Apparatus for, and method of, landing items at a well location

Wells – Processes – Placing or shifting well part

Reexamination Certificate

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Details

C166S077100, C166S077530, C166S085100, C166S368000, C166S380000, C175S203000

Reexamination Certificate

active

07025147

ABSTRACT:
An apparatus for, and method of, lowering items from a drilling rig to a well located below it. One embodiment includes the use of a landing string comprised of drill pipe having an enlarged diameter section with a shoulder along with upper and lower holders having wedge members also with shoulders that engage and support the drill pipe at the shoulder of the enlarged diameter section. In this embodiment the drill pipe and wedge members can be rotatable with respect to each other.

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A.T. Bourgoyne, Jr., et al., “Applied Drilling Engineering,” 1991 (more than 9 years earlier than the effective filing date of the captioned application), vol. 2, p. 19, published by Society of Petroleum Engineers.

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