What are the components of a wellhead?
Generally, the wellhead consists of three components: (1) the casing head, (2) the tubing head, and (3) the Christmas tree. The casing head consists of heavy fittings that provide a seal between the casing and the surface.
What is wellhead system?
Wellhead systems serve as the termination point of casing and tubing strings. As such, these systems control pressure and provide access to the main bore of the casing or tubing or to the annulus.
What is wellhead assembly?
The wellhead assembly consists mainly of casing head, tubing head, and Christmas tree. It is mainly used for hanging tubing string and sealing tubing string and tubing-casing annulus. The tubinghead is installed between the Christmas tree and the casinghead.
What are the functions of wellhead?
Wellhead Functions A well head provides means for suspension of casing strings running down the wellbore. A Blow Out Preventer (BOP) acts to cope up with erratic fluctuations of pressure and flow from reservoir. Wellhead serves as attachment point for the Blowout Preventers.
What is the first component installed on wellhead?
State-of-the-art of drilling It provides annular outlets, as well as supporting the BOP while drilling the remaining stages. Casing head is generally the first component to be installed after the casing has been set.
What is wellhead Control Panel?
Performing a safety critical function on manned and unmanned platforms, our Wellhead Control Panels (WHCPs) are designed for monitoring, controlling and shutdown of various subsurface and surface valves.
How many types of wellheads are there?
Oil and gas well wellhead equipment can be divided into three types: flowing well wellhead equipment, pumping well wellhead equipment and gas well wellhead equipment.
What is choke valve in wellhead?
A choke valve is a mechanical device that induces restriction in a flow line, causing either a pressure drop or a reduction in the rate of flow. See Figure 1. In the context of the upstream oil and gas industry, choke valves are used wherever there is a requirement for wellhead flow and pressure control.
What is SSV valve?
The Well Test Surface Safety Valve (SSV) is a hydraulically or pneumatically actuated, fail-safe gate valve installed upstream of the choke manifold. The SSV includes an emergency shutdown (ESD) function.
How does SSV valve work?
The Cameron safety shutdown valve (SSV) control system provides fail-safe shutdown of flow when pressure in the flowline falls outside a preset range. In the event of hydraulic control line pressure loss, the valve moves to the fail-safe position.
Where is wellhead located?
Locate the wellhead in your yard. This is the top of your well. There should be cap or seal on the top of the casing (pipe) that should extend at least twelve inches above the ground to keep contaminants from entering the system. Soil should slope away from the wellhead so surface water doesn’t puddle.
