Guilelineless subsea completion system with horizontal flowline connection

Patent · Tue Dec 16 00:00:00 EST 1986

OSTI ID:6884703

Baugh, B F

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; NOV-87-039436; EDB-87-029150
• Patent Number(s): US 4629003
• OSTI ID: 6884703
• Resource Relation: Patent File Date: Filed date 1 Aug 1985
• Country of Publication: United States
• Language: English

Related Subjects

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