Lifting-Lower and releasing overshot is a
fish tool in the casing which fishes fractured tubing and drill string. If fish
drill string is stuck heavily and hard to complete fish work, while need to
release fish, may get back the tool by bumping drill string down and lift
directly.
The excellent advantage of the product is
no need rotating, only through lift and lower, complete catching and releasing
fish, It is convenient for the mini-maintenance.
Structure
Lifting-lower and releasing overshot is
composed of top sub, bowl, guide pin, guide sleeve, joint sleeve,plug, roller
pin, slip, guide, as shown in the figure. Box thread of top sub is connected
with drill stem, pin thread is connected with the bowl, The bottom of bowl is
connected with guide, An inner cone in the bowl matches the slip, Box thread of
guide sleeve is connected with joint sleeve, track trenches are milled on
another outer surface: three long trenches and three short trenches act as
guiding and reversing ,When guide pin locates in long trench is in the condition
of fish ,When guide pin locates in short trench is in the condition of release,
Joint sleeve is two petals formation ,It makes slip and guide sleeve connection
and by roller pin act as bearing, The inner surface of slip has fish thread,
guide is on the bottom and can make fish introduce into slip
successfully.
Working
Principle
The tool complete fishing and releasing
fish through long, short track trenches. When the tool reaches the top of fish,
lower and let it enter the fish, Through lift or lower, guide pin is in the
position of long or short trench, slip is in the situation of fishing or
releasing, in the condition of non-rotating complete fishing and releasing
fish.
Specifications - Lifting-Lowering and
Releasing Overshot
|
Model
|
O.D.(mm)
|
Connection
|
Catch
Size(in)
|
|
TFLT48
|
95
|
NC26
|
1.9
|
|
TFLT60
|
105
|
NC31
|
2 3/8
|
|
TFLT73
|
115
|
NC31
|
2 7/8
|
|
TFLT89
|
134
|
NC38
|
3 1/2
|
|
TFLT114
|
150
|
NC38
|
4 1/2
|
For more information, please contact with freely
Contact: Frank Email: frank@sapwells.net
Website: www.sapwells.net
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