FIELD: well drilling. SUBSTANCE: bottom- hole assembly of drill string includes drill bit, bottom-hole motor and drill collars connected with it. Pins of pipe joints are installed relative to boxes with gap between their end stops and locked with shear stop members. When certain torque is applied to drill string stop member is sheared and pipes are unscrewed alternately. EFFECT: higher efficiency. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR PREVENTION OF COMPLICATIONS IN WELL | 1991 |
|
RU2019679C1 |
| DETACHABLE CONNECTION OF PRESSURE PIPE STRING IN WELL | 2004 |
|
RU2262582C1 |
| LOCKING CLUTCH FOR DOWNHOLE MOTOR | 2008 |
|
RU2471954C2 |
| ELECTRIC DOWNHOLE MOTOR FOR DRILLING OIL AND GAS WELS | 2022 |
|
RU2803273C1 |
| ASSEMBLY OF BOTTOM OF DRILL STRING FOR DRILLING OF OFFSHOOTS FROM HORIZONTAL PART OF UNCASED WELL | 2019 |
|
RU2715482C1 |
| METHOD FOR LIQUIDATING JAMMING OF PIPE STRINGS IN WELL | 1995 |
|
RU2106470C1 |
| BOTTOM HOLE ASSEMBLY FOR DRILLING OF OFFSHOOTS FROM HORIZONTAL PART OF OPEN BOREHOLE | 2019 |
|
RU2710052C1 |
| DOWNHOLE HYDRAULIC JACK FOR RELEASING OF STUCK PIPES | 2005 |
|
RU2282708C1 |
| DOWNHOLE HYDRAULIC JACK TO REMEDY SEIZURES | 2000 |
|
RU2190080C2 |
| JARRING DEVICE | 0 |
|
SU1752928A2 |
