Ramming equipment and ramming construction technology for reducing wall resistance of rammed pipes

A technology of pipe wall resistance and construction technology, which is used in mechanical equipment, pipeline laying and maintenance, pipes/pipe joints/fittings, etc., which can solve the problem that the front end of the casing is difficult to obtain propulsion energy, the utilization efficiency of ramming force is low, and the pipe body is effective. Low energy and other problems, to achieve the effect of reducing the performance of the tamper and the transition dependence of the pipe material, reducing equipment consumption and the cost of pipe purchase, and reducing the coefficient of friction
CN111577975BActive Publication Date: 2021-12-03SICHUAN GASOLINEEUM CONSTR ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN GASOLINEEUM CONSTR ENG
Publication Date
2021-12-03

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Abstract

The invention provides a ramming device for reducing the resistance of the ramming pipe wall and its crossing ramming process. The ramming device for reducing the resistance of the ramming pipe wall includes a cutting ring, a steel casing, and a grouting drag-reducing component , Rammer body and track, wherein, the track is fixedly arranged on the ground for the steel casing to ram into the stratum to be cut along a predetermined direction on the track; the cutting ring is fixedly arranged at the front end of the steel casing, and the cutting ring is not connected with the One end of the steel casing connection is provided with a groove for cutting the soil, and the diameter of the cutting ring is larger than that of the steel casing so that an annular space is formed between the steel casing wall and the cut formation; the rammer and the steel casing The other end is connected to the other end of the steel casing and can exert a ramming force on the steel casing; the grouting drag-reducing component is arranged in the annulus on the outer wall of the steel casing and can pump mud into the annulus to reduce the contact between the outer wall of the steel casing and the Frictional resistance between cutting formations. The invention has the advantages of being able to greatly reduce the resistance during the pipe ramming process, reduce the loss of ramming force, and the like.
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Description

technical field

[0001] The invention relates to the technical field of shale reservoir development, in particular to a ramming device and a ramming construction process for reducing the wall resistance of a rammed pipe. Background technique

[0002] Pipe ramming is a technique in which pipe ramming hammers are used to directly ram the steel pipe to be laid into the ground along the designed route to realize trenchless pipe laying. The working principle is that the large impact force generated by the rammer under the drive of compressed air directly acts on the rear end of the steel pipe, and the steel pipe as a whole overcomes the friction force and shear force between the soil layer and the pipe body, and is forced to cut into the soil. In the crossing construction, it is a practical and effective direct pipe-laying process. At the same time, it can also play an important role in providing protection for ground structures, isolating pebble layers to assist hole formation, a...

Claims

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