WELL FLOW CONTROLLING METHOD, APPARATUS AND SYSTEM

摘要

A method, apparatus, and system for controlling flow of well fluids from a well in response to sensing of a leak in the connections between the components of the well head or fire at the well head for closing off all flow from the well upon the occurrence of such condition. Encompassed is modification of existing installations to carry out the method with a minimum of added equipment or well work-over. Sensing mechanisms responsive to leakage between adjacent connected components of the well head for actuating the closure and responsive to heat from fires at the well head are disclosed. The method, apparatus and system are adapted for multiple string installations and for new installations without modification. The system is also adapted for use with down-hole flow control devices in the well flow conductor.