CN117052354A - Tube relay load-shedding deep drawing device - Google Patents
Tube relay load-shedding deep drawing device Download PDFInfo
- Publication number
- CN117052354A CN117052354A CN202311234155.7A CN202311234155A CN117052354A CN 117052354 A CN117052354 A CN 117052354A CN 202311234155 A CN202311234155 A CN 202311234155A CN 117052354 A CN117052354 A CN 117052354A
- Authority
- CN
- China
- Prior art keywords
- pump
- breathing
- piston
- hydraulic feedback
- pump barrel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 54
- 238000005086 pumping Methods 0.000 description 23
- 239000007788 liquid Substances 0.000 description 16
- 239000003129 oil well Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
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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
-
- 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
-
- 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
Abstract
The utility model provides a tubular relay load shedding deep drawing device, the upper pump barrel is installed on breathing joint, the lower part of upper piston is connected with the upper portion of lower piston, upper pump barrel, breathing joint suit is on the upper piston, lower piston is put into in the lower pump barrel, lower piston and lower pump barrel cooperation are sealed, the upper portion of lower pump barrel is connected with the breathing joint, the lateral wall of breathing joint has the breathing hole, the lower part of lower piston is connected into an organic whole with the upper portion of the active cell of hydraulic feedback pump, the lower part of lower pump barrel is in the free state, the stator suit of hydraulic feedback pump is outside the lower pump barrel, the upper portion of the stator of hydraulic feedback pump is connected with the lower part of breathing joint, the junction is located under the breathing hole, form the flowing back annular space between the inner wall of the stator of hydraulic feedback pump and the outer wall of lower pump barrel, there is the flowing back passageway on the lateral wall of breathing joint, the upper portion of outer tube and the external connection of breathing joint, the junction is located above the breathing hole, form the pressure balance passageway between outer tube and the active cell of hydraulic feedback pump.
Description
Technical Field
The invention relates to an oil pumping device for an oil field, in particular to a tubular relay load-shedding deep pumping device.
Background
The reciprocating sucker rod pumping device for oil field includes pumping unit, sucker rod, oil pump and oil pipe, and the pumping unit is installed on ground and in the shaft of oil well. In the process of pumping oil by adopting a reciprocating sucker rod pump in a deep well and an ultra-deep well (deep pumping and ultra-deep pumping means pumping oil by lowering the pump below kilometers or even below thousands of meters), the load born by an oil pumping unit, a sucker rod, an oil well pump and an oil pipe is large, the stroke loss generated by elastic expansion and contraction of the sucker rod and the oil pipe is large, the gap leakage between a piston and a pump barrel of the oil pumping unit is large, the pump efficiency and the system efficiency are low, the problems of disconnection and eccentric wear caused by unstable bending of the sucker rod at the lower part are outstanding, and the service lives of the oil pipe, the sucker rod and the oil pump at the lower part are short.
Therefore, the technical staff researches a reciprocating type sucker rod pump subsection pumping device, which installs a hydraulic feedback pump on an oil pipe and a sucker rod between a wellhead and an oil well pump, well fluid is pumped to the hydraulic feedback pump by the sucker rod pump and then is pumped to the ground by the hydraulic feedback pump in a relay way, so that the pressure in the oil pipe between the wellhead and the oil well pump is divided into an upper pressure system and a lower pressure system, the pressure of the oil pipe, the sucker rod and the oil well pump under the installation position of the hydraulic feedback pump and the load of the liquid column are reduced, the thrust of the well fluid on the bottom of the sucker rod column during the downstroke is reduced, the stroke loss caused by the elastic expansion of the sucker rod and the oil pipe under the installation position of the hydraulic feedback pump can be reduced, the gap leakage quantity of the oil well pump installed under the pipe column is reduced, the pumping efficiency and the pumping system efficiency of the hydraulic feedback pump can be improved, and the service life of the oil pipe, the sucker rod and the oil well pump under the installation position can be prolonged. However, this technique requires that the theoretical displacement of the hydraulic feedback pump is larger than that of the oil pump installed at the lower part of the pipe string to achieve the above-mentioned object, and thus requires that the piston diameter of the hydraulic feedback pump is larger than that of the oil pump, so that the load of the sucker rod above the installation position of the hydraulic feedback pump is increased, thereby generating adverse effects.
Although the defect of increasing load can be overcome by installing a sucker rod relief device (such as the sucker rod relief device of China patent 2012202957131) on the reciprocating type sucker rod pump segmented sucker rod device, the load of the sucker rod and the pumping unit on the installation position is reduced, and the gap leakage of two groups of pistons and pump cylinders in the sucker rod relief device can reduce the oil well yield. Moreover, the problem that the load shedding effect of the existing sucker rod load shedding device is influenced by the sleeve pressure exists, when the sleeve liquid level is high, the load shedding effect is poor, the defect of increasing the load cannot be completely overcome, for example, the load shedding effect does not exist when the sleeve pressure is at the wellhead (the situation that the sleeve is diluted), and the defect of increasing the load cannot be overcome.
According to the problems, the technical staff developed a relay load-reducing deep drawing device, such as Chinese patent application 2023100430598 (name: a reciprocating type sucker rod pump relay load-reducing deep drawing device), for solving the technical problems. However, the liquid discharge channel of the device is an inner hole of the upper hollow piston rod 4, so that the inner hole of the upper hollow piston rod 4 is large in order to ensure enough flow area, the strength of the upper hollow piston rod 4 is insufficient, and the deep drawing requirement cannot be met.
Disclosure of Invention
The invention aims to design a tubular relay load-reducing deep drawing device, solve the problems in the prior art and improve the reliability of relay load-reducing deep drawing.
The purpose of the invention is realized in the following way: comprises an upper pump cylinder, an upper piston, a breathing joint, an outer tube, a lower pump cylinder, a lower piston and a hydraulic feedback pump, wherein the outer diameter of the upper piston is smaller than that of the lower piston, the upper pump cylinder is arranged on the breathing joint, the lower part of the upper piston is connected with the upper part of the lower piston, the upper pump cylinder and the breathing joint are sleeved on the upper piston, the upper piston is sealed with the upper pump cylinder in a matched manner, the lower piston is placed in the lower pump cylinder, the lower piston is sealed with the lower pump cylinder in a matched manner, the upper part of the lower pump cylinder is connected with the breathing joint, the side wall of the breathing joint is provided with a breathing hole, the breathing hole is positioned at the joint of the lower pump cylinder and the breathing joint, the breathing hole is communicated with the lower part of the upper pump cylinder and the upper part of the lower pump cylinder, the hydraulic feedback pump consists of a rotor and a stator, the rotor can reciprocate in the stator, the plunger on the rotor of the hydraulic feedback pump is sealed with the pump in a matched manner, the lower part of the lower piston is connected with the upper part of a rotor of the hydraulic feedback pump into a whole, the lower part of the lower pump cylinder is in a free state, a stator of the hydraulic feedback pump is sleeved outside the lower pump cylinder, the upper part of the stator of the hydraulic feedback pump is connected with the lower part of the breathing joint, the connection part is positioned below the breathing hole, a liquid discharge annulus is formed between the inner wall of the stator of the hydraulic feedback pump and the outer wall of the lower pump cylinder, a liquid discharge channel is arranged on the side wall of the breathing joint, the lower end of the liquid discharge channel is communicated with the liquid discharge annulus, the upper end of the liquid discharge channel is communicated with the outside of the upper pump cylinder, the upper part of the outer tube is connected with the outside of the breathing joint, the connection part is positioned above the breathing hole, a pressure balance channel is formed between the outer tube and the breathing joint and the rotor of the hydraulic feedback pump, the upper end of the pressure balance channel is communicated with the breathing hole, the lower end of the pressure balancing channel is communicated with the inlet of the hydraulic feedback pump.
The beneficial effects of the invention are as follows: the invention is arranged on an oil pipe and a sucker rod between a wellhead and an oil well pump, can reduce stroke loss and gap leakage of the sucker pump arranged under the invention, improves pump efficiency and system efficiency, and reduces the problems of disconnection and eccentric wear caused by unstably bending of the sucker rod at the lower part. The hydraulic feedback pump is combined with the sucker rod load relief device, the defect that the sucker rod load on the position where the hydraulic feedback pump is installed in the tubular column is increased is overcome, the arranged liquid discharge channel can enable the upper piston to be designed into a solid structure, the problem of fracture caused by insufficient strength of the hollow rod in the prior art is solved, and the deep pumping requirement can be met. Therefore, the invention has obvious economic benefit when being used for deep pumping of the oil well.
Drawings
Fig. 1 is an assembly view of an embodiment of the present invention.
Description of the embodiments
An embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, the embodiment of the invention relates to a tubular relay load-reducing deep pumping device, which comprises an upper pump cylinder 1, an upper piston 2, a breathing joint 3, an outer tube 4, a lower pump cylinder 5, a lower piston 6 and a hydraulic feedback pump 7, wherein the outer diameter of the upper piston 2 is smaller than that of the lower piston 6, the upper pump cylinder 1 is arranged on the breathing joint 3, the lower part of the upper piston 2 is connected with the upper part of the lower piston 6, the upper pump cylinder 1 and the breathing joint 3 are sleeved on the upper piston 2, the upper piston 2 is sealed with the upper pump cylinder 1 in a matched manner, the lower piston 6 is placed in the lower pump cylinder 5, the lower piston 6 is sealed with the lower pump cylinder 5 in a matched manner, the upper part of the lower pump cylinder 5 is connected with the breathing joint 3, the side wall of the breathing joint 3 is provided with a breathing hole 3-1, the breathing hole 3-1 is positioned on the joint of the lower pump cylinder 5 and the breathing joint 3, the breathing hole 3-1 is communicated with the lower part of the upper pump cylinder 1 and the upper part of the lower pump cylinder 5, the hydraulic feedback pump 7 consists of a rotor and a stator, wherein the rotor is arranged in the stator, the rotor can reciprocate in the stator, a plunger on the rotor of the hydraulic feedback pump 7 is matched and sealed with a pump cylinder on the stator, the lower part of a lower piston 6 is connected with the upper part of the rotor of the hydraulic feedback pump 7 into a whole, the lower part of a lower pump cylinder 5 is in a free state, the stator of the hydraulic feedback pump 7 is sleeved outside the lower pump cylinder 5, the upper part of the stator of the hydraulic feedback pump 7 is connected with the lower part of a breathing joint 3, the joint is arranged below the breathing hole 3-1, a liquid draining annulus 7-1 is formed between the inner wall of the stator of the hydraulic feedback pump 7 and the outer wall of the lower pump cylinder 5, a liquid draining channel 3-2 is arranged on the side wall of the breathing joint 3, the lower end of the liquid draining channel 3-2 is communicated with the liquid draining annulus 7-1, the upper end of the liquid discharge channel 3-2 is communicated with the outside of the upper pump barrel 1, the upper part of the outer tube 4 is connected with the outside of the breathing joint 3, the joint is positioned above the breathing hole 3-1, a pressure balance channel 4-1 is formed between the outer tube 4, the breathing joint 3 and a rotor of the hydraulic feedback pump 7, the upper end of the pressure balance channel 4-1 is communicated with the breathing hole 3-1, and the lower end of the pressure balance channel 4-1 is communicated with an inlet of the hydraulic feedback pump 7.
The pipe column above the upper pump cylinder 1 is the oil pipe between the wellhead and the invention. The stem above the upper plunger 2 is the sucker rod between the wellhead and the present invention. The oil pipe between the invention and the oil pump is connected below the stator of the hydraulic feedback pump 7. The pumping rod between the invention and the oil pump is connected below the rotor of the hydraulic feedback pump 7.
The upper pump cylinder 1, the upper plunger 2, the breathing joint 3, the lower pump cylinder 5 and the lower piston 6 form a mechanism which is a sucker rod load reducing device, the principle of which is similar to a hydraulic jack, and the load of the sucker rod on the installation place can be reduced.
The structure of the hydraulic feedback pump 7 is a structure (two pump cylinders with different pump diameters, two pistons matched with the pump cylinders, an oil inlet valve and an oil outlet valve) disclosed in the 106 th page of an oil pump published by the oil industry press in 7 th month of 1994, but the structure is not limited to the structure.
The active cell of the hydraulic feedback pump 7 is a part which moves synchronously with the sucker rod during oil pumping and mainly comprises two pistons with different diameters, an oil inlet valve and an oil discharge valve. The stator of the hydraulic feedback pump 7 refers to the stationary part mounted on the breathing joint 3, mainly two cylinders of different pump diameters and other connectors.
According to the invention, the sucker rod load relief device and the hydraulic feedback pump are organically combined and are arranged on an oil pipe and a sucker rod between a wellhead and an oil well pump, well fluid is pumped to the invention by the sucker rod pump, and then the invention is used for carrying out relay load relief to the ground, thereby realizing relay load relief deep pumping and solving the problems existing in a deep pumping well.
The hydraulic feedback pump 7 divides the pressure in the oil pipe between the wellhead and the oil pump into two pressure systems, so that the pressure and the load of the liquid column borne by the oil pipe, the sucker rod and the oil pump which are arranged below the hydraulic feedback pump 7 are reduced, and the thrust of well liquid to the bottom of the sucker rod column is reduced during the downstroke, thereby reducing the stroke loss caused by the elastic expansion and contraction of the sucker rod and the oil pipe below the hydraulic feedback pump, reducing the gap leakage between the piston and the pump barrel of the oil pump, improving the displacement, the pump efficiency and the system efficiency, reducing the problems of disconnection and eccentric wear caused by the unstable bending of the sucker rod below the hydraulic feedback pump, prolonging the service life of the oil pipe, the sucker rod and the oil pump below the hydraulic feedback pump, and reducing the deep pumping cost.
The matching sealing of the piston and the pump cylinder is in accordance with the requirements specified in the GB/T18607 standard. The pump diameter refers to the inner diameter of the pump barrel of the oil pump.
Claims (1)
1. The utility model provides a tubular relay load shedding deep drawing device, the upper pump barrel is installed on breathing joint, the lower part of upper piston is connected with the upper portion of lower piston, upper pump barrel, breathing joint suit is on the upper piston, lower piston is put into in the lower pump barrel, lower piston and lower pump barrel cooperation are sealed, the upper portion of lower pump barrel is connected with the breathing joint, the lateral wall of breathing joint has the breathing hole, the lower part of lower piston is connected into an organic whole with the upper portion of the active cell of hydraulic feedback pump, the lower part of lower pump barrel is in the free state, the stator suit of hydraulic feedback pump is outside the lower pump barrel, the upper portion of the stator of hydraulic feedback pump is connected with the lower part of breathing joint, the junction is located under the breathing hole, form the flowing back annular space between the inner wall of the stator of hydraulic feedback pump and the outer wall of lower pump barrel, there is the flowing back passageway on the lateral wall of breathing joint, the upper portion of outer tube and the external connection of breathing joint, the junction is located above the breathing hole, form the pressure balance passageway between outer tube and the active cell of hydraulic feedback pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311234155.7A CN117052354A (en) | 2023-09-24 | 2023-09-24 | Tube relay load-shedding deep drawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311234155.7A CN117052354A (en) | 2023-09-24 | 2023-09-24 | Tube relay load-shedding deep drawing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117052354A true CN117052354A (en) | 2023-11-14 |
Family
ID=88661074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311234155.7A Pending CN117052354A (en) | 2023-09-24 | 2023-09-24 | Tube relay load-shedding deep drawing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117052354A (en) |
-
2023
- 2023-09-24 CN CN202311234155.7A patent/CN117052354A/en active Pending
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