Camco Inc.

Carl E Winders

Fred E Watkins

A grease injection control head for maintaining a seal about a wire performing wireline operations in a well. A tubular body includes a grease injection port for injecting grease for counteracting pressure in the well with a vent port above the injection port for venting fluids. A plurality of tubular members are provided in the body positioned between the injection port and the vent port. Each member includes a close fitting longitudinal bore for passage of a wireline for providing a grease pressure seal. The members are telescopically and sealably joined to adjacent members. The members include an enlarged cavity about the bore at each end for providing a turbulent grease chamber between adjacent members for distributing the pressure drop along the body for reducing loading on the wire and friction with a minimum length body. The length of a longitudinal bore relative to the longitudinal length of a chamber is no greater than 5:1. The body includes a second vent port above the first vent port for acting as a wiper vent port with one or more tubular members between the vent ports. A gas trap may be provided in the body below the injection port for trapping gas from the well. The trap includes means for diverting rising gas from the bore.

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Lafayette, LA, United States of America

Carl E Winders