CN109236220B - Back-off-free rotary tail pipe running tool and method - Google Patents
Back-off-free rotary tail pipe running tool and method Download PDFInfo
- Publication number
- CN109236220B CN109236220B CN201811432631.5A CN201811432631A CN109236220B CN 109236220 B CN109236220 B CN 109236220B CN 201811432631 A CN201811432631 A CN 201811432631A CN 109236220 B CN109236220 B CN 109236220B
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- Prior art keywords
- ball
- tail pipe
- rubber plug
- pipe
- seat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010008 shearing Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention provides a back-off-free rotary tail pipe feeding tool and a back-off-free rotary tail pipe feeding method, and relates to the field of natural gas exploration and development; the tool comprises a central tube and a tail tube connecting cylinder, wherein the tail tube connecting cylinder is nested on the central tube through a connecting ball device; the connecting ball device comprises a push rod arranged in the tail pipe connecting cylinder, a connecting ball and a ball seat arranged in the central pipe, and in a first state, the connecting ball is arranged between the ball seat and the push rod; the ball seat in the central tube is sheared by throwing the ball at the wellhead to hold pressure, and the ball seat and the ejector rod move away from the connecting ball, so that the tail tube connecting cylinder is separated from the central tube, and the aim of feeding the tail tube is fulfilled. The invention can safely and smoothly realize the casing running of the tail pipe, ensure the smooth running of the liner cementing operation, throw balls at the wellhead to hold pressure and release the tail pipe after the tail pipe is in the bottom of the well, ensure the smooth feeding of the rotary tail pipe without back-off, and realize the reliable method; meanwhile, the simple structural design is easy to process, and the production and manufacturing cost is reduced.
Description
Technical Field
The invention relates to the field of natural gas exploration and development, in particular to a back-off-free rotary tail pipe feeding tool and a back-off-free rotary tail pipe feeding method.
Background
The liner cementing can save the development cost of the oil and gas well and save social resources. For this purpose, liner hanger tools such as "liner hanger" (201510956001.8), "a hydrocarbon well liner hanger" (201820244595.9), "an expanded liner hanger with slips" (201711030338.1) and the like have been invented for performing liner cementing operations for hydrocarbon wells. However, these inventions all suffer from the same drawbacks: the tool has the defects of complex structure, high production and processing cost, difficult guarantee of processing precision, unstable performance, difficult establishment of high-pressure circulation in the process of casing running, incapability of rotating a tail pipe due to blockage and clamping in the process of casing running, requirement of back-off releasing operation after sitting and hanging, and the like.
Disclosure of Invention
The invention aims to provide a back-off-free rotary tail pipe setting tool, so as to solve the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the tool comprises a central pipe and a tail pipe connecting cylinder, wherein the tail pipe connecting cylinder is nested on the central pipe through a connecting ball device;
the connecting ball device comprises a push rod arranged on the tail pipe connecting cylinder, a connecting ball and a ball seat arranged in the central pipe,
in a first state, the connecting ball is arranged between the ball seat and the ejector rod;
in the second state, the ball seat and the ram are moved away from the connection ball.
Preferably, in the first state, the tee is mounted inside the base pipe by means of a tee pin.
Preferably, the ejector rod is fixed through an ejector rod hole, the ball seat pin is fixed through a pin hole, and the connecting ball is arranged in the connecting hole.
Preferably, the number of the ejector rod holes and the number of the connecting holes are 6.
Preferably, the tail pipe connecting cylinder comprises a shearing pin, a rubber plug body, a rubber plug framework and a rubber plug seat, wherein the rubber plug body is connected with the rubber plug seat through threads, and the rubber plug body is sleeved with the rubber plug and is pressed and fixed through the rubber plug seat to form an integral tail pipe rubber plug; the tail pipe rubber plug is fixed at the lower part of the inner side of the tail pipe connecting cylinder through a shear pin.
Preferably, the shear pin is provided with a blocking head, and a compression ring is arranged between the rubber plugs of the tail pipe rubber plug and between the rubber plugs and the rubber plug body and used for compressing the rubber plugs.
Preferably, the inner side of the upper end of the central tube is provided with a drill rod thread and the outer side is provided with a concave step for connecting a drilling tool on site.
Preferably, sealing rings are respectively arranged between the upper part and the lower part of the ejector rod hole at the inner side of the tail pipe connecting cylinder and the outer side of the central pipe, between the upper part and the lower part of the connecting hole at the inner side of the central pipe and the outer side of the ball seat, between the outer side of the ejector rod and the inner side of the ejector rod hole, and between the inner side of the pin hole and the outer side of the plugging head.
Another object of the present invention is to provide a method for feeding a reverse-free rotary tail pipe, comprising the steps of:
s1, connecting a reverse-buckle-free rotary tail pipe conveying tool on a well string, lowering the well string to a bottom hole position and performing drilling fluid circulation operation;
s2, throwing a hand ball after the circulation operation is completed, and after the hand ball falls to the position of the ball seat, holding the pipe string to ensure that the upper section and the lower section of the ball seat form pressure difference and shearing off the shearing pin of the ball seat;
s3, the hand ball and the ball seat move downwards simultaneously and fall into the rubber plug seat, and then the tail pipe is sent in through lifting the central pipe at the wellhead.
Preferably, in the running-in process, the tail pipe can be driven to rotate or carry out circulating operation at any time through the rotation of the rotary table under special conditions.
The beneficial effects of the invention are as follows:
the invention provides a reverse-buckle-free rotary tail pipe feeding tool and a reverse-buckle-free rotary tail pipe feeding method, which can safely and smoothly realize the casing running of a tail pipe, ensure the smooth running of the well cementation operation of the tail pipe, throw balls at a wellhead to put the tail pipe into a well bottom after the tail pipe is in series, ensure that the rotary tail pipe can be fed smoothly without reverse buckling, and realize the reliable method; meanwhile, the simple structural design is easy to process, and the production and manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic view in semi-section of a front view of an embodiment of the present invention;
fig. 2 is a schematic diagram showing a semi-sectional front view of a structure after a ball-casting holding ball seat shear pin is sheared according to an embodiment of the present invention;
FIG. 3 is a schematic view in half section of a front view after release in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged detail view of the connection ball apparatus of FIG. 1;
FIG. 5 is an enlarged detail view of the connection ball apparatus of FIG. 3;
FIG. 6 is an enlarged detail view of the lower portion of the tailpipe connection barrel;
1-center tube, 2-tail tube connecting cylinder, 3-ejector rod, 4-connecting ball, 5-ball seat shear pin, 6-ball seat, 7-plug, 8-shear pin, 9-spring, 10-plug body, 11-plug, 12-plug skeleton, 13-compression ring, 14-fixing screw, 15-plug seat, 16-hand-throwing ball and 17-connecting ball base.
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 detailed description is presented by way of example only and is not intended to limit the invention.
The drawings referred to in the embodiments are all semi-sectional views, the upper half is a sectional view, and the lower half is an external view.
Example 1
The embodiment provides a back-off-free rotary tail pipe feeding tool, which consists of a central pipe, a tail pipe connecting cylinder, a push rod, a connecting ball base, a ball seat pin; 6 ejector rod holes are uniformly distributed on the circumference of the middle lower part of the tail pipe connecting cylinder, and 4 pin holes are uniformly distributed on the circumference of the lower part of the tail pipe connecting cylinder; 6 connecting holes are uniformly distributed on the circumference of the lower end of the central tube; the tail pipe connecting cylinder is fixedly connected with the ejector rod through a connecting ball by utilizing the ejector rod hole and a connecting hole on the central pipe; the ball seat is installed through shearing the pin in the center tube inboard and the position that corresponds of connecting ball, contain a connecting ball base that holds the connecting ball between connecting ball and the ball seat, in the first state, as shown in fig. 1, the ball seat corresponds with the connecting ball position, in the second state, as shown in fig. 2, after the ball of giving up drops into, hold down through the well head, form pressure differential between the upper and lower section of ball seat, and this pressure differential cuts the round pin with the ball seat and is interrupted, make the ball of losing hands and ball seat move down together, fall to in the plug seat, the connecting ball does not have the load point this moment, move towards the center tube inboard, the effort between connecting ball and the ejector pin disappears, carry the center tube through the well head and realize the operation of giving up, as shown in fig. 3.
The back-off-free rotary tail pipe feeding tool provided in the embodiment further comprises a shearing pin, a rubber plug body, a rubber plug framework and a rubber plug seat, wherein the rubber plug body is connected with the rubber plug seat through threads, and the rubber plug body is sleeved with the rubber plug and is pressed and fixed through the rubber plug seat to form an integral tail pipe rubber plug as shown in fig. 6; the tail pipe rubber plug is fixed at the lower part of the inner side of the tail pipe connecting cylinder through a shear pin. And a blocking head is arranged on the shearing pin, and a compression ring is arranged between the rubber plugs of the tail pipe rubber plug and between the rubber plugs and the rubber plug body and used for compressing the rubber plugs.
In this embodiment, a drill rod thread is machined on the inner side of the upper end of the central tube, a concave step is machined on the outer side of the central tube, and the upper part and the lower part of the ejector rod hole on the inner side of the tail tube connecting tube are respectively provided with sealing rings with the outer side of the central tube, the upper part and the lower part of the connecting hole on the inner side of the central tube, the outer side of the ejector rod, the inner side of the ejector rod hole, the inner side of the pin hole and the outer side of the plugging head.
In addition, the rubber plug body is connected with the rubber plug seat through threads, and the rubber plug body is sleeved with the rubber plug and is pressed and fixed through the rubber plug seat to form an integral tail pipe rubber plug; the tail pipe rubber plug is fixed at the lower part of the inner side of the tail pipe connecting cylinder through a shear pin.
Example 2
This embodiment provides a use operation for running a liner into a well downhole using the back-off free rotary liner running tool of embodiment 1, comprising the steps of:
the tool described in the embodiment 1 is connected to the well string, and is lowered to the bottom position according to the design requirement, in the process of lowering, if the complicated conditions such as blocking and clamping are met, the tail pipe can be driven to rotate or carry out circulating operation at any time through the rotation of the turntable, and when the tail pipe string is smoothly lowered to the bottom position, drilling fluid circulating operation is carried out; after the circulation operation is completed, putting the hand-throwing ball into the wellhead, and after the hand-throwing ball falls to the position of the ball seat, holding the pressure of the pipe string, so that the upper section and the lower section of the ball seat form pressure difference to shear the ball seat, the hand-throwing ball and the ball seat move downwards and fall into the rubber plug seat as shown in figure 2, and then lifting the central pipe through the wellhead to realize the hand-throwing operation as shown in figure 3; after releasing operation is smooth, inserting the central tube back into the tail tube connecting cylinder, performing cementing operation, releasing a drill rod rubber plug at a wellhead after cementing is finished, completing slurry replacement operation, bumping operation, lifting the central tube again after bumping, flushing a bell mouth operation on the tail tube connecting cylinder when the central tube is lifted to a position 2-5m outside the tail tube connecting cylinder, lifting a drilling tool, and lifting the central tube out of the wellhead; and (5) completing cementing operation of the tail pipe.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention provides a reverse-buckle-free rotary tail pipe feeding tool and a reverse-buckle-free rotary tail pipe feeding method, which can safely and smoothly realize the casing running of a tail pipe, ensure the smooth running of the well cementation operation of the tail pipe, throw balls at a wellhead to put the tail pipe into a well bottom after the tail pipe is in series, ensure that the rotary tail pipe can be fed smoothly without reverse buckling, and realize the reliable method; meanwhile, the simple structural design is easy to process, and the production and manufacturing cost is reduced.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (4)
1. The method is characterized in that the method is realized by adopting a back-off-free rotary tail pipe conveying tool, wherein the tool comprises a central pipe and a tail pipe connecting cylinder, and the tail pipe connecting cylinder is nested on the central pipe through a connecting ball device;
the connecting ball device comprises a push rod arranged on the tail pipe connecting cylinder, a connecting ball and a ball seat arranged in the central pipe,
in a first state, the tee is mounted inside the base pipe by means of a tee pin; the connecting ball is arranged between the ball seat and the ejector rod;
in a second state, the ball seat and the ram are moved away from the connection ball;
the tail pipe connecting cylinder comprises a shearing pin, a rubber plug body, a rubber plug framework and a rubber plug seat, wherein the rubber plug body is connected with the rubber plug seat through threads, and the rubber plug body is sleeved with the rubber plug and is pressed and fixed through the rubber plug seat to form an integral tail pipe rubber plug; the tail pipe rubber plug is fixed at the lower part of the inner side of the tail pipe connecting cylinder through a shear pin;
a blocking head is arranged on the shear pin, and a compression ring is arranged between the rubber plugs of the tail pipe rubber plugs and between the rubber plugs and the rubber plug body and used for compressing the rubber plugs; the ejector rod is fixed through an ejector rod hole, the ball seat pin is fixed through a pin hole, and the connecting ball is arranged in the connecting hole;
the number of the ejector rod holes and the number of the connecting holes are 6;
the feeding method specifically comprises the following steps:
s1, connecting a reverse-buckle-free rotary tail pipe conveying tool on a well string, lowering the well string to a bottom hole position and performing drilling fluid circulation operation;
s2, throwing a hand ball after the circulation operation is completed, and after the hand ball falls to the position of the ball seat, holding the pipe string to ensure that the upper section and the lower section of the ball seat form pressure difference and shearing off the shearing pin of the ball seat;
s3, the hand ball and the ball seat move downwards simultaneously and fall into the rubber plug seat, and then the tail pipe is sent in through lifting the central pipe at the wellhead.
2. The method of claim 1, wherein the drill pipe thread is formed on the inner side of the upper end of the central pipe and a recessed step is formed on the outer side of the upper end of the central pipe for connecting a drilling tool on site.
3. The method of claim 1, wherein sealing rings are respectively installed between the upper and lower parts of the ejector pin hole on the inner side of the tail pipe connecting cylinder and the outer side of the central pipe, between the upper and lower parts of the connecting hole on the inner side of the central pipe and the outer side of the ball seat, between the outer side of the ejector pin and the inner side of the ejector pin hole, and between the inner side of the pin hole and the outer side of the plugging head.
4. The method of claim 1, wherein the tailpipe is rotated or cycled by rotating the turntable whenever a special situation occurs during the running process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811432631.5A CN109236220B (en) | 2018-11-28 | 2018-11-28 | Back-off-free rotary tail pipe running tool and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811432631.5A CN109236220B (en) | 2018-11-28 | 2018-11-28 | Back-off-free rotary tail pipe running tool and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109236220A CN109236220A (en) | 2019-01-18 |
| CN109236220B true CN109236220B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811432631.5A Active CN109236220B (en) | 2018-11-28 | 2018-11-28 | Back-off-free rotary tail pipe running tool and method |
Country Status (1)
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|---|---|
| CN (1) | CN109236220B (en) |
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2018
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| CN109236220A (en) | 2019-01-18 |
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