FIELD: mining industry. SUBSTANCE: part of flow of treated drilling fluid is transformed into high-speed jet for action on rock which includes active chemical substances in its composition. Circulation of drilling fluid in borehole is organized in compliance with direct flushing circuit. Concentration of active chemical substances in upward current is checked and if it exceeds established values action on rock of high-speed jet is stopped. When this concentration diminishes action of jet is resumed. Use of invention makes it possible to control process of treatment of drilling fluid while stripping rock masses lying below and having different properties or while drilling boreholes. EFFECT: improved drilling efficiency.
Title | Year | Author | Number |
---|---|---|---|
CUTTING-AND-SHEARING DRILL BIT | 1990 |
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RU2006567C1 |
CORE-DRILL BIT | 1993 |
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CUTTING-SHEARING TYPE DRILLING BIT | 1990 |
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RU2030540C1 |
DEVICE FOR PREPARATION AND TREATMENT OF SOLUTION | 1993 |
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RU2077940C1 |
GEAR FOR TERMINATION OF BOREHOLES | 1989 |
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RU2011803C1 |
HYDROCARBON-BASE DRILLING FLUID | 1994 |
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RU2064957C1 |
GENERAL-PURPOSE MODEL OF DRILL BIT OF CUTTING-SPALLING ACTION | 1991 |
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METHOD OF CEMENTING WELLS | 1990 |
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DEVICE FOR TREATING WELL WALLS | 1989 |
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SU1736223A1 |
DEVICE FOR TRANSPORTATION OF INSTRUMENTS IN HORIZONTAL, UPWARD AND INCLINED WELLS | 1992 |
|
RU2034140C1 |
Authors
Dates
1994-02-15—Published
1990-12-04—Filed