The Threaded Open-Ended Die Сollar is used for gripping by screwing over outer surface of pipes, upset parts of pipes, couplings, joints and subsequent extraction of drill, tubing or casing strings during fishing operations in the well.
The Threaded Open-Ended Die Collar is a pup joint with box joint at the top and internal fishing thread at the bottom.
To help the collar to cut deeply into the fished object and improve conditions for chips removal special profiled grooves are made along the fishing thread.
The Die Collar can be designed in left/right hand configuration.
The Die Collar with right hand configuration is used for retrieving left pipes simultaneously, with left hand – for retrieving piecemeal by screwing parts of emergency columns.
The Collar provides opportunity to pass top end of the tube through the body of collar and capture it over the upset part of pipe, junction box or lock.