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Guilelineless subsea completion system with horizontal flowline connection

Patent ·
OSTI ID:6884703

This patent describes a subsea completion system for the production of oil or gas from subsurface formations or the injection of liquids or gases into subsurface formation, a wellhead and landing base system supporting casing and tubing in a well bore and having a flowline receiving structure attached. A Christmas tree assembly of valves, tree flow loop portion, and fittings are adapted to be lowered thru the ocean and landed on the wellhead and landing base system without the pre-orientation and guidance of guidelines from the surface of the water to the wellhead and landing base system and subsequently to be rotated to a preferred orientation. Flowlines are along the sea floor. The invention described here comprises: a subsea flowline connector comprising a sea floor flowline end connector and a tree flowline end connector, the sea floor end connector being adapted for installation on the end of the flowlines before the flowlines are laid on the ocean floor and adapted for being landed in the flowline receiving structure portion of the wellhead and landing base system. This is done in such a way so that the ports therethrough which communicate with the bores of the flowlines and the flowlines are substantially horizontal and such that the minimum distance from the center of the wellhead and landing base system to the sea floor end connector is a first radial distance.

Assignee:
NOV; EDB-87-029150; NOV-87-039436
Patent Number(s):
US 4629003
OSTI ID:
6884703
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
CONDUCTOR DEVICES
CONNECTORS
CONTROL EQUIPMENT
DRILL PIPES
DRILLING EQUIPMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID INJECTION
GAS INJECTION
HOISTING
MARINE RISERS
MATERIALS HANDLING
MOTION
NATURAL GAS WELLS
OIL WELLS
ORIENTATION
PIPE FITTINGS
PIPES
ROTATION
SEA BED
SEAS
SURFACE WATERS
VALVES
WELL COMPLETION
WELLHEADS
WELLS