A wellhead torque slow-release undercut protection device and method and special anti-twist rod

Abstract

The invention discloses a wellhead torque slow-release undercut protection device and method and a special anti-torsion bar. The device includes an anti-torsion bar, a lower beam, and a ground anchor. The end is connected with the upper end of the ground anchor, and the lower beam simultaneously fixes the shell of the casing spool and the hydraulic drilling disc. The anti-twist rod includes an anti-reverse flange, a telescopic rod, and a telescopic rod sleeve. An external thread is provided, and an internal thread is provided on the telescopic rod sleeve. The anti-reversal flange is fixed on the lower beam by bolts, and the rear end of the telescopic rod is provided with a fixing hole for connecting ground anchors. The invention prevents the loosening of the screw thread between the casing head and the lower flange of the wellhead caused by excessive forward and reverse torque of the drilling disc.

Description

technical field [0001] The invention relates to oil production well operation equipment, in particular to a wellhead torque slow-release undercut protection device and method and a special anti-torque bar. Background technique [0002] When drilling plugs, casing milling and fishing in oil and water well repair operations, it is necessary to drive the drilling tool to rotate up and down through the hydraulic drill disc. The drill disc is connected to the wellhead cross, and the lower part of the cross is the wellhead lower flange. The casing head is connected by casing pup joint threads. During the process of salvage and buckling, the rotation of the drilling disc drives the drilling tool to rotate up and down. In order to prevent the forward and reverse torque of the drilling disc from being too large, the speed is out of control, causing the casing head and the wellhead to go down. The flange screw thread is disassembled, which poses a safety hazard. It is necessary to des...

AI Technical Summary

Problems solved by technology

[0002] When drilling plugs, casing milling and fishing in oil and water well repair operations, it is necessary to drive the drilling tool to rotate up and down through the hydraulic drill disc. The drill disc is connected to the wellhead cross, and the lower part of the cross is the wellhead lower flange. The casing head is connected by casing pup joint threads. During the process of salvage and buckling, the rotation of the drilling disc drives the drilling tool to rotate up and down. In order to prevent the forward and reverse torque of the drilling disc from being too large, the speed is out of control, causing the casing head and the wellhead to go down. The flange screw thread is disassembled, which poses a safety hazard. It is necessary to design a device that slows down the torque at the wellhead and protects the undercut

[0003] After searching, no disclosed technical solutions similar to the present application were found

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