초록 ▼

A locking telescoping joint is for use in a conduit connected to a wellhead, which permits the conduit to be axially displaced to a new position in the well bore without disconnecting the conduit from the wellhead, and secured in the new position. The locking telescoping joint includes two telescopi

A locking telescoping joint is for use in a conduit connected to a wellhead, which permits the conduit to be axially displaced to a new position in the well bore without disconnecting the conduit from the wellhead, and secured in the new position. The locking telescoping joint includes two telescopically interconnected tubular sections which are relatively movable between a fully retracted and a fully extended position and can be locked in a desired position. In contrast with telescoping joints without the locking function which is useful to axially display downhole tools attached to the bottom end of the conduit. The locking telescoping joint enables the use of the telescoping joint to be extended into new applications, such as placing and maintaining a tubing string in tension or compression. The use of the locking telescoping joint reduces the time and cost of many well completion and maintenance operations and thereby reduces the cost of producing hydrocarbons.

대표청구항 ▼

1. A locking telescoping joint for use in a conduit connected to a wellhead, comprising:first and second telescopingly interconnected tubular sections having opposite ends adapted for connection to the conduit, the telescopically interconnected tubular sections being movable relative to each other f

1. A locking telescoping joint for use in a conduit connected to a wellhead, comprising:first and second telescopingly interconnected tubular sections having opposite ends adapted for connection to the conduit, the telescopically interconnected tubular sections being movable relative to each other from a fully retracted to a fully extended position, the second tubular section being freely rotatable with respect to the first tubular section in at least one position to permit rotary manipulation of downhole components; and a latch assembly for releasably locking the first and second tubular sections at a plurality of latch points disposed along a travel length of the telescoping joint between the fully retracted and the fully extended positions, and the latch assembly being adapted to prevent the second tubular section from being completely withdrawn from the first tubular section within which it reciprocates.