TUBULAR DRILL FOR MOUNTING SEPARATING BRIDGES IN THE WELL Russian patent published in 2004 - IPC

FIELD: oil and gas extracting industry. SUBSTANCE: device has body, compacting member, fixing member and disengaging means. Upper and lower technological apertures are made in the body. Centering means is provided in the lower part of body. Axially moveable stop is placed on the body with spring centering means and ring-shaped recess on its inner surface. Compacting member additionally has spring limiter and outer ring-shaped groove. Axial movement of the compacting member limits the fixing member. Fixing member has moveable fixing elements and outer raiser. Said elements are inserted into lower technological apertures of the body and interact with outer ring- shaped groove of compacting element. Outer raiser is axially moveably mounted on the body and interacts with moveable fixing elements by means of its inner surface of variable cross-section. Outer raiser is fixed relative to the body by means of locking element. Disengaging means having stoppers and an inner raiser blocks axial movement of the stop. Stoppers are inserted into upper technological apertures of the body. Stoppers interact with ring-shaped recess of stop from the outside, and with outer surface of inner raiser from the inside. Inner raiser is fixed relatively to the body by a fixing member. Outer surface of raiser has a variable cross-section. EFFECT: simple preparation of device for operation and guaranteed placement of separating bridge strictly within needed range without any downward displacement. 1 dwg