Patents by Inventor Mark E. Crews

Mark E. Crews has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tension hanger landing bowl
    Patent number: 4501441
    Abstract: A wellhead assembly having a wellhead member with an internal shoulder providing an upper outer shoulder and a lower inner seat, and a plurality of pins threaded therethrough and a landing bowl of arcuate segments connected and biased apart at their facing ends to seat on the upper shoulder so that a tubing string may be run therethrough and moved inward by said pins to be above the lower inner seat for seating thereon to support a tubing string in tension therebelow.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: February 26, 1985
    Assignee: Cameron Iron Works, Inc.
    Inventor: Mark E. Crews