MULTI-STAGE SEAL FOR WELL FRACTURING

摘要

A fracturing system including a ring gasket disposed between a fracturing tree and a wellhead component is provided. In one embodiment, the ring gasket includes multiple sealing stages that seal against grooves in the fracturing tree and the wellhead component. The ring gasket may also include one or more recesses between the sealing stages. In some embodiments, the ring gasket has a configuration that reduces gasket setting load and increases flange separation load compared to other gaskets used in fracturing operations. And in some embodiments, the system enables monitoring of gasket sealing integrity, even during fracturing operations. Additional systems, devices, and methods are also disclosed.

主权项

1. A well-fracturing system comprising:
a wellhead component including a sealing groove; a fracturing tree coupled to the wellhead component such that the sealing groove of the wellhead component is aligned with an additional sealing groove of the fracturing tree; and a ring gasket disposed between the wellhead component and the fracturing tree within the sealing groove and the additional sealing groove, wherein the ring gasket is a multi-stage sealing gasket including:
a first sealing stage in the form of an outer end of the multi-stage sealing gasket having surfaces that seal against the sealing groove and the additional sealing groove, respectively;a second sealing stage in the form of an inner end of the multi-stage sealing gasket having surfaces that seal against the sealing groove and the additional sealing groove, respectively; anda recess in a surface of the multi-stage sealing gasket between the first and second sealing stages.