CN2065255U - Pressure-compensated double-action oil pump - Google Patents
Pressure-compensated double-action oil pump Download PDFInfo
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- CN2065255U CN2065255U CN 90210636 CN90210636U CN2065255U CN 2065255 U CN2065255 U CN 2065255U CN 90210636 CN90210636 CN 90210636 CN 90210636 U CN90210636 U CN 90210636U CN 2065255 U CN2065255 U CN 2065255U
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- pump
- pressure
- oil pump
- compensator
- valve
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Abstract
The utility model discloses a pressure-compensated double-action oil pump for pumping crude oil in deep wells. The pressure-compensated double-action oil pump aims the problem of the downstream resistance of the present on-site double-action pump to be improved. A pressure-compensated device is connected with the upper part of a fixed valve on an original pump, and a shunting valve is arranged between the lower end of a hollow connecting rod and the upper end of a pump piston. The utility model solves the problems of the downstream resistance of the pump at the method of pressure compensation. The pressure-compensated double-action oil pump has the functions of automatic draining, energy conservation, and pressure self seal, and meanwhile can eliminate alternating thrust loads. The utility model has the advantages of stable operation, and low failure rate; the pressure-compensated double-action oil pump raises the reliability of the operation of the system of the complete machine.
Description
A kind of pressure difference compensation double-action deep-well oil pump that is used for pumping deep-well crude oil.
There is descending resistance problem in the on-the-spot at present double-acting pump that uses.The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and existing double acting sucker rod pump is improved, and a kind of pressure difference compensation double-action deep-well oil pump is provided.
The purpose of this utility model can reach by following measure, pressure difference compensation double-action deep-well oil pump is at former double acting sucker rod pump top standing valve (8), top standing valve body (9), screen cloth cover (10), top extension nipple (11), pump barrel (12), pump piston (15), travelling valve (16), travelling valve body (17), bottom extension nipple (18), bottom standing valve (19), standing valve body (20), improve on the basis of little screen casing (21), top in last standing valve (8), be connected to differential pressure compensator, it often opens valve cover (2) by compensator working barrel (1), often open valve (3), compensator piston (4), balance tube (5), hollow connecting rod (6), seal arrangement (7) is formed, compensator working barrel (1) joins with balance tube (5), and the lower end of balance tube (5) and seal arrangement (7) join, and the lower end of seal arrangement (7) connects with top standing valve body (9), be provided with shunting valve (13) between the upper end of the lower end of hollow connecting rod (6) and pump piston (15), shunting valve body (14).In compensator working barrel (1), often open to be provided with in the valve cover (2) and often open valve (3), between compensator working barrel (1) and hollow connecting rod (6), compensator piston (4) is housed.On the tube wall of balance tube (5), have equalizing orifice.Seal arrangement (7) adopts the unsteady self-styled black box of aligning pressure of multi-clove type.
Description of drawings: Fig. 1 is a pressure difference compensation double-action deep-well oil pump structural representation.Compensator working barrel (1) among the figure is often opened valve cover (2), often opens valve (3), compensator piston (4), balance tube (5), hollow connecting rod (6), seal arrangement (7) is formed, top standing valve (8), top standing valve body (9), screen cloth cover (10), top extension nipple (11), pump barrel (12), shunting valve (13), shunting valve body (14), pump piston (15), travelling valve (16), travelling valve body (17), bottom extension nipple (18), bottom standing valve (19), standing valve body (20), little screen casing (21).
Below in conjunction with accompanying drawing working principle of the present utility model and structure are described in further detail:
The compensator working barrel (1) of pressure difference compensation double-action deep-well oil pump inserts tubing string, slip into oil well liquid level down to the needs degree of depth, the pump of this moment is in the draining state, connect sucker rod and often open valve cover (2) by disjointed device, on carry over-stroke, and compensator piston (4) carried in the compensator working barrel (1), oil well pump is promptly in running order.After oil well pump starts, during up stroke, pump piston (15) is up, well liquid is after little screen casing filters, wash bottom standing valve (19) open, enter the following closed chamber A that forms vacuum pump, the last closed chamber B of pump by compression simultaneously, the well liquid that has sucked in the pump chamber is washed shunting valve (13) open, travelling valve this moment (16) is closed because of the below is in low pressure, well liquid can only enter tubing string by endoporus and the Chang Kai valve (3) of hollow connecting rod (6) through compensator piston (4), and up stroke is promptly finished an imbibition and a discharge opeing process.When oil well pump piston (15) goes upward to point, during reversion downwards, the following closed chamber of pump by compression, the well liquid that has sucked in the pump chamber is washed travelling valve (16) open, endoporus through pump piston (15) is located to shunting valve (13), the below of at this moment shunting valve (13) is in low pressure and closes, well liquid also can only be by hollow connecting rod (6) and compensator piston (4) endoporus and often open valve (3) and enter tubing string, well liquid is washed top standing valve (8) open by sieves net (10) simultaneously, enter in the last closed chamber B that forms vacuum pump, finished the imbibition and the discharge opeing process of down stroke at this point.
Pressure-compensated double-action oil pump has following features:
1, pressure difference compensation effect
Because the fluid column static pressure acts on the cross section of compensator piston (4) in the tubing string, be delivered on the pump piston (15) by hollow connecting rod (6), when the sectional area of compensator piston (4) equates with the sectional area of pump piston (15), the descending thrust of this pump is identical with single-acting pump, thereby after having solved single-acting pump and making double-acting pump into, because last closed chamber has been blocked the descending resistance of the interior fluid column static pressure of tubing string to piston, and make the descending difficult technologies key of pump, make double-acting pump reach practical purpose.
2, power saving function
Because deep-well oil pump must slip into certain depth work under the oil well liquid level, when pump piston (15) is up, pump is hung above producing fluid level static pressure through counter balance pocket C, act on the lower end of compensator piston (4), produce a buoyancy and promote that it is up, thereby reduced fluid column static pressure in the tubing string that pumping unit need overcome.Thereby have an energy-conservation effect, and under the general operating mode, every cubic metre of comparable single-acting pump of liquid-extracting amount is saved 20-30%, and single-acting pump is then because the pump epicoele only communicates with tubing string, do not communicate with well chamber casing space and do not have this function.When descent of piston, though the producing fluid level static pressure can produce the descending thrust that an opposite force reduces pump, this moment is because the unlatching of pump top valve, the producing fluid level static pressure affacts on the piston again simultaneously, increase a part of descending thrust again, two power offset, and the actual downstream of pump promotes unaffected.
3, automatic oil draining function
Because compensator piston (4) can all enter counter balance pocket C, compensator working barrel and well liquid phase are led to, and pump is in the draining state, convenient working can not play sucker rod and piston again and carries out the circulation well cleanup operation.
4, the self-styled function of pressure
Obturator adopts the unsteady self-styled black box of aligning pressure of multi-clove type, has solved the sealing problem of pump work under the deep-well condition.
5, eliminate the alternation thrust load
This pump is when up stroke, though travelling valve (16) is closed, but often opening valve (3) opens, fluid column static pressure in the tubing string is affacted on the top standing valve (8) of pump, during down stroke, travelling valve (16) is opened, static pressure acts on the bottom standing valve (19) in the tubing string, therefore oil pipe is in the dead load state, and single-acting pump is when the pump up stroke, the change of fluid column static pressure acts on the sucker rod in the tubing string, thereby eliminated sucker rod, the alternation shock loads of pumping unit and oil pipe, can improve whole three odd test (pumping units, sucker rod, oil well pump) stationarity and the reliability of mechanical oil production system motion reduce the fatigue of sucker rod and analyse disconnected and all system mechanical failure.
6, can make the no-load voltage ratio suction booster into
Increase compensator piston and pump piston section than the time, the thrust of pump is increased, adapted to thickened oil recovery.
Pressure difference compensation double-action deep-well oil pump has solved the descending resistance problem of pump with the method for pressure difference compensation, and has a function of automatic draining, simplified operation, the unsteady self-styled black box of aligning pressure of multi-clove type is adopted in sealing, improved sealability, eliminated the alternation thrust load after, pumping unit running is steadily, reduce mechanical failure, improved the reliability of machine system work.
Claims (4)
1, a kind of pressure difference compensation double-action deep-well oil pump, it is by top standing valve (8), top standing valve body (9), top extension nipple (11), pump barrel (12), pump piston (15), travelling valve (16), travelling valve body (20), little screen casing (21) is formed, and feature of the present utility model is: the top in last standing valve (8) is connected to differential pressure compensator, it is by compensator working barrel (1), often open valve cover (2), often open valve (3), compensator piston (4), balance tube (5), hollow connecting rod (6), seal arrangement (7) is formed, and compensator working barrel (1) joins with balance tube (5), and the lower end of balance tube (5) and seal arrangement (7) join, standing valve body (9) joins on the lower end of seal arrangement (7) and the pump, is provided with shunting valve (13) and shunting valve body (14) between the upper end of the lower end of hollow connecting rod (6) and pump piston (15).
2, pressure difference compensation double-action deep-well oil pump according to claim 1 is characterized in that between compensator working barrel (1) and hollow connecting rod (6) compensator piston (4) being housed.
3, pressure difference compensation double-action deep-well oil pump according to claim 1 is characterized in that having equalizing orifice on the tube wall of balance tube (5).
4, pressure difference compensation double-action deep-well oil pump according to claim 1 is characterized in that seal arrangement (7) adopts the unsteady self-styled black box of aligning pressure of multi-clove type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210636 CN2065255U (en) | 1990-02-17 | 1990-02-17 | Pressure-compensated double-action oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210636 CN2065255U (en) | 1990-02-17 | 1990-02-17 | Pressure-compensated double-action oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2065255U true CN2065255U (en) | 1990-11-07 |
Family
ID=4890525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90210636 Withdrawn CN2065255U (en) | 1990-02-17 | 1990-02-17 | Pressure-compensated double-action oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2065255U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325998A (en) * | 2009-02-27 | 2012-01-18 | 丹佛斯商业压缩机公司 | The piston refrigeration compressor |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
| CN107859614A (en) * | 2017-05-02 | 2018-03-30 | 徐景梅 | A kind of device of piston type double-acting deep well pump |
-
1990
- 1990-02-17 CN CN 90210636 patent/CN2065255U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325998A (en) * | 2009-02-27 | 2012-01-18 | 丹佛斯商业压缩机公司 | The piston refrigeration compressor |
| CN107023471A (en) * | 2016-01-31 | 2017-08-08 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant descending power in inclined shaft |
| CN107023471B (en) * | 2016-01-31 | 2018-07-13 | 中国石油化工股份有限公司 | A kind of oil well pump and huge discharge lifting method with constant downlink power in inclined shaft |
| CN107859614A (en) * | 2017-05-02 | 2018-03-30 | 徐景梅 | A kind of device of piston type double-acting deep well pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |