CN201288655Y - Pressure testing downhole oil production screw pump - Google Patents
Pressure testing downhole oil production screw pump Download PDFInfo
- Publication number
- CN201288655Y CN201288655Y CNU2008201731663U CN200820173166U CN201288655Y CN 201288655 Y CN201288655 Y CN 201288655Y CN U2008201731663 U CNU2008201731663 U CN U2008201731663U CN 200820173166 U CN200820173166 U CN 200820173166U CN 201288655 Y CN201288655 Y CN 201288655Y
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- China
- Prior art keywords
- screw pump
- pressure testing
- pump
- oil production
- valve
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- 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 And Applications Of Rotary Liquid Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a pressure testing underground oil production screw pump, comprising a check valve, a screw pump and a pressure test valve, the lower part of a pump upper joint is connected with the upper part of the screw pump, the lower part of the screw pump is connected with the pressure testing valve, the pump upper joint is provided with a side hole with a check valve below, a discharge pipe is parallel mounted outside the screw pump, the upper end of the discharge pipe is connected with the lower part of the check valve, and the upper end of the discharge pipe is connected with the side hole of the pressure test valve. The pressure testing underground oil production screw pump can test pressure for oil production tubing string of the screw pump, and ensure the rotor of the screw pump enter into the stator of the screw pump. By pressure test of the oil production tubing string, the operation rework caused by discharge oil pipe leakage is avoided, the operation quality is ensured, the oil well production halt time 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 downhole oil production 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 downhole oil production 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 has been achieved in that one-way valve, screw pump, pressure testing valve, pump upper connection bottom connects with screw pump top, the screw pump bottom connects with the pressure testing valve, the pump upper connection has side opening, side opening is installed one-way valve down, parallel installation liquid-discharging tube outside screw pump, and the liquid-discharging tube upper end connects with the one-way valve bottom, the liquid-discharging tube upper end connects with pressure testing valve side opening, and liquid-discharging tube is a blank pipe.
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 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 made up of pump upper connection 1, one-way valve 2, screw pump 3, liquid-discharging tube 4, pressure testing valve 5.Pump upper connection 1 bottom connects with screw pump 3 tops, screw pump 3 bottoms connect with pressure testing valve 5, pump upper connection 1 has side opening 6, side opening is installed one-way valve 26 times, parallel installation liquid-discharging tube 4 outside screw pump 3, liquid-discharging tube 4 upper ends connect with one-way valve 2 bottoms, and liquid-discharging tube 4 upper ends connect with pressure testing valve 5 side openings, and liquid-discharging tube 4 is a blank pipe.
During pressure testing, inject highly pressurised liquid in the oil pipe from the pump, thereby the oil pipe on the pressure testing valve 5 is carried out pressure testing, check its sealing.
Fashionable under the rotor of screw pump 3, liquid between the rotor bottom of pressure testing valve 5 and screw pump 3 is in liquid-discharging tube 4 drains into pump upper connection 1, because in a single day the rotor bottom of screw pump 3 enters in the stator of screw pump 3, liquid between the rotor bottom of pressure testing valve 5 and screw pump 3 is incompressible, if there is not discharge route, the rotor of screw pump 3 will be difficult to continue to be lowered to.The effect of one-way valve 2 is to prevent in the production process that crude oil on the pump from flowing backward to the space between pressure testing valve 5 and the screw pump 3, because the crude oil on the pump is the crude oil through screw pump 3 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 5 and the screw pump.
During oil recovery, in the well crude oil through pressure testing valve 5 by the screw pump 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)
- But 1, a kind of pressure testing downhole oil production screw pump, one-way valve (2), screw pump (3), pressure testing valve (5) are arranged, it is characterized in that: pump upper connection (1) bottom connects with screw pump (3) top, screw pump (3) bottom connects with pressure testing valve (5), pump upper connection (1) has side opening (6), side opening (6) is installed one-way valve (2) down, parallel installation liquid-discharging tube (4) outside screw pump (3), liquid-discharging tube (4) upper end connects with one-way valve (2) bottom, liquid-discharging tube (4) upper end connects with pressure testing valve (5) side opening, and liquid-discharging tube (4) is a blank pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201731663U CN201288655Y (en) | 2008-10-15 | 2008-10-15 | Pressure testing downhole oil production screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201731663U CN201288655Y (en) | 2008-10-15 | 2008-10-15 | Pressure testing downhole oil production screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201288655Y true CN201288655Y (en) | 2009-08-12 |
Family
ID=40980337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201731663U Expired - Fee Related CN201288655Y (en) | 2008-10-15 | 2008-10-15 | Pressure testing downhole oil production screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201288655Y (en) |
Cited By (1)
| 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 |
-
2008
- 2008-10-15 CN CNU2008201731663U patent/CN201288655Y/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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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: 20090812 Termination date: 20101015 |