CN114059975A - Underground tool for removing abandoned well - Google Patents
Underground tool for removing abandoned well Download PDFInfo
- Publication number
- CN114059975A CN114059975A CN202111631344.9A CN202111631344A CN114059975A CN 114059975 A CN114059975 A CN 114059975A CN 202111631344 A CN202111631344 A CN 202111631344A CN 114059975 A CN114059975 A CN 114059975A
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- Prior art keywords
- tool
- well
- perforating gun
- pressure spray
- casing
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- 239000002360 explosive Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 35
- 230000004913 activation Effects 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 9
- 230000001788 irregular Effects 0.000 claims description 6
- 239000004568 cement Substances 0.000 abstract description 29
- 238000013461 design Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005086 pumping Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000005465 channeling Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the field of petroleum and natural gas, and discloses a chemical abandoned well downhole tool, wherein a perforating gun is in a rectangular design, the perforating gun is in a circular shape, a setting system of the perforating gun adopts a unique groove-shaped structural design, the perforating gun adopts an innovative explosive breakdown casing, the innovative explosive breakdown casing is utilized to breakdown the casing to form a series of horizontal rectangular grooves and realize accurate overlapping, the overlapped horizontal rectangular grooves form 360-degree annular channels on the casing or oil pipe, and the annular channels can penetrate through pores between the casing and cement and between the cement and a stratum, the setting system of the perforating gun adopts the unique groove-shaped structural design and can provide enough surface area for perforating, and as an alternative application technology, the rectangular perforating gun is easier to obtain larger flow cross section area compared with explosion, well cementation cement extrudes the cement through pumping, and cuts off the gaps which are generated by gas and liquid from a vertical channel, thereby the shaft annulus is permanently sealed in the channel, and the well abandoning operation and the well cementation quality are ensured.
Description
Technical Field
The invention relates to the field of petroleum and natural gas operation, in particular to a chemical abandoned well downhole tool.
Background
In the later development process of oil and gas wells, well abandoning operation of wells is generally required to be carried out on the wells in the later development period for the requirements of environmental protection and laws and regulations. At present, the operation of abandoning a well is just started in China, and the process and tools are not mature relatively, so that the operation team has long occupied time and low operation efficiency, and simultaneously, the problems of the quality of the abandoned well, unsuccessful plugging, secondary rework operation and the like exist.
Therefore, the research on the integrated process of combining the advantages of the operation process and avoiding the disadvantages of the operation process matched with the abandoned well, the perforation of a one-trip drilling operation tool, the high-pressure cleaning and the well cementation process becomes the operation problem which needs to be solved urgently in each oil and gas field.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a chemical abandoned well downhole tool, which solves the problems of low operation efficiency, abandoned well quality problem, unsuccessful plugging, secondary rework operation and the like.
A chemical abandoned well downhole tool comprising a perforating gun, a high pressure jetting tool, and further comprising: the bottom fixedly connected with perforation activation instrument of perforation rifle, the bottom fixedly connected with high-pressure spray rinsing instrument of perforation activation instrument, the bottom fixedly connected with high-pressure spray rinsing activation instrument of high-pressure spray rinsing instrument, the bottom fixedly connected with well cementation instrument of high-pressure spray rinsing activation instrument has synthesized the advantage of present abandoning well operation technology and has synthesized optimization abandoning well operation and integration abandoning well operation instrument, realizes one-trip drilling perforation, high-pressure cleaning annular space and well cementation operation, has improved the efficiency of construction greatly, simultaneously very big operating time, reduction equipment and cost of labor.
Furthermore, the perforating gun is in a rectangular design, the perforating gun is in a circular shape, a running system of the perforating gun adopts a unique groove-shaped structure design, the perforating gun adopts an innovative explosive to puncture a casing, the innovative explosive is utilized to puncture the casing to form a series of horizontal rectangular grooves, accurate overlapping is realized, the overlapped horizontal rectangular grooves form 360-degree annular channels on the casing or an oil pipe, and the annular channels can penetrate through pores between the casing and cement and between the cement and a stratum, the running system of the perforating gun adopts the unique groove-shaped structure design and can provide enough surface area for perforating, as an alternative application technology, the rectangular perforating gun is easier to obtain larger flow cross section area compared with explosive perforating, well-cementation cement is squeezed into the cement by pumping to cut off the gaps generated by gas and liquid in a vertical channel, so that the shaft annular space permanently seals the channel, and a perfect isolation zone is formed, so that the well abandoning operation and the well cementation quality are ensured.
Furthermore, the high-pressure spray tool nozzles are positioned at irregular angles, the positions of the high-pressure spray tool nozzles are adjustable, the number of the high-pressure spray tool nozzles is adjustable, the high-pressure spray tool can be activated and opened in a pitching or hydraulic mode, the innovative high-pressure spray tool is used for cleaning cement debris in annular space of the perforating sleeve, and the tool is characterized in that the nozzles are positioned at irregular angles, the optimal configuration and the outlet speed are designed, and jet flow can penetrate through a plurality of perforating sleeves and annular space and can be thoroughly cleaned.
Furthermore, the side part of the well cementation tool is provided with an annular cross section, the hollow circulation inside the well cementation tool is fast and smooth, after the high-pressure spray washing tool finishes the operation, the well cementation operation tool is activated, after the activated tool is circularly cleaned, the plugging material is extruded on the annular cross section, the rheological property of cement is improved by pumping the well cementation tool, a higher-quality cement cementing surface is brought, and the formation of channeling and micro annular gaps is reduced. Plugging material is effectively squeezed into the wellbore and annulus to create a permanent barrier in the well, completing the operation, and thereby completing the integrated well abandonment operation.
The invention has the technical effects and advantages that:
the invention combines the well abandoning operation and the integrated well abandoning operation tool aiming at the defects of long well abandoning operation time, the problem of the well abandoning quality and the like, the technology is carried out by integrally designing the perforation, the high-pressure cleaning and the well cementing tool, and the operation of drilling and abandoning operation, perforation, high-pressure cleaning and cementing operation are realized by the technology, thereby improving the operation efficiency and reducing the operation cost.
The innovative perforating system is specially designed for cement squeezing operation in well abandoning operation, a series of horizontal rectangular grooves are formed by utilizing an innovative explosive to puncture a casing, accurate overlapping is realized, the overlapped horizontal rectangular grooves form 360-degree annular channels on the casing or an oil pipe, and the annular channels can penetrate through pores between the casing and cement and a stratum, the perforating gun feeding system adopts a unique groove-shaped structure design and can provide enough surface area for perforating, as an alternative application technology, a rectangular perforating gun is easier to obtain larger flow sectional area compared with explosive perforating, well cementation cement is squeezed into the cement by pumping to cut off gaps generated by gas and liquid in a vertical channel, so that a shaft annulus permanently seals the channel, a perfect isolation zone is formed, the well abandoning operation and well cementation quality are ensured, an innovative high-pressure injection tool is used for cleaning cement fragments in the annular space in the perforating casing, the tool is characterized in that the nozzle is positioned at an irregular angle and designed optimal configuration and outlet speed, jet flow can penetrate through a plurality of perforated sleeves and annular space and can be thoroughly cleaned, after the high-pressure spray cleaning tool finishes operation, a well cementation operation tool is activated, after the activated tool is circularly cleaned, plugging materials are squeezed and injected on the cross section of the annular space, the rheological property of cement is improved by pumping of the well cementation tool, a higher-quality cement cementing surface is brought, the formation of channeling and micro-annular space is reduced, the plugging materials are effectively squeezed and injected into a shaft and the annular space, a permanent barrier is built in a well, and the operation is finished, so that the integrated well abandoning operation is realized.
Drawings
FIG. 1 is a view showing the structure of the apparatus of the present invention.
The reference signs are: 1. a perforating gun; 2. a perforation activation tool; 3. a high pressure spray tool; 4. activating the tool by high pressure spray washing; 5. a well cementing tool.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the forms of the structures described in the following embodiments are merely examples, and the chemical abandoned downhole tool according to the present invention is not limited to the structures described in the following embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts fall within the scope of the present invention.
The invention provides a chemical abandoned well downhole tool, which comprises a perforating gun 1 and a high-pressure spray washing tool 3 and also comprises the following components in percentage by weight, with reference to fig. 1: the bottom fixedly connected with perforation activation tool 2 of perforation rifle 1, the bottom fixedly connected with high-pressure spray rinsing instrument 3 of perforation activation tool 2, the bottom fixedly connected with high-pressure spray rinsing activation tool 4 of high-pressure spray rinsing instrument 3, the bottom fixedly connected with well cementation tool 5 of high-pressure spray rinsing activation tool 4 has synthesized the advantage of present abandoning well operation technology and has synthesized optimization abandoning well operation and integration abandoning well operation instrument, realizes a drilling perforation, high-pressure cleaning annular space and well cementation operation, has improved the efficiency of construction greatly, simultaneously very big operating time, reduction equipment and cost of labor.
Referring to fig. 1, the perforating gun 1 is of a rectangular design, the perforating gun 1 is of a circular shape, a running system of the perforating gun 1 is of a groove-shaped structure design, the perforating gun 1 is of an innovative explosive breakdown casing, the innovative explosive breakdown casing is utilized to form a series of horizontal rectangular grooves, accurate overlapping is realized, the overlapped horizontal rectangular grooves form 360-degree annular channels on the casing or oil pipe, and the annular channels can penetrate through the pores between the casing and cement and between the cement and the stratum, the running system of the perforating gun 1 adopts a unique groove-shaped structure design and can provide enough surface area for perforation, as an alternative application technology, the rectangular perforating gun 1 is easier to obtain a larger flow cross section compared with explosive perforation, well cementation cement extrudes the cement through pumping, and cuts off the gaps generated by gas and liquid from a vertical channel, so that a permanent annulus of a shaft seals the channel, and a perfect isolation zone is formed, so that the well abandoning operation and the well cementation quality are ensured.
Referring to fig. 1, the nozzles of the high-pressure spray tool 3 are positioned at irregular angles, the position of the nozzles of the high-pressure spray tool 3 is adjustable, the number of the nozzles of the high-pressure spray tool 3 is adjustable, the high-pressure spray tool 3 can be activated and opened by pitching or hydraulic means, and the novel high-pressure spray tool is used for cleaning cement debris in annular space of a perforation casing and is characterized in that the nozzles are positioned at irregular angles and designed optimal configuration and outlet speed, and jet flow can penetrate through a plurality of perforation casings and annular space and can be thoroughly cleaned.
Referring to fig. 1, the side of the well cementing tool 5 is provided with an annular cross section, the hollow circulation inside the well cementing tool 5 is fast and smooth, after the high-pressure spray washing tool 3 finishes the operation, the well cementing tool is activated, after the activated tool is circularly cleaned, the plugging material is squeezed and injected on the annular cross section, the rheological property of the cement is improved by the pumping of the well cementing tool 5, a higher-quality cement cementing surface is brought, the formation of channeling and micro-annular gaps is reduced, the plugging material is effectively squeezed and injected into a shaft and the annular space, so that a permanent barrier is established in a well, the operation is finished, and the integrated well abandoning operation is realized.
The working principle is as follows: when the integrated abandoned well is operated, the well dredging and well washing operation is carried out on the construction well according to the operation design and requirements, after the completion, the integrated abandoned well operation tool is assembled, namely, one-time drilling is carried out to realize perforation, high-pressure spray washing and well cementation operation, the integrated abandoned well tool is arranged on an operation tubular column and is put into a preset design operation position, firstly, the perforation tool is activated to realize annular perforation, a sleeve and a cement annular channel are opened to realize a 360-degree rectangular perforation channel, then, the high-pressure spray washing tool is activated to realize 360-degree high-pressure washing on the annular, annular cement, slurry, scraps and the like are cleaned, the annular space and the pipe wall are thoroughly cleaned, finally, the well cementation tool is activated, the rheological property of the cement is improved by pumping through the well cementation tool, a higher-quality cement cementing surface is brought, annular plugging materials are squeezed in by reducing the formation of channeling and micro annular gaps, and the full combination of the plugging materials with the annular space and the pipe wall is ensured, thereby ensuring the quality of well abandoning operation, and pulling out the tool after completing well cementation operation, thereby realizing the integrated perforation, high-pressure cleaning and well cementation operation process of one-time drilling.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (4)
1. A chemical abandoned well downhole tool comprises a perforating gun (1) and a high-pressure spray washing tool (3), and is characterized by further comprising: the bottom fixedly connected with perforation activation instrument (2) of perforation rifle (1), the bottom fixedly connected with high-pressure spray rinsing instrument (3) of perforation activation instrument (2), the bottom fixedly connected with high-pressure spray rinsing activation instrument (4) of high-pressure spray rinsing instrument (3), the bottom fixedly connected with well cementation instrument (5) of high-pressure spray rinsing activation instrument (4).
2. A chemical well abandonment downhole tool as defined in claim 1, wherein: the perforating gun (1) is designed in a rectangular shape, the perforating gun (1) is designed in a circular shape, a running system of the perforating gun (1) is designed in a groove-shaped structure, and the perforating gun (1) is an innovative explosive breakdown casing.
3. A chemical well abandonment downhole tool as defined in claim 1, wherein: the high-pressure spray rinsing tool (3) nozzle is positioned at an irregular angle, the position of the high-pressure spray rinsing tool (3) nozzle is adjustable, the number of the high-pressure spray rinsing tool (3) nozzles is adjustable, and the high-pressure spray rinsing tool (3) can be activated and opened through a ball throwing mode or a hydraulic mode.
4. A chemical well abandonment downhole tool as defined in claim 1, wherein: the side part of the well cementing tool (5) is provided with an annular cross section, and the hollow circulation in the well cementing tool (5) is fast and smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631344.9A CN114059975A (en) | 2021-12-28 | 2021-12-28 | Underground tool for removing abandoned well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111631344.9A CN114059975A (en) | 2021-12-28 | 2021-12-28 | Underground tool for removing abandoned well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114059975A true CN114059975A (en) | 2022-02-18 |
Family
ID=80230486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111631344.9A Pending CN114059975A (en) | 2021-12-28 | 2021-12-28 | Underground tool for removing abandoned well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114059975A (en) |
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