CN110925189A - Double-air-cushion damping whole barrel pump and application method thereof - Google Patents
Double-air-cushion damping whole barrel pump and application method thereof Download PDFInfo
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- CN110925189A CN110925189A CN201911396646.5A CN201911396646A CN110925189A CN 110925189 A CN110925189 A CN 110925189A CN 201911396646 A CN201911396646 A CN 201911396646A CN 110925189 A CN110925189 A CN 110925189A
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- air cushion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
- F04B53/003—Noise damping by damping supports
Abstract
The invention provides a double-air cushion damping whole barrel pump and an application method thereof, which are mainly realized by hermetically connecting a double-air cushion damping device on the bottom end surface of a plunger, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion and an outer air cushion; meanwhile, in the descending process, the double-air cushion damping device is firstly contacted with the liquid level, and the self pressures of the inner air cushion and the outer air cushion are different, so that the double-air cushion damping device is more uniformly stressed when being contacted with the liquid level and is more suitable for different impact speeds and forces, the liquid impact effect of the liquid level on the oil well pump and even the whole oil well pipe string is greatly reduced, and the purpose of prolonging the service life of the oil well pump and the oil well pipe string is achieved.
Description
Technical Field
The invention belongs to the field of oil production equipment of oil and gas fields, and particularly relates to a double-air-cushion damping whole barrel pump and an application method thereof.
Background
At present, a whole barrel pump is generally adopted for oil extraction of an oil field pumping well, a plunger piston can impact a liquid level at a high speed when descending, so that a fluid load is suddenly transferred to an oil pipe from a rod string, and strong shock waves are generated at the same time to damage the whole oil pumping system. Particularly for oil wells with insufficient liquid supply, the liquid impact effect is more obvious. The number of liquid impact occurring every day is 7200 for an oil well with the stroke number of 5, and continuous liquid impact can cause premature fatigue failure of a sucker rod string, premature damage of a valve ball and a valve seat of an oil well pump, accelerated abrasion of a plunger and a pump barrel, and sudden stretching of an oil pipe under the action of liquid impact, so that threads of the oil pipe are loosened, and leakage or breaking failure occurs.
Disclosure of Invention
The embodiment of the invention provides a double-air-cushion damping whole cylinder pump and an application method thereof, aiming at solving the problem that the existing whole cylinder pump is easy to damage under the action of continuous liquid impact; the second purpose is to solve the problem that the oil pipe is lost or broken due to sudden stretching of the oil pipe caused by continuous liquid impact.
In order to solve the technical problem, the invention provides a double-air cushion damping whole barrel pump which comprises a plunger and an axial center oil passing channel at the center of the plunger, and also comprises a double-air cushion damping device positioned right below the plunger, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion and an outer air cushion, the outer air cushion is sleeved on the outer wall of the inner air cushion, and the center of the inner air cushion is provided with a fluid channel mutually communicated with the axial center oil passing channel of the plunger in a sealing manner;
the upper end surface of the inner air cushion and the upper end surface of the outer air cushion are both connected with the bottom end surface of the plunger piston in a sealing way.
Furthermore, the inner air cushion is an annular cylinder-shaped structure formed by coaxially sleeving a first inner cylinder and a first outer cylinder, the axial center of the first inner cylinder is a vertically through fluid channel for passing liquid, and a sealed first annular hollow space is formed between the outer cylinder wall of the first inner cylinder and the inner cylinder wall of the first outer cylinder.
Furthermore, the outer air cushion is an annular cylinder-shaped structure formed by coaxially sleeving a second inner cylinder and a second outer cylinder, the axial center of the second inner cylinder is a vertically through nesting channel for embedding the inner air cushion, and a sealed second annular hollow space is formed between the outer cylinder wall of the second inner cylinder and the inner cylinder wall of the second outer cylinder.
Furthermore, the outer cylinder wall of the first outer cylinder and the inner cylinder wall of the second outer cylinder both protrude outwards or are recessed inwards to form a concave-convex alternate structure, and when the inner air cushion is nested into the outer air cushion, the concave-convex alternate structures on the two cylinder walls are mutually extruded and meshed.
Preferably, the concavo-convex alternating structure is composed of block-shaped protrusions and grooves which are staggered.
Preferably, the concave-convex alternating structure is composed of annular grooves and annular bulges, the outer cylinder wall of the first outer cylinder is provided with a plurality of annular grooves and annular bulges at intervals from top to bottom, and the inner cylinder wall of the second outer cylinder is provided with a plurality of annular grooves and annular bulges at intervals from top to bottom.
Further, both the first annular hollow space and the second annular hollow space may be filled with any of a gas, a fluid, a semi-fluid, or a liquid.
Preferably, the internal pressure of the first annular hollow space is greater than the internal pressure of the second annular hollow space.
Furthermore, the upper end face of the inner air cushion in contact with the bottom end face of the plunger and the upper end face of the outer air cushion in contact with the bottom end face of the plunger are coated with adhesives, and the outer cylinder wall of the first outer cylinder is coated with adhesives.
The embodiment also provides an application method of the double-air cushion damping whole cylinder pump, which comprises the following steps:
firstly, embedding an inner air cushion into an outer air cushion to ensure that the inner air cushion and the outer air cushion are coaxially sleeved;
then, filling gas or liquid into the first annular hollow space of the inner air cushion and the second annular hollow space of the outer air cushion respectively, so that the pressure of the inner air cushion is greater than that of the outer air cushion, and the concave-convex alternate structures of the inner air cushion and the outer air cushion are mutually extruded and meshed to form a sealing structure;
and finally, fixedly connecting the double-air-cushion damping device to the bottom end surface of the plunger to ensure that the axial center oil passage of the plunger is communicated with the fluid passage of the inner air cushion, thereby completing the installation of the double-air-cushion damping device.
The invention has the following beneficial effects:
the invention provides a double-air cushion damping whole barrel pump and an application method thereof, which are mainly realized by hermetically connecting a double-air cushion damping device on the bottom end surface of a plunger, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion and an outer air cushion; meanwhile, in the descending process, the double-air cushion damping device is firstly contacted with the liquid level, and the self pressures of the inner air cushion and the outer air cushion are different, so that the double-air cushion damping device is more uniformly stressed when being contacted with the liquid level and is more suitable for different impact speeds and forces, the liquid impact effect of the liquid level on the oil well pump and even the whole oil well pipe string is greatly reduced, and the purpose of prolonging the service life of the oil well pump and the oil well pipe string is achieved.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic diagram of a dual air cushion shock absorbing integral cylinder pump.
Fig. 2 is a schematic structural view of the inner air cushion.
Fig. 3 is a schematic structural view of the outer cushion.
Fig. 4 is a schematic structural view of a first concavo-convex alternating structure.
Fig. 5 is a schematic structural view of a second alternating concavo-convex structure.
Description of reference numerals:
1. a plunger; 2. an inner air cushion; 3. an outer air cushion; 4. a concave-convex alternating structure; 5. a binder;
101. an axial central oil passage;
201. a fluid channel; 202. a first inner cylinder; 203. a first outer barrel; 204. a first annular hollow space;
301. nesting the channels; 302. a second inner barrel; 303. a second outer barrel; 304. a second annular hollow space.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the dual air cushion shock-absorbing integral cylinder pump described in the present specification.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The first embodiment:
the first embodiment of the invention relates to a double-air cushion damping integral cylinder pump, which comprises a plunger 1, an axial center oil passing channel 101 in the center of the plunger 1 and a double-air cushion damping device positioned right below the plunger 1, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion 2 and an outer air cushion 3, the outer air cushion 3 is sleeved on the outer wall of the inner air cushion 2, and the center of the inner air cushion 2 is provided with a fluid channel 201 which is mutually communicated with the axial center oil passing channel 101 of the plunger 1 in a sealing manner;
the upper end surface of the inner air cushion 2 and the upper end surface of the outer air cushion 3 are hermetically connected with the bottom end surface of the plunger 1.
The working process of the double-air cushion damping whole barrel pump protected by the embodiment is as follows:
as shown in fig. 1, the inner air cushion 2 is nested into the outer air cushion 3, so as to ensure that the inner air cushion 2 and the outer air cushion 3 are coaxially nested; the first annular hollow space 204 of the inner gas cushion 2 and the second annular hollow space 304 of the outer gas cushion 3 are filled with gas or liquid, respectively, such that the pressure of the inner gas cushion 2 is greater than the pressure of the outer gas cushion 3, and both form a sealed structure; fixedly connecting the double-air-cushion damping device to the bottom end surface of the plunger 1, and ensuring that the axial center oil passage 101 of the plunger 1 is communicated with the fluid passage 201 of the inner air cushion 2 to complete the installation of the double-air-cushion damping device;
the double-air-cushion shock absorption whole barrel pump is connected into a down-entering shaft at the tail part of an oil pipe, when the plunger 1 descends, the double-air-cushion shock absorption device firstly contacts a liquid level, namely, liquid impact is carried out on the double-air-cushion shock absorption device, however, the double-air-cushion shock absorption device has a good shock absorption effect, the action time of the plunger impacting the liquid level when the plunger of the oil well pump descends is prolonged, the liquid impact effect of the liquid level on the oil well pump and even the whole oil well pipe string is greatly relieved, and the purpose of prolonging the service life of the oil well pump and the oil well pipe string is achieved.
In the present embodiment, it is considered that the liquid needs to flow through the axial center oil passing passage 101 of the plunger 1 regardless of the upward or downward movement of the plunger 1, and the double air cushion damper is connected to the lower end surface of the plunger 1, and the liquid needs to flow through the double air cushion damper first, so that the fluid passage 201 is opened in the center of the inner air cushion 2, and in order to avoid the throttling or the diffusion phenomenon, the diameter of the fluid passage 201 is preferably the same as the diameter of the axial center oil passing passage 101 in the present embodiment.
Second embodiment:
the embodiment relates to a double-air cushion damping whole barrel pump, which comprises a plunger 1, an axial center oil passing channel 101 in the center of the plunger 1 and a double-air cushion damping device positioned right below the plunger 1, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion 2 and an outer air cushion 3, the outer air cushion 3 is sleeved on the outer wall of the inner air cushion 2, and a fluid channel 201 which is mutually communicated with the axial center oil passing channel 101 of the plunger 1 in a sealing manner is formed in the center of the inner air cushion 2; the upper end surface of the inner air cushion 2 and the upper end surface of the outer air cushion 3 are hermetically connected with the bottom end surface of the plunger 1.
Specifically, as shown in fig. 2, the inner air cushion 2 is an annular cylindrical structure formed by coaxially sleeving a first inner cylinder 202 and a first outer cylinder 203, an axial center of the first inner cylinder 202 is a vertically through fluid passage 201 for passing a liquid, a sealed first annular hollow space 204 is formed between an outer cylinder wall of the first inner cylinder 202 and an inner cylinder wall of the first outer cylinder 203, the first annular hollow space 204 can be filled with any one of a gas, a fluid, a semi-fluid or a liquid, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
Referring to fig. 3, the outer air cushion 3 is an annular cylinder structure formed by coaxially sleeving a second inner cylinder 302 and a second outer cylinder 303, the axial center of the second inner cylinder 302 is a vertically through nesting channel 301 for embedding the inner air cushion 2, a sealed second annular hollow space 304 is formed between the outer cylinder wall of the second inner cylinder 302 and the inner cylinder wall of the second outer cylinder 303, any one of gas, fluid, semifluid or liquid can be filled in the second annular hollow space 304, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
As shown in fig. 1, the inner air cushion 2 filled with gas (liquid) is nested into the outer air cushion 3, specifically, the first outer cylinder 203 and the second outer cylinder 303 are ensured to be in sealing contact, and the two cylinder walls are ensured to be in contact fit.
In particular, when filling the first annular hollow space 204 and the second annular hollow space 304 with gas/liquid, it is necessary to ensure that the internal pressure of the first annular hollow space 204 is greater than the internal pressure of the second annular hollow space 304, that is, the pressure of the outer air cushion 3 is less than the pressure of the inner air cushion 2, compared with this, the outer air cushion 3 is softer, and the inner air cushion 2 is harder, so that, when the outer air cushion 3 and the inner air cushion 2 are subjected to liquid impact, the outer air cushion 3 and the inner air cushion 2 have different buffering effects due to different hardness, and the double-layer buffering effect is superposed to further improve the buffering effect of the double-air-cushion shock absorbing device.
The third embodiment:
the embodiment relates to a double-air cushion damping whole barrel pump, which comprises a plunger 1, an axial center oil passing channel 101 in the center of the plunger 1 and a double-air cushion damping device positioned right below the plunger 1, wherein the double-air cushion damping device is formed by coaxially sleeving an inner air cushion 2 and an outer air cushion 3, the outer air cushion 3 is sleeved on the outer wall of the inner air cushion 2, and a fluid channel 201 which is mutually communicated with the axial center oil passing channel 101 of the plunger 1 in a sealing manner is formed in the center of the inner air cushion 2; the upper end surface of the inner air cushion 2 and the upper end surface of the outer air cushion 3 are hermetically connected with the bottom end surface of the plunger 1.
Specifically, as shown in fig. 2, the inner air cushion 2 is an annular cylindrical structure formed by coaxially sleeving a first inner cylinder 202 and a first outer cylinder 203, an axial center of the first inner cylinder 202 is a vertically through fluid passage 201 for passing a liquid, a sealed first annular hollow space 204 is formed between an outer cylinder wall of the first inner cylinder 202 and an inner cylinder wall of the first outer cylinder 203, the first annular hollow space 204 can be filled with any one of a gas, a fluid, a semi-fluid or a liquid, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
Referring to fig. 3, the outer air cushion 3 is an annular cylinder structure formed by coaxially sleeving a second inner cylinder 302 and a second outer cylinder 303, the axial center of the second inner cylinder 302 is a vertically through nesting channel 301 for embedding the inner air cushion 2, a sealed second annular hollow space 304 is formed between the outer cylinder wall of the second inner cylinder 302 and the inner cylinder wall of the second outer cylinder 303, any one of gas, fluid, semifluid or liquid can be filled in the second annular hollow space 304, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
Referring to fig. 2 and 3, the outer cylinder wall of the first outer cylinder 203 and the inner cylinder wall of the second outer cylinder 303 both protrude outwards or are sunken inwards to form concave-convex alternating structures 4, and when the inner air cushion 2 is nested in the outer air cushion 3, the concave-convex alternating structures 4 on the two cylinder walls are mutually pressed and meshed.
Similar to the mortise and tenon structure in gear engagement or building structure, concave-convex cooperation is selected to this embodiment, closely with first urceolus 203 and the chucking of second urceolus 303, namely with interior air cushion 2 sealed nestification in outer air cushion 3, avoids the too big separation that causes two air cushions of liquid impact pressure, and then has weakened buffering effect.
Preferably, as shown in fig. 4, the concavo-convex alternating structure 4 is composed of block-shaped protrusions and grooves which are staggered.
The block-shaped bulges of the inner air cushion 2 are inserted into the grooves of the outer air cushion 3, and the block-shaped bulges of the outer air cushion 3 are inserted into the grooves of the inner air cushion 2, so that the inner air cushion 2 is nested in the outer air cushion 3 in a sealing way.
Preferably, as shown in fig. 5, the concave-convex alternating structure 4 is composed of annular grooves and annular protrusions, the outer cylinder wall of the first outer cylinder 203 is provided with a plurality of annular grooves and annular protrusions at intervals from top to bottom, and the inner cylinder wall of the second outer cylinder 303 is provided with a plurality of annular grooves and annular protrusions at intervals from top to bottom.
The annular bulge of the inner air cushion 2 is inserted into the annular groove of the outer air cushion 3, and the annular bulge of the outer air cushion 3 is inserted into the annular groove of the inner air cushion 2, so that the inner air cushion 2 is hermetically nested in the outer air cushion 3.
Fourth embodiment:
on the basis of the above embodiment, referring to fig. 2 and 3, the upper end surface of the inner air cushion 2 contacting the bottom end surface of the plunger 1, and the upper end surface of the outer air cushion 3 contacting the bottom end surface of the plunger 1 are coated with the adhesive 5, and the outer cylindrical wall of the first outer cylinder 203 is coated with the adhesive 5.
In order to ensure the sealing connection between the plunger 1 and the dual air cushion shock absorbing device, the present embodiment preferably has an adhesive 5, and as shown in fig. 2 and 3, all outer surfaces that contact the plunger 1, for example, the upper end surface of the inner air cushion 2, the upper end surface of the outer air cushion 3, and the outer cylindrical wall of the first outer cylinder 203, are coated with the adhesive 5.
Fifth embodiment:
the embodiment protects an application method of a double-air cushion damping whole cylinder pump, which comprises the following steps:
firstly, nesting an inner air cushion 2 into an outer air cushion 3 to ensure that the inner air cushion 2 and the outer air cushion 3 are coaxially sleeved;
then, filling gas or liquid into the first annular hollow space 204 of the inner air cushion 2 and the second annular hollow space 304 of the outer air cushion 3 respectively, so that the pressure of the inner air cushion 2 is greater than that of the outer air cushion 3, and the concave-convex alternating structures 4 of the two are mutually pressed and engaged to form a sealing structure;
and finally, fixedly connecting the double-air-cushion damping device to the bottom end surface of the plunger 1, and ensuring that the axial center oil passage 101 of the plunger 1 is communicated with the fluid passage 201 of the inner air cushion 2, thereby completing the installation of the double-air-cushion damping device.
The double-air cushion shock absorption integral cylinder pump comprises a plunger piston 1, an axial center oil passing channel 101 in the center of the plunger piston 1 and a double-air cushion shock absorption device positioned right below the plunger piston 1, wherein the double-air cushion shock absorption device is formed by coaxially sleeving an inner air cushion 2 and an outer air cushion 3, the outer air cushion 3 is sleeved on the outer wall of the inner air cushion 2, and a fluid channel 201 which is mutually communicated with the axial center oil passing channel 101 of the plunger piston 1 in a sealing manner is formed in the center of the inner air cushion 2; the upper end surface of the inner air cushion 2 and the upper end surface of the outer air cushion 3 are hermetically connected with the bottom end surface of the plunger 1.
Specifically, as shown in fig. 2, the inner air cushion 2 is an annular cylindrical structure formed by coaxially sleeving a first inner cylinder 202 and a first outer cylinder 203, an axial center of the first inner cylinder 202 is a vertically through fluid passage 201 for passing a liquid, a sealed first annular hollow space 204 is formed between an outer cylinder wall of the first inner cylinder 202 and an inner cylinder wall of the first outer cylinder 203, the first annular hollow space 204 can be filled with any one of a gas, a fluid, a semi-fluid or a liquid, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
Referring to fig. 3, the outer air cushion 3 is an annular cylinder structure formed by coaxially sleeving a second inner cylinder 302 and a second outer cylinder 303, the axial center of the second inner cylinder 302 is a vertically through nesting channel 301 for embedding the inner air cushion 2, a sealed second annular hollow space 304 is formed between the outer cylinder wall of the second inner cylinder 302 and the inner cylinder wall of the second outer cylinder 303, any one of gas, fluid, semifluid or liquid can be filled in the second annular hollow space 304, and the gas is preferably SF6 (sulfur hexafluoride) or C2F6 (hexafluoroethane).
Referring to fig. 2 and 3, the outer cylinder wall of the first outer cylinder 203 and the inner cylinder wall of the second outer cylinder 303 both protrude outwards or are sunken inwards to form concave-convex alternating structures 4, and when the inner air cushion 2 is nested in the outer air cushion 3, the concave-convex alternating structures 4 on the two cylinder walls are mutually pressed and meshed.
The upper end face of the inner air cushion 2 contacting with the bottom end face of the plunger 1 and the upper end face of the outer air cushion 3 contacting with the bottom end face of the plunger 1 are coated with an adhesive 5, and the outer cylinder wall of the first outer cylinder 203 is coated with the adhesive 5.
In conclusion, the double-air-cushion damping whole barrel pump and the application method thereof are realized by sealing and connecting a double-air-cushion damping device on the bottom end face of the plunger piston, wherein the double-air-cushion damping device is formed by coaxially sleeving an inner air cushion and an outer air cushion, and when the plunger piston descends, the double-air-cushion damping device is driven to descend together, so that the action time of the plunger piston impacting the liquid level when the plunger piston of the oil well pump descends is prolonged; meanwhile, in the descending process, the double-air cushion damping device is firstly contacted with the liquid level, and the self pressures of the inner air cushion and the outer air cushion are different, so that the double-air cushion damping device is more uniformly stressed when being contacted with the liquid level and is more suitable for different impact speeds and forces, the liquid impact effect of the liquid level on the oil well pump and even the whole oil well pipe string is greatly reduced, and the purpose of prolonging the service life of the oil well pump and the oil well pipe string is achieved.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. The utility model provides a whole section of thick bamboo pump of two air cushions shock attenuation, includes axial direction central oil passage (101) at plunger (1) and plunger (1) center, its characterized in that: the double-air-cushion shock absorption device is positioned right below the plunger (1), the double-air-cushion shock absorption device is formed by coaxially sleeving an inner air cushion (2) and an outer air cushion (3), the outer air cushion (3) is sleeved on the outer wall of the inner air cushion (2), and a fluid channel (201) which is mutually communicated with an axial center oil passing channel (101) of the plunger (1) in a sealing manner is formed in the center of the inner air cushion (2);
the upper end surface of the inner air cushion (2) and the upper end surface of the outer air cushion (3) are hermetically connected with the bottom end surface of the plunger (1).
2. The dual air cushion shock absorbing monoblock pump of claim 1 wherein: the inner air cushion (2) is of an annular cylindrical structure formed by coaxially sleeving a first inner cylinder (202) and a first outer cylinder (203), the axial center of the first inner cylinder (202) is a vertically through fluid channel (201) for liquid to pass through, and a sealed first annular hollow space (204) is arranged between the outer cylinder wall of the first inner cylinder (202) and the inner cylinder wall of the first outer cylinder (203).
3. The dual air cushion shock absorbing monoblock pump of claim 1 or 2, wherein: the outer air cushion (3) is of an annular cylindrical structure formed by coaxially sleeving a second inner cylinder (302) and a second outer cylinder (303), the axial center of the second inner cylinder (302) is a vertically through nesting channel (301) for embedding the inner air cushion (2), and a sealed second annular hollow space (304) is arranged between the outer cylinder wall of the second inner cylinder (302) and the inner cylinder wall of the second outer cylinder (303).
4. The dual air cushion shock absorbing monoblock pump of claim 3 wherein: the outer cylinder wall of the first outer cylinder (203) and the inner cylinder wall of the second outer cylinder (303) both protrude outwards or are sunken inwards to form concave-convex alternate structures (4), and when the inner air cushion (2) is nested in the outer air cushion (3), the concave-convex alternate structures (4) on the two cylinder walls are mutually extruded and meshed.
5. The dual air cushion shock absorbing monoblock pump of claim 4 wherein: the concave-convex alternating structure (4) is formed by staggering block-shaped bulges and grooves.
6. The dual air cushion shock absorbing monoblock pump of claim 4 wherein: the concave-convex alternating structure (4) is composed of annular grooves and annular bulges, the outer cylinder wall of the first outer cylinder (203) is provided with a plurality of annular grooves and annular bulges at intervals from top to bottom, and the inner cylinder wall of the second outer cylinder (303) is provided with a plurality of annular grooves and annular bulges at intervals from top to bottom.
7. The dual air cushion shock absorbing monoblock pump of claim 3 wherein: both within the first annular hollow space (204) and within the second annular hollow space (304) may be filled with any of a gas, a fluid, a semi-fluid, or a liquid.
8. The dual air cushion shock absorbing monoblock pump of claim 7 wherein: the internal pressure of the first annular hollow space (204) is greater than the internal pressure of the second annular hollow space (304).
9. The dual air cushion shock absorbing monoblock pump of claim 3 wherein: the upper end face of the inner air cushion (2) in contact with the bottom end face of the plunger (1) and the upper end face of the outer air cushion (3) in contact with the bottom end face of the plunger (1) are coated with adhesives (5), and the outer cylinder wall of the first outer cylinder (203) is coated with the adhesives (5).
10. A method of using a dual air cushion shock absorbing integral cylinder pump as claimed in any one of claims 1 to 9, wherein:
firstly, nesting an inner air cushion (2) into an outer air cushion (3) to ensure that the inner air cushion (2) and the outer air cushion (3) are coaxially sleeved;
then, filling gas or liquid into the first annular hollow space (204) of the inner air cushion (2) and the second annular hollow space (304) of the outer air cushion (3) respectively, so that the pressure of the inner air cushion (2) is greater than that of the outer air cushion (3), and the concave-convex alternating structures (4) of the inner air cushion and the outer air cushion are mutually extruded and meshed to form a sealing structure;
and finally, fixedly connecting the double-air-cushion damping device to the bottom end surface of the plunger (1) to ensure that the axial center oil passing channel (101) of the plunger (1) is communicated with the fluid channel (201) of the inner air cushion (2), thereby completing the installation of the double-air-cushion damping device.
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| CN201911396646.5A CN110925189A (en) | 2019-12-30 | 2019-12-30 | Double-air-cushion damping whole barrel pump and application method thereof |
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| CN201911396646.5A CN110925189A (en) | 2019-12-30 | 2019-12-30 | Double-air-cushion damping whole barrel pump and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561444A (en) * | 2020-05-11 | 2020-08-21 | 中国石油天然气股份有限公司 | Oil pump plunger and oil pump |
Citations (12)
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| GB1171550A (en) * | 1967-10-27 | 1969-11-19 | Earl Kenneth Moore | Free Plunger Pneumatic Arrestor and Control System for Well Pumping Apparatus |
| CN2556364Y (en) * | 2002-07-26 | 2003-06-18 | 大庆油田有限责任公司 | Downhole oil-water separating device for continuous oil feeding oil well pump |
| US20060124292A1 (en) * | 2004-12-10 | 2006-06-15 | Victor Bruce M | Internal shock absorber plunger |
| CN200985876Y (en) * | 2006-06-06 | 2007-12-05 | 朱汉卿 | Pipe rod fluctuation proof bias-wearing oil gas mixing extraction pump |
| US20090188673A1 (en) * | 2008-01-25 | 2009-07-30 | Weatherford/Lamb, Inc. | Plunger lift system for well |
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| US20180135614A1 (en) * | 2016-11-17 | 2018-05-17 | Black Night Enterprises, Inc. | Shock dampening pump |
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| CN207921200U (en) * | 2018-02-26 | 2018-09-28 | 安徽致信汽车科技有限公司 | A kind of plunger pump beam |
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| CN111561444A (en) * | 2020-05-11 | 2020-08-21 | 中国石油天然气股份有限公司 | Oil pump plunger and oil pump |
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