Horizontal subsea tree system industrystandard, costeffective systems for shallow and deep water accommodate 10,000psi shallowwater and 10,000 and 15,000psi deepwater environments. The tree body, a heavy forging with production flow paths, designed for pressure containment. A tree connector to attach the tree to the subsea wellhead. This presentation is a course a bout wellheads which includes the basic components of the well head and the advanced techniques. Ohio all surface equipment must be pressure rated to withstand. Wellhead and christmas tree composed by three parts, including casing head, tubing head, oil gas tree, used to connect casing string, tubing string and sealing layers between the casing and tubing of the annular space between, so to control the wellhead pressure and wellhead flow, it also could be used for acid fracturing, water injection. Describes requirements and recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, purchasing, repair and remanufacture of wellhead and christmas tree equipment for use in the petroleum and natural gas industries. 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. It supports the remaining parts of the wellhead and completion equipment. The maximum operation pressure of the wellhead and christmas tree is 105. A wellhead must be present to utilize a christmas tree and is used without a christmas tree during drilling operations. The casing head in a conventional wellhead system is the lowest part of the wellhead. Wellhead and christmas tree components, types, functions and more free download as powerpoint presentation. The tree valves may be integral with the tree body.
Producing surface wells that require pumps pump jacks, nodding. Many times, the words christmas tree and wellhead are used interchangeably. The casing head in a conventional wellhead system is the lowest part of the wellhead assembly and is almost always connected to the surface casing string. A vertical assembly of mechanical elements used in oil exploration and production in surface and underwater oil and.
Threads, conform to api 5b stipulations for concerned tolerances. Download for offline reading, highlight, bookmark or take notes while you read oil and gas surface wellhead and christmas tree. Annulus flow paths may also be included in the tree body. Designed to reduce installation time and enhance safety, they use trims and proprietary sealing technologies for expected well conditions. The christmas tree and the wellhead work together to bring oil and gas to the surface. All books are in clear copy here, and all files are secure so dont worry about it. Wellhead and christmas tree components, types, functions. Lgh sells and services new and remanufactured api6a conventional wellhead and christmas tree equipment. Cameron wellhead systems range from conventional to applicationspecific systems for geothermal wells, jackup rigs, unconventional plays, and more. Offering stack or block type christmas tree with pressure ratings up to.
Wellhead and christmas tree equipment must meet most recent and relevant api standards. This site is like a library, you could find million book here. Wellhead equipment made in the plant can be used for oil and gas production, water or vappr injection and so on. Specification for wellhead and christmas tree equipment ansiapi specification 6a twentieth edition, october 2010 effective date. For selecting materials suited to well conditions for ordering equipment. Wellheads and christmas trees are different pieces of equipment figure 1. The lower valve block section is integral with the wellhead and includes access between the production line and the tubing annulus to the main bore of the wellhead. Profi is a leading manufacturer and services provider of oilfield equipment used in drilling and production of oil and gas we design and manufacture a complete line of api 6d products with high quality and specialist in engineering which consists of gate valves, choke valves, ball valves, check valves our service and aftermarket team provides a full range of repair and remanufacture of. Profi oilfield international valves, christmas trees.
It comes in the types of normal oil production wellhead, thermal recovery wellhead, offshore wellhead, low and high pressure antisulfide wellhead. The difference between a wellhead and christmas tree. The wellhead is the component at the surface of a well that provides the structural and pressurecontaining interface for the drilling and production equipment. Wellhead and christmas tree components, types, functions and. Helping students who care about petroleum industry to increase their. Tree complexity has increased over the last few decades. Special notes api publications necessarily address problems of a general nature. Wellhead inspection and maintenance substrata oil and gas. China wellhead christmas tree, wellhead christmas tree. Jereh is a professional manufacturer of conventional wellhead, multi bowl wellhead, integral wellhead, dual tubing wellhead, esp wellhead, frac tree, christmas tree. It was named for its resemblance to the series of starting lights at a drag racing strip, called by that name. Wellhead means the upper terminal of the well including adapters, ports, valves, seals, and other attachments 15a ncac 02c.
A christmas tree is an assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well. Lgh recognizes that to use customer inventory as much as possible has advantages to customers in terms of cost, inventory control, as well as convenience. In oil and natural gas extraction, a christmas tree, or tree, is an assembly of valves, spools and fittings used for not only extraction, but also for water injection or disposal, gas injection and other operations. In petroleum and natural gas extraction, a christmas tree, or tree, is an assembly of valves, spools, and fittings used to regulate the flow of pipes in an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells. Provides a means for attachment to the surface casing string. It was formulated to provide safe, dimensionally and functionally interchangeable wellhead and tree equipment. Dovewell group limited is always open for communication on whatever questions you may have.
Specification for wellhead and christmas tree equipment. Components illustration handbook ebook written by okon obo, phd. A wellhead assembly and christmas tree is the component at the surface of an oil well or a gas well that provides the structural and pressurecontaining interface for the drilling and production equipment. The specification includes detailed requirements for manufacturing tubular suspension equipment, valves, and fittings used at oil and gas well locations to contain and. Pdf the subsea tree is basically the connection between the wellhead. Specification for wellhead and christmas tree equipment publication date. American petroleum institute legally binding document. This specification identifies requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipment, and purchasing of wellhead and tree equipment for. Specification for subsea wellhead and christmas tree equipment. Specification for wellhead and christmas tree equipment name of standards organization. Iso 10423 specification for wellhead and christmas tree equipment replace api 6a api spec 17d specification for subsea wellhead and christmas tree equipment will be replaced by iso 628 part 4 api rp 17g recommended practice for design and operation of completionwork over riser systems will be replaced by iso 628 part 5. The wellhead sits at the surface of an oil or gas well and is the suspension point and pressure seal for the drill string, casing line and production tubing that are lowered into the hole at different stages of the wells lifecycle. The device described herein combines a subsea wellhead and a tree mandrel into a single piece. By order of the executive director office of the federal register washington, d.
For more information on wellhead and christmas tree, refer to the following article. We are here to bring together china factories that supply manufacturing systems and machinery that are used by processing industries including but not limited to. So in case you do have questions as we assume just go ahead and contact us. Download wellhead and christmas tree book pdf free download link or read online here in pdf. The product includes conventional oil production wellhead, kys series wellhead and christmas. Read online wellhead and christmas tree book pdf free download link book now. Producing wells that require pumps, such as sucher rod. Christmas tree oil and gas definition investopedia. A wellhead must be present in order to utilize a christmas tree and is used without a christmas tree during drilling operations. In order to safe guard asset structural integrity, it is increasingly important to adequately service and maintain wellhead and christmas tree assemblies to confirm the integrity is fit for purpose and ensure surface barrier against hydrocarbon leakage and reliability in an emergency situation. Api 6a wellhead assembly and christmas tree for oil well.
Conventional wellhead, multi bowl wellhead, integral. Wellhead and christmas tree is the main equipment for oil production, water injection and downhole operation. Cameron was the first to engineer surface wellhead systems. Hydraulic surface safety valve ssv is designed to quick closure due to a pipe leak or burst, equipment malfunction, fire, or similar emergency. The surface safety valve ssv is normally closed,pressure needs to be applied to the actuator to compress the spring and open the valve the pressure needed to keep the valve open can be provided with a simple hand pump which, in an emergency, is. Also included are examples of casing and bit programmes that are consistent with the wellheads shown. The valve at the top is called swab valve and it is used for well interventions like slickline, wireline or coiled tubing. Wellheads xmas trees gate valves plug valves manifolds brochures. Tree valves for the production bore, the annulus, and ancillary functions. Christmas tree offering stack or block type christmas tree with pressure ratings up to 10,000 psi bottom connections and bottom sealing type are customized to suit the application valves actuation is offered in pneumatic or hydraulic according to requirements available for single or dual completions. The wellhead includes a tree valve block having an upper and lower section. Christmas tree means the set of valves, spools and fittings connected to a wellhead to direct and control the flow of formation fluids.
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