Boring or penetrating the earth – Boring a submerged formation – Boring from submerged buoyant support
Patent
1997-10-01
1999-12-14
Tsay, Frank
Boring or penetrating the earth
Boring a submerged formation
Boring from submerged buoyant support
166350, 4051951, E21B 7128
Patent
active
060004800
ABSTRACT:
The present invention relates to an arrangement in connection with the drilling of oil wells, especially with coil tubing, and more specifically an arrangement comprising heave compensation by such drilling, comprising a first frame-like structure (3) which in relation to a floating vessel (1A) is mounted for allowing movement at least in the vertical direction in relation to said vessel, as well as devices for providing compensating power between said first frame stucture (3) and said vessel (1A), and in order to provide an improved heave compensation system it is according to the present invention suggested that said arrangement further comprising a second frame-like structure (1) arranged stationary on the deck (1AA) of the vessel (1A), said first compensated frame-like structure (3) and said second frame-like structure (1) being assembled by means of a further system (4) allowing compensation of said relative movement between the vessel (1A) and said compensated structure (3), i.e. heave compensation both in relation to said vessel (1A) and said first frame structure (3).
REFERENCES:
patent: 3797256 (1974-03-01), Giblon
patent: 3804369 (1974-04-01), Sutton
patent: 4427319 (1984-01-01), Mayr
patent: 4437792 (1984-03-01), Durand et al.
patent: 4616707 (1986-10-01), Langner
patent: 5671811 (1997-09-01), Head
Mercur Slimhole Drilling Intervention AS
Tsay Frank
LandOfFree
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