CN108999594B - Paraffin removal device for oil field self-injection well shaft - Google Patents
Paraffin removal device for oil field self-injection well shaft Download PDFInfo
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- CN108999594B CN108999594B CN201811214708.1A CN201811214708A CN108999594B CN 108999594 B CN108999594 B CN 108999594B CN 201811214708 A CN201811214708 A CN 201811214708A CN 108999594 B CN108999594 B CN 108999594B
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- paraffin removal
- ball
- shaft
- paraffin
- balls
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Classifications
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- 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
Abstract
The invention relates to a paraffin removal device for a shaft of an oilfield self-injection well, and belongs to the technical field of oil extraction. Comprises a ball service system, a paraffin removal system and a ball receiving system; the ball serving system is used for manually controlling the throwing quantity of the paraffin removal balls, the paraffin removal balls sink to the bottom of a shaft by gravity, the paraffin removal balls continuously strike the inner wall of the shaft in the sinking process, partial paraffin blocks attached to the upper part of the inner wall of the shaft are scraped, the paraffin removal balls start to float upwards along with the continuous dissolution of the metal composite material on the surface layer of the paraffin removal balls, the paraffin removal balls continuously strike the inner wall of the shaft in the floating rotation process, and the paraffin removal balls and the scraped paraffin blocks enter the ball receiving system along with the oil flow, so that paraffin removal operation is finished. Compared with the prior art, the invention has the advantages that: the equipment is simple, the operation is simple and convenient, and the operation can be performed by a single person; no external energy is needed; wax removal can be performed at different positions in the well bore; the workload and the production cost of production personnel are reduced; and the risk of paraffin removal operation is reduced.
Description
Technical Field
The invention relates to a paraffin removal device for a shaft of an oilfield self-injection well, and belongs to the technical field of oil extraction.
Background
When crude oil flows up from the bottom of the well through the oil pipe, wax deposition phenomenon is generated on the inner wall of the oil well shaft. The wax deposition of the shaft has two processes, namely, the wax dissolution capability of crude oil to wax is reduced along with the gradual reduction of temperature and pressure, wax molecules are gradually separated out in a crystal form, and the separated wax molecule crystals are continuously gathered and deposited on the wall of the pipe, so that the inner diameter of the oil pipe is reduced, the production capability of the well is affected, and the oil well is stopped when serious, so that the normal production is affected. Therefore, in the production process of the wax-containing oil well, the necessary paraffin removal and prevention measures are an important precondition for ensuring the high and stable production of the oil well.
Currently, aiming at the problem of paraffin removal of a self-injection well shaft, common methods comprise a mechanical paraffin removal technology, a thermal paraffin removal technology, a chemical paraffin removal technology and a microbial paraffin removal technology. The mechanical paraffin removal technology can cause extra loss to equipment in the paraffin removal process, and even accidents such as top drilling, well clamping and the like are likely to happen; the thermal wax removal technology has higher energy consumption and cost; the selection of the paraffin removal agent in the chemical paraffin removal technology has difficulty and high paraffin removal cost; the microbial paraffin removal technology has slow effect.
Disclosure of Invention
The invention aims to provide a paraffin removal device for a shaft of a self-injection well of an oil field. The method aims at scraping the wax on the inner wall part of the shaft in the sinking process by putting a certain number of paraffin removal balls, continuously impacting the inner wall of the shaft on the irregular surface layer in the floating rotation process, scraping the wax on the inner wall of the shaft, cutting up the wax blocks in the shaft and improving the production condition of a self-injection oil well through repeated operation for a plurality of times.
The paraffin removal device for the shaft of the self-injection well in the oil field consists of a service system, a paraffin removal system and a ball receiving system.
The service system consists of a quick-opening blind plate of a service room, a service control valve, a lubricator, a Christmas tree paraffin removal valve and a main valve of the Christmas tree, and aims to control the putting quantity of paraffin removal balls, reduce the risk of paraffin removal operation and enable the paraffin removal balls to be put into a shaft by means of gravity.
The paraffin removal ball consists of a surface layer and an internal entity; the surface layer of the paraffin removal ball is provided with a layer of soluble metal composite material, so that the paraffin removal ball can sink by gravity, the internal entity of the paraffin removal ball is a nonmetallic material with density less than crude oil and is insoluble in crude oil and water, the purpose is to enable the surface layer of the paraffin removal ball to float upwards after being dissolved, paraffin removal operation is carried out, and the surface of the internal entity of the paraffin removal ball is irregular, so that paraffin blocks on the inner wall of a shaft can be scraped.
The paraffin removal system consists of a shaft and a paraffin removal ball, wherein the paraffin removal ball moves irregularly on the inner wall of the shaft, and the paraffin removal ball is used for continuously impacting the inner wall of the shaft, and the irregular surface of the paraffin removal ball scrapes down paraffin blocks on the inner wall of the shaft.
The ball collecting system consists of a cut-off valve, a production pipe, a front control valve, a rear control valve, a ball collecting chamber, a filter screen, a ball collecting chamber quick-opening blind plate and a cleaning valve, and is used for recovering paraffin removal balls and residual crude oil.
Compared with the prior art, the invention has the advantages that: the equipment is simple, the operation is simple and convenient, and the operation can be performed by a single person; no external energy is needed; wax removal can be performed at different positions in the well bore; the workload and the production cost of production personnel are reduced; and the risk of paraffin removal operation is reduced.
Drawings
FIG. 1 is a schematic diagram of the operation of a paraffin removal apparatus for a self-injection well bore in an oilfield.
The figure shows: 1. the quick-opening blind plate of the service chamber is 2, the service chamber is 3, the service control valve is 4, the lubricator flange is 5, the lubricator is 6, the Christmas tree paraffin removal valve is 7, the main valve of the Christmas tree is 8, the shaft is 9, the paraffin removal ball is 10, the paraffin block is 11, the oil layer is 12, the cut-off valve is 13, the production pipe is 14, the front control valve is 15, the rear control valve is 16, the ball collecting chamber is 17, the filter screen is 18, the quick-opening blind plate of the ball collecting chamber is 19, and the cleaning valve is 19.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. FIG. 1 is a schematic diagram of the operation of a paraffin removal apparatus for a self-injection well bore in an oilfield.
The invention provides a paraffin removal device for a shaft of an oilfield self-injection well. The device consists of a ball serving system, a paraffin removal system and a ball receiving system. The service system comprises a service room quick-opening blind plate, a service room, a service control valve, a lubricator, a Christmas tree paraffin removal valve and a main valve of the Christmas tree, wherein one end of the service room 2 is provided with the quick-opening blind plate 1, the other end of the service room is connected with the service control valve 3, the service control valve 3 is connected with the lubricator 5 through the lubricator flange 4, the purpose of the service system is to control the throwing quantity of paraffin removal balls 9, reduce the paraffin removal operation risk and throw a certain quantity of paraffin removal balls 9 into a shaft by means of gravity.
The paraffin removal ball 9 consists of a surface layer and an internal entity; the surface layer of the paraffin removal ball 9 is provided with a layer of soluble metal composite material, so that the paraffin removal ball 9 can sink by gravity, the internal entity of the paraffin removal ball 9 is a nonmetallic material with density less than that of crude oil and is insoluble in the crude oil and water, the aim is to enable the surface layer of the paraffin removal ball 9 to float upwards after being dissolved, paraffin removal operation is carried out, the surface of the internal entity of the paraffin removal ball 9 is irregular, and the aim is to scrape down the paraffin blocks 10 on the inner wall of the shaft 8.
The paraffin removal system consists of a shaft 8 and a paraffin removal ball 9, wherein the paraffin removal ball 9 moves irregularly in the shaft 8, and the paraffin removal ball 9 is used for continuously impacting the inner wall of the shaft, and the irregular surface of the paraffin removal ball 9 scrapes off paraffin blocks in the shaft 8.
The ball collecting system comprises a cut-off valve 12, a production pipe 13, a front control valve 14, a rear control valve 15, a ball collecting chamber 16, a filter screen 17, a ball collecting chamber quick-opening blind plate 18 and a cleaning valve 19, wherein the filter screen 17 is used for enabling oil to flow through, isolating paraffin balls, the quick-opening blind plate 18 is used for opening the ball collecting chamber 16, recovering paraffin balls, and the cleaning valve 19 is used for recovering residual crude oil.
The process of the invention for paraffin removal of the shaft is as follows:
confirming that the service control valve 3 is in a closed state, opening the quick-opening blind plate 1 of the service chamber, putting a certain number of paraffin removal balls 9 into the service chamber 2, wherein the number of the paraffin removal balls is proper to prevent an oil well from being blocked and the paraffin removal effect is optimal, closing the quick-opening blind plate 1 of the service chamber, opening the service control valve 3, opening the Christmas tree paraffin removal valve 6, and closing the Christmas tree paraffin removal valve 6 and the service control valve 3 after the paraffin removal balls 9 pass through the Christmas tree paraffin removal valve 6; because the main valve 7 of the Christmas tree is in a normally open state, the paraffin removal ball 9 begins to sink by gravity, in the sinking process, the paraffin block 10 on the inner wall part of the shaft is scraped, the paraffin removal ball 9 is sunk to the bottom of the shaft 8, in the turbulent state of crude oil, the paraffin removal ball 9 does irregular motion, and the paraffin removal ball 9 continuously impacts the inner wall of the shaft to scrape the paraffin block 10 on the inner wall of the shaft 8. After a period of time, the soluble metal composite material on the surface layer of the paraffin removal ball 9 begins to dissolve, after the soluble metal composite material is dissolved to a certain extent, as the density of the internal entity of the paraffin removal ball 9 is lower than that of crude oil in the shaft 8, the paraffin removal ball 9 begins to float upwards, and in the process of floating upwards and rotating, the irregular surface of the paraffin removal ball 9 continuously impacts the inner wall of the shaft and scrapes down the paraffin block 10, so that paraffin removal operation can be performed on the whole shaft 8. The front control valve 14 and the rear control valve 15 are opened, the cut-off valve 12 on the production pipe 13 is closed, the paraffin removal ball 9 flows to the ball receiving chamber 16 along with the oil flow, the oil flow flows through the filter screen 17 and flows to the production pipe 13, the paraffin removal ball 9 is remained in the ball receiving chamber, and the above operation is repeated until the paraffin removal operation is completed. After the paraffin removal is finished, the front control valve 14 is closed, the cut-off valve 12 on the production pipe 11 is opened, the rear control valve 15 is closed, the cleaning valve 19 is opened, residual crude oil in the ball receiving chamber 16 is recovered, after the recovery is finished, the ball receiving chamber quick-opening blind plate 18 of the ball receiving chamber 16 is opened, the paraffin removal ball 9 is taken out, the ball receiving chamber quick-opening blind plate 18 is closed, and the paraffin removal operation is finished.
In summary, compared with the defects and shortcomings of the prior art, the invention has the following beneficial effects:
(1) The equipment is simple, the operation is simple and convenient, and the operation can be performed by a single person;
(2) No external energy is needed;
(3) Wax removal can be performed at different positions in the well bore;
(4) The workload and the production cost of production personnel are reduced;
(5) And the risk of paraffin removal operation is reduced.
Claims (3)
1. The utility model provides an oil field is from blowing well pit shaft paraffin removal device, the device comprises service system, paraffin removal system, receipts ball system, wherein: the service system consists of a service room quick-opening blind plate, a service room, a service control valve, a lubricator, a Christmas tree paraffin removal valve and a main valve of the Christmas tree, and aims to control the number of the paraffin removal balls, reduce the risk of paraffin removal operation and enable the paraffin removal balls to be thrown into a shaft by means of gravity; the paraffin removal system consists of a shaft and a paraffin removal ball, and aims to scrape down paraffin blocks in the shaft; the ball collecting system consists of a cut-off valve, a production pipe, a front control valve, a rear control valve, a ball collecting chamber, a filter screen, a ball collecting chamber quick-opening blind plate and a cleaning valve, and is used for recovering paraffin removal balls and residual crude oil; the paraffin removal ball consists of a surface layer and an internal entity; the surface layer of the paraffin removal ball is provided with a layer of soluble metal composite material, the internal entity of the paraffin removal ball is a nonmetallic material with density less than that of crude oil and is insoluble in the crude oil and water, and the surface of the internal entity of the paraffin removal ball is irregular; because the main valve of the Christmas tree is in a normally open state, the paraffin removal ball begins to sink by gravity, and in the sinking process, the paraffin block on the inner wall part of the shaft is scraped down and is sunk to the bottom of the shaft; after a period of time, the soluble metal composite material on the surface layer of the paraffin removal ball begins to dissolve, and after the soluble metal composite material is dissolved to a certain extent, the paraffin removal ball begins to float upwards because the density of the internal entity of the paraffin removal ball is lower than that of crude oil in a shaft, and the irregular surface of the paraffin removal ball continuously impacts the inner wall of the shaft and scrapes down paraffin blocks, so that paraffin removal operation can be performed on the whole shaft.
2. An oilfield self-injection well bore paraffin removal device as claimed in claim 1, wherein the service control valve is connected to a lubricator flange for the purpose of reducing the risk of paraffin removal operations.
3. The oilfield self-injection well shaft paraffin removal device according to claim 1, wherein the filter screen is provided with a plurality of round holes smaller than the inner diameter of the paraffin removal ball body, and the purpose of the paraffin removal ball is to allow oil to flow through and isolate the paraffin removal ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214708.1A CN108999594B (en) | 2018-10-18 | 2018-10-18 | Paraffin removal device for oil field self-injection well shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811214708.1A CN108999594B (en) | 2018-10-18 | 2018-10-18 | Paraffin removal device for oil field self-injection well shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999594A CN108999594A (en) | 2018-12-14 |
| CN108999594B true CN108999594B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811214708.1A Active CN108999594B (en) | 2018-10-18 | 2018-10-18 | Paraffin removal device for oil field self-injection well shaft |
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| CN (1) | CN108999594B (en) |
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| US4743545A (en) * | 1984-08-09 | 1988-05-10 | Torobin Leonard B | Hollow porous microspheres containing biocatalyst |
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| CN101408098A (en) * | 2008-11-19 | 2009-04-15 | 西安长庆科技工程有限责任公司 | Timing automatic ball-throwing apparatus and method |
| CN102371045A (en) * | 2010-08-11 | 2012-03-14 | 耐克国际有限公司 | Floating golf ball |
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| CN204035142U (en) * | 2014-07-21 | 2014-12-24 | 张家港保税区金品化工机械设备有限公司 | Crude oil well head timing automatic ball-throwing apparatus |
| CN206987785U (en) * | 2017-07-14 | 2018-02-09 | 王春旭 | A kind of novel oil production paraffin cutting wax-proofing apparatus |
| CN108119098A (en) * | 2017-11-15 | 2018-06-05 | 中国石油天然气集团公司 | Well-head wax removal device and method |
| CN207568561U (en) * | 2017-11-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Gas well de-waxing apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002053872A1 (en) * | 2001-01-08 | 2002-07-11 | Xiaoyan Liu | The automatic paraffin scraping device used for oil well |
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| CN101408098A (en) * | 2008-11-19 | 2009-04-15 | 西安长庆科技工程有限责任公司 | Timing automatic ball-throwing apparatus and method |
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| CN206987785U (en) * | 2017-07-14 | 2018-02-09 | 王春旭 | A kind of novel oil production paraffin cutting wax-proofing apparatus |
| CN108119098A (en) * | 2017-11-15 | 2018-06-05 | 中国石油天然气集团公司 | Well-head wax removal device and method |
| CN207568561U (en) * | 2017-11-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Gas well de-waxing apparatus |
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| CN108999594A (en) | 2018-12-14 |
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