CN217683320U - Sliding valve for screw pump - Google Patents
Sliding valve for screw pump Download PDFInfo
- Publication number
- CN217683320U CN217683320U CN202222024026.2U CN202222024026U CN217683320U CN 217683320 U CN217683320 U CN 217683320U CN 202222024026 U CN202222024026 U CN 202222024026U CN 217683320 U CN217683320 U CN 217683320U
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- valve
- screw pump
- sliding
- sliding valve
- hole
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Abstract
The utility model relates to a screw pump, especially a slide valve for screw pump, include: the two ends of the sliding valve rod are respectively connected with the sucker rod and the rotor; the top of the outer sleeve is connected with an oil pipe; the valve seat is provided with a valve hole and is inserted into the outer sleeve, the bottom of the valve seat is fixed at the bottom of the outer sleeve, and the sliding valve rod is positioned in the valve hole; and the valve core hole of the sliding valve core is movably inserted on the sliding valve rod and is positioned above the valve seat, the sliding valve core moves upwards to open the valve hole through the pressure difference generated by the screw pump, and the sliding valve seat closes the valve hole through the pressure and gravity of fluid falling back when the screw pump is stopped. This slide valve guarantees to have enough annular space and annotates that the steam passageway is smooth, lifts the rotor and leaves the pump barrel and can realize annotating the steam operation, transfers the rotor post to the assigned position and can normally open the pump, realizes annotating and adopts integrative function.
Description
Technical Field
The utility model relates to a screw pump, especially a slide valve for screw pump.
Background
With the continuous popularization of new artificial lifting modes and novel lifting products, the screw type heavy oil pump has the advantages of continuous solid particle processing capacity, continuous lifting, high efficiency, obvious energy-saving effect and the like, is favored by vast oilfield units, but because the screw pumps mostly adopt rubber lining stators, the screw pumps cannot be used in high-temperature and high-pressure working condition oil wells, and the application range of the screw pumps is limited. In recent years, with continuous innovation of processing technology and precision, the proposed lifting mode of the underground rigid stator screw pump breaks through the application range limitation of the conventional screw pump, particularly has more outstanding application advantages gradually obtained in the working condition of a heavy oil thermal recovery process oil well, but some problems need to be solved urgently in the use process, for example, when the oil well is shut down accidentally, the pumping rod reverses at a high speed due to the fact that fluid in an oil pipe column falls back, after the high-water-content sand-containing oil well is shut down, a large amount of sand-containing fluid in the oil pipe falls back into a pump cylinder and cannot be discharged to cause a pump clamp, although the problems also have some solutions at present, the problems are basically solved by adopting a measure of separating or filtering the sand-containing fluid at a pump inlet, the problems of incomplete filtering and separation and frequent sieve pipe blockage are solved, the problem of the blockage of the underground sieve pipe through a well washing process measure is needed, and the production process cost of the oil field is greatly increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a can guarantee to annotate the steam effect, can realize the oil pumping simultaneously to can reduce accident probability, reduce a slide valve for screw pump of maintenance cost, concrete technical scheme is:
a slide valve for a screw pump, comprising: the two ends of the sliding valve rod are respectively connected with the sucker rod and the rotor; the top of the outer sleeve is connected with an oil pipe; the valve seat is provided with a valve hole, the valve seat is inserted into the outer sleeve, the bottom of the valve seat is fixed at the bottom of the outer sleeve, and the sliding valve rod is positioned in the valve hole; and the valve core hole of the sliding valve core is movably inserted on the sliding valve rod and is positioned above the valve seat, the sliding valve core moves upwards to the pressure difference generated by the screw pump to open the valve hole, and the sliding valve seat closes the valve hole by the pressure and gravity of fluid falling back when the screw pump stops.
Preferably, one end of the sliding valve core, which is opposite to the valve hole, is provided with a conical sealing surface, and the conical sealing surface is inserted into the valve hole.
And the other end of the sliding valve core is also provided with the conical sealing surface.
Preferably, the valve core hole is circular arc-shaped.
Preferably, the method further comprises the following steps: and the upper coupling is connected with the sucker rod and the top of the sliding valve rod respectively.
Preferably, the oil pipe further comprises an outer collar, and the outer collar is connected with the oil pipe and the outer sleeve respectively.
Preferably, the valve further comprises a lower coupling which is respectively connected with the bottom of the sliding valve rod and the top of the rotor.
Compared with the prior art the utility model discloses following beneficial effect has:
the sliding valve for the screw pump provided by the utility model ensures enough annular space to smoothly inject steam, the rotor is lifted up to leave the pump barrel to realize steam injection operation, and the pumping can be normally started by lowering the rotor pole to a designated position to realize the injection and extraction integrated function; the pumping unit can be normally opened in the normal pumping-on process to ensure that underground fluid is smoothly pumped to the ground, and can close the inlet of the screw pump when the pumping unit is shut down, so that the high-speed reverse rotation speed of the sucker rod string caused by the influence of the fall-back of fluid in an oil pipe is reduced, and the pump jamming accident caused by the sand particles in the fluid entering the screw pump stator to be blocked is prevented; the risk of personal safety caused by high-speed reversal of the sucker rod during daily shutdown and accidental shutdown is reduced, the accident probability of underground equipment is reduced, and the later-stage production cost and the later-stage maintenance cost of the pump clamp are reduced.
Drawings
FIG. 1 is a schematic view of a slide valve for a screw pump;
fig. 2 is a schematic structural view of the spool.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, a sliding valve for a screw pump includes: the valve comprises a sliding valve rod 1, a valve seat 3, a sliding valve core 2, an outer collar 61, an upper collar 62 and a lower collar 63.
Sliding valve rod 1 is the round bar, and sliding valve rod 1's upper and lower both ends all are equipped with the oil rod screw thread, and what have the step joint wherein is the lower extreme, and the upper end screw thread is connected with sucker rod 7 through last coupling 62, and the lower extreme is connected with the top of bimetallic screw pump 52's rotor 51 through lower coupling 63.
The sliding valve core 2 is cylindrical, a valve core hole 21 is arranged in the middle, and the valve core hole 21 is inserted on the sliding valve rod 1 in a sliding mode. The valve core hole 21 is circular arc-shaped, which can reduce the contact area, so that the sliding valve core 2 can slide smoothly on the sliding valve rod 1. The two ends of the sliding valve core 2 are provided with conical sealing surfaces 22.
The top of the outer casing 4 is connected to the tubing 8 by an outer collar 61, the sucker rod 7 is located within the tubing 8 and an upper collar 62 is located at the outer collar 61.
The valve seat 3 is provided with a valve hole 31, the valve seat 3 is a stepped hollow shaft, the valve seat 3 is inserted into the outer sleeve 4, the bottom of the valve seat 3 is fixed at the bottom of the outer sleeve 4, the sliding valve rod 1 is positioned in the valve hole 31, and the sliding valve core 2 is positioned above the valve hole 31. The bottom of the valve seat 3 is connected with a bottom coupling 65 through a nipple 64, the bottom coupling 65 is connected with the top of the screw pump 52, and the rotor 51 is installed in the screw pump 52.
The valve core hole 21 of the sliding valve core 2 is movably inserted on the sliding valve rod 1 and is positioned above the valve seat 3, the sliding valve core 2 moves upwards to open the valve hole 31 through the pressure difference generated by the screw pump 52, and the sliding valve seat 3 closes the valve hole 31 through gravity when the screw pump 52 is stopped.
The slide valve is arranged at the upper outlet end of a bimetallic screw pump of the whole oil pumping pipe column, is designed to be normally closed when the oil pumping pipe column is shut down, when a rotor 51 of the bimetallic screw pump 52 runs normally, the slide valve core 2 moves upwards by utilizing the pressure difference generated when the screw pump 52 works, and the slide valve core 2 is opened to ensure that downhole fluid is smoothly pumped to the ground through an oil pipe 8. When the machine is stopped accidentally, under the combined action of the fluid falling pressure in the oil pipe 8 and the self weight, the conical sealing surface 22 of the sliding valve core 2 is inserted into the valve hole 31 to close the stator inlet of the screw pump 52, so that the potential safety hazard caused by overlarge reversing torque of the high-speed rotating sucker rod 7 of the sucker rod 7 column due to the fact that the medium drives the rotor 51 of the screw pump 52 in a backflow mode and the pump blockage accident risk caused by the fact that sand in the fluid flows back into the pump cylinder are prevented.
The technical principle of the present invention has been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the claims of the present invention.
Claims (7)
1. A sliding valve for a screw pump, comprising:
the two ends of the sliding valve rod (1) are respectively connected with the sucker rod (7) and the rotor (51);
the top of the outer sleeve (4) is connected with an oil pipe (8);
the valve seat (3), the valve hole (31) is arranged on the valve seat (3), the valve seat (3) is inserted into the outer sleeve (4), the bottom of the valve seat (3) is fixed at the bottom of the outer sleeve (4), and the sliding valve rod (1) is positioned in the valve hole (31); and
the sliding valve comprises a sliding valve core (2), a valve core hole (21) of the sliding valve core (2) is movably inserted in the sliding valve rod (1) and is located above a valve seat (3), the sliding valve core (2) moves upwards to open the valve hole (31) through pressure difference generated by a screw pump (52), and the sliding valve core (2) closes the valve hole (31) through pressure and gravity of fluid falling when the screw pump (52) is shut down.
2. A sliding valve for a screw pump according to claim 1, wherein an end of the sliding spool (2) opposite to the valve hole (31) is provided with a conical sealing surface (22), and the conical sealing surface (22) is inserted in the valve hole (31).
3. A sliding valve for a screw pump according to claim 2, characterised in that the other end of the sliding spool (2) is also provided with the conical sealing surface (22).
4. A sliding valve for a screw pump according to claim 1, wherein the spool hole (21) is circular arc-shaped.
5. A sliding valve for a screw pump according to any one of claims 1 to 4, further comprising: and the upper coupling (62), and the upper coupling (62) is respectively connected with the top of the sucker rod (7) and the top of the sliding valve rod (1).
6. A sliding valve for a screw pump according to any one of claims 1 to 4, further comprising an outer collar (61), the outer collar (61) being connected to the tubing (8) and the outer casing (4) respectively.
7. A sliding valve for a screw pump according to any one of claims 1 to 4, further comprising a lower collar (63), the lower collar (63) being connected to the bottom of the sliding valve stem (1) and the top of the rotor (51), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024026.2U CN217683320U (en) | 2022-08-02 | 2022-08-02 | Sliding valve for screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222024026.2U CN217683320U (en) | 2022-08-02 | 2022-08-02 | Sliding valve for screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217683320U true CN217683320U (en) | 2022-10-28 |
Family
ID=83720109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222024026.2U Active CN217683320U (en) | 2022-08-02 | 2022-08-02 | Sliding valve for screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217683320U (en) |
-
2022
- 2022-08-02 CN CN202222024026.2U patent/CN217683320U/en active Active
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