FIELD: drilling technique. SUBSTANCE: device has rotary pump whose working members are located in chamber filled with viscous oil and isolated from flushing fluid by means of stuffing box. Interior of chamber is bounded by piston of lubricator at the top and working members of pump are separated from under-piston chamber by bottom provided with holes. EFFECT: enhanced efficiency. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR DRILLING | 1993 |
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| ROTARY SHOE OF A CASING STRING | 1994 |
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RU2077657C1 |
| TOOL FOR WELL DRILLING | 1995 |
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| TURBODRILL | 1994 |
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| DEVICE FOR DRILLING BOREHOLES IN SEA BOTTOM | 1993 |
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| WELL-BOTTOM PRESSURE PULSE GENERATOR | 1993 |
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| PILE OIL-AND-GAS SEA PLATFORM | 1993 |
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| TURBODRILL | 1994 |
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RU2078896C1 |
| CASING STRING SHOE | 1993 |
|
RU2093664C1 |
| DRILL BIT | 1993 |
|
RU2077653C1 |
