Inventor

SANGESLAND SIGBJORN

NO5 patents

⚠️ This page may combine multiple inventors who share the name “SANGESLAND SIGBJORN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OCEAN RISER SYSTEMS AS

1 patent

US7367410B2May 6, 2008

Method and device for liner system

OCEAN RISER SYSTEMS AS58 citations94

(unassigned)

1 patent

US5368114ANov 29, 1994

Under-reaming tool for boreholes

188 citations92

NORSK HYDRO AS

1 patent

US5404953AApr 11, 1995

Blow-out prevention device for shutting off an annulus between a drill column and a well wall when drilling for oil or gas

NORSK HYDRO AS24 citations90

FOSSLI BORRE

1 patent

US8978774B2Mar 17, 2015

System and method for drilling a subsea well

FOSSLI BORRE19 citations81

HEAVELOCK AS

1 patent

US10156105B2Dec 18, 2018

Drill apparatus for a floating drill rig

HEAVELOCK AS1 citations35