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Pulse impact producing mechanism and center differential pressure drill comprising same

A technology of pulsation impact and drill bit, which is applied in the direction of drill bit, earthwork drilling, drilling equipment, etc. It can solve the problem that the drilling effect cannot be improved optimally, and achieve the effects of good direction control stability, reasonable force, and protection of the drill bit

Inactive Publication Date: 2017-05-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drilling effect of this type of drill bit has not yet been optimally improved. If other speed-up programs can be implemented on this type of drill bit, the drilling speed is expected to be further improved

Method used

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  • Pulse impact producing mechanism and center differential pressure drill comprising same
  • Pulse impact producing mechanism and center differential pressure drill comprising same
  • Pulse impact producing mechanism and center differential pressure drill comprising same

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Embodiment Construction

[0032]In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

[0033] In the description of the present invention, it should be noted that the length direction of the pulse jet central differential pressure drill bit is the vertical direction after installation; the terms "inner", "outer", "upper", "middle", "lower" etc. The indicated orientation or positional relationship is based on the positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be configured in a specific orientation, and operation, and therefore should not be construed as limiting the invention...

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PUM

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Abstract

The invention relates to a pulse impact producing mechanism and a center differential pressure drill comprising the same. The pulse impact producing mechanism comprises a righting element, a driving element, a rotating element and a throttling element which are placed sequentially, the righting element, the driving element and the rotating element are connected sequentially, the throttling element and the rotating element are in clearance fit, overcurrent channels which are used for flowing of a drilling fluid are arranged on the righting element and the throttling element, the driving element drives the rotating element to rotate, and the overcurrent channels on the rotating element and the throttling element move relatively. The center differential pressure drill comprises a reaming bit, the pulse impact producing mechanism, a pressure regulating element, a transmission mechanism and a pilot bit, and the pressure regulating element, the transmission mechanism and the pilot bit are connected sequentially. Compared with the prior art, the cuttings hold-down effect of the pilot bit and the reaming bit is reduced while rotary impact drilling of the pilot bit can be realized, further the purposes of protecting the bits, prolonging the service lives and improving the drilling speed are realized, and the drilling effect is further improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum engineering and relates to drilling tools, in particular to a pulse impact generating mechanism and a central differential pressure drill bit containing the generating mechanism. Background technique [0002] With the development of oil and gas exploration to deeper and harder formations, the requirements for drilling are getting higher and higher, and people pay more and more attention to improving drilling speed. It is the most effective means to increase the ROP by releasing the stress of the rock formation in advance and changing the stress field of the drilled formation. At present, experts and scholars at home and abroad use two methods to realize this method. The first way is to release the formation stress based on the hydraulic energy of the drilling fluid, which is represented by high-pressure pulse jet, cavitation pulse jet and abrasive pulse jet technologies. The method of releasing...

Claims

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Application Information

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IPC IPC(8): E21B10/38E21B10/26E21B10/00
CPCE21B10/00E21B10/26E21B10/38E21B4/06E21B6/00E21B6/04E21B10/40E21B10/602E21B10/62E21B10/60
Inventor 刘永旺管志川呼怀刚王庆张波许玉强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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