Valve body for oilfield applications
AssigneeMASX Energy Services Group, Inc.
InventorsThomas F. Bailey, John E. Campbell
Life of this patent
Estimating the term…
Abstract
A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the valve head. A urethane valve insert may also be provided to facilitate sealing engagement with the valve seat. The urethane legs reduce the overall weight of the valve to reduce the mass of the pumping valve against the valve seat thereby extending the life of the valve. The valve legs are attached to the valve head through fitting engagement and can be replaced and/or repaired.
Claims16
A valve to pump fluids, said valve sealingly cooperating with a valve seat having a throughbore, said valve comprising:
- a valve head having an internal cavity;
- a valve body attached to said valve head, said valve body having a neck portion received within said cavity of said valve head;
- and
- means to lockingly attach said valve body to said valve head, said valve head being made of a metal material and said valve body being made of an elastomer material, said locking means includes cooperating thread forms on said neck portion of said valve body and within said cavity of said valve head thereby preventing inadvertent separation of said valve body from said valve head.
In a valve assembly used in downhole applications for the pumping of fluids, the valve assembly including a valve seat having a through bore and a valve received by the valve set to selectively close the throughbore, the improved valve comprising:
- a valve head having an annular cavity;
- and
- a valve body having an annular neck lockingly received within said annular cavity to attach said valve body to said valve head, said annular neck having a continuous thread form cooperating with a continuous thread groove in said annular cavity to threadably attach said valve body to said valve head, said thread form and thread groove having a semi-circular cross-sectional configuration.
In a valve assembly used in downhole application for the pumping of fluids, the valve assembly including a valve seat having a throughbore and a valve received by the valve set to selectively close the throughbore, the improved valve comprising:
- a valve head made of a metal material, said valve head having an annular cavity;
- a valve body made of an elastomer material, said valve body having an annular neck received within said annular cavity to attach said valve head to said valve body;
- and
- means to lockingly attach said valve head to said valve body to prevent inadvertent separation of said valve head from said valve body, said means including at least one continuous thread formed in the inner annular surface of said annular cavity of said valve head and of at least one corresponding mating thread formed on the outer annular surface of said annular neck of said valve body, said annular neck threadably engaging said annular cavity to secure said valve body to said valve head, said annular neck including a terminal annular thread form to prevent further threading engagement of said annular neck into said annular cavity.
Dependencies are inferred from the claim text.