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Pre-mixed abrasive high pressure water-jet system rotary pipe joint structure

A technology of high-pressure water jet and pre-mixed abrasives, which is applied in drilling pipes, casings, drilling with liquid/gas jets, etc., can solve problems such as seal leakage, and achieve the effects of improving working life, stability and safety

Inactive Publication Date: 2009-01-07
ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the lateral force generated by the rotation is likely to cause the seal to leak, which also puts forward higher requirements for structural design and sealing performance.

Method used

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  • Pre-mixed abrasive high pressure water-jet system rotary pipe joint structure
  • Pre-mixed abrasive high pressure water-jet system rotary pipe joint structure
  • Pre-mixed abrasive high pressure water-jet system rotary pipe joint structure

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Experimental program
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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, it includes a hose joint 1, a joint body 2, and a rear cover 3. The rear cover 3 and the joint body 2 are fixedly connected by bolts, and a sealing ring 8 is provided at the joint. The front end of the hose joint 1 is processed with an external thread for installing a high-pressure hose. A vertical water outlet 12 is opened in the middle of the hose joint 1. The vertical water outlet 12 communicates with the inner water inlet 11. In the hose joint 1 Both sides of the vertical water outlet 12 are respectively provided with two annular grooves 13, see figure 2 As shown, a sealing ring 6 is respectively installed in the annular groove 13, the joint body 2 and the hose joint 1 are connected by bearings, the inner part is the second composite bearing 5, the outer part is the first bearing 4, and the water inlet of the joint body 2 is a ...

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Abstract

The present invention discloses a pre-mixed abrasive high pressure water-jet system return bend joint structure which comprises a joint body, a hose joint and a rear cover. The rear cover is fixedly connected with the joint body. The rear cover is provided with a spray head. A through hole is arranged in the joint body. A spray head water inlet is communicated with the water outlet of the hose joint by the through hole of the joint body. The hose joint and the joint body are rotatablely connected by a bearing. The two sides of the water outlet of the hose joint are respectively provided with at least two annular grooves which are equipped with obturating rings inside. Compared with the prior art, the bearing is arranged between the joint body and the hose joint; the original fixed connection of the joint body and the hose joint is changed into the rotary connection; a high pressure water pipe and a drill rod do not interfere with each other, thereby improving the stability and the safeness; the multi-grade seal of at least two obturating rings is arranged between the joint body and the hose joint, thereby effectively preventing the leakage of abrasive and prolonging the service life of a pipe joint.

Description

technical field [0001] The invention relates to the technical field of fluid power, in particular to a rotary pipe joint of a pre-mixed abrasive high-pressure water jet system. Background technique [0002] In the high-pressure water jet drilling system, the pipe joint must be connected to the drill pipe of the drilling rig and also to the high-pressure hose. During the operation, the rotation of the drill pipe will drive the pipe joint to rotate, which will drive the high-pressure hose to rotate, so that It will twist the high-pressure hose and generate a large resistance moment to the rotation of the drill pipe. Therefore, a rotary pipe joint is used to realize the dynamic and static conversion between the rotation and the static. Since there is a rotary kinematic pair in the rotary pipe joint and abrasives are contained in the high-pressure water, the requirements for the structure and wear resistance of the pipe joint are very high. At the same time, the lateral force g...

Claims

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Application Information

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IPC IPC(8): E21B17/02E21B7/18
Inventor 龚烈航王强倪恩来王洪伦苏丹武光华李辉
Owner ENG COLLEGE OF ENG CORPS PLA UNIV OF SCI & TECH
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