DEVICE AND METHOD FOR STABILIZATION OF ONE-COLUMN BASE AND DRILLING FROM IT AT SEA Russian patent published in 2005 - IPC

FIELD: sea wells drilling technologies.

SUBSTANCE: method includes placing lower portion of one-column base at necessary depth in sea bottom soil and placing links on base, preventing its bending, mounting drilling mechanisms at upper end of one-column base, lowering drilling body into it, drilling the well and raising drilling body, prior to drilling from one-column base, being the main one-column base, additionally to main one-column base two auxiliary one-column bases are placed in soil, main and auxiliary bases are connected by rigid links in horizontal plane, forming a closed triangle. Main and auxiliary one-column bases are placed in adjacent points for planned wells of rhombic deposits network. Stabilization device has one-column base made of connected pipe elements, and links applied to transverse sections of one-column base and preventing its bending. Lower end of one-column base is placed in sea bottom soil at necessary depth derived from soil-mounting hardness condition, and its upper end is high above sea level at height, inaccessible for waves, and a platform with drilling mechanisms is mounted thereupon. One-column base, being the main one, is additionally provided with two auxiliary one-column bases placed in soil, connected to main one-column base in horizontal plane by rigid links made in form of guy-wires of adjustable length, forming a closed even-sided triangle. Each guy-wire is provided with rigidly mounted binders at ends, which are placed on main and auxiliary bases and fixed thereon below the platform with drilling mechanisms.

EFFECT: higher stability, durability and reliability.

2 cl, 3 dwg