch device according to claim 1 and 2, is characterized in that: there is seal groove at shoulder place, described piston (2) top, and is provided with sealing ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520689267.6U CN205078231U (en) | 2015-09-08 | 2015-09-08 | Separate layer acid treatment switch ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520689267.6U CN205078231U (en) | 2015-09-08 | 2015-09-08 | Separate layer acid treatment switch ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205078231U true CN205078231U (en) | 2016-03-09 |
Family
ID=55430645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520689267.6U Active CN205078231U (en) | 2015-09-08 | 2015-09-08 | Separate layer acid treatment switch ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205078231U (en) |
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2015
- 2015-09-08 CN CN201520689267.6U patent/CN205078231U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |