CN109403929B - Hydraulic pumping type downhole choke and use method thereof - Google Patents
Hydraulic pumping type downhole choke and use method thereof Download PDFInfo
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- CN109403929B CN109403929B CN201811235441.4A CN201811235441A CN109403929B CN 109403929 B CN109403929 B CN 109403929B CN 201811235441 A CN201811235441 A CN 201811235441A CN 109403929 B CN109403929 B CN 109403929B
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- rubber cylinder
- central tube
- seat
- slip
- short
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- 238000005086 pumping Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 36
- 230000002265 prevention Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 8
- 229910010293 ceramic material Inorganic materials 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000002131 composite material Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003345 natural gas Substances 0.000 abstract description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
Landscapes
- 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)
- Excavating Of Shafts Or Tunnels (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of throttling and depressurization in natural gas production, and particularly relates to a hydraulic pumping type downhole throttler. According to the invention, through the symmetrical arrangement of the sand prevention cover, the throttle mouth and the seat ring, the slips, the rubber cylinder seat and the short rubber cylinder on the two sides of the long rubber cylinder and the connection arrangement of the throwing tools on the top end of the throttle, the underground throttle can be installed and used in a vertical well section shaft, and can also be used in a horizontal section, so that the application range of underground throttle is enlarged, and good use effect is obtained; the device has the advantages that the device is organically integrated with the cable, the cable head, the magnetic positioning instrument, the weighting rod, the ignition head and the setting tool through the throwing tool, so that the throwing position can be accurately controlled in the process of throwing the downhole choke, the phenomenon that the downhole choke is set midway due to improper throwing is avoided, and the reliability is high. The hydraulic pumping type downhole choke is made of composite materials, and can be quickly drilled and ground to be relieved in the later stage of service.
Description
Technical Field
The invention belongs to the technical field of throttling and depressurization in natural gas production, and particularly relates to a hydraulic pumping type downhole throttler and a use method thereof.
Background
The underground throttling process technology is a process technology which enables the throttling and depressurization process of natural gas to occur in a well shaft of a gas well through an underground restrictor, and is drainage and gas production technology with the advantages of good drainage and gas production effect, simplicity in operation, low cost and the like, so that the underground throttling process technology is widely applied to gas well production.
At present, the slip type downhole choke is widely applied to a gas field, is delivered to a preset position of a shaft through well testing steel wire operation, is fixed on an oil pipe through slips on the choke, and seals the inner wall of the oil pipe and the annular space of the choke by means of a rubber sleeve. The underground throttler is limited by a throwing process, an underground throttler structure and materials, the existing underground throttler is only limited to be installed in a vertical shaft section, the scope of the application is limited, along with the lengthening of a horizontal section, the drainage and gas production effect of the underground throttler installed in the vertical shaft section is exponentially reduced, and particularly, when the water yield in the middle and later stages of development is large, the effect is hardly achieved. In addition, in the process of putting the well testing steel wire into the downhole choke, the steel wire speed is controlled improperly, so that the downhole choke is easy to sit in the middle of the downhole choke.
Disclosure of Invention
The invention provides a hydraulic pumping type downhole choke and a using method thereof, and one of the purposes is that the hydraulic pumping type downhole choke is easy to put in and is reliable in setting; the second purpose is that it is a kind of underground throttle that can be used in the horizontal section too; thirdly, the downhole choke is provided with a choke nozzle with larger inner diameter which can be replaced at will according to the requirement; the fourth purpose is that it is a downhole choke which no longer needs the choke to serve and can be removed at any time.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the hydraulic pumping type downhole choke comprises a central pipe, wherein the outer wall of the central pipe is sequentially sleeved with a second seat ring, a second slip, a second rubber cylinder seat, a second short rubber cylinder, a long rubber cylinder, a first short rubber cylinder, a first rubber cylinder seat, a first slip and a first seat ring from top to bottom, adjacent parts sleeved outside the central pipe are contacted, the upper end of the second seat ring is connected with a second nut, the lower end of the first seat ring is connected with a first nut, and the second nut and the first nut are respectively connected with the central pipe through threads; the sand control cover has been cup jointed on the center tube bottom lateral wall, the bottom internal diameter of center tube is less than the internal diameter of center tube rest portion, the choke and center tube bottom inside wall contact be connected, the choke bottom flushes with center tube bottom terminal surface, is provided with the screw thread on the center tube top lateral wall.
The sand control cover be cask form and the hemispherical closure in bottom, the internal diameter of sand control cover upper end and the external diameter phase-match of center tube, the upper end of sand control cover cup joints on the lateral wall of center tube, is provided with the strip through-hole side by side on the sand control cover lateral wall.
The throttle mouth include big throttle mouth and little throttle mouth, big throttle mouth and little throttle mouth connect gradually from top to bottom on the inside wall of center tube bottom, the lower terminal surface of little throttle mouth flushes with the terminal surface of center tube bottom.
The long rubber cylinder consists of a round table section at two hollow ends and a cylindrical section connected with the round table sections, the hollow diameters of the round table sections at the two ends are matched with the outer diameter of the central tube, the inner cavity of the cylindrical section is in a spindle shape, and a supporting column is arranged in the middle of the spindle shape.
The first short rubber cylinder and the second short rubber cylinder are composed of a hollow cylindrical section and a round platform section, the hollow inner diameter is matched with the outer diameter of the central pipe, a first concave groove matched with the round platform section of the long rubber cylinder is formed in the bottom end face of the cylindrical section, and the long rubber cylinder is connected with the first short rubber cylinder and the second short rubber cylinder through the first concave groove respectively.
The first rubber cylinder seat and the second rubber cylinder seat are composed of hollow round table sections and cylindrical sections, a second annular concave groove is formed in the outer side wall of the middle of each cylindrical section, a third concave groove matched with the round table sections of the first short rubber cylinder and the second short rubber cylinder is formed in the bottom surface of each cylindrical section, and the first short rubber cylinder and the second short rubber cylinder are connected with the first short rubber cylinder and the second short rubber cylinder through the third concave grooves respectively.
The first short rubber cylinder, the long rubber cylinder and the second short rubber cylinder are made of rubber materials; the first slip and the second slip are made of ceramic materials; the rest parts are made of carbon fiber composite materials.
The central tube is provided with an annular thin wall at a position 6-10mm away from the top end, the thickness of the thin wall is 1-10mm, the length of the thin wall is 1-10mm, and the wall of the central tube is 3-20mm.
The sand control cover is barrel-shaped, the bottom end of the sand control cover is hemispherical and sealed, the inner diameter of the upper end of the sand control cover is matched with the outer diameter of the central tube, the upper end of the sand control cover is sleeved on the outer side wall of the central tube, and strip-shaped through holes are arranged on the side wall of the sand control cover side by side; the throttle nozzle comprises a large throttle nozzle and a small throttle nozzle, the large throttle nozzle and the small throttle nozzle are sequentially connected onto the inner side wall of the bottom end of the central tube from top to bottom, and the lower end face of the small throttle nozzle is flush with the end face of the bottom end of the central tube; the long rubber cylinder consists of a round table section at two hollow ends and a cylindrical section connecting the round table sections, the hollow diameters of the round table sections at the two ends are matched with the outer diameter of the central pipe, the inner cavity of the cylindrical section is in a spindle shape, and a supporting column is arranged in the middle of the spindle shape; the first short rubber cylinder and the second short rubber cylinder consist of a hollow cylindrical section and a circular truncated cone section, the hollow inner diameter is matched with the outer diameter of the central tube, a first concave groove matched with the circular truncated cone section of the long rubber cylinder is formed in the bottom end face of the cylindrical section, and the long rubber cylinder is connected with the first short rubber cylinder and the second short rubber cylinder through the first concave groove respectively; the first rubber cylinder seat and the second rubber cylinder seat are both composed of a hollow circular table section and a cylindrical section, a circular second concave groove is formed in the outer side wall of the middle of the cylindrical section, a third concave groove matched with the circular table section of the first short rubber cylinder and the second short rubber cylinder is formed in the bottom surface of the cylindrical section, and the first short rubber cylinder and the second short rubber cylinder are connected with the first short rubber cylinder and the second short rubber cylinder through the third concave groove respectively; the first short rubber cylinder, the long rubber cylinder and the second short rubber cylinder are made of rubber materials; the first slip and the second slip are made of ceramic materials, and the rest parts are made of carbon fiber composite materials; the central tube is provided with an annular thin wall at a position 6-10mm away from the top end, the thickness of the thin wall is 1-10mm, the length of the thin wall is 1-10mm, and the wall of the central tube is 3-20mm.
The application method of the hydraulic pumping type downhole choke is characterized by comprising the following steps of: the well is flushed, so that the well bore is ensured to be clean; the upper end of a central tube of the hydraulic pumping type downhole choke is connected with a seat sealing tool through threads, so that the upper end of the central tube is connected with a throwing tool; the throwing tool is detachably connected with the top end of the central tube; the throwing tool is sequentially connected with a cable, a cable head, a magnetic positioning instrument, a weighting rod, an ignition head and a setting tool from top to bottom; one end of the setting tool is provided with threads matched with the threads on the side wall of the top end of the central tube, and the setting tool is detachably connected with the central tube through the threads; after the hydraulic pumping type downhole choke is lowered to a designed position through a positioning device on a throwing tool, namely a magnetic positioning instrument, an igniter ignites and seats, an outer cylinder of a seat sealing tool pushes down a first seat ring and a second seat ring, the first seat ring and the second seat ring move down to push a first slip and a second slip, the first slip and the second slip move down and prop up along a first rubber cylinder seat and a second rubber cylinder seat respectively, and simultaneously push the first rubber cylinder seat and the second rubber cylinder seat to compress a first short rubber cylinder, a long rubber cylinder and a second short rubber cylinder, so that the rubber cylinders expand to achieve the purpose of plugging an annular space of the sleeve, at the moment, the first slip and the second slip are clamped on the inner wall of the sleeve, a central tube is pulled, and a thin wall designed at the central tube is broken, so that seat sealing and a hand of the hydraulic pumping type downhole choke are completed; when the downhole choke is not needed to work, the drilling and grinding is quickly released through the continuous oil pipe drilling and grinding tool.
The invention has the beneficial effects that:
1. according to the invention, through the symmetrical arrangement of the sand prevention cover, the throttle mouth and the seat ring, the slips, the rubber cylinder seat and the short rubber cylinder on the two sides of the long rubber cylinder and the connection arrangement of the throwing tools on the top end of the throttle, the underground throttle can be installed and used in a vertical well section shaft, and can also be used in a horizontal section, so that the application range of underground throttle is enlarged, and good use effect is obtained;
2. according to the invention, the throwing tool is organically integrated with the cable, the cable head, the magnetic positioning instrument, the weighting rod, the ignition head and the setting tool, so that in the process of throwing the underground throttle, the throwing position can be accurately controlled, the phenomenon that the underground throttle is set halfway due to improper throwing in the middle of throwing is avoided, and the reliability is higher. The hydraulic pumping type downhole choke is made of light materials, can be dragged to a designated position of a horizontal section by using a cable, is ignited and sealed by using the cable, is reliable in sealing, is designed with a renewable choke, and can be started by entering a central rod by using a special tool and driving the large choke into a sand prevention cover by pressing the choke down the choke when the choke with larger inner diameter needs to be replaced; the hydraulic pumping type downhole choke is made of composite materials, and can be quickly drilled and ground to be relieved in the later stage of service.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a hydraulic pumping downhole choke of the present invention;
FIG. 2 is a schematic diagram of a hydraulic pumping downhole choke setting string configuration of the present invention.
FIG. 3 is a schematic diagram of a hydraulic pumping downhole choke adjustment tool according to the present invention.
In the figure: 1-a sand prevention cover; 2-small throttle nozzle; 3-large restrictor mouths; 4-a first nut; 5-a first seat ring; 6-a first slip; 7-a first rubber cylinder seat; 8-a first short rubber cylinder; 9-a long rubber cylinder; 10-a second short rubber cylinder; 11-a second rubber cylinder seat; 12-a second slip; 13-a second seat ring; 14-a second nut; 15-a central tube; 16-cable; 17-cable head; 18-magnetic locator; 19-a weighted rod; 20-igniting the head; 21-setting tool; 22-hydraulically pumped downhole choke; 23-a first concave groove; 24-a second concave groove; 25-a third concave groove; 26-supporting columns; 27-expansion joint; 28-grip; 29-limiting blocks; 30-ejector rods; 31-plug.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the hydraulic pumping type downhole choke shown in fig. 1 and 2 at least comprises a central pipe 15, wherein a second seat ring 13, a second slip 12, a second rubber cylinder seat 11, a second short rubber cylinder 10, a long rubber cylinder 9, a first short rubber cylinder 8, a first rubber cylinder seat 7, a first slip 6 and a first seat ring 5 are sleeved on the outer wall of the central pipe 15 from top to bottom in sequence, adjacent parts sleeved outside the central pipe 15 are contacted, the upper end of the second seat ring 13 is connected with a second screw cap 14, the lower end of the first seat ring 5 is connected with a first screw cap 4, and the second screw cap 14 and the first screw cap 4 are respectively connected with the central pipe 15 through threads; the sand control cover 1 has been cup jointed on the lateral wall of center tube 15 bottom, the bottom internal diameter of center tube 15 is less than the internal diameter of the rest of center tube 15, the choke and center tube 15 bottom inside wall contact be connected, the choke bottom flushes with center tube 15 bottom face, is provided with the screw thread on the center tube 15 top lateral wall.
When in actual use, the well is flushed, so that the well shaft is ensured to be clean; the upper end of the hydraulic pumping type downhole choke central tube 15 is connected with a seat sealing tool 21 through threads so as to be connected with a throwing tool; the delivery means is detachably connected to the top end of the central tube 15. The throwing tool is sequentially connected with a cable 16, a cable head 17, a magnetic positioning instrument 18, a weighting rod 19, an ignition head 20 and a setting tool 21 from top to bottom; one end of the setting tool 21 is provided with threads matching the threads of the top side wall of the center tube 15, and the setting tool 21 is detachably connected with the center tube 15 through the threads. When in actual use, the hydraulic oil pump is made of light materials, can be driven to a designated position of a horizontal section by using a cable to drag the hydraulic oil pump, and is reliably set by using cable ignition. After the hydraulic pumping type downhole choke 22 is placed to a designed position through a positioning device on a throwing tool, namely a magnetic positioning instrument 18, an igniter 20 is ignited for setting, an outer cylinder of a setting tool 21 pushes down a first seat ring 5 and a second seat ring 13, the first seat ring 5 and the second seat ring 13 move down to push a first slip 6 and a second slip 12, the first slip 6 and the second slip 12 move down along a first rubber cylinder seat 7 and a second rubber cylinder seat 11 respectively to be spread, and simultaneously push the first rubber cylinder seat 7 and the second rubber cylinder seat 11 to compress a first short rubber cylinder 8, a long rubber cylinder 9 and a second short rubber cylinder 10, so that the rubber cylinders are expanded to achieve the purpose of plugging an annular space of a sleeve, at the moment, the first slip 6 and the second slip 12 are clamped on the inner wall of the sleeve, and meanwhile, a central tube 15 is pulled, and the thin wall of the central tube 15 is designed to be broken, so that the setting and releasing of the hydraulic pumping type downhole choke is completed. When the downhole choke is not needed to work, the drilling and grinding is quickly released through the continuous oil pipe drilling and grinding tool. The second nut 14 and the first nut 4 mainly play a role in pre-tightening the second seat ring 13, the second slips 12, the second rubber cylinder seat 11, the second short rubber cylinder 10, the long rubber cylinder 9, the first short rubber cylinder 8, the first rubber cylinder seat 7, the first slips 6 and the first seat ring 5.
Embodiment two:
a hydraulically pumped downhole choke as shown in fig. 1 differs from example 1 in that: the sand control cover 1 be cask form and the hemispherical closure in bottom, the internal diameter of sand control cover 1 upper end and the external diameter phase-match of center tube 15, the upper end of sand control cover 1 cup joints on the lateral wall of center tube 15, is provided with the strip through-hole side by side on the sand control cover 1 lateral wall.
The sand prevention cover 1 can eliminate the interference of sediment and is in a good running state for a long time by arranging the sand prevention cover in actual use.
Embodiment III:
a hydraulically pumped downhole choke as shown in fig. 1 differs from example 1 in that: the throttle mouth include big throttle mouth 3 and little throttle mouth 2, big throttle mouth 3 and little throttle mouth 2 connect gradually from last to down on the inside wall of center tube 15 bottom, the lower terminal surface of little throttle mouth 2 flushes with the terminal surface of center tube 15 bottom.
In actual use, the large throttle valve 3 and the small throttle valve 2 are arranged, so that when the throttle valve with larger inner diameter needs to be replaced, the large inner diameter throttle valve is driven into the sand prevention cover by being driven down, and the small throttle valve can be started, thereby expanding the application range of the invention.
Embodiment four:
a hydraulically pumped downhole choke as shown in fig. 1 differs from example 1 in that: the long rubber cylinder 9 consists of a round table section at two hollow ends and a cylindrical section connecting the round table sections, the hollow diameters of the round table sections at the two ends are matched with the outer diameter of the central tube 15, the inner cavity of the cylindrical section is in a spindle shape, and a supporting column 26 is arranged in the middle of the spindle shape.
Preferably, the first short rubber cylinder 8 and the second short rubber cylinder 10 are composed of a hollow cylindrical section and a circular truncated cone section, the hollow inner diameter is matched with the outer diameter of the central tube 15, a first concave groove 23 matched with the circular truncated cone section of the long rubber cylinder 9 is formed in the bottom end face of the cylindrical section, and the long rubber cylinder 9 is connected with the first short rubber cylinder 8 and the second short rubber cylinder 10 through the first concave groove 23 respectively.
Preferably, the first rubber cylinder seat 7 and the second rubber cylinder seat 11 are both composed of a hollow circular table section and a cylindrical section, a circular second concave groove 24 is formed in the outer side wall of the middle of the cylindrical section, a third concave groove 25 matched with the circular table section of the first short rubber cylinder 8 and the second short rubber cylinder 10 is formed in the bottom surface of the cylindrical section, and the first short rubber cylinder 8 and the second short rubber cylinder 10 are respectively connected with the first short rubber cylinder 8 and the second short rubber cylinder 10 through the third concave groove 25.
Preferably, the first short rubber cylinder 8, the long rubber cylinder 9 and the second short rubber cylinder 10 are made of rubber materials; the first slip 6 and the second slip 12 are made of ceramic materials; the rest parts are made of carbon fiber composite materials.
During actual use, the long rubber cylinder 9, the first rubber cylinder seat 7 and the second rubber cylinder seat 11, and the first rubber cylinder seat 7 and the second rubber cylinder seat 11 are structurally arranged, so that the outer cylinder of the seat sealing tool 21 pushes down the first seat ring 5 and the second seat ring 13 to move downwards, and accordingly the first slip 6 and the second slip 12 are pushed to move downwards along the first rubber cylinder seat 7 and the second rubber cylinder seat 11 respectively and are unfolded smoothly. The first short rubber cylinder 8, the long rubber cylinder 9 and the second short rubber cylinder 10 are made of rubber materials; the first slip 6 and the second slip 12 are made of ceramic materials; the rest parts are made of carbon fiber composite materials, so that the weight of the hydraulic pump is reduced, and the hydraulic pump can be driven to the horizontal section to reach the designated position by using the cable.
Fifth embodiment:
a hydraulically pumped downhole choke as shown in fig. 1 differs from example 1 in that: the central tube 15 is provided with an annular thin wall at a position 6-10mm away from the top end, the thickness of the thin wall is 1-10mm, the length of the thin wall is 1-10mm, and the wall of the central tube 15 is 3-20mm.
In actual use, the thin wall of the central tube 15 is arranged, so that the function of the invention is well realized.
Example six:
a hydraulically pumped downhole choke as shown in fig. 1 differs from example 1 in that: the sand control cover 1 is barrel-shaped, the bottom end of the sand control cover 1 is hemispherical and sealed, the inner diameter of the upper end of the sand control cover 1 is matched with the outer diameter of the central tube 15, the upper end of the sand control cover 1 is sleeved on the outer side wall of the central tube 15, and strip-shaped through holes are arranged on the side wall of the sand control cover 1 side by side; the throttle nozzle comprises a large throttle nozzle 3 and a small throttle nozzle 2, the large throttle nozzle 3 and the small throttle nozzle 2 are sequentially connected onto the inner side wall of the bottom end of the central tube 15 from top to bottom, and the lower end face of the small throttle nozzle 2 is flush with the end face of the bottom end of the central tube 15; the long rubber cylinder 9 consists of a round table section at two hollow ends and a cylindrical section connecting the round table sections, the hollow diameters of the round table sections at the two ends are matched with the outer diameter of the central tube 15, the inner cavity of the cylindrical section is in a spindle shape, and a support column 26 is arranged in the middle of the spindle shape; the first short rubber cylinder 8 and the second short rubber cylinder 10 consist of a hollow cylindrical section and a circular truncated cone section, the hollow inner diameter is matched with the outer diameter of the central tube 15, a first concave groove 23 matched with the circular truncated cone section of the long rubber cylinder 9 is formed in the bottom end surface of the cylindrical section, and the long rubber cylinder 9 is connected with the first short rubber cylinder 8 and the second short rubber cylinder 10 through the first concave groove 23 respectively; the first rubber cylinder seat 7 and the second rubber cylinder seat 11 are both composed of a hollow circular table section and a cylindrical section, a circular second concave groove 24 is formed in the outer side wall of the middle part of the cylindrical section, a third concave groove 25 matched with the circular table section of the first short rubber cylinder 8 and the second short rubber cylinder 10 is formed in the bottom surface of the cylindrical section, and the first short rubber cylinder 8 and the second short rubber cylinder 10 are respectively connected with the first short rubber cylinder 8 and the second short rubber cylinder 10 through the third concave groove 25; the first short rubber cylinder 8, the long rubber cylinder 9 and the second short rubber cylinder 10 are made of rubber materials; the first slip 6 and the second slip 12 are made of ceramic materials, and the rest parts are made of carbon fiber composite materials; the central tube 15 is provided with an annular thin wall at a position 6-10mm away from the top end, the thickness of the thin wall is 1-10mm, the length of the thin wall is 1-10mm, and the wall of the central tube 15 is 3-20mm.
During actual use, the well is flushed, so that the well bore is ensured to be clean; the upper end of the hydraulic pumping type downhole choke central tube 15 is connected with a seat sealing tool 21 through threads so as to be connected with a throwing tool; the delivery means is detachably connected to the top end of the central tube 15. The throwing tool is sequentially connected with a cable 16, a cable head 17, a magnetic positioning instrument 18, a weighting rod 19, an ignition head 20 and a setting tool 21 from top to bottom; one end of the setting tool 21 is provided with threads matching the threads of the top side wall of the center tube 15, and the setting tool 21 is detachably connected with the center tube 15 through the threads. When in actual use, the hydraulic oil pump is made of light materials, can be driven to a designated position of a horizontal section by using a cable to drag the hydraulic oil pump, and is reliably set by using cable ignition. After the hydraulic pumping type downhole choke 22 is placed to a designed position through a positioning device on a throwing tool, namely a magnetic positioning instrument 18, an igniter 20 is ignited for setting, an outer cylinder of a setting tool 21 pushes down a first seat ring 5 and a second seat ring 13, the first seat ring 5 and the second seat ring 13 move down to push a first slip 6 and a second slip 12, the first slip 6 and the second slip 12 move down along a first rubber cylinder seat 7 and a second rubber cylinder seat 11 respectively to be spread, and simultaneously push the first rubber cylinder seat 7 and the second rubber cylinder seat 11 to compress a first short rubber cylinder 8, a long rubber cylinder 9 and a second short rubber cylinder 10, so that the rubber cylinders are expanded to achieve the purpose of plugging an annular space of a sleeve, at the moment, the first slip 6 and the second slip 12 are clamped on the inner wall of the sleeve, and meanwhile, a central tube 15 is pulled, and the thin wall of the central tube 15 is designed to be broken, so that the setting and releasing of the hydraulic pumping type downhole choke is completed. When the downhole choke is not needed to work, the drilling and grinding is quickly released through the continuous oil pipe drilling and grinding tool. The second nut 14 and the first nut 4 mainly play a role in pre-tightening the second seat ring 13, the second slips 12, the second rubber cylinder seat 11, the second short rubber cylinder 10, the long rubber cylinder 9, the first short rubber cylinder 8, the first rubber cylinder seat 7, the first slips 6 and the first seat ring 5. The large throttle mouth 3 and the small throttle mouth 2 are arranged, so that when the throttle mouth with larger inner diameter needs to be replaced, the large inner diameter throttle mouth is driven into the sand control cover by being pressed down, and the small throttle mouth can be started, thereby expanding the application range of the invention. The long rubber cylinder 9, the first rubber cylinder seat 7 and the second rubber cylinder seat 11, and the first rubber cylinder seat 7 and the second rubber cylinder seat 11 are structurally arranged, so that the outer cylinder of the seat sealing tool 21 pushes down the first seat ring 5 and the second seat ring 13 to move downwards, and accordingly the first slip 6 and the second slip 12 are pushed to move downwards along the first rubber cylinder seat 7 and the second rubber cylinder seat 11 respectively and are unfolded smoothly. The first short rubber cylinder 8, the long rubber cylinder 9 and the second short rubber cylinder 10 are made of rubber materials; the first slip 6 and the second slip 12 are made of ceramic materials; the rest parts are made of carbon fiber composite materials, so that the weight of the hydraulic pump is reduced, and the hydraulic pump can be driven to the horizontal section to reach the designated position by using the cable. The thin wall of the central tube 15 is arranged, so that the function of the invention is well realized.
In summary, by arranging the sand prevention cover, the throttle mouth and the seat ring, the slips, the rubber cylinder seat and the short rubber cylinder on the two sides of the long rubber cylinder and connecting the throwing tools on the top end of the throttle, the invention realizes that the underground throttle can be installed and used in a vertical well section shaft and also can be used in a horizontal section, expands the application range of underground throttle and obtains good use effect; the device has the advantages that the device is organically integrated with the cable, the cable head, the magnetic positioning instrument, the weighting rod, the ignition head and the setting tool through the throwing tool, so that the throwing position can be accurately controlled in the process of throwing the downhole choke, the phenomenon that the downhole choke is set midway due to improper throwing is avoided, and the reliability is high. The hydraulic pumping type downhole choke provided by the invention is made of light materials, can be dragged to a designated position of a horizontal section by using a cable, is ignited and sealed by using the cable, is reliable in sealing, is provided with a renewable choke, and can be started by using a matched special adjusting tool to lower the choke 3 in the mandrel 15 when the choke with a larger inner diameter needs to be replaced, and the choke 2 is put into a sand prevention cover; the special adjusting tool is an integrated mechanism which consists of an expansion joint 27, a grip 28, a limiting block 29, an ejector rod 30 and a plug 31 from top to bottom in sequence; the hydraulic pumping type downhole choke is made of composite materials, and can be quickly drilled and ground to be relieved in the later stage of service.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
The technical solutions between the embodiments may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art that when the combination of technical solutions contradicts or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
Claims (3)
1. The application method of the hydraulic pumping type downhole choke is characterized by comprising the following steps of: the well is flushed, so that the well bore is ensured to be clean; the upper end of a central tube of the hydraulic pumping type downhole choke is connected with a seat sealing tool through threads, so that the upper end of the central tube is connected with a throwing tool; the throwing tool is detachably connected with the top end of the central tube; the throwing tool is sequentially connected with a cable, a cable head, a magnetic positioning instrument, a weighting rod, an ignition head and a setting tool from top to bottom; one end of the setting tool is provided with threads matched with the threads on the side wall of the top end of the central tube, and the setting tool is detachably connected with the central tube through the threads; after the hydraulic pumping type downhole choke is lowered to a designed position through a positioning device on a throwing tool, namely a magnetic positioning instrument, an igniter ignites and seats, an outer cylinder of a seat sealing tool pushes down a first seat ring and a second seat ring, the first seat ring and the second seat ring move down to push a first slip and a second slip, the first slip and the second slip move down and prop up along a first rubber cylinder seat and a second rubber cylinder seat respectively, and simultaneously push the first rubber cylinder seat and the second rubber cylinder seat to compress a first short rubber cylinder, a long rubber cylinder and a second short rubber cylinder, so that the rubber cylinders expand to achieve the purpose of plugging an annular space of the sleeve, at the moment, the first slip and the second slip are clamped on the inner wall of the sleeve, a central tube is pulled, and a thin wall designed at the central tube is broken, so that seat sealing and a hand of the hydraulic pumping type downhole choke are completed; when the downhole choke is not required to work, rapidly removing drilling and grinding through the continuous oil pipe drilling and grinding tool;
the hydraulic pumping type downhole choke comprises a central pipe, wherein the outer wall of the central pipe is sequentially sleeved with a second seat ring, a second slip, a second rubber cylinder seat, a second short rubber cylinder, a long rubber cylinder, a first short rubber cylinder, a first rubber cylinder seat, a first slip and a first seat ring from top to bottom, adjacent parts sleeved outside the central pipe are contacted, the upper end of the second seat ring is connected with a second nut, the lower end of the first seat ring is connected with a first nut, and the second nut and the first nut are respectively connected with the central pipe through threads; the outer side wall of the bottom end of the central tube is sleeved with a sand prevention cover, the inner diameter of the bottom end of the central tube is smaller than the inner diameter of the rest part of the central tube, and the outer side wall of the top end of the central tube is provided with threads;
the sand control cover is barrel-shaped, the bottom end of the sand control cover is hemispherical and sealed, the inner diameter of the upper end of the sand control cover is matched with the outer diameter of the central tube, the upper end of the sand control cover is sleeved on the outer side wall of the central tube, and strip-shaped through holes are arranged on the side wall of the sand control cover side by side; the throttle nozzle comprises a large throttle nozzle and a small throttle nozzle, the large throttle nozzle and the small throttle nozzle are sequentially connected onto the inner side wall of the bottom end of the central tube from top to bottom, and the lower end face of the small throttle nozzle is flush with the end face of the bottom end of the central tube; the long rubber cylinder consists of a round table section at two hollow ends and a cylindrical section connecting the round table sections, the hollow diameters of the round table sections at the two ends are matched with the outer diameter of the central pipe, the inner cavity of the cylindrical section is in a spindle shape, and a supporting column is arranged in the middle of the spindle shape; the first short rubber cylinder and the second short rubber cylinder consist of a hollow cylindrical section and a circular truncated cone section, the hollow inner diameter is matched with the outer diameter of the central tube, a first concave groove matched with the circular truncated cone section of the long rubber cylinder is formed in the bottom end face of the cylindrical section, and the long rubber cylinder is connected with the first short rubber cylinder and the second short rubber cylinder through the first concave groove respectively; the first rubber cylinder seat and the second rubber cylinder seat are composed of hollow round table sections and cylindrical sections, a second annular concave groove is formed in the outer side wall of the middle of each cylindrical section, a third concave groove matched with the round table sections of the first short rubber cylinder and the second short rubber cylinder is formed in the bottom surface of each cylindrical section, and the first short rubber cylinder and the second short rubber cylinder are connected with the first short rubber cylinder and the second short rubber cylinder through the third concave grooves respectively.
2. The method of using a hydraulically pumped downhole choke as set forth in claim 1, wherein: the first short rubber cylinder, the long rubber cylinder and the second short rubber cylinder are made of rubber materials; the first slip and the second slip are made of ceramic materials.
3. The method of using a hydraulically pumped downhole choke as set forth in claim 1, wherein: the central tube is provided with an annular thin wall at a position 6-10mm away from the top end, the thickness of the thin wall is 1-10mm, the length of the thin wall is 1-10mm, and the wall of the central tube is 3-20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811235441.4A CN109403929B (en) | 2018-10-23 | 2018-10-23 | Hydraulic pumping type downhole choke and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811235441.4A CN109403929B (en) | 2018-10-23 | 2018-10-23 | Hydraulic pumping type downhole choke and use method thereof |
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| CN109403929A CN109403929A (en) | 2019-03-01 |
| CN109403929B true CN109403929B (en) | 2023-09-26 |
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| CN201811235441.4A Active CN109403929B (en) | 2018-10-23 | 2018-10-23 | Hydraulic pumping type downhole choke and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111691862A (en) * | 2020-07-08 | 2020-09-22 | 中国石油天然气股份有限公司 | Multifunctional underground throttle free of rope throwing and fishing |
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|---|---|---|---|---|
| US3314224A (en) * | 1963-02-06 | 1967-04-18 | Hamel Gmbh | Bobbin-building mechanism |
| US5370179A (en) * | 1993-07-13 | 1994-12-06 | Mills; Robert A. R. | Drive head for rotary down hole pump |
| CN201778787U (en) * | 2010-08-25 | 2011-03-30 | 中国石油天然气股份有限公司 | Single-screw centrifugal injection downhole choke |
| CN204002734U (en) * | 2014-05-23 | 2014-12-10 | 西安金立石油科技有限公司 | A kind of pneumatic setting restriction choke |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325610B2 (en) * | 2000-04-17 | 2008-02-05 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
| US7503397B2 (en) * | 2004-07-30 | 2009-03-17 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
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2018
- 2018-10-23 CN CN201811235441.4A patent/CN109403929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314224A (en) * | 1963-02-06 | 1967-04-18 | Hamel Gmbh | Bobbin-building mechanism |
| US5370179A (en) * | 1993-07-13 | 1994-12-06 | Mills; Robert A. R. | Drive head for rotary down hole pump |
| CN201778787U (en) * | 2010-08-25 | 2011-03-30 | 中国石油天然气股份有限公司 | Single-screw centrifugal injection downhole choke |
| CN204002734U (en) * | 2014-05-23 | 2014-12-10 | 西安金立石油科技有限公司 | A kind of pneumatic setting restriction choke |
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| CN109403929A (en) | 2019-03-01 |
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