CN215890401U - Upper and lower double-lock rod type oil well pump - Google Patents
Upper and lower double-lock rod type oil well pump Download PDFInfo
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- CN215890401U CN215890401U CN202220095123.8U CN202220095123U CN215890401U CN 215890401 U CN215890401 U CN 215890401U CN 202220095123 U CN202220095123 U CN 202220095123U CN 215890401 U CN215890401 U CN 215890401U
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Abstract
The utility model discloses an upper and lower double-locking rod type oil well pump, which relates to the technical field of rod type oil well pumps and comprises an outer working cylinder and a pump body, wherein the pump body comprises a pump cylinder assembly and a plunger assembly; the plunger assembly also comprises a valve rod upper locking cap and a valve rod lower locking cap, wherein the inner surfaces of the valve rod upper locking cap and the valve rod lower locking cap are respectively provided with an inclined inner cone; the lower end of the lower sealing joint is connected with a normally open valve; the valve rod, the valve rod joint and the valve cover on the plunger are tightly locked together at the threaded connection part at the two ends of the valve rod through the locking cap, so that the valve rod is prevented from being broken; the structure of locking and sealing up and down improves the stress condition of the pump barrel, and the pump barrel can not extend due to the action of the liquid column, thus achieving the purpose of deep well oil pumping.
Description
Technical Field
The utility model relates to the technical field of rod-type oil-well pumps, in particular to an upper and lower double-locking rod-type oil-well pump.
Background
In order to recover oil from the stratum, mechanical equipment is used to lift the crude oil in the well to the ground in the oil recovery process, an oil well pump is a main oil recovery device, and a rod oil pump is one of the oil well pumps. Compared with a tubular oil pump, the rod-type oil pump has the characteristics of no need of lifting an oil pipe when the pump is lifted, easiness in pump inspection operation and short operation time, and can greatly save the operation cost.
Commonly used rod pumps include fixed-barrel top-fixed rod pumps and fixed-barrel bottom-fixed rod pumps. The fixed cylinder type top fixed rod pump has the advantages that the top is fixed, and the pump cylinder is stressed by the composite load of internal pressure and downward stretching of a liquid column, so that the stress condition is severe; when pumping oil, the internal pressure of the pump barrel is higher than the external pressure, the inner hole of the pump barrel is increased, and the leakage is increased. The fixed cylinder type bottom fixed rod pump is fixed at the bottom, and the pump cylinder is suspended in the air, so that the pump cylinder is better in stress condition and suitable for deep wells and medium-deep wells, but sand grains are easy to deposit in annular spaces of a fixed support sleeve and a bottom locking device, and the pump lifting operation is difficult; the bottom is fixed, and the pump barrel swings greatly during operation, so that the abrasion of the valve rod and the guide sleeve is also aggravated.
In order to better use the rod pump, various research units and individuals have developed various special rod pumps, for example, chinese patent CN207513808U discloses a displacement rod type air-proof pump, which adopts a bottom fixed rod type pump structure, and forms a displacement cavity of an air-proof lock by connecting an outer tube and an upper sealing cylinder with the upper and lower seals of the rod pump through a bottom pump seat. The pump can effectively reduce the gas-liquid ratio of crude oil and prevent air lock.
However, because the rod pump seat is firstly put into the oil well along with the oil pipe, the pressure test needs to be carried out on the oil pipe column at the moment, and the rod pump can be put into the oil pipe column after the oil pipe column is verified to be qualified. In addition, the valve rod of the rod pump is thin and long, and is easy to bend in the oil pumping process, particularly the upper dead point is too deep and too long, and particularly the tail part of the thread of the valve rod is broken, so that the valve rod is a dangerous area.
Therefore, the rod pump has the problems that an oil pipe column cannot be tested in a pressure test mode and a valve rod is easy to break in the application process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an oil well pump with an upper lock rod and a lower lock rod aiming at the defects in the prior art.
The technical scheme of the utility model is as follows: an upper and lower double-locking-rod type oil well pump comprises an outer working barrel and a pump body, wherein the outer working barrel comprises an upper sealing joint, a connecting pipe and a lower sealing joint which are fixedly connected in sequence from top to bottom; the plunger assembly further comprises a valve rod upper locking cap and a valve rod lower locking cap, wherein the inner surfaces of the valve rod upper locking cap and the valve rod lower locking cap are respectively provided with an inclined inner cone, the valve rod joint is in threaded connection with the valve rod upper locking cap through a slotted inclined outer cone arranged at the lower end of the valve rod joint, and the upper valve plunger valve cover is in threaded connection with the valve rod lower locking cap through a slotted inclined outer cone arranged at the upper end of the upper valve plunger valve cover; the lower end of the lower sealing joint is connected with a normally open valve.
Preferably, the normally open valve comprises a valve body and a valve ball, a valve seat is arranged at the bottom of an inner cavity of the valve body, and a top plate is arranged at the top of the inner cavity of the valve body; the top plate is provided with a magnetic block and a plurality of liquid flow holes, and the valve ball is movably arranged in the inner cavity of the valve body between the top plate and the valve seat.
Preferably, the upper end of the valve rod connector is connected with a centralizer, and the maximum outer diameter of the centralizer is slightly smaller than the inner diameter of the oil pipe.
Preferably, the outer wall of the top sealing support is nested with a plurality of sealing rings.
Preferably, the upper end of the top sealing support is provided with a valve rod guide sleeve, and the valve rod is arranged in the valve rod guide sleeve in a vertically sliding mode.
Preferably, an outer frustum is arranged on the outer wall of the locking connector, an inner frustum matched with the outer frustum is arranged on the inner wall of the lower sealing connector, and the outer frustum of the locking connector is in contact with the inner frustum of the lower sealing connector to form taper sealing.
Compared with the prior art, the utility model has the following advantages:
the upper and lower double-lock sealing structure can well center and fix the pump barrel, so that the problems of serious abrasion of the valve rod and the valve rod guide sleeve and sealing failure caused by large swing of the pump barrel in the oil pumping process are solved; the valve rod, the valve rod joint and the valve cover on the plunger are tightly locked together at the threaded connection part at the two ends of the valve rod through the locking cap, so that the threads of the valve rod are protected, and the valve rod is prevented from being broken; the structure of locking and sealing up and down improves the stress condition of the pump barrel, the pump barrel can not extend due to the action of the liquid column, so the pump barrel can be used in a deep well to achieve the purpose of deep well oil pumping; the sealing structure is locked up and down, so that the sealing performance of the device is improved, and the oil well pump is safer and more reliable; the normally open valve under the pump can realize the pressure test of the tubing string before the pump is put down, thereby ensuring the quality of operation and construction.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of the upper half of the present invention;
fig. 3 is a lower half structure diagram of the present invention.
In the figure: 1. the sealing device comprises an upper sealing joint, 2, a connecting pipe, 3, a lower sealing joint, 301, an inner frustum, 4, a top sealing support, 401, a valve rod guide sleeve, 5, a pump cylinder, 6, a locking joint, 601, an outer frustum, 7, a valve rod joint, 8, a valve rod, 9, a plunger upper valve cover, 10, a plunger, 11, a valve rod upper locking cap, 12, a valve rod lower locking cap, 13, a valve body, 14, a valve ball, 15, a magnetic block, 16, a centralizer, 17 and a sealing ring.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
Example one
Referring to fig. 1-3, an up-down double-locking rod type oil well pump comprises an external working barrel and a pump body, wherein the external working barrel comprises an upper sealing joint 1, a connecting pipe 2 and a lower sealing joint 3 which are fixedly connected in sequence from top to bottom, the pump body comprises a pump barrel assembly and a plunger assembly, the pump barrel assembly comprises a top sealing support 4, a pump barrel 5 and a locking joint 6 which are fixedly connected in sequence from top to bottom, the plunger assembly comprises a valve rod joint 7, a valve rod 8, an upper plunger valve cover 9 and a plunger 10 which are fixedly connected in sequence from top to bottom, the plunger assembly is arranged in the pump barrel assembly in a vertical sliding manner, the pump barrel assembly is inserted in the external working barrel, the locking joint 6 is detachably inserted in the lower sealing joint 3, and the top sealing support 4 is inserted in the upper sealing joint 1 in a sealing manner; the plunger assembly also comprises a valve rod upper locking cap 11 and a valve rod lower locking cap 12, wherein the inner surfaces of the valve rod upper locking cap 11 and the valve rod lower locking cap 12 are respectively provided with an inclined inner cone, the valve rod joint 7 is in threaded connection with the valve rod upper locking cap 11 through a slotted inclined outer cone arranged at the lower end, and when the valve rod upper locking cap 11 is in threaded connection with the valve rod joint 7, the inclined outer cone of the valve rod joint 7 is inwards contracted through the inclined inner cone of the valve rod upper locking cap 11, so that the valve rod joint 7 is tightly locked on the valve rod 8; the upper plunger valve bonnet 9 is in threaded connection with the lower valve rod locking cap 12 through a slotted inclined outer cone arranged at the upper end, and when the lower valve rod locking cap 12 is in threaded connection with the upper plunger valve bonnet 9, the inclined outer cone of the upper plunger valve bonnet 9 is contracted inwards by the inclined inner cone of the lower valve rod locking cap 12, so that the upper plunger valve bonnet 9 is tightly locked on the valve rod 8; this protects the threads of the valve stem 8 well and prevents breakage of the valve stem 8.
The lower end of the lower sealing joint 3 is connected with a normally open valve, the normally open valve comprises a valve body 13 and a valve ball 14, the bottom of the inner cavity of the valve body 13 is provided with a valve seat, and the top of the inner cavity of the valve body is provided with a top plate; the top plate is provided with a magnetic block 15 and a plurality of liquid flow holes, and a valve ball 14 is movably arranged in the inner cavity of the valve body 13 between the top plate and the valve seat.
In order to improve the sealing performance between the top sealing support 4 and the upper sealing joint 1, a plurality of sealing rings 17 are nested on the outer wall of the top sealing support 4; in addition, the upper end of the top seal support 4 is provided with a valve rod guide sleeve 401, and the valve rod 8 is slidably disposed in the valve rod guide sleeve 401 up and down.
When in use, the outer working barrel is put into a preset position of an oil well along with an oil pipe; at the moment, pressure test is carried out from the wellhead, and the liquid flow can wash the valve ball 14 to fall on the valve seat, so that pressure test of the oil pipe column can be realized. After the pressure test of the pipe column is qualified, the pump body is connected with the sucker rod, and goes down along with the sucker rod, and after the sucker rod reaches the position of the outer working barrel, under the action of the weight of the sucker rod, the lower clamping jaw of the locking joint 6 enters the lower part of the lower sealing joint 3, and is sealed and locked; the top sealing support 4 enters the upper sealing joint 1 for sealing, so that the upper and lower double-locking sealing of the device is realized. During oil pumping, crude oil flows into the oil pump from the bottom of the well upwards, at the moment, a valve ball 14 of a normally open valve moves upwards and is sucked by a magnetic block 15, and the oil pumping process is always in a normally open state.
When the oil pump needs to be replaced, the whole pump body can be lifted up by lifting the sucker rod. At the moment, the well head can be pressed again to test the sealing performance of the oil pipe column. And after the rod pump is overhauled, a new pump body with the same specification and model is put in again or put in again.
The upper and lower double-locking sealing structure can well center and fix the pump barrel 5, so that the problems of serious abrasion and sealing failure of the valve rod 8 and the valve rod guide sleeve 401 caused by large swing of the pump barrel 5 in the oil pumping process are solved; the valve rod 8, the valve rod joint 7 and the upper plunger valve bonnet 9 are tightly locked together at the threaded connection part at the two ends of the valve rod 8 through a locking cap, so that the threads of the valve rod 8 are protected, and the valve rod 8 is prevented from being broken; the structure of locking and sealing up and down improves the stress condition of the pump barrel 5, the pump barrel 5 can not extend due to the action of the liquid column, so the pump barrel can be used in a deep well to achieve the purpose of pumping oil from the deep well; the sealing structure is locked up and down, so that the sealing performance of the device is improved, and the oil well pump is safer and more reliable; the normally open valve under the pump can realize the pressure test of the tubing string before the pump is put down, thereby ensuring the quality of operation and construction.
Example two
As a preferred embodiment of the present invention, in the present embodiment, on the basis of the first embodiment, a centralizer 16 is additionally arranged on the valve stem joint 7, specifically:
in this embodiment, a centralizer 16 is connected to the upper end of the valve stem joint 7, and the maximum outer diameter of the centralizer 16 is slightly smaller than the inner diameter of the oil pipe.
The centralizer 16 is connected sucker rod and valve rod joint 7, and in the oil pumping reciprocating motion's in-process, the centralizer 16 has further set right valve rod 8, has reduced the swing of valve rod 8, has further avoided the fracture of valve rod 8.
EXAMPLE III
As a preferred embodiment of the present invention, the present embodiment optimizes the sealing structure of the locking joint 6 and the lower sealing joint 3 on the basis of the second embodiment, specifically:
referring to fig. 3, an outer frustum 601 is arranged on the outer wall of the locking joint 6, an inner frustum 301 matched with the outer frustum 601 is arranged on the inner wall of the lower sealing joint 3, and the outer frustum 601 of the locking joint 6 is in contact with the inner frustum 301 of the lower sealing joint 3 to form taper sealing; this arrangement further improves the sealing performance between the locking joint 6 and the lower sealing joint 3, thus ensuring the sealing of the device to be safer and more reliable.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (6)
1. An upper and lower double-locking-rod type oil well pump comprises an outer working barrel and a pump body, wherein the outer working barrel comprises an upper sealing joint, a connecting pipe and a lower sealing joint which are fixedly connected in sequence from top to bottom; the method is characterized in that: the plunger assembly further comprises a valve rod upper locking cap and a valve rod lower locking cap, wherein the inner surfaces of the valve rod upper locking cap and the valve rod lower locking cap are respectively provided with an inclined inner cone, the valve rod joint is in threaded connection with the valve rod upper locking cap through a slotted inclined outer cone arranged at the lower end of the valve rod joint, and the upper valve plunger valve cover is in threaded connection with the valve rod lower locking cap through a slotted inclined outer cone arranged at the upper end of the upper valve plunger valve cover; the lower end of the lower sealing joint is connected with a normally open valve.
2. The upper and lower double-lock rod type oil well pump according to claim 1, characterized in that: the normally open valve comprises a valve body and a valve ball, a valve seat is arranged at the bottom of an inner cavity of the valve body, and a top plate is arranged at the top of the inner cavity of the valve body; the top plate is provided with a magnetic block and a plurality of liquid flow holes, and the valve ball is movably arranged in the inner cavity of the valve body between the top plate and the valve seat.
3. The upper and lower double-lock rod type oil well pump according to claim 1, characterized in that: the upper end of the valve rod connector is connected with a centralizer, and the maximum outer diameter of the centralizer is slightly smaller than the inner diameter of the oil pipe.
4. The upper and lower double-lock rod type oil well pump according to claim 1, characterized in that: and a plurality of sealing rings are nested on the outer wall of the top sealing support.
5. The upper and lower double-lock rod type oil well pump according to claim 1, characterized in that: and the upper end of the top sealing support is provided with a valve rod guide sleeve, and the valve rod is arranged in the valve rod guide sleeve in a vertical sliding manner.
6. The upper and lower double-lock rod type oil well pump according to claim 1, characterized in that: the outer wall of the locking connector is provided with an outer frustum, the inner wall of the lower sealing connector is provided with an inner frustum matched with the outer frustum, and the outer frustum of the locking connector is in contact with the inner frustum of the lower sealing connector to form taper sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220095123.8U CN215890401U (en) | 2022-01-14 | 2022-01-14 | Upper and lower double-lock rod type oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220095123.8U CN215890401U (en) | 2022-01-14 | 2022-01-14 | Upper and lower double-lock rod type oil well pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890401U true CN215890401U (en) | 2022-02-22 |
Family
ID=80251392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220095123.8U Active CN215890401U (en) | 2022-01-14 | 2022-01-14 | Upper and lower double-lock rod type oil well pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890401U (en) |
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2022
- 2022-01-14 CN CN202220095123.8U patent/CN215890401U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lv Fengmei Inventor after: Dong Xiaoyan Inventor after: Chen Bin Inventor after: Guo Dong Inventor before: Lv Fengmei Inventor before: Zhang Jiang Inventor before: Xu Deguang Inventor before: Dong Xiaoyan Inventor before: Chen Bin Inventor before: Guo Dong |
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| CB03 | Change of inventor or designer information |