Torque transmitting load shoulder
AssigneeTesco Corporation
InventorPer G. Angman
Life of this patent
Estimating the term…
Abstract
A well drilling tool has a tubular member connected into a casing string that serves as a drill string. A load shoulder is located within the bore of the tubular member. The load shoulder has a torque transferring portion that extends from a lower terminus to an upper terminus. The load shoulder has an axial force transferring portion that faces upward. A bottom hole assembly is lowered through the casing string and lands on the load shoulder. The bottom hole assembly has a mating profile to the load shoulder so that it will be supported by the load shoulder and will receive torque transferred from the load shoulder.
Claims20
A well apparatus for performing casing while drilling, comprising:
- a tubular member having a bore, a longitudinal axis, and an upper end for connection to a casing string;
- a load shoulder within the bore;
- the load shoulder having a torque transferring portion extending from a lower terminus to an upper terminus;
- the load shoulder having an axial force transferring portion that faces upward;
- a bottom hole assembly for lowering through the casing string, the bottom hole assembly having a profile that lands on the load shoulder;
- the profile having a torque transferring portion that mates in flush contact with the torque transferring portion of the load shoulder so that torque imposed on the casing string transfers to the bottom hole assembly;
- and
- the profile having an axial load transferring portion that mates in flush contact with the axial load transferring portion of the load shoulder for transferring weight of the bottom hole assembly to the casing string.
A well apparatus, comprising:
- a tubular member for location in a wellbore, the tubular member having a bore;
- a load shoulder within the bore;
- the load shoulder having a torque transferring portion extending upward from a lower terminus to an upper terminus, the torque transferring portion facing generally into a selected rotational direction relative to an axis of the tubular member;
- and
- the load shoulder having an axial force transferring portion that extends along a helical angle around the axis from the lower terminus to the upper terminus.
A method of drilling with a casing string, comprising:
- (a) providing a tubular member with an internal load shoulder having a torque transferring portion and an axial force transferring portion;
- (b) connecting the tubular member to the casing string;
- (c) providing a bottom hole assembly with a drill bit and a profile having a torque transferring portion and an axial force transferring portion;
- (d) lowering the bottom hole assembly into the casing string and landing the profile on the load shoulder with the drill bit protruding past a lower end of the casing string;
- (e) transferring weight of the bottom hole assembly from the axial force transferring portion of the profile to the axial load transferring portion of the load shoulder;
- and
- (f) rotating the casing string and transferring torque from the casing string through the torque transferring portion of the load shoulder to the torque transferring portion of the profile to cause the bottom hole assembly to rotate.
Dependencies are inferred from the claim text.