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Wireline cycle life counter

  • US 5,278,549 A
  • Filed: 05/01/1992
  • Issued: 01/11/1994
  • Est. Priority Date: 05/01/1992
  • Status: Expired due to Fees
First Claim
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1. Apparatus including a wireline monitor/controller for monitoring and controlling a wireline unit including a wireline connected to the wireline unit, the wireline having an upper end, a lower end, a rated weight, and having a wireline tool attached to its lower end, the wireline being run down a well bore during a wireline job, the well bore having an upper end, the monitor/controller comprising:

  • (a) first alarm means for giving an alarm at a predetermined percentage of cycle life of the wireline;

    (b) display means to give a reading of the percentage of cycle life at any point on the wire;

    (c) second alarm means for indicating when the weight on the wire exceeds the rated weight of the wire;

    (d) logging means for logging well head pressure in the well bore;

    (e) monitoring means for monitoring the location of the lower end of the wireline to prevent a blow-out-preventer valve from closing and cutting the wireline and to prevent a wireline tool from being pulled off of the lower end of the wireline when the lower end of the wireline reaches the upper end of the well bore;

    (f) velocity monitoring means for monitoring the velocity of the wireline; and

    (g) shut-down means for shutting down the wireline unit in response to any of the measurements which the monitor/controller makes.

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