CN113445937B - Butt joint construction method for large-diameter drilling inner sleeve - Google Patents
Butt joint construction method for large-diameter drilling inner sleeve Download PDFInfo
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- CN113445937B CN113445937B CN202110777609.XA CN202110777609A CN113445937B CN 113445937 B CN113445937 B CN 113445937B CN 202110777609 A CN202110777609 A CN 202110777609A CN 113445937 B CN113445937 B CN 113445937B
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- casing
- lower casing
- well
- lifter
- butt joint
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- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 210000001503 joint Anatomy 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a large-caliber drilling inner sleeve butt joint construction method, which comprises the following steps of 1: the upper casing is lowered into the well from the wellhead of the well, and the lower casing is placed in a roadway below the well and is positioned right below the well; step 2: artificially connect the ware and connect the female member with lifting upward, go into the drilling rod to the tunnel in going into the sleeve pipe from the well head of drilling through going up to artificially connect the lower extreme and the ware that lifts of drilling rod: and step 3: lifting the drill rod upwards to lift the lifter and the lower casing into the well until the second conical screw thread at the upper end of the lower casing extends into the first conical screw thread at the lower end of the upper casing, and rotating the drill rod to drive the lifter and the lower casing to rotate so that the second conical screw thread at the upper end of the lower casing is in threaded connection with the first conical screw thread at the lower end of the upper casing; and 4, step 4: the drill pipe is continuously rotated to enable the lifting device to twist the connecting female element off the lower casing, and the drill pipe is continuously lifted to lift the lifting device and the connecting female element out of the well, so that the butt joint efficiency is high.
Description
Technical Field
The invention belongs to the field of large-caliber drilling and pipe laying operation construction, and particularly relates to a butt joint construction method for an inner sleeve of a large-caliber drilling well.
Background
In order to ensure the safe production of a mine and reduce the occurrence of gas accidents, gas must be prevented and controlled, and at present, a large amount of air is usually introduced into the mine through an air duct to dilute the gas, but the gas still has safety risks.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a construction method for realizing casing butt joint in a drilling well.
In order to achieve the purpose, the technical scheme of the invention is as follows: a butt joint construction method for large-caliber drilling inner sleeves comprises an upper sleeve, a lower sleeve and a lifter, wherein a first conical screw thread is coaxially arranged at the lower end of the upper sleeve, a second conical screw thread matched with the first conical screw thread is coaxially arranged at the upper end of the lower sleeve, a connecting female part is fixedly arranged in the lower sleeve, and the lifter can be connected with the connecting female part;
the method for butting the upper casing and the lower casing in the well comprises the following steps:
step 1: lowering the upper casing into the well bore from a wellhead of the well bore, placing the lower casing in a roadway below the well bore and directly below the well bore;
step 2: manually connecting the lifting device with the connecting female element, descending a drill rod from the wellhead of the well into the roadway through the upper casing, and manually connecting the lower end of the drill rod with the lifting device:
And step 3: lifting the drill pipe upwards to lift the lifter and the lower casing into the drill well until the second conical thread of the upper end of the lower casing extends into the first conical thread of the lower end of the upper casing, and rotating the drill pipe to drive the lifter and the lower casing to rotate, so that the second conical thread of the upper end of the lower casing is in threaded connection with the first conical thread of the lower end of the upper casing;
and 4, step 4: continuing to rotate the drill pipe to enable the lifting device to twist off the connecting female element from the lower casing pipe and continuing to lift the drill pipe to lift the lifting device and the connecting female element out of the well bore, or disconnecting the lifting device and the connecting female element and continuing to lift the drill pipe to lift the lifting device out of the well bore, namely enabling the upper casing pipe and the lower casing pipe (2) to be butted up in the well bore.
The beneficial effects of the above technical scheme are that: therefore, the upper lifter can be connected with the connecting female member of the lower casing, the drill rod drives the upper lifter and the lower casing to move upwards into the well drilling and be in butt joint with the lower end of the upper casing, then the connecting female member is separated from the lower casing so as to complete the butt joint of the upper casing and the lower casing, or the upper lifter is disconnected from the connecting female member, so that the butt joint of the upper casing and the lower casing is realized.
In the technical scheme, the outer diameter and the inner diameter of the upper casing and the lower casing are respectively consistent.
The beneficial effects of the above technical scheme are that: therefore, the upper sleeve and the lower sleeve are in same-diameter butt joint.
In the technical scheme, the inner diameters of the upper casing and the lower casing are 700-800 mm.
The beneficial effects of the above technical scheme are that: thus meeting the construction of large-caliber drilling.
In the above technical scheme, the lifter comprises a connecting rod and a connecting male piece, the connecting rod is vertically arranged, the lower end of the connecting rod is connected with the upper end of the connecting male piece, the connecting male piece can be connected with the connecting female piece, and the upper end of the connecting rod is used for being connected with the lower end of the drill rod.
The beneficial effects of the above technical scheme are that: the structure is simple.
In the technical scheme, the connecting female part is a second conical female screw thread, the larger end of the opening of the connecting female part is upward, the connecting female part is coaxially and fixedly installed in the lower sleeve, the connecting male part is connected with the second conical male screw thread matched with the connecting female part, the connecting rod is vertically arranged, the lower end of the connecting rod is fixedly connected with the middle part of the connecting male part, and the connecting male part can stretch into the connecting female part and is in threaded connection with the connecting female part and the connecting male part.
The beneficial effects of the above technical scheme are that: the connecting device is simple in structure, convenient to connect and capable of enabling the connecting female part and the lower sleeve to be separated conveniently.
In the technical scheme, the connecting female part is arranged inside the upper end of the lower sleeve.
The beneficial effects of the above technical scheme are that: therefore, the upper lifter and the lower casing can move more conveniently in the well, and the coaxiality of the upper lifter and the lower casing after the upper lifter and the lower casing are connected is better.
In the technical scheme, the outer diameter of the upper end of the connecting female piece is consistent with the inner diameter of the lower sleeve, and the upper end of the connecting female piece is fixedly connected with the inner wall of the lower sleeve or integrally formed.
The beneficial effects of the above technical scheme are that: this allows the coupling female member to be more easily separated from the lower casing.
Drawings
FIG. 1 is a view of the upper casing, lower casing and riser of the present invention in combination;
FIG. 2 is a schematic diagram of the butt joint of an upper casing and a lower casing in a borehole according to the present invention.
In the figure: 1, 11, 2, 21, 22, 31, 32, 4, 5 and 6 drill pipes.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 and fig. 2, the embodiment provides a large-caliber drilling inner casing butt joint construction method, which includes an upper casing 1, a lower casing 2 and an upper lifter 3, wherein a first tapered screw thread 11 is coaxially arranged at the lower end of the upper casing 1, a second tapered screw thread 21 matched with the first tapered screw thread 11 is coaxially arranged at the upper end of the lower casing 2, a connecting female part 22 is fixedly arranged inside the lower casing 2, and the upper lifter 3 can be connected with the connecting female part 22;
the method for butting the upper casing 1 and the lower casing 2 in the well 4 comprises the following steps:
step 1: lowering the upper casing 1 into the borehole 4 from the wellhead of the borehole 4, placing the lower casing 2 in a roadway 5 below the borehole 4 and directly below the borehole 4;
step 2: manually connecting the upper lifter 3 with the connection female 22, lowering a drill rod 6 from the wellhead of the well 4 through the upper casing 1 into the roadway 5, and manually connecting the lower end of the drill rod 6 with the upper lifter 3:
and step 3: lifting the drill pipe 6 upwards to lift the lifter 3 and the lower casing 2 into the well 4 until the second conical threads 21 at the upper end of the lower casing 2 extend into the first conical threads 11 at the lower end of the upper casing 1, and rotating the drill pipe 6 to rotate the lifter 3 and the lower casing 2 so that the second conical threads 21 at the upper end of the lower casing 2 are in threaded connection with the first conical threads 11 at the lower end of the upper casing 1;
And 4, step 4: continuing to rotate the drill pipe 6 to cause the lifter 3 to twist the coupling female member 22 off the lower casing 2 and continuing to lift the drill pipe 6 to lift the lifter 3 and the coupling female member 22 out of the well 4, or disconnecting the lifter 3 from the coupling female member 22 and continuing to lift the drill pipe 6 to lift the lifter 3 out of the well 4, i.e. to effect the upper casing 1 and the lower casing 2 to be docked in the well 4 such that the lifter can be connected to the coupling female member of the lower casing and the drill pipe can drive the upper and lower casings to move up into the well and to dock with the lower end of the upper casing, and then to cause the coupling female member to separate from the lower casing to effect the docking of the upper and lower casings, or to disconnect the lifter from the coupling female member to effect the docking of the upper and lower casings, the method is simple and easy to implement, and the butt joint efficiency is high.
The first tapered screw thread 11 is a first tapered female screw thread, the second tapered screw thread 21 is a first tapered male screw thread, or the first tapered screw thread is a first tapered male screw thread, and the second tapered screw thread is a first tapered female screw thread.
Taking a 500m deep well as an example, the length of the upper casing is 450-480m, and the length of the lower casing 2 is 20-50 m.
In the technical scheme, the outer diameter and the inner diameter of the upper casing 1 and the lower casing 2 are respectively consistent, so that the upper casing and the lower casing are in same-diameter butt joint.
In the technical scheme, the inner diameters of the upper casing 1 and the lower casing 2 are 700-800mm, so that the construction of large-caliber drilling is met.
In the above technical solution, the lifting device 3 includes a connecting rod 31 and a connecting male member 32, the connecting rod 31 is vertically disposed, the lower end of the connecting rod 31 is connected to the upper end of the connecting male member 32, the connecting male member 32 can be connected to the connecting female member 22, the upper end of the connecting rod 31 is used for being connected to the lower end of the drill rod 6, and the structure is simple.
In the technical scheme, the connection female part 22 is a second conical female screw thread, the larger end of the opening of the connection female part is upward, the connection female part is coaxially and fixedly installed in the lower casing 2, the connection male part 32 is connected with the second conical male screw thread matched with the connection female part 22, the connecting rod 31 is vertically arranged, the lower end of the connecting rod is fixedly connected with the middle of the connection male part 32, the connection male part 32 can stretch into the connection female part 22 and the connection female part are connected through threads, the structure is simple, the connection is convenient, and meanwhile, the connection female part and the lower casing are separated conveniently.
In this embodiment, after the first tapered thread on the upper casing and the second tapered thread on the lower casing are connected in a threaded manner in step 4, the lifting device and the female connection member in the lower casing have two separation methods, one method is to directly drive the lifting device to rotate by using the drill rod to twist down the female connection member from the lower casing (i.e. the female connection member is separated from the lower casing and is lifted out of the well synchronously with the lifting device), the specific principle is as follows, taking the drill rod to always rotate clockwise as an example, when the rotation direction of the drill rod is clockwise rotation, the male connection member rotates clockwise relative to the female connection member when the male connection member is twisted with the female connection member, and when the lower casing and the upper casing are twisted, the lower casing rotates clockwise relative to the upper casing, at this time, when the female connection member is finally twisted down from the lower casing, the drill rod is still rotated clockwise, at the moment, the lower sleeve and the upper sleeve are in threaded connection, the connecting male part and the connecting female part are also in threaded connection, and at the moment, the drill rod is continuously rotated clockwise, so that the rotating torque force of the drill rod is transmitted to the connecting female part through the connecting male part, a larger torque force is generated between the connecting female part and the lower sleeve, and finally the connecting female part and the lower sleeve are separated from each other; another method is to unscrew the coupling pin from the coupling box (at which point the coupling box remains on the lower casing and only the elevator is raised out of the well), wherein the drill pipe may first be rotated clockwise so that the coupling pin of the elevator is rotated clockwise relative to the coupling box and threadedly coupled with the coupling box, then the drill pipe may be raised and rotated counterclockwise so that the second conical thread on the upper end of the lower casing is rotated counterclockwise relative to the first conical thread on the lower end of the upper casing to threadedly couple the two, and then the drill pipe may be continued to be rotated counterclockwise so that the coupling pin of the elevator is unthreaded from the coupling box in the lower casing.
In the above technical solution, the connection female member 22 is installed inside the upper end of the lower casing 2, so that the movement of the upper lifter and the lower casing in the drilling well is more convenient, and the coaxiality of the upper lifter and the lower casing after connection is better.
In the above technical scheme, the outer diameter of the upper end of the connecting female part 22 is consistent with the inner diameter of the lower casing 2, and the upper end of the connecting female part 22 is fixedly connected with the inner wall of the lower casing 2 or integrally formed (but the connection between the connecting female part 22 and the lower casing cannot be too firm, so that the rotating force of the final drill rod cannot be used for screwing the connecting female part down from the lower casing after the lower casing is in butt joint with the upper casing), so that the connecting female part can be more easily separated from the lower casing.
Wherein the well bore is drilled while maintaining its vertical bore.
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 fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The butt joint construction method of the large-caliber drilling inner sleeves is characterized by comprising an upper sleeve (1), a lower sleeve (2) and an upper lifter (3), wherein a first conical screw thread (11) is coaxially arranged at the lower end of the upper sleeve (1), a second conical screw thread (21) matched with the first conical screw thread (11) is coaxially arranged at the upper end of the lower sleeve (2), a connecting female part (22) is fixedly arranged in the lower sleeve (2), and the upper lifter (3) can be connected with the connecting female part (22);
The method for butting the upper casing (1) and the lower casing (2) in the well (4) comprises the following steps:
step 1: -lowering the upper casing (1) from the mouth of the borehole (4) into the borehole (4), -placing the lower casing (2) in a roadway (5) below the borehole (4) and directly below the borehole (4);
step 2: manually connecting the upper lifter (3) with the connecting female member (22), descending a drill rod (6) from the wellhead of the drilling well (4) through the upper casing (1) into the roadway (5), and manually connecting the lower end of the drill rod (6) with the upper lifter (3):
and step 3: lifting the drill pipe (6) upwards to lift the lifter (3) and the lower casing (2) into the well (4) until the second conical thread (21) at the upper end of the lower casing (2) extends into the first conical thread (11) at the lower end of the upper casing (1), and rotating the drill pipe (6) to drive the lifter (3) and the lower casing (2) to rotate, so that the second conical thread (21) at the upper end of the lower casing (2) is in threaded connection with the first conical thread (11) at the lower end of the upper casing (1);
and 4, step 4: and continuing to rotate the drill pipe (6) to enable the lifting device (3) to twist the connecting female element (22) down from the lower casing pipe (2), continuing to lift the drill pipe (6) to lift the lifting device (3) and the connecting female element (22) out of the well (4), or disconnecting the lifting device (3) from the connecting female element (22), and continuing to lift the drill pipe (6) to lift the lifting device (3) out of the well (4), namely realizing the butt joint of the upper casing pipe (1) and the lower casing pipe (2) in the well (4).
2. The large-caliber drilling inner casing butt joint construction method according to claim 1, wherein the outer diameter and the inner diameter of the upper casing (1) and the lower casing (2) are respectively consistent.
3. The large-caliber drilling inner casing butting construction method according to claim 2, wherein the inner diameters of the upper casing (1) and the lower casing (2) are 700-800 mm.
4. The large-caliber drilling casing butt joint construction method according to any one of claims 1 to 3, wherein the lifter (3) comprises a connecting rod (31) and a connecting male piece (32), the connecting rod (31) is vertically arranged, the lower end of the connecting rod (31) is connected with the upper end of the connecting male piece (32), the connecting male piece (32) can be connected with the connecting female piece (22), and the upper end of the connecting rod (31) is used for being connected with the lower end of the drill rod (6).
5. The large-caliber drilling inner casing butt joint construction method according to claim 4, wherein the connecting female part (22) is a second conical female screw thread, the larger end of the connecting female part is upward and is coaxially and fixedly installed in the lower casing (2), the connecting male part (32) is a second conical male screw thread matched with the connecting female part (22), the connecting rod (31) is vertically arranged, the lower end of the connecting male part is fixedly connected with the middle part of the connecting male part (32), and the connecting male part (32) can extend into the connecting female part (22) and is in threaded connection with the connecting female part.
6. The large-caliber drilling casing butt joint construction method according to claim 5, wherein the connection female member (22) is installed inside the upper end of the lower casing (2).
7. The large-caliber drilling inner casing butt joint construction method according to claim 5, wherein the outer diameter of the upper end of the connecting female member (22) is consistent with the inner diameter of the lower casing (2), and the upper end of the connecting female member (22) is fixedly connected with or integrally formed with the inner wall of the lower casing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777609.XA CN113445937B (en) | 2021-07-09 | 2021-07-09 | Butt joint construction method for large-diameter drilling inner sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777609.XA CN113445937B (en) | 2021-07-09 | 2021-07-09 | Butt joint construction method for large-diameter drilling inner sleeve |
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| CN113445937A CN113445937A (en) | 2021-09-28 |
| CN113445937B true CN113445937B (en) | 2022-07-29 |
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