Riser angle control apparatus and method

Patent · Tue Mar 18 04:00:00 EST 1986

OSTI ID:5719278

Dension, E B

A riser angle control apparatus and method is described for use with a floating vessel having well drilling equipment, including an elongated riser having upper elements connected to the floating vessel by vessel connection means, and first flexible coupling means located adjacent the vessel connection means, the riser extending down from the vessel connection means to a point adjacent the ocean floor. The improvement described here consists of riser angle control apparatus comprising: second flexible coupling means operatively engaged with a portion of the upper elements of the riser below the first flexible coupling means, liquid phase of the pumpable waste or increase the specific gravity thereof; and adsorbents, in order to minimize convergence of the salt cavern by narrowing the difference between the specific gravity of the salt cavern walls and the specific gravity of the liquid phase of the pumpable waste by converting the liquid phase to a paste-like or solid consistency.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4576516
• OSTI ID: 5719278
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
CONTROL EQUIPMENT
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FLEXIBILITY
INCIDENCE ANGLE
MARINE RISERS
MECHANICAL PROPERTIES
NATURAL GAS WELLS
OFFSHORE DRILLING
OFFSHORE PLATFORMS
OIL WELLS
PIPES
SEA BED
SHIPS
TENSILE PROPERTIES
WELLS