Reverse circulation deslagging device for drilling machine

Abstract

A reverse circulation gooseneck pipe is connected with a gooseneck pipe support power head through a flange, a wear-resisting plate is arranged on the outer side of the neck portion of the reverse circulation gooseneck pipe, the two ends of a movable head are connected with the reverse circulation gooseneck pipe and a slag discharging pipe through unions, and the slag discharging pipe is hung on a semicircular hanging support after being connected through the unions. The semicircular suspension bracket is suspended below the triangular cantilever bracket through a pin shaft, and the triangular cantilever bracket is fixed on a drilling rig twisting point; the triangular cantilever support comprises a pull rod and an L-shaped cantilever, the two ends of the pull rod are fixed to the L-shaped cantilever and a drill stand hinge point respectively through pin shafts, and the pull rod, the L-shaped cantilever and the drill stand form a triangular structure. The deslagging pipe of the deslagging device is hung on the right side of the drilling rig, so that a machinist can conveniently observe the slag returning condition in real time, and the operation is convenient; meanwhile, the movable head is additionally arranged between the reverse circulation gooseneck pipe and the deslagging pipe, so that the torque borne by the deslagging pipe is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of drilling rigs, in particular to a reverse circulation slag discharge device for drilling rigs. Background Art

[0002] As the drilling depth continues to increase, the underground conditions become more complex and changeable, so the requirements for drilling technology in deep well construction are becoming more and more diverse. At present, domestic drilling technology mainly adopts mud positive circulation and air positive circulation. Downhole drilling tools are driven by high-pressure air or high-pressure mud, which is input into the bottom of the well through the hollow inside the drill pipe to drive the downhole drilling tools to cut, grind or impact and crush the formation. The generated rock cuttings are returned to the ground through the gap between the drill pipe and the hole wall. The slag removal process of the reverse circulation system is opposite to the positive circulation. The air enters the double-wall drill pipe through the air box, enters the downhole drilling tool through the inner tube of the double-arm drill pipe and the inner wall channel of the drill pipe for impact and grinding, and the generated rock cuttings are returned to the ground slag removal system through the hollow channel of the inner tube of the double-wall drill pipe. The advantage of the reverse circulation system is that the slag return channel becomes smaller and is not limited by the size of the aperture. Therefore, reverse circulation is widely used in large-aperture construction or deep well construction projects.

[0003] In the current reverse circulation system, the slag discharge pipe is mostly connected to the return slag pipe by the main shaft of the power head and thrown to the ground, or the positive circulation channel is used instead of the reverse circulation. This type of slag discharge system is not only inconvenient to use and affects the operator's line of sight, but also during the slag discharge process, the return slag particles of different sizes enter the slag discharge channel and cause serious wear on the slag discharge channel, which greatly increases the construction risk, while significantly reducing the service life of the drilling rig and increasing the construction cost.

[0004] Therefore, it is necessary to develop a new type of reverse circulation slag discharge device for drilling rigs to facilitate operation and extend service life. Utility Model Content

[0005] Purpose of the utility model: In view of the shortcomings and defects of the prior art, the utility model provides a reverse circulation slag discharge device for a drilling rig. The slag discharge pipe of the slag discharge device is suspended on the right side of the drill frame, which is convenient for the operator to observe the slag return situation in real time and facilitate operation. At the same time, a movable head is added between the reverse circulation gooseneck pipe and the slag discharge pipe to eliminate the torque on the slag discharge pipe and extend its service life.

[0006] Technical solution: The utility model is a reverse circulation slag discharge device for a drilling rig, characterized in that it includes a reverse circulation gooseneck, a gooseneck bracket, a movable head, a slag discharge pipe, a semicircular suspension bracket and a triangular cantilever bracket. The reverse circulation gooseneck is connected to the power head of the gooseneck bracket through a flange. A wear-resistant plate is arranged on the outer side of the neck of the reverse circulation gooseneck. Both ends of the movable head are connected to the reverse circulation gooseneck and the slag discharge pipe through a union. The slag discharge pipe is suspended on the semicircular suspension bracket after being connected through the union. The semicircular suspension bracket is suspended under the triangular cantilever bracket through a pin shaft. The triangular cantilever bracket is fixed on the drilling rig hinge point. The triangular cantilever bracket includes a pull rod and an L-shaped cantilever. Both ends of the pull rod are respectively fixed to the L-shaped cantilever and the drilling rig hinge point through a pin shaft. The pull rod, the L-shaped cantilever and the drilling rig form a triangular structure.

[0007] Wherein, the reverse circulation gooseneck pipe is provided with a wear-resistant plate at the neck and a rib plate at the connection between the flange and the pipe body.

[0008] The bolt hole of the reverse circulation gooseneck flange is offset by 20° from the vehicle body. When installed, the gooseneck is offset by 20° to the right from the vehicle body.

[0009] Wherein, a movable head is provided between the reverse circulation gooseneck pipe and the slag discharge pipe.

[0010] The slag discharge pipes are connected by unions and then fixed on a semicircular suspension bracket by U-shaped bolts and extend downward.

[0011] The slag discharge pipe is wound with double-layer steel wire, and an anti-fall pipe clamp and a steel wire rope are arranged at the end of the slag discharge pipe.

[0012] Wherein, the semicircular suspension bracket is provided with three groups of adjustable pin holes.

[0013] Beneficial effects: Compared with the prior art, the utility model has the following significant advantages: the utility model not only adds wear-resistant plates at the wear-prone parts of the gooseneck pipe, thereby increasing the wear resistance of the gooseneck pipe, but also adds a movable head between the reverse circulation gooseneck pipe and the slag discharge pipe, which can rotate during the lifting or lowering of the power head, thereby reducing the torque on the gooseneck pipe and extending the service life of the gooseneck pipe; this reverse circulation slag discharge device hangs the slag discharge pipe on the right side of the drilling rig, which is convenient for the operator to observe the slag discharge situation in real time, and adjust the drilling rig footage and drilling pressure and other parameters in time according to the slag return effect, thereby effectively reducing the construction risk.

[0014] The reverse circulation gooseneck pipe of the utility model is provided with a wear-resistant plate on the neck and a rib plate at the connection between the flange and the pipe body. When the reverse circulation device discharges slag, it will be eroded and worn by particles of different sizes. The wear-resistant plate can effectively increase the service life of the gooseneck pipe. At the same time, when the wear-resistant plate is eroded and worn, the wear-resistant plate can be replaced, thereby reducing the frequency of overall replacement of the gooseneck pipe.

[0015] The utility model provides a movable head between the reverse circulation gooseneck pipe and the slag discharge pipe. When the power head is lifted or lowered, the movable head can rotate freely, thereby reducing the torsion applied to the slag discharge pipe and the reverse circulation gooseneck pipe and reducing the risk of the slag discharge pipe being torsionally broken. Both ends of the movable head are connected by a union. When assembling the movable head, it can be directly connected by only hammering, which is convenient for quick assembly and replacement.

[0016] The slag discharge pipe of the utility model is suspended on the right side of the vehicle body through a triangular cantilever bracket and a semicircular suspension bracket, which is convenient for the operator to observe the reverse circulation slag discharge effect in real time, so as to judge the feed speed and drilling pressure. The semicircular suspension bracket is suspended through three groups of suspension points under the L-shaped cantilever. The three groups of suspension points can arbitrarily adjust the front and rear distance of the slag discharge pipe, which is conducive to adapting to the suspension position requirements under different working conditions. The L-shaped cantilever is connected to the drill rig hinge point through a pull rod, and the hinge point connection method is based on the pin shaft connection, which is convenient for quick assembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the reverse circulation gooseneck pipe of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the movable head of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the slag discharge pipe of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the semicircular suspension bracket of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the triangular cantilever bracket of the utility model;

[0023] In the figure, 1 is a reverse circulation gooseneck; 101 is a wear-resistant plate; 2 is a gooseneck bracket; 3 is a movable head; 4 is a slag discharge pipe; 5 is a semicircular suspension bracket; 6 is a triangular cantilever bracket; 601 is a pull rod; 602 is an L-shaped cantilever; and 7 is an anti-fall pipe clamp. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The utility model provides a reverse circulation slag discharge device for a drilling rig, comprising a reverse circulation gooseneck 1, a gooseneck bracket 2, a movable head 3, a slag discharge pipe 4, a semicircular suspension bracket 5 and a triangular cantilever bracket 6. The reverse circulation gooseneck 1 is connected to the power head of the gooseneck bracket 2 through a flange. A wear-resistant plate 101 is provided on the outer side of the neck of the reverse circulation gooseneck 1 to extend the service life by strengthening the thickness of the neck. The two ends of the movable head 3 are connected to the reverse circulation gooseneck 1 and the slag discharge pipe 4 through a union. The two ends of the movable head 3 can rotate freely, reducing the torque generated when the power head is in motion and extending the service life of the slag discharge pipe 4 and the reverse circulation gooseneck 1. The slag discharge pipe 4 is suspended on the semicircular suspension bracket 5 after being connected through a union. The semicircular suspension bracket 5 is suspended under the triangular cantilever bracket 6 through a pin shaft, and the triangular cantilever bracket 6 is fixed on the drilling rig hinge point. The triangular cantilever bracket 6 includes a tie rod 601 and an L-shaped cantilever 602. The two ends of the tie rod 601 are respectively fixed to the L-shaped cantilever 602 and the drill rig hinge point through a pin shaft. The tie rod 601, the L-shaped cantilever 602 and the drill rig form a stable and reliable triangular structure. Among them, the reverse circulation gooseneck pipe 1 is provided with a wear-resistant plate 101 on the neck, and a rib plate is provided at the connection between the flange and the pipe body. The bolt hole of the flange plate of the reverse circulation gooseneck pipe 1 is offset by 20° from the vehicle body. When installed, the gooseneck pipe is offset to the right by 20° from the vehicle body. A movable head 3 is provided between the reverse circulation gooseneck pipe 1 and the slag discharge pipe 4. The slag discharge pipes 4 are connected by a union and fixed to the semicircular suspension bracket 5 by U-shaped bolts and extend downward. The slag discharge pipe 4 is wound with double-layer steel wire, and an anti-fall pipe clamp 7 and a steel wire rope are arranged at the end of the slag discharge pipe 4. The semicircular suspension bracket 5 is provided with three sets of adjustable pin shaft holes.

[0026] The utility model provides a wear-resistant plate on the neck of the reverse circulation gooseneck pipe, and a rib plate at the connection between the flange and the pipe body. When the reverse circulation device discharges slag, it will be eroded by particles of different sizes. When the neck of the reverse circulation gooseneck pipe is eroded and worn, the outer wear-resistant plate will take effect and can extend the service life of the entire gooseneck pipe. After the wear-resistant plate is worn, it can be replaced by removing the outer wear-resistant plate, thereby reducing the construction cost. The bolt hole of the flange plate of the reverse circulation gooseneck pipe is offset by 20° from the body. During installation, the gooseneck pipe is offset to the right side of the body by 20°. When drilling, the first section of the slag discharge pipe avoids interference with the drill rod and drilling tools from the front, thereby blocking the line of sight. An active head is added between the reverse circulation gooseneck pipe and the slag discharge pipe. When the power head is lifted or lowered, the two ends of the active head can rotate freely, thereby reducing the torque on the reverse circulation gooseneck pipe and the slag discharge pipe and increasing the service life. The slag discharge pipe is suspended on the right side of the drilling rig through a semicircular suspension bracket and a triangular cantilever bracket, thereby facilitating the operator to observe the slag return situation in real time.

[0027] The reverse circulation gooseneck pipe of the utility model is provided with a wear-resistant plate at the neck and a rib plate at the connection between the flange and the pipe body, and the service life of the gooseneck pipe is increased by strengthening the thickness of the neck. When the reverse circulation gooseneck pipe is eroded and worn by the return slag particles, the wear-resistant plate can effectively extend the service life of the reverse circulation gooseneck pipe. At the same time, when the wear-resistant plate is severely eroded and worn, the wear-resistant plate can be replaced, thereby reducing the frequency of replacing the gooseneck pipe as a whole.

[0028] The reverse circulation gooseneck pipe of the utility model is fixed to the power head through a flange and a gooseneck pipe bracket, and is connected to the movable head through a union. The movable head can rotate freely when the power head is raised or lowered, reducing the torque on the slag discharge pipe and the reverse circulation gooseneck pipe, thereby extending the service life of the slag discharge pipe and the reverse circulation gooseneck pipe and avoiding the situation where the inspection pipe is torsionally broken. Both ends of the movable head are union connection structures. When assembling the movable head, it only needs to be hammered to be directly connected, which is convenient for quick assembly and replacement.

[0029] The slag discharge pipe of the utility model is suspended on the right side of the vehicle body through a semicircular suspension bracket and a triangular cantilever bracket, which is beneficial for the operator to observe the slag discharge effect in real time and correctly judge the parameters such as feed speed and drilling pressure. The slag discharge pipes are connected by a union, fixed to the semicircular suspension bracket by a U-bolt and thrown to the ground.

[0030] The semicircular suspension bracket of the utility model is suspended under the triangular cantilever bracket through two sets of pins, and the triangular cantilever bracket is fixed on the drilling rig hinge point to provide a support point for the slag discharge pipe suspension. The triangular cantilever bracket is composed of a pull rod and an L-shaped cantilever, and the two ends of the pull rod are respectively fixed on the drilling rig hinge point and the L-shaped cantilever hinge point through pins. The semicircular suspension bracket is suspended under the L-shaped cantilever through three sets of suspension points. The three sets of suspension points can arbitrarily adjust the front and rear distance of the slag discharge pipe, which is convenient for adapting to the suspension position requirements under different working conditions.

Claims

1. A reverse circulation slag removal device for a drilling rig, characterized in that: The invention comprises a reverse circulation gooseneck pipe (1), a gooseneck pipe bracket (2), a movable head (3), a slag discharge pipe (4), a semicircular suspension bracket (5) and a triangular cantilever bracket (6); the reverse circulation gooseneck pipe (1) is connected to the power head of the gooseneck pipe bracket (2) through a flange; a wear-resistant plate (101) is arranged on the outer side of the neck of the reverse circulation gooseneck pipe (1); both ends of the movable head (3) are connected to the reverse circulation gooseneck pipe (1) and the slag discharge pipe (4) through a union; the slag discharge pipe (4) is connected to the reverse circulation gooseneck pipe (1) and the slag discharge pipe (4) through a union. The rear part is suspended on a semicircular suspension bracket (5), and the semicircular suspension bracket (5) is suspended under a triangular cantilever bracket (6) through a pin shaft, and the triangular cantilever bracket (6) is fixed on the drilling rig hinge point; the triangular cantilever bracket (6) includes a pull rod (601) and an L-shaped cantilever (602), and the two ends of the pull rod (601) are respectively fixed on the L-shaped cantilever (602) and the drilling rig hinge point through a pin shaft, and the pull rod (601), the L-shaped cantilever (602) and the drilling rig form a triangular structure.

2. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: The reverse circulation gooseneck pipe (1) is provided with a wear-resistant plate (101) at the neck and a rib plate at the connection between the flange and the pipe body.

3. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: The bolt hole of the flange of the reverse circulation gooseneck pipe (1) is offset by 20° from the vehicle body. When installed, the gooseneck pipe is offset by 20° to the right side of the vehicle body.

4. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: A movable head (3) is provided between the reverse circulation gooseneck pipe (1) and the slag discharge pipe (4).

5. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: The slag discharge pipes (4) are connected by unions and then fixed on the semicircular suspension bracket (5) by U-shaped bolts and extend downward.

6. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: The slag discharge pipe (4) is wound with double-layer steel wires, and an anti-fall pipe clamp (7) and a steel wire rope are arranged at the end of the slag discharge pipe (4).

7. The reverse circulation slag removal device for drilling rig according to claim 1, characterized in that: The semicircular suspension bracket (5) is provided with three groups of adjustable pin holes.

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