VALVE ASSEMBLY OF REMOVABLE ANCHOR LATCH

FIELD: oil and gas industry. ^ SUBSTANCE: invention refers to drilling devices from casing pipe of multidirectional oil and gas branch holes, specifically to fixing and pulling devices for standoff anchor latch from casing pipe. Valve device contains pipe partition, body, seat, detent valve and shear pin. Receiving chamber is mounted over the pipe partition whereto the valve body with holed bush to connect to anchor latch cavity is attached from below. The body contains pushed pipe junction attached to the hollow tension bar and designed as an assembly with the seat. The valve represents an assembly with the rod. Anchor latch is fixed due to design excess pressure within its cavity enabled by pumping-in liquid in pipe drills and open valve. After the valve is closed and removed from the body, passage of anchor latch and receiving chamber cavities is open to ensure liquid flow under pressure difference. It results in decreased external diameter of shaped tube and loosening of anchor latch and casing pipe. ^ EFFECT: more reliable flow and liquid pressure control within cavity of removed anchor latch. ^ 1 dwg