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Get PriceRetractable core drill bit having a hollow cylindrical body at its lower end to which a monolith core drill bit is screwed. A stop sleeve is provided on the upper end of the hollow cylindrical body, and cutting components are pivotally mounted in the middle of the body. There is a spacer in the body having an end piece on its upper end around ...
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Get Price1. A retractable bit assembly comprising, 2. The retractable bit assembly of claim 1, including in combination therewith, a core barrel removably affiliated therewith to receive a formation core bored by said annular drill bit assembly. 3. A retractable drill bit assembly comprising, 4.
Get PriceRetractable core drill bit having a hollow cylindrical body at its lower end to which a monolith core drill bit is screwed. A stop sleeve is provided on the upper end of the hollow cylindrical body, and cutting components are pivotally mounted in the middle of the body. There is a spacer in the body having an end piece on its upper end around which there is driven a guiding sleeve resting on a ...
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Get Price2016-5-11 · Audited Supplier Business Type: Manufacturer/Factory, Trading Company. Main Products: Kelly Bar, Drill Bucket, Casing Tube, Drill Bits, DTH Tools, Anchorage Block, Casing Oscillator, Drill Auger, DTH Drill Rig, Rotary Drill Rig ... Diamond Tool, Diamond Drill Bit, Hardware Tool. City/Province. Wuhan, Hubei, China. 2016 High Quality Carbide DTH ...
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Get Price1. A retractable bit assembly comprising, 2. The retractable bit assembly of claim 1, including in combination therewith, a core barrel removably affiliated therewith to receive a formation core bored by said annular drill bit assembly. 3. A retractable drill bit assembly comprising, 4.
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