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A construction method for horizontally oriented underground pipelines to cross complex pebble and gravel formations

A technology for horizontal orientation and underground pipelines, applied in directional drilling, drilling equipment and methods, earthwork drilling and mining, etc., can solve the problems of inability to evaluate the relative distribution of pebble strata, detect pebble and gravel strata, and reduce encountering high-density pebbles Formation and other issues

Active Publication Date: 2022-08-02
河北省水利工程局集团有限公司
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Problems solved by technology

[0004] However, the construction method in this invention patent has the problem that the pebble formation cannot be detected during the construction process.
This invention patent cannot evaluate the relative distribution of pebble formations, so it cannot reduce the occurrence of high-density pebble formations, and at the same time, it cannot monitor the crack expansion and hole collapse accidents during the drilling process in real time

Method used

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  • A construction method for horizontally oriented underground pipelines to cross complex pebble and gravel formations
  • A construction method for horizontally oriented underground pipelines to cross complex pebble and gravel formations
  • A construction method for horizontally oriented underground pipelines to cross complex pebble and gravel formations

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Embodiment

[0027] Example: as attached figure 1 , 2 , 3, 4, 5 and appendix Image 6 As shown in the figure, a construction method for an underground pipeline to cross a complex pebble and gravel formation in a horizontal direction is characterized in that the following steps are included in sequence:

[0028] S1. To plan the pipeline trajectory, it is necessary to explore the pebble and gravel strata through the high-density electrical method and the drilling exploration method, and adjust the pipeline trajectory to reduce the probability of encountering the pebble and gravel stratum;

[0029] S2. Drilling with a drilling rig requires assembling a drill pipe of a suitable length, installing a suitable type of drill bit, drilling the hole according to the pipeline trajectory, and discharging the mud during the drilling process;

[0030] S3. The reamer pulls back and reams the hole, that is, the multi-stage pull-back and reaming method is adopted to obtain a hole with a sufficient apertu...

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Abstract

The invention belongs to the technical field of horizontal directional drilling, and in particular relates to a construction method for horizontally directional traversing complex pebble gravel formations for underground pipelines. The present invention achieves the effect of effectively laying underground pipelines in complex gravel formations by first planning the pipeline trajectory, then drilling holes by the drilling machine, then pulling back and reaming the holes by the reamer, and finally pulling the pipelines back and laying them. Drill pipe coupling for drilling operations in pebble and gravel formations with higher strength requirements. The invention has the advantages of avoiding the cobblestone formation to the greatest extent during the pipeline laying process, realizing effective drilling by increasing the drilling strength when encountering the cobblestone formation, and simple and effective operations of pulling back and expanding the hole and discharging the mud. Advantages, and the drill pipe coupling used in it has a strong connection structure, the two sections of drill pipe are not easy to loosen and slip, the coupling structure is easy to assemble and disassemble, and it is finally suitable for high-strength drilling in pebble and gravel formations. advantage.

Description

technical field [0001] The invention belongs to the technical field of horizontal directional drilling, and in particular relates to a construction method for horizontally directional traversing complex pebble gravel formations for underground pipelines. Background technique [0002] Horizontal directional crossing, also known as horizontal directional drilling technology, refers to an underground pipeline laying technology that does not require excavation of the ground. The operation steps mainly include site selection, drilling, and paving. Among them, when selecting the site, it is necessary to explore and avoid the pebble and gravel formations that are difficult to drill, and at the same time, it is necessary to do a good job in risk control and assessment during the drilling and drilling process. First of all, before the drilling construction, it is necessary to carry out the survey of the relative density of the pebble layer distribution in the construction area, so as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/04E21B7/26E21B7/28E21B49/00F16L1/028F16L1/06
CPCE21B7/046E21B7/26E21B7/28E21B49/00F16L1/028F16L1/06
Inventor 刘忠良董智杰胡宝文马建国闫婷婷张利锋曹永刚靳中磊范光明张美英焦秀丽邢彦波张海涛冯艳钦张行杜腾吴辉赵永飞李豪哲尹凤刚
Owner 河北省水利工程局集团有限公司
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