CN115711217A - Reciprocating type sucker-rod pump segmentation oil jack - Google Patents
Reciprocating type sucker-rod pump segmentation oil jack Download PDFInfo
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- CN115711217A CN115711217A CN202211449457.1A CN202211449457A CN115711217A CN 115711217 A CN115711217 A CN 115711217A CN 202211449457 A CN202211449457 A CN 202211449457A CN 115711217 A CN115711217 A CN 115711217A
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Abstract
The utility model provides a reciprocating type has pole pump segmentation oil jack, including oil pipe on the pump, the sucker rod, the oil-well pump, install hydraulic feedback pump between oil-well pump and well head, the outside of hydraulic feedback pump is divided into two sections with oil pipe on the pump, the outside of hydraulic feedback pump is installed on the upper portion of oil pipe hypomere on the pump, the lower part of oil pipe upper segment on the pump, the inside of hydraulic feedback pump is divided into two sections with the sucker rod, the inside lower extreme of hydraulic feedback pump is connected with the upper end of the hypomere of sucker rod, the inside upper end of hydraulic feedback pump is connected with the lower extreme of sucker rod upper segment, the sucker rod drives hydraulic feedback pump, when the oil-well pump up-and-down reciprocating motion, crude oil in the pit is by the pressure boost of oil-well pump to hydraulic feedback pump, again by hydraulic feedback pump pressure boost to well head. The liquid column pressure and the liquid column load born by the lower oil pipe, the lower sucker rod and the oil pump can be reduced, the gap leakage of the oil pump is reduced, the stroke loss is reduced, the pressure fluctuation of the lower oil pipe during the up-down stroke is avoided, and the service lives of the oil pump, the lower sucker rod and the oil pipe are prolonged.
Description
Technical Field
The invention relates to an oil pumping device for an oil field, in particular to a segmented oil pumping device of a reciprocating rod pump.
Background
The pumping unit is installed on ground, the pumping rod, the oil pump and the oil pipe are installed in a shaft of the oil well, the pumping unit drives the pumping rod, and the pumping rod drives the oil pump to reciprocate to pump underground crude oil to the ground. The pumping unit with the reciprocating rod pump has the advantages that the larger the pump diameter of the oil well pump is, the larger the pump descending depth is, the larger the liquid column pressure and liquid column load borne by the oil pumping rod, the oil well pump and the oil pipe are, the larger the stroke loss caused by elastic expansion of the oil pumping rod and the oil pipe is, the larger the gap leakage between a piston of the oil well pump and a pump cylinder is, the shorter the service life of the oil pumping rod, the oil well pump and the oil pipe is, and especially the oil pumping of deep wells and ultra-deep wells is realized.
The pumping-assistant piston with the check valve structure is arranged on the sucker rod between a well head and an oil well pump for an oil field, for example, in China patent application 2007101158436 & lt & gt eccentric wear prevention oil pumping pipe column & gt, when in an up stroke, the check valve of the pumping-assistant piston is closed, and the load of a liquid column borne by the sucker rod below the pumping-assistant piston is reduced, so that the stroke loss of the sucker rod below the pumping-assistant piston can be reduced, the pump efficiency is improved, and the service life of the sucker rod below the pumping-assistant piston is prolonged; the liquid column pressure born by the oil pipe below the pumping-assistant piston is reduced, so that the gap leakage between the oil pump piston and the pump cylinder can be reduced, and the pump efficiency is improved. During the down stroke, the check valve of the pumping-assisting piston is opened, and the liquid column pressure of the oil pipe below the pumping-assisting piston is increased compared with that during the up stroke, so that the pressure of the oil pipe below the pumping-assisting piston is greatly fluctuated during the up stroke and the down stroke, and the stress condition is poor; the hydraulic pressure of the well fluid on the lower end of the sucker rod is not reduced, and the stress condition of the sucker rod on the lower part is still poor.
The load-reducing oil pumping device mounted on the oil pipe and oil pumping rod between well head and oil-well pump for oil field, for example, chinese patent 2012202957131 "sucker rod load-reducing device", includes upper pump cylinder, upper plunger, lower pump cylinder, lower plunger and balance hole, and is used for reducing load of oil pumping rod on the device and load of oil pumping machine, increasing pump-down depth or raising discharge capacity. If a check valve is arranged on a plunger of the load-reducing oil pumping device, the load-reducing effect of the load-reducing oil pumping device and the pumping-assisting effect of the pumping-assisting piston are achieved, but the problem that the pressure of an oil pipe under the load-reducing oil pumping device greatly fluctuates in the up-stroke period and the down-stroke period can also be caused.
The thick oil pump and the electric heating thick oil pump in SY/T7083-2016 special reciprocating oil pump are hydraulic feedback pumps familiar to those skilled in the art, and the skilled in the art does not find other purposes except for pumping thick oil in a thick oil well.
Disclosure of Invention
The invention aims to design a reciprocating type sucker-rod pump segmented oil pumping device, which reduces the liquid column pressure and the liquid column load borne by a lower oil pipe, a lower sucker rod and an oil well pump, reduces the gap leakage between a piston and a pump cylinder of the oil well pump, reduces the stroke loss caused by the elastic expansion of the lower sucker rod and the lower oil pipe, avoids the pressure fluctuation of the lower oil pipe during an upper stroke and a lower stroke, and prolongs the service lives of the oil well pump, the lower sucker rod and the lower oil pipe.
The purpose of the invention is realized by the following steps: the pumping oil pipe is separated into two sections by the outside of the hydraulic feedback pump, the outside of the hydraulic feedback pump is arranged on the upper part of the lower section of the pumping oil pipe, the lower part of the upper section of the pumping oil pipe, the pumping rod is separated into two sections by the inside of the hydraulic feedback pump, the lower end of the inside of the hydraulic feedback pump is connected with the upper end of the lower section of the pumping rod, the upper end of the inside of the hydraulic feedback pump is connected with the lower end of the upper section of the pumping rod, the pumping rod drives the internal mechanism of the hydraulic feedback pump, and when the pumping rod reciprocates up and down, underground crude oil is pressurized to the hydraulic feedback pump by the pumping oil pump and then is pressurized to a well head by the hydraulic feedback pump.
The beneficial effects of the invention are: a hydraulic feedback pump is arranged between the oil well pump and a well head, the pumping rod drives the hydraulic feedback pump and the oil well pump to reciprocate up and down to pump oil, underground crude oil is pressurized to the hydraulic feedback pump by the oil well pump and then is pressurized to the ground by the hydraulic feedback pump in a relay manner, and segmented oil pumping is realized. When the hydraulic feedback pump is in an up-down stroke, the two check valves of the hydraulic feedback pump are opened and closed alternately, so that the liquid column pressure and the liquid column load borne by an oil pipe, a sucker rod and an oil well pump below the hydraulic feedback pump are not influenced by a liquid column above the hydraulic feedback pump any more, the liquid column pressure and the liquid column load borne by the lower oil pipe, the lower sucker rod and the oil well pump can be reduced, the gap leakage between a piston of the oil well pump and a pump cylinder is reduced, the stroke loss caused by elastic expansion of the lower sucker rod and the lower oil pipe is reduced, the pressure fluctuation of the lower oil pipe during an up stroke and a down stroke is avoided, and the service lives of the oil well pump, the lower sucker rod and the oil pipe are prolonged.
Drawings
FIG. 1 is a schematic representation of a tubing string of the present invention.
Detailed Description
An embodiment of the present invention will be described below with reference to fig. 1.
As shown in fig. 1, the embodiment of the present invention includes a casing 1, a pumping oil pipe 2, a pumping rod 3, an oil pump 10, and a hydraulic feedback pump 11 (an inner part of a double-dot chain line frame in fig. 1), the oil pump 10 is a reciprocating rod pump, the oil pump 10 includes a pump barrel, an oil inlet valve, an oil outlet valve, and a plunger, the plunger of the oil pump 10 is sealed with the pump barrel, the pump barrel of the oil pump 10 is installed at the lower part of the pumping oil pipe 2 and the pumping rod 3, the upper end of the pumping oil pipe 2 is hung on a wellhead device, the hydraulic feedback pump 11 is installed between the oil pump 10 and the wellhead, the pumping oil pipe 2, the hydraulic feedback pump 11, and the oil pump 10 are installed in the casing 1, the outer part of the hydraulic feedback pump 11 (mainly formed by connecting two pump barrels with different pump diameters) divides the pumping oil pipe 2 into two sections, the external mounting of hydraulic feedback pump 11 is on the upper portion of oil pipe 2 hypomere on the pump, the lower part of oil pipe 2 upper end on the pump (the outer lower part of hydraulic feedback pump 11 is connected with the upper end of the hypomere of oil pipe 2 on the pump, the lower extreme of oil pipe 2 upper segment on the pump is connected with the outer upper portion of hydraulic feedback pump 11), the inside of hydraulic feedback pump 11 separates into two sections with sucker rod 3, the inside lower extreme of hydraulic feedback pump 11 is connected with the upper end of the hypomere of sucker rod 3, the inside upper end of hydraulic feedback pump 11 is connected with the lower extreme of the upper segment of sucker rod 3, sucker rod 3 drives the internal mechanism of hydraulic feedback pump 11, when oil-well pump 10 reciprocates from top to bottom, well fluid is by oil-well pump 10 pressure boost to hydraulic feedback pump 11, by hydraulic feedback pump 11 pressure boost to the well head again, the segmentation is pumped oil.
The oil well pump 10 is an existing underground reciprocating sucker rod pump and various special oil well pumps. For some special pumps, the lower end of the sucker rod 3 is different from the connecting part. The invention is in the protection scope no matter the lower end of the sucker rod 3 is connected with the part of the special pump.
The hydraulic feedback pump 11 is known in the field in many ways, such as a feedback pump, a hydraulic feedback thickened oil pump, a thickened oil pump, etc., and the most common method is known as a feedback pump, which is commonly known by those skilled in the art. One of the most common configurations for the hydraulic feedback pump 11 is that shown in figures 2-10 on page 106 of the "pump" of the oil well pump ", published by the oil industry press, 7.1994. The pump comprises an upper pump barrel 4, an upper plunger 5, an upper check valve 6, a lower pump barrel 7, a lower plunger 8 and a lower check valve 9, wherein the upper plunger 5, the upper check valve 6, the lower plunger 8 and the lower check valve 9 are connected (as shown in figure 1), the upper plunger 5 is positioned in the upper pump barrel 4, the upper plunger 5 is matched and sealed with the upper pump barrel 4 (according to the standard design of an oil well pump), the lower plunger 8 is positioned in the lower pump barrel 7, the lower plunger 8 is matched and sealed with the lower pump barrel 7 (according to the standard design of the oil well pump), well fluid can only flow upwards through the lower check valve 9 and the upper check valve 6 and cannot flow downwards through the upper check valve 6 and the lower check valve 9, and the pump diameter of the upper pump barrel 4 is larger than that of the lower pump barrel 7, so that a pump cavity 4-1 is formed. When the sucker rod 3 goes upward, the volume of the pump cavity 4-1 is increased, the upper check valve 6 is closed, the internal pressure is reduced, the lower check valve 9 is opened, and well fluid pumped by the oil well pump 10 enters the pump cavity 4-1. When the sucker rod 3 goes down, the volume of the pump cavity 4-1 is reduced, the lower single-flow valve 9 is closed, the internal pressure is increased, the upper single-flow valve 6 is opened, and the well fluid entering the pump cavity 4-1 is discharged into the upper section of the oil pipe 2 on the pump. During the up-down stroke, one check valve is always arranged on the upper check valve 6 and the lower check valve 9 of the hydraulic feedback pump 11 to be kept closed, so that the liquid column pressure and the liquid column load borne by the pump oil pipe 2, the sucker rod 3 and the oil well pump 10 below the hydraulic feedback pump 11 are not influenced by the liquid column above the hydraulic feedback pump 11 any more, the liquid column pressure and the liquid column load borne by the pump oil pipe 2, the sucker rod 3 and the oil well pump 10 below the hydraulic feedback pump 11 can be reduced, the gap leakage between the piston and the pump cylinder of the oil well pump 10 is reduced, the stroke loss caused by the elastic expansion of the oil pipe 2 and the sucker rod 2 below the hydraulic feedback pump 11 is reduced, the pressure fluctuation of the pump oil pipe 2 below the hydraulic feedback pump 11 during the up-stroke and the down-stroke is avoided, and the service lives of the oil pump 11, the sucker rod 3 and the pump oil pipe 2 below the hydraulic feedback pump 11 are prolonged.
The hydraulic feedback pump also belongs to a reciprocating pump with a rod, and utilizes the area difference between an upper plunger and a lower plunger and the pressure difference between the two ends of the upper plunger and the lower plunger to generate downward thrust (the force is called feedback force, so the feedback pump is called as a feedback pump for short by engineering technicians), the thrust can help a sucker rod string to descend, the friction force between the sucker rod string and thick oil when descending is overcome, the descending of the sucker rod and the downstroke of the oil pumping unit are synchronous, and the normal operation of an oil pumping system is ensured, so the pump is also often called as a thick oil pump and is only used for pumping oil in a thick oil well at present. As technology developed, the skilled person has devised a variety of hydraulic feedback pumps, all developed according to the technology of figures 2-10 on page 106 of the oil well pump, published by the oil industry press, 1994, 7 (the same principle of the feedback force obtained). For example, the Chinese patent application 2005100200545, a rod type thick oil pump, is one of the feedback pumps and can also be used for the invention. The feedback pump developed according to the above can be used in part in the present invention. The feedback pump (two pump cylinders with different pump diameters, two plungers matched with the pump cylinders, an oil inlet valve and an oil outlet valve) which is connected with the lower end of the lower section of the sucker rod 3 and can allow well fluid to enter from the lower end of the lower pump cylinder above the feedback pump can be used for realizing the purpose of the invention. Therefore, the structure of the hydraulic feedback pump 11 in the present invention is not limited to the structure described in the present invention, and other structures of the feedback pump can achieve the object of the present invention, and all that is within the protection scope of the present invention.
Claims (1)
1. The utility model provides a reciprocating type sucker rod pump segmentation oil pumping device, including pump oil pipe (2), sucker rod (3), oil-well pump (10) are reciprocating type sucker rod pump, oil-well pump (10) are installed at pump oil pipe (2), the lower part of sucker rod (3), the oil-well pump is characterized in that, still include hydraulic feedback pump (11), install hydraulic feedback pump (11) between oil-well pump (10) and well head, the outside of hydraulic feedback pump (11) is separated pump oil pipe (2) into two sections, the outer lower extreme of hydraulic feedback pump (11) is connected with the upper end of the hypomere of pump oil pipe (2), the lower extreme of pump oil pipe (2) upper segment is connected with the outer upper portion of hydraulic feedback pump (11), the inside of hydraulic feedback pump (11) is separated sucker rod (3) into two sections, the lower extreme of hydraulic feedback pump (11) inside is connected with the upper end of the hypomere of sucker rod (3), the upper end of hydraulic feedback pump (11) inside is connected with the lower extreme of hydraulic feedback pump (11), the hydraulic feedback pump (3) upper extreme of inner drives the internal hydraulic feedback mechanism, oil-well head (10) is by sucker rod (11) again when oil-well reciprocating, the oil-well head (11) to the booster pump, oil pump (11), the oil-well is by crude oil pump (11), the oil pump (11) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449457.1A CN115711217A (en) | 2022-11-18 | 2022-11-18 | Reciprocating type sucker-rod pump segmentation oil jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211449457.1A CN115711217A (en) | 2022-11-18 | 2022-11-18 | Reciprocating type sucker-rod pump segmentation oil jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115711217A true CN115711217A (en) | 2023-02-24 |
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ID=85233789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211449457.1A Pending CN115711217A (en) | 2022-11-18 | 2022-11-18 | Reciprocating type sucker-rod pump segmentation oil jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115711217A (en) |
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2022
- 2022-11-18 CN CN202211449457.1A patent/CN115711217A/en active Pending
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