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Rotary Hammer Drilling Tools

A drilling tool and percussion technology, applied in the field of rotary percussion drilling tools, can solve the problems of limited drilling speed and drilling efficiency, poor rock breaking ability of the drill bit, etc., achieve high rotational speed, improve torque transmission efficiency, increase drilling speed and efficiency effect

Inactive Publication Date: 2019-12-03
蒋培丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents drive the axial reciprocating motion of the lower shaft body through the cooperation of the cam and the roller to generate axial vibration and shock combined with the rotation of the lower shaft body to realize the rotary drilling mode. Since the lower shaft body needs to generate axial reciprocating motion during the rotation process, The improvement of drilling speed and drilling efficiency is very limited, and the rock-breaking ability of the drill bit is poor when encountering hard objects such as rocks

Method used

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Examples

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Embodiment 1

[0050] see figure 1 , a rotary percussion drilling tool, including a bypass valve assembly 1a, an anti-drop assembly 2a, a motor assembly 3a, a cardan shaft assembly 4a, and a drive shaft assembly 5a that are sequentially connected by threads, the above structure and The prior art is the same and will not be described in detail. The drive shaft assembly 5a includes a drive shaft 51a with a hollow channel, one end of the drive shaft 51a is threadedly connected with an impact device 1b, and the end of the drive shaft 1b away from the connection with the drive shaft 51a is threaded with a drill bit 1c. The drill bit 1c is a PDC drill bit.

[0051] see figure 2 and image 3 One end of the transmission shaft 51a is provided with a fixing groove, the fixing groove is in the shape of a truncated cone and communicates with the hollow channel 511a, and the end facing the notch is a large end. A protective cover 51b is installed in the fixing groove, and the outer contour shape of ...

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Abstract

The invention discloses a rotary impact type drilling tool. The rotary impact type drilling tool comprises a by-pass valve assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly which are connected in sequence, the transmission shaft assembly comprises a transmission shaft internally provided with a hollow channel, one end of the transmission shaft is connected to an impact device, and the end of the impact device is connected to a drill; a transverse impact mechanism is utilized to generate transverse rotation impact force with certain frequency through the collision of a rotary impact hammer, a longitudinal impact mechanism generates longitudinal impact force with certain frequency through the collision of a longitudinal impact hammer, the combination of the transverse rotation impact force and the longitudinal impact force forms a three-dimensional motion impact effect, a rotary impact motion with a three-dimensional impact mode is formed through the rotation of the transmission shaft, thus the drilling speed is increased, and the drilling efficiency is improved.

Description

technical field [0001] The invention relates to oil drilling equipment, in particular to a rotary percussion drilling tool. Background technique [0002] How to increase the drilling speed is currently a technical problem being studied by countries all over the world. In particular, with the increase of well depth, the loss of hydraulic power along the way increases, the available water energy of the drill bit at the bottom of the well decreases sharply, and the ability of hydraulic rock breaking and rock cleaning is weakened, resulting in deep wells. Problems such as low drilling speed, rapid drill bit wear and serious sticking; in addition, in order to improve oil production efficiency, more and more attention has been paid to horizontal wells, lateral wells, extended-reach wells, and slave wells, and the current wellbore is becoming more and more irregular , friction and torque are large, sliding drilling is difficult, and the wellbore extension range is small. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/16
CPCE21B4/16
Inventor 蒋培丽
Owner 蒋培丽
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