초록 ▼

A means of sealing a multipath, multipass swivel whereby that part of the structure housing the seal element deflects under pressure to compensate for the overall structural deflections, such that a constant seal gap is maintained. A means of lubricating and flushing seal surfaces is also disclosed

A means of sealing a multipath, multipass swivel whereby that part of the structure housing the seal element deflects under pressure to compensate for the overall structural deflections, such that a constant seal gap is maintained. A means of lubricating and flushing seal surfaces is also disclosed whereby a controlled liquid is injected between two seals at a higher pressure than the production fluid such that the seal between the injected liquid and the production fluid is less capable than the seal between the controlled liquid and ambient.

대표청구항 ▼

In a multi-path multi-pass swivel, a fluid swivel assembly comprising a central cylindrical member having an exterior cylindrical surface, a central bore, an essentially radially outwardly opening exit port and an annular ring surrounding said cylindrical member; said annular ring having an annular

In a multi-path multi-pass swivel, a fluid swivel assembly comprising a central cylindrical member having an exterior cylindrical surface, a central bore, an essentially radially outwardly opening exit port and an annular ring surrounding said cylindrical member; said annular ring having an annular groove adapted to register with said exit port, and an outlet port on the exterior of said annular ring; said annular ring communicating with said outlet port on the exterior of said annular ring; and cylindrical radially inner lip surfaces to each side of said groove and sealed against said exterior cylindrical surface of said cylindrical member by at least two axially spaced apart seals; and including means for introducing a fluid under pressure between said two seals at a higher pressure than fluid in the bore; said two seals being such that in such conditions, the fluid interconnected between the seals passes more easily across the seal to the annular groove than across the other of the two seals.