Casing Centralizer Coupling
OwnerJim Wheeler, Rob Kappinventors
Life of this patent
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Abstract
A well casing centralizer coupling is provided. The casing centralizer coupling is constructed to be suitable for coupling well casing for use in drilling with casing operations. The casing centralizer coupling includes a body having a number of centralizing blades arranged radially around an exterior surface of the body for contacting an inner surface of a well bore to centralize the well casing. Each centralizing blade includes a transverse profile that results in the blade having a reduced contact with the well bore and includes a hard faced contact surface. A method of constructing the well casing centralizer coupling to have a number of centralizing blades with such a transverse profile and a hard faced surface is also provided.
Claims32
A well casing centralizer comprising:
- a body having a threaded first end, a threaded second end, a through bore extending from said first end to said second end, and an exterior surface;
- a plurality of centralizing blades projection outwardly and extending along a length of said exterior surface;
- each of said plurality of centralizing blades defining an outwardly facing surface having an arcuately shaped transverse cross section, opposed outwardly beveled transverse edges and opposed outwardly beveled longitudinal edges;
- and
- wherein at least said outwardly facing surface is hard faced.
A combined casing coupling and casing centralizer, comprising:
- a body having a threaded first end, a threaded second end, a through bore extending from said first end to said second end, and an exterior surface;
- at least one centralizing blade projection outwardly and extending along a length of said exterior surface;
- and
- each of said plurality of centralizing blades defining an outwardly facing surface having an arcuately shaped transverse cross section.
A method of making a combined casing coupling and casing centralizer including the steps of:
- attaching at least one centralizing blade core to a casing coupling by pulse arc GMAW welding such that opposed outwardly beveled transverse edges and opposed outwardly beveled longitudinal edges are formed along the perimeter of said at least one centralizing blade core;
- and
- hard facing an outward facing surface of said at least one centralizing blade core.
Dependencies are inferred from the claim text.