CN114592830A - Intelligent sleeve gas recovery device - Google Patents
Intelligent sleeve gas recovery device Download PDFInfo
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- CN114592830A CN114592830A CN202210267309.1A CN202210267309A CN114592830A CN 114592830 A CN114592830 A CN 114592830A CN 202210267309 A CN202210267309 A CN 202210267309A CN 114592830 A CN114592830 A CN 114592830A
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- 238000011084 recovery Methods 0.000 title claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 164
- 238000007789 sealing Methods 0.000 claims abstract description 119
- 238000003860 storage Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 43
- 239000003129 oil well Substances 0.000 description 13
- 238000005086 pumping Methods 0.000 description 11
- 238000007599 discharging Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to an intelligent sleeve gas recovery device which comprises a liquid drainage cylinder body, wherein one end of the liquid drainage cylinder body is connected with a liquid drainage pipeline of a hydraulic cylinder, a sealing element is fixed in the liquid drainage cylinder body, the liquid drainage cylinder body is divided into a cylinder and a hydraulic cylinder by the sealing element, a cylinder sealing piston is arranged in the cylinder, a hydraulic cylinder sealing piston is arranged in the liquid drainage cylinder body, the cylinder sealing piston and the hydraulic cylinder sealing piston are connected through a connecting rod, and the connecting rod is in sliding connection with the sealing element; the liquid discharge cylinder body is connected with a liquid discharge pipeline, an air cylinder exhaust pipeline and an air cylinder air inlet pipeline, one end of the liquid discharge pipeline is connected with the liquid discharge cylinder body, the connecting position of the liquid discharge pipeline is arranged corresponding to the liquid cylinder, and the other end of the liquid discharge pipeline is connected with an oil collection pipeline; one end of the cylinder exhaust pipeline is connected with the liquid discharge cylinder body, the connecting position of the cylinder exhaust pipeline is arranged corresponding to the cylinder, and the other end of the cylinder exhaust pipeline is connected with the liquid discharge pipeline of the hydraulic cylinder; the cylinder exhaust pipeline is provided with a first valve, the oil collecting pipeline is provided with a second valve, and the cylinder intake pipeline is provided with a control valve. The device saves energy.
Description
Technical Field
The invention belongs to the technical field of oil extraction engineering, and particularly relates to an intelligent casing gas recovery device.
Background
Associated gas resources in China are rich, but casing gas cannot automatically enter a flow because the back pressure of most oil wells is higher than the casing pressure. Casing gas not only easily makes oil well airlock, and the cover is pressed too high moreover, will be unable to carry out the annular space to the oil well and add the medicine. Because the sleeve gas contains inflammable and sulfide components, the sleeve gas is directly discharged to bring potential safety and environmental protection hazards, and precious natural gas resources are wasted. In order to recycle the casing gas, the following processes are applied on site:
(1) gas recovery device for booster casing of rope suspension device
The device utilizes the down stroke of the polish rod of the pumping unit to do work on the sleeve gas recovery device, compresses the conveying sleeve gas to enter the oil conveying process, and can keep the air pressure in the sleeve at about 0.2 Mpa. But the cost of the equipment is high, and each equipment needs about 5 ten thousand yuan; the horsehead suspension point load has large impact pressure on the device, the service life of the device is short, the device is provided with a plurality of sealing pieces, and the sealing ring is easy to damage, so that the field failure of the device is caused. The field test of the oil extraction plant uses 10 sets of equipment, which are all damaged at present. In addition, the device can only recover casing gas above 0.2MPa, and is limited in application to oil wells.
(2) Beam-pumping unit walking beam pressure boost sleeve pipe gas recovery unit
According to the device, the piston connecting rod of the pumping cylinder is connected to the walking beam, the piston of the pumping cylinder is driven to move up and down by means of up-and-down reciprocating motion of the walking beam, pumping and compression of casing gas are completed, and the compressed gas is injected into an oil outlet flow. However, the device is pressurized by the walking beam of the pumping unit for a long time, the long-stroke pumping cylinder is easy to damage, and the service life is short.
(3) Movable casing gas recovery device
By using the vehicle-mounted sleeve gas pressurization recovery device, the pressure of the sleeve is mainly pressed into a back pressure pipeline by a compressor, so that the pressure in the sleeve can be kept at about 0.15 Mpa. However, the device needs to be operated by one worker on site, and needs to consume electricity, and in addition, the device has high manufacturing cost and limited application range.
The three technologies not only have the problems of low recovery efficiency of casing gas, easy damage of equipment and the like, but also do not have the function of adapting to the optimal control between casing pressure and oil well yield in the production process of different oil wells, so that the efficiency of the oil well pump is kept within a reasonable range for a long time.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides an intelligent casing gas recycling device to solve at least one of the above technical problems.
In order to achieve the above object, the present invention provides the following technical solutions:
an intelligent sleeve gas recovery device comprises a liquid discharge cylinder body, wherein one end of the liquid discharge cylinder body is connected with a hydraulic cylinder liquid discharge pipeline, a sealing element is fixed in the liquid discharge cylinder body and divides the liquid discharge cylinder body into a cylinder and a hydraulic cylinder, a cylinder sealing piston is arranged in the cylinder, a hydraulic cylinder sealing piston is arranged in the liquid discharge cylinder body, the cylinder sealing piston and the hydraulic cylinder sealing piston are connected through a connecting rod, and the connecting rod is in sliding connection with the sealing element; the liquid discharging cylinder body is connected with a liquid discharging pipeline, an air cylinder exhaust pipeline and an air cylinder air inlet pipeline, one end of the liquid discharging pipeline is connected with the liquid discharging cylinder body, the connecting position of the liquid discharging pipeline is arranged corresponding to the liquid cylinder, and the other end of the liquid discharging pipeline is connected with an oil collecting pipeline; one end of the cylinder exhaust pipeline is connected with the liquid discharge cylinder body, the connecting position of the cylinder exhaust pipeline is arranged corresponding to the cylinder, and the other end of the cylinder exhaust pipeline is connected with the liquid discharge pipeline of the hydraulic cylinder; a first valve is arranged on the cylinder exhaust pipe line and used for cylinder exhaust, a second valve is arranged on the oil collecting pipe line and used for liquid discharge of a hydraulic cylinder, and a control valve is arranged on the cylinder air inlet pipe line and used for cylinder air inlet; in an original state, a space is reserved between the hydraulic cylinder sealing piston and the sealing element, the position where the cylinder exhaust pipeline is connected with the liquid discharge cylinder body is located between the cylinder sealing piston and the sealing element, and a space is reserved between one end, far away from the sealing element, of the cylinder and the cylinder sealing piston.
Preferably, a pressure storage cavity is formed between one end of the cylinder, which is far away from the sealing element, and the cylinder sealing piston, and a pressure recovery pipe is arranged on the liquid discharge cylinder body; one end of the pressure recovery pipe is connected with the liquid discharge cylinder body, and the connection position of the pressure recovery pipe is arranged corresponding to the position of the pressure storage cavity; the other end of the pressure recovery pipe is connected with the oil collecting pipeline, and the connection position is positioned on one side, away from the liquid drainage pipeline, of the second valve; and a distance is reserved between the position where the liquid cylinder liquid discharge pipeline is connected with the liquid discharge cylinder body and one end of the liquid cylinder, which is far away from the sealing element.
Preferably, the position where the hydraulic cylinder drainage pipeline is connected with the drainage cylinder body is arranged close to the sealing element.
Preferably, a first pressure gauge is arranged on the pressure recovery pipe; the oil collecting pipeline is provided with a gas-liquid mixing outlet, a gas-liquid mixing outlet valve is arranged at the gas-liquid mixing outlet, and the gas-liquid mixing outlet valve is positioned on one side of the pressure recovery pipe away from the liquid cylinder liquid discharge pipeline; the position that corresponds on the flowing back cylinder body pressure storage chamber is provided with first blow-off pipe, be provided with first blow-off valve on the first blow-off pipe.
Preferably, the distance between the sealing piston of the hydraulic cylinder and the sealing piece is greater than or equal to the distance between the position where the hydraulic cylinder drainage pipeline is connected with the drainage cylinder body and the sealing piece.
Preferably, a spring is arranged in the cylinder and is positioned on one side, far away from the sealing piece, of the cylinder sealing piston.
Preferably, one end of the spring abuts against one end, far away from the sealing element, of the cylinder, and the other end of the spring abuts against the sealing piston of the cylinder.
Preferably, a spring control valve is arranged on the cylinder and used for adjusting the compression degree of the spring.
Preferably, the sealing element is a gap bridge sliding sleeve seal or a gap bridge sealing ring; the first valve is a one-way valve or an electric control valve; the second valve is a one-way valve or an electric control valve; the control valve is a one-way valve or an electric control valve.
Preferably, a second pressure gauge is arranged on the exhaust pipeline of the cylinder; a third pressure gauge is arranged on the liquid discharge pipeline of the hydraulic cylinder; a second blow-off pipe is arranged on the liquid discharge cylinder body corresponding to the hydraulic cylinder, and a second blow-off valve is arranged on the second blow-off pipe; a safety valve is arranged on the liquid discharge cylinder body corresponding to the position of the hydraulic cylinder; the bottom of flowing back cylinder body is provided with the support frame.
When the intelligent casing gas recovery device provided by the invention is used, the oil pumping well is used for discharging liquid, the principle is shown in figure 1, when in upstroke, namely liquid is discharged, the discharged liquid flows out of the well cylinder and enters the liquid cylinder liquid discharging pipeline, the liquid cylinder sealing piston is pushed to move leftwards, when the liquid cylinder sealing piston reaches the tail end, the liquid cylinder is communicated with the liquid cylinder liquid discharging pipeline, and the produced liquid enters the oil collecting pipeline through the second one-way valve. Meanwhile, under the action of the connecting rod, the cylinder sealing piston and the hydraulic cylinder sealing piston synchronously move leftwards, the volume of the cylinder is enlarged, the pressure is reduced, negative pressure is formed, at the moment, the electric control valve is opened, and casing gas enters the cylinder through the cylinder gas inlet pipeline to complete the gas suction process. During the down stroke, namely when stopping flowing back, the liquid cylinder drainage pipeline department pressure drops, and electric control valve is closed this moment, and there is the pressure differential in cylinder and liquid cylinder drainage pipeline department, therefore, the synchronous right side of cylinder seal piston and liquid cylinder seal piston is gone, and the sleeve pipe gas in the compression cylinder passes through first check valve and discharges into the liquid cylinder drainage pipeline to when the upstroke again, mix with liquid and get into the oil collecting pipeline through the second check valve, realize the recovery of low pressure sleeve pipe gas. This sleeve pipe gas intelligence recovery unit has following advantage:
the recovery of sleeve gas is realized by utilizing the pressure change generated by an oil well pump in the working process of an oil pumping well, the energy is saved, the corresponding movement of the hydraulic cylinder sealing piston and the cylinder sealing piston forms buffering, the high-pressure impact degree instantly born by equipment is effectively reduced, and the equipment is not easy to damage.
Drawings
Fig. 1 is a flow chart of an intelligent casing gas recovery device provided by the present application;
FIG. 2 is a control flow chart of the intelligent casing gas recovery device provided by the invention;
reference numbers in the figures: the device comprises a hydraulic cylinder drainage pipeline 1, a safety valve 2, a hydraulic cylinder sealing piston 3, a hydraulic cylinder 4, a support frame 5, a hydraulic cylinder drainage pipeline 6, a second blow-off valve 7, a sealing element 8, a third pressure gauge 9, an electric control valve 10, a cylinder air inlet pipeline 11, a cylinder 12, a cylinder sealing piston 13, a first check valve 14, a second check valve 15, a second pressure gauge 16, a spring 17, a first pressure gauge 18, a first blow-off valve 19, a gas-liquid mixing outlet 20, a spring control valve 21, a drainage cylinder body 100, a cylinder exhaust pipeline 111, an oil collection pipeline 121 and a pressure recovery pipe 131.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. 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.
The invention provides an intelligent sleeve gas recovery device, which is shown in a figure 1: the sealing device comprises a liquid discharge cylinder body 100, wherein one end of the liquid discharge cylinder body is connected with a liquid discharge pipeline 1, a sealing element 8 is fixed in the liquid discharge cylinder body, and in the embodiment, the sealing element can be an existing sealing element, preferably a gap bridge sliding sleeve sealing element or a gap bridge sealing ring, so that the sealing effect is improved; the liquid discharge cylinder body is divided into an air cylinder 12 and a liquid cylinder 4 by the sealing piece, an air cylinder sealing piston 13 is arranged in the air cylinder, a liquid cylinder sealing piston 3 is arranged in the liquid discharge cylinder body, the air cylinder sealing piston and the liquid cylinder sealing piston are connected through a connecting rod, the connecting rod is in sliding connection with the sealing piece, and when the liquid discharge cylinder is manufactured, the connecting rod penetrates through the two ends of the sealing piece and is connected with the corresponding sealing piston; the liquid discharge cylinder body is connected with a liquid cylinder liquid discharge pipeline 6, an air cylinder exhaust pipeline 111 and an air cylinder air inlet pipeline 11, one end of the liquid cylinder liquid discharge pipeline is connected with the liquid discharge cylinder body, the connecting position of the liquid cylinder liquid discharge pipeline corresponds to that of a liquid cylinder, and the other end of the liquid cylinder liquid discharge pipeline is connected with an oil collection pipeline 121; one end of the cylinder exhaust pipeline is connected with the liquid discharge cylinder body, the connecting position of the cylinder exhaust pipeline is arranged corresponding to the cylinder, and the other end of the cylinder exhaust pipeline is connected with the liquid discharge pipeline of the hydraulic cylinder; a first one-way valve 14 is arranged on the cylinder exhaust pipeline and used for cylinder exhaust, a second one-way valve 15 is arranged on the oil collecting pipeline and used for liquid drainage of a hydraulic cylinder, an electric control valve 10 is arranged on the cylinder air inlet pipeline and used for cylinder air inlet, and a common electric control valve is arranged at an inlet of the cylinder and uses a pressure electric control valve; in an original state, a space is reserved between the hydraulic cylinder sealing piston and the sealing element, the position where the cylinder exhaust pipeline is connected with the liquid discharge cylinder body is located between the cylinder sealing piston and the sealing element, and a space is reserved between one end, far away from the sealing element, of the cylinder and the cylinder sealing piston.
When the intelligent casing gas recovery device is used, the oil is discharged from the pumping well, the principle of the intelligent casing gas recovery device is shown in fig. 1, when the oil is discharged in an upstroke, the discharged liquid flows out of the well casing and enters the liquid cylinder liquid discharge pipeline 1 to push the liquid cylinder sealing piston 3 to move leftwards, when the liquid cylinder sealing piston 3 reaches the tail end, the liquid cylinder 4 is communicated with the liquid cylinder liquid discharge pipeline 6, and the produced liquid enters the oil collection pipeline 121 through the second one-way valve 15. Meanwhile, under the action of the connecting rod, the cylinder sealing piston 13 and the hydraulic cylinder sealing piston 3 synchronously move leftwards, the volume of the cylinder 12 is enlarged, the pressure is reduced, negative pressure is formed, at the moment, the electric control valve is opened, and casing air enters the cylinder through the cylinder air inlet pipeline 11 to finish the air suction process. During the down stroke, namely when stopping liquid drainage, the pressure at the liquid cylinder liquid drainage pipeline 1 is reduced, at the moment, the electric control valve is closed, and the pressure difference exists between the air cylinder and the liquid cylinder liquid drainage pipeline 1, so that the air cylinder sealing piston 13 and the liquid cylinder sealing piston 3 move right synchronously, sleeve gas in the compression air cylinder 12 is discharged into the liquid cylinder liquid drainage pipeline 6 through the first one-way valve 14, and then is mixed with liquid to enter an oil collection pipeline through the second one-way valve 15 during the up stroke again, and the recovery of low-pressure sleeve gas is realized. This sleeve pipe gas intelligence recovery unit has following advantage:
the recovery of sleeve gas is realized by utilizing the pressure change generated by an oil well pump in the working process of an oil pumping well, the energy is saved, the hydraulic cylinder sealing piston 3 and the air cylinder sealing piston 13 correspondingly move to form buffering, the high-pressure impact degree instantly born by equipment is effectively reduced, and the equipment is not easy to damage.
It should be noted that the first one-way valve and the second one-way valve may also use electric control valves, as long as they are opened and closed at appropriate time.
In a preferred embodiment, a pressure storage cavity is formed between one end of the cylinder far away from the sealing element and the sealing piston of the cylinder, and a pressure recovery pipe 131 is arranged on the drainage cylinder body; one end of the pressure recovery pipe is connected with the liquid discharge cylinder body, and the connecting position of the pressure recovery pipe is arranged corresponding to the position of the pressure storage cavity; the other end of the pressure recovery pipe is connected with the oil collecting pipeline, the connecting position of the pressure recovery pipe is located on one side, away from the liquid drainage pipeline, of the second valve, a distance is reserved between the position, connected with the liquid drainage cylinder body, of the liquid cylinder and one end, away from the sealing element, of the liquid cylinder, and the position, connected with the liquid drainage cylinder body, of the general liquid cylinder is close to the sealing element. The structure can assist the hydraulic cylinder sealing piston 3 and the hydraulic cylinder sealing piston 13 to move in the using process, specifically, during the upstroke, the pressure in the oil collecting pipeline 121 is increased, part of liquid enters a pressure storage cavity through the oil collecting pipe to balance the pressure in the hydraulic cylinder, during the downstroke, due to the blocking of the second one-way valve, the pressure in the oil collecting pipeline 121 is continuously released to the pressure storage cavity to push the hydraulic cylinder sealing piston 13 and the hydraulic cylinder sealing piston 3 to move rightwards, so that the hydraulic cylinder sealing piston 3 can move to the left side of a liquid discharge port in a very short time, after the hydraulic cylinder sealing piston moves to the right side of the position where the hydraulic cylinder liquid discharge pipeline is connected with a liquid discharge cylinder body, negative pressure is generated in the hydraulic cylinder liquid discharge pipeline 6, further, sleeve gas in the cylinder is continuously discharged into the hydraulic cylinder liquid discharge pipeline 6 through the first one-way valve 14, and then is mixed with the liquid to enter the oil collecting pipeline through the second one-way valve 15 during the upstroke again, the recovery of low-pressure sleeve gas is realized, so that the structure further improves the recovery efficiency of the sleeve gas.
In actual use, during the down stroke, the oil well pump is full of the influence, and the volume of the well bore which is let out by the plunger is often larger than the volume of the fluid which enters the well pipe, so that the pressure drop at the position of the hydraulic cylinder drainage pipeline 1 is beneficial to increasing the pressure difference between the pressure storage cavity and the hydraulic cylinder drainage pipeline.
In actual manufacturing, a first pressure gauge 18 is arranged on the pressure recovery pipe so as to detect the pressure of the pressure recovery pipe; the oil collecting pipeline is provided with a gas-liquid mixing outlet 20, a gas-liquid mixing outlet valve is arranged at the gas-liquid mixing outlet, and the gas-liquid mixing outlet valve is positioned on one side of the pressure recovery pipe away from the liquid cylinder liquid discharge pipeline; the position of the liquid discharge cylinder body corresponding to the pressure storage cavity is provided with a first sewage discharge pipe, and the first sewage discharge pipe is provided with a first sewage discharge valve 19 so as to discharge sewage, which is well known to those skilled in the art and is not described herein again.
In one embodiment, the distance between the cylinder sealing piston and the sealing member is greater than or equal to the distance between the position where the cylinder drain line is connected to the drain cylinder and the sealing member, and particularly the distance between the cylinder sealing piston and the sealing member is greater than the distance between the position where the cylinder drain line is connected to the drain cylinder and the sealing member, the pressure storage chamber can store a large amount of energy during the up stroke, and the cylinder sealing piston 3 can be moved to the left of the position where the cylinder drain line 6 is connected to the drain cylinder during the down stroke, so that a negative pressure is generated in the cylinder drain line 6.
In one embodiment, a spring 17 is arranged in the cylinder, the spring is positioned on one side of the cylinder sealing piston, which is far away from the sealing element, namely in the pressure storage cavity, one end of the spring can be abutted against one end of the cylinder, which is far away from the sealing element, during manufacturing, and the other end of the spring is abutted against the cylinder sealing piston. Through setting up the spring like this, further improve buffering effect to mechanical energy's storage when improving the upstroke increases the speed that the sealed piston 3 of hydraulic cylinder removed when the downstroke, improves the work efficiency of equipment. When the preparation, can also be provided with spring control valve 21 on the cylinder, spring control valve is used for adjusting the compression degree of spring, spring control valve can use current structure, for example set up the support at flowing back cylinder body left end, it is connected with the regulation pole to rotate on the support, adjust pole and cylinder threaded connection, and extend to in the cylinder, the one end that the regulation pole is located the cylinder rotates and is connected with the push pedal, the spring is not connected with the push pedal with the one end that cylinder seal piston is connected or offsets, like this, can be according to the position of the pressure regulating spring of pressure storage intracavity and then adjust the home position of hydraulic cylinder seal piston 3, the degree that the spring compressed when changing the upstroke, thereby change the pressure in the pressure storage intracavity.
In order to facilitate detection and pollution discharge, a second pressure gauge 16 can be arranged on the exhaust pipeline of the cylinder; a third pressure gauge 9 is arranged on the liquid discharge pipeline of the hydraulic cylinder; a second blow-off pipe is arranged on the liquor drainage cylinder body corresponding to the hydraulic cylinder, and a second blow-off valve 7 is arranged on the second blow-off pipe; furthermore, a safety valve 2 can be arranged on the position, corresponding to the hydraulic cylinder, of the liquid discharge cylinder body so as to ensure the safe operation of the device; the bottom of flowing back cylinder body is provided with support frame 5.
In actual manufacturing, the device is generally set to be automatically controlled to achieve the purpose of maximizing the yield, specifically, the indicator diagram yield signal and the casing pressure signal are stored and compared with the yield, a reasonable casing pressure value signal is used as a control signal of an electric control valve of an air inlet pipeline of an air cylinder to fix the casing pressure in the range of the maximum yield, the control flow is as follows, referring to fig. 2, firstly, the yield Q0 corresponding to the current casing pressure value is obtained according to a target well indicator diagram, casing gas is recovered, when the casing pressure is reduced by 0.1MPa, the liquid yield Q1 corresponding to the current casing pressure is stored, if Q1 is greater than Q0, the casing gas is recovered continuously until Q1 is less than or equal to Q0, and then the casing pressure value corresponding to Q0 is the reasonable casing pressure value of the oil well.
The oil well yield of Q0 is used as a control signal for controlling the recovery pressure of the casing gas recovery device, and the control signal acts on the pressure electric control valve 10 at the inlet of the cylinder, so that the intelligent control of the oil well casing pressure with the maximum yield is achieved.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An intelligent sleeve gas recovery device comprises a liquid discharge cylinder body (100), one end of the liquid discharge cylinder body is connected with a liquid discharge pipeline (1) of a hydraulic cylinder, and is characterized in that,
a sealing element (8) is fixed in the liquid discharge cylinder body, the sealing element divides the liquid discharge cylinder body into a cylinder (12) and a hydraulic cylinder (4), a cylinder sealing piston (13) is arranged in the cylinder, a hydraulic cylinder sealing piston (3) is arranged in the liquid discharge cylinder body, the cylinder sealing piston and the hydraulic cylinder sealing piston are connected through a connecting rod, and the connecting rod is in sliding connection with the sealing element;
the liquid discharge cylinder body is connected with a liquid discharge pipeline (6), an air cylinder exhaust pipeline (111) and an air cylinder air inlet pipeline (11), one end of the liquid discharge pipeline is connected with the liquid discharge cylinder body, the connection position of the liquid discharge pipeline corresponds to that of the liquid cylinder, and the other end of the liquid discharge pipeline is connected with an oil collection pipeline (121);
one end of the cylinder exhaust pipeline is connected with the liquid discharge cylinder body, the connecting position of the cylinder exhaust pipeline is arranged corresponding to the cylinder, and the other end of the cylinder exhaust pipeline is connected with the liquid discharge pipeline of the hydraulic cylinder;
a first valve (14) is arranged on the cylinder exhaust pipeline and used for cylinder exhaust, a second valve (15) is arranged on the oil collecting pipeline and used for liquid drainage of a hydraulic cylinder, and a control valve (10) is arranged on the cylinder air inlet pipeline and used for cylinder air inlet;
in an original state, a space is reserved between the hydraulic cylinder sealing piston and the sealing element, the position where the cylinder exhaust pipeline is connected with the liquid discharge cylinder body is located between the cylinder sealing piston and the sealing element, and a space is reserved between one end, far away from the sealing element, of the cylinder and the cylinder sealing piston.
2. The intelligent casing gas recovery device according to claim 1, wherein a pressure storage cavity is formed between one end of the cylinder, which is far away from the sealing element, and the cylinder sealing piston, and a pressure recovery pipe (131) is arranged on the drainage cylinder body;
one end of the pressure recovery pipe is connected with the liquid discharge cylinder body, and the connecting position of the pressure recovery pipe is arranged corresponding to the position of the pressure storage cavity;
the other end of the pressure recovery pipe is connected with the oil collecting pipeline, and the connection position is positioned on one side, away from the liquid drainage pipeline, of the second valve;
and a distance is reserved between the position where the liquid cylinder liquid discharge pipeline is connected with the liquid discharge cylinder body and one end of the liquid cylinder, which is far away from the sealing element.
3. The intelligent casing gas recovery device according to claim 2, wherein the position where the hydraulic cylinder drain line is connected with the drain cylinder body is arranged close to the sealing member.
4. The intelligent casing gas recovery device according to claim 2, wherein a first pressure gauge (18) is arranged on the pressure recovery pipe;
a gas-liquid mixing outlet (20) is arranged on the oil collecting pipeline, a gas-liquid mixing outlet valve is mounted at the gas-liquid mixing outlet, and the gas-liquid mixing outlet valve is positioned on one side of the pressure recovery pipe, which is far away from the liquid cylinder drainage pipeline;
the position that corresponds on the flowing back cylinder body pressure storage chamber is provided with first blow-off pipe, be provided with first blow-off valve (19) on the first blow-off pipe.
5. The intelligent casing gas recovery device according to claim 1, wherein the distance between the hydraulic cylinder sealing piston and the sealing element is greater than or equal to the distance between the position where the hydraulic cylinder drainage line is connected with the drainage cylinder and the sealing element.
6. A casing gas intelligent recovery device according to any one of claims 1-5, characterized in that a spring (17) is arranged in the cylinder, and the spring is positioned on the side of the cylinder sealing piston far away from the sealing element.
7. The intelligent casing gas recovery device according to claim 6, wherein one end of the spring abuts against one end of the cylinder, which is far away from the sealing element, and the other end of the spring abuts against the sealing piston of the cylinder.
8. The intelligent casing gas recovery device according to claim 6, wherein a spring control valve (21) is arranged on the cylinder, and the spring control valve is used for adjusting the compression degree of the spring.
9. The intelligent casing gas recovery device according to claim 1, wherein the sealing element is a gap bridge sliding sleeve seal or a gap bridge sealing ring;
the first valve is a one-way valve or an electric control valve;
the second valve is a one-way valve or an electric control valve;
the control valve is a one-way valve or an electric control valve.
10. The intelligent casing gas recovery device according to claim 1, wherein a second pressure gauge (16) is arranged on the cylinder exhaust pipeline;
a third pressure gauge (9) is arranged on the liquid discharge pipeline of the hydraulic cylinder;
a second blow-off pipe is arranged on the liquid discharge cylinder body corresponding to the hydraulic cylinder, and a second blow-off valve (7) is arranged on the second blow-off pipe;
a safety valve (2) is arranged on the liquid discharge cylinder body corresponding to the position of the liquid cylinder;
the bottom of flowing back cylinder body is provided with support frame (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267309.1A CN114592830A (en) | 2022-03-18 | 2022-03-18 | Intelligent sleeve gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267309.1A CN114592830A (en) | 2022-03-18 | 2022-03-18 | Intelligent sleeve gas recovery device |
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| Publication Number | Publication Date |
|---|---|
| CN114592830A true CN114592830A (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210267309.1A Pending CN114592830A (en) | 2022-03-18 | 2022-03-18 | Intelligent sleeve gas recovery device |
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| Country | Link |
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| CN (1) | CN114592830A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293340B1 (en) * | 1997-05-08 | 2001-09-25 | Chenglin Wu | Gas-lift-ball control device and oil producing method using said device |
| CN203081409U (en) * | 2013-02-20 | 2013-07-24 | 张军 | Auto-control oil well casing gas recovery device |
| CN103244077A (en) * | 2012-02-06 | 2013-08-14 | 中国石油化工股份有限公司 | Crude oil dissolved gas underground collecting apparatus |
| CN203702098U (en) * | 2013-12-27 | 2014-07-09 | 檀长江 | Self-control type oil well casing gas recovery unit |
| CN105178919A (en) * | 2015-10-09 | 2015-12-23 | 檀长江 | Self-controlled oil well casing gas recycling device |
| CN205743857U (en) * | 2016-07-11 | 2016-11-30 | 李青坤 | Hydraulic feedback formula casing gas recovering device |
| CN112523728A (en) * | 2021-02-09 | 2021-03-19 | 山东鼎点环保科技有限公司 | Sleeve gas recovery device |
-
2022
- 2022-03-18 CN CN202210267309.1A patent/CN114592830A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293340B1 (en) * | 1997-05-08 | 2001-09-25 | Chenglin Wu | Gas-lift-ball control device and oil producing method using said device |
| CN103244077A (en) * | 2012-02-06 | 2013-08-14 | 中国石油化工股份有限公司 | Crude oil dissolved gas underground collecting apparatus |
| CN203081409U (en) * | 2013-02-20 | 2013-07-24 | 张军 | Auto-control oil well casing gas recovery device |
| CN203702098U (en) * | 2013-12-27 | 2014-07-09 | 檀长江 | Self-control type oil well casing gas recovery unit |
| CN105178919A (en) * | 2015-10-09 | 2015-12-23 | 檀长江 | Self-controlled oil well casing gas recycling device |
| CN205743857U (en) * | 2016-07-11 | 2016-11-30 | 李青坤 | Hydraulic feedback formula casing gas recovering device |
| CN112523728A (en) * | 2021-02-09 | 2021-03-19 | 山东鼎点环保科技有限公司 | Sleeve gas recovery device |
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