SET TO DRIVE HOLES IN BOTTOM SEDIMENTATION Russian patent published in 2002 - IPC

FIELD: drilling of sedimentation rock on shelf. SUBSTANCE: set to drive holes in bottom sedimentation includes hydraulic monitor drill, flexible armored hose, pumping equipment, pulling winch, anchor-jig coming in the form of conical bushing. Upper part of central passage of bushing has diameter smaller than lower part. Flexible armored hose with rupture strength securing running of sinking-lifting operations with set is freely passed through passage. Hydraulic monitor drill and flexible armored hose are hydraulically intercoupled via adapter whose diameter is smaller than diameter of lower part of central passage of bushing but is larger than diameter of upper part. Besides that flange of preferably triangular section is mounted over perimeter of major base of anchor-jig. Body of anchor-jig is provided with ring space housing non-return valve. Surface of upper face part of central passage is spherical with curvature radius not less than curvature radius of flexible armored hose bent by own weight. This surface is rough with orientation of projections along perimeter of anchor-jig. Pumping equipment and pulling winch to reel out and up flexible armored hose are located on base vessel. EFFECT: simplified design of set, protection of section close to well- head against destruction. 3 cl, 4 dwg