CN111485856A - Double-cylinder multi-plunger deep well liquid lifting device - Google Patents
Double-cylinder multi-plunger deep well liquid lifting device Download PDFInfo
- Publication number
- CN111485856A CN111485856A CN202010373578.7A CN202010373578A CN111485856A CN 111485856 A CN111485856 A CN 111485856A CN 202010373578 A CN202010373578 A CN 202010373578A CN 111485856 A CN111485856 A CN 111485856A
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- China
- Prior art keywords
- plunger
- double
- cylinder barrel
- wall cylinder
- plungers
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Classifications
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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
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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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
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/026—Pull rods, full rod component parts
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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
- F04B53/14—Pistons, piston-rods or piston-rod connections
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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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
Abstract
A double-cylinder multi-plunger deep well liquid lifting device is used together with a windable polish rod or a sucker rod, so that the stroke of the liquid lifting device can reach more than 60 meters. The multi-piston multi-cylinder oil-gas well drilling machine comprises a cylinder pipe column assembly and a multi-piston assembly, wherein the cylinder pipe column assembly comprises a lower double-wall cylinder barrel, an upper double-wall cylinder barrel and a middle oil pipe positioned between the lower double-wall cylinder barrel and the upper double-wall cylinder barrel, and the lower double-wall cylinder barrel and the middle oil pipe, the middle oil pipe and the upper double-wall cylinder barrel are connected through oil pipe couplings respectively; the multi-plunger assembly comprises multi-stage plungers which are arranged from top to bottom and have the same size, wherein the upper end of the uppermost first-stage plunger is provided with an internal thread matched with the sucker rod, the lower end of the first-stage plunger and the upper and lower ends of the rest plungers have the same structure and are respectively provided with a movable valve seat capable of rotating in the radial direction and a rotary joint capable of swinging in the axial direction; the two adjacent plungers are connected with a plunger connecting rod through a rotary joint on the two adjacent plungers, and the lengths of the lower double-wall cylinder barrel, the middle oil pipe, the upper double-wall cylinder barrel and the plungers at all levels are the same.
Description
Technical Field
The invention relates to oil extraction equipment, in particular to a double-cylinder multi-plunger deep well liquid lifting device.
Background
The pump barrel used in the traditional domestic oil production plant is more than 9 meters at the longest, does not exceed 13 meters abroad, and is limited by the structure of a rod pumping unit, and the stroke of the rod pumping unit is generally 6-8 m. The rod pumping unit is not suitable for occasions of deep wells, low-permeability wells, heavy oil wells and gas-containing wells due to stroke limitation.
At present, various kinds of twineable polish rods or sucker rods are put into use in China, and the matched long-stroke oil well pump connects the multi-stage pump cylinders together, so that the structure has high requirements on the manufacturing precision of the pump cylinders, and the field assembly is also troublesome, so that the popularization is difficult.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a double-cylinder multi-plunger deep well liquid lifting device which is used together with a windable polished rod or a sucker rod, so that the stroke of the liquid lifting device can reach more than 60 meters, the limitation that the longest stroke of the existing rod-type oil well pump is only 9 meters is broken, and the defects that the stroke of the rod-type oil well pump is limited and is not suitable for low-yield oil wells, deep wells and heavy oil wells are overcome.
The technical solution of the invention is as follows: a double-cylinder multi-plunger deep well liquid lifting device is characterized in that: the multi-plunger oil-gas well pipe comprises a pipe column assembly and a multi-plunger assembly positioned in a lower oil pipe and a pipe column assembly, wherein the pipe column assembly comprises a lower double-wall cylinder barrel, an upper double-wall cylinder barrel and a middle oil pipe positioned between the lower double-wall cylinder barrel and the upper double-wall cylinder barrel, and the lower double-wall cylinder barrel and the middle oil pipe, the middle oil pipe and the upper double-wall cylinder barrel are respectively connected through oil pipe couplings;
the multi-plunger assembly comprises multi-stage plungers which are arranged from top to bottom and have the same size, wherein the upper end of the uppermost first-stage plunger is provided with an internal thread matched with the sucker rod, the lower end of the first-stage plunger and the upper and lower ends of the rest plungers have the same structure and are respectively provided with a movable valve seat capable of rotating in the radial direction and a rotary joint capable of swinging in the axial direction; the rotary joint on the two adjacent plungers is connected with the plunger connecting rod to realize the radial and axial floating of the plunger connecting rod, the lengths of the lower double-wall cylinder barrel, the middle oil pipe, the upper double-wall cylinder barrel and each stage of plungers are the same, when the top surface of the first stage plunger is positioned at the lower port of the upper double-wall cylinder barrel in the oil pumping up-stroke process, the top surface of the second stage plunger adjacent to the first stage plunger is positioned at the upper port of the lower double-wall cylinder barrel, and the top surface of the third stage plunger adjacent to the second stage plunger is positioned at the lower port of the lower double-wall.
The surface of the movable valve seat is provided with an annular groove, a plurality of through holes are uniformly distributed in the circumferential direction of the surface of the plunger, and a rotating pin is installed in the through holes and inserted into the annular groove, so that the movable valve seat rotates in the radial direction and bears axial tension.
The movable valve seat and the rotary joint are connected together through the radial pin shafts.
The plunger connecting rods are connected with the corresponding plungers through threads.
The invention has the beneficial effects that: the lower-level plunger can be increased or decreased according to the specific conditions of the oil well, so that the stroke length is changed, the long stroke is realized, the stroke length can reach more than sixty meters, and the liquid lifting of deep wells and ultra-deep wells can be met. When the stroke is increased, only two plungers work in the upper cylinder barrel and the lower cylinder barrel, and the power of the oil pumping unit is not increased. In order to enable the plungers at all levels to smoothly enter the cylinder barrel, the plungers at all levels are connected by adopting axial floating plunger connecting rods and radial floating plunger connecting rods, compared with a multi-cylinder barrel long stroke plunger and a multi-cylinder barrel multi-plunger, the multi-cylinder barrel long stroke plunger has the advantages of simple structure, low manufacturing cost, small resistance, shortened stroke of a wear-resistant section, prolonged service life of the plungers, small leakage rate and high pump efficiency, and is suitable for oil pumping operation of deep wells, low-permeability wells, heavy oil wells and gas-containing wells.
Drawings
FIG. 1 is a schematic view of the spool assembly construction of the present invention;
FIG. 2 is an exploded schematic view of the multi-plunger assembly of the present invention;
FIG. 3 is a schematic view of the field installation configuration of the present invention;
FIG. 4 is a schematic view showing the instantaneous position of the first plunger of the upstroke of the pumping unit of the present invention entering the upper double-wall cylinder;
FIG. 5 is a schematic diagram showing the instantaneous position of the second stage plunger of the pumping upstroke entering the upper double wall cylinder of the present invention.
In the figure: 1. the oil pumping device comprises a sucker rod, 2 parts of an upper double-wall cylinder barrel, 3 parts of a lower double-wall cylinder barrel, 4 parts of a pin shaft stabilizing nail, 5 parts of a valve ball, 6 parts of a valve ball cover, 7 parts of a valve ball seat, A1 parts of a lower oil pipe, A2 parts of an intermediate oil pipe, A3 parts of an upper oil pipe, B parts of an oil pipe coupling, C parts of a plunger connecting rod, D parts of a movable valve ball, E1 parts of a first-stage plunger, E2 parts of a first-stage plunger, E3. parts of a first-stage plunger, E4. parts of a first-stage plunger, E5. parts of a first-stage plunger, E6. parts of a first-stage plunger, F parts of a movable rotary valve seat, G parts.
Detailed Description
The invention relates to a double-cylinder multi-plunger deep well liquid lifting device which comprises a bobbin-column assembly and a multi-plunger assembly positioned in the bobbin-column assembly.
As shown in figure 1, the tubular column assembly comprises a lower double-wall cylinder 3, an upper double-wall cylinder 2 and an intermediate oil pipe A2 positioned between the lower double-wall cylinder 3 and the upper double-wall cylinder 2, the lower double-wall cylinder 3 and the intermediate oil pipe A2 are connected through a tubing coupling B, the middle oil pipe A2 and the upper double-wall cylinder 2 are respectively connected through a tubing coupling B, and the cylinders can be prevented from deforming under the high pressure of a deep well by the double-wall cylinders, wherein L1 in figure 1 is a section connection mark of the tubular column assembly.
As shown in FIG. 2, Z1 and Z2 in FIG. 2 are cross-sectional designations for a multi-plunger assembly. The multi-plunger assembly comprises multi-stage plungers which are arranged from top to bottom and have the same size, in the embodiment, the multi-plunger assembly takes 6 stages as an example, the first-stage plunger E1 to the sixth-stage plunger E6 are respectively arranged from top to bottom, the upper end of the first-stage plunger E1 is provided with internal threads matched with a sucker rod, the upper end and the lower end of the first-stage plunger E1 and the upper end and the lower end of the second-stage plunger E2 to the sixth-stage plunger E6 have the same structure and are respectively provided with a movable valve seat F capable of rotating in the radial direction and a rotary joint K capable of swinging in the axial direction, the surface of the movable valve seat F is provided with an annular groove F1, a plurality of through holes are uniformly distributed on the surface of the plunger in the circumferential direction, and a rotary pin G is installed on the surface of the plunger; the movable valve seat F and the rotary joint K are respectively provided with radial pin holes corresponding to each other at the connecting positions, pin shafts H are inserted into the radial pin holes, and the movable valve seat F and the rotary joint K are connected together through the pin shafts H; the two adjacent plungers are connected with a plunger connecting rod C through threads by utilizing rotary joints K on the plungers, and the plunger connecting rod C is radially and axially floated under the action of a rotary pin G and a pin shaft H. The lower double-wall cylinder 3, the middle oil pipe A2, the upper double-wall cylinder 2 and the plungers at all stages have the same length, when the top surface of the first-stage plunger E1 is positioned at the lower port of the upper double-wall cylinder 2 during the oil pumping upstroke, the top surface of the second-stage plunger E2 is positioned at the upper port of the lower double-wall cylinder 3, and the top surface of the third-stage plunger E3 is positioned at the lower port of the lower double-wall cylinder 3.
When the multi-plunger assembly is installed on site, as shown in figure 3, a lower oil pipe assembly is put into an oil well and comprises a valve assembly and five lower oil pipes A1 which are connected in series from bottom to top, the valve assembly comprises a fixed valve ball cover 6, a fixed valve ball 5 is arranged in the inner cavity of the fixed valve ball cover 6, a fixed valve ball seat 7 is in threaded connection with the fixed valve ball cover 6, then the multi-plunger assembly is put into a barrel string assembly and connected with an upper oil pipe A3, the specifications and sizes of the upper oil pipe A3 and the lower oil pipe A1 are consistent with those of a middle oil pipe A2, the multi-plunger assembly is put into an upper oil pipe A3, a middle barrel string assembly and a lower oil pipe assembly step by step, and finally the upper end of a first-stage plunger E1 is in threaded connection with a wellhead sucker rod, and the section of the lower oil pipe assembly is marked by L2 in figure 3.
When the pumping unit pumps oil upwards, as shown in fig. 4, the first-stage plunger E1 firstly enters the lower port of the upper double-wall cylinder 2, the second-stage plunger E2 exits from the upper port of the lower double-wall cylinder 3, and the third-stage plunger E3 enters the lower port of the lower double-wall cylinder 3 to drive the liquid level to lift upwards; as shown in fig. 5, when the first-stage plunger E1 exits from the upper port of the upper double-wall cylinder 2, the second-stage plunger E2 enters the lower port of the upper double-wall cylinder 2, and the third-stage plunger E3 exits from the upper port of the lower double-wall cylinder 3, and continues to lift the liquid level upward; by analogy, the plungers at the lower level sequentially enter and exit the corresponding cylinder barrels according to the sequence, and the corresponding plungers move in the cylinder barrels all the time in the reciprocating stroke process of the oil pumping unit, so that the suction stroke and the lifting efficiency are greatly increased.
The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A double-cylinder multi-plunger deep well liquid lifting device comprises a cylinder column assembly and a multi-plunger assembly positioned in a lower oil pipe and a cylinder column assembly, wherein the cylinder column assembly comprises a lower double-wall cylinder barrel, an upper double-wall cylinder barrel and a middle oil pipe positioned between the lower double-wall cylinder barrel and the upper double-wall cylinder barrel, and the lower double-wall cylinder barrel and the middle oil pipe, the middle oil pipe and the upper double-wall cylinder barrel are connected through oil pipe couplings respectively;
the multi-plunger assembly comprises multi-stage plungers which are arranged from top to bottom and have the same size, wherein the upper end of the uppermost first-stage plunger is provided with an internal thread matched with the sucker rod, the lower end of the first-stage plunger and the upper and lower ends of the rest plungers have the same structure and are respectively provided with a movable valve seat capable of rotating in the radial direction and a rotary joint capable of swinging in the axial direction; the two adjacent plungers are connected with a plunger connecting rod through a rotary joint on the two adjacent plungers, so that the radial and axial floating of the plunger connecting rod is realized; the length of the lower double-wall cylinder barrel, the length of the middle oil pipe, the length of the upper double-wall cylinder barrel and the lengths of all stages of plungers are the same, when the top surface of the first-stage plunger is positioned at the lower port of the upper double-wall cylinder barrel in the oil pumping upstroke process, the top surface of the second-stage plunger adjacent to the first-stage plunger is positioned at the upper port of the lower double-wall cylinder barrel, and the top surface of the third-stage plunger adjacent to the second-stage plunger is positioned.
2. The dual barrel multi-plunger deep well liquid lifting device of claim 1, wherein: the surface of the movable valve seat is provided with an annular groove, a plurality of through holes are uniformly distributed in the circumferential direction of the surface of the plunger, and a rotating pin is installed in the through holes and inserted into the annular groove, so that the movable valve seat rotates in the radial direction and bears axial tension.
3. The dual barrel multi-plunger deep well liquid lifting device of claim 1, wherein: the movable valve seat and the rotary joint are connected together through the radial pin shafts.
4. The dual barrel multi-plunger deep well liquid lifting device of claim 1, wherein: the plunger connecting rods are connected with the corresponding plungers through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373578.7A CN111485856A (en) | 2020-05-06 | 2020-05-06 | Double-cylinder multi-plunger deep well liquid lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010373578.7A CN111485856A (en) | 2020-05-06 | 2020-05-06 | Double-cylinder multi-plunger deep well liquid lifting device |
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| Publication Number | Publication Date |
|---|---|
| CN111485856A true CN111485856A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010373578.7A Pending CN111485856A (en) | 2020-05-06 | 2020-05-06 | Double-cylinder multi-plunger deep well liquid lifting device |
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| CN (1) | CN111485856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997571A (en) * | 2020-09-10 | 2020-11-27 | 贺信 | Multi-plunger cooperative gas lift liquid drainage technology |
-
2020
- 2020-05-06 CN CN202010373578.7A patent/CN111485856A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997571A (en) * | 2020-09-10 | 2020-11-27 | 贺信 | Multi-plunger cooperative gas lift liquid drainage technology |
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