Screw drill
A screw drilling tool and screw technology, which is applied to drilling equipment, earthwork drilling, and driving devices for drilling in boreholes. long life effect
Inactive Publication Date: 2017-02-22
钟文楚
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Abstract
The invention provides an all-metal screw drill. Usually, an all-metal screw drill is composed of a multi-screw hydraulic motor assembly, a transmission shaft assembly and an inside engaged gear, the common inside engaged gear is prone to abrasion in a drilling fluid environment, and the gear is prone to being disengaged to cause fall-into-well accidents after a shell is fractured. An inside engaged gear of the screw drill is made from solid carbide and designed to be a straight gear and is capable of being machined through a linear cutting machining method; an anti-falling ring or an anti-falling disc is mounted on the gear to prevent gear disengagement; and the all-metal screw drill can effectively prevent the fall-into-well accidents caused by shell fracturing, and the service life of the inside engaged gear is long.
Application Domain
Borehole drives
Technology Topic
Fall into wellEngineering +6
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