Automatic screw-on pipe couplings

Details Automatic screw-on pipe couplings Automatic screw-on pipe couplings

1991-06-14

1994-06-14

Kostak, Victor R.

Television

Special applications

Manufacturing

7386223, 29407, 29240, H04N 718

Patent

active

053215060

ABSTRACT:
The invention is a method and apparatus for continuously monitoring the application of a coupling to a pipe. The invention operates in several modes. In the position mode, the apparatus rotates the coupling to a desired final position. In the program mode, the apparatus determines the actual location of the hand-tight plane and continuously monitors the torque applied and the number of turns of rotation of the coupling from the hand-tight plane to the desired final position. In either of these modes, the torque applied is monitored and rotation of the coupling is discontinued if a preset maximum torque value is exceeded. If the coupling is rotated to the desired final position without reaching a minimum torque, the pipe and coupling are rejected. An image processing system is employed to locate several critical make-up parameters.

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"Specification for Threading, Gaging, and Thread Inspection of Casing, Tubing and Line Pipe Threads", API Specification STD 5B, 13th Edition, May 31, 1988 by American Petroleum Institute.
Mobile Oil Coompany Procedure for Makeup of API Connections with Torque-Turn Monitoring Equipment; Dec. 28, 1988.
Mobile Oil Company Procedure for Make-Up of API Connections with Torque-Turn Monitoring Equipment; Mar. 21, 1991.

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