CN2542825Y - Formation protective device for downhole clean-out operation - Google Patents
Formation protective device for downhole clean-out operation Download PDFInfo
- Publication number
- CN2542825Y CN2542825Y CN 02213116 CN02213116U CN2542825Y CN 2542825 Y CN2542825 Y CN 2542825Y CN 02213116 CN02213116 CN 02213116 CN 02213116 U CN02213116 U CN 02213116U CN 2542825 Y CN2542825 Y CN 2542825Y
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- CN
- China
- Prior art keywords
- oil
- stratum
- top connection
- utility
- pump
- 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 - Fee Related
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Abstract
The utility model discloses a stratum protection device of an underwell flushing operation in petroleum industry, which comprises an upper joint, a lower joint and a blocked chip. The upper joint is connected with the lower joint and the blocked chip is arranged inside and moves up and down in the upper joint. The utility model reaches down to the underwell together with an oil pipe and an oil extracting pump. When in well flushing, a flushing liquid can move upwards only instead of move downwards, taking filthy thing on and inside the pump of the oil pipe. The blocked chip is a special rubber product which has little effect on the pump and a reasonable structure. The utility model plays a function of protecting the stratum and reaches a goal of improving energy output of the oil wells and improving recovery ratio of crude oil when the oil well has a leakage to the stratum.
Description
Technical field
The utility model belongs to the mining equipment of petroleum industry, and particularly down-hole clean-out service stratum protection device is applicable to that there is the producing well of leakage on the stratum.
Technical background
At present, at the exploitation scene of petroleum industry, along with the prolongation of exploitation time, the stratum is in debt to increase, and causes that flushing fluid enters the stratum when well-flushing.Not only cause and the thing of leading in the oil pipe can't be come out, and a large amount of flushing fluids enters the stratum, polluted the stratum, make the permeability decrease on stratum, influence oil well productivity, finally cause oil recovery factor to descend.Its seal of stratum protection device of using is a metal product at present, and density is big, loss in head is big, and unreasonable structure is big to the pump efficiency influence, influences oil well productivity.
Summary of the invention
The purpose of this utility model is to make down-hole clean-out service stratum protection device, overcomes the above-mentioned shortcoming of prior art, changes structure, changes material.Minimizing improves the production capacity of oil well to the influence of pump efficiency, and oil recovery factor is improved on the protection stratum.
The present technique solution can reach above-mentioned purpose: the utility model is made up of top connection, lower contact and stifled core etc., and top connection is connected with lower contact, and stifled core is loaded on wherein, and stifled core can move up and down in top connection.
The utility model compared with prior art, and is rational in infrastructure, and stifled core is the specific rubber goods, and density is little, loss in head is little, little to the pump efficiency influence.During well-flushing, when flushing fluid is flowed through the utility model by oil sets annular space, stopped by the glue of its underpart is stifled, can only enter this device by the liquid flow hole on the utility model top.That blocks up core simultaneously owing to device is interior stops that flushing fluid can't continue to flow downward, and can only upwards flow, and oil pipe flows to ground on oil well pump and pump, and dirt is wherein carried out, reaches the protective effect to the stratum.The oil well that especially stratum is had leakage plays the protection stratum, improves the purpose of oil well productivity, thereby improves oil recovery factor when well-flushing.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with embodiment the utility model is done further detailed description: down-hole clean-out service stratum protection device; form by top connection 1, lower contact 5 and stifled core 2 etc.; top connection 1 is connected with lower contact 5, and stifled core 2 is loaded on wherein, and stifled core 2 can move up and down in top connection 1.Top connection 1 is the inner cylindrical body that step is arranged, top radially be provided with liquid flow hole several; Middle bench is provided with centre bore, is axially arranged with 2 of liquid flow holes or several around the centre bore; The bottom also is provided with step.Bottom diameter and upper end external diameter are equipped with screw thread.Lower contact 5 is provided with centre bore, and there is step at the middle part, and its upper and lower end external diameter is equipped with screw thread.Stifled core 2 is the anchor shape, and its body of rod matches with the centre bore of top connection 1 middle bench, can move up and down by the centre bore along top connection 1 middle bench in top connection 1.There is platform at the middle part of stifled core 2 bodies of rod, and the bottom is the dome cone.Stifled seat 3 is installed between the step of lower contact 5 tops and top connection 1 bottom, and the centre bore of stifled seat 3 is a cone-shaped inner hole, matches with the dome cone of stifled core 2 bottoms, utilizes the conical surface of dome cone and cone-shaped inner hole to realize sealing, constitutes ball-and-seat.Stifled 4 outward appearances of glue are the dish shape, are installed under the step of lower contact 5.Below the glue stifled 4 apical ring 6 is installed, apical ring 6 inside and outside footpaths are equipped with screw thread, and its top external diameter is provided with chamfering.With the utility model with oil pipe and oil well pump in well, general depth of setting 2-3 root oil pipe place under oil well pump.Oil well is when ordinary production, and well liquid, is come out by the oil well pump pumping to the oil well pump standing valve by tail pipe, ball-and-seat structural flow of the present utility model.The bottom dome cone of wherein stifled core 2 is the specific rubber goods, and oil well pump is in normal pumping process, and the flow through loss in head of this device of formation fluid is very little, and is less to the pump efficiency influence.During well-flushing, flushing fluid is circulated by oil pipe on sleeve valve, ring set space, the utility model, oil well pump and the pump, carry out in the pump and the dirt in the oil pipe on the pump with cementing truck.
Claims (4)
1, down-hole clean-out service stratum protection device is made up of top connection (1), lower contact (5) and stifled core (2) etc., it is characterized in that top connection (1) is connected with lower contact (5), and stifled core (2) is loaded on wherein, and stifled core (2) can move up and down in top connection (1).
2, down-hole according to claim 1 clean-out service stratum protection device is characterized in that top connection (1) is the inner cylindrical body that step is arranged, and middle bench is provided with centre bore, is axially arranged with 2 of liquid flow holes or several around the centre bore.
3, down-hole according to claim 1 clean-out service stratum protection device is characterized in that stifled core (2) is the anchor shape, and the body of rod matches with the centre bore of top connection (1) middle bench, and there is platform at the middle part of its body of rod, and the bottom is the dome cone.
4, down-hole according to claim 1 clean-out service stratum protection device; it is characterized in that stifled seat (3) is installed between the step of lower contact (5) top and top connection (1) bottom; the centre bore of stifled seat (3) is a cone-shaped inner hole, matches with the dome cone of stifled core (2) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213116 CN2542825Y (en) | 2002-03-02 | 2002-03-02 | Formation protective device for downhole clean-out operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213116 CN2542825Y (en) | 2002-03-02 | 2002-03-02 | Formation protective device for downhole clean-out operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2542825Y true CN2542825Y (en) | 2003-04-02 |
Family
ID=33692674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02213116 Expired - Fee Related CN2542825Y (en) | 2002-03-02 | 2002-03-02 | Formation protective device for downhole clean-out operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2542825Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481301A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of limit-type Underwell anti-injection sand washing blanking plug of monomer |
-
2002
- 2002-03-02 CN CN 02213116 patent/CN2542825Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481301A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of limit-type Underwell anti-injection sand washing blanking plug of monomer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |