CN113944609B - Hydraulic power-assisted deep-pumping pilot production system device - Google Patents
Hydraulic power-assisted deep-pumping pilot production system device Download PDFInfo
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- CN113944609B CN113944609B CN202010684445.1A CN202010684445A CN113944609B CN 113944609 B CN113944609 B CN 113944609B CN 202010684445 A CN202010684445 A CN 202010684445A CN 113944609 B CN113944609 B CN 113944609B
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- 238000005086 pumping Methods 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000003129 oil well Substances 0.000 claims abstract description 121
- 239000007787 solid Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 116
- 230000009467 reduction Effects 0.000 description 14
- 230000008878 coupling Effects 0.000 description 12
- 238000010168 coupling process Methods 0.000 description 12
- 238000005859 coupling reaction Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a hydraulic power-assisted deep-pumping trial production system device, which comprises an oil well pump and a deloading pump, wherein the deloading pump is connected above the oil well pump; the deloading pump includes: the lower end of the deloading pump cylinder is connected with an oil pump cylinder of an oil pump; the load shedding pump plunger is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of a hollow sucker rod, the lower end of the load shedding pump plunger is connected with the upper end of a solid sucker rod, and the lower end of the solid sucker rod is connected with an oil well pump plunger of an oil well pump; the load shedding pump plunger and the load shedding pump cylinder form a sealing pair, and the inner diameter of the load shedding pump cylinder is more than or equal to the outer diameter of the oil well pump cylinder, so that the oil well pump plunger can be put into the oil well pump cylinder through the load shedding pump cylinder; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder. The invention reduces the stress of the sucker rod string and the oil pumping unit, prolongs the service life of the sucker rod, reduces the electricity consumption of the oil pumping unit, and has simple structure, high reliability, long service life and low processing cost.
Description
Technical Field
The invention relates to the technical field of oil pumping in oil fields, in particular to a hydraulic power assisted deep pumping trial production system device.
Background
In a deep pumping well, the pumping unit and the pumping rod bear large liquid column load, so that on one hand, the pumping unit has large energy consumption, large power consumption, low mechanical efficiency, high oil well exploitation cost and poor economic benefit; on the other hand, the sucker rod has large working stress, is easy to be reported to be broken, has short service life, causes short production period of the pumping well, increases the operation cost of the oil well, reduces the production time of the oil well and reduces the economic benefit of the oil well.
In order to solve the above problems, technicians develop devices for reducing the load of the sucker rod, such as Chinese patents; 2012202957131 sucker rod deloading device, which solves the above problems. The technical scheme is as follows: the oil-well pump comprises an oil outlet joint, an upper plunger, an upper joint of a pump cylinder of an oil-well pump, an upper pump cylinder, a lower pump cylinder coupling, a lower pump cylinder, a lower plunger and an oil inlet joint, wherein a middle thread of the upper joint of the pump cylinder of the oil-well pump is connected with the upper part of the upper pump cylinder, the lower part of the oil-well pump is connected with the upper part of the upper pump cylinder, the upper plunger is positioned in the upper pump cylinder, the upper plunger is in clearance fit and seal with the upper part of the upper pump cylinder, the lower plunger is in clearance fit and seal with the lower pump cylinder, the inner diameter of the upper plunger is smaller than that of the lower plunger, the oil outlet hole is arranged in the oil outlet joint and communicated with an inner hole of the upper plunger, the oil inlet hole is arranged in the oil inlet joint and communicated with an inner hole of the lower plunger, the connecting pipe, the upper soft seal and the lower seal are sleeved on the upper part of the connecting pipe, the upper joint of the oil-well pump cylinder is connected with the lower pump cylinder, the upper sealing and the lower sealing joint, the upper part of the lower pump cylinder is connected with the lower sealing and the lower sealing joint.
The outer diameter of the upper plunger is smaller than that of the lower plunger, the pressure of the upper part of the lower plunger is lower than that of the lower part of the lower plunger due to the balance hole, and an upward hydraulic pressure is arranged at the lower part of the lower plunger under the action of area difference and pressure difference, so that the load of the sucker rod connected to the oil outlet joint is reduced, the load of the oil pumping unit is also reduced, the service life of the sucker rod can be prolonged, and the production cycle of an oil well is prolonged.
The load reducer is composed of two oil-well pumps with different pump diameters and serially connected plunger, the small pump cylinder is on the top and the big pump cylinder is on the bottom. The plunger of the oil pump and the plunger of the large pump barrel which are arranged at the lower part of the device can not pass through the small pump barrel, so that the device can be put into a well and connected with the oil pumping unit to work by adopting a disconnecting connector.
Thus, chinese patents; 2012202957131< sucker rod deloading device >, although it can solve the problem of heavy load of the liquid column on the pumping unit and sucker rod in the deep pumping well, it has complex structure, poor reliability, short service life and high production cost, and can not achieve ideal effect.
Publication (bulletin) No.: CN202768376U, published (announced): 2013-03-06 is a ring-sealed deep-drawing load-shedding device. The lower end of an upper cover is connected with a reducing joint, the lower end of the reducing joint is connected with a plunger, the lower end of the plunger is connected with a lower moving valve cover, the lower end of a lower moving valve cover is connected with a plug, a lower moving valve ball is positioned between the lower moving valve cover and the plug, a short pump cylinder, a pump cylinder middle coupling and an auxiliary pump cylinder are respectively sleeved on the plunger, the upper end of the short pump cylinder is connected with a sealer, the lower end of the auxiliary pump cylinder is connected with a lower end coupling, the upper part of the lower end coupling is connected with an outer pipe, the upper end of the outer pipe is connected with an upper end coupling, the lower end of the lower end coupling is connected with a pump cylinder coupling, the lower end of the pump cylinder coupling is connected with a fixed valve cover, the lower end of the fixed valve cover is connected with a fixed valve joint, and a fixed valve ball valve seat is positioned between the pump cylinder coupling and the fixed valve cover. The utility model discloses improve operational environment greatly, improved the efficiency of oil-well pump, reduced the probability that the part takes off absolutely on the pump.
Publication (bulletin) No.: CN201705231U, published (announced): 2011-01-12 is a deep sucker rod load-reducing device. By release joint, tubing coupling, release pipe, disconnect-connect ware, the joint that produces oil, scrape sand cup, phi 95 short pump barrel, phi 95 long plunger, joint, breather hole, phi 127 pump barrel, phi 127 plunger, sealing ring, oil feed joint, bearing joint constitute, the utility model discloses owing to adopted two oil pumps, sucker rod, phi 95 plunger, phi 127 plunger link together, do reciprocating motion along with the sucker rod. The upper part and the lower part of the upper end surface of the phi 127 plunger are respectively positioned in two different pressure systems, and pressure generated by pressure difference acts on the upper end surface of the phi 127 plunger, so that an upward lifting force is generated, the pumping unit is assisted to drive the pumping rod and the whole set of rod column to move upwards, and the suspension point load of the pumping unit is reduced. The device has simple structure and convenient use, and is very suitable for on-site popularization and application.
Publication (bulletin) No.: CN108533480B, published (announced): 2019-10-01 discloses a casing gas-assisted lifting deloading pump, which solves the problem that the oil pumping unit has overlarge suspension point load in the oil extraction process of deep wells and ultra-deep wells. The pumping mechanism divides the pump cavity into an oil chamber and a gas chamber with variable volumes, wherein the oil chamber is communicated with the degassing mechanism, and the gas chamber is communicated with the gas inlet channel; the degassing mechanism is used for degassing crude oil and discharging gas to an oil sleeve annulus, the swabbing mechanism reciprocates in the pump cavity, and the oil chamber and the gas chamber respectively suck and discharge the degassed crude oil and casing gas alternately; the discharged casing gas and the degassed crude oil are mixed in the tubing. The casing gas is mixed with the crude oil, so that the elastic expansion energy of the gas is fully utilized, and the density of the liquid is reduced, so that the suspension point load is reduced, the difference value of the maximum and minimum suspension point loads is reduced, the stress condition of the sucker rod is improved, and the power consumption of a motor of the oil pumping unit can be saved.
Publication (bulletin) No.: CN103362796a, published (announced): 2013-10-23 relates to a load-shedding type deep well oil well pump, which comprises a pump body and a pump seat. The pump body consists of a discharge valve, a plunger system, a traveling valve, a fixed valve and a pump barrel; the pump base consists of an upper pump base coupling, a sealing rubber ring, a snap ring and a middle pump base coupling. The upper part and the lower part of the oil well pump are separated by the sliding seal fit between the sliding pipe and the sliding sleeve pipe, and are divided into an upper part high pressure area and a lower part pressure change area, so that the pressure force of the upper part liquid of the pump is ensured not to directly act on the upper end surface of the plunger, and the pressure force of the upper end surface of the plunger is reduced. The upper part of the pump cylinder is provided with a hole, the upper end surface of the plunger is communicated with the outside of the pump, and the difference between the pressure of the upper end surface of the plunger and the pressure of the lower end surface of the plunger is quite small, so that the upward resistance of the plunger is very small, and the load of the oil pumping unit is very small. The invention has the advantages of small load, labor saving, energy saving, capability of enabling oil-well pumps with the same specification to be hundreds of meters deep and greatly improving the oil extraction yield.
The technical scheme of the disclosed technology, the technical problems to be solved and the beneficial effects are all different from the technical scheme of the invention, or the technical field or the application occasion is different, and no technical inspiration exists in the technical scheme disclosed above.
Disclosure of Invention
The invention aims to provide a hydraulic power-assisted deep pumping trial production system device aiming at the defects in the prior art, which reduces the stress of a sucker rod string and a pumping unit, prolongs the service life of a sucker rod, reduces the power consumption of the pumping unit, and has the advantages of simple structure, high reliability, long service life and low processing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the hydraulic power-assisted deep-pumping trial production system device comprises an oil well pump, a load reduction pump and a control system, wherein the oil well pump comprises an oil well pump cylinder, an oil well pump plunger arranged in the oil well pump cylinder and the load reduction pump which is connected above the oil well pump; the deloading pump includes:
the lower end of the deloading pump cylinder is connected with an oil pump cylinder of an oil pump;
the load shedding pump plunger is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of a hollow sucker rod, the lower end of the load shedding pump plunger is connected with the upper end of a solid sucker rod, and the lower end of the solid sucker rod is connected with an oil well pump plunger of an oil well pump; the load shedding pump plunger and the load shedding pump cylinder form a sealing pair, and the inner diameter of the load shedding pump cylinder is more than or equal to the outer diameter of the oil well pump cylinder, so that the oil well pump plunger can be put into the oil well pump cylinder through the load shedding pump cylinder; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder.
Furthermore, the lower end of the deloading pump cylinder is connected with the pump oil feeding pipe through the deloading pump cylinder lower joint, the lower end of the pump oil feeding pipe is connected with the oil well pump cylinder of the oil well pump through the oil well pump cylinder upper joint, and the upper end of the deloading pump cylinder is connected with the upper section oil pipe through the deloading pump cylinder upper joint.
Furthermore, the upper end of the deloading pump plunger is connected with the lower end of the hollow sucker rod through a conversion joint, and the lower end of the deloading pump plunger is connected with the upper end of the solid sucker rod through a communicating joint.
Furthermore, a communicating groove is formed in the communicating joint, and well fluid in the oil pipe on the pump can enter the hollow sucker rod through the communicating groove.
Furthermore, the lower end of the solid sucker rod is connected with a plunger of an oil well pump through an oil outlet joint.
Furthermore, an oil outlet groove is formed in the oil outlet joint, and well liquid in the oil well pump can enter the oil pipe in the pump through the oil outlet groove.
Furthermore, an oil outlet valve is installed at a lower port of the plunger of the oil well pump.
Furthermore, the lower end of the oil pump cylinder is connected with the oil inlet valve through a lower connector of the oil pump cylinder.
Furthermore, the oil outlet valve and the oil inlet valve are both traveling valves and are both check valves.
Compared with the prior art, the invention has the following beneficial effects:
the pump diameter of the deloading pump cylinder is larger than that of the pump cylinder, the pump diameter of the deloading pump cylinder is larger than that of the hollow sucker rod, the pressure at the lower end of the deloading pump plunger is greatly higher than that at the upper end, and due to the action of the diameter difference and the pressure difference, the hydraulic pressure generated on the lower end face of the deloading pump plunger is greatly larger than that generated on the upper end face of the deloading pump plunger, so that the lower part of the deloading pump plunger has an upward hydraulic pressure which can have an upward power-assisting effect on the hollow sucker rod, so that the load of the hollow sucker rod is lightened, and the load of the pumping unit is lightened, thereby prolonging the service life of the pumping unit and prolonging the production period of an oil well. Therefore, the invention can reach the design purpose, under the bearing capacity of the existing pumping unit and hollow sucker rod, can increase the well-descending depth of the pump, realize deep pumping, increase the stratum production pressure difference, improve the oil well output, and the invention has the advantages of simple structure, long service life, low processing cost, no need of matching a disconnecting device and a releasing device when used in the well descending, reduced accident links, high reliability, good applicability, and remarkable economic benefit.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic power-assisted deep pumping test oil production system device according to the present invention;
fig. 2 is an enlarged fragmentary detail of fig. 1.
In the figure: the oil pump comprises an upper-section oil pipe 1, an upper deloading pump cylinder connector 2, a hollow sucker rod 3, a conversion joint 4, a deloading pump cylinder 5, a deloading pump plunger 6, a communication joint 7, a lower deloading pump cylinder connector 8, a solid sucker rod 9, an upper pump oil pipe 10, an upper oil pump cylinder connector 11, an oil outlet connector 12, an oil pump cylinder 13, an oil pump plunger 14, an oil outlet valve 15, a lower oil pump cylinder connector 16 and an oil inlet valve 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 to fig. 2, the present invention provides a technical solution:
the hydraulic power-assisted deep-pumping trial production system device comprises an oil well pump, wherein the oil well pump comprises an oil well pump cylinder 13, an oil well pump plunger 14 arranged in the oil well pump cylinder and a load reduction pump, and the load reduction pump is connected above the oil well pump; the deloading pump includes:
the load reduction pump cylinder 5, the lower end of the load reduction pump cylinder is connected with the oil pump cylinder of the oil pump;
the load shedding pump plunger 6 is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of the hollow sucker rod 3, the lower end of the load shedding pump plunger is connected with the upper end of the solid sucker rod 9, and the lower end of the solid sucker rod is connected with a plunger of an oil well pump of the oil well pump; the load-reducing pump plunger and the load-reducing pump barrel form a sealing pair, and the inner diameter of the load-reducing pump barrel is larger than or equal to the outer diameter of the oil well pump barrel, so that the oil well pump plunger can be lowered into the oil well pump barrel through the load-reducing pump barrel; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder.
Furthermore, the lower end of the deloading pump cylinder is connected with an oil pumping pipe 10 through a deloading pump cylinder lower joint 8, the lower end of the oil pumping pipe is connected with an oil well pump cylinder of an oil well pump through an oil well pump cylinder upper joint 11, and the upper end of the deloading pump cylinder is connected with an upper section oil pipe 1 through a deloading pump cylinder upper joint 2.
Furthermore, the upper end of the deloading pump plunger is connected with the lower end of the hollow sucker rod through a conversion joint 4, and the lower end of the deloading pump plunger is connected with the upper end of the solid sucker rod through a communicating joint 7.
Furthermore, a communicating groove 7-1 is arranged on the communicating joint, and well liquid in the oil pipe on the pump can enter the hollow sucker rod through the communicating groove.
Further, the lower end of the solid sucker rod is connected with an oil well pump plunger of an oil well pump through an oil outlet joint 12.
Furthermore, a communication channel, namely an oil outlet groove 12-1, is arranged on the oil outlet joint, and well liquid in the oil well pump can enter the oil pipe of the pump through the oil outlet groove 12-1.
Further, an oil outlet valve 15 is installed at the lower end of the plunger of the oil well pump.
Further, the lower end of the oil pump cylinder is connected with an oil inlet valve 17 through an oil pump cylinder lower joint 16.
Furthermore, delivery valve and inlet valve are traveling valves, are the check valve.
The traveling valve is a one-way ball valve which is arranged on a plunger of an oil well pump in drilling construction and can discharge liquid in the pump by reciprocating motion along with the plunger, and is a known technology.
The upper joint 11 of the pump cylinder of the oil well pump, the pump cylinder 13, the lower joint 16 of the pump cylinder of the oil well pump and the oil inlet valve 17 are connected in sequence, all joints keep sealing, the oil inlet valve 17 is of a single-flow structure, well fluid can flow upwards from the lower part of the oil inlet valve 17, the well fluid can not flow downwards from the upper part of the oil inlet valve 17, the lower part of the oil inlet valve 17 is provided with oil pipe threads, the upper part of the upper joint 11 of the pump cylinder of the oil well pump is provided with oil pipe internal threads, the lower part of the oil pipe 10 on the pump is connected with the upper part of the upper joint 11 of the pump cylinder of the oil well pump, the oil outlet joint 12, the plunger 14 and the oil outlet valve 15 are connected in sequence, the joint of the lower part of the plunger 14 and the upper part of the oil outlet valve 15 keeps sealing, the oil outlet joint 12, the plunger 14 and the oil outlet valve 15 are placed in the pump cylinder 13, the plunger 14 and the pump cylinder 13 form a sealing pair, the oil outlet valve 15 is of a single-flow structure, the well fluid can flow upwards from the lower part of the oil outlet valve 15 and can not flow downwards from the upper part of the oil outlet valve 15, an oil outlet groove 12-1 is arranged on the oil outlet joint 12, well liquid in the plunger 14 can flow onto the plunger 14 through the oil outlet groove 12-1, the upper part of the oil outlet joint 12 is provided with sucker rod threads, a sucker rod 9 downwards passes through the upper part of the oil pumping pipe 10 of the pump and is connected with the upper part of the oil outlet joint 12, the upper section oil pipe 1, the upper joint 2 of the deloading pump cylinder, the deloading pump cylinder 5 and the lower joint 8 of the deloading pump cylinder are sequentially connected, the lower part of the lower joint 8 of the deloading pump cylinder is connected with the upper part of the oil pumping pipe 10 of the pump, all the joints are sealed, the upper part of the conversion joint 4 is provided with hollow sucker rod threads, the hollow sucker rod 3, the conversion joint 4, the plunger 6 of the deloading pump and the communication joint 7 are sequentially connected, the sequential joints of the hollow rod 3, the conversion joint 4 and the plunger 6 of the deloading pump are sealed, and the lower part of the hollow rod 3, the conversion joint 4, the plunger 6 of the deloading pump, the communicating joint 7 is arranged in the pump barrel 13, the lower part of the communicating joint 7 is provided with a sucker rod thread, the lower part of the communicating joint 7 is connected with the upper part of the sucker rod 9, the deloading pump plunger 6 and the deloading pump barrel 5 form a sealing pair, the pump diameter of the deloading pump barrel 5 is more than or equal to that of the pump barrel 13, the communicating joint 7 is provided with a communicating groove 7-1, well liquid in the oil pipe 10 on the pump can enter the hollow sucker rod 3 through the communicating groove 7-1, and the pump diameter of the deloading pump barrel 5 is more than the outer diameter of the hollow sucker rod 3.
When the pump diameter of the pump barrel 13 is equal to or less than phi 38, the pump diameter of the deloading pump barrel 5 is greater than the pump diameter 2 of the pump barrel 13, and when the pump diameter of the pump barrel 13 is equal to or more than phi 44, the pump diameter of the deloading pump barrel 5 is greater than the pump diameter 1 of the pump barrel 13. When the pump diameter of the pump barrel 13 is equal to phi 38 according to the standard series design of the oil well pump, the pump diameter of the deloading pump barrel 5 is phi 56 (the standard series of the oil well pump are phi 28, phi 32, phi 38, phi 44, phi 56, phi 70 and phi 83 respectively); when the pump diameter of the pump cylinder 13 is equal to Φ 44, the pump diameter of the deloading pump cylinder 5 is Φ 56. The design is to obtain reasonable load reduction of the pumping unit.
When the lower pump depth of the pump barrel 13 is greater than 2000m, the length of the upper oil pipe 1 is greater than that of the pump upper oil pipe 10, and the length ratio of the upper oil pipe 1 to the pump upper oil pipe 10 is 1.5:1, when the lower pump depth of pump barrel 13 is less than 2000m and is greater than 1400m, the length of upper oil pipe 1 is close to the length of oil pipe 10 on the pump, when the lower pump depth of pump barrel 13 is less than 1400m, the length of upper oil pipe 1 is less than the length of oil pipe 10 on the pump, the length of upper oil pipe 1 and the length ratio of oil pipe 10 on the pump are 1:1.5. the design is to obtain reasonable load reduction of the pumping unit.
The hollow sucker rod 3 is the hollow sucker rod with the same rod diameter from the well head to the adapter 4, and the outer diameter of the rod body of the hollow sucker rod 3 is generally the same as that of the hollow polish rod matched with the well head sealer.
When the well is run in, the well is put into according to the structure of figure 1, the upper part of the hollow sucker rod 3 is provided with a hollow polished rod, the hollow polished rod is matched with a polished rod sealer of the well mouth to seal the well mouth, and the pumped well liquid is discharged through the hollow polished rod. The upper part of the upper section oil pipe 1 is hung on a wellhead device (a Christmas tree).
The deloading pump plunger 6 and the deloading pump cylinder 5 form a sealing pair, the pump diameter of the deloading pump cylinder 5 is larger than that of the pump cylinder 13, so that the plunger 14 can be descended into the pump cylinder 13 through the deloading pump cylinder 5 (the pump diameter of the pump cylinder 13 can also be equal to that of the deloading pump cylinder 5, and the plunger 14 can be descended into the pump cylinder 13 through the deloading pump cylinder 5 when the pump diameters of the two pump cylinders are equal). The stroke of the seal pair formed by the deloading pump plunger 6 and the deloading pump cylinder 5 is equal to (or larger than) that formed by the seal pair formed by the plunger 14 and the pump cylinder 13, and the deloading pump plunger 6 and the plunger 14 always work in the respective pump cylinders during oil pumping. During oil pumping, the deloading pump plunger 6 can not go out of the deloading pump barrel 5, so that the phenomenon that the oil pumping unit suddenly increases load to cause instability of an oil pumping system is avoided, and therefore, the rod string is required to be accurately equipped. The pressure at the lower end of the deloading pump plunger 6 is greatly higher than that at the upper end, and due to the action of the diameter difference and the pressure difference, the hydraulic pressure generated on the lower end face of the deloading pump plunger 6 by the hydraulic pressure is greatly larger than that generated on the upper end face of the deloading pump plunger 6, so that the lower part of the deloading pump plunger 6 has an upward hydraulic pressure, the load of the hollow sucker rod 3 is lightened, and the load of the pumping unit is also lightened.
The invention relates to a device for reducing the load of an oil pumping unit and an upper sucker rod string, which is used for increasing the pump descending depth of an oil well pump, increasing the submergence of the oil well pump and improving the filling degree of a deep pumping well.
Example 2:
referring to fig. 1 to 2, the present invention provides a technical solution:
the hydraulic power-assisted deep-pumping trial production system device comprises an oil well pump, wherein the oil well pump comprises an oil well pump cylinder 13, an oil well pump plunger 14 arranged in the oil well pump cylinder and a load reduction pump, and the load reduction pump is connected above the oil well pump; the deloading pump includes:
the load reduction pump cylinder 5, the lower end of the load reduction pump cylinder is connected with the oil pump cylinder of the oil pump;
the load shedding pump plunger 6 is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of the hollow sucker rod 3, the lower end of the load shedding pump plunger is connected with the upper end of the solid sucker rod 9, and the lower end of the solid sucker rod is connected with an oil well pump plunger of an oil well pump; the load-reducing pump plunger and the load-reducing pump barrel form a sealing pair, and the inner diameter of the load-reducing pump barrel is larger than or equal to the outer diameter of the oil well pump barrel, so that the oil well pump plunger can be lowered into the oil well pump barrel through the load-reducing pump barrel; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder.
Furthermore, the lower end of the deloading pump cylinder is connected with an oil pumping pipe 10 through a deloading pump cylinder lower joint 8, the lower end of the oil pumping pipe is connected with an oil well pump cylinder of an oil well pump through an oil well pump cylinder upper joint 11, and the upper end of the deloading pump cylinder is connected with an upper section oil pipe 1 through a deloading pump cylinder upper joint 2.
Furthermore, the upper end of the deloading pump plunger is connected with the lower end of the hollow sucker rod through a conversion joint 4, and the lower end of the deloading pump plunger is connected with the upper end of the solid sucker rod through a communicating joint 7.
Furthermore, a communicating groove 7-1 is arranged on the communicating joint, and well liquid in the oil pipe on the pump can enter the hollow sucker rod through the communicating groove.
Example 3:
referring to fig. 1 to 2, the present invention provides a technical solution:
the hydraulic power-assisted deep-pumping trial production system device comprises an oil well pump, wherein the oil well pump comprises an oil well pump cylinder 13, an oil well pump plunger 14 arranged in the oil well pump cylinder and a load reduction pump, and the load reduction pump is connected above the oil well pump; the deloading pump includes:
the lower end of the deloading pump cylinder is connected with an oil pump cylinder of an oil pump;
the load shedding pump plunger 6 is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of the hollow sucker rod 3, the lower end of the load shedding pump plunger is connected with the upper end of the solid sucker rod 9, and the lower end of the solid sucker rod is connected with a plunger of an oil well pump of the oil well pump; the load shedding pump plunger and the load shedding pump cylinder form a sealing pair, and the inner diameter of the load shedding pump cylinder is more than or equal to the outer diameter of the oil well pump cylinder, so that the oil well pump plunger can be put into the oil well pump cylinder through the load shedding pump cylinder; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder.
Although fig. 1 to 2 are used in all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the best embodiments, and the embodiments with less components are the basic embodiments, but the basic objects of the invention can also be achieved, so all of them are within the protection scope of the invention.
All parts which are not discussed in the present application and the connection mode of the parts in the present application belong to the known technologies in the field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment 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 (9)
1. The hydraulic power-assisted deep-pumping trial production system device comprises an oil well pump, wherein the oil well pump comprises an oil well pump cylinder and an oil well pump plunger arranged in the oil well pump cylinder, and is characterized by further comprising a deloading pump connected above the oil well pump; the deloading pump includes:
the lower end of the deloading pump cylinder is connected with an oil pump cylinder of an oil pump;
the load shedding pump plunger is a hollow plunger, the upper end of the load shedding pump plunger is connected with the lower end of a hollow sucker rod, the lower end of the load shedding pump plunger is connected with the upper end of a solid sucker rod, and the lower end of the solid sucker rod is connected with an oil well pump plunger of an oil well pump; the load shedding pump plunger and the load shedding pump cylinder form a sealing pair, and the inner diameter of the load shedding pump cylinder is more than or equal to the outer diameter of the oil well pump cylinder, so that the oil well pump plunger can be put into the oil well pump cylinder through the load shedding pump cylinder; the stroke of the seal pair formed by the deloading pump plunger and the deloading pump cylinder is more than or equal to the stroke of the seal pair formed by the oil well pump plunger and the oil well pump cylinder.
2. The hydraulic power-assisted deep-pumping trial production system device of claim 1, wherein the lower end of the deloading pump cylinder is connected with the pump upper oil pipe through a deloading pump cylinder lower joint, the lower end of the pump upper oil pipe is connected with the oil pump cylinder of the oil pump through an oil pump cylinder upper joint, and the upper end of the deloading pump cylinder is connected with the upper oil pipe through a deloading pump cylinder upper joint.
3. The hydraulic power-assisted deep-pumping trial production system device according to claim 2, wherein the upper end of the deloading pump plunger is connected with the lower end of the hollow sucker rod through an adapter, and the lower end of the deloading pump plunger is connected with the upper end of the solid sucker rod through a communicating joint.
4. The apparatus of claim 3, wherein the connection joint has a communication slot, and the well fluid in the oil pipe of the pump can enter the hollow sucker rod through the communication slot.
5. The hydraulic power-assisted deep-pumping trial production system device according to claim 1, 2 or 3, wherein the lower end of the solid sucker rod is connected with a plunger of an oil well pump through an oil outlet joint.
6. The hydraulic assisted deep pumping trial production system device of claim 5, wherein the oil outlet joint is provided with an oil outlet groove, and well fluid in the oil well pump can enter the oil pipe of the oil pump through the oil outlet groove.
7. The hydraulic power-assisted deep-pumping trial production system device according to claim 1, 2 or 3, wherein an oil outlet valve is installed at a lower port of the oil well pump plunger.
8. The hydraulic assisted deep pumping pilot production system device of claim 7, wherein the lower end of the pump barrel of the oil well pump is connected with the oil inlet valve through the lower joint of the pump barrel of the oil well pump.
9. The hydraulic assisted deep-pumping pilot production system device according to claim 8, wherein the oil outlet valve and the oil inlet valve are both traveling valves and are both check valves.
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| CN113944609A (en) | 2022-01-18 |
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