CN112065327A - Hollow rod internal circulation paraffin removal device and method - Google Patents
Hollow rod internal circulation paraffin removal device and method Download PDFInfo
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- CN112065327A CN112065327A CN201910496048.9A CN201910496048A CN112065327A CN 112065327 A CN112065327 A CN 112065327A CN 201910496048 A CN201910496048 A CN 201910496048A CN 112065327 A CN112065327 A CN 112065327A
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- 239000012188 paraffin wax Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003129 oil well Substances 0.000 claims abstract description 30
- 238000005406 washing Methods 0.000 claims abstract description 29
- 238000001556 precipitation Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 2
- 210000002445 nipple Anatomy 0.000 claims 2
- 239000001993 wax Substances 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 28
- 238000005086 pumping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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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
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a hollow rod internal circulation paraffin removal device and method. The invention provides a hollow rod internal circulation paraffin removal device, which comprises a first short joint, a first joint, a second joint, a continuous pipe, a hollow polished rod, a hollow rod, a second short joint, a precipitation rod, a sucker rod and an oil well pump plunger; the first joint is connected with an outlet of the hot car washing, and the second joint is connected with the metering station. The invention also provides a hollow rod internal circulation paraffin removal method, which comprises the following steps: the hot water is heated and pressurized by the hot car washing, enters the first joint, enters the continuous pipe from the first joint, enters the annular space through the continuous pipe, flows through the hollow rod and the hollow polished rod through the annular space, enters the second joint, and flows out through the second joint to enter the metering station. The hollow rod internal circulation paraffin removal device and method provided by the invention realize paraffin removal to a depth above the wax precipitation point of an oil well and avoid pollution to stratum.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering. More particularly, the invention relates to a hollow rod internal circulation paraffin removal device and a method.
Background
In the production process of an oil well, paraffin in crude oil begins to separate out under certain conditions along with the reduction of temperature and pressure and the separation of solution gas in a shaft and is attached to an oil pipe and a sucker rod, so that an oil outlet channel is reduced, the oil flow resistance and the rod column load are increased, and the oil well can stop production in severe cases.
In order to remove paraffin precipitated in an oil well, an oil jacket backwashing mode is generally adopted, hot water is injected from a sleeve pipe, and enters a pump cylinder and an oil pipe through a sieve pipe to form reverse circulation. However, this method of paraffin removal has two problems: firstly, the circulation path of hot water in the well is long, the heat waste is serious, the heat efficiency is low, the wax precipitation point of a common oil well is more than 900 meters, the oil sleeve backwashing enters the oil pipe through a sieve pipe, the depth of the sieve pipe is generally 1500-2500 meters, the sieve pipe is far deeper than the wax precipitation point, the heat of well washing hot water is wasted inefficiently, the well washing time is long, the water quantity is large, and the effect is not ideal; and secondly, the hot water for washing the well is easy to pollute the stratum, so that the productivity of the oil well is reduced, the drainage period is long, the drainage period is about 3 days after the oil jacket of the general oil well is washed by heat, the longer drainage period can reach 7-10 days, and the yield of the oil well is seriously influenced.
Therefore, the invention provides a hollow rod internal circulation paraffin removal device and a method, which aim to solve the problems.
Disclosure of Invention
The invention aims to provide a hollow rod internal circulation paraffin removal device.
The invention also aims to provide a hollow rod internal circulation paraffin removal method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hollow rod internal circulation paraffin removal device comprises a first short joint, a first joint, a second joint, a continuous pipe, a hollow polished rod, a hollow rod, a second short joint, a precipitation rod, a sucker rod and an oil well pump plunger; wherein,
the bottom end of the first short circuit is connected with the first joint; the bottom end of the first joint is connected with the second joint; the bottom end of the second joint is connected with the hollow polished rod; the bottom end of the hollow polished rod is connected with the hollow rod; the bottom end of the hollow rod is connected with the second short circuit; the bottom end of the second short circuit is connected with the precipitation rod; the bottom end of the settling rod is connected with the sucker rod; the bottom end of the sucker rod is connected with the plunger of the oil pump;
the top end of the second joint is provided with a sealing element which separates an inner cavity of the first joint from an inner cavity of the second joint;
the continuous pipe is inserted into the inner cavity of the second connector, and the top end of the continuous pipe is fixedly connected with the second connector through a sealing element; annuluses are arranged between the outer wall of the continuous pipe and the inner wall of the second joint, between the inner wall of the hollow polished rod and between the outer wall of the continuous pipe and the inner wall of the hollow rod;
the inner cavity of the first joint is communicated with the annular space through the inner cavity of the continuous pipe;
the first joint is connected with an outlet of the hot car washing, and the second joint is connected with the metering station.
In the invention, the first short circuit is used for connecting the whole sucker rod string with a rope hanger to transmit the power of the oil pumping unit; the first joint is used for receiving hot water in the hot car washing and transmitting the hot water into a continuous pipe in the hollow rod; the second joint is used for discharging hot water after internal circulation of the hollow rod back to the station; the continuous pipe is used for constructing a circulating space in the hollow rod and is a passage for hot water to enter the hollow rod; the hollow polished rod and the hollow rod are used for circulating an outer pipe of a space, and an annular space formed by the hollow polished rod and the hollow rod and the continuous pipe is a channel for hot water to return out of the hollow rod; the second short circuit is used for limiting the running-in position of the coiled tubing; the precipitation rod is used for precipitating impurities in hot water, so that circulation blockage is avoided; the sucker rod is used for transmitting the power of the oil pumping unit to the oil well pump piston; the oil well pump plunger is used for pumping and lifting crude oil in the oil well.
Preferably, the side wall of the first joint comprises a first opening part, and the first opening part is connected with an outlet of the hot washing vehicle.
Preferably, the side wall of the second joint comprises a second opening part, and the second opening part is connected with the metering station.
Preferably, the coiled tubing extends up through the seal to the bottom end of the first sub and down to the top end of the second sub.
Preferably, the first short circuit is a rope hanger short circuit; the second short circuit is a continuous pipe limiting short circuit; the first joint is a water inlet joint; the second joint is a water return joint.
Preferably, the diameter of the first short circuit includes but is not limited to 25mm or 28 mm.
Preferably, the hollow polished rod has a specification including, but not limited to, a diameter of 42mm and an inner diameter of 31mm or a diameter of 36mm and an inner diameter of 25 mm.
Preferably, the hollow rod has a gauge including, but not limited to, a diameter of 42mm and an inner diameter of 31mm or a diameter of 36mm and an inner diameter of 25 mm.
Preferably, the dimensions of the continuous tube include, but are not limited to, a diameter of 24mm and an inner diameter of 17mm or a diameter of 21mm and an inner diameter of 15 mm.
Preferably, the depth of the second short circuit is 50-100m deeper than the depth of the wax deposition point of the oil well, and can be designed to be 800-1100m according to practical situations.
Preferably, the diameter of the sucker rod includes, but is not limited to, 16mm, 19mm, 22mm and 25 mm.
Preferably, the diameter of the oil well pump plunger includes but is not limited to 32mm, 38mm, 44mm, 57mm and 70 mm.
Preferably, the side wall of the bottom end of the continuous pipe comprises sieve holes; hot water enters the annulus through the screen holes.
Preferably, a heat-insulating layer is arranged outside the continuous pipe; the heat-insulating layer comprises a heat-insulating material layer formed on the outer surface of the continuous pipe and a wear-resistant material layer formed on the outer surface of the heat-insulating material layer. It should be understood by those skilled in the art that the connection portion of the continuous pipe and the sealing member and the mesh portion of the continuous pipe are not provided with the insulation layer.
Preferably, the material of the heat-insulating material layer comprises polyethylene, infrared ceramic powder and a foaming agent; the material of the wear-resistant material layer comprises polypropylene and nano silicon oxide.
Preferably, the first opening part is connected with an outlet of the hot washing vehicle through a water inlet pipeline; a first valve is arranged between the first opening part and the water inlet pipeline.
Preferably, the second opening part is connected with the metering station through a water return pipeline and a ground oil collecting pipeline; a second valve is arranged between the second opening part and the water return pipeline; and a third valve is arranged between the water return pipeline and the ground oil collecting pipeline.
Preferably, the bottom end of the first short joint is connected with the first joint through threads; the bottom end of the first joint is connected with the second joint through threads; the bottom end of the second joint is connected with the hollow polished rod through threads; the bottom end of the hollow polished rod is connected with the hollow rod through threads; the bottom end of the hollow rod is connected with the second short joint through threads; the bottom end of the second short joint is connected with the settling rod through threads; the bottom end of the settling rod is connected with the sucker rod through threads; the bottom end of the sucker rod is connected with the oil pump plunger through threads.
Preferably, the second short circuit comprises a hollow-out part.
The invention also provides a hollow rod internal circulation paraffin removal method, which uses the device and comprises the following steps:
the hot water is heated and pressurized by the hot car washing, enters the first joint, enters the continuous pipe from the first joint, enters the annular space through the continuous pipe, flows through the hollow rod and the hollow polished rod through the annular space, enters the second joint, and flows out through the second joint to enter the metering station.
Preferably, the hollow rod internal circulation paraffin removal method specifically comprises the following steps: the hot water enters a water inlet pipeline through the hot car washing by heating and pressurizing, the first valve is opened, enters the first joint through the first opening part, enters the continuous pipe from the first joint, enters the annular space through the continuous pipe, flows through the hollow rod and the hollow polished rod through the annular space, enters the second joint, flows out through the second opening part, opens the second valve, enters a water return pipeline, opens the third valve, and enters the metering station through a ground oil collecting pipeline.
Preferably, the paraffin removal step further comprises the steps of closing the first valve, the second valve and the third valve, removing the pipeline and recovering normal production.
Preferably, the amount of hot water is no more than 12 cubes.
Preferably, when the consumption of the hot water is less than or equal to 3, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 85-90 ℃. The displacement of the invention is the displacement of the hot car washing, namely the flow of hot water entering the hollow rod through the first joint.
Preferably, the amount of the hot water is>When the pressure is less than or equal to 3 and less than or equal to 12, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 95-100 ℃.
The invention has the following beneficial effects:
the hollow rod internal circulation paraffin removal device provided by the invention adopts a hollow rod internal circulation paraffin removal mode, hot water is not contacted with well fluid, the water content of an oil well is not influenced, the stratum is not polluted, and the yield is not influenced; in addition, the coiled tubing is used, so that under the condition that the using amount of well flushing hot water is far lower than that of an oil jacket reverse well flushing method, heat carried by the hot water is transferred to the depth of the coiled tubing limit short circuit, wax removal of all well sections above a wax precipitation point is realized, and the phenomenon that the heat is quickly consumed at the upper part of a shaft in the downward flowing process to cause that the wax removal incapable range cannot reach the depth of the wax precipitation point is avoided;
the hollow rod internal circulation paraffin removal method provided by the invention solves the problems of long well washing path, low heat efficiency, stratum pollution and long drainage period, and meets the requirements of deep paraffin removal above the paraffin precipitation point of an oil well.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 shows a schematic view of a hollow rod internal circulation paraffin removal unit provided by the present invention;
FIG. 2 shows a cross-sectional view of a coiled tubing provided by the present invention;
FIG. 3 shows a schematic view of a second joint provided by the present invention;
the device comprises a hot car washing device 1, a hot car washing device 2, a water inlet pipeline 3, a first valve 4, a first short circuit 5, a first joint 6, a second joint 7, a continuous pipe 8, a hollow polished rod 9, a hollow rod 10, a second short circuit 101, a hollow part 11, a precipitation rod 12, a sucker rod 13, an oil pump plunger 13, a second valve 14, a water return pipeline 15, a third valve 16, a ground oil collecting pipeline 17, a sealing part 18, a first opening part 19 and a second opening part 20.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In order to remove paraffin precipitated in an oil well, an oil jacket backwashing method is generally adopted in the prior art, however, the method has the defects of long well washing time, large water amount and undesirable effect; the hot water of the second well washing easily pollutes the stratum, so that the productivity of the oil well is reduced, the drainage period is long, and the yield of the oil well is seriously influenced. Therefore, the invention provides the hollow rod internal circulation paraffin removal device and method, which can be used for realizing paraffin removal of the depth above the paraffin precipitation point of an oil well and avoiding polluting the stratum.
Specifically, with reference to fig. 1, the invention provides a hollow rod internal circulation paraffin removal device, which comprises a first short joint 4, a first joint 5, a second joint 6, a coiled tubing 7, a hollow polished rod 8, a hollow rod 9, a second short joint 10, a settling rod 11, a sucker rod 12 and an oil well pump plunger 13; wherein,
the bottom end of the first short circuit 4 is connected with the first joint 5; the bottom end of the first joint 5 is connected with the second joint 6; the bottom end of the second joint 6 is connected with the hollow polished rod 8; the bottom end of the hollow polished rod 8 is connected with the hollow rod 9; the bottom end of the hollow rod 9 is connected with the second short circuit 10; the bottom end of the second short circuit 10 is connected with the settling rod 11; the bottom end of the settling rod 11 is connected with the sucker rod 12; the bottom end of the sucker rod 12 is connected with the oil well pump plunger 13;
the inner cavity of the second joint 6, the inner cavity of the hollow polished rod 8 and the inner cavity of the hollow rod 9 are communicated;
the top end of the second joint 6 is provided with a sealing element 18, and the sealing element 18 separates the inner cavity of the first joint 5 from the inner cavity of the second joint 6;
the continuous tube 7 is inserted from the inner cavity of the second connector 6, and the top end of the continuous tube 7 is fixedly connected with the second connector 6 through a sealing element 18;
annuluses are arranged between the outer wall of the continuous pipe 7 and the inner wall of the second joint 6, between the inner wall of the hollow polished rod 8 and between the inner walls of the hollow rods 9;
the inner cavity of the first joint 5 is communicated with the annular space through the inner cavity of the continuous pipe 7;
the first joint 5 is connected with an outlet of the hot car washing 1; the second joint 6 is connected to a metering station.
In the invention, the hollow polished rod, the hollow rod, the continuous tube and the precipitation rod are hollow tubes, and the sucker rod is a solid tube.
In the invention, the first short circuit is used for connecting the whole sucker rod string with a rope hanger to transmit the power of the oil pumping unit; the first joint is used for receiving hot water in the hot car washing and transmitting the hot water into a continuous pipe in the hollow rod; the second joint is used for discharging hot water after internal circulation of the hollow rod back to the station; the continuous pipe is used for constructing a circulating space in the hollow rod and is a passage for hot water to enter the hollow rod; the hollow polished rod and the hollow rod are used for circulating an outer pipe of a space, and an annular space formed by the hollow polished rod and the hollow rod and the continuous pipe is a channel for hot water to return out of the hollow rod; the second short circuit is used for limiting the running-in position of the coiled tubing; the precipitation rod is used for precipitating impurities in hot water, so that circulation blockage is avoided; the sucker rod is used for transmitting the power of the oil pumping unit to the oil well pump piston; the oil well pump plunger is used for pumping and lifting crude oil in the oil well. When the device is used for paraffin removal, the well-flushing liquid does not enter an oil pipe all the time, and only positive circulation is carried out in the hollow rod, so that a check valve is not needed in the rod column structure, and the device is simple and convenient to popularize and use.
In a preferred embodiment of the present invention, the side wall of the first joint 5 comprises a first opening 19, and the first opening 19 is connected with the outlet of the hot car wash 1; the side wall of the second joint 6 comprises a second opening part 20, and the second opening part 20 is connected with the metering station.
In a preferred embodiment of the invention, the continuous pipe 7 extends up through the seal 18 to the lumen of the first connector 5 and down to the top end of the second short circuit 10;
in a preferred embodiment of the invention, the first short circuit 4 is a rope hanger short circuit; the second short circuit 10 is a coiled tubing limit short circuit; the first joint 5 is a water inlet joint; the second joint 6 is a water return joint.
In a preferred embodiment of the present invention, the diameter of the first short joint 4 includes, but is not limited to, 25mm or 28mm, and the specification of the hollow polished rod 8 includes, but is not limited to, 42mm in diameter, 31mm in inner diameter or 36mm in diameter, 25mm in inner diameter; the hollow rod 9 has specifications including, but not limited to, a diameter of 42mm and an inner diameter of 31mm or a diameter of 36mm and an inner diameter of 25 mm; the dimensions of the continuous tube 7 include, but are not limited to, a diameter of 24mm and an inner diameter of 17mm or a diameter of 21mm and an inner diameter of 15 mm; the depth of the second short circuit 10 is 50-100m deeper than the depth of the wax precipitation point of the oil well, and can be designed to be 800-1100m according to actual conditions; the diameter of the sucker rod 12 includes but is not limited to 16mm, 19mm, 22mm and 25 mm; the diameter of the oil well pump plunger 13 includes but is not limited to 32mm, 38mm, 44mm, 57mm and 70 mm.
In a preferred embodiment of the present invention, the side wall of the bottom end of the continuous pipe 7 comprises a sieve hole; hot water enters the annular space through the sieve holes; the sieve mesh not only enables hot water to enter the hollow rod from the continuous pipe, but also can effectively increase the flow area at the side wall in a sieve mesh mode, reduce the local head loss with skill, and avoid the blockage of pore channels by impurities in the water.
In a preferred embodiment of the present invention, referring to fig. 2, the exterior of the continuous pipe 7 is provided with an insulating layer 71; the heat-insulating layer 71 comprises a heat-insulating material layer formed on the outer surface of the continuous pipe and a wear-resistant material layer formed on the outer surface of the heat-insulating material layer; the heat insulation material layer is used for improving the heat insulation effect of the continuous pipe, so that the using amount of hot water is further reduced on the premise of ensuring that heat carried by the hot water is transferred to the depth of the limit short joint of the continuous pipe; in addition, the consumption speed of the heat of the hot water at the upper part of the shaft is reduced in the downward flowing process, and the wax removal range is further ensured to reach the wax precipitation point depth; the wear-resistant material layer is used for improving the wear resistance of the heat-insulating layer; as will be understood by those skilled in the art, the connection part of the continuous pipe and the sealing element and the sieve pore part of the continuous pipe are not provided with the heat insulation layer; further, the material of the heat-insulating material layer comprises polyethylene, infrared ceramic powder and a foaming agent; the material of the wear-resistant material layer comprises polypropylene and nano silicon oxide. As can be understood by those skilled in the art, the material of the thermal insulation material layer and the material of the wear-resistant material layer are both conventional material formulations. According to the invention, the coiled tubing with heat insulation performance is arranged, so that the heat loss at the upper well section is reduced, the well washing liquid still has the paraffin removal effect after entering the oil pipe at the bottom of the coiled tubing, and the outer wall of the hollow rod is heated when the annular space between the hollow rod and the coiled tubing returns upwards, so that the paraffin removal effect depth is deepened.
In a preferred embodiment of the invention, the first opening 19 is connected to the outlet of the hot car wash 1 via a water inlet line 2; a first valve 3 is arranged between the first opening part 19 and the water inlet pipeline 2; the flow of hot water into the fitting is adjustable by means of a first valve.
In a preferred embodiment of the invention, the second opening 20 is connected to the metering station via a return line 15 and a ground oil collection line 17; a second valve 14 is arranged between the second opening part 20 and the water return pipeline 15; a third valve 16 is arranged between the water return pipeline 15 and the ground oil collecting pipeline 17; the flow of the hot water is adjusted through the second valve and the third valve.
In a preferred embodiment of the invention, the bottom end of the first short joint 4 is connected with the first joint 5 through threads; the bottom end of the first joint 5 is connected with the second joint 6 through threads; the bottom end of the second joint 6 is connected with the hollow polished rod 8 through threads; the bottom end of the hollow polished rod 8 is connected with the hollow rod 9 through threads; the bottom end of the hollow rod 9 is connected with the second short joint 10 through threads; the bottom end of the second short joint 10 is connected with the settling rod 11 through threads; the bottom end of the settling rod 11 is connected with the sucker rod 12 through threads; the bottom end of the sucker rod 12 is connected with the oil pump plunger 13 through threads.
In a preferred embodiment of the present invention, referring to fig. 3, the second short circuit 10 includes a hollow-out portion 101, so as to allow impurities in the hot water to enter the precipitation rod through the hollow-out portion, thereby effectively avoiding the possibility that the impurities in the hot water block the annulus.
As another aspect of the invention, the invention also provides a hollow rod internal circulation paraffin removal method, which uses the device and comprises the following steps:
the hot water is heated and pressurized by the hot car washing 1, enters the first joint 5, enters the continuous pipe 7 from the first joint 5, enters the annular space through the continuous pipe 7, flows through the hollow rod 9 and the hollow polished rod 8 through the annular space, enters the second joint 6, and flows out through the second joint 6 to enter the metering station.
In a preferred embodiment of the present invention, the hollow rod internal circulation paraffin removal method specifically comprises the following steps: hot water is heated and pressurized by the hot car washing 1 to enter the water inlet pipeline 2, the first valve 3 is opened, the hot water enters the first connector 5 through the first opening part 19, enters the continuous pipe 7 through the first connector 5, enters the annular space through the continuous pipe 7, flows through the hollow rod 9 and the hollow polished rod 8 through the annular space, enters the second connector 6, flows out through the second opening part 20, opens the second valve 14, enters the water return pipeline 15, opens the third valve 16, and enters the metering station through the ground oil collecting pipeline 17; and after the paraffin removal is finished, closing the first valve 3, the second valve 14 and the third valve 16, dismantling the pipeline, and recovering the normal production.
Further, the consumption of the hot water is not more than 12.
Further, when the consumption of the hot water is less than or equal to 3, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 85-90 ℃.
Further, the amount of the hot water is>When the pressure is less than or equal to 3 and less than or equal to 12, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 95-100 ℃.
The displacement of the invention is the displacement of the hot car washing, namely the flow of hot water entering the hollow rod through the first joint.
According to the hollow rod internal circulation paraffin removal device provided by the invention, hot water is not contacted with well fluid, so that the yield is not influenced; the hot water consumption is low, and the paraffin removal of all well sections above the paraffin precipitation point is realized; the problems of long well washing path, low thermal efficiency, stratum pollution and long drainage period are solved, and the requirements of deep paraffin removal and paraffin removal above the paraffin precipitation point of an oil well are met.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. The hollow rod internal circulation paraffin removal device is characterized by comprising a first short joint, a first joint, a second joint, a continuous pipe, a hollow polished rod, a hollow rod, a second short joint, a precipitation rod, a sucker rod and an oil well pump plunger; wherein,
the bottom end of the first short circuit is connected with the first joint; the bottom end of the first joint is connected with the second joint; the bottom end of the second joint is connected with the hollow polished rod; the bottom end of the hollow polished rod is connected with the hollow rod; the bottom end of the hollow rod is connected with the second short circuit; the bottom end of the second short circuit is connected with the precipitation rod; the bottom end of the settling rod is connected with the sucker rod; the bottom end of the sucker rod is connected with the plunger of the oil pump;
the top end of the second joint is provided with a sealing element which separates an inner cavity of the first joint from an inner cavity of the second joint;
the continuous pipe is inserted into the inner cavity of the second connector, and the top end of the continuous pipe is fixedly connected with the second connector through a sealing element; annuluses are arranged between the outer wall of the continuous pipe and the inner wall of the second joint, between the inner wall of the hollow polished rod and between the outer wall of the continuous pipe and the inner wall of the hollow rod;
the inner cavity of the first joint is communicated with the annular space through the inner cavity of the continuous pipe;
the first joint is connected with an outlet of the hot car washing, and the second joint is connected with the metering station.
2. The hollow rod internal circulation paraffin removal device of claim 1, wherein the coiled tubing extends up through the seal to the bottom end of the first nipple and down to the top end of the second nipple.
3. The hollow rod internal circulation paraffin removal device as claimed in claim 1, wherein the side wall of the bottom end of the continuous pipe comprises a sieve hole.
4. The hollow rod internal circulation paraffin removal device according to claim 3, wherein an insulating layer is arranged outside the continuous pipe; the heat-insulating layer comprises a heat-insulating material layer formed on the outer surface of the continuous pipe and a wear-resistant material layer formed on the outer surface of the heat-insulating material layer.
5. The hollow rod internal circulation paraffin removal device of claim 1, wherein the side wall of the first joint comprises a first opening part, and the first opening part is connected with an outlet of a hot car washing; the side wall of the second joint comprises a second opening part, and the second opening part is connected with the metering station.
6. The hollow bar internal circulation paraffin removal device as claimed in claim 5, wherein the first opening part is connected with the outlet of the hot car washing through a water inlet pipeline; a first valve is arranged between the first opening part and the water inlet pipeline; the second opening part is connected with the metering station through a water return pipeline and a ground oil collecting pipeline; a second valve is arranged between the second opening part and the water return pipeline; and a third valve is arranged between the water return pipeline and the ground oil collecting pipeline.
7. A hollow rod internal circulation paraffin removal method, which is characterized in that the method uses the hollow rod internal circulation paraffin removal device as claimed in any one of claims 1 to 5, and comprises the following steps:
the hot water is heated and pressurized by the hot car washing, enters the first joint, enters the continuous pipe from the first joint, enters the annular space through the continuous pipe, flows through the hollow rod and the hollow polished rod through the annular space, enters the second joint, and flows out through the second joint to enter the metering station.
8. The hollow rod internal circulation paraffin removal method according to claim 7, wherein the hollow rod internal circulation paraffin removal method specifically comprises the following steps: the hot water enters a water inlet pipeline through the hot car washing by heating and pressurizing, the first valve is opened, enters the first joint through the first opening part, enters the continuous pipe from the first joint, enters the annular space through the continuous pipe, flows through the hollow rod and the hollow polished rod through the annular space, enters the second joint, flows out through the second opening part, opens the second valve, enters a water return pipeline, opens the third valve, and enters the metering station through a ground oil collecting pipeline.
9. The hollow rod internal circulation paraffin removal method according to claim 7 or 8, wherein the amount of the hot water is not more than 12 square.
10. The hollow rod internal circulation paraffin removal method according to claim 8, wherein when the consumption of hot water is less than or equal to 3 square, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 85-90 ℃; the amount of the hot water is>When the pressure is less than or equal to 3 and less than or equal to 12, the pressure is 5.5-7 MPa, and the discharge capacity is 1.5-1.8m3H, the temperature is 95-100 ℃.
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| CN201910496048.9A CN112065327A (en) | 2019-06-10 | 2019-06-10 | Hollow rod internal circulation paraffin removal device and method |
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| CN201910496048.9A CN112065327A (en) | 2019-06-10 | 2019-06-10 | Hollow rod internal circulation paraffin removal device and method |
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| CN112065327A true CN112065327A (en) | 2020-12-11 |
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Cited By (1)
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| CN114000851A (en) * | 2021-12-30 | 2022-02-01 | 山东泉益环保科技有限公司 | Pollution-free high-temperature nitrogen cleaning operation device for pumping well |
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