Surface Test Tree (Flowhead)

A surface test tree, also called a flowhead, is a valve assembly mounted at the top of the wellhead that controls and directs wellbore flow during well testing, workover, and production operations. It provides the operator with the ability to open and close the well, divert flow to test equipment or production facilities, and maintain well control at surface during critical phases of the well lifecycle. M&M Oil Tools' surface test trees are manufactured at an API Q-1 licensed facility in Breaux Bridge, Louisiana, with full material traceability on every unit.

A wellhead is the permanent structural and pressure-containing assembly installed at surface to support the casing strings and provide the foundation for production equipment. A surface test tree is a temporary or semi-permanent valve assembly that sits on top of the wellhead to control flow during well testing, workover, or early production - it is an operational tool, not a structural component. The surface test tree is typically removed once permanent production equipment is installed or the workover operation is complete, while the wellhead remains in place for the life of the well.

A surface test tree is required any time you need to control, measure, or divert wellbore flow at surface during a well testing or workover program. Common applications include drill stem testing (DST), production testing, tubing pulls, stimulation treatments, re-perforations, and plug-and-abandon operations where the well may be live. They are also used as temporary production equipment during early production phases before permanent surface facilities are in place. Any operation where a live wellbore requires surface flow control and pressure management will typically require a surface test tree configuration.