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Method for shielding submersible drilling machine sealing element and air shielded submersible drilling machine

A submersible drilling rig and air shielding technology, which is applied to drilling equipment, earthwork drilling, and driving devices for drilling in boreholes. low effect

Inactive Publication Date: 2004-07-07
刘文敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it is effective, it does not solve the problem fundamentally

Method used

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  • Method for shielding submersible drilling machine sealing element and air shielded submersible drilling machine
  • Method for shielding submersible drilling machine sealing element and air shielded submersible drilling machine

Examples

Experimental program
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Embodiment

[0011] Embodiment: A kind of method (see figure) of shielding submersible drilling rig seal, it is characterized in that it is to use air to isolate mud and seal, shield the drilling rig shaft seal, form an air chamber in the shielding space, and the upper end of the air chamber is connected to the seal. The casing of the drilling rig is sealed and connected, and its lower end is open. According to the final depth of the drilling hole and the specific gravity of the mud, the compressed air volume is calculated, and the length of the air chamber required to ensure the air shielding effect is calculated.

[0012] An air-shielded submersible drilling rig obtained according to the above method, comprising a drill rod 1, a submersible motor 2 connected to the drill rod, a planetary reducer 3, an output shaft 5 of the planetary reducer 3 and its shaft seal 4 and The drill bit 8 connected to the output shaft 5 according to the split flange 7 is characterized in that a cylindrical air ...

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PUM

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Abstract

A method for shielding the sealing part of submersible driller features that the sludge is isolated from the sealing part of shaft by air. A cylindrical air chamber long enough, which has a sealed top end and an open lower end concentric with shaft, is arranged under planitary speed reducer. Its submersible driller is also disclosed.

Description

(1) Technical field: [0001] The invention relates to a basic engineering machine, in particular to a method for shielding a sealing part of a submersible drilling rig and an air shielding type submersible drilling rig thereof. (two) background technology: [0002] For the pile foundation of high-rise buildings, prefabricated piles were used in the early stage, and later developed into cast-in-situ piles. The submersible drilling rig is a kind of cast-in-situ pile construction machine native to our country. The submersible drilling rig does not work in clear water, but in mud with a specific gravity of 1.2-1.4. The primary technical problem is the reliability of the seal of the output shaft. As we all know, the most difficult medium for seals is mud. The failure process of the seal is gradual and difficult to detect at an early stage. The consequence is that the bearings and gears are damaged by the immersed mud. The damage rate is astonishingly high. Nevertheless, submers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B4/00
Inventor 刘文敏
Owner 刘文敏