Riser braking clamp apparatus

Patent · Tue Oct 14 04:00:00 EDT 1986

OSTI ID:5124515

Langer, C G

A riser breaking clamp apparatus is described for use in a floating vessel having a substantially centrally positioned vertical hull opening therethrough. The vessel is provided with well drilling equipment, including an elongated vertical riser. The riser extends in tension down through the hull opening to a point adjacent the ocean floor, and motion-compensating and tensioning means are carried by the vessel operatively connected to the riser for tensioning the riser during normal operations. The invention comprises: riser braking clamp apparatus located substantially within the hull opening through the vessel, the riser braking clamp apparatus comprising: telescopic joint means having a first member and a second member, each member having a lower end and an upper end and axial throughbore, the lower end of the first member operatively connected to the upper end of the riser. The upper end of the first member is slideably engaged with the lower end of the second member, the second member operatively connected to the vessel; and brake means carried by one member of the telescopic joint means, operatively and selectively engageable with the other member of the telescopic joint means, to dampen, arrest, and prevent further movement of the first member relative to the second member of the telescopic joint means.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4616707
• OSTI ID: 5124515
• 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-)
DRILLING EQUIPMENT
EQUIPMENT
FASTENERS
JOINTS
MARINE RISERS
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
PIPE JOINTS
PIPES
POSITIONING
SEA BED
STRAINS
WELLS