A pipeline worm mating type pipeline back dragging method

Abstract

The application discloses a pipeline worm cooperation type pipeline back dragging method, which comprises the following steps: a, construction of a guide hole, including a guide entry hole, a guide hole channel and a guide exit hole, and hole cleaning work; b, preparation of a back dragging pipeline on the ground, and preparation of a pipeline worm, connection of the pipeline worm and the back dragging pipeline through a buckle, connection of a reamer and a drill rod at the other end of the pipeline worm; the drill rod, the reamer, the pipeline worm and the back dragging pipeline enter the guide entry hole, and then the drill rod pulls the reamer, the pipeline worm and the back dragging pipeline to conduct pipeline back dragging in the guide hole channel. The pipeline worm cooperation type back dragging can reduce anticorrosive layer damage, ensure smooth pipeline entry into a hole, reduce construction risks such as drill tool fracture, and can play a lever role to avoid pipe clamping caused by a non-smooth hole curve, improve one-time back dragging success rate, indirectly protect an ecological environment, shorten a construction period and reduce engineering cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline back dragging, in particular to a pipeline worm cooperation type pipeline back dragging method. BACKGROUND

[0002] Horizontal directional drilling crossing technology has the characteristics of short construction period, low construction cost, no damage to green land and vegetation, etc., so it has been widely used in pipeline laying construction of coal gas, natural gas, electricity, oil, etc. However, large-diameter directional drilling crossing technology is not mature, and the construction risk is still very large, especially in the main pipe back dragging stage, due to the large starting pulling force, the large weight of the pipe, and the angle between the drill and the pipe, which may cause the back dragging pipe to be difficult to enter the hole, thereby causing problems such as damage to the anticorrosion layer and fracture of the drill. SUMMARY

[0003] The purpose of the present application is to provide a pipeline worm structure to cooperate with pipeline back dragging to improve the success rate of main pipe back dragging.

[0004] To achieve the above purpose, the pipeline worm cooperation type pipeline back dragging method adopts the following technical scheme:

[0005] A pipeline worm cooperation type pipeline back dragging method, comprising the following steps,

[0006] a, construction and construction of guide hole, including guide hole, guide hole, guide hole, and hole cleaning work;

[0007] b, prepare the back dragging pipe on the ground, and make the pipeline worm, connect the pipeline worm and the back dragging pipe through the buckle, connect the reamer and the drill pipe at the other end of the pipeline worm;

[0008] c, the drill pipe, reamer, pipeline worm and back dragging pipe enter the guide hole, then the drill pipe pulls the reamer, pipeline worm and back dragging pipe in the guide hole for pipeline back dragging.

[0009] The further improvement of the pipeline worm cooperation type pipeline back dragging method is that the pipeline worm comprises a fixed pipe, the two ends of the fixed pipe are respectively provided with connecting parts, the two connecting parts are respectively connected with the back dragging pipe and the reamer through the buckle, the fixed pipe is a straight seam pipe, connecting holes are arranged on both sides of the weld of the straight seam pipe along the length direction of the fixed pipe, support plates are fixedly connected on the inside and outside of the weld, two groups of second support plates are further arranged on the inner wall of the fixed pipe, the two groups of second support plates and the support plates on the inside of the weld are arranged in a triangular shape, and a plurality of reinforcing ribs are arranged between the two groups of second support plates and the support plates, and the reinforcing ribs are provided with mounting parts for mounting counterweights.

[0010] A further improvement of the pipe worm-assisted pipe pullback method of the present invention is that the connecting part is tapered, the small end face of the connecting part is provided with a pin hole, the large end face of the connecting part is connected to the fixed pipe by bolts, and a sealing gasket is provided between the connecting part and the fixed pipe.

[0011] A further improvement of the pipe worm-assisted pipe pullback method of the present invention is that a ring plate is provided at the guide inlet, the outer wall of the ring plate is fitted and fixedly connected to the guide inlet, and a buffer part is provided on the inner wall of the ring plate, the buffer part abutting against the pullback pipe.

[0012] A further improvement of the pipe worm-assisted pipe pullback method of the present invention is that an arc-shaped plate is also provided below the ring plate, and the arc-shaped plate is connected to the ring plate through a telescopic component.

[0013] A further improvement of the pipe worm-assisted pipe pullback method of the present invention is that the length of the fixed pipe is 5-7m, and the outer diameter of the fixed pipe is less than or equal to the outer diameter of the pullback pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The invention's "pipe worm" design, combined with pullback, can reduce damage to the anti-corrosion layer, ensure smooth pipe entry into the hole, and reduce construction risks such as drill bit breakage. At the same time, the "pipe worm" can act as a lever to avoid pipe jamming caused by uneven hole curves, improve the success rate of pullback on the first attempt, indirectly protect the ecological environment, shorten the construction period, and reduce project costs. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0017] Fig. 2 This is a schematic diagram of the structure of the guide hole in this invention;

[0018] Fig. 3 This is a schematic diagram of the cross-sectional structure of the pipe worm of the present invention.

[0019] In the diagram: 1. Guide manhole, 2. Pullback pipe, 3. Pipe worm, 4. Diverter, 5. Reamer, 6. Drill rod, 7. Shackle, 8. Fixing pipe, 9. Connecting part, 10. Support plate, 11. Second support plate, 12. Reinforcing rib, 13. Ring plate, 14. Buffer part, 15. Telescopic component. Detailed Implementation

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0021] As shown in the drawings, Figs. 1 to 3 a, a construction guide hole, including a guide entry hole 1, a guide hole channel, a guide exit hole, and hole cleaning work;

[0022] a, a construction guide hole, including a guide entry hole 1, a guide hole channel, a guide exit hole, and hole cleaning work;

[0023] b, the ground is prepared for the pipe 2, and the pipe worm 3 is made, the pipe worm is connected with the pipe through the buckle 7, the other end of the pipe worm is connected with the reamer and the drill rod;

[0024] c, the drill rod, the reamer, the pipe worm, and the pipe enter the guide entry hole, and then the drill rod pulls the reamer, the pipe worm, and the pipe in the guide hole channel to pipe back.

[0025] Specifically, the pipe worm includes a fixed pipe 8, and the two ends of the fixed pipe are respectively provided with connecting parts 9, the two connecting parts are respectively connected with the pipe 2 and the reamer 5 through the buckle, and a distribution device 4 is further arranged between the connecting part and the reamer. The fixed pipe is a straight seam pipe, the two sides of the weld of the straight seam pipe are provided with connecting holes which are uniformly arranged along the length direction of the fixed pipe, the inside and outside of the weld are fixedly connected with support plates 10, and two groups of second support plates 11 are further arranged on the inner wall of the fixed pipe. The two groups of second support plates are triangularly arranged with the support plates on the inside of the weld, and a plurality of reinforcing ribs 12 are arranged between the two groups of second support plates and the support plates, and the reinforcing ribs are provided with mounting parts for mounting counterweight blocks. The arrangement of the support plates further ensures the quality of the pipe worm, and the reinforcing ribs prevent deformation. At the same time, the counterweight blocks can be adjusted to adjust the pulling force of the pipe during entry into the hole, and the pipe is facilitated to enter the hole.

[0026] Further, the connecting part is conical, the small end face of the connecting part is provided with a pin hole, the large end face of the connecting part is connected with the fixed pipe through bolts, and a sealing gasket is arranged between the connecting part and the fixed pipe. The pipe worm can be disassembled, which ensures convenient installation.

[0027] Further, a ring plate 13 is arranged at the guide entry hole, the outer wall of the ring plate is attached to and fixedly connected with the guide entry hole, a buffer part 14 is arranged on the inner wall of the ring plate, and the buffer part is in abutment with the back pulling pipeline. The buffer part prevents the soil layer from abrading the back pulling pipeline wall when entering the hole. An arc-shaped plate is further arranged below the ring plate, and the arc-shaped plate is connected with the ring plate through an elastic member 15. The elastic member is used to adjust the incident angle of the back pulling pipeline, reduce the stress, and protect the back pulling pipeline.

[0028] Further, the fixed tube has a length of 5-7 m, and the outer diameter of the fixed tube is less than or equal to the outer diameter of the back pulling pipeline.

[0029] Overall, in the back pulling process, the "pipeline worm" can play a role of a lever, avoid the problem of pipe jamming caused by a non-smooth curve of the hole, improve the back pulling efficiency, ensure smooth back pulling, and guarantee normal back pulling speed of about 100 m / h. In the traditional back pulling process, the torque and tension are unstable when passing through a non-smooth curve hole, the back pulling speed is slowed down to about 50 m / h, and the use of the "pipeline worm" can stabilize the torque and tension and guarantee the normal back pulling speed of about 100 m / h. The lever action can reduce the friction on the anticorrosive layer when the back pulling pipeline enters the hole and passes through a non-smooth curve part, effectively protecting the anticorrosive layer.

[0030] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A pipe worm-assisted pipe pullback method, characterized in that: Includes the following steps, a. Constructing the pilot hole, including the pilot inlet hole, pilot channel, and pilot outlet hole, and cleaning the hole; b. Prepare the pullback pipe on the ground and make the pipe worm. Connect the pipe worm to the pullback pipe with a shackle. Connect the reamer and drill rod to the other end of the pipe worm. c. The drill pipe, reamer, pipe worm, and pullback pipe enter the guide hole. Then, the drill pipe pulls the reamer, pipe worm, and pullback pipe back in the guide hole. The pipe worm includes a fixed pipe with connecting parts at both ends. The two connecting parts are connected to the pullback pipe and the reamer respectively via shackles. The fixed pipe is a straight seam pipe. Connecting holes are evenly distributed along the length of the fixed pipe on both sides of the weld. Support plates are fixedly connected to the inner and outer sides of the weld. Two sets of second support plates are also provided on the inner wall of the fixed pipe. The two sets of second support plates are arranged in a triangle with the support plate on the inner side of the weld. Several reinforcing ribs are provided between the two sets of second support plates and the support plates. The reinforcing ribs are provided with mounting parts for installing counterweights.

2. The pipe worm-assisted pipe pullback method according to claim 1, characterized in that: The connecting part is tapered, with a pin hole on the small end face of the connecting part, and the large end face of the connecting part is connected to the fixed pipe by bolts. A sealing gasket is provided between the connecting part and the fixed pipe.

3. The pipe worm-assisted pipe pullback method according to claim 1, characterized in that: A ring plate is provided at the guide inlet, the outer wall of the ring plate is fitted and fixedly connected to the guide inlet, and a buffer part is provided on the inner wall of the ring plate, which abuts against the pullback pipe.

4. The pipe worm-assisted pipe pullback method according to claim 3, characterized in that: An arc-shaped plate is also provided below the ring plate, and the arc-shaped plate is connected to the ring plate through a telescopic component.

5. The pipe worm-assisted pipe pullback method according to claim 1, characterized in that: The length of the fixed pipe is 5-7m, and the outer diameter of the fixed pipe is less than or equal to the outer diameter of the pullback pipe.

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