CN201318266Y - Screw pump capable of having pressure test - Google Patents
Screw pump capable of having pressure test Download PDFInfo
- Publication number
- CN201318266Y CN201318266Y CNU2008201732609U CN200820173260U CN201318266Y CN 201318266 Y CN201318266 Y CN 201318266Y CN U2008201732609 U CNU2008201732609 U CN U2008201732609U CN 200820173260 U CN200820173260 U CN 200820173260U CN 201318266 Y CN201318266 Y CN 201318266Y
- Authority
- CN
- China
- Prior art keywords
- screw pump
- pump
- joint
- pressure test
- valve
- 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
Links
- 238000007599 discharging Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000003129 oil well Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 24
- 239000010779 crude oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
Disclosed is a screw pump capable of having pressure test, which comprises a pump joint, a screw pump, a liquid discharge tube, a diversion joint, a discharge valve, a sleeve and a pressure test valve; wherein, the lower part of the pump joint is connected with the upper part of the screw pump; the lower part of the screw pump is connected with the upper part of the diversion joint; the lower large thread of the diversion joint is connected with upper part of the pressure test valve; the lower small thread of the diversion joint is connected with upper part of the discharge valve; the liquid discharge tube is mounted in parallel to the screw pump; a discharge channel and an oil inlet channel are arranged on the diversion joint; the lower part of the liquid discharge tube is connected with the diversion joint 4 and communicated with the discharge channel; the upper part of the liquid discharge tube is connected with the lateral hole of the pump joint and communicated with the interior of the pump joint. The utility model not only can perform pressure test on the flow string of screw pump, but also can ensure the rotor of screw pump to be placed in the stator of screw pump smoothly; the secondary operation caused by oil pipe leakage is prevented due to the pressure test on flow string of screw pump so that the operation quality is guaranteed; the stop time of oil well is short; the production loss is small and the operation cost is low.
Description
Technical field:
The utility model is the screw pump of oil field oil recovery usefulness, but particularly a kind of pressure testing screw pump.
Background technique:
In the screw pump oil production tubing string, one-way valve can not be installed in the screw pump bottom, because if after one-way valve has been installed, the rotor of screw pump is when being lowered to the stator of screw pump, liquid between one-way valve and the rotor bottom can not be discharged, and rotor occurs and can not enter the interior problem of stator smoothly.So, one-way valve can not be installed in the screw pump bottom, and therefore, present screw pump oil production tubing string can not pressure testing, whether can't find oil pipe misses, do not guarantee operation quality, cause adopt behind some screw pump oil production well operations not fuel-displaced, the operation of need doing over again, increase the oil well off-time, increase the activity duration, reduce well oil output, increase operating cost.Chinese patent application: 03263839.6 screw pump oil production tubing string pressure testing device, can be to the pressure testing of screw pump oil production tubing string, but this device must could use with the support type packer assembly is supporting, and the support type packer assembly causes drilling pipe bending easily, causes the oil pipe wearing and tearing.Chinese patent application: 200520087208.8 screw pumps, can be to the pressure testing of screw pump oil production tubing string, but this screw pump needs an outer tube also longer than screw pump, and Master Cost is many.
Summary of the invention:
But the purpose of this utility model is a kind of pressure testing screw pump of design, make it can be to the pressure testing of screw pump oil production tubing string, can guarantee that again screw pump rotor is lowered in the screw pump stator smoothly, by to the pressure testing of screw pump oil production tubing string, the operation that discharge oil pipe leakage in time causes is done over again, guarantee operation quality, reduce the oil well loss.
The purpose of this utility model is achieved in that by the pump upper connection, screw pump, liquid-discharging tube, tap, expulsion valve, sleeve pipe, the pressure testing valve is formed, pump upper connection bottom connects with screw pump top, the screw pump bottom connects with tap top, tap bottom major thread connects with pressure testing valve top, tap bottom minor thread connects with expulsion valve top, the parallel installation of liquid-discharging tube with screw pump, discharge route and oil inlet passage are arranged on the tap, the liquid-discharging tube bottom connects with tap and communicates with discharge route, and liquid-discharging tube top connects with pump upper connection side opening and communicates with its inside.
The beneficial effects of the utility model are: can carry out pressure testing to the screw pump oil production tubing string, can guarantee that again screw pump rotor is lowered in the screw pump stator smoothly, by to the pressure testing of screw pump oil production tubing string, can discharge the operation that oil pipe leakage causes does over again, guarantee operation quality, the oil well off-time is short, and production loss is few, and operating cost is low.
Description of drawings
Accompanying drawing 1 is the utility model embodiment's a erection drawing.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.
Embodiment of the present utility model is by by pump upper connection 1, screw pump 2, liquid-discharging tube 3, tap 4, expulsion valve 5, sleeve pipe 6, pressure testing valve 7 is formed, pump upper connection 1 bottom connects with screw pump 2 tops, screw pump 2 bottoms connect with tap 4 tops, tap 4 bottom major threads connect with pressure testing valve 6 tops, tap 4 bottom minor threads connect with expulsion valve 5 tops, liquid-discharging tube 3 and screw pump 2 parallel installations, discharge route 7 and oil inlet passage 8 are arranged on the tap 4, liquid-discharging tube 3 bottoms connect with tap 4 and communicate with discharge route 7, and liquid-discharging tube 3 tops connect with pump upper connection 1 side opening and communicate with its inside.
During pressure testing, inject highly pressurised liquid in the oil pipe from the pump, thereby the oil pipe on the pressure testing valve 6 is carried out pressure testing, check its sealing.
Fashionable under the rotor of screw pump 2, liquid between the rotor bottom of pressure testing valve 6 and screw pump 2 drains in the pump upper connection 1 through expulsion valve 5, liquid-discharging tube 3, because in a single day the rotor bottom of screw pump 2 enters in the stator of screw pump 2, liquid between the rotor bottom of pressure testing valve 6 and screw pump 2 is incompressible, if there is not discharge route, the rotor of screw pump 3 can't continue to be lowered to.The effect of expulsion valve 5 is to prevent in the production process that crude oil on the pump from flowing backward to the space between pressure testing valve 6 and the screw pump 2, because the crude oil on the pump is the crude oil through screw pump 2 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 6 and the screw pump 2.
During oil recovery, in the well crude oil through pressure testing valve 6, oil inlet passage 8 by screw pump 2 extraction.
The utility model can only be 7 " use in the sleeve pipe,, can not descend in small casing because after the external parallel of pump was installed liquid-discharging tube, the profile of pump increased, because present 7 " cased well is a lot, so the utility model has bigger Applicable scope.
Claims (1)
1, but a kind of pressure testing screw pump, by pump upper connection (1), screw pump (2), liquid-discharging tube (3), tap (4), expulsion valve (5), sleeve pipe (6), pressure testing valve (7) is formed, it is characterized in that: pump upper connection (1) bottom connects with screw pump (2) top, screw pump (2) bottom connects with tap (4) top, tap (4) bottom major thread connects with pressure testing valve (6) top, tap (4) bottom minor thread connects with expulsion valve (5) top, liquid-discharging tube (3) and the parallel installation of screw pump (2), discharge route (7) and oil inlet passage (8) are arranged on the tap (4), liquid-discharging tube (3) bottom connects with tap (4) and communicates with discharge route (7), and liquid-discharging tube (3) top connects with pump upper connection (1) side opening and communicates with its inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201732609U CN201318266Y (en) | 2008-10-20 | 2008-10-20 | Screw pump capable of having pressure test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201732609U CN201318266Y (en) | 2008-10-20 | 2008-10-20 | Screw pump capable of having pressure test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201318266Y true CN201318266Y (en) | 2009-09-30 |
Family
ID=41197031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201732609U Expired - Fee Related CN201318266Y (en) | 2008-10-20 | 2008-10-20 | Screw pump capable of having pressure test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201318266Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138927A (en) * | 2018-08-01 | 2019-01-04 | 中国石油天然气股份有限公司 | One-way switch, screw pump string and method for preventing jamming when opening well |
-
2008
- 2008-10-20 CN CNU2008201732609U patent/CN201318266Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138927A (en) * | 2018-08-01 | 2019-01-04 | 中国石油天然气股份有限公司 | One-way switch, screw pump string and method for preventing jamming when opening 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: 20090930 Termination date: 20101020 |