CN2546651Y - Sand stop oil well pump - Google Patents
Sand stop oil well pump Download PDFInfo
- Publication number
- CN2546651Y CN2546651Y CN 02232339 CN02232339U CN2546651Y CN 2546651 Y CN2546651 Y CN 2546651Y CN 02232339 CN02232339 CN 02232339 CN 02232339 U CN02232339 U CN 02232339U CN 2546651 Y CN2546651 Y CN 2546651Y
- Authority
- CN
- China
- Prior art keywords
- sand
- plunger
- retaining ring
- utility
- model
- 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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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model provides a sand retaining oil pump which can avoid sand sticking and reducing the abrasion caused by sand, comprising a pump cylinder (9), an oil inlet valve (7) and a plunger body (5). The utility model is characterized in that the sand retaining ring (2), (8) are respectively arranged on both ends of the plunger; both ends of the sand retaining ring (2) are in hydraulic communication by a through hole when the fluid flows through a sand filtering net (6) and the through hole (4); the sand is prevented from entering the sealed gap between the pump cylinder and the plunger by the sand retaining ring (2), (8) so that the sand sticking is avoided and the abrasion caused by sand is reduced. The upper and lower ends of the sand retaining ring have no pressure difference; thereby, the long service life of the sand retaining ring is ensured. The utility model has outstanding performance, low cost and wide application range.
Description
The utility model relates to the oil well pump 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 well pump 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.
The purpose of this utility model just provides a kind of sand grains that can prevent and enters the seal clearance between pump barrel and the plunger, thereby alleviates a kind of sand block oil well pump of sand milling.
The purpose of this utility model be achieved in that the upper end of plunger body be equipped with one and plunger body between sealing and the sand retaining ring 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, sand retaining ring 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 make sand retaining ring are by this intercommunicating pore hydraulic communication.When plunger was up: sand retaining ring 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, the purpose of this utility model is achieved.In order to make plunger when descending, also can stop sand grains to enter seal clearance between pump barrel and the plunger, a sand retaining ring also is installed below plunger body, then can more effectively improve the sand block technical performance of this model utility.
Because intercommunicating pore makes the hydraulic communication of two ends up and down of sand retaining ring, pressure reduction is zero, can not produce bigger positive pressure between sand retaining ring and the pump barrel inwall, thereby guaranteed that sand retaining ring is preventing the sand card, alleviating under the prerequisite of sand milling and have long working life, and manufacturing is easy, cost is low, use is easy to maintenance.
Below in conjunction with drawings and Examples the utility model is described further.
Accompanying drawing is an embodiment's of the present utility model vertical profile structural representation.
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; Sand retaining ring (2), (8) adopt elastic organic materials such as oil resistant rubber or nylon to make, 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, the structure of following sand retaining ring (8) can be identical with last sand retaining ring (2), 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 diameter 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.
Last sand retaining ring (2) directly links to each other with filter sand net (6), filter sand net (6) all belongs to protection domain of the present utility model with the structural type that plunger body (5) directly links to each other.
Claims (2)
1. oil well pump of forming by pump barrel (9), plunger body (5), outlet valve (7) etc., it is characterized in that: there is a sand retaining ring that links to each other with plunger body (2) the plunger upper end, also have the filter sand net (6) of a tubular in the plunger body (5), between filter sand net (6) two ends, have the intercommunicating pore (4) that is communicated with the plunger inside and outside wall.
2. oil well pump according to claim 1 is characterized in that: also have a sand retaining ring (8) in the lower end of plunger body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232339 CN2546651Y (en) | 2002-04-17 | 2002-04-17 | Sand stop oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232339 CN2546651Y (en) | 2002-04-17 | 2002-04-17 | Sand stop oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2546651Y true CN2546651Y (en) | 2003-04-23 |
Family
ID=33707766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02232339 Expired - Fee Related CN2546651Y (en) | 2002-04-17 | 2002-04-17 | Sand stop oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2546651Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392817A (en) * | 2011-12-12 | 2012-03-28 | 刘庆敏 | Sand-blocking ring for defueling pump |
| CN106640610A (en) * | 2016-11-04 | 2017-05-10 | 中国石油天然气股份有限公司 | Anti-scaling trinity oil well pump |
| CN115126481A (en) * | 2022-06-28 | 2022-09-30 | 广州海洋地质调查局 | Method and device for determining performance of sand blocking medium |
-
2002
- 2002-04-17 CN CN 02232339 patent/CN2546651Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392817A (en) * | 2011-12-12 | 2012-03-28 | 刘庆敏 | Sand-blocking ring for defueling pump |
| CN106640610A (en) * | 2016-11-04 | 2017-05-10 | 中国石油天然气股份有限公司 | Anti-scaling trinity oil well pump |
| CN115126481A (en) * | 2022-06-28 | 2022-09-30 | 广州海洋地质调查局 | Method and device for determining performance of sand blocking medium |
| CN115126481B (en) * | 2022-06-28 | 2023-09-29 | 广州海洋地质调查局 | Method and device for determining performance of sand blocking medium |
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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 |