UNIONS

Brand	Owner	Address	Description
WECO	FMC CORPORATION	2929 Walnut Street Philadelphia PA 19104	UNIONS, THREAD PROTECTORS FOR UNIONS, GAUGE COCKS, CLAMP HANDLES, AND PLUG VALVES;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A hybrid wellhead system is assembled using a plurality of threaded unions, such as spanner nuts or hammer unions, for securing respective tubular heads and a flanged connection for securing a flow control stack to a top of a tubing head spool. The tubing head spool is secured by a threaded union to an intermediate head spool. The intermediate head spool is secured by another threaded union to a wellhead. Each tubular head secures and suspends a tubular string in the well bore. The hybrid wellhead system is capable of withstanding higher fluid pressures than a conventional independent screwed wellhead, while providing a more economical alternative to a flanged, or ranged, wellhead system because it is less expensive to construct and faster to assemble.