A pipehead is a mechanical fitting on the lower section of a wellhead above the liner holder and spool, with a profiled internal surface for the hose hook. The Christmas tree is attached to the top of the pipehead, and the wellhead assembly consists of the pipe head, hanger section, and Christmas tree. The pipehead supports and seals the pipe conduit and features multiple ports for valves and tools. Design and construction may vary based on well specifications.
A pipehead is a mechanical fitting used on the wellhead structures of crude oil wells. It is typically found in the lower section of the wellhead above the liner holder and liner spool. The head features a profiled internal surface designed to accommodate the hose hook which supports and seals the hose conduit. The top section of the wellhead assembly is known as the Christmas tree and is attached to the top of the pipehead by means of a specially designed head adapter. The head is usually equipped with multiple ports for the inclusion of various valves and tools.
A wellhead is the surface termination arrangement of an underground crude oil well. This assembly typically consists of two multi-part sections, namely the pipe head and hook section of the casing and Christmas tree. The hanger section is designed to hold the casing and pipe strings, to terminate the well during the construction phase, and to support the Christmas tree during production. The Christmas tree is a complex arrangement of valves, coils, and tools so named for its distinctive cluttered cross shape. Its function is to control and monitor the well and its production during the production phase.
The pipehead is one of the units that make up the lower section of the wellhead assembly. It is usually the upper unit of the assembly to which the Christmas tree is mounted thanks to a specially designed adapter. Located within the profiled interior of the main unit is the hose hanger. The function of these two units is to support and seal the pipe conduit, or rope. This is the length of pipe that goes down the well inside the outer casing. The jacket support and coil units are located under the tube head and support the outer jacket.
The tube support function of the header is achieved by locking bosses along the top of the unit and the profiled inner surface of the tube hanger. The hook ensures that the pipe is hydraulically isolated from the ring, or space, between it and the outer shell of the well. The hose head also features several ports and fittings used to connect a variety of valves and diagnostic tools. While the basic design of most pipeheads is similar, well specifications may dictate some design and construction starts with varying concentrations of certain chemicals and pressure levels requiring adjustments to the materials and characteristics of the units.
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