CN2816415Y - Screw pump - Google Patents
Screw pump Download PDFInfo
- Publication number
- CN2816415Y CN2816415Y CN 200520087208 CN200520087208U CN2816415Y CN 2816415 Y CN2816415 Y CN 2816415Y CN 200520087208 CN200520087208 CN 200520087208 CN 200520087208 U CN200520087208 U CN 200520087208U CN 2816415 Y CN2816415 Y CN 2816415Y
- Authority
- CN
- China
- Prior art keywords
- desilting
- sand
- joint
- oil
- well
- 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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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a screw rod pump for oil extraction of oil fields, which is composed of a desilting barrel, a screw rod pump, a partial flow joint, a valve for well washing and pressure division, a pressure test valve and a desilting joint, wherein the screw rod pump is arranged in the desilting barrel, and the lower part of the screw rod pump is provided with a partial flow joint, the valve for well washing and pressure division, the pressure test valve and the desilting joint. The lower part of the desilting barrel and the upper part of the desilting joint are connected by a big thread, and the lower part of the desilting joint is connected with a desilting tail pipe. When pressure is tested, the pressure test valve is closed and thus the sealability of an oil pipe on the pump is inspected. When oil is extracted, crude oil in a well enters from an oil inlet passage of the desilting joint and is extracted by the screw rod pump through the pressure test valve. When the well is stopped working because of reasons and sand on the pump is sank, the sand is sank into the desilting tail pipe below the pump through a desilting passage of the desilting joint from annular space between the desilting barrel and the screw rod pump. When the well is washed, well washing water enters the annular space between the desilting barrel and the screw rod pump to the oil pipe on the screw rod pump from the outside of the desilting barrel downwards through the oil inlet passage of the desilting joint, the pressure test valve and the valve for well washing and pressure division, and then is returned out of the ground and thus the purpose of well washing can be achieved.
Description
One, technical field
The utility model is a kind of pumping unit that oil field machinery oil is used, particularly a kind of screw pump.Belong to engineering goods.
Two, background technique
Shake out screw pump oil production well after stopping well for some reason, and sand sinks, and buries dead screw rod and sucker rod, causes stuck screw rod, can not drive a well again, needs operation to propose to be lowered to new screw pump again behind whole extracting device of oil and just can resume production, and causes very big economic loss.The on-the-spot screw pump that uses all is solid, and the cored screw pump is difficult to processing, so, descended the oil well behind the screw pump can not well-flushing, the screw pump oil production well ordinary production time that makes is short, needs frequent operation maintenance, and the oil recovery well benefit is low, the maintenance cost height.
Three, summary of the invention
The purpose of this utility model is a kind of screw pump of design, make it when the oil recovery well that shakes out uses, stop well for some reason after sand sink, do not bury screw rod and sucker rod, increase the oil well operating time, reduce operating cost.
The purpose of this utility model is achieved in that by sand-precipitating tube, screw pump, sand-precipitating joint to be formed, and screw pump is in the sand-precipitating tube, and sand-precipitating joint is arranged at the screw pump bottom, and the sand-precipitating tube bottom connects with sand-precipitating joint top major thread.Tap top connects with screw pump, and tap bottom minor thread connects every the pressure valve with well-flushing.Tap bottom major thread connects with pressure testing valve top, and pressure testing valve bottom connects with sand-precipitating joint top.Screw pump is made up of stator and screw rod.
The pressure testing valve is unidirectional, and liquid can upwards enter from the bottom, can not flow out downwards from top, its effect is the oil pipe on the airtight pressure testing valve, can guarantee that oil pipe reaches requirement of withstand voltage on the pump to oil pipe pressure testing on the pump after making in its this pump lower going-into-well, get rid of the influence of oil pipe leakage this pump work.When oil pipe is new oil pipe, or on ground through newly delivering to on-the-spot oil pipe after the pressure testing, can not need after going into the well on the pump during oil pipe pressure testing, the pressure testing valve can not installed.
Well-flushing is the effect that produces the well-flushing passage every pressing valve on the one hand, be the effect that when making screw rod be lowered in the pump liquid between pressure testing valve and the screw rod bottom is drained into sand-precipitating tube on the other hand, because after in a single day the screw rod bottom of screw pump enters the stator of screw pump, liquid between pressure testing valve and the screw rod bottom is incompressible, if there is not discharge route, screw rod will be difficult to continue to be lowered to, be to prevent that in process of production the interior crude oil of sand-precipitating tube from flowing backward to the space between pressure testing valve and the screw rod more on the one hand, because the crude oil in the sand-precipitating tube is the crude oil through the screw pump extraction, if will lost units, even can cause not produce oil of oil well so flow backward to behind the space between pressure testing valve and the screw rod.
Sand-precipitating joint plays sand setting and oil-feed, inside is provided with oil inlet passage and sand setting passage, oil inlet passage and stratum UNICOM so that the crude oil in the stratum enter in the pump, the sand setting tail pipe of sand setting passage UNICOM's sand-precipitating tube and sand-precipitating joint bottom, sand in the sand-precipitating tube is sunk in the sand setting tail pipe under it, and shut sand setting tail pipe bottom.Oil inlet passage and sand setting passage also can make oil inlet passage and the sand setting passage in the patent No. 02230155.0 sand control card oil well pump into, and two kinds of passages are similar effects, but the latter is superior not as the former.
During pressure testing, inject highly pressurised liquid in the oil pipe from the pump, thereby the oil pipe on the pressure testing valve is carried out pressure testing, check its sealing.During oil recovery, crude oil enters from the oil inlet passage of sand-precipitating joint in the well, by the screw pump extraction, when stopping on the well pump sand for some reason when sinking, sand sinks under the pump in the sand setting tail pipe through the sand setting passage of sand-precipitating joint from the annular space between sand-precipitating tube and the screw pump through the pressure testing valve.During well-flushing, well-flushing water outside sand-precipitating tube downwards through the oil inlet passage of sand-precipitating joint, pressure testing valve, well-flushing every pressing valve, return out ground after entering the oil pipe of annular space to the screw pump between sand-precipitating tube and the screw pump, thereby realize the purpose of well-flushing.
The beneficial effects of the utility model are, sand can sink down in the tail pipe after sand output well stopped well for some reason, sand can not bury screw rod and sucker rod, can not cause the sand holddown and operation, the utility model can also satisfy the requirement of well-flushing, makes oil recovery well ordinary production for a long time, increases the oil well operating time, reduce operating cost, have remarkable economic efficiency.
Four, description of drawings
Accompanying drawing is the utility model embodiment's a erection drawing.
Five, embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described.
Among the figure: the 1st, sand-precipitating tube, the 2nd, screw pump, the 3rd, tap, the 4th, every pressing flushing valve, the 5th, pressure testing valve, the 6th, sand-precipitating joint.Be that the utility model is made up of every pressure valve 4, pressure testing valve 5, sand-precipitating joint 6 sand-precipitating tube 1, screw pump 2, tap 3, well-flushing.Screw pump 2 is in the sand-precipitating tube 1, and there are tap 3, well-flushing in screw pump 2 bottoms every pressing valve 4, pressure testing valve 5, sand-precipitating joint 6, and sand-precipitating tube 1 bottom connects with sand-precipitating joint 6 top major threads, and sand-precipitating joint 6 bottoms connect with the sand setting tail pipe.Tap 3 tops connect with screw pump 2, and tap 3 bottom minor threads connect every pressure valve 4 with well-flushing, and tap 3 bottom major threads connect with pressure testing valve 5 tops, and pressure testing valve 5 bottoms connect with sand-precipitating joint 6 top minor threads.Screw pump 2 is made up of stator and screw rod.
Claims (3)
1, a kind of screw pump, form by sand-precipitating tube (1), screw pump (2), sand-precipitating joint (6), it is characterized in that: screw pump (2) is in the sand-precipitating tube (1), and sand-precipitating joint (6) is arranged at screw pump (2) bottom, and sand-precipitating tube (1) bottom connects with sand-precipitating joint (6) top major thread.
2, screw pump according to claim 1 is characterized in that: tap (3) top connects with screw pump (2), and tap (3) bottom minor thread connects every pressure valve (4) with well-flushing.
3, screw pump according to claim 1 is characterized in that: tap (3) bottom major thread connects with pressure testing valve (5) top, and pressure testing valve (5) bottom connects with sand-precipitating joint (6) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087208 CN2816415Y (en) | 2005-09-05 | 2005-09-05 | Screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087208 CN2816415Y (en) | 2005-09-05 | 2005-09-05 | Screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2816415Y true CN2816415Y (en) | 2006-09-13 |
Family
ID=36996224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087208 Expired - Fee Related CN2816415Y (en) | 2005-09-05 | 2005-09-05 | Screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2816415Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382131B (en) * | 2008-10-15 | 2010-06-16 | 马子奇 | Pressure testing downhole oil production screw pump |
| CN101718193B (en) * | 2009-12-15 | 2012-09-26 | 中国石油集团长城钻探工程有限公司 | Method for prolonging service life of screw pump by adding water into casing sleeve of heavy oil well |
-
2005
- 2005-09-05 CN CN 200520087208 patent/CN2816415Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382131B (en) * | 2008-10-15 | 2010-06-16 | 马子奇 | Pressure testing downhole oil production screw pump |
| CN101718193B (en) * | 2009-12-15 | 2012-09-26 | 中国石油集团长城钻探工程有限公司 | Method for prolonging service life of screw pump by adding water into casing sleeve of heavy oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060913 |