Patent ID: 9546517
Date: 2017-01-17
CPC Classifications: E21B

Claim:
1. A method of foaming a wellbore in a subterranean formation comprising: a. providing a tubular string comprising tubular segments, and connectors axially adjoining adjacent segments that are selectively changeable between an unlocked configuration where the adjacent segments are rotatable with respect to one another and a locked configuration where the adjacent segments are rotationally affixed to one another; b. changing connectors from the unlocked configuration to the locked configuration to form a substantially rotationally cohesive portion of the tubular string and that comprises connectors that are in the locked configuration; c. inserting the substantially rotationally cohesive portion of the tubular string in the wellbore; and d. rotating the substantially rotationally cohesive portion of the tubular string, so that when a drill bit is provided on an end of the tubular string, cuttings are removed from the subterranean formation to create the wellbore e. exerting a downward force onto the tubular string to urge the tubular string deeper into the wellbore so that a one of the connectors is above an opening of the wellbore, temporarily suspending rotation of the rotationally cohesive portion of the tubular string, changing the one of the connectors from an unlocked to a locked configuration so that tubular segments adjacent to and above and below the one of the connectors are put into a rotationally cohesive configuration, and resuming rotation of the rotationally cohesive portion of the tubular string.