US 12,168,909 B1
Recovery tool and method for tubing hanger
Zhongfei Sui, Dongying (CN); Huaguo Liu, Dongying (CN); Xiaotao Yu, Dongying (CN); Juliang Ge, Dongying (CN); Wuhai Wang, Dongying (CN); Xiaoxiao Guo, Dongying (CN); and Xu Chen, Dongying (CN)
Assigned to WEFIC Ocean Equipment Manufacturing co., Ltd., Dongying (CN)
Filed by WEFIC Ocean Equipment Manufacturing co., Ltd., Dongying (CN)
Filed on May 23, 2024, as Appl. No. 18/672,026.
Claims priority of application No. 202311746762.1 (CN), filed on Dec. 19, 2023.
Int. Cl. E21B 33/04 (2006.01)
CPC E21B 33/04 (2013.01) 4 Claims
OG exemplary drawing
 
1. A recovery method for a tubing hanger, configured for a tubing hanger recovery tool, wherein the tubing hanger recovery tool comprises: a mandrel, a locking part and a hook claw part;
a lower end face of the mandrel is in contact with an inner side of the locking part, and the mandrel squeezes the locking part when moving to the tubing hanger, and the locking part is locked with the tubing hanger after being squeezed;
both sides of a bottom end of the mandrel are inverted trapezoidal surfaces, the inner side of the locking part is a regular trapezoidal surface, and an inclined surface of the bottom end of the mandrel is in contact with an inclined surface of the locking part;
the locking part comprises a locking block and a locking ring;
the locking block has a right-angled trapezoidal structure, and an inclined waist of the locking block is in contact with the inclined surface of the bottom end of the mandrel;
a right-angled waist of the locking block is connected with the locking ring;
when the mandrel moves to the tubing hanger, the mandrel pushes the locking block and the locking ring, and the locking ring locks the tubing hanger;
the hook claw part surrounds the mandrel, and the mandrel drives the hook claw part to the tubing hanger when moving to the tubing hanger, and the hook claw part is clamped with a setting ring of the tubing hanger;
wherein the recovery method for the tubing hanger comprises:
moving the tubing hanger recovery tool directly above the tubing hanger;
moving the mandrel downwards for a first distance, the bottom end of the mandrel squeezes the locking part, and the locking part is locked with the tubing hanger, and the hook claw part is clamped with the setting ring of the tubing hanger;
moving the mandrel upwards for a second distance, and under a drive of the mandrel, the hook claw part moves upwards for the second distance together with the setting ring of the tubing hanger;
pulling the tubing hanger to move with the tubing hanger recovery tool to realize a recovery of the tubing hanger;
wherein before pulling the tubing hanger to move with the tubing hanger recovery tool, further comprising:
carrying out a safety detection, and if determining that the tubing hanger recovery tool is allowed to pull the tubing hanger, recovering the tubing hanger;
if determining that the tubing hanger recovery tool is not allowed to pull the tubing hanger, controlling the tubing hanger recovery tool to unlock the tubing hanger;
wherein the step of controlling the tubing hanger recovery tool to unlock the tubing hanger comprises:
moving the mandrel downwards for a third distance to unlock the hook claw part from the setting ring of the tubing hanger;
moving the mandrel upwards for a fourth distance to unlock the locking part from the tubing hanger;
wherein the step of moving the mandrel downwards for the third distance to unlock the hook claw part from the setting ring of the tubing hanger comprises:
moving the mandrel downwards for the third distance, wherein a bottom end of the hook claw part expands, and unlocking the hook claw part from the setting ring of the tubing hanger.