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Percussive-rotary drilling method and system for horizontal directional drilling crossing

A technology of horizontal directional drilling and drilling rigs, applied in directional drilling, drilling equipment and methods, drilling equipment, etc., can solve the problems of low drilling pressure, reduce secondary wear, shorten construction period, and improve drilling efficiency

Inactive Publication Date: 2015-07-08
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a method and system for horizontal directional drilling through impact rotary drilling, which is applied in the process of horizontal directional drilling through pilot holes in hard rock formations, and combines two new drilling methods of impact rock breaking and rotary cutting , through high-frequency impact to make rock cracks expand, solve the problem of low drilling pressure at the end of the drill bit, and improve the efficiency of rotary cutting

Method used

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  • Percussive-rotary drilling method and system for horizontal directional drilling crossing
  • Percussive-rotary drilling method and system for horizontal directional drilling crossing
  • Percussive-rotary drilling method and system for horizontal directional drilling crossing

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Embodiment 1

[0044] This embodiment provides a horizontal directional drilling percussion rotary drilling method, which is suitable for horizontal directional drilling pilot hole crossing projects in hard rock formations, such as Figure 1~3 As shown, the method includes:

[0045] Step S101: Arranging the horizontal directional drilling machine 1 to a preset position on one side of the rock mass to be traversed.

[0046] In the specific implementation process, after entering the construction site, according to the design crossing curve depth and the parameter information of the specific conditions on both sides of the rock mass to be crossed, determine the distance from the horizontal directional drilling rig 1 to the rock mass to be crossed, based on the horizontal directional drilling rig 1 to the distance from the rock mass to be crossed, adjust the position of the horizontal directional drilling rig 1 to the preset position, and keep the position of the horizontal directional drilling ...

Embodiment 2

[0061] Based on the same inventive concept, this embodiment provides a horizontal directional drilling through impact rotary drilling system, such as Figure 2~3 shown, including:

[0062] Horizontal directional drilling rig 1 is arranged on one side of the rock mass to be traversed;

[0063] Drill pipe 5, non-magnetic drill jack 8, screw motor 9, horizontal directional drilling hydraulic impact drill 11, roller cone bit 12; among them, drill pipe 5, non-magnetic drill jack 8, screw motor 9, horizontal directional drilling hydraulic The impact drilling tool 11 and the roller cone bit 12 are connected in series in sequence, the rear end of the drill rod 5 is connected to the horizontal directional drilling machine 1, the front end of the roller cone bit 12 is facing the rock mass to be crossed, and the horizontal directional drilling machine 1 is used to drill the drill rod 5 Provides thrust, torque and speed;

[0064] Mud tank 10, used for storing mud;

[0065] The mud pump...

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Abstract

The invention discloses a percussive-rotary drilling method and system for horizontal directional drilling crossing. The percussive-rotary drilling method and system for the horizontal directional drilling crossing combine a percussive rock breaking mode with a rotary cutting mode, the rock crack extends through the high-frequency percussion of a horizontal directional drilling crossing percussion drilling tool for the rock, and the rotary cutting efficiency is improved; by means of the high-frequency percussion of the horizontal directional drilling crossing percussion drilling tool for the rock, the positive pressure at the front end of a drill can be improved, the problem of low drilling pressure at the drill end due to long-distance drilling is avoided, enough drilling pressure is provided, the front end of the drill can cut in the rock layer, the secondary abrasion of the drill is avoided, and the service life of the drill is prolonged; impulsion provided by the horizontal directional drilling crossing percussion drilling tool directly acts on the drill to impact the rock, the rotary drilling cutting ability can be greatly improved, the rock layer drilling efficiency is guaranteed, the construction period is shortened, and the drilling cost is lowered.

Description

technical field [0001] The invention relates to the technical fields of horizontal directional drilling and drilling of oil and gas pipelines and oil and gas drilling, in particular to a method and system for horizontal directional drilling and percussion rotary drilling. Background technique [0002] At present, horizontal directional drilling in hard rock formations usually uses a single rock-breaking method of rotary cutting for drilling. The thrust is mainly provided by the drilling rig, and the torque and speed provided by the screw drilling tool itself are used to perform rotary drilling with the roller cone bit. [0003] However, when encountering hard rock formations during horizontal directional drilling, due to the low drilling pressure at the drill bit end, the front end of the drill bit cannot cut into the rock formations, resulting in low drilling efficiency, long construction period, and high drilling costs; The front end cannot cut into the rock formation, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B4/16
CPCE21B7/046E21B4/16
Inventor 焦如义刘厚平刘艳利江勇韩涛魏秦文吴益泉李桂花李松赵辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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