A spiral self-supporting drill pipe fishing device and a control method thereof

Abstract

The present invention belongs to the field of drilling technology, and discloses a spiral self-supporting drill pipe salvage device and a control method thereof, a male cone, a spiral steel claw fixing device and a spiral steel claw; the bottom of the male cone is provided with a turnbuckle in the same direction as the male cone, and the spiral steel claw is sleeved on the outside of the male cone; the spiral steel claw fixing device is provided on the outside of the upper end of the male cone, and the male cone and the spiral steel claw are connected together by the turnbuckle and the spiral steel claw fixing device. The tap and the spiral steel claw of the present invention are connected together by the turnbuckle and the spiral steel claw fixing device, which effectively reduces the risk of the spiral steel claw falling off during the process of salvaging the drill pipe; the inner side of the spiral steel claw has a blade angle, which facilitates the spiral steel claw to descend into the borehole, and reduces the resistance when lifting the drill pipe, and the bottom is flat and has an outer blade angle, which is conducive to the spiral steel claw to efficiently grab the dropped or broken drill pipe and straighten it.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling, and in particular relates to a spiral self-supporting drill rod salvage device. Background Art

[0002] At present, geological drilling refers to a geological project that uses certain drilling machinery and technology to obtain rock and mineral cores below the surface to make reliable evaluations of geological and mineral resource parameters. In-hole accidents occur in the borehole due to natural causes or improper design, management, construction, and operation, and the normal drilling is interrupted by falling objects, broken drill rods, drill bits being released, stuck drill bits, and burned drill bits. In particular, the treatment of broken drill rods is very difficult and requires a lot of manpower and material resources.

[0003] The existing method for dealing with broken drill pipes is to use a male cone to salvage the broken drill pipes section by section. However, it is very difficult to salvage the drill pipes when the situation in the hole is complicated and the dropped or broken drill pipes are tightly attached to the hole wall, especially in horizontal holes and inclined holes, where the dropped or broken drill pipes are in close contact with the lower hole wall.

[0004] In order to solve the problem of salvaging broken drill rods in complex drilling conditions, especially horizontal and inclined holes, a spiral self-supporting drill rod salvage device is proposed.

[0005] Through the above analysis, the problems and defects of the prior art are as follows:

[0006] The existing broken drill pipe salvage method is very difficult for the situation in the hole to be complicated, and the dropped or broken drill pipe is tightly attached to the hole wall, especially in horizontal holes and inclined holes, where the dropped or broken drill pipe is in close contact with the lower hole wall.

[0007] The difficulty of solving the above problems and defects is as follows: Traditional salvage directly uses drill pipe to connect male cone or female cone to enter the borehole for salvage. Because the dropped or broken drill pipe is tightly against the borehole wall, the male cone or female cone cannot be quickly connected to the drill pipe joint. In most cases, the male cone will be offset from the dropped drill pipe, causing the male cone to constantly rub against the hole wall at the position where the drill pipe is broken, so that the borehole diameter here is enlarged, and the salvage work is even more difficult. For horizontal holes and inclined holes, the probability of quickly connecting the salvage male cone or female cone with the broken drill pipe joint is very low, and drill pipe salvage is very difficult. The possibility of a waste hole is very high.

[0008] The significance of solving the above problems and defects is: greatly increasing the probability of successfully handling drill rod drop accidents, reducing the probability of waste holes due to drill rod drop accidents, effectively reducing the time for handling accidents, thereby effectively ensuring the progress of survey work, providing effective drilling data in a timely manner, and avoiding losses caused by waste holes due to drill rod drop accidents. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides a spiral self-supporting drill pipe salvage device.

[0010] The present invention is implemented as follows: a spiral self-supporting formal drill pipe salvage device comprises: a male cone, a spiral steel claw fixing device and a spiral steel claw;

[0011] The bottom of the male cone is provided with a turnbuckle in the same direction as the male cone, and the spiral steel claw is sleeved on the outside of the male cone;

[0012] The spiral steel claw fixing device is arranged on the outer side of the upper end of the male cone, and the male cone and the spiral steel claw are connected together through a turnbuckle and the spiral steel claw fixing device.

[0013] Furthermore, a threaded opening is provided at the upper end of the male cone, and the upper end of the threaded opening is connected to the connecting head of the salvage drill pipe.

[0014] Furthermore, the spiral direction of the male cone is consistent with the direction of the spiral steel claw.

[0015] Furthermore, the spiral steel claw has a cutting edge on the inner side, and the bottom is flat and has an outer cutting edge.

[0016] Furthermore, the diameter of the upper end of the spiral steel claw is the same as that of the salvage drill pipe, the diameter of the lower end of the spiral steel claw is larger than the diameter of the upper end, and the diameter of the lower end of the spiral steel claw is the same as the diameter of the drill hole.

[0017] Another object of the present invention is to provide a control method for a spiral self-supporting drill pipe salvage device, the control method for the spiral self-supporting drill pipe salvage device comprising:

[0018] The threaded opening at the upper end of the male cone is connected to the salvage drill pipe, and the power generated by the drilling rig is transmitted to the male cone through the salvage drill pipe;

[0019] The male cone and the spiral steel claw fixing device drive the spiral steel claw to rotate. When rotating, it can catch the drill rod lying on the hole wall in any direction and use the gradually reduced inner diameter to straighten the fallen or broken drill rod;

[0020] After the spiral steel claws straighten the drill pipe, the male cone is aimed at the dropped or broken drill pipe. The inner side of the spiral steel claws has a cutting edge, which can cut the occasional slag in the drill hole, reduce the rising resistance, and realize the function of salvaging the drill pipe.

[0021] In combination with all the above-mentioned technical solutions, the advantages and positive effects of the present invention are: quickly and effectively salvaging the drill rod that has fallen or broken into the borehole and is tightly attached to the hole wall, especially salvaging the drill rod that has fallen or broken into a horizontal hole or an inclined hole and is tightly attached to the lower side hole wall.

[0022] The tap and the spiral steel claw of the present invention are connected together by a turnbuckle and a spiral steel claw fixing device, which effectively reduces the risk of the spiral steel claw falling off during the process of fishing the drill pipe.

[0023] The inner side of the spiral steel claw of the present invention has a cutting edge, which facilitates the spiral steel claw to descend into the borehole and reduces the resistance when lifting the drill rod. The bottom is flat and has an outer cutting edge, which is conducive to the spiral steel claw to efficiently grab the dropped or broken drill rod and straighten it.

[0024] The invention is suitable for use in inclined holes, horizontal holes, and situations where a drill rod falls or breaks off in a hole and is not centered in the hole.

[0025] The directions of the tap and the spiral steel claw thread of the present invention can be selected according to needs, and can be clockwise or counterclockwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The present invention is a schematic structural diagram of a spiral self-supporting drill pipe salvage device provided in an embodiment of the present invention.

[0028] Figure 2 It is a schematic structural diagram of a male cone provided in an embodiment of the present invention.

[0029] In the figure: 1. male cone; 2. spiral steel claw fixing device; 3. spiral steel claw; 4. salvaging drill pipe; 5. hole wall; 6. dropped or broken drill pipe; 7. drilling. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] In view of the problems existing in the prior art, the present invention provides a spiral self-supporting drill pipe salvage device, which is described in detail below in conjunction with the accompanying drawings.

[0032] like Figure 1 to Figure 2 As shown, the spiral self-supporting formal drill pipe salvage device provided in the embodiment of the present invention includes a male cone 1, a spiral steel claw fixing device 2 and a spiral steel claw 3.

[0033] The male cone 1 is connected to the spiral steel claw 3 by the spiral steel claw fixing device 2. The minimum diameter of the spiral steel claw 3 is the diameter of the drill pipe joint, the lower part is the spiral steel claw, and the maximum diameter is the borehole diameter. The spiral steel claw 3 has a cutting edge on the inside, and the bottom is flat and has an outer cutting edge. The upper end of the male cone 1 has a threaded opening on the outside, which can be connected to the salvage drill pipe 4 joint.

[0034] The upper part of the invention is a connector of a common drill pipe, which is connected to the salvage drill pipe through a thread, and the bottom part is flat and has an outer edge angle for easy grasping.

[0035] When the present invention is in use, the threaded opening at the upper end of the male cone 1 is connected with the salvage drill rod 4 and the drilling rig, and the power generated by the drilling rig is transmitted to the device through the salvage drill rod. During use, the salvage drill rod is used to transport the device to the position where the drill rod falls or breaks, and the machine is started to rotate the device. When the drill rod rotates, the drill rod that falls on the hole wall in any direction can be grasped and the drill rod can be straightened by using the gradually reduced inner diameter. After the spiral steel claw 3 straightens the drill rod, the male cone 1 can be aligned with the fallen or broken drill rod. The inner side of the spiral steel claw has a blade angle, which has a cutting effect on the occasional slag in the hole, reduces the rising resistance, and thus realizes the function of salvaging the drill rod. The device is suitable for inclined holes, horizontal holes, and the situation where the drill rod falls or breaks in the hole and is not centered in the hole.

[0036] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A control method for a spiral self-supporting drill pipe salvage device, characterized in that: The control method of the spiral self-supporting drill pipe salvage device comprises: The threaded opening at the upper end of the male cone is connected to the salvage drill pipe, and the power generated by the drilling rig is transmitted to the male cone through the salvage drill pipe; The male cone and the spiral steel claw fixing device drive the spiral steel claw to rotate. When rotating, it can catch the drill rod lying on the hole wall in any direction and use the gradually reduced inner diameter to straighten the fallen or broken drill rod; After the spiral steel claws straighten the drill pipe, the male cone is aimed at the dropped or broken drill pipe. The inner side of the spiral steel claws has a cutting edge, which can cut the occasional slag in the borehole, reduce the rising resistance, and realize the salvage of the drill pipe. The spiral self-supporting formal drill pipe salvage device used therein comprises: a male cone, a spiral steel claw fixing device and a spiral steel claw; The bottom of the male cone is provided with a turnbuckle in the same direction as the male cone, and the spiral steel claw is sleeved on the outside of the male cone; The spiral steel claw fixing device is arranged on the outer side of the upper end of the male cone, and the male cone and the spiral steel claw are connected together by a turnbuckle and the spiral steel claw fixing device; The upper end of the male cone is provided with a threaded opening, and the upper end of the threaded opening is connected to the connector of the salvage drill pipe; The spiral direction of the male cone is consistent with the direction of the spiral steel claw; The spiral steel claw has a cutting edge on the inner side, and the bottom is flat and has an outer cutting edge; The diameter of the upper end of the spiral steel claw is the same as that of the salvage drill pipe, the diameter of the lower end of the spiral steel claw is larger than the diameter of the upper end, and the diameter of the lower end of the spiral steel claw is the same as the diameter of the drill hole.

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