CN119244202B - Deep well gas production pipe internal jet drainage device and use method - Google Patents

Deep well gas production pipe internal jet drainage device and use method Download PDF

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Publication number
CN119244202B
CN119244202B CN202411521272.6A CN202411521272A CN119244202B CN 119244202 B CN119244202 B CN 119244202B CN 202411521272 A CN202411521272 A CN 202411521272A CN 119244202 B CN119244202 B CN 119244202B
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pump
oil pipe
pressure
gas
liquid
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CN119244202A (en
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高俊民
张广卿
李永泰
张景南
褚金波
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Shandong Chenglin Petroleum Engineering Technology Co ltd
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Shandong Chenglin Petroleum Engineering Technology Co ltd
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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
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention relates to the technical field of oil and gas well exploitation, in particular to a jet drainage device in a deep well gas production pipe column and a use method thereof. The technical scheme is that a lower pressure-controlled switch jet suction pump and a reverse circulation drainage pump are connected in an oil pipe through a small-diameter oil pipe, the pressure-controlled switch jet suction pump is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump is positioned at the lower part of the oil-gas well, a packer is arranged below the reverse circulation drainage pump, and a single-flow valve is arranged at the bottom of the reverse circulation drainage pump; the method comprises the steps of injecting high-pressure gas into a small-diameter oil pipe, discharging water in the upper pipe column of a jet suction pump of a pressure-controlled switch, moving a sliding sleeve to close a mixed liquid outlet after the water is emptied, injecting high-pressure gas into an annulus between a sleeve and the oil pipe, discharging water in the upper pipe column of a reverse circulation drainage pump, lifting liquid in the pipe column by multistage relay jet, and discharging accumulated water at the bottom of a well and water stored in the pipe column to the ground, so that the back pressure at the bottom of the well is effectively reduced, water blockage and water lock are relieved, and the productivity of a gas well is recovered.

Description

Jet drainage device in deep well gas production pipe column and use method
Technical Field
The invention relates to the technical field of oil and gas well exploitation, in particular to a jet drainage device in a deep well gas production pipe column and a use method thereof.
Background
In the exploitation process of a deep gas well, the carrying and clearing effect of produced gas on accumulated water at the bottom of the well is gradually weakened along with the gradual decrease of formation pressure and the increase of water yield, so that the produced gas is gradually reduced or stopped, especially, the deep well, the ultra-deep well, the well which is easy to water lock and is highly corroded and poisonous gas and is not suitable for being lifted out of an existing gas production string in the well are limited by factors such as the drift diameter, the accumulated water depth at the bottom of the well, the formation pressure and the like in the production string in the well, the existing drainage and water blocking technology such as bubble drainage, plunger drainage, gas lift, submersible electric pump drainage, submersible screw pump drainage, rod pump drainage and the like are difficult to adapt to the requirements of later development stages in the well, and part of the well is gradually in a low-production low-efficiency or forced shut-in state, so that a new, more economical and effective device for draining and producing gas from the existing production string in the well is required.
Disclosure of Invention
The invention aims at overcoming the defects existing in the prior art, and provides a jet flow drainage device in a deep well gas production pipe column and a use method thereof, the liquid in the pipe column is lifted by the multistage relay jet flow, and accumulated water at the bottom of the well is discharged to the ground, so that the back pressure at the bottom of the well is effectively reduced, the water blockage and the water lock are relieved, and the productivity of the gas well is recovered.
The invention relates to an internal jet drainage device of a deep well gas production pipe column, which comprises a sleeve, an oil pipe and a reverse circulation drainage pump, wherein the oil pipe is internally connected with a lower pressure-controlled switch jet suction pump and the reverse circulation drainage pump through a small-diameter oil pipe, the pressure-controlled switch jet suction pump is positioned at the middle upper part of an oil gas well, the reverse circulation drainage pump is positioned at the lower part of the oil gas well, a packer is arranged below the reverse circulation drainage pump, a check valve is arranged at the bottom, the pressure-controlled switch jet suction pump comprises a floating pump core, a pump barrel, a first spring and a sliding sleeve, the floating pump core is arranged in the pump barrel, the first spring and the sliding sleeve are arranged outside the pump barrel, the on-off control of a mixed liquid outlet is realized through the sliding sleeve, the high-pressure gas is injected into the small-diameter oil pipe, the water in the pipe column at the upper part of the pressure-controlled switch jet pump is drained, the sliding sleeve moves to close the mixed liquid outlet after the drainage pump is emptied, and the high-pressure gas is injected into an annulus between the sleeve and the oil pipe to drain the water in the pipe column at the upper part of the reverse circulation drainage pump.
Preferably, the pressure-controlled switch jet suction pump further comprises a first nozzle, a first throat pipe and a liquid inlet valve, wherein a supporting step is arranged on the upper portion of the inner wall of the pump barrel and is connected with the upper portion of the floating pump core in a matched mode, a first fishing head is installed at the top of the floating pump core, a first inlet is installed on the upper side of the floating pump core, the first nozzle is arranged on the lower portion of the floating pump core, the first throat pipe is arranged below the first nozzle, the lower portion of the first throat pipe is communicated with a diffusion cavity, a mixed liquid outlet is formed in the lower portion of the diffusion cavity, and the liquid inlet valve is installed at the lower end of the pump barrel.
Preferably, the reverse circulation drainage pump comprises a pump body, a second throat pipe, a second nozzle and a second power liquid inlet, wherein the second power liquid inlet is arranged at the lower side of the pump body and communicated with the second nozzle in the inner cavity of the pump body, the second throat pipe is arranged above the second nozzle, a liquid outlet is arranged at the top of the pump body, a liquid inlet is arranged at the bottom of the pump body, and a second leather cup is arranged at the outer side of the liquid inlet.
The invention relates to another jet drainage device in a deep well gas production pipe column, which adopts the technical scheme that the floating pump core comprises a circular spraying cylinder, a circular throat cylinder, a second fishing head, a supporting cylinder and a positioning cylinder, wherein the lower part of the second fishing head is connected with the circular spraying cylinder, the lower part of the circular spraying cylinder is connected with the supporting cylinder through the circular throat cylinder, the positioning cylinder is arranged at the lower end of the supporting cylinder, the outer diameter of the circular spraying cylinder is larger than the outer diameter of the circular throat cylinder, and the outer diameter of the supporting cylinder is larger than the outer diameter of the positioning cylinder.
Preferably, the annular spraying cylinder and the inner wall of the pump cylinder form a first nozzle of an annular spraying structure, the annular throat cylinder and the inner wall of the pump cylinder form a first throat of the annular spraying structure, a diffusion cavity is arranged below the first throat, a liquid inlet channel is arranged on one side of the inner wall of the pump cylinder, the lower end of the liquid inlet channel is connected with a stratum liquid inlet, the upper end of the liquid inlet channel is communicated with the lower portion of the first nozzle of the annular spraying structure, stratum liquid is mixed with power liquid from the upper portion and then discharged along a mixed liquid outlet arranged on the outer wall of the pump cylinder after passing through the first throat and the diffusion cavity.
The invention relates to another jet drainage device in a deep well gas production pipe column, which has the technical scheme that: and a one-way pressure-controlled bleeder is arranged on the small-diameter oil pipe between the pressure-controlled switch jet suction pump and the reverse circulation drainage pump.
Preferably, the unidirectional pressure-controlled bleeder comprises a bleeder main body, an inner sliding sleeve, a bleeder hole, a second spring, an upper joint and a lower joint, wherein the upper joint is arranged at the upper end of the bleeder main body, the lower joint is arranged at the lower end of the bleeder main body, the bleeder hole is arranged at the middle upper part of the bleeder main body, the inner sliding sleeve and the second spring are arranged in the inner cavity of the bleeder main body, the second spring is connected at the lower end of the inner sliding sleeve, and a boss structure is arranged at the lower part of the inner sliding sleeve.
Preferably, the inner diameter of the upper part of the inner wall of the bleeder main body is smaller than the inner diameter of the lower part, an adjusting ring is arranged on the lower part of the inner wall of the bleeder main body, and the upper part of the adjusting ring is connected with the lower end of the second spring.
The invention relates to a use method of a jet drainage device in a deep well gas production pipe column, which comprises the following steps:
Firstly, connecting a lower pressure-controlled switch jet suction pump and a reverse circulation drainage pump in an oil pipe through a small-diameter oil pipe, wherein the pressure-controlled switch jet suction pump is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump is positioned at the lower part of the oil-gas well, and a packer is set;
Secondly, adjusting a wellhead and a ground gas injection flow, injecting high-pressure gas into the small-diameter oil pipe, enabling the high-pressure gas to enter a floating pump core of a pressure-controlled switch jet suction pump along a first inlet, then spraying the high-pressure gas along a first nozzle, driving liquid entering from a liquid inlet valve to be mixed in a first throat pipe gas-liquid mode, discharging the liquid to an annulus between the floating pump core and a pump barrel downwards along a diffusion cavity through a mixed liquid outlet, opening a sliding sleeve, discharging the liquid to the annulus between the small-diameter oil pipe and the oil pipe through a mixed liquid outlet on the outer wall of the pump barrel, and lifting a gas-liquid mixture to the ground upwards until the annulus between the small-diameter oil pipe and the oil pipe is emptied, so that liquid at the upper part of the pressure-controlled switch jet suction pump is emptied;
thirdly, injecting high-pressure gas into an annulus between the oil pipe and the small-diameter oil pipe through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe below the pressure-controlled switch jet suction pump and the small-diameter oil pipe to move downwards, injecting the liquid into a second nozzle through a second power liquid inlet of a reverse circulation drainage pump at a deep well to drive stratum liquid at a liquid inlet to be mixed, discharging the mixed liquid upwards through a liquid outlet along a second throat, and enabling the mixed liquid to enter a pump cylinder upwards along the small-diameter oil pipe through a liquid inlet valve of the pressure-controlled switch jet suction pump, wherein at the moment, a sliding sleeve is in a closed state, and a liquid mixture is discharged upwards along the pump cylinder and a floating pump core until the liquid is discharged to the ground, so that all the liquid in an inner cavity of the oil pipe is replaced;
fourthly, the injection of high-pressure gas is stopped at the moment, and the gas production top-open check valve is opened to output to the ground along the oil pipe under the pressure action of the gas production stratum due to the complete emptying of the liquid in the inner cavity of the oil pipe, so that the gas production of the deep well is recovered.
The invention relates to a use method of a jet drainage device in a deep well gas production pipe column, which comprises the following steps:
Firstly, connecting a lower pressure-controlled switch jet suction pump and a reverse circulation drainage pump in an oil pipe through a small-diameter oil pipe, wherein the pressure-controlled switch jet suction pump is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump is positioned at the lower part of the oil-gas well, and a packer is set;
Secondly, adjusting a wellhead and a ground gas injection flow, injecting high-pressure gas into the small-diameter oil pipe, enabling the high-pressure gas to enter a floating pump core of a pressure-controlled switch jet suction pump along a first inlet, then spraying the high-pressure gas along a first nozzle, driving liquid entering from a liquid inlet valve to be mixed in a first throat pipe gas-liquid mode, discharging the liquid to an annulus between the floating pump core and a pump barrel downwards along a diffusion cavity through a mixed liquid outlet, opening a sliding sleeve, discharging the liquid to the annulus between the small-diameter oil pipe and the oil pipe through a mixed liquid outlet on the outer wall of the pump barrel, and lifting a gas-liquid mixture to the ground upwards until the annulus between the small-diameter oil pipe and the oil pipe is emptied, so that liquid at the upper part of the pressure-controlled switch jet suction pump is emptied;
Thirdly, injecting high-pressure gas into an annulus between the oil pipe and the small-diameter oil pipe through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe below the pressure-controlled switch jet suction pump and the small-diameter oil pipe to move downwards, entering through a discharge hole of the one-way pressure-controlled bleeder, pushing the inner sliding sleeve to be opened, pushing the liquid in the inner cavity of the small-diameter oil pipe above the one-way pressure-controlled bleeder to be discharged upwards, entering the pump cylinder through a liquid inlet valve of the pressure-controlled switch jet suction pump, and at the moment, enabling the sliding sleeve to be in a closed state, and discharging the liquid mixture upwards along the pump cylinder and the floating pump core until the liquid is discharged to the ground, thereby completing the replacement of the liquid in the oil pipe above the one-way pressure-controlled bleeder and the inner cavity of the small-diameter oil pipe;
Fourthly, injecting high-pressure gas into an annulus between the oil pipe and the small-diameter oil pipe through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe below the pressure-controlled switch jet suction pump and the small-diameter oil pipe to move downwards, injecting the liquid into a second nozzle through a second power liquid inlet of a reverse circulation drainage pump at a deep well to drive stratum liquid at a liquid inlet to be mixed, discharging the mixed liquid upwards through a liquid outlet along a second throat, upwards along the small-diameter oil pipe, upwards passing through a lower joint of a one-way pressure-controlled bleeder, at the moment, enabling an inner sliding sleeve to be in a closed state, upwards discharging a liquid mixture along an inner cavity of a bleeder main body, continuously upwards along the small-diameter oil pipe, and entering a pump cylinder through a liquid inlet valve of the pressure-controlled switch jet suction pump, at the moment, enabling a sliding sleeve to be in a closed state, upwards discharging the liquid mixture along the pump cylinder and a floating pump core until the mixed liquid is discharged to the ground, and all the liquid in the inner cavity of the oil pipe is replaced;
fifth, the injection of high-pressure gas is stopped at this time, and because the liquid in the inner cavity of the oil pipe is completely emptied, under the pressure action of the gas producing stratum, the gas producing jack-up check valve is opened to produce to the ground along the oil pipe, and the gas production of the deep well is restored.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, on the premise that the existing gas production pipe column of the gas well is not required to be used, the pressure-controlled switch jet suction pump and the reverse circulation drainage pump are connected by adopting the small-diameter oil pipe, high-pressure gas is introduced to empty water of the pipe column at the upper part of the pressure-controlled switch jet suction pump, and then high-pressure gas is introduced to replace water of the pipe column at the upper part of the reverse circulation drainage pump, so that the production of the gas production of the deep well is restored, and the alternate circulation of drainage and gas production of the deep gas well can be realized under the condition of avoiding the underground pipe column;
2. In addition, the floating pump core with the upper part thick and the lower part thin is adopted, so that the floating pump core can float upwards to a certain position during backwashing, thereby enlarging a backwashing flow passage, reducing the resistance of the floating pump core, ensuring the speed of backwashing to be high and reducing the pressure of backwashing construction;
3. The pressure-controlled switch jet suction pump adopted by the invention can also be designed into a circular spray structure, has novel structure, small liquid-gas flow resistance, easy casting and fishing of a floating pump core of the jet pump, convenient operation and management and low cost, and is also beneficial to improving the repair-free period of a gas well;
4. According to the invention, the unidirectional pressure-controlled bleeder is added between the pressure-controlled switch jet suction pump and the reverse circulation drainage pump, so that the liquid between the pressure-controlled switch jet suction pump and the reverse circulation drainage pump can be discharged twice, and the energy consumption is reduced;
5. The invention can be used for deep gas wells, such as wells greater than 3500 meters, even deep wells of 5000-6000 meters, and can also be used for drainage of middle shallow wells, such as middle shallow wells smaller than 3500 meters, drainage and gas production of coal-bed gas wells, and can be used in gas production columns of 2-7/8, 3-1/2 and 4 inches and above, and is more suitable for new well application of the gas production columns which are not yet lowered.
Drawings
FIG. 1 is a schematic view of a first construction principle of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a pressure controlled switching jet suction pump;
FIG. 3 is a schematic diagram of a second embodiment of a pressure controlled switching jet suction pump;
FIG. 4 is a schematic diagram of the construction of the reverse circulation drain pump;
FIG. 5 is a schematic illustration of another construction principle of the present invention;
FIG. 6 is a schematic diagram of the one-way pressure controlled bleeder of FIG. 5;
In the upper diagram, a sleeve 1, an oil pipe 2, a small-diameter oil pipe 3, a pressure-controlled switch jet suction pump 4, a reverse circulation drainage pump 5, a packer 6, a check valve 7, a gas producing stratum 8 and a one-way pressure-controlled bleeder 9;
The floating pump core 4.1, the first leather cup 4.2, the pump cylinder 4.3, the first nozzle 4.4, the first throat 4.5, the first spring 4.6, the sliding sleeve 4.7, the liquid inlet valve 4.8, the mixed liquid outlet 4.9, the first bailing head 4.10, the liquid inlet channel 4.11, the stratum liquid inlet 4.12, the diffusion cavity 4.13, the annular spraying cylinder 4.1.1, the annular throat cylinder 4.1.2, the second bailing head 4.1.3, the support cylinder 4.1.4, the positioning cylinder 4.1.5, the first inlet 4.14 and the support step 4.3.1;
The pump body 5.1, the second throat pipe 5.2, the second nozzle 5.3, the second power liquid inlet 5.4, the second leather cup 5.5, the liquid outlet 5.6 and the liquid inlet 5.7;
The bleeder body 9.1, the inner slide sleeve 9.2, the bleeder hole 9.3, the second spring 9.4, the adjusting ring 9.5, the upper joint 9.6 and the lower joint 9.7.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In the embodiment 1, referring to fig. 1,2 and 4, the jet drainage device in a deep well gas production pipe column comprises a sleeve 1, an oil pipe 2 and a reverse circulation drainage pump 5, wherein a lower pressure-controlled switch jet suction pump 4 and the reverse circulation drainage pump 5 are connected in the oil pipe 2 through a small-diameter oil pipe 3, the pressure-controlled switch jet suction pump 4 is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump 5 is positioned at the lower part of the oil-gas well, a packer 6 is arranged below the reverse circulation drainage pump 5, a single-flow valve 7 is arranged at the bottom, the pressure-controlled switch jet suction pump 4 comprises a floating pump core 4.1, a pump cylinder 4.3, a first spring 4.6 and a sliding sleeve 4.7, the floating pump core 4.1 is arranged in the pump cylinder 4.3, the first spring 4.6 and the sliding sleeve 4.7 are arranged outside the pump cylinder 4.3, the mixed liquid outlet 4.9 is controlled by the switch, the high-pressure gas is injected into the small-diameter oil pipe 3, the water in the upper pipe column of the pressure-controlled switch suction pump 4 is discharged, the water in the pipe column is moved after the water is emptied, and the mixed liquid outlet 4.9 is discharged into the annulus between the high-pressure pipe 2 and the water pump and the annulus is discharged out of the sleeve 2.
Referring to fig. 2, the pressure-controlled switch jet suction pump 4 further comprises a first nozzle 4.4, a first throat pipe 4.5 and a liquid inlet valve 4.8, wherein a supporting step 4.3.1 is arranged at the upper part of the inner wall of the pump cylinder 4.3 and is connected with the upper bulge of the floating pump core 4.1 in a matched manner, the outer diameter of the upper part of the floating pump core 4.1 is larger than that of the lower part, so that the floating pump core 4.1 can float upwards to a bit in the backwashing process, a backwashing flow channel is enlarged, the resistance of the floating pump core 4.1 is reduced, the backwashing speed is increased, and the backwashing construction pressure is reduced;
The top at floating pump core 4.1 installs first beat and drag for head 4.10, and first import 4.14 is installed to the upside of floating pump core 4.1, and the lower part of floating pump core 4.1 is equipped with first nozzle 4.4, and the below of first nozzle 4.4 is equipped with first venturi 4.5, and diffusion chamber 4.13 is communicated to the lower part of first venturi 4.5, and the lower part of diffusion chamber 4.13 is equipped with mixed liquid export 4.9, installs feed liquor valve 4.8 at the lower extreme of pump barrel 4.3.
Referring to fig. 4, the reverse circulation drain pump 5 of the present invention includes a pump body 5.1, a second throat 5.2, a second nozzle 5.3, and a second power fluid inlet 5.4, wherein the second power fluid inlet 5.4 is disposed at the lower side of the pump body 5.1, the second power fluid inlet 5.4 is connected to the second nozzle 5.3 in the inner cavity of the pump body 5.1, the second throat 5.2 is disposed above the second nozzle 5.3, a drain port 5.6 is disposed at the top of the pump body 5.1, a liquid inlet 5.7 is disposed at the bottom of the pump body 5.1, and a second leather cup 5.5 is mounted at the outer side of the liquid inlet 5.7.
The invention relates to a use method of a jet drainage device in a deep well gas production pipe column, which comprises the following steps:
Firstly, connecting a lower pressure-controlled switch jet suction pump 4 and a reverse circulation drainage pump 5 in an oil pipe 2 through a small-diameter oil pipe 3, wherein the pressure-controlled switch jet suction pump 4 is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump 5 is positioned at the lower part of the oil-gas well, and a packer 6 is set;
Secondly, adjusting a wellhead and a ground gas injection flow, injecting high-pressure gas into the small-diameter oil pipe 3, enabling the high-pressure gas to enter a floating pump core 4.1 of a pressure-controlled switch jet suction pump 4 along a first inlet 4.14, then spraying out along a first nozzle 4.4, driving liquid entering from a liquid inlet valve 4.8 to be mixed in a first throat 4.5 gas-liquid manner, discharging the liquid downwards along a diffusion cavity 4.13 to an annulus between the floating pump core 4.1 and a pump cylinder 4.3 through a mixed liquid outlet 4.9, opening a sliding sleeve 4.7, discharging the liquid mixture to the annulus between the small-diameter oil pipe 3 and an oil pipe 2 through the mixed liquid outlet 4.9 on the outer wall of the pump cylinder 4.3, lifting the gas-liquid mixture up to the ground until the annulus between the small-diameter oil pipe 3 and the oil pipe 2 is emptied, and then closing the mixed liquid outlet 4.9 under the action of the first spring 4.6 after the liquid is emptied;
thirdly, injecting high-pressure gas into the annulus between the oil pipe 2 and the small-diameter oil pipe 3 through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe 2 below the pressure-controlled switch jet suction pump 4 and the small-diameter oil pipe 3 to move downwards, enabling the liquid to enter a second nozzle 5.3 through a second power liquid inlet 5.4 of a reverse circulation drainage pump 5 at a deep well to be sprayed out, driving stratum liquid at a liquid inlet 5.7 to be mixed, upwards discharging the stratum liquid through a liquid outlet 5.6 along a second throat 5.2, enabling the mixed liquid to upwards enter a pump cylinder 4.3 through a liquid inlet valve 4.8 of the pressure-controlled switch jet suction pump 4, enabling a sliding sleeve 4.7 to be in a closed state, and enabling the liquid mixture to upwards discharge along the pump cylinder 4.3 and a floating pump core 4.1 until the liquid in the inner cavity of the oil pipe 2 is completely replaced;
Fourthly, the injection of high-pressure gas is stopped at the moment, and because the liquid in the inner cavity of the oil pipe 2 is completely emptied, under the pressure action of the gas producing stratum 8, the gas producing jack-up check valve 7 is opened to produce to the ground along the oil pipe 2, and the gas production of the deep well is restored.
In embodiment 2, referring to fig. 3, another jet drainage device in a deep well gas production string according to the present invention is provided, where the floating pump core 4.1 includes a jet grouting cylinder 4.1.1, a throat cylinder 4.1.2, a second fishing head 4.1.3, a supporting cylinder 4.1.4, and a positioning cylinder 4.1.5, the lower part of the second fishing head 4.1.3 is connected to the jet grouting cylinder 4.1.1, the lower part of the jet grouting cylinder 4.1.1 is connected to the supporting cylinder 4.1.4 through the throat cylinder 4.1.2, the positioning cylinder 4.1.5 is provided at the lower end of the supporting cylinder 4.1.4, and the outer diameter of the jet grouting cylinder 4.1.1 is greater than the outer diameter of the throat cylinder 4.1.2, and the outer diameter of the supporting cylinder 4.1.4 is greater than the outer diameter of the positioning cylinder 4.1.5.
The first nozzle 4.4 of the annular spraying structure is formed by the annular spraying cylinder 4.1.1 and the inner wall of the pump cylinder 4.3, the lower part of the second fishing head 4.1.3 is provided with the first leather cup 4.2, the annular throat cylinder 4.1.2 and the inner wall of the pump cylinder 4.3 form the first throat 4.5 of the annular spraying structure, the diffusion cavity 4.13 is arranged below the first throat 4.5, the liquid inlet 4.11 is arranged on one side of the inner wall of the pump cylinder 4.3, the lower end of the liquid inlet 4.11 is connected with the stratum liquid inlet 4.12, the upper end of the stratum liquid is communicated to the lower part of the first nozzle 4.4 of the annular spraying structure, and after the stratum liquid is mixed with the power liquid from the upper part, the stratum liquid is discharged along the mixed liquid outlet 4.9 arranged on the outer wall of the pump cylinder 4.3 after passing through the first throat 4.5 and the diffusion cavity 4.13.
Compared with the embodiment 1, the embodiment adopts a ring spraying structure, has better sand prevention effect, and avoids sand from blocking the first nozzle 4.4.
In embodiment 3, referring to fig. 5, another jet drainage device in a deep well gas production string according to the present invention has the technical scheme that a unidirectional pressure-controlled bleeder 9 is installed on a small-diameter oil pipe 3 between a pressure-controlled switch jet suction pump 4 and a reverse circulation drainage pump 5.
Referring to fig. 6, the unidirectional pressure-controlled bleeder 9 of the present invention comprises a bleeder main body 9.1, an inner sliding sleeve 9.2, a bleeder hole 9.3, a second spring 9.4, an upper joint 9.6 and a lower joint 9.7, wherein the upper end of the bleeder main body 9.1 is provided with the upper joint 9.6, the lower end is provided with the lower joint 9.7, the bleeder main body 9.1 is provided with the bleeder hole 9.3 at the middle upper part, the inner cavity of the bleeder main body 9.1 is provided with the inner sliding sleeve 9.2 and the second spring 9.4, the lower end of the inner sliding sleeve 9.2 is connected with the second spring 9.4, and the lower part of the inner sliding sleeve 9.2 is provided with a boss structure.
The inner diameter of the upper part of the inner wall of the bleeder main body 9.1 is smaller than the inner diameter of the lower part, the lower part of the inner wall of the bleeder main body 9.1 is provided with an adjusting ring 9.5, and the upper part of the adjusting ring 9.5 is connected with the lower end of the second spring 9.4.
The invention relates to a use method of a jet drainage device in a deep well gas production pipe column, which comprises the following steps:
Firstly, connecting a lower pressure-controlled switch jet suction pump 4 and a reverse circulation drainage pump 5 in an oil pipe 2 through a small-diameter oil pipe 3, wherein the pressure-controlled switch jet suction pump 4 is positioned at the middle upper part of an oil-gas well, the reverse circulation drainage pump 5 is positioned at the lower part of the oil-gas well, and a packer 6 is set;
Secondly, adjusting a wellhead and a ground gas injection flow, injecting high-pressure gas into the small-diameter oil pipe 3, enabling the high-pressure gas to enter a floating pump core 4.1 of a pressure-controlled switch jet suction pump 4 along a first inlet 4.14, then spraying out along a first nozzle 4.4, driving liquid entering from a liquid inlet valve 4.8 to be mixed in a first throat 4.5 gas-liquid manner, discharging the liquid downwards along a diffusion cavity 4.13 to an annulus between the floating pump core 4.1 and a pump cylinder 4.3 through a mixed liquid outlet 4.9, opening a sliding sleeve 4.7, discharging the liquid mixture to the annulus between the small-diameter oil pipe 3 and an oil pipe 2 through the mixed liquid outlet 4.9 on the outer wall of the pump cylinder 4.3, lifting the gas-liquid mixture up to the ground until the annulus between the small-diameter oil pipe 3 and the oil pipe 2 is emptied, and then closing the mixed liquid outlet 4.9 under the action of the first spring 4.6 after the liquid is emptied;
thirdly, injecting high-pressure gas into an annulus between the oil pipe 2 and the small-diameter oil pipe 3 through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe 2 below the pressure-controlled switch jet suction pump 4 and the small-diameter oil pipe 3 to move downwards, entering through a discharge hole 9.3 of the unidirectional pressure-controlled bleeder 9, pushing the inner sliding sleeve 9.2 to be opened, pushing the liquid in the inner cavity of the small-diameter oil pipe 3 above the unidirectional pressure-controlled bleeder 9 to be discharged upwards, entering into the pump cylinder 4.3 through a liquid inlet valve 4.8 of the pressure-controlled switch jet suction pump 4, at the moment, enabling the sliding sleeve 4.7 to be in a closed state, and discharging the liquid mixture upwards along the pump cylinder 4.3 and the floating pump core 4.1 until the liquid is discharged to the ground, and completing the replacement of the liquid in the inner cavities of the oil pipe 2 and the small-diameter oil pipe 3 above the unidirectional pressure-controlled bleeder 9;
fourthly, injecting high-pressure gas into the annulus between the oil pipe 2 and the small-diameter oil pipe 3 through a ground gas injection flow, continuously pushing the liquid in the annulus between the oil pipe 2 below the pressure-controlled switch jet suction pump 4 and the small-diameter oil pipe 3 to move downwards, enabling the liquid to enter the second nozzle 5.3 through the second power liquid inlet 5.4 of the reverse circulation drainage pump 5 at the deep well to be sprayed out, driving stratum liquid at the liquid inlet 5.7 to be mixed, upwards discharging the mixed liquid through the liquid outlet 5.6 along the second throat 5.2, upwards along the small-diameter oil pipe 3, upwards discharging the liquid mixture through the lower joint 9.7 of the unidirectional pressure-controlled bleeder 9, wherein the inner sliding sleeve 9.2 is in a closed state, upwards discharging the liquid mixture along the inner cavity of the bleeder main body 9.1, continuously upwards along the small-diameter oil pipe 3, enabling the liquid mixture to enter the pump barrel 4.3 through the liquid inlet valve 4.8 of the pressure-controlled switch jet pump 4, and then enabling the sliding sleeve 4.7 to be in a closed state until the liquid mixture is discharged to the inner cavity of the floating pump core 4.1, and the liquid mixture is completely discharged to the ground;
fifth, the injection of high-pressure gas is stopped at this time, and because the liquid in the inner cavity of the oil pipe 2 is completely emptied, under the pressure action of the gas producing stratum 8, the gas producing jack-up check valve 7 is opened to produce to the ground along the oil pipe 2, and the gas production of the deep well is restored.
The above description is only a few preferred embodiments of the present invention, and any person skilled in the art may make modifications to the above described embodiments or make modifications to the same. Accordingly, the corresponding simple modifications or equivalent changes according to the technical scheme of the present invention fall within the scope of the claimed invention.

Claims (2)

1.一种深井采气管柱内射流排水装置的使用方法，深井采气管柱内射流排水装置包括套管（1）、油管（2）和反循环排水泵（5），其特征是：在油管（2）内通过小径油管（3）连接下入压控开关射流抽吸泵（4）和反循环排水泵（5），压控开关射流抽吸泵（4）位于油气井的中上部，反循环排水泵（5）位于油气井的下部，在反循环排水泵（5）的下方安装封隔器（6），底部安装单流阀（7）；所述压控开关射流抽吸泵（4）包括浮动式泵芯（4.1）、泵筒（4.3）、第一弹簧（4.6）、滑套（4.7），在泵筒（4.3）内安装浮动式泵芯（4.1），泵筒（4.3）的外部设有第一弹簧（4.6）和滑套（4.7），通过滑套（4.7）实现对混合液出口（4.9）的开关控制；通过向小径油管（3）注入高压气体，将压控开关射流抽吸泵（4）上部管柱内的水排出，排空后滑套（4.7）移动将混合液出口（4.9）关闭；再通过向油管（2）和小径油管（3）之间的环空注入高压气体，将反循环排水泵（5）上部的管柱内的水排出；1. A method for using a jet drainage device in a deep well gas production pipe column, the jet drainage device in a deep well gas production pipe column comprising a casing (1), an oil pipe (2) and a reverse circulation drainage pump (5), wherein a pressure-controlled switch jet suction pump (4) and a reverse circulation drainage pump (5) are connected and lowered into the oil pipe (2) via a small-diameter oil pipe (3); the pressure-controlled switch jet suction pump (4) is located in the middle and upper part of the oil and gas well, the reverse circulation drainage pump (5) is located in the lower part of the oil and gas well, a packer (6) is installed below the reverse circulation drainage pump (5), and a check valve (7) is installed at the bottom; the pressure-controlled switch jet suction pump (4) comprises a floating pump core (4.1), a pump barrel (4.3) , a first spring (4.6), and a sliding sleeve (4.7), a floating pump core (4.1) is installed in a pump barrel (4.3), a first spring (4.6) and a sliding sleeve (4.7) are provided outside the pump barrel (4.3), and the switch control of the mixed liquid outlet (4.9) is realized by the sliding sleeve (4.7); by injecting high-pressure gas into the small-diameter oil pipe (3), the water in the upper pipe column of the pressure-controlled switch jet suction pump (4) is discharged, and after the water is discharged, the sliding sleeve (4.7) moves to close the mixed liquid outlet (4.9); and then by injecting high-pressure gas into the annulus between the oil pipe (2) and the small-diameter oil pipe (3), the water in the upper pipe column of the reverse circulation drainage pump (5) is discharged; 所述的压控开关射流抽吸泵（4）还包括第一喷嘴（4.4）、第一喉管（4.5）、进液阀（4.8），所述泵筒（4.3）的内壁上部设有支撑台阶（4.3.1），与浮动式泵芯（4.1）的上部凸起配合连接，在浮动式泵芯（4.1）的顶部安装有第一打捞头（4.10），浮动式泵芯（4.1）的上侧安装第一进口（4.14），浮动式泵芯（4.1）的下部设有第一喷嘴（4.4），第一喷嘴（4.4）的下方设有第一喉管（4.5），第一喉管（4.5）的下部连通扩散腔（4.13），扩散腔（4.13）的下部设有混合液出口（4.9），在泵筒（4.3）的下端安装进液阀（4.8）；The pressure-controlled switch jet suction pump (4) further comprises a first nozzle (4.4), a first throat (4.5), and a liquid inlet valve (4.8); a support step (4.3.1) is provided on the upper inner wall of the pump barrel (4.3) and is connected with the upper protrusion of the floating pump core (4.1); a first fishing head (4.10) is installed on the top of the floating pump core (4.1); a first inlet (4.14) is installed on the upper side of the floating pump core (4.1); a first nozzle (4.4) is provided on the lower part of the floating pump core (4.1); a first throat (4.5) is provided below the first nozzle (4.4); the lower part of the first throat (4.5) is connected to the diffusion chamber (4.13); the lower part of the diffusion chamber (4.13) is provided with a mixed liquid outlet (4.9); and the liquid inlet valve (4.8) is installed at the lower end of the pump barrel (4.3); 所述的反循环排水泵（5）包括泵体（5.1）、第二喉管（5.2）、第二喷嘴（5.3）、第二动力液入口（5.4），所述泵体（5.1）的下侧设有第二动力液入口（5.4），第二动力液入口（5.4）连通到泵体（5.1）内腔的第二喷嘴（5.3），第二喷嘴（5.3）的上方设有第二喉管（5.2），泵体（5.1）的顶部设有排液口（5.6），泵体（5.1）的底部为进液口（5.7），进液口（5.7）的外侧安装有第二皮碗（5.5）；The reverse circulation drainage pump (5) comprises a pump body (5.1), a second throat pipe (5.2), a second nozzle (5.3), and a second power fluid inlet (5.4); the second power fluid inlet (5.4) is provided on the lower side of the pump body (5.1); the second power fluid inlet (5.4) is connected to the second nozzle (5.3) in the inner cavity of the pump body (5.1); a second throat pipe (5.2) is provided above the second nozzle (5.3); a liquid discharge port (5.6) is provided on the top of the pump body (5.1); the bottom of the pump body (5.1) is a liquid inlet (5.7); and a second leather cup (5.5) is installed on the outer side of the liquid inlet (5.7); 所述的压控开关射流抽吸泵（4）与反循环排水泵（5）之间的小径油管（3）上安装单向压控泄流器（9）；A one-way pressure-controlled bleeder (9) is installed on the small-diameter oil pipe (3) between the pressure-controlled switch jet suction pump (4) and the reverse circulation drainage pump (5); 所述的单向压控泄流器（9）包括泄流器主体（9.1）、内滑套（9.2）、泄流孔（9.3）、第二弹簧（9.4）、上接头（9.6）、下接头（9.7），所述泄流器主体（9.1）的上端设有上接头（9.6），下端设有下接头（9.7），所述泄流器主体（9.1）的中上部设有泄流孔（9.3），在泄流器主体（9.1）的内腔设有内滑套（9.2）和第二弹簧（9.4），所述内滑套（9.2）的下端连接第二弹簧（9.4），所述内滑套（9.2）的下部设有凸台结构；The one-way pressure-controlled bleeder (9) comprises a bleeder body (9.1), an inner sleeve (9.2), a leakage hole (9.3), a second spring (9.4), an upper joint (9.6), and a lower joint (9.7); the upper end of the bleeder body (9.1) is provided with an upper joint (9.6), the lower end is provided with a lower joint (9.7), the middle and upper part of the bleeder body (9.1) is provided with a leakage hole (9.3), the inner sleeve (9.2) and the second spring (9.4) are provided in the inner cavity of the bleeder body (9.1), the lower end of the inner sleeve (9.2) is connected to the second spring (9.4), and the lower part of the inner sleeve (9.2) is provided with a boss structure; 其中，深井采气管柱内射流排水装置的使用方法，包括以下过程：The method for using the jet drainage device in the deep well gas production string includes the following process: 第一，在油管（2）内通过小径油管（3）连接下入压控开关射流抽吸泵（4）和反循环排水泵（5），压控开关射流抽吸泵（4）位于油气井的中上部，反循环排水泵（5）位于油气井的下部，并坐封封隔器（6）；First, a pressure-controlled switch jet suction pump (4) and a reverse circulation drainage pump (5) are connected and lowered into the oil pipe (2) through a small-diameter oil pipe (3), the pressure-controlled switch jet suction pump (4) is located in the middle and upper part of the oil and gas well, the reverse circulation drainage pump (5) is located in the lower part of the oil and gas well, and a packer (6) is set; 第二，调整井口及地面注气流程，向小径油管（3）内注入高压气体，高压气体沿着第一进口（4.14）进入压控开关射流抽吸泵（4）的浮动式泵芯（4.1），再沿着第一喷嘴（4.4）喷出，带动从进液阀（4.8）进入的液体在第一喉管（4.5）气液混合，并沿着扩散腔（4.13）向下经过混合液出口（4.9）排出到浮动式泵芯（4.1）与泵筒（4.3）之间的环空，滑套（4.7）开启，再通过泵筒（4.3）外壁的混合液出口（4.9）排出到小径油管（3）与油管（2）之间的环空，气液混合物向上举升到地面，直至排空小径油管（3）与油管（2）之间的环空，从而实现压控开关射流抽吸泵（4）上部的液体排空；排空后滑套（4.7）在第一弹簧（4.6）的作用下移动将混合液出口（4.9）关闭；Second, the gas injection process at the wellhead and on the ground is adjusted to inject high-pressure gas into the small-diameter oil pipe (3). The high-pressure gas enters the floating pump core (4.1) of the pressure-controlled switch jet suction pump (4) along the first inlet (4.14), and then is ejected along the first nozzle (4.4), driving the liquid entering from the liquid inlet valve (4.8) to mix with the gas and liquid in the first throat (4.5), and then flows downward along the diffusion chamber (4.13) through the mixed liquid outlet (4.9) and is discharged to the floating pump core (4.1) and the pump barrel (4.4). .3), the sleeve (4.7) is opened, and then the mixed liquid outlet (4.9) on the outer wall of the pump barrel (4.3) is discharged into the annular space between the small-diameter oil pipe (3) and the oil pipe (2), and the gas-liquid mixture is lifted upward to the ground until the annular space between the small-diameter oil pipe (3) and the oil pipe (2) is emptied, thereby realizing the emptying of the liquid on the upper part of the pressure-controlled switch jet suction pump (4); after the emptying, the sleeve (4.7) moves under the action of the first spring (4.6) to close the mixed liquid outlet (4.9); 第三，通过地面注气流程向油管（2）与小径油管（3）之间的环空注入高压气体，高压气体继续推动位于压控开关射流抽吸泵（4）下方的油管（2）与小径油管（3）之间的环空的液体向下移动，并通过单向压控泄流器（9）的泄流孔（9.3）进入，并推动内滑套（9.2）开启，高压气体推动单向压控泄流器（9）上方的小径油管（3）内腔的液体向上排出，并经过压控开关射流抽吸泵（4）的进液阀（4.8）进入到泵筒（4.3）内，此时，滑套（4.7）处于关闭状态，液体混合物沿着泵筒（4.3）和浮动式泵芯（4.1）向上排出，直至排出到地面，完成单向压控泄流器（9）上方的油管（2）和小径油管（3）内腔的液体的替出；Third, high-pressure gas is injected into the annulus between the oil pipe (2) and the small-diameter oil pipe (3) through the surface gas injection process. The high-pressure gas continues to push the liquid in the annulus between the oil pipe (2) and the small-diameter oil pipe (3) below the pressure-controlled switch jet suction pump (4) to move downward, and enters through the leakage hole (9.3) of the one-way pressure-controlled bleeder (9), and pushes the inner sleeve (9.2) to open. The high-pressure gas pushes the liquid in the inner cavity of the small-diameter oil pipe (3) above the one-way pressure-controlled bleeder (9) to be discharged upward, and enters the pump barrel (4.3) through the liquid inlet valve (4.8) of the pressure-controlled switch jet suction pump (4). At this time, the sleeve (4.7) is in a closed state, and the liquid mixture is discharged upward along the pump barrel (4.3) and the floating pump core (4.1) until it is discharged to the ground, completing the replacement of the liquid in the inner cavity of the oil pipe (2) and the small-diameter oil pipe (3) above the one-way pressure-controlled bleeder (9); 第四，再通过地面注气流程向油管（2）与小径油管（3）之间的环空注入高压气体，高压气体继续推动位于压控开关射流抽吸泵（4）下方的油管（2）与小径油管（3）之间的环空的液体向下移动，并通过深井处的反循环排水泵（5）的第二动力液入口（5.4）进入到第二喷嘴（5.3）喷出，带动进液口（5.7）处的地层液体混合，并沿着第二喉管（5.2）向上通过排液口（5.6）排出，混合液体沿着小径油管（3）向上，经过单向压控泄流器（9）的下接头（9.7）向上，此时内滑套（9.2）处于关闭状态，液体混合物沿着泄流器主体（9.1）的内腔向上排出，再继续沿着小径油管（3）向上，经过压控开关射流抽吸泵（4）的进液阀（4.8）进入到泵筒（4.3）内，此时，滑套（4.7）处于关闭状态，液体混合物沿着泵筒（4.3）和浮动式泵芯（4.1）向上排出，直至排出到地面，完成油管（2）内腔的液体的全部替出；Fourth, high-pressure gas is injected into the annulus between the oil pipe (2) and the small-diameter oil pipe (3) through the surface gas injection process. The high-pressure gas continues to push the liquid in the annulus between the oil pipe (2) and the small-diameter oil pipe (3) located below the pressure-controlled switch jet suction pump (4) to move downward, and enters the second nozzle (5.3) through the second power fluid inlet (5.4) of the reverse circulation drainage pump (5) at the deep well to be sprayed out, driving the formation liquid at the liquid inlet (5.7) to mix, and then discharge upward along the second throat (5.2) through the discharge port (5.6). The mixed liquid flows along the small-diameter oil pipe (3) Upward, through the lower joint (9.7) of the one-way pressure-controlled bleeder (9), at which time the inner sleeve (9.2) is in a closed state, and the liquid mixture is discharged upward along the inner cavity of the bleeder body (9.1), and then continues to flow upward along the small-diameter oil pipe (3), passes through the liquid inlet valve (4.8) of the pressure-controlled switch jet suction pump (4) and enters the pump barrel (4.3). At this time, the sleeve (4.7) is in a closed state, and the liquid mixture is discharged upward along the pump barrel (4.3) and the floating pump core (4.1) until it is discharged to the ground, completing the complete replacement of the liquid in the inner cavity of the oil pipe (2); 第五，此时停止注入高压气体，由于油管（2）内腔的液体的全部排空，在产气地层（8）的压力作用下，产气顶开单流阀（7）沿油管（2）产出到地面，恢复深井的采气生产。Fifth, the injection of high-pressure gas is stopped at this time. Since the liquid in the inner cavity of the oil pipe (2) is completely drained, the gas is pushed open by the pressure of the gas-producing formation (8) to open the check valve (7) and flow out along the oil pipe (2) to the ground, thereby resuming gas production in the deep well. 2.根据权利要求1所述的深井采气管柱内射流排水装置的使用方法，其特征是：所述的泄流器主体（9.1）的内壁的上部内径小于下部的内径，在泄流器主体（9.1）的内壁的下部设有调节环（9.5），调节环（9.5）的上部与第二弹簧（9.4）的下端连接。2. The method for using the jet drainage device in the deep well gas production pipe column according to claim 1 is characterized in that: the inner diameter of the upper part of the inner wall of the leaker body (9.1) is smaller than the inner diameter of the lower part, and an adjustment ring (9.5) is provided at the lower part of the inner wall of the leaker body (9.1), and the upper part of the adjustment ring (9.5) is connected to the lower end of the second spring (9.4).
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