CN117307097A - Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method - Google Patents
Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method Download PDFInfo
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- CN117307097A CN117307097A CN202311613494.6A CN202311613494A CN117307097A CN 117307097 A CN117307097 A CN 117307097A CN 202311613494 A CN202311613494 A CN 202311613494A CN 117307097 A CN117307097 A CN 117307097A
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- scraper
- joint
- tube
- continuous capillary
- capillary steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 15
- 210000002445 nipple Anatomy 0.000 claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004146 energy storage Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 238000011001 backwashing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
Abstract
The invention relates to the technical field of oil-water well descaling, in particular to an offshore platform continuous capillary steel pipe oil pipe passing descaling device and a use method thereof. The technical proposal is as follows: one end of the continuous capillary steel pipe is wound on the roller along the fixed pulley and the active winding and unwinding device, the other end of the continuous capillary steel pipe is led into the inner cavity of the oil pipe along the wellhead and is connected to the upper end of the rotary joint, the rotary joint is provided with a rotary nipple, the rotary nipple is movably connected with the conversion joint through the rotary nipple, the lower end of the rotary nipple is connected with a hard scraper pipe scraper, and a scraper is arranged in the hard scraper pipe scraper. The beneficial effects are that: the invention transmits pressure through continuous capillary steel pipes, the tool string consists of the rotary joint and the hard scraper pipe scraper, the scraper can adapt to the scale matters in different conditions, the operation risk is strong, the scale removal operation can be completed by one-time running of the tool, the construction efficiency is improved, the period of the whole operation is short, the cost is low, the scale matters in the oil pipe can be directly scraped, the normal production of an oil-water well can be quickly recovered, and the invention is especially suitable for the operation construction of offshore platform oil-gas-water wells.
Description
Technical Field
The invention relates to the technical field of oil-water well descaling, in particular to an offshore platform continuous capillary steel pipe oil pipe passing descaling device and a use method thereof.
Background
In the maintenance and overhaul operation construction of the oil-water well, the oil pipe passing construction is a construction process for performing construction operation in the oil pipe of the oil-gas well by adopting a fixed pipe column. Coiled tubing is generally used for construction, and coiled tubing construction is generally carried out in a casing, and is 1.5-2.875 inches of coiled tubing is used. Particularly, after the scale substances appear in the oil pipe, the scale is generally removed by adopting a chemical agent scale removal or a steel winch belt scale scraper, the chemical agent method lacks pertinence to the scale on the oil pipe wall, only acts on the surface of the scale, the removal effect is poor, the pipe column has certain corrosiveness, the strength of the oil pipe is reduced, the perforation risk is increased, and the scale is more easily attached due to the increase of the erosion surface area of the pipe wall; in addition, the steel wire winch is adopted for construction, but the steel wire operation has certain limitation, firstly, the underground oil pipe needs to be provided with a positioning nipple in advance and can not be operated at other positions in the oil pipe by matching with the positioning and operation of a tool string; secondly, the steel wire operation is usually to lift and lower the steel wire to generate axial force so as to enable the tool string to act, thus being inconvenient for accurate positioning and control; thirdly, the field operation has higher technical difficulty and higher staff labor intensity.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a device for descaling oil pipe passing through continuous capillary steel pipes of an offshore platform and a use method thereof.
The invention relates to an offshore platform continuous capillary steel pipe oil pipe passing descaling device, which has the technical scheme that: including hydraulic winch and cylinder, install the cylinder on the hydraulic winch, still include continuous capillary steel pipe, fixed pulley, initiative receive and release ware, rotary joint, stereoplasm scraper pipe scraper, the one end of continuous capillary steel pipe is along fixed pulley, initiative receive and release ware winding on the cylinder, and the other end of continuous capillary steel pipe is gone into the oil pipe inner chamber down along the well head to be connected to rotary joint's upper end, be equipped with rotatory nipple joint on the rotary joint, through rotatory nipple joint and adapter swing joint, just the upper end of stereoplasm scraper pipe scraper is connected to the lower extreme of adapter, be equipped with the scraper in the stereoplasm scraper pipe scraper, make the scraper radially protruding through continuous capillary steel pipe pressurization, and then strike off the dirty thing that the oil pipe inner wall is attached.
Preferably, the rotary joint comprises an upper connector, a protective shell, a baffle, an upper joint, a rotary nipple and a conversion joint, wherein the baffle is arranged at the upper end of the upper joint, the protective shell is arranged outside the baffle, the upper connector is arranged at the upper end of the protective shell, the lower end of the protective shell is arranged on the upper joint through a fastening screw, the lower end of the upper joint is connected with the rotary nipple, and the lower end of the rotary nipple is movably connected with the conversion joint.
Preferably, a rotary seal is installed between the inner cavity of the adapter and the inner cavity of the upper connector, a ferrule tube joint is installed at the upper end of the inner cavity of the upper connector, and an anti-drop pressure plate is installed at the upper end of the upper connector.
Preferably, the hard scraper tube scraper comprises a pressing cap, a clamping sleeve upper cover, a clamping sleeve nut, a clamping sleeve joint, a screw, a scraper upper joint, a scraper rotary joint, a scraper outer shell, a fixing screw, a pressing plate, a rectangular spring, a pushing piston, a scraper, a balancing weight and an energy storage component.
Preferably, the energy storage assembly comprises a compensation piston, an energy storage device shell and a limiting spring base, wherein the energy storage device shell is arranged at the lower end of the scraper shell, the compensation piston is arranged in a cavity below a high-pressure liquid through hole of the scraper shell, the lower end of the compensation piston is connected with the energy storage piston, the energy storage piston and the limiting spring base are located in an inner cavity of the energy storage device shell, a limiting compression spring is arranged on the limiting spring base, and more than one balance hole is formed in the outer wall of the lower side of the energy storage device shell.
Preferably, an adjusting nut is installed at the lower end of the limiting spring base, and communicating holes are respectively formed in the adjusting nut and the inner cavity of the limiting spring base.
Preferably, the outer wall of the scraper adopts a spiral structure.
Preferably, the lower end of the hard scraper tube scraper is connected with a weighting rod.
Preferably, the weighting rod comprises an upper end, a weighting rod nipple, a lower end and a fastening screw, wherein the lower end of the upper end is connected with more than one weighting rod nipple, and the lower end of the weighting rod nipple is connected with the lower end through the fastening screw.
The invention relates to a use method of an offshore platform continuous capillary steel pipe oil pipe descaling device, which comprises the following steps:
1. preparing a tool: the method comprises the steps that a continuous capillary steel pipe made of stainless steel is used as a conveying medium of an underground tool string, the tool string consists of a rotary joint and a hard scraper, a fixed end of the continuous capillary steel pipe is connected with a roller on a hydraulic winch, an active retraction device is arranged, a lower well end of the continuous capillary steel pipe sequentially penetrates through a fixed pulley, a sealing element and a high-pressure tee joint of a well head to enter an oil pipe cavity in the well head, and then is connected with the rotary joint, and the lower part of the rotary joint is connected with the hard scraper;
2. and (3) preparation of construction: the well mouth operation is closed, the well mouth operation is carried out, the connected tool string is put into a top channel of the high-pressure tee joint, a sealing piece at the lower well end of the continuous capillary steel pipe is connected with the top of the high-pressure tee joint, so that the continuous capillary steel pipe can smoothly realize lifting and lowering actions, a flank of the high-pressure tee joint is connected with an overflow pipeline, the pressure in the well is prevented from being too high, and well liquid is sprayed out from the sealing piece;
3. the construction process comprises the following steps: slowly opening a main gate of a wellhead, controlling a tool string to be lowered through a hydraulic winch, enabling the tool string to only axially rotate relative to a rotary joint when rotating in the well and not to drive a continuous capillary steel pipe to rotate, slowing down the lowering speed when the tool string reaches a distance above a construction position, and repeatedly lowering and lifting the tool string when a display record is met; and the high-pressure liquid is pumped into the continuous capillary steel pipe on the ground, enters the inner cavity of the rotary joint along the continuous capillary steel pipe and then enters the high-pressure liquid through hole of the hard scraper tube, and pushes the scraper to move outwards by pushing the piston and extends out of the hard scraper tube, so that the scale attached to the inner wall of the oil pipe is scraped; the compensation piston and the energy storage piston can drive the limiting compression spring to deform and store energy under the action of high-pressure liquid, the energy storage shell plays a role in elastically increasing the internal volume, when hard scale is encountered, the scale can compress the scraper to move inwards, so that the pressure in the energy storage shell is increased, after repeated lowering and lifting operations, the scale is reduced or scraped, the energy storage shell compresses the internal pressure under the action of the limiting compression spring, and the scraper is pushed outwards to keep contact with the inner wall of an oil pipe; in addition, the scale scraped by the scraper is washed out from the oil pipe to the sewage tank through a water injection flow of the backwashing well, and the construction is completed.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, pressure is transmitted through a continuous capillary steel pipe with the diameter of 1/4 inch or 3/8 inch, the tool string consists of a rotary joint and a hard scraper pipe scraper, and the construction of a fixed pipe column can be carried out in an oil pipe without moving the pipe column; in addition, the continuous capillary steel pipe is connected with the rotary joint, so that the influence of torsional stress on the positioning depth can be greatly reduced, and the positioning data is more reliable; the hard scraper tube scraper is pressurized through the continuous capillary steel tube, and the pressure is transmitted to the hard scraper tube scraper through the inside of the rotary joint so as to ensure that the hard scraper tube scraper cannot leak; moreover, the scraper of the hard scraper tube scraper can adapt to the scale matters in different conditions, the operation risk is strong, the tool can be put down once to finish the scale removal operation, the construction efficiency is improved, the period of the whole operation is short, the cost is low, the scale matters in the oil tube can be directly scraped, the normal production of an oil-water well is quickly recovered, and the scraper tube scraper is particularly suitable for the operation construction of an offshore platform oil-gas-water well.
Drawings
FIG. 1 is a schematic view of the construction of the present invention;
FIG. 2 is a schematic structural view of a rotary joint;
FIG. 3 is a schematic view of a hard scraper tube scraper;
FIG. 4 is a schematic top view of a hard scraper tube scraper with the scraper extended;
FIG. 5 is a schematic view of the external shape of a hard scraper tube scraper;
FIG. 6 is a schematic view of the construction of a weighted rod;
in the upper graph: the device comprises a continuous capillary steel pipe 1, a hydraulic winch 2, a wellhead 3, a high-pressure tee joint 4, a fixed pulley 5, an active retraction device 6, a roller 7, a sleeve 8, an oil pipe 9, a rotary joint 10, a hard scraper pipe scraper 11, a weighting rod 12, a scale 13 and a sealing element 14;
the anti-drop pressure plate 1.1, the upper connector 1.2, the protective shell 1.3, the baffle plate 1.4, the upper connector 1.5, the rotary nipple 1.6, the rotary seal 1.7, the adapter 1.8, the upper retainer ring 1.9, the lower retainer ring 1.10, the sealing ring 1.11, the ferrule tube connector 1.12 and the fastening screw 1.13;
the pressure cap 11.1, the cutting sleeve upper cover 11.2, the cutting sleeve nut 11.3, the cutting sleeve joint 11.4, the screw 11.5, the upper joint 11.6 of the scraper, the rotary joint 11.7 of the scraper, the outer shell 11.8 of the scraper, the fixing screw 11.9, the pressing plate 11.10, the rectangular spring 11.11, the pushing piston 11.12, the scraper 11.13, the compensating piston 11.14, the energy storage piston 11.15, the energy storage shell 11.16, the limit spring base 11.17, the adjusting nut 11.18, the balancing weight 11.19, the high-pressure liquid through hole 11.20, the balance hole 11.21 and the limit compression spring 11.22;
an upper end head 12.1, a weighting rod pup joint 12.2, a lower end head 12.3 and a fastening screw 12.4.
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.
Embodiment 1, refer to fig. 1-5, the invention relates to a device for removing scale from oil pipe passing through continuous capillary steel pipe on offshore platform, which comprises a hydraulic winch 2 and a roller 7, wherein the roller 7 is arranged on the hydraulic winch 2, the device further comprises a continuous capillary steel pipe 1, a fixed pulley 5, an active retraction device 6, a rotary joint 10 and a hard scraper tube scraper 11, one end of the continuous capillary steel pipe 1 is wound on the roller 7 along the fixed pulley 5 and the active retraction device 6, the other end of the continuous capillary steel pipe 1 is lowered into an inner cavity of an oil pipe 9 along a wellhead 3, the rotary joint 10 is provided with a rotary nipple 1.6, the rotary nipple 1.6 is movably connected with an adapter 1.8, the lower end of the adapter 1.8 is connected with the upper end of a hard scraper tube scraper 11, a scraper 11.13 is arranged in the hard scraper tube 11, the scraper 11.13 is radially protruded through the pressurization of the continuous capillary steel tube 1, and then the scale 13 attached to the inner wall of the oil tube 9 is scraped.
Referring to fig. 2, the rotary joint 10 of the present invention includes an upper joint 1.2, a protective housing 1.3, a blocking piece 1.4, an upper joint 1.5, a rotary nipple 1.6, and an adapter 1.8, wherein the blocking piece 1.4 is installed at the upper end of the upper joint 1.5, the protective housing 1.3 is installed outside the blocking piece 1.4, the upper joint 1.2 is installed at the upper end of the protective housing 1.3, the lower end of the protective housing 1.3 is installed on the upper joint 1.5 through a fastening screw 1.13, the lower end of the upper joint 1.5 is connected with the rotary nipple 1.6, and the lower end of the rotary nipple 1.6 is movably connected with the adapter 1.8.
The rotary seal 1.7 is arranged between the inner cavity of the adapter 1.8 and the inner cavity of the upper connector 1.5, the clamping sleeve pipe joint 1.12 is arranged at the upper end of the inner cavity of the upper connector 1.5, the anti-drop pressure plate 1.1 is arranged at the upper end of the upper connector 1.2, the upper check ring 1.9 is arranged on the outer wall of the lower side of the rotary seal 1.7, and the lower check ring 1.10 and the sealing ring 1.11 are arranged on the outer wall of the lower side of the adapter 1.8.
Referring to fig. 3-5, the hard scraper tube scraper 11 comprises a pressing cap 11.1, a clamping sleeve upper cover 11.2, a clamping sleeve nut 11.3, a clamping sleeve joint 11.4, a screw 11.5, a scraper upper joint 11.6, a scraper rotary joint 11.7, a scraper outer shell 11.8, a fixing screw 11.9, a pressing plate 11.10, a rectangular spring 11.11, a pushing piston 11.12, a scraper 11.13, a balancing weight 11.19 and an energy storage component, wherein the upper end of the scraper upper joint 11.6 is provided with the clamping sleeve upper cover 11.2 through the screw 11.5, the pressing cap 11.1 is arranged at the upper end of the clamping sleeve upper cover 11.2, and a continuous capillary steel tube 1 is inserted into the inner cavity of the clamping sleeve upper cover 11.2 and is communicated with the inner cavity of the scraper upper joint 11.6, the upper end of the inner cavity of the scraper upper joint 11.6 is provided with a clamping sleeve joint 11.4, the upper end of the clamping sleeve joint 11.4 is provided with a clamping sleeve nut 11.3, the lower end of the scraper upper joint 11.6 is movably connected with the scraper outer shell 11.8 through the scraper rotary joint 11.7, the outer wall of the scraper outer shell 11.8 is provided with a scraper 11.13 through a fixing screw 11.9, a plurality of groups of pressing plates 11.10 and a rectangular spring 11.11, the inner side of the scraper 11.13 is matched with a pushing piston 11.12, the inner cavity of the scraper outer shell 11.8 is provided with a high-pressure liquid through hole 11.20, the inner ends of a plurality of pushing pistons 11.12 are communicated with the high-pressure liquid through hole 11.20, the lower end of the scraper outer shell 11.8 is connected with an energy storage assembly, and the lower end of the energy storage assembly is provided with a balancing weight 11.19.
The energy accumulator assembly comprises a compensation piston 11.14, an energy storage piston 11.15, an energy accumulator shell 11.16 and a limit spring base 11.17, wherein the energy accumulator shell 11.16 is installed at the lower end of the scraper shell 11.8, the compensation piston 11.14 is installed in a cavity below a high-pressure liquid through hole 11.20 of the scraper shell 11.8, the lower end of the compensation piston 11.14 is connected with the energy storage piston 11.15, the energy storage piston 11.15 and the limit spring base 11.17 are located in an inner cavity of the energy accumulator shell 11.16, a limit compression spring 11.22 is installed on the limit spring base 11.17, and more than one balance hole 11.21 is formed in the outer wall of the lower side of the energy accumulator shell 11.16 to balance internal and external pressure.
In addition, the lower end of the limit spring base 11.17 is provided with the adjusting nut 11.18, and the inner cavities of the adjusting nut 11.18 and the limit spring base 11.17 are respectively provided with a communication hole, so that the effect of balancing pressure is achieved.
The outer wall of the scraper 11.13 adopts a spiral structure, so that the condition of blocking during scraping the dirt 13 is avoided.
The invention relates to a use method of an offshore platform continuous capillary steel pipe oil pipe descaling device, which comprises the following steps:
1. preparing a tool: the method comprises the steps that a continuous capillary steel pipe 1 made of stainless steel is used as a conveying medium of a downhole tool string, the tool string consists of a rotary joint 10 and a hard scraper tube 11, the fixed end of the continuous capillary steel pipe 1 is connected with a roller 7 on a hydraulic winch 2, an active retraction device 6 is arranged, the lower well end of the continuous capillary steel pipe 1 sequentially passes through a fixed pulley 5, a sealing element 14 and a high-pressure tee 4 of a well head to enter an inner cavity of an oil pipe 9 in the well head 3, and then is connected with the rotary joint 10, the lower part of the rotary joint 10 is connected with the hard scraper tube 11, and the oil pipe 9 is positioned in a sleeve 8;
2. and (3) preparation of construction: the well mouth 3 is closed by operation, a connected tool string is put into a top channel of the high-pressure tee joint 4, a sealing piece 14 at the lower well end of the continuous capillary steel pipe 1 is connected with the top of the high-pressure tee joint 4, so that the continuous capillary steel pipe 1 can smoothly realize lifting and lowering actions, the side wings of the high-pressure tee joint 4 are connected with overflow pipelines, the pressure in the well is prevented from being too high, and well liquid is sprayed out from the sealing piece 14;
3. the construction process comprises the following steps: slowly opening a main gate of a wellhead 3, controlling a tool string to be lowered through a hydraulic winch 2, enabling the tool string to only axially rotate relative to a rotary joint 10 when rotating in a well and not to drive a continuous capillary steel pipe 1 to rotate, slowing down the lowering speed when the tool string reaches a certain distance above a construction position, and repeatedly lowering and lifting the tool string when a display record is met; the high-pressure liquid is injected into the continuous capillary steel pipe 1 from the ground, enters the inner cavity of the rotary joint 10 along the continuous capillary steel pipe 1 and then enters the high-pressure liquid through hole 11.20 of the hard scraper 11, and the scraper 11.13 is pushed to move outwards by pushing the piston 11.12 and extends out of the hard scraper 11, so that the scale 13 attached to the inner wall of the oil pipe 9 is scraped; the compensation piston 11.14 and the energy storage piston 11.15 drive the limit compression spring 11.22 to deform and store energy under the action of high-pressure liquid, the energy storage shell 11.16 plays a role in elastically increasing the internal volume, when encountering hard scale 13, the scale 13 compresses the scraper 11.13 to move inwards, so that the pressure in the energy storage shell 11.16 is increased, after repeated lowering and lifting operations, the scale 13 is reduced or scraped off, and the energy storage shell 11.16 compresses the internal pressure under the action of the limit compression spring 11.22, and pushes the scraper 11.13 outwards to keep contact with the inner wall of the oil pipe 9; in addition, the scale 13 scraped by the scraper 11.13 is washed out from the oil pipe 9 to the sewage tank through a water injection flow of the backwashing well, and the construction is completed.
The embodiment 2 of the invention relates to an offshore platform continuous capillary steel pipe oil pipe descaling device, which comprises a hydraulic winch 2 and a roller 7, wherein the roller 7 is arranged on the hydraulic winch 2, the offshore platform continuous capillary steel pipe descaling device further comprises a continuous capillary steel pipe 1, a fixed pulley 5, an active retraction device 6, a rotary joint 10 and a hard scraper pipe scraper 11, one end of the continuous capillary steel pipe 1 is wound on the roller 7 along the fixed pulley 5 and the active retraction device 6, the other end of the continuous capillary steel pipe 1 is lowered into an inner cavity of an oil pipe 9 along a wellhead 3, the rotary joint 10 is provided with a rotary nipple 1.6, the rotary nipple 1.6 is movably connected with an adapter 1.8, the lower end of the adapter 1.8 is connected with the upper end of a hard scraper tube scraper 11, a scraper 11.13 is arranged in the hard scraper tube 11, the scraper 11.13 is radially protruded through the pressurization of the continuous capillary steel tube 1, and then the scale 13 attached to the inner wall of the oil tube 9 is scraped.
The difference from example 1 is that:
the lower end of the hard scraper tube scraper 11 is connected with a weighting rod 12, which is suitable for different oil well conditions.
Referring to fig. 6, the weighting rod 12 of the present invention includes an upper end 12.1, a weighting rod nipple 12.2, a lower end 12.3, and a fastening screw 12.4, wherein the lower end of the upper end 12.1 is connected with more than one weighting rod nipple 12.2, and the lower end of the weighting rod nipple 12.2 is connected with the lower end 12.3 through the fastening screw 12.4.
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 (9)
1. The utility model provides an oil pipe scale removal device is crossed to continuous capillary steel pipe of offshore platform, includes hydraulic winch (2) and cylinder (7), installs cylinder (7), characterized by on hydraulic winch (2): the device comprises a rotary joint (10), a fixed pulley (5), a fixed pulley (6), a rotary joint (10) and a hard scraper (11), wherein one end of the rotary joint (1) is wound on a roller (7) along the fixed pulley (5) and the fixed pulley (6), the other end of the rotary joint (10) is connected with the inner cavity of an oil pipe (9) along a wellhead (3), the rotary joint (10) is provided with a rotary nipple (1.6), the rotary nipple (1.6) is movably connected with the rotary joint (1.8), the lower end of the rotary joint (1.8) is connected with the upper end of the hard scraper (11), a scraper (11.13) is arranged in the hard scraper (11), and the rotary joint (1) is pressurized to enable the scraper (11.13) to radially bulge so as to scrape dirt (13) attached to the inner wall of the oil pipe (9);
the hard scraper tube scraper (11) comprises a pressing cap (11.1), a clamping sleeve upper cover (11.2), a clamping sleeve nut (11.3), a clamping sleeve joint (11.4), a screw (11.5), a scraper tube upper joint (11.6), a scraper tube rotating joint (11.7), a scraper tube outer shell (11.8), a fixing screw (11.9), a pressing plate (11.10), a rectangular spring (11.11), a pushing piston (11.12), a scraper (11.13), a balancing weight (11.19) and an energy storage component, wherein the upper end of the scraper tube upper joint (11.6) is provided with the clamping sleeve upper cover (11.2) through the screw (11.5), the upper end of the clamping sleeve upper cover (11.2) is provided with the pressing cap (11.1), a continuous capillary steel tube (1) is inserted into an inner cavity of the clamping sleeve upper cover (11.2) and communicated with an inner cavity of the scraper tube upper joint (11.6), the inner cavity upper end of the scraper tube upper joint (11.6) is provided with the connector (11.4), the upper end of the scraper tube upper joint (11.4) is provided with the scraper tube upper shell (11.6), the upper end of the scraper tube upper joint (11.6) is provided with the scraper tube outer shell (11.8) through the screw (11.7) and the scraper tube upper shell (11.6) is fixedly matched with the upper end of the clamping sleeve (11.11.8) through the clamping sleeve upper sleeve (11.7) and the clamping sleeve upper sleeve (11.8), the inner cavity of the scraper outer shell (11.8) is provided with a high-pressure liquid through hole (11.20), the inner ends of the pushing pistons (11.12) are communicated with the high-pressure liquid through hole (11.20), the lower end of the scraper outer shell (11.8) is connected with an energy storage assembly, and the lower end of the energy storage assembly is provided with a balancing weight (11.19).
2. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 1, characterized in that: the rotary joint (10) comprises an upper joint (1.2), a protective casing (1.3), a baffle (1.4), an upper joint (1.5), a rotary nipple (1.6) and an adapter (1.8), wherein the baffle (1.4) is arranged at the upper end of the upper joint (1.5), the protective casing (1.3) is arranged outside the baffle (1.4), the upper joint (1.2) is arranged at the upper end of the protective casing (1.3), the lower end of the protective casing (1.3) is arranged on the upper joint (1.5) through a fastening screw (1.13), the lower end of the upper joint (1.5) is connected with the rotary nipple (1.6), and the lower end of the rotary nipple (1.6) is movably connected with the adapter (1.8).
3. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 2, characterized in that: the rotary seal (1.7) is arranged between the inner cavity of the adapter connector (1.8) and the inner cavity of the upper connector (1.5), the clamping sleeve pipe joint (1.12) is arranged at the upper end of the inner cavity of the upper connector (1.5), and the anti-drop pressure plate (1.1) is arranged at the upper end of the upper connector (1.2).
4. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 3, wherein: the energy accumulator assembly comprises a compensation piston (11.14), an energy storage piston (11.15), an energy accumulator shell (11.16) and a limiting spring base (11.17), wherein the energy accumulator shell (11.16) is installed at the lower end of a scraper outer shell (11.8), the compensation piston (11.14) is installed in a cavity below a high-pressure liquid through hole (11.20) of the scraper outer shell (11.8), the lower end of the compensation piston (11.14) is connected with the energy storage piston (11.15), the energy storage piston (11.15) and the limiting spring base (11.17) are located in an inner cavity of the energy accumulator shell (11.16), the limiting compression spring (11.22) is installed on the limiting spring base (11.17), and more than one balance hole (11.21) is formed in the outer wall of the lower side of the energy accumulator shell (11.16).
5. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 4, wherein: the lower end of the limit spring base (11.17) is provided with an adjusting nut (11.18), and the inner cavities of the adjusting nut (11.18) and the limit spring base (11.17) are respectively provided with a communication hole.
6. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 5, wherein: the outer wall of the scraper (11.13) adopts a spiral structure.
7. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 6, wherein: the lower end of the hard scraper tube scraper (11) is connected with a weighting rod (12).
8. The offshore platform continuous capillary steel tube oil tube descaling device according to claim 7, wherein: the weighting rod (12) comprises an upper end head (12.1), a weighting rod pup joint (12.2), a lower end head (12.3) and fastening screws (12.4), wherein the lower end of the upper end head (12.1) is connected with more than one weighting rod pup joint (12.2), and the lower end of the weighting rod pup joint (12.2) is connected with the lower end head (12.3) through the fastening screws (12.4).
9. The use method of the offshore platform continuous capillary steel pipe oil pipe passing descaling device as claimed in claim 8, which is characterized by comprising the following steps:
1. preparing a tool: the continuous capillary steel pipe (1) made of stainless steel is used as a conveying medium of an underground tool string, the tool string consists of a rotary joint (10) and a hard scraper (11), the fixed end of the continuous capillary steel pipe (1) is connected with a roller (7) on a hydraulic winch (2), an active retraction device (6) is arranged, the lower well end of the continuous capillary steel pipe (1) sequentially passes through a fixed pulley (5) of a well head, a sealing element (14) and a high-pressure tee joint (4) at first, enters an inner cavity of an oil pipe (9) in the well head (3) and is then connected with the rotary joint (10), and the lower part of the rotary joint (10) is connected with the hard scraper (11);
2. and (3) preparation of construction: the well mouth (3) is closed by operation, a connected tool string is put into a top channel of the high-pressure tee joint (4), a sealing piece (14) at the lower well end of the continuous capillary steel pipe (1) is connected with the top of the high-pressure tee joint (4), so that the continuous capillary steel pipe (1) can smoothly realize lifting and lowering actions, the side wings of the high-pressure tee joint (4) are connected with overflow pipelines, the pressure in the well is prevented from being too high, and well liquid is sprayed out from the sealing piece (14);
3. the construction process comprises the following steps: slowly opening a main gate of a wellhead (3), controlling a tool string to be lowered through a hydraulic winch (2), enabling the tool string to only axially rotate relative to a rotary joint (10) when rotating in a well and not to drive a continuous capillary steel pipe (1) to rotate, slowing down the lowering speed when the tool string reaches a distance above a construction position, and repeatedly lowering and lifting the tool string when a display record is met; the high-pressure liquid is pumped into the continuous capillary steel pipe (1) along the continuous capillary steel pipe (1), enters the inner cavity of the rotary joint (10), then enters the high-pressure liquid through hole (11.20) of the hard scraper (11), pushes the scraper (11.13) to move outwards by pushing the piston (11.12), and extends out of the hard scraper (11), so that the scale (13) attached to the inner wall of the oil pipe (9) is scraped; the compensation piston (11.14) and the energy storage piston (11.15) can drive the limit compression spring (11.22) to deform and store energy under the action of high-pressure liquid, the energy storage shell (11.16) plays a role in elastically increasing the internal volume, when hard scale (13) is encountered, the scale (13) can compress the scraper (11.13) to move inwards, so that the pressure in the energy storage shell (11.16) is increased, after repeated lowering and lifting operations, the scale (13) is reduced or scraped off, the energy storage shell (11.16) compresses the internal pressure under the action of the limit compression spring (11.22), and the scraper (11.13) is pushed outwards to keep contact with the inner wall of the oil pipe (9); in addition, the dirty objects (13) scraped by the scraper (11.13) are washed out from the oil pipe (9) to the dirty liquid tank through a water injection flow of the backwashing well, and the construction is completed.
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| CN202311613494.6A CN117307097B (en) | 2023-11-29 | 2023-11-29 | Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method |
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| CN117307097B (en) | 2024-03-05 |
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