FIELD: mining.
SUBSTANCE: well drilling bit includes front surface; multiple radial blades equipped with cutting elements; besides, blades are distributed around front surface; core formation space located in the centre of front surface; cavity for removal of the core to the bit periphery; besides, the above cavity is located between two adjacent blades and restricted with two side surfaces and one rear surface. The latter is moved backwards relative to front surface. Well drilling method involves use of the above bit and formation of the core in the bit centre, removal of core through the drilled well to the ground surface and core removal.
EFFECT: quick drilling of wells of large depth in any rocks without any risk of the bit blockage with rock.
16 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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RU2418937C1 |
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RU2482274C2 |
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RU2332553C2 |
