CN212130440U - Multistage forging and milling tool for underground casing - Google Patents
Multistage forging and milling tool for underground casing Download PDFInfo
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- CN212130440U CN212130440U CN202020704142.7U CN202020704142U CN212130440U CN 212130440 U CN212130440 U CN 212130440U CN 202020704142 U CN202020704142 U CN 202020704142U CN 212130440 U CN212130440 U CN 212130440U
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Abstract
The utility model discloses a multi-stage forging and milling tool for underground casing pipes, which belongs to the technical field of oil gas drilling and production tools and comprises an upper and a lower two-stage forging and milling components connected by a drill pipe buckle; the lower forging and milling component pushes a lower piston to move through pump pressure, so that a lower cutter plate extends out, and the sleeve is cut by utilizing the hard alloy teeth on the cutter plate; the upper-stage forging and milling component is used when the lower-stage forging and milling component loses the forging and milling capacity; the upper-level forging and milling component pushes the upper piston rod to move in a ball-throwing pressure-building mode, so that the upper cutter is pushed to extend out, and then the sleeve is forged and milled by utilizing the hard alloy teeth on the upper cutter. When the device is used, the times of tripping the drilling tool are saved, the forging and milling time is saved, the forging and milling length of the sleeve is prolonged, and the engineering requirement of one-time successful casing windowing can be met.
Description
Technical Field
The utility model relates to an oil gas exploitation device technical field, concretely relates to multistage forging and milling instrument of sleeve pipe in pit.
Background
In drilling, sidetracking or workover, the casing needs to be forged and milled. Chinese patent literature with publication number CN110374536A and publication date of 2019, 10 and 25 discloses a sleeve forging and milling tool, which comprises a cylinder, a flow limiting plug, a check ring, an overflowing ring, a hydraulic piston, a mandrel, a forging and milling blade and a limit ring; the flow limiting plug, the check ring, the overflowing ring, the hydraulic piston, the mandrel, the forging and milling blade and the limiting ring are sequentially arranged inside the cylinder body along the direction from the upper joint to the lower joint; the tool is lowered to a preset position, the turntable drives the tool to rotate, the slurry pump drives slurry to enter the tool, pressure is generated when the slurry flows through a nozzle on a hydraulic piston, the hydraulic piston moves downwards under the pushing of the pressure, a core shaft moves downwards to push a forging and milling blade to expand outwards, the forging and milling blade generates transverse force on the wall of a casing to cut the casing, after the casing is cut off, the forging and milling blade gradually expands outwards to reach a maximum limit position, at the moment, a drilling tool is lowered to apply drilling pressure to carry out casing forging and milling construction, after the construction is finished, the slurry pump is stopped firstly until the pressure drop disappears, the piston resets, the forging and milling blade is retracted into a cutter groove, then the turntable is stopped, and the drill.
After a conventional forging and milling tool (provided with 3 milling cutters which can be opened and closed and have both side edges and bottom edges) represented by the above patent document is lowered to a designed depth, a pump is started to circulate and gradually increase the pressure, and the tool is opened in the pressure increasing process. The initial working condition is spot milling with the side edges of the blades abutting the casing. Through rotary cutting, the casing wall is continuously thinned until the casing is milled and penetrated, at the moment, the fixed point milling process is finished, and the drilling tool is placed downwards to be pressed, milled and milled. And the bottom edge of the blade cuts the sleeve during the pressurized milling. Along with the continuous lowering of the drilling tool, the length of the ground casing pipe is continuously increased until the forging and milling length meeting the design requirement is reached. The conventional forging and milling tool has the advantages of simple tool for lowering the well, simple and convenient operation, suitability for various casing sizes, low cost of the tool for lowering the well and no obstruction of the forging and milling part of the casing to the subsequent drilling and well completion operation. The defects are that the operation time is long, the cutting amount of the casing is large, and the effect on high-strength casings, deep wells and high-temperature wells is poor. Therefore, in order to improve the forging and milling quality, reduce the number of trip times, reduce the operation cost, and succeed in one-time forging and milling after running, a new type of underground casing forging and milling tool needs to be researched.
Disclosure of Invention
The utility model discloses aim at defect and not enough to above-mentioned prior art existence, provide a multistage milling tool that forges of sleeve pipe in pit, adopt the utility model discloses, can save the drilling tool number of times of running down, practice thrift and forge the milling time, simultaneously, owing to lengthened the sleeve pipe and forged the length of milling, can satisfy the once successful engineering requirement of sleeve pipe windowing.
The utility model discloses a realize through adopting following technical scheme:
the utility model provides a multistage forging and milling instrument of well casing which characterized in that: the forging and milling device comprises an upper forging and milling component and a lower forging and milling component, wherein the upper forging and milling component and the lower forging and milling component are connected by a drill rod buckle;
the lower-stage forging and milling component comprises a lower sealing ring, a lower piston, a lower spring, a lower body, a lower cutting board limiting block, a lower screw, hard alloy teeth and a lower limiting end; the lower sealing ring, the lower piston, the lower spring and the lower limiting end are all located in the lower body, a cavity for mounting the lower spring is formed between the step of the upper piston and the step in the lower body, the lower spring is sleeved on the lower piston, one end of the lower spring is fixed on the step of the lower body, the other section of the lower spring is fixed on the lower piston, the lower limiting end which is formed by gradually reducing the inner diameter and used for limiting the movable stroke of the lower piston is arranged in the lower body, the lower body close to the lower limiting end is provided with the lower cutting board, the lower cutting board protrudes out of the outer wall of the lower body due to the movement of the lower piston, the lower cutting board is fixed in the direction through a lower screw, the lower body is provided with the lower cutting board limiting block for limiting the protruding position of the lower cutting board, and hard alloy teeth are embedded in the working end face of the;
the upper-level forging and milling component comprises an upper piston, an upper spring, an upper body, an upper cutting board, an upper sealing ring, an upper cutting board limiting block, an upper screw, an upper limiting end and a ball; go up piston, upper spring and last spacing end and all be located go up this internal, form the cavity of installing the spring between the step of going up the piston and the step of last body, and go up the spring housing and locate on the piston, the one end of going up the spring is fixed on the step of last body, and another section is fixed on last piston, and the inside of going up the body is provided with the internal diameter and reduces gradually and form and be used for restricting the piston stroke of going up go up the spacing end, is provided with on being close to the last body of last spacing end go up the cutting board, go up the piston motion and make go up the cutting board protrusion in go up the body outer wall, go up the cutting board and pass through last screw fixed direction, and go up and be provided with on the body and limit the protruding position of cutting board go up the cutting board stopper, it has the carbide tooth to inlay at the working end face of last cutting board, and the ball sets up in the ball.
At least one stage of forging and milling component is arranged between the upper stage of forging and milling component and the lower stage of forging and milling component, the specific structure of the added at least one stage of forging and milling component is the same as that of the lower stage of forging and milling component, and any two stages of forging and milling components are connected through a drill rod buckle.
Compared with the prior art, the utility model discloses the beneficial effect who reaches as follows:
1. the utility model discloses a set up upper and lower two-stage and forge the multistage forging and milling instrument that mills the component formation, will save the drilling tool number of times of getting up down, practice thrift and forge the milling time, simultaneously, owing to lengthened the sleeve pipe and forged the length of milling, can satisfy the sleeve pipe and open a window the engineering requirement of once succeeding.
2. The utility model discloses, at least one-level is forged and is milled the component still to be provided with between the upper and lower two-stage forging and milling component, can adapt to the concrete requirement of different operating modes according to the forging ability of cutting board.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
FIG. 1 is a schematic structural view of the present invention during drilling;
FIG. 2 is a schematic view of the outer shape of FIG. 1;
FIG. 3 is a schematic structural view of the forging and milling operation of the lower blade of the present invention;
FIG. 4 is a schematic view of the outer shape of FIG. 3;
FIG. 5 is a schematic structural view of the upper blade forging and milling operation of the present invention;
fig. 6 is a schematic view of the external shape of fig. 5.
The labels in the figure are:
1. an upper piston; 2. an upper spring; 3. an upper body; 4. an upper blade; 5. a lower seal ring; 6. a lower piston; 7. a lower spring; 8. an upper sealing ring; 9. an upper knife board limiting block; 10. a drill rod connecting buckle; 11. a lower body; 12. a lower knife board; 13. a lower blade limiting block; 14. screwing; 15. a lower screw; 16. hard alloy teeth; 17. an upper limiting end; 18. a lower limiting end; 19. a ball.
Detailed Description
Example 1
As a preferred embodiment of the utility model, the utility model discloses a multistage forging and milling tool for underground casing pipes, which comprises an upper forging and milling component and a lower forging and milling component, wherein the upper forging and milling component and the lower forging and milling component are connected by a drill pipe buckle; the lower forging and milling component comprises a lower sealing ring 5, a lower piston 6, a lower spring 7, a lower body 11, a lower cutter plate 12, a lower cutter plate limiting block 13, a lower screw 15, hard alloy teeth 16 and a lower limiting end 18; the lower sealing ring 5, the lower piston 6, the lower spring 7 and the lower limit end 18 are all positioned in the lower body 11, a cavity for mounting the lower spring 7 is formed between the step of the upper piston 1 and the step in the lower body 11, the lower spring 7 is sleeved on the lower piston 6, one end of the lower spring 7 is fixed on the step of the lower body 11, the other section is fixed on the lower piston 6, the lower limiting end 18 which is formed by gradually reducing the inner diameter and is used for limiting the movable stroke of the lower piston 6 is arranged in the lower body 11, the lower body 11 which is close to the lower limiting end 18 is provided with the lower knife board 12, the lower piston 6 moves to enable the lower knife board 12 to protrude out of the outer wall of the lower body 11, the direction of the lower knife board 12 is fixed through a lower screw 15, the lower handle is provided with a lower cutting board limiting block 13 for limiting the protruding position of the lower cutting board 12, and hard alloy teeth 16 are embedded in the working end face of the lower cutting board 12; the upper-stage forging and milling component comprises an upper piston 1, an upper spring 2, an upper body 3, an upper cutting board, an upper sealing ring 8, an upper cutting board limiting block 9, an upper screw 14, an upper limiting end 17 and a ball 19; the upper piston 1, the upper spring 2 and the upper limiting end 17 are all positioned in the upper body 3, a cavity for mounting the upper spring 2 is formed between the step of the upper piston 1 and the step in the upper body 3, the upper spring 2 is sleeved on the upper piston 1, one end of the upper spring 2 is fixed on the step of the upper body 3, the other section is fixed on the upper piston 1, the upper body 3 is internally provided with an upper limit end 17 which is formed by gradually reducing the inner diameter and is used for limiting the movable stroke of the upper piston 1, the upper body 3 close to the upper limit end 17 is provided with the upper knife board, the upper piston 1 moves to enable the upper knife board to protrude out of the outer wall of the upper body 3, the upper knife board is fixed in the direction through an upper screw 14, and the upper body is provided with an upper knife board limit block 9 which limits the protruding position of the upper knife board, the working end surface of the upper knife plate is embedded with hard alloy teeth 16, and a ball 19 is arranged in a ball 19 seat of the upper body 3 and used for pushing the upper piston 1 to move.
The lower forging and milling component pushes the lower piston 6 to move through pump pressure, so that the lower cutting plate 12 extends out, and the sleeve is cut by utilizing the hard alloy teeth 16 on the cutting plate; the upper-stage forging and milling component is used when the lower-stage forging and milling component loses the forging and milling capacity; the upper-stage forging and milling component pushes the upper piston 1 to move in a pressure-holding mode through a ball-throwing 19, so that the upper cutter is pushed to extend out, and then the sleeve is forged and milled by utilizing the hard alloy teeth 16 on the upper cutter. The utility model discloses when using, will save the drilling tool number of times of having played down, practiced thrift and forged the milling time, the length that the extension sleeve pipe forged and milled can satisfy the sleeve pipe engineering requirement of once succeeding of windowing.
Example 2
As another preferred embodiment of the present invention, on the basis of embodiment 1, at least one stage of forging and milling member is further disposed between the upper and lower two-stage forging and milling members, the specific structure of the increased at least one stage of forging and milling member is the same as that of the lower stage of forging and milling member, and any two stages of forging and milling members are connected by a drill rod buckle.
Example 3
As a specific application example of the utility model, the embodiment discloses a downhole working principle of downhole multi-stage forging and milling tool for lower cutter plate forging and milling, which comprises that upper and lower two-stage forging and milling components are connected by a drill rod buckle 10 on the ground and are put into a designated position in a well; the lower forging and milling component firstly works, fluid is pumped from the ground, the fluid flows through the lower piston 6 rod, the pumping pressure of the wellhead is increased due to the narrowing of a fluid channel, the lower piston 6 moves downwards, and the lower cutting board 12 is forced to extend out; the lower piston 6 is limited by a lower limiting end 18 to prevent excessive movement; the lower cutting board 12 is limited by a lower cutting board limiting block 13, so that the lower cutting board 12 is prevented from extending excessively; the lower cutting board 12 is fixed in direction by a lower screw 15; a plurality of hard alloy teeth 16 are embedded in the end face of the lower cutting board 12; when the lower piston 6 moves downwards, the lower spring 7 is pressed; and when the ground pump pressure stops, the lower spring 7 pushes the lower piston 6 to move upwards, so that the lower cutter plate 12 is restored to the state before entering the well.
Example 4
As another specific application example of the present invention, the present embodiment discloses a downhole working principle of the forging and milling operation of the upper blade of the downhole casing multistage forging and milling tool, which includes stopping the pump and lowering the tool to a designated position when the lower blade 12 loses the forging and milling capability; the upper-stage forging and milling component starts to work, a ball 19 is put into the drill rod at the wellhead, the pump is started, the ball 19 enters the ball seat, and the upper piston 1 is pushed to move; the movement of the upper piston 1 is limited by an upper limiting end 17; a gap is formed between the upper piston 1 and the upper body 3, and fluid flows into a lower-stage forging and milling component through the gap; the size of the gap determines whether the lower-stage forging and milling component enters a working state; the upper knife board 4 is limited by an upper knife board limiting block 9, so that the upper knife board 4 is prevented from being excessively extended; the upper cutting board 4 is fixed in direction by an upper screw 14; a plurality of hard alloy teeth 16 are embedded in the upper knife plate 4; the carbide teeth 16 cut with the casing.
Claims (2)
1. The utility model provides a multistage forging and milling instrument of well casing which characterized in that: the forging and milling device comprises an upper forging and milling component and a lower forging and milling component, wherein the upper forging and milling component and the lower forging and milling component are connected by a drill rod buckle;
the lower-stage forging and milling component comprises a lower sealing ring (5), a lower piston (6), a lower spring (7), a lower body (11), a lower cutter plate (12), a lower cutter plate limiting block (13), a lower screw (15), hard alloy teeth (16) and a lower limiting end (18); the lower sealing ring (5), the lower piston (6), the lower spring (7) and the lower limit end (18) are all located in the lower body (11), a cavity for installing the lower spring (7) is formed between the step of the upper piston (1) and the step in the lower body (11), the lower spring (7) is sleeved on the lower piston (6), one end of the lower spring (7) is fixed on the step of the lower body (11), the other section of the lower spring is fixed on the lower piston (6), the lower limit end (18) which is formed by gradually reducing the inner diameter and is used for limiting the movable stroke of the lower piston (6) is arranged in the lower body (11), the lower body (11) close to the lower limit end (18) is provided with the lower knife board (12), the lower knife board (12) protrudes out of the outer wall of the lower body (11) by the movement of the lower piston (6), and the lower knife board (12) is fixed in the direction through the lower screw (15), the lower handle is provided with a lower cutting board limiting block (13) for limiting the protruding position of the lower cutting board (12), and hard alloy teeth (16) are embedded in the working end surface of the lower cutting board (12);
the upper-stage forging and milling component comprises an upper piston (1), an upper spring (2), an upper body (3), an upper cutter plate, an upper sealing ring (8), an upper cutter plate limiting block (9), an upper screw (14), an upper limiting end (17) and a ball (19); the upper piston (1), the upper spring (2) and the upper limit end (17) are all located in the upper body (3), a cavity for installing the upper spring (2) is formed between the step of the upper piston (1) and the step in the upper body (3), the upper spring (2) is sleeved on the upper piston (1), one end of the upper spring (2) is fixed on the step of the upper body (3), the other section of the upper spring is fixed on the upper piston (1), the inner diameter of the upper body (3) is gradually reduced to form the upper limit end (17) which is used for limiting the movable stroke of the upper piston (1), the upper body (3) close to the upper limit end (17) is provided with the upper cutter plate, the upper cutter plate protrudes out of the outer wall of the upper body (3) due to the movement of the upper piston (1), the upper cutter plate is fixed in direction through an upper screw (14), and the upper body (3) is provided with the upper limit block (9) which limits the protruding position of the upper cutter plate, the working end surface of the upper cutting board is embedded with hard alloy teeth (16), and the ball (19) is arranged in a ball (19) seat of the upper body (3) and used for pushing the upper piston (1) to move.
2. The downhole multi-stage forge milling tool of claim 1, wherein: at least one stage of forging and milling component is arranged between the upper stage of forging and milling component and the lower stage of forging and milling component, the specific structure of the added at least one stage of forging and milling component is the same as that of the lower stage of forging and milling component, and any two stages of forging and milling components are connected through a drill rod buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020704142.7U CN212130440U (en) | 2020-04-30 | 2020-04-30 | Multistage forging and milling tool for underground casing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020704142.7U CN212130440U (en) | 2020-04-30 | 2020-04-30 | Multistage forging and milling tool for underground casing |
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| CN212130440U true CN212130440U (en) | 2020-12-11 |
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| CN202020704142.7U Active CN212130440U (en) | 2020-04-30 | 2020-04-30 | Multistage forging and milling tool for underground casing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780207A (en) * | 2021-01-04 | 2021-05-11 | 中国石油天然气集团有限公司 | Cutting board assembly of oil and gas well casing cutting and forging milling system |
| CN112780206A (en) * | 2021-01-04 | 2021-05-11 | 中国石油天然气集团有限公司 | Casing cutting, forging and milling tool for old well and abandoned well operation |
| CN116927700A (en) * | 2023-08-23 | 2023-10-24 | 西南石油大学 | Efficient two-stage casing section milling tool and casing section milling cutter |
| CN116927700B (en) * | 2023-08-23 | 2024-04-19 | 西南石油大学 | Efficient two-stage casing section milling tool and casing section milling cutter |
-
2020
- 2020-04-30 CN CN202020704142.7U patent/CN212130440U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780207A (en) * | 2021-01-04 | 2021-05-11 | 中国石油天然气集团有限公司 | Cutting board assembly of oil and gas well casing cutting and forging milling system |
| CN112780206A (en) * | 2021-01-04 | 2021-05-11 | 中国石油天然气集团有限公司 | Casing cutting, forging and milling tool for old well and abandoned well operation |
| CN116927700A (en) * | 2023-08-23 | 2023-10-24 | 西南石油大学 | Efficient two-stage casing section milling tool and casing section milling cutter |
| CN116927700B (en) * | 2023-08-23 | 2024-04-19 | 西南石油大学 | Efficient two-stage casing section milling tool and casing section milling cutter |
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