CN202731826U - Constant-pressure opening blanking plug used for separated-layer water injection - Google Patents
Constant-pressure opening blanking plug used for separated-layer water injection Download PDFInfo
- Publication number
- CN202731826U CN202731826U CN 201220155828 CN201220155828U CN202731826U CN 202731826 U CN202731826 U CN 202731826U CN 201220155828 CN201220155828 CN 201220155828 CN 201220155828 U CN201220155828 U CN 201220155828U CN 202731826 U CN202731826 U CN 202731826U
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- blanking plug
- constant
- separated
- water injection
- layer water
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- Expired - Fee Related
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Abstract
The utility model discloses a constant-pressure opening blanking plug used for separated-layer water injection. The constant-pressure opening blanking plug used for the separated-layer water injection is specially designed to resolve the problems that a separated injection technology running and pulling operation is huge in risk, large in workload and high in cost. A constant-pressure opening blanking plug fixed through a pin is arranged on the upper portion of a ceramic throttle inside a general bridge type eccentric blanking plug so as to achieve a function of plugging the blanking plug temporarily. The constant-pressure opening blanking plug is placed down to a designed position along with a technique pipe in working, and after a packer is sufficiently set, pressure is then charged slowly to a designed pressure in the blanking plug. Then, the pin is cut, the blanking plug is opened, and normal separated-layer water injection is started. The blanking plug is ingenious in conception, simple in design, safe and reliable in usage, low in operating cost and high in working efficiency. According to a field test, technology success rate is 100%, running and pulling cost of a single well can be saved by 6000-9000 yuan, running and pulling time can be saved by 5-6 hours, and economic benefit is extremely obvious.
Description
Technical field
The utility model relates to a kind of constant pressure turn on blanking plug for seperated layer water injection, belongs to the oilfield exploitation technical field.
Background technology
The separate layer water injection string of at present separated-zone water infection oil field well employing mainly adopts compression packer, and it sets pressure up to more than the 18MPa.In order to guarantee that packer reliably sets, when going into the well, each eccentric injection mandrel need throw dead mouth.After packer fully set, the tester went into the well the pulling instrument with logging truck, and the blanking plug of band was pulled out when each injection well downhole flow regulator was gone into the well, trip out ground, change the dead mouth of blanking plug, load onto suitable water nozzle, again blanking plug is shipped in the down-hole eccentric device, finishes the pulling allotment of one deck.For the eccentric separated-injection well, every layer needs pulling allotment 2 times, and pulling allotment workload is large, and meeting card machine can be many, if there is a layer process unsuccessful, just needs again operation, increases construction risk and corresponding expense.
Summary of the invention
The purpose of this utility model is to provide a kind of constant pressure turn on blanking plug for seperated layer water injection, it can solve the problem that eccentric separated-injection technique pulling operating risk is large, workload is large and cost is high, need not the stratified injection water technology of pulling stagnant water mouth and direct water filling behind the realization packer setting.
Concrete technical scheme of the present utility model is as follows:
Be provided with one by the fixing constant pressure turn on piston of pin on conventional bridge-type eccentric blanking plug inner ceramic water nozzle top.
This water filling constant pressure turn on stops up the method that adopts adherence pressure to setup pressure value to suppress, and cuts off pin, opens blanking plug, realizes blanking plug constant pressure turn on function.This blanking plug is skillfully constructed, simplicity of design, safe and reliable, the running cost expense is low and high efficiency.Through field trial, technique success rate 100%, individual well is saved pulling cost 6000-9000 unit, saves 5-6 hour pulling time, economic benefit and remarkable.
Description of drawings
Fig. 1 opens front structural representation for the constant pressure turn on blanking plug that is used for seperated layer water injection.
Fig. 2 is the structural representation after opening for the constant pressure turn on blanking plug of seperated layer water injection.
The specific embodiment
With reference to Fig. 1 and 2 embodiment of the present utility model is further specified:
Embodiment:
The utility model is to arrange one on the top of the ceramic water nozzle 3 of conventional bridge-type eccentric blanking plug inside by pin 1 constant pressure turn on piston 2 fixing and that be provided with the circumferential seal circle, this constant pressure turn on piston 2 is that a diameter is 11mm, thickness is the cylindric piston of 15mm, with ceramic water nozzle 3 tops in its blanking plug of packing into, adopt pin 1 fixing, realize the function of temporary transient shutoff blanking plug.Cutting off pin 1 needed oil pipe and oil jacket annulus pressure is 15-20MPa, and the required oil jacket pressure reduction of supporting packer setting is 15MPa, to guarantee that packer fully sets rear constant pressure turn on blanking plug and just moves.
The utility model adopts hammering method, namely behind packer setting, blanking plug is in not opening (shown in Figure 1), and continuing increases pressure 2-5MPa in oil pipe, destroys pin 1, constant pressure turn on piston 2 up (shown in Figure 2), blanking plug is opening, and injected water is entered by the blanking plug lower end, through ceramic water nozzle 3, enter the stratum by blanking plug outlet and injection well downhole flow regulator fluid hole at last, realize normal water filling.
In the work progress, adopt the process pipe string that is formed by CQFF03 anticorrosive paint oil pipe, PSQ-114 bridge type eccentric injection mandrel, Y341-115 low pressure set packer, ball seat, screen casing and plug from top to bottom.Process pipe string is suppressed 5MPa, 8MPa, 10MPa and 12MPa successively behind design attitude, each voltage stabilizing 5min fully sets packer, and Pressure Drop is qualified less than 0.5MPa.After packer fully sets, continue slowly to suppress to 20MPa, the cementing truck gauge hand has obvious falling in the process if suppress, and then explanation has a constant pressure turn on piston to open.By that analogy, continue to suppress to 20MPa, until after all constant pressure turn on pistons 2 all open, begin normal seperated layer water injection.
Claims (1)
1. constant pressure turn on blanking plug that is used for seperated layer water injection is characterized in that:
Be provided with one by the fixing constant pressure turn on piston (2) of pin (1) on conventional bridge-type eccentric blanking plug inner ceramic water nozzle (3) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155828 CN202731826U (en) | 2012-04-13 | 2012-04-13 | Constant-pressure opening blanking plug used for separated-layer water injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155828 CN202731826U (en) | 2012-04-13 | 2012-04-13 | Constant-pressure opening blanking plug used for separated-layer water injection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202731826U true CN202731826U (en) | 2013-02-13 |
Family
ID=47657538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220155828 Expired - Fee Related CN202731826U (en) | 2012-04-13 | 2012-04-13 | Constant-pressure opening blanking plug used for separated-layer water injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202731826U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267978A (en) * | 2018-09-07 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of separate injection tubing string |
| CN115341884A (en) * | 2022-09-06 | 2022-11-15 | 延长油田股份有限公司 | Concentric double-pipe layered water injection process |
-
2012
- 2012-04-13 CN CN 201220155828 patent/CN202731826U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267978A (en) * | 2018-09-07 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of separate injection tubing string |
| CN115341884A (en) * | 2022-09-06 | 2022-11-15 | 延长油田股份有限公司 | Concentric double-pipe layered water injection process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20210413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |