Patent ID: 11953122
Assignee: HYDRIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC F  E | IPC F

Claim 6:
7. A method comprising:
moving a first expandable tubular member relative to a second expandable tubular member, such that a pin end of the first expandable tubular member enters and axially overlaps with a box end of the second expandable tubular member;
rotating the first expandable tubular member relative to the second expandable tubular member, such that a first threading on the first expandable tubular member engages with a second threading on the second expandable tubular member;
connecting the first expandable tubular member to the second expandable tubular member in a first position, such that a length of box threading of the box end substantially covers a length of pin threading of the pin end,
wherein the pin threading comprises pin crests and pin roots that are substantially axial to the first expandable tubular member, each separated by pin flanks that are substantially radial to the first expandable tubular member and the box threading comprises box crests and box roots that are substantially axial to the second expandable tubular member, each separated by box flanks that are substantially radial to the second expandable tubular member,
wherein a first expansion space is formed between load flanks of the pin and box once the first and second expandable tubular members are connected in the first position and a first pin flank and a second pin flank of the pin flanks define a first groove of the first expandable tubular member with a first clearance width, and a third pin flank and a fourth pin flank of the pin flanks define a second groove of the first expandable tubular member with a second clearance width, and the first clearance width and the second clearance width are substantially similar, and
wherein the pin crests abut the box roots and the pin roots abut the box crests.