FIELD: mining, particularly well drilling for water, oil and gas production, as well as underground leaching well drilling.
SUBSTANCE: method involves lowering drilling head connected to drilling string in well, wherein drilling head includes body with projecting sizing, cutting, radial conical, end and support parts; drilling well and sizing well bore. Projected sizing parts have reverse flare. Well is drilled with high speed and full load applied to drilling head to create non-drilled sections in well bore. Well sizing and non-drilled section drilling is carried out by reverse drilling. Support parts are arranged in upper body part and are made as centrators carried by non-drilled sections in well bore, which are defined by direct drilling.
EFFECT: increased efficiency and service life due to high-speed drilling and possibility to separate well drilling and well sizing operations.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2314407C1 |
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RU2327026C2 |
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| WELL BORING METHOD AND DEVICE | 2004 |
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| METHOD AND APPARATUS FOR FILTER WELL FORMING | 2003 |
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| FILTERING WELL CONSTRUCTION METHOD | 2006 |
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| FILTERING WELL CONSTRUCTION METHOD | 2006 |
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| DEVICE FOR WELL DUAL-ZONE PRODUCTION | 2001 |
|
RU2206723C1 |
