Iranian Knowledge-Based Company Exports Oil Wellhead to Oman
“Wellhead refers to a set of equipment that are installed on the surface of the oil well after the completion of the well and before moving the drilling rig, and they have different tasks,” said Amir Mehdi Javaherdashti, the managing director of the knowledge-based company.
“Maintenance of wall pipes and casing is one of the tasks of the wellhead, which protects the wall pipes and casing against the pressure of the fluids inside the well. The wellhead helps to control the pressure of fluids inside the well, including oil, gas and water, and provides access to the inside of the well to perform various operations, like repairs or equipment installation,” he added.
Javaherdashti explained that the wellhead directs and controls the flow of fluids coming out of the well, adding, “One of the important challenges in working with well equipment is managing the high pressure of fluids inside the well, and this pressure can be so high that it brings significant safety risks.”
“For this reason, the design, construction and installation of well equipment should be done with the highest quality and safety standards,” he underlined.
“In one of the export experiences, the Omanis did not believe that our product was made in Iran after observing its high quality and comparing it with the US-made sample,” Javaherdashti said.
A wellhead is the component at the surface of an oil or gas well that provides the structural and pressure-containing interface for the drilling and production equipment.
The primary purpose of a wellhead is to provide the suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment.
While drilling the oil well, surface pressure control is provided by a blowout preventer (BOP). If the pressure is not contained during drilling operations by the column of drilling fluid, casings, wellhead, and BOP, a well blowout could occur.
When the well has been drilled, it is completed to provide an interface with the reservoir rock and a tubular conduit for the well fluids. The surface pressure control is provided by a Christmas tree, which is installed on top of the wellhead, with isolation valves and choke equipment to control the flow of well fluids during production.
Wellheads are typically welded onto the first string of casing, which has been cemented in place during drilling operations, to form an integral structure of the well. In exploration wells that are later abandoned, the wellhead may be recovered for refurbishment and re-use.
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