CN1338572A - Plunger of oil-well pump - Google Patents
Plunger of oil-well pump Download PDFInfo
- Publication number
- CN1338572A CN1338572A CN 00126108 CN00126108A CN1338572A CN 1338572 A CN1338572 A CN 1338572A CN 00126108 CN00126108 CN 00126108 CN 00126108 A CN00126108 A CN 00126108A CN 1338572 A CN1338572 A CN 1338572A
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- CN
- China
- Prior art keywords
- plunger
- sand
- strike
- circle
- ofing
- Prior art date
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Abstract
A plunger of oil-well pump features that a sand scraping ring is fixed to its each end and a sand filter is used to make the both sides of said sand scraping ring be hydraulically communicated to each other. Its can prevent the sand from coming into the sealed gap between pump barrel and plunger, resulting in no sand jamming, no sand abrasion and longer service life.
Description
The present invention relates to the oil pump plunger piston that uses on a kind of oil field, particularly a kind ofly can prevent the sand card, alleviate sand milling and can prolong the oil well pump oil pump plunger piston in working life.
Conventional oil well pump is when the sand-laden fluid body of suction down-hole, and the sand grains in the well liquid very easily enters the seal clearance between plunger and the pump barrel, and the lighter's worn piston, pump barrel, weight person's plunger are stuck and can't move in pump barrel, cause the oil well operation.Chinese patent ZL96249579.4 has announced a kind of " compensation, anti-sticking synergy oil well pump automatically ", the plunger of this pump adopts the device of strike-ofing that has opening of respectively placing a metal at the upper and lower end of plunger body, because this device of strike-ofing has breach, sand grains enters the gap between plunger and the pump barrel unavoidably thus, and effect is not satisfactory; Also have a kind of soft seal oil well pump on the scene, the plunger of this pump replaces the clearance seal of conventional plunger with a plurality of rubber seal that overlap.Though this plunger has the effect that prevents the sand card, alleviates sand milling, because bigger pressure reduction is born at the two ends of its rubber ring, rubber ring damages easily, and the plunger life-span is shorter.
Purpose of the present invention just provides a kind of sand grains that can prevent and enters the seal clearance between pump barrel and the plunger, thereby alleviates the oil pump plunger piston that sand milling prolongs the oil well pump life-span, prevents the sand card.
The object of the present invention is achieved like this: the upper end of plunger body be equipped with one and plunger body between the sealing and the circle of strike-ofing that is attached thereto, the filter sand net that the filtration sand grains of one tubular is arranged in plunger body, the two ends of filter sand net contact and seal with the plunger inwall, the circle of strike-ofing have an intercommunicating pore that is communicated with inside and outside the plunger up and down between the two ends, the two ends up and down that making the circle of strike-ofing are by this intercommunicating pore hydraulic communication.When plunger was up: the circle of strike-ofing had stoped sand grains directly to enter seal clearance between pump barrel and the plunger, after containing the filtration of well liquid through the filter sand net of sand, only allow less sand grains to enter seal clearance between pump barrel and the plunger, thereby prevented the sand card, alleviated sand milling, purpose of the present invention is achieved.In order to make plunger when descending, also can stop sand grains to enter seal clearance between pump barrel and the plunger, the circle of strike-ofing also is installed below plunger body, then can more effectively improve the technical performance of this invention.
Because intercommunicating pore makes the hydraulic communication of two ends up and down of the circle of strike-ofing, pressure reduction is zero, strike-off and can not produce bigger positive pressure between circle and the pump barrel inwall, thereby the circle that guaranteed to strike-off is preventing the sand card, is alleviating under the prerequisite of sand milling and have long working life, the various oil well pumps that are combined into this plunger use on sand well, can increase substantially the working life of oil well pump, and manufacturing is easy, cost is low, use is easy to maintenance.
The present invention is described further below in conjunction with drawings and Examples.
Accompanying drawing is the vertical profile structural representation of embodiments of the invention.
In the accompanying drawings, the upper connection of conventional pumps (1) should change the structure in the accompanying drawing, supreme outlet valve into; Following outlet valve adopts the mode of two series connection; The elastic organic materials such as circle (2), (8) employing oil resistant rubber or nylon of strike-ofing are made, the shape of the lip of " Y " shape seal ring can be adopted in the cross section, its free external diameter should be greater than the external diameter 0.5～1mm of plunger body (5), contact with the reliable of pump barrel inwall with assurance, and adopt between the last outlet valve bonding, vulcanize or the mode that compresses all can, strike-off down circle (8) structure can with on the circle (2) of strike-ofing identical, just installation direction is opposite, can adopt compress, sulfuration or mode such as bonding combine with following pressed joint; Boring the through hole that runs through plunger wall about 2～4 4mm on the plunger wall as intercommunicating pore (4), should be in the centre at filter sand net two ends and is positioned as close to the upper end of plunger in its position; Filter sand net (6) can be selected metal knitted cylindrical shape filter screen for use, the oil resistant rubber seal ring (3) that the preceding paragraph is used to seal is respectively vulcanized at two ends up and down, make the two ends up and down of filter sand net (6) reliably contact and seal with the interior wall energy of plunger, the external diameter of filter sand net should be slightly less than the internal diameter of plunger.
On strike-off that circle (2) directly links to each other with filter sand net (6), filter sand net (6) all belongs to protection scope of the present invention with the structural type that plunger body (5) directly links to each other.
Claims (6)
1. oil pump plunger piston of forming by upper connection, plunger body, outlet valve etc., it is characterized in that: there is a circle of strike-ofing that links to each other with plunger body the plunger upper end, also have the filter sand net of a tubular in the plunger body, between filter sand net two ends, have the intercommunicating pore that is communicated with the plunger inside and outside wall.
2. oil pump plunger piston according to claim 1 is characterized in that: also have the circle of strike-ofing in the lower end of plunger.
3. oil pump plunger piston according to claim 1 and 2 is characterized in that: the installation direction of the circle of strike-ofing up and down is opposite.
4. oil pump plunger piston according to claim 1 and 2 is characterized in that: the circle of strike-ofing is made by organic materials such as rubber, nylon.
5. oil pump plunger piston according to claim 1 is characterized in that: seal between the two ends up and down of filter sand net and the plunger inwall and contact.
6. oil pump plunger piston according to claim 1 is characterized in that: the position of intercommunicating pore is in the middle of filter sand net two ends and near the upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001261088A CN1163669C (en) | 2000-08-20 | 2000-08-20 | Plunger of oil-well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001261088A CN1163669C (en) | 2000-08-20 | 2000-08-20 | Plunger of oil-well pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1338572A true CN1338572A (en) | 2002-03-06 |
| CN1163669C CN1163669C (en) | 2004-08-25 |
Family
ID=4591742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001261088A Expired - Fee Related CN1163669C (en) | 2000-08-20 | 2000-08-20 | Plunger of oil-well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1163669C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042199A (en) * | 2011-01-21 | 2011-05-04 | 中国石油化工集团公司 | Sand-stick-proof sanding oil-well pump |
-
2000
- 2000-08-20 CN CNB001261088A patent/CN1163669C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042199A (en) * | 2011-01-21 | 2011-05-04 | 中国石油化工集团公司 | Sand-stick-proof sanding oil-well pump |
| CN102042199B (en) * | 2011-01-21 | 2014-10-15 | 中国石油化工集团公司 | Sand-stick-proof sanding oil-well pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1163669C (en) | 2004-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Gao Haibin Document name: Deemed not to advise |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Gao Haibin Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040825 Termination date: 20170820 |