DEVICE FOR TRANSFER AND FIXATION OF EQUIPMENT IN WELL Russian patent published in 2011 - IPC E21B23/01 

FIELD: oil and gas production.

SUBSTANCE: device for transfer and fixation of equipment in well consists of case with upper and lower threads and with orifices. Dies held down with return springs are inserted into the orifices. A strap performing limited outside travels interacts with the die in its limit position. To interact in the limit position with the strap the die is equipped with a circular grooved expansion inside, while the strap corresponds to a plate with upper and lower faces and with an orifice for the die. Outside in the case there are made recesses for the straps, while inside there are made grooves for the return laminar springs interacting with the grooves of the corresponding dies. The straps and the return springs are fixed on the case with upper and lower subs screwed on corresponding threads of the case and equipped with internal and external lugs interacting correspondingly with the return springs and straps.

EFFECT: centring and reliable fixation of device and transfer of well equipment; eliminating hazard of device destruction caused by excess pressure and eliminating full projection of dies from case.

1 dwg