| 摘要 |
A well logging- or well intervention string (0) injector comprising two adjacent motorized endless chains (16) with gripper elements (2) for bearing against the string (0), -wherein the gripping elements (2) have an engagement packer against the string (0), -wherein the gripping elements (2) runs over the back supporting rollers (3) carried by separate back supporting roller brackets (4), -wherein the back supporting roller brackets (4) further bear against an elongated hydrostatic pressure equalizing cushion (5) with hydraulic fluid (15), -wherein further the pressure equalizing cushion (5) bears against a back supporting rail (6). |
