CN112282701A - Ground injection system for oil well blockage removal - Google Patents
Ground injection system for oil well blockage removal Download PDFInfo
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- CN112282701A CN112282701A CN201910674573.5A CN201910674573A CN112282701A CN 112282701 A CN112282701 A CN 112282701A CN 201910674573 A CN201910674573 A CN 201910674573A CN 112282701 A CN112282701 A CN 112282701A
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- 238000002347 injection Methods 0.000 title claims abstract description 65
- 239000007924 injection Substances 0.000 title claims abstract description 65
- 239000003129 oil well Substances 0.000 title claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 101
- 238000004519 manufacturing process Methods 0.000 claims abstract description 51
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 28
- 238000011084 recovery Methods 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 11
- 238000000605 extraction Methods 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 105
- 238000005086 pumping Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 238000004064 recycling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 241000191291 Abies alba Species 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- -1 asphaltene Substances 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008096 xylene 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
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a ground injection system for oil well blockage removal, which belongs to the technical field of oil and gas production and comprises a pressurized injection device, a blockage removal agent tank and a continuous oil pipe; the inlet of the pressurized injection device is communicated with the outlet of the blocking remover tank, and the outlet of the pressurized injection device is communicated with the oil production pipe; one end of the coiled tubing is inserted into a hollow ring sleeve formed between the oil production pipe and the casing pipe, the other end of the coiled tubing is communicated with an inlet of a suction device, and an outlet of the suction device is communicated with an inlet of the blocking remover tank. The ground injection system for oil well blockage removal provided by the invention can realize the circulating flow of the blockage removal agent in the oil extraction pipe, can improve the blockage removal efficiency and reduce the blockage removal cost, and simultaneously avoids the pollution of impurities in the blockage removal agent to the stratum.
Description
Technical Field
The invention relates to the technical field of oil and gas production, in particular to a ground injection system for oil well blockage removal.
Background
The crude oil produced in the oil well contains hydrocarbons as the main component, and also contains a certain amount of paraffin, asphaltene, colloid and the like, and along with the gradual reduction of the production pressure and temperature and the continuous separation of gas, the substances are easy to separate out and adhere to the inner wall of the oil production pipe to cause blockage, so the oil production pipe needs to be unblocked.
At present, an oil extraction pipe is usually deblocked by adopting an asphalt dispersant and a paraffin removal deblocking agent, the deblocking agent is usually injected into the oil extraction pipe to be deblocked at one time, for the oil extraction pipe which is severely blocked, the dissolution time is long due to more blocking substances, and more deblocking agents are added at one time.
However, when the blocking remover is injected into the oil production pipe at one time, the blocking remover has poor blocking removing effect because the blocking object cannot be dissolved sufficiently; in addition, the blocking remover can not be discharged back to the ground, so that the blocking remover can not be recycled, the blocking removal cost is increased, and impurities dissolved in the blocking remover are injected into the stratum, so that the stratum is polluted.
Disclosure of Invention
The invention provides a ground injection system for oil well blockage removal, which can realize the circular flow of a blockage removal agent in an oil extraction pipe, improve the blockage removal efficiency and reduce the blockage removal cost; meanwhile, the pollution of impurities dissolved by the blocking remover to the stratum is also avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a ground injection system for oil well blockage removal, which comprises a pressurized injection device, a blockage removal agent tank and a swabbing pipe, wherein the pressurized injection device is connected with the pumping pipe; the inlet of the pressurized injection device is communicated with the outlet of the blocking remover tank, and the outlet of the pressurized injection device is communicated with the oil production pipe; one end of the swabbing pipe is inserted into a hollow ring sleeve formed between the oil production pipe and the sleeve, the other end of the swabbing pipe is communicated with an inlet of a suction device, and an outlet of the suction device is communicated with an inlet of the blockage removing agent tank.
The device further comprises a thin oil tank, wherein an outlet of the blocking remover tank is communicated with an inlet of the pressurization injection device through a first pipeline, and the first pipeline is provided with a first valve; the thin oil tank is connected to the first pipeline between the first valve and the suction device through a second pipeline, and a second valve is arranged on the second pipeline.
Furthermore, a third pipeline is arranged between the blocking remover tank and the thin oil tank, and a third valve is arranged on the third pipeline.
Furthermore, the thin oil tank is provided with scale marks.
Further, the device also comprises a mixing tank; the well mouth of blending tank respectively with unblock agent jar and thin oil tank intercommunication, the export of blending tank with pressurization injection apparatus's import intercommunication, perhaps be connected to first valve with on the first pipeline between the pressurization injection apparatus.
Further, the first pipeline is provided with a first flow meter, and the first flow meter is positioned between the first valve and the blocking remover tank; and a second flow meter is arranged on the second pipeline and is positioned between the second valve and the thin oil tank.
Further, the device also comprises a recovery tank; a filtering device for filtering impurities in the blocking remover is arranged in the recovery tank; the inlet of the recovery tank is communicated with the outlet of the suction device, and the outlet of the recovery tank is connected with the inlet of the blocking remover tank.
Furthermore, a valve is arranged on a pipeline between the outlet of the recovery tank and the blocking remover tank.
Further, the suction device is an oil well pump.
Further, the pressurizing and injecting device is a pump truck.
Compared with the prior art, the ground injection system for oil well blockage removal provided by the invention has the following advantages:
the ground injection system for oil well blockage removal provided by the invention injects the blockage removal agent into the oil production pipe through the pressurized injection device, the blockage removal agent dissolves the scale attached to the wall of the oil production pipe and flows into the hollow part of the ring sleeve, the blockage removal agent is sucked to the blockage removal agent tank through the suction pipe with one end connected with the suction device and then is sucked to the oil production pipe through the pressurized injection device, and the circulation use of the blockage removal agent is completed.
Compared with the prior art that the blocking remover is injected into the oil production pipe at one time, the ground injection system for oil well blocking removal provided by the invention can realize the recycling of the blocking remover and the pumping of the blocking remover to the ground, can improve the blocking removal efficiency and reduce the blocking removal cost, and simultaneously avoids the pollution of impurities dissolved in the blocking remover to the stratum.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions and the advantages brought by the technical features will be further explained in detail in the detailed description of the embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below, it is obvious that the drawings in the following description are only a part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a surface injection system for well unblocking according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a thin oil tank arrangement provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third valve arrangement provided by an embodiment of the present invention;
fig. 4 is a schematic layout diagram of a first flow meter and a second flow meter provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a mixing tank arrangement provided by an embodiment of the present invention;
fig. 6 is a schematic layout diagram of a recovery tank according to an embodiment of the present invention.
Description of reference numerals:
10-producing string;
20-a swabbing pipe;
30-a pressurized injection device;
40-a blocking remover tank;
50-a suction device;
60-thin oil tank;
70-a first conduit;
71-a first valve;
72-first flow meter;
80-a second conduit;
81-a second valve;
82-a second flow meter;
90-a third pipeline;
91-a third valve;
100-a fourth conduit;
101-a fourth valve;
102-a third flow meter;
110-a fifth pipeline;
111-a fifth valve;
112-a fourth flow meter;
120-a sixth pipeline;
121-a sixth valve;
130-a mixing tank;
140-a recovery tank;
141-seventh valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a surface injection system for oil well blockage relieving provided by the embodiment of the invention comprises a pressurized injection device 30, a blockage relieving agent tank 40 and a swabbing pipe 20; the inlet of the pressurizing injection device 30 is communicated with the outlet of the blocking remover tank 40, and the outlet of the pressurizing injection device 30 is communicated with the oil production pipe 10; one end of the pumping pipe 20 is inserted into the hollow of the annular sleeve formed between the oil production pipe 10 and the casing pipe, the other end of the pumping pipe 20 is communicated with the inlet of the pumping device 50, and the outlet of the pumping device 50 is communicated with the inlet of the blocking remover tank 40.
Specifically, the oil extraction device generally comprises an oil extraction tree arranged at a wellhead and an oil extraction pipe 10 communicated with the oil extraction tree, wherein the oil extraction pipe 10 is arranged in the oil extraction well and forms a hollow ring sleeve with the well cementation casing. The bottom end of the oil production pipe 10 is hollow and communicated with the ring sleeve; the oil production pipe 10 gradually forms scale on the pipe wall in the oil production process, which easily causes the oil production pipe 10 to be blocked to influence the oil production efficiency, so the oil production pipe 10 needs to be unblocked.
The pressurized injection device 30, the blocking remover tank 40 and the suction device 50 are arranged on the ground and are arranged close to the oil production well to be blocked, generally, the pressurized injection device 30 usually selects a pump truck, and the pump truck has mobility and can block the oil production wells at different positions; of course, the pressurized injection device 30 may be other devices, such as a pressurizing pump. The blocking remover tank 40 is used for containing a blocking remover, and the blocking remover is used for dissolving scale generated on the pipe wall of the oil production pipe 10; wherein, the inlet of the pump truck is communicated with the outlet of the blocking remover tank 40 through a pipeline, and the outlet of the pump truck is connected to the Christmas tree through a pipeline and is communicated with the oil production pipe 10 through the Christmas tree; when the oil production pipe 10 needs to be unplugged, the pump truck is started to pump the plugging removal agent in the plugging removal agent tank 40 into the oil production pipe 10, so that the plugging removal agent dissolves the scale of the oil production pipe 10, and the dissolved scale flows downwards along the oil production pipe 10 along with the plugging removal agent and flows into the hollow part of the ring sleeve.
The suction device 50 is generally set as a circulating pump, the outlet of the circulating pump is communicated with the inlet of the blocking remover tank 40, the inlet of the circulating pump is communicated with one end of the pumping pipe 20, and the other end of the pumping pipe 20 can be inserted into the hollow of the loop and can be lowered to the bottom of the well; or one end of the swabbing pipe close to the wellhead is connected into a branch in the Christmas tree, and the blocking remover in the hollow of the annular sleeve is extracted through the Christmas tree; the plugging agent at the bottom of the well can be pumped to the ground by using the pumping pipe 20 and the circulating pump and returns to the plugging agent tank 40, so that the plugging agent can be recycled, and the scale is continuously dissolved.
It is understood that the production string 10 in this embodiment is in hollow communication with the annulus, and the deblocking agent may be injected from the annulus or into the production string 10, and accordingly the swabbing pipe 20 may be inserted from the production string 10 or the annulus, and that the embodiment is preferred in which the deblocking agent is injected from the production string 10 and the swabbing pipe 20 is inserted into the annulus.
The ground injection system for oil well unblocking that this embodiment provided, its unblock agent pours into in the oil production pipe 10 into through pressurization injection device 30, and will unblock agent take out to ground and flowback to unblock agent jar 40 from the well through suction device 50, can promote to unblock agent's cyclic utilization and with unblock agent suction to ground, can promote to unblock efficiency and reduce the unblock cost, simultaneously, also avoid knowing the pollution of blocking agent to the stratum.
As shown in fig. 2, the present embodiment further includes a thin oil tank 60; the outlet of the blocking remover tank 40 is communicated with the inlet of the pressurized injection device 30 through a first pipeline 70, and the first pipeline 70 is provided with a first valve 71; the thin oil tank 60 is connected to the first line 70 between the first valve 71 and the pressure injection device 30 through a second line 80, and the second line 80 is provided with a second valve 81.
Specifically, because the blocking remover generally contains benzene, toluene, xylene and the like, and the cost is high, a certain amount of thin oil can be doped into the blocking remover in a proper amount under the condition of meeting the blocking removal requirement; the thin oil tank 60 provided by the embodiment is used for containing thin oil, and according to the degree of scaling of the oil production pipe 10, a certain amount of thin oil is doped in the blocking remover to form the blocking remover containing a certain proportion of thin oil, so that the use of the blocking remover can be saved, and the blocking removal cost of the oil production well can be saved; the first pipeline 70 is provided with a first valve 71, and the thin oil tank 60 is connected to the pressurized injection device 30 through a second pipeline 80, or the thin oil tank 60 is connected to the first pipeline 70 between the first valve 71 and the pressurized injection device 30 through the second pipeline 80; the second valve 81 can be selectively closed or opened depending on the area and thickness of the riser 10 being fouled.
For example, when the scaling thickness of the oil production pipe 10 is large, the first valve 71 is opened, and the second valve 81 is closed, so that the blocking remover can be introduced into the oil production pipe 10 to enhance the dissolution of the scaling on the oil production pipe 10; when the structural thickness of the oil production pipe 10 is smaller, the second valve 81 and the first valve 71 can be opened, and a certain amount of thin oil is doped into the blocking remover, so that the using amount of the blocking remover is reduced, and the cost is saved; after the scale on the oil production pipe 10 is dissolved, in order to make the blocking remover attached to the pipe wall of the oil production pipe 10 flow into the well bottom and pumped to the ground, the first valve 71 can be closed and the second valve 81 can be opened, and the thin oil is injected into the oil production pipe 10 through the pressurizing injection device 30, so that the blocking remover in the oil production pipe 10 is pressed to the well bottom and the ground is removed, and the pollution of the blocking remover to the stratum is avoided.
As shown in fig. 3, in order to accurately blend the amount of the thin oil in the blocking remover and form the blocking remover with a certain ratio, the embodiment may be provided with a first flow meter 72 in the first pipeline 70, and the first flow meter 72 is located between the first valve 71 and the blocking remover tank 40, and is used for detecting the flow rate of the blocking remover flowing to the pressurized injection device 30; a second flow meter 82 is arranged on the second pipeline 80, and the second flow meter 82 is positioned between the second valve 81 and the thin oil tank 60 and is used for detecting the flow of the thin oil flowing into the pressure injection device 30; the thin oil and the blocking remover may be mixed in the first pipe 70 between the first valve 71 and the thick oil device, and the blocking remover mixed with a certain amount of thin oil flows to the pressurized injection device 30 and into the production tubing 10. According to the embodiment, the amount of the blocking remover and the amount of the thin oil are accurately controlled, the blocking remover which meets a certain proportion relation is matched, the requirement for dissolving scale is met, meanwhile, the amount of the blocking remover is saved, and the blocking removing cost is reduced.
As shown in fig. 4, this example also provides another scheme for blending a thin oil in a blocking remover, which is as follows: a third pipeline 90 is arranged between the blocking remover tank 40 and the thin oil tank 60, and a third valve 91 is arranged on the third pipeline 90. The blocking remover tank 40 may be provided with a plurality of outlets, one of which is connected to the first pipeline 70, one of which is connected to the third pipeline 90, and the other end of the third pipeline 90 is connected to an inlet of the thin oil tank 60, and the blocking remover may inject part of the blocking remover into the thin oil tank 60 through the third pipeline 90, and the thin oil and the blocking remover are mixed and then delivered to the pressurized injection device 30 through the second pipeline 80.
When the blocking remover is required to be mixed with the thin oil for use, the first valve 71 and the second valve 81 are closed, the third valve 91 is opened, the blocking remover in the blocking remover tank 40 flows into the thin oil tank 60 through the third pipeline 90, and the thin oil is mixed with the blocking remover; after mixing is completed, the third valve 91 may be closed and the second valve 81 opened, so that the plugging agent mixed with the thin oil flows to the pressurized injection device 30 through the second pipeline 80 and flows into the production string 10.
It can be understood that, in order to accurately incorporate the amount of the thin oil in the blocking remover and thus to prepare the blocking remover with a certain proportioning relationship, the thin oil to be incorporated may be previously injected into the thin oil tank 60, and since the thin oil tank 60 has scale marks therein, the injection amount of the thin oil in the thin oil tank 60 may be controlled, and then the blocking remover may be injected into the thin oil tank 60 and the blocking remover in the thin oil tank 60 may be injected to a specified level, thus to prepare the blocking remover with the thin oil with a certain proportioning relationship.
Alternatively, as shown in fig. 5, the surface injection system for oil well blockage relieving provided in this embodiment further includes a mixing tank 130, an inlet of the mixing tank 130 is respectively communicated with the blockage relieving agent tank 40 and the thin oil tank 60, and an outlet of the mixing tank 130 is communicated with an inlet of the pressurized injection device 30, or is connected to the first pipeline 70 between the first valve 71 and the pressurized injection device 30.
Specifically, the mixing tank 130 is used for mixing the thin oil and the blocking remover, so that the blocking remover and the thin oil can be uniformly mixed; the blocking remover tank 40 is communicated with an inlet of the mixing tank 130 through a fourth pipeline 100, a third flow meter 102 and a fourth valve 101 are arranged on the fourth pipeline 100, the third flow meter 102 can be arranged between the blocking remover tank 40 and the fourth valve 101, and the third flow meter 102 can measure the flow of the blocking remover flowing into the mixing tank 130 from the blocking remover tank 40; the thin oil tank 60 is connected to an inlet of the mixing tank 130 through a fifth pipeline 110 or connected to a fourth pipeline 100 between the fourth valve 101 and the mixing tank 130, a fourth flow meter 112 and a fifth valve 111 are arranged on the fifth pipeline 110, the fourth flow meter 112 can be arranged between the thin oil tank 60 and the fifth valve 111, and the fourth flow meter 112 is used for measuring the flow rate of the thin oil flowing from the thin oil tank 60 to the mixing tank 130; the outlet of the mixing tank 130 is connected to the pressurized injection device 30 or the first pipeline 70 through a sixth pipeline 120, and a sixth valve 121 is disposed on the sixth pipeline 120, and the sixth valve 121 is used for controlling the on-off of the sixth pipeline 120.
When a certain amount of thin oil needs to be doped into the blocking remover, the first valve 71, the second valve 81 and the sixth valve 121 are closed, the fourth valve 101 is opened to inject the blocking remover into the mixing tank 130, the fifth valve 111 is opened to inject the thin oil into the mixing tank 130, or the blocking remover is injected into the mixing tank 130 first, and then the thin oil is injected into the mixing tank 130; the flow rate of the blocking remover injected into the mixing tank 130 is detected by the third flow meter 102, and the flow rate of the thin oil injected into the mixing tank 130 is detected by the fourth flow meter 112, so that the blocking remover containing a certain proportion of thin oil can be formed in the mixing tank 130.
As shown in fig. 6, the present embodiment is further provided with a recovery tank 140, a filtering device for filtering impurities in the blocking remover is arranged in the recovery tank 140, an inlet of the recovery tank 140 is communicated with an outlet of the suction device 50, and an outlet of the recovery tank 140 is connected with an inlet of the blocking remover tank 40.
Specifically, the recovery tank 140 is disposed between the suction device 50 and the blocking remover tank 40, an inlet of the recovery tank 140 is communicated with an outlet of the suction device 50, an outlet of the recovery tank 140 is communicated with an inlet of the blocking remover tank 40, and under the action of the suction device 50, the blocking remover in the well can be sucked to the ground and conveyed into the recovery tank 140. The recycling tank 140 is used for temporarily storing the deblocking agent pumped to the ground by the pumping device 50, the deblocking agent pumped to the ground contains a certain amount of impurities (part of scale is mixed into the deblocking agent), in order to remove the impurities in the deblocking agent, a filtering device, such as a filtering screen, is arranged in the recycling tank 140, the filtering device is arranged in the middle part of the recycling tank 140 and is positioned between the inlet and the outlet of the recycling tank 140, and the filtering device can filter the impurities in the deblocking agent flowing through the recycling tank 140. It will be appreciated that the recovery tank 140 may be vertically mounted with respect to the ground such that the plugging agent flows through the filter means under the dual action of gravity and the force of impact generated by the suction device 50, thereby enhancing the filtering efficiency and effectiveness of the plugging agent.
As shown in fig. 6, in this embodiment, a seventh valve 141 is disposed on a pipeline connecting the recovery tank 140 and the deblocking agent tank 40, the seventh valve 141 is used for controlling the on-off of the pipeline between the deblocking agent tank 40 and the recovery tank 140, and if the deblocking agent in the recovery tank 140 needs to be recycled, the seventh valve 141 can be opened, so that the recycling of the deblocking agent can be realized, and the cost can be saved. It can be understood that, in the process of cleaning up the scale of the oil production pipe 10 once, the seventh valve 141 is normally opened, so that the blocking remover can be circularly injected into the oil production pipe 10, the blocking removing efficiency and effect are improved, and after the blocking removing operation is finished, the seventh valve 141 can be closed, so that the blocking remover is stored in the recovery tank 140.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A ground injection system for oil well blockage removal is characterized by comprising a pressurized injection device, a blockage removal agent tank and a swabbing pipe;
the inlet of the pressurized injection device is communicated with the outlet of the blocking remover tank, and the outlet of the pressurized injection device is communicated with the oil production pipe;
one end of the swabbing pipe is inserted into a hollow ring sleeve formed between the oil production pipe and the sleeve, the other end of the swabbing pipe is communicated with an inlet of a suction device, and an outlet of the suction device is communicated with an inlet of the blockage removing agent tank.
2. The surface injection system for oil well plug removal of claim 1, further comprising a thin oil tank;
the outlet of the blocking remover tank is communicated with the inlet of the pressurized injection device through a first pipeline, and the first pipeline is provided with a first valve;
the thin oil tank is connected to the first pipeline between the first valve and the suction device through a second pipeline, and a second valve is arranged on the second pipeline.
3. The surface injection system for oil well deblocking of claim 2, wherein a third line is disposed between the deblocking agent tank and the thin oil tank, the third line having a third valve disposed thereon.
4. The surface injection system for oil well plug removal of claim 3, wherein the thin oil tank is provided with graduations.
5. The surface injection system for oil well plug removal of claim 2, further comprising a mixing tank;
the inlet of the mixing tank is respectively communicated with the blocking remover tank and the thin oil tank, and the outlet of the mixing tank is communicated with the inlet of the pressurizing injection device or is connected to a first pipeline between a first valve and the pressurizing injection device.
6. The surface injection system for well unblocking of claim 2,
the first pipeline is provided with a first flow meter, and the first flow meter is positioned between the first valve and the blocking remover tank;
and a second flow meter is arranged on the second pipeline and is positioned between the second valve and the thin oil tank.
7. The surface injection system for oil well plug removal of claim 1, further comprising a recovery tank;
a filtering device for filtering impurities in the blocking remover is arranged in the recovery tank;
the inlet of the recovery tank is communicated with the outlet of the suction device, and the outlet of the recovery tank is connected with the inlet of the blocking remover tank.
8. The surface injection system for oil well unblocking of claim 7 wherein a valve is provided on the pipeline between the outlet of the recovery tank and the unblocking agent tank.
9. The surface injection system for oil well unblocking of claim 1 wherein the suction device is an oil pump.
10. The surface injection system for oil well unblocking of claim 1 wherein the pressurized injection device is a pump truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910674573.5A CN112282701A (en) | 2019-07-25 | 2019-07-25 | Ground injection system for oil well blockage removal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910674573.5A CN112282701A (en) | 2019-07-25 | 2019-07-25 | Ground injection system for oil well blockage removal |
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| CN112282701A true CN112282701A (en) | 2021-01-29 |
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| CN201910674573.5A Pending CN112282701A (en) | 2019-07-25 | 2019-07-25 | Ground injection system for oil well blockage removal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635669A (en) * | 2022-03-14 | 2022-06-17 | 山东石大油田技术服务股份有限公司 | Equipment and process flow suitable for blockage removal of oil-water well |
| CN116201505A (en) * | 2021-11-30 | 2023-06-02 | 中国石油天然气股份有限公司 | Electric pump well blocking removal system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN116201505A (en) * | 2021-11-30 | 2023-06-02 | 中国石油天然气股份有限公司 | Electric pump well blocking removal system and method |
| CN114635669A (en) * | 2022-03-14 | 2022-06-17 | 山东石大油田技术服务股份有限公司 | Equipment and process flow suitable for blockage removal of oil-water well |
| CN114635669B (en) * | 2022-03-14 | 2024-06-18 | 山东石大油田技术服务股份有限公司 | Equipment and process flow suitable for oil-water well unblocking |
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