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Ultrahigh-pressure axial sealing structure drill rod

A technology of axial sealing and ultra-high pressure, applied in the direction of drill pipe, drill pipe, drilling equipment, etc. Pressure or pressure-holding performance and other issues, to achieve the effect of repeated disassembly times, high pressure bearing capacity, and smooth installation

Pending Publication Date: 2021-08-31
CCTEG SHENYANG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of the same clearance, the leakage of ultra-high pressure system will be several times or dozens of times larger than that of high pressure; on the other hand, due to the small flow rate, a slight leakage will seriously affect the boosting or pressure-holding performance of the ultra-high pressure system
When the pressure of the fluid medium exceeds 100MPa, it is difficult to meet the sealing requirements and the actual needs of repeated installation and use simply by relying on single or multiple O-rings, Y-rings, combined sealing rings, etc., which will affect the safety and application of hydraulic measures. to promote

Method used

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  • Ultrahigh-pressure axial sealing structure drill rod
  • Ultrahigh-pressure axial sealing structure drill rod
  • Ultrahigh-pressure axial sealing structure drill rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] refer to figure 1 , a drill pipe with an ultra-high pressure axial seal structure, the drill pipe includes a drill pipe body 31, a first axial seal structure 311 is provided on the outer peripheral surface of the front end of the drill pipe body 31, and the rear end of the drill pipe body 31 A second axial sealing structure 312 is provided on the inner peripheral surface, and the first axial sealing structure 311 includes a first straight-axis guide section 3111, a first inner cone sealing tapered thread 3114, a first O-ring 3112 and a first The right-angle slip ring 3113 is provided with a rectangular groove on the first straight-axis guide section 3111, and the first O-ring 3112 and the first right-angle slip ring 3113 are installed in the ring groove. The rear end of the section...

Embodiment 2

[0042] The difference from Embodiment 1 is that a spiral groove 314 is provided on the outer peripheral wall of the drill pipe body 31, which facilitates the discharge of coal and rock debris when implementing hydraulic measures, and at the same time reduces the weight of the drill pipe and labor intensity.

Embodiment 3

[0044] The difference from Embodiment 1 is that the drill pipe body 31 is a hollow cylinder, and the front end of the second axial sealing structure 312 in the ultra-high pressure sealed drill pipe body 31 is provided with the first inner cylindrical hole. Segment 3122 is coaxially disposed with stepped hole 315 .

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Abstract

The invention discloses an ultrahigh-pressure axial sealing structure drill rod. The drill rod comprises a drill rod body, wherein a first axial sealing structure is arranged on the outer circumferential surface of the front end of the ultrahigh-pressure sealing drill rod body, and a second axial sealing structure is arranged on the inner circumferential surface of the rear end of the drill rod body; the first axial sealing structure comprises a first straight-axis guide section, a first inner cone sealing taper thread, a first O-shaped ring and a first right-angle sliding ring; and the second axial sealing structure comprises a first outer cone sealing taper thread and a first inner cylindrical hole section which are sequentially arranged from back to front. According to the ultrahigh-pressure axial sealing structure drill rod, multiple sealing is formed by gap sealing, combined sealing and taper thread sealing, the highest pressure bearing of the sealing structure can reach 400MPa or even higher, and the ultrahigh-pressure axial sealing structure drill rod has the advantages of being high in pressure resistance, smooth in installation, large in repeated disassembling frequency and the like.

Description

technical field [0001] The invention relates to the technical field of drill rod sealing, in particular to a drill rod with an ultra-high pressure axial sealing structure. Background technique [0002] Coal still occupies an important proportion in my country's energy structure. With the continuous use of new technologies and equipment for coal mining, coal mining continues to deepen at a rate of about 10-20m per year, and deep coal-rock gas dynamic disasters have gradually become constraints for coal mines. The main issue of safe and efficient production. The disaster-causing mechanism of coal-rock gas dynamic disasters in deep mines is becoming more and more complex, and disaster prevention and control must be carried out from the perspective of coal seam gas drainage compliance and effective pressure relief. The hydraulic pressure relief and permeability enhancement measures for coal seams have the effect of getting twice the result with half the effort. Under the deep hi...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/02
CPCE21B17/00E21B17/02
Inventor 李艳增王耀锋许幸福薛伟超王春光黄鹤唐辉苏伟伟张东旭刘春刚汪开旺高中宁韩兵
Owner CCTEG SHENYANG RES INST
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