FIELD: oil and gas producing industry; applicable in instruments for their centering in well investigation. SUBSTANCE: spring has a thermally flexible plate body bent in longitudinal direction by arc and cover plates with holes for axles, and mounted on both ends of spring body. The body middle part is curved in cross-section by well radius or its string and rectilinear in longitudinal direction. In this case, length of said body part is made larger than box clearance between string pipe ends screwed by thread into box. EFFECT: higher wear resistance of spring. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PISTON DEVICE FOR OIL RECOVERY | 2000 |
|
RU2178514C2 |
| BLOWOUT PREVENTER | 2000 |
|
RU2188318C2 |
| DEVICE FOR OIL RECOVERY | 2000 |
|
RU2172391C1 |
| HOOK-WALL TUBING PACKER | 2000 |
|
RU2177532C2 |
| DEVICE FOR MECHANICAL REMOVAL OF GAS HYDRATE-PARAFFIN ACCUMULATIONS | 2000 |
|
RU2175375C1 |
| ELECTRIC HEATER UNIT | 2000 |
|
RU2177533C2 |
| ACTUATOR FOR DOWNHOLE INSTRUMENTS | 2000 |
|
RU2178064C2 |
| JET PERFORATOR CARRIER | 2001 |
|
RU2185499C1 |
| METHOD OF SEALING THE SWABBING MEMBER IN PIPE IN THE COURSE OF SWABBING AND DEVICE FOR METHOD EMBODIMENT | 2000 |
|
RU2188936C2 |
| HYDRAULIC PERFORATOR | 2001 |
|
RU2190759C1 |
