FULL OPENING WELLHEAD WITH RETRACTILE SEAT

A full opening, through bore, well casing head with a retractile split-ring seat that facilitates running maximum size downhole tools through the upper access opening of the casing head during drilling operations. The seat is inherently biased towards its contracted condition wherein it extends into...

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Bibliographic Details
Main Author MARTIN, DON L
Format Patent
LanguageEnglish
Published 16.08.1977
Subjects
BLASTING
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ENGINEERING ELEMENTS AND UNITS
FIXED CONSTRUCTIONS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
JOINTS OR FITTINGS FOR PIPES
LIGHTING
MEANS FOR THERMAL INSULATION IN GENERAL
MECHANICAL ENGINEERING
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PIPES
SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:A full opening, through bore, well casing head with a retractile split-ring seat that facilitates running maximum size downhole tools through the upper access opening of the casing head during drilling operations. The seat is inherently biased towards its contracted condition wherein it extends into the head's bore in functional position, and is retracted from the bore into an annular recess in the head by rotation of a cam element located between the opposed ends of the seat where it is split.
Bibliography:Application Number: CA19740211778