Type DLT-T Releasable Reversing Overshot, a type of fishing tool designed to recover and back off the stuck pipeshaped fish like drill pipe ,oil tubing ect. Its distinguishing features are as follows: to unscrew and recover the stuck fish; to release the fish down hole if necessary; to circulate the washing fluid.
Technical parameters and specifications
Type | O.D. (mm) | Catch size (mm) | Allowable pull force(KN) | Reversing tensile force and applied torque | Thread conn. | |
Tensile force(KN) | Torque (N・m) | |||||
DLT–T95×48 | 95 | 47.0–50 | 250 | 120 | 3100 | 2 7/8REG |
DLT–T105×60 | 105 | 60–62 | 350 | 150 | 5750 | 2 7/8IF(NC31) |
DLT–T114×73 | 114 | 72.0–75 | 420 | 180 | 7750 | 2 7/8IF(NC31) |
DLT–T134×89 | 134 | 88–91 | 500 | 180 | 10250 | 3 1/2IF(NC38) |
DLT–T145×102 | 145 | 101–104 | 700 | 200 | 11050 | 3 1/2IF(NC38) |
DLT–T160×114 | 160 | 113–115 | 900 | 200 | 12150 | 4 1/2REG |
DLT–T185×127 | 185 | 126–129 | 1200 | 240 | 13500 | 4 1/2IF(NC50) |
DLT–T200×140 | 200 | 139–142 | 1500 | 240 | 15300 | 4 1/2IF(NC50) |
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