Design and Application of Remote Hydraulic Fast Loading Wellhead Device
In order to solve the emergency situation such as blowout and fire in oil field,a remote hydraulic fast mounting wellhead device was developed.After using the existing remote manipulator in the oil field to cut the casing body part,the device was inserted into the casing when only the bare casing was left,and the remote control console of the BOP was used to provide power.The two-way piston was started to drive the conical tie rod to move upward,and the outer cone of the conical tie rod pushed the slips outward,so that the slips were stuck to the inner wall of the casing.The small piston moved down and compacted the sealing cylinder axially,and the rubber cylinder expanded outwards to realize clamping and sealing the outer wall of the center pipe of the wellhead device and the casing annulus.Then,the upper BOP gate was closed so as to seal the wellhead.The pressure of the hydraulic control cham-ber of the device was 21 MPa,the pressure of the tight seal was 70 MPa,and the pressure of the shell was 105 MPa.The rubber cyl-inder,a key component of the wellhead installation device,was simulated and analyzed.The sealing length is maintained at a stable level and the sealing performance is good.In a word,this device has been applied and implemented in Daqing oilfield and has played a good role in emergency sealing,meeting the requirements of safety and economy.
bare casingblowout preventerclamp and sealcasing annulussimulation analysis
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