Patent ID: 7469742
Filing Date: 2008-12-30
Classification: E21B

Abstract:
1. A method of preventing vent gas flows in the annulus region of a gas well having a well head, the method comprising: a. positioning a primary seal over a casing bowl of a gas well head, b. providing an inner seal member to engage and seal the surface of an interior casing of the well, c. providing a second seal to sealingly engage the casing bowl to provide a substantially hermetically sealed chamber defined by the inner surface of a well bore and the outer surface of the interior casing, d. providing an adjustable fastening system operatively configured to attach the primary seal to well heads of varying outer diameters by way of substantially radially repositionable fasteners; e. providing pressure through an existing casing bowl vent to pressurize the annulus region, thereby inhibiting the flow of gas from a lower portion in the annulus to prevent the formation of vent gas flows through the annulus while an uncured cement contained therein is still in a formable state.