There are various Pressure Control equipment used during well intervention and workover operations such as:
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Wireline Pressure Control Equipment
Coiled Tubing Pressure Control Equipment
Manual wireline valve
Hydraulic wireline valve
Dual wireline valve
Control head
Wellhead Flange
Flow Tee (High & Low Pressure)
Fluid Chamber
Hand Unions
Stuffing Box
Tool Catcher
Wellhead Swedges
All these equipment are manufactured as per international standards and meets API 6A specifications.
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.
Wellhead gas storage, Etzel Germany Oil well Christmas Tree
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.[1]
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.
Offshore, where a wellhead is located on the production platform it is called a surface wellhead, and if located beneath the water then it is referred to as a subsea wellhead or mudline wellhead.[2][3][4][5]
Components
The primary components of a wellhead system are:
casing head
casing spools
casing hangers
choke manifold
Contact us to discuss your requirements of Oil Gas Wellhead Equipment. Our experienced sales team can help you identify the options that best suit your needs.
packoffs (isolation) seals
test plugs
mudline suspension systems
tubing heads
tubing hangers
tubing head adapter
Functions
A wellhead serves numerous functions, some of which are:
Provide a means of casing suspension (Casing is the permanently installed pipe used to line the well hole for pressure containment and collapse prevention during the drilling phase).
Provides a means of tubing suspension (Tubing is removable pipe installed in the well through which well fluids pass).
Provides a means of pressure sealing and isolation between casing at surface when many casing strings are used.
Provides pressure monitoring and pumping access to annuli between the different casing/tubing strings.
Provides a means of attaching a blowout preventer during drilling.
Provides a means of attaching a Christmas tree for production operations.
Provides a reliable means of well access.
Provides a means of attaching a well pump,
Design specification
The oil industry specifications for wellhead systems (materials, dimensions, test procedures and pressure ratings etc.) are :
API 6A, 20th Edition, October ; Specification for Wellhead and Christmas Tree Equipment
ISO : Wellhead and Christmas Tree Equipment
In general well heads are five nominal ratings of wellheads: 2, 3, 5, 10 and 15 (×) psi working pressure. They have an operating temperature range of &#;50 to +250 degrees Fahrenheit. They are used in conjunction with ring type seal gaskets.
In general the yield strength of the materials range from to psi.
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Gulfstream Services, Inc. Wireline Pressure Control Equipment (WPCE) is utilized when entering and then exiting a well with sustained or expected pressure. Quality PCE allows our customers to focus on executing targeted downhole services.
GSI provides a variety of wireline pressure control equipment for both cased and open hole, including experienced operators, for a professionally run job site. Both operators and service companies have turned to us since to provide the highest quality rental equipment and expertise to get the job done safely and efficiently.
GSI has pressure control packages suitable for both electric line and slickline support. We can support your land, inland, shelf, and deepwater needs both domestically and internationally.
Experienced in PCE and wireline operations, our technicians understand what it takes to be successful. Mechanical services, logging and perforating are all more efficiently performed when surface pressure is properly managed.