DLT-T Releasing and Reversing Overshot
Application
Type DLT-T Releasable Reversing Overshot, a new type of fishing tool, has many advantages owned by various overshot, box tap and the like. 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 as one of the accessories for reversing tools. It is widely used in well servicing.
Consists of :
top sub, spring, bowl, retaining seat, slip, control key, seal ring, seal seat, guide and so on.
Operation:
The upper end of top sub is connected with other tools and drill tool. The lower end of top sub is connected with bowl equipped with spring in the interior. There are three control keys uniformly distributed in the inner wall of the upper end of bowl. the control keys are used to control the position of retaining seat. Three keys are inserted separately in three grooves in the tapered interior section of lower end in bowl where three keys are used to transmit torque. The tapered interior section produces a pinch force against the slip to trigger the fishing operation. The inclined angle among three control keys play an important role in retaining conformance of the slip with the bowl to ensure that the tools can be released easily from the fish.
The retaining seat is installed at the upper end of the external bowl where the three keys are placed. The retaining seat not only can slide axially, but also rotates round the axial line moving with the slip which is installed in the internal circular recess.
Model:
DLT-T95×48 DLT-T105×60 DLT-T114×73 DLT-T134×89 DLT-T145×102 DLT-T160×114 DLT-T185×127 DLT-T200×140 DLT-T105×60F DLT-T114×73F DLT-T134×89F DLT-T134×89F DLT-T160×114F
Specifications - Releasing and Reversing Overshot Connection LH
1 Releasing and Reversing Overshot Connection LH DLT-T95×48 95 48.3 250 120 3100 2 7/8 REG
2 Releasing and Reversing Overshot Connection LH DLT-T105×60 105 63.5 350 150 5750 NC31
3 Releasing and Reversing Overshot Connection LH DLT-T114×73 114 78.6 420 180 7750 NC31
4 Releasing and Reversing Overshot Connection LH DLT-T134×89 134 93.2 500 180 10250 NC38
5 Releasing and Reversing Overshot Connection LH DLT-T145×102 145 101.6 700 200 11050 NC38
6 Releasing and Reversing Overshot Connection LH DLT-T160×114 160 114.3 900 200 12150 NC38
7 Releasing and Reversing Overshot Connection LH DLT-T160×114 160 114.3 900 200 12150 2 7/8 REG
8 Releasing and Reversing Overshot Connection LH DLT-T185×127 185 127 1200 240 13500 NC50
9 Releasing and Reversing Overshot Connection LH DLT-T200×140 200 139.7 1500 240 15300 NC50
Specifications - Releasing and Reversing Overshot connection RH
1 Releasing and Reversing Overshot connection RH DLT-T105×60F 105 63.5 350 150 5750 NC31 L07-6010
2 Releasing and Reversing Overshot connection RH DLT-T114×73F 114 78.6 420 180 7750 NC31 L07-7310
3 Releasing and Reversing Overshot connection RH DLT-T134×89F 134 93.2 500 180 10250 NC38 L07-8910
4 Releasing and Reversing Overshot connection RH DLT-T134×89F 134 93.2 500 180 10250 NC31 L07-8920
5 Releasing and Reversing Overshot connection RH DLT-T160×114F 160 114.3 900 200 12150 NC38 L07-11420
