CN210371115U - Hydraulic feedback type under-pump weighted oil well pump - Google Patents
Hydraulic feedback type under-pump weighted oil well pump Download PDFInfo
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- CN210371115U CN210371115U CN201920893989.1U CN201920893989U CN210371115U CN 210371115 U CN210371115 U CN 210371115U CN 201920893989 U CN201920893989 U CN 201920893989U CN 210371115 U CN210371115 U CN 210371115U
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Abstract
The utility model discloses an aggravate oil-well pump under hydraulic feedback formula pump, aggravate the connector under oil-well pump body, pump, aggravate the connector under the pump and include sealed plunger, sealed pump barrel, sealed locking device is connected to sealed pump barrel upper end, sealed plunger slides in sealed pump barrel, in the sealed locking device, sealed plunger outer wall and sealed pump barrel inner wall sliding seal, sealed plunger outer wall is sliding seal with sealed locking device inner wall, the port is seted up the screw thread that is used for connecting the disk seat joint of oil-well pump plunger lower extreme on the sealed plunger, and the liquid inlet connects is connected to sealed plunger lower extreme, and radial inlet is seted up to the liquid inlet joint, the screw thread that is used for connecting the weight rod is seted up to the liquid inlet joint lower extreme. The utility model adopts a sealing locking method to put the sealing pump cylinder into the sealing plunger together, so that the size of the weighting rod is not limited by the sealing pump cylinder; when the rod column goes down, hydraulic feedback force is generated, and the rod column is assisted to go down under the action of the dual-action of the hydraulic feedback force and the weight added under the pump.
Description
Technical Field
The utility model belongs to the technical field of the oil field oil production equipment and specifically relates to a hydraulic feedback formula aggravates oil-well pump under pump.
Background
In the process of lifting and exploiting a heavy oil well and an inclined shaft by a sucker rod pump, the following problems are easy to occur due to high viscosity of crude oil and complex well track: the eccentric wear of the rod pipe is serious, and the pump inspection period of an oil well is seriously influenced; the rod column is difficult to descend, and the polished rod of part of the oil well slowly descends or even stops production. The hydraulic feedback pump or other eccentric wear prevention pumps can generate feedback force in a down stroke to help the rod column to descend, but are limited by the working fluid level and the viscosity of crude oil, so that the application range of the hydraulic feedback pump or other eccentric wear prevention pumps in thickened oil and inclined shaft lifting is limited.
Patent CN200920031495.9 discloses an under-pump weighted feedback type oil well pump, which is composed of an upper pump barrel, an upper plunger, an oil outlet valve, an upper communication joint, an oil inlet valve, a connecting pipe, a lower pump barrel, a lower plunger, a lower communication joint and a weighting rod. When the pumping rod goes down, the area of the upper part bearing high pressure is larger than that of the lower part bearing high pressure after the upper plunger and the lower plunger are connected into a whole, so that a downward feedback force is generated, and the weighting rod with certain weight is connected below the lower communication joint, so that the downward force is increased, the feedback force and the force of the weighting rod simultaneously help the pumping rod go down, the bending of the pumping rod when going down on the pump is reduced or eliminated, and the eccentric wear of the pumping rod on the oil pipe can be avoided. But the size of the weighting rod of the device is limited by the lower pump barrel, the diameter is smaller, the number of the weighting rods applied on site is large, the length is long, on one hand, the pumping of an oil well pump is limited, the pumping effect is influenced, meanwhile, the difficulty is increased for the technical design of the oil well, on the other hand, the number of the weighting rods which are put in is large, and the operation time is prolonged.
Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, to the utility model discloses more technical characteristics and the technical problem and the beneficial effect that will solve all do not have the technological inspiration in the above technical document that discloses.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hydraulic feedback type under-pump weighted oil well pump, which adopts a sealing locking method to put a sealing pump cylinder together with a sealing plunger so that the size of a weighted rod is not limited by the sealing pump cylinder; when the rod column goes down, hydraulic feedback force is generated, and the rod column is assisted to go down under the action of the dual-action of the hydraulic feedback force and the weight added under the pump.
In order to achieve the above object, the utility model adopts the following technical scheme, a hydraulic feedback type under-pump weighted oil well pump comprises an oil well pump body, wherein the oil well pump body comprises an oil well pump cylinder and an oil well pump plunger inside the oil well pump cylinder, the upper end of the oil well pump cylinder is connected with an upper joint, the upper end of the oil well pump plunger is connected with a liquid outlet joint, the lower end of the liquid outlet joint is connected with a fixed valve pair, the lower end of the fixed valve pair is connected with a valve seat joint, the under-pump weighted connector comprises a sealing plunger, a sealing pump cylinder and a sealing locking device, the upper end of the sealing pump cylinder is connected with the sealing locking device, the sealing plunger slides in the sealing pump cylinder and the sealing locking device, the outer wall of the sealing plunger is in sliding seal with the inner wall of the sealing pump, the upper end port of the sealing plunger is provided with a thread for connecting a valve seat joint at the lower end of the oil well pump plunger, the lower end of the sealing plunger is connected with a liquid inlet joint, the liquid inlet joint is provided with a radial liquid inlet, and the lower end of the liquid inlet joint is provided with a thread for connecting a weighting rod.
The sealing and locking device comprises a locking mechanism, a sealing core pipe, a sealing sleeve, a core pipe connector, a sealing sleeve lower connector and a sealing assembly, wherein the sealing core pipe is sleeved on the outer wall of the sealing plunger, the sealing core pipe and the sealing plunger are sliding sealed, the sealing sleeve is sleeved outside the sealing core pipe in a hollow mode, an annular space is formed between the sealing sleeve and the sealing core pipe, the sealing assembly is installed in the annular space, a screw buckle type upper end of the sealing sleeve is connected with the sealing sleeve upper connector, a screw buckle type upper end of the sealing sleeve is connected with a pump cylinder connector, an upper end of the pump cylinder connector is connected with an oil well pump cylinder in a screw buckle type mode, a lower end of the sealing sleeve is connected with the sealing sleeve lower connector in a screw buckle type, the lower end of the core pipe connector is also connected with the.
The locking mechanism is an elastic lock sleeve, at least three longitudinal cracks are formed in the upper half section of the elastic lock sleeve, the upper half section of the elastic lock sleeve forms a multi-petal elastic body, an outer locking clamping table is formed on the outer wall of the multi-petal elastic body, an inner locking clamping table is formed on the inner wall of the pump barrel joint, the outer diameter of the outer locking clamping table is larger than the inner diameter of the inner locking clamping table in a radial force-free state, and the radial distance from the inner wall of the multi-petal elastic body to the outer wall of the sealing plunger is larger than or equal to the radial distance from the outer diameter of the outer locking clamping table to the inner diameter of the inner locking clamping table in a non.
The sealing assembly is at least provided with one set, and each set of sealing assembly is composed of a lantern ring, a sealing ring, a spacer bush and a copper ring which are sequentially arranged from scratch.
The sealing assembly axial lower extreme presses at the core tube joint up end, sealed core tube upper end outer wall is seted up and is can be to the axial spacing outer card platform of sealing assembly axial up end, seal cover lower clutch inner wall is seted up and is can be to the axial spacing interior card platform of core tube joint lower extreme.
Compared with the prior art, the utility model following beneficial effect has:
1. the sealing locking method is adopted, the sealing assembly is directly locked between the sealing sleeve and the sealing core pipe, the upper end of the sealing locking device is limited by the pump barrel joint, the lower end of the sealing locking device is limited by the sealing sleeve lower joint, when the sealing locking device is used, the sealing pump barrel is put into along with the sealing plunger, so that the size of the weighting rod is not limited by the sealing pump barrel, the lower part of the oil well pump can carry the large-diameter weighting rod, the using length of the weighting rod is shortened while the downward force of the rod column is increased, the design of the pump hanger of the oil well pump is facilitated, in addition, the operation time can be reduced, and the.
2. The weight-adding connector under the pump is connected to the lower part of the oil well pump, can generate hydraulic feedback force when the rod column descends, and assists the rod column to descend under the dual action of the weight-adding under the pump, so that the neutral point of the rod column is moved to the position under the pump, the rod column on the pump is always kept in a bearing and pulling state, the rod column is prevented from slowly descending, and the service life of the rod column is prolonged.
3. Because the composite sucker rod is very light, the invention can be used with the composite sucker rod in a matching way, and the composite sucker rod and the steel weighting rod below the pump are all applied in a matching way, so that on one hand, the stress state of the steel rod can be effectively improved, and on the other hand, the corrosion resistance advantage of the composite sucker rod can be fully exerted, thereby prolonging the maintenance-free period of a corrosion well.
4. The axial guide effect of the sealing plunger in the sealing core tube further prevents the disadvantage that the sucker rod eccentrically wears the oil pipe.
Drawings
Fig. 1 is a schematic view of the structure of the hydraulic feedback type pump with an oil well pump under weight.
The labels in the figure are: the device comprises a pump barrel joint 1, a locking mechanism 2, a sealing plunger 3, a sealing upper joint 4, a sealing core pipe 5, a sealing sleeve 6, a lantern ring 7, a sealing ring 8, a spacer bush 9, a copper ring 10, a core pipe joint 11, a sealing sleeve lower joint 12, a sealing pump barrel 13 and a liquid inlet joint 14;
the device comprises an upper connector 15, an oil pump barrel 16, a liquid outlet connector 17, an oil pump plunger 18, a traveling valve pair 19, a liquid guide connector 20, a fixed valve pair 21 and a valve seat connector 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
an under-pump weighted oil well pump comprises an oil well pump body, wherein the oil well pump body comprises an oil well pump cylinder 16 and an oil well pump plunger 18 inside the oil well pump cylinder, the upper end of the oil well pump cylinder is connected with an upper connector 15, the upper end of the oil well pump plunger is connected with a liquid outlet connector 17, the lower end of the oil well pump plunger is connected with a liquid guide connector 20, the lower end of the liquid guide connector is connected with a fixed valve pair 21, the lower end of the fixed valve pair is connected with a valve seat connector 22, the under-pump weighted connector further comprises an under-pump weighted connector, the under-pump weighted connector comprises a sealing plunger 3, a sealing pump cylinder 13 and a sealing locking device, the upper end of the sealing pump cylinder is connected with a sealing locking device, the sealing plunger slides in the sealing pump cylinder and the sealing locking device, the outer wall of the sealing plunger and the inner wall of the sealing pump cylinder are in sliding sealing, the outer wall of, the lower end of the sealing plunger is connected with a liquid inlet joint 14, a radial liquid inlet is formed in the liquid inlet joint, and threads used for connecting a weighting rod are formed in the lower end of the liquid inlet joint.
The sealing and locking device comprises a locking mechanism 2, a sealing core pipe 5, a sealing sleeve 6, a core pipe connector 11, a sealing sleeve lower connector 12 and a sealing assembly, wherein the sealing core pipe is sleeved on the outer wall of a sealing plunger piston and is in sliding seal, the sealing sleeve is sleeved outside the sealing core pipe in a hollow mode, an annular space is formed between the sealing sleeve and the sealing core pipe, the sealing assembly is installed in the annular space, a thread buckle type upper connector 4 of the sealing sleeve is connected with the sealing sleeve upper connector, a thread buckle type upper connector of the sealing sleeve is connected with a pump barrel connector 1, a thread buckle type upper connector of the pump barrel connector is connected with an oil pump barrel, a thread buckle type lower connector of the sealing sleeve lower end is connected with the sealing sleeve lower connector, a thread buckle type lower connector of the sealing core pipe is connected with the core pipe connector, the lower end of.
The locking mechanism 2 is an elastic lock sleeve, at least three longitudinal cracks are formed in the upper half section of the elastic lock sleeve, a multi-petal elastic body is formed in the upper half section of the elastic lock sleeve, an outer locking clamping table is formed on the outer wall of the multi-petal elastic body, an inner locking clamping table is formed on the inner wall of the pump barrel joint, the outer diameter of the outer locking clamping table is larger than the inner diameter of the inner locking clamping table in a radial force-free state, and the radial distance from the inner wall of the multi-petal elastic body to the outer wall of the sealing plunger is larger than or equal to the radial distance from the outer diameter of the outer locking clamping table to the inner diameter of the inner locking clamping table in.
The sealing assembly is at least provided with one set, and each set of sealing assembly is composed of a lantern ring 7, a sealing ring 8, a spacer bush 9 and a copper ring 10 which are sequentially arranged from scratch.
The sealing assembly axial lower extreme presses at the core tube joint up end, sealed core tube upper end outer wall is seted up and is can be to the axial spacing outer card platform of sealing assembly axial up end, seal cover lower clutch inner wall is seted up and is can be to the axial spacing interior card platform of core tube joint lower extreme.
According to fig. 1, a method for under-pump weighted oil recovery comprises the following steps:
a well descending step: the lower end of the oil pipe is connected with a pump barrel of an oil well pump, the lower end of the oil well pump is connected with a lower pump weighting connector, the lower end of the lower pump weighting connector is connected with a weighting rod, and the tubular column formed by the lower pump weighting connector is arranged in a well;
oil extraction of the oil pump: the pumping rod drives the liquid outlet joint and the oil well pump plunger to move upwards, the sealing plunger moves upwards along with the oil well pump plunger, the length of the sealing plunger is larger than or equal to the sum of the length of the oil well pump and the length of the weighted connector below the pump, or the length of the extending section of the lower end of the sealing plunger extending out of the sealing pump barrel is larger than the length of the stroke of the oil well pump, when the oil well pump moves up and down to pump oil, the weighted rod at the lower end of the sealing plunger does not need to enter the sealing pump barrel, the diameter of the weighted rod can be increased, under the condition of the same weight, the length of the weighted rod is shortened, the design.
The pump diameter of the oil well pump is larger than the diameter of the sealing plunger, so that hydraulic feedback force can be generated when the rod column moves downwards, the rod column and the weight added under the pump can move downwards, the neutral point of the rod column is moved under the pump, the rod column on the pump is always in a tensile state, the rod column is prevented from slowly moving downwards, and the service life of the rod column is prolonged.
The lower pump weighting connector is connected to the lower part of the oil well pump and comprises a sealing sleeve, a sealing locking mechanism, a sealing pump barrel 13, a sealing plunger 3 and a liquid inlet joint 14. The sealing sleeve comprises a pump cylinder joint 1, a sealing sleeve upper joint 4, a sealing sleeve 6 and a sealing sleeve lower joint 12. The sealing and locking mechanism comprises a locking mechanism 2, a sealing core pipe 5, a core pipe joint 11 and a sealing assembly (comprising a lantern ring 7, a sealing ring 8, a spacer bush 9 and a copper ring 10). The sealing locking mechanism and the sealing pump barrel 13 are sleeved outside the sealing plunger 3. The lower end of the sealing plunger 3 is connected with a liquid inlet joint 14, and the lower end of the liquid inlet joint 14 is connected with a weighting rod.
The upper part of the sealing sleeve is connected with a pump cylinder of the oil well pump, and the upper part of the sealing plunger 3 is connected with a valve seat joint of a fixed valve of the oil well pump.
When in downhole operation, the pump cylinder and the sealing sleeve of the oil well pump are sequentially connected to the lower end of the oil pipe from top to bottom and are put into the well along with the oil pipe; after the oil pipe is put into the well, the sealing plunger 3 and the liquid inlet joint 14 are connected with the weighting rod, the sealing locking mechanism and the sealing pump barrel 13 are connected and sleeved outside the sealing plunger 3, the sealing locking mechanism and the sealing pump barrel are put into the well together with the oil pump plunger and the oil pump valve pair, and the sealing locking structure is suspended and fixed in the sealing sleeve by the collision pump.
Example (b):
the under-pump weighted connector for the under-pump weighted oil extraction method is connected to the lower part of an oil well pump, and the pump diameter of the oil well pump is larger than the diameter of a sealing plunger of an under-pump weighted oil extraction device, so that a hydraulic feedback type under-pump weighted oil well pump is formed. The device comprises an upper connector 15, an oil pump cylinder 16, a liquid outlet connector 17, an oil pump plunger 18, a traveling valve pair 19, a liquid guide connector 20, a fixed valve pair 21 and a valve seat connector 22. The top of the upper joint 15 is connected with an oil pipe column, and the bottom is sequentially connected with an oil pump cylinder 16, a pump cylinder joint 1, a seal sleeve upper joint 4, a seal sleeve 6 and a seal sleeve lower joint 12. The pump is connected with a liquid outlet joint 17, an oil pump plunger 18, a traveling valve pair 19, a liquid guide joint 20, a fixed valve pair 21, a valve seat joint 22, a sealing plunger 3, a liquid inlet joint 14 and a weighting rod in sequence through a sucker rod string. The sealing locking mechanism and the sealing pump barrel 13 are sleeved outside the sealing plunger 3 after being connected.
When the sucker rod goes upward, the traveling valve of the oil well pump is closed, and the fixed valve is opened, so that liquid is pumped in; when the sucker rod goes down, the fixed valve is closed, and the traveling valve is opened, so that the liquid discharge of the pump is realized. The pumping rod drives the liquid outlet joint and the oil well pump plunger to move upwards, the sealing plunger moves upwards along with the oil well pump plunger, the length of the sealing plunger is larger than or equal to the sum of the length of the oil well pump and the length of the weighted connector below the pump, or the length of the extending section of the lower end of the sealing plunger extending out of the sealing pump barrel is larger than the length of the stroke of the oil well pump, when the oil well pump moves up and down to pump oil, the weighted rod at the lower end of the sealing plunger does not need to enter the sealing pump barrel, the diameter of the weighted rod can be increased, under the condition of the same weight, the length of the weighted rod is shortened, the design.
When the pole is down, hydraulic feedback and the pump are weighted down and are used for assisting the pole to be down, the pole neutralization point is moved to the position under the pump, the pole on the pump is always kept in a tensile state, the pole is prevented from being down slowly, and the service life of the pole is prolonged.
The utility model discloses be applied to viscous crude well, inclined shaft and lift, can effectively solve pipe pole eccentric wear, polished rod and slowly descend, the pump cycle is examined in the extension, reduces the input cost.
In the description of the present invention, it should be understood that the orientation indication or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A hydraulic feedback type under-pump weighted oil well pump comprises an oil well pump body, wherein the oil well pump body comprises an oil well pump cylinder and an oil well pump plunger inside the oil well pump cylinder, the upper end of the oil well pump cylinder is connected with an upper connector, the upper end of the oil well pump plunger is connected with a liquid outlet connector, the lower end of the oil well pump plunger is connected with a liquid guide connector, the lower end of the liquid guide connector is connected with a fixed valve pair, and the lower end of the fixed valve pair is connected with a valve seat connector, the hydraulic feedback type under-pump weighted oil well pump is characterized by further comprising an under-pump weighted connector, the under-pump weighted connector comprises a sealing plunger, a sealing pump cylinder and a sealing locking device, the upper end of the sealing pump cylinder is connected with the sealing locking device, the sealing plunger slides in the sealing pump cylinder and is in the sealing locking device, the outer wall of the sealing plunger is in sliding seal with the inner wall of the sealing, the liquid inlet joint is connected to sealed plunger lower extreme, and radial inlet is seted up to the liquid inlet joint, the screw thread that is used for connecting the weight-increasing pole is seted up to the liquid inlet joint lower extreme.
2. The hydraulic feedback type under-pump weighted oil well pump according to claim 1, characterized in that, the sealing and locking device comprises a locking mechanism, a sealing core pipe, a sealing sleeve, a core pipe joint, a sealing sleeve lower joint and a sealing component, the sealing core pipe is sleeved on the outer wall of the sealing plunger piston, the sealing plunger piston and the sealing plunger piston are in sliding sealing, the sealing sleeve is sleeved outside the sealing core pipe in an empty mode, an annular space is formed between the sealing sleeve and the sealing core pipe, a sealing assembly is arranged in the annular space, the upper end of the sealing sleeve is connected with a sealing sleeve upper joint in a screw thread type, the upper end of the sealing sleeve upper joint is connected with a pump barrel joint in a screw thread type, the upper end of the pump barrel joint is connected with an oil pump barrel in a screw thread type, the lower end of the sealing sleeve is in threaded connection with a lower connector of the sealing sleeve, the lower end of the sealing core pipe is in threaded connection with a core pipe connector, the lower end of the core pipe connector is also in threaded connection with the outer wall of the sealing pump barrel, and the upper end of the sealing core pipe is in threaded connection with a locking mechanism.
3. The hydraulic feedback type under-pump weighted oil well pump according to claim 2, wherein the locking mechanism is an elastic lock sleeve, the upper half section of the elastic lock sleeve is provided with at least three longitudinal cracks, the upper half section of the elastic lock sleeve forms a multi-petal elastic body, the outer wall of the multi-petal elastic body is provided with an outer locking clamping table, the inner wall of the pump barrel joint is provided with an inner locking clamping table, the outer diameter of the outer locking clamping table is larger than the inner diameter of the inner locking clamping table in a radial force-free state, and the radial distance from the inner wall of the multi-petal elastic body to the outer wall of the sealing plunger is larger than or equal to the radial distance from the outer diameter of the outer locking clamping table to the inner diameter of the inner locking clamping table in a non-force state.
4. The hydraulic feedback type under-pump weighted oil well pump according to claim 2 or 3, wherein at least one set of sealing assembly is arranged, and each set of sealing assembly is composed of a lantern ring, a sealing ring, a spacer bush and a copper ring which are sequentially arranged from scratch.
5. The hydraulic feedback type under-pump weighted oil well pump according to claim 2 or 3, wherein the axial lower end of the sealing component is pressed on the upper end surface of the core tube connector, the outer wall of the upper end of the sealing core tube is provided with an outer clamping table capable of axially limiting the axial upper end surface of the sealing component, and the inner wall of the lower connector of the sealing sleeve is provided with an inner clamping table capable of axially limiting the lower end of the core tube connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893989.1U CN210371115U (en) | 2019-06-13 | 2019-06-13 | Hydraulic feedback type under-pump weighted oil well pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920893989.1U CN210371115U (en) | 2019-06-13 | 2019-06-13 | Hydraulic feedback type under-pump weighted oil well pump |
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| Publication Number | Publication Date |
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| CN210371115U true CN210371115U (en) | 2020-04-21 |
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|---|---|---|---|
| CN201920893989.1U Active CN210371115U (en) | 2019-06-13 | 2019-06-13 | Hydraulic feedback type under-pump weighted oil well pump |
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| CN (1) | CN210371115U (en) |
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- 2019-06-13 CN CN201920893989.1U patent/CN210371115U/en active Active
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