The subsurface safety valve is an emergency safety device, and is not intended or designed for operational activities, such as productioninjection reduction, production stop, or as a backflow valve. Surfacecontrolled subsurface safety valve scssv the more recent scssv design is a normally closed valve, with the spring force, f5, acting to push the piston upward and release the flapper to close the valve. A subsurface safety valve has a tubular valve housing, a valve closure member movable between an open and a closed position, an axially shiftable flow tube for opening the valve closure member, a spring for biasing the flow tube to a closed position, a piston and cylinder assembly to move the flow tube to an open position, and a plug inserted within an opening in the valve housing. Restoring functionality to subsurface safety valves with extreme damaged seal bores graeme allan, bp well intervention engineer.
Feb 19, 20 baker hughes reach surface controlled subsurface safety valves are ideal for deepset wells, deep water, and extreme hpht applications surpassing 10,000 psi and 350f. In each case, the safety valve system is designed to be failsafe, so that the wellbore is isolated in the event of. The unique design of the wrsv incorporates flatflapper technology and maintains a large through bore. We offer a full range of valves to suit applications ranging from shallow to deepset, and. Since 1990, over 30,000 halliburton safety valves have been sold. The facility is designed to ensure that the valves meet minimum specifications concerning. Selecting a surfacecontrolled subsurface safety valve for deep. The sealing surface of the flapper is configured to contact the sealing surface of. In each case, the safetyvalve system is designed to be failsafe, so that the wellbore is isolated in the event of. Tubingretrievable safety valves weatherford international. Expro surface safety valves are hydraulically actuated failsafe gate valves designed to close upon loss of control line pressure.
Subsurface safety valves sssvs are required in all offshore oil and gas. Through the heritage of camco subsurface safety valves. Us20030079880a1 curved flapper and seat for a subsurface. The mms is incorporating the eleventh edition of api spec 14a because it updated the design validation and functional testing requirements, incorporated new. The safety valve system is designed to be fail safe, so that the wellbore is isolated in the event of any system failure or damage to the surface. Our flow component testing facilities are accredited through the american petroleum institute api to perform validation safety valve testing on both surface and subsurface safety valves. In each case, the safetyvalve system is designed to be. Jun 08, 2018 knowing subsurface safety valve api14 a 1. Most downhole safety valves installed as part of the completion design are classed as tubing retrievable. The valve is used in conjunction with an emergency shut down system.
Based on modular concept, the entire system is mainly composed of mechanical components and computer control system. Our downhole safety valves provide your testing operations with failsafe sustained control downhole in the event of an emergency or to facilitate test procedures. Standards and technical documents petroleum and natural gas industries subsurface safety valve systems design, installation, operation and redress iso 10417. A wireline retrievable valve design was selected for testing rather than a. Users of this international standard should be aware that further or differing requirements might be needed for. Innovative design and simple operation protect your investment. Wrdp2 slicklineretrievable subsurface safety valves. Whether of the surface controlled sc, subsurface controlled ssc, wireline retrievable wr, tubing retrievable tr, ball check, or flapper variety, ssvs can easily be damaged during throughtubing wireline, coiled tubing, electric line, etc. Subsurface safety valve automation test systems design. Shanghai 7th june 2018g 7 charlie chong fion zhang 2.
The full designation for a typical valve is tubing retrievable, surface controlled, subsurface safety valve, abbreviated to trscssv. Operation the trm4 safety valves are a normally closed design. With a 97% plus reliability rate and proficiency in subsurface design, we design our subsurface safety. Table 3subsurface safety valve technical challenges thompson, 2012 subsurface safety valves.
Subsurface safety valves sssv operations completion. D flow tube outer piston diameter actual dimension depends on design. Iso 10432 petroleum and natural gas industries downhole equipment subsurface safety valve equipment published by iso on december 15, 2004 this international standard provides the minimum acceptable requirements for subsurface safety valves sssvs. Tubing retrievable surface controlled subsurface safety. They are classified according to the location from which they are controlled surface or subsurface. The safety valve is a surface controlled subsurface safety valve and is normally closed. Oct 09, 2010 surfacecontrolled subsurface safety valve scssv the more recent scssv design is a normally closed valve, with the spring force, f5, acting to push the piston upward and release the flapper to close the valve.
Subsurface safety valve equipment sssv cfer technologies. It isolates wellbore pressure and fluids in the event of an emergency or catastrophic failure of surface equipment. In this article, subsurface safety valve types, operating systems, working principle, setting. The control system based on the labview and plc can. Discuss troubles we experienced in iran with our first installations. The working principle is analyzed for the subsurface safety valve test. The actuated gate valve is on the upstream end, and the access tee on the downstream end with the chokecontrol valve between these two components. Wrdp2 slicklineretrievable subsurface safety valves scssv. All testing is completed under an api q1 and iso 17025 quality. Discuss work done to improve our valves and eliminate troubles. It covers subsurface safety valves including all components that establish tolerances andor clearances which may affect performance or interchangeability of the sssvs.
Our subsurface engineering solution delivers 3d design, modeling, and analysis that enables you to easily integrate and share subsurface designs and associated data during all project phases. A downhole safety valve refers to a component on an oil and gas well, which acts as a failsafe. The mms is incorporating by reference the eleventh edition of the american petroleum institutes specification for subsurface safety valve equipment api spec 14a into its regulations. The curved flapper has a sealing surface for engaging a corresponding sealing surface on a seat when the flapper is in its closed position. The hydraulic control pressure is transmitted from a remote location through a. The flapper is biased to a normally closed position to prevent fluid flow through the wellbore. Feb 04, 1997 a subsurface safety valve of claim 1 wherein the opening is substantially parallel with and adjacent a piston and cylinder assembly within the valve housing. The halliburton sp series tubingretrievable safety valve is a single rodpiston nonelastomer flapper valve designed for hostile environments and extended life applications where ultimate reliability is required. Tagged 14 control line, 14 inch stainless steel control line, and operation of subsurface safety valve systems, api rp 14b, ball type scssv, concept 2 completion pte ltd, differential type subsurface controlled subsurface safety valve, flapper type scssv, installation, recommended practice for design, scssv, scssv setting depth, sscsv, sssv.
Nov 25, 1986 a surface controlled subsurface well safety valve for use in a well tubing string including a flapper valve member, an operator tube for opening the flapper valve member and holding it open, an annular piston on the operator tube operative in response to control fluid pressure conducted from the surface, a spring biasing the operator tube to a. Multifinger calliper across the safety valve installed a sleeve when downmanning. Ensure reliable well control to protect against hse impacts our portfolio of subsurface safety valves deliver reliable performance when it matters the most, providing emergency closure in the event that well control is lost. A surface controlled subsurface well safety valve for use in a well tubing string including a flapper valve member, an operator tube for opening the flapper valve member and holding it open, an annular piston on the operator tube operative in response to control fluid pressure conducted from the surface, a spring biasing the operator tube to a position at which the flapper valve is closed, and. A subsurface safety valve of claim 1 wherein a first end of the plug is configured to prevent the plug from reentering the opening once the first end of the plug has been withdrawn. Abstract from a safety aspect, a surfacecontrolled subsurface safety valve scssv is.
Specification for subsurface safety valve equipment. Starpetrotech tubing retrievable safety valve trsv. Discuss development of a valve for use in gas wells, including test work in oklahoma. A curved flapper and seat is disclosed for use in a subsurface safety valve.
Qualification testing of subsurface safety valve equipment to api 14a the industry challenge operators are completing wells in increasingly challenging environments where equipment are subject to extreme pressures, temperatures, and mechanical loading. Api rp 14b design, installation, operation, test, and. Dec 10, 2017 safety valves are designed to automatically shut in the flow of a well in the event surface controls fail or surface equipment becomes damaged. The new valve will enable on and offshore installations to meet all safety regulations while improving the operational footprint at the wellsite during installation and retrieval by reducing time, cost, personnel and risk. Wrdp2 slicklineretrievable subsurface safety valves are designed for sweet to moderately corrosive environments and feature rodpiston operation with flapper valves and an internal equalizing system that can be disabled by plugging the equalization ports before installation. To the subsurface safety valve testing, an intelligent automatic test system is designed based on the control computer and programmable logic controller. Real results in louisiana, usa a pressure bellows safety valve immediately shut in production and prevented a major hydrocarbon spill, which led an operator to request valves on 20 or more wells. Surfacecontrolled subsurface safety valve oilfieldwiki. With a 97% plus reliability rate and proficiency in subsurface design, we design our subsurface safety valves to meet your well requirements.
Wirelineretrievable safety valves weatherford international. The valve is held open by hydraulic control pressure and remains open until the controlline pressure is exhausted. A downhole safety valve that is operated from surface facilities through a control line strapped to the external surface of the production tubing. Repeatability and effectiveness of subsurface controlled subsurface. Tubing retrievable surface controlled subsurface safety valve. New downhole esp safety valve offshore engineer magazine. Subsurface safety valves sssvs are installed in the wellbore of hydrocarbon producing wells to shut off the production flow to the surface in case of an emergency. Federal register wednesday, december 17, 1997 62 fr 663 background. Subsurface safety valve basics production technology. Deepshield deepwater subsurface safety valves deliver failsafe performance in completions. The reach subsurface safety valves can be set as deep as 20,000ft and ensure failsafeclosed operation using reliable, fieldproven, heavy sprung closure technology, according to the service company. Having incorrect or incomplete data associated with underground utilities can increase project costs and potentially compromise safety and the environment. Performance testing of subsurface safety valves journal.
The importance of the correct installation of these valves to ensure well production flow is shut in during an emergency can not be over emphasised. Surfacecontrolled subsurface safety valve scssv is a key safety critical equipment in wells and is operated from surface facilities through a control line strapped to the external surface of the production tubing. Our v1certified deepset valves provide failsafe closurewithout being affected by tubing. The valve is used to quickly shut in the well in the event of a leak to, overpressure or failure of any of the downstream welltest equipment.
The facilities are also used to perform safety valve testing on other downhole safety valves, riser isolation valves, and wellhead valves. Brochure subsurface safety and injection valves designed to. Opening is achieved by applying hydraulic pressure through a w control line that extends from the safety valve through the wellhead to a. Achieve conventional safetyvalve reliability in deepwater wells. Recommended practice for design, installation, repair and operation of subsurface safety valve systems this rp covers procedures for design calculations, instructions for safe installation, and guidelines for operating and testing to assure safe and efficient performance of the sssv system. Potential leak paths within the valve are minimized with the single rodpiston design. The flow component testing facilities fctf at swri are accredited through the american petroleum institute api to perform validation testing on both surface and subsurface safety valves. Two types of subsurface safety valve are available. The mms is incorporating the eleventh edition of api spec 14a because it updated the design validation and. At gate, our engineering team leverages our proprietary inhouse fluid flow and thermohydraulics engine against your challenges by customizing our tools, we help. A safety device installed in the upper wellbore to provide emergency closure of the producing conduits in the event of an emergency. Design, installation, repair and operation of subsurface. Baker hughes has a new tubing retrievable, subsurface safety valve for ultra deepset, deepwater and hpht applications. At gate, our engineering team leverages our proprietary inhouse fluid flow and thermohydraulics engine against your challenges by customizing our tools, we help you make better, faster decisions the first time.
Subsurface safety systems baker hughes, a ge company. All controls on a config2 are completely mounted, tubed and tested. The hydraulic control pressure is transmitted from a remote location through a control line to operate the valve. A test facility for performance testing of oil and gas well subsurface safety valves in accordance with the american petroleum institutes spec. Positioning edit the location of the downhole safety valve within the completion is a precisely determined parameter intended to optimise safety. An api 14a qualified subsurface safety valve sssv is a legal requirement for producing wells in many regions. Api rp 14b russian design, installation, repair and. Safety valves are designed to automatically shut in the flow of a well in the event surface controls fail or surface equipment becomes damaged. Review surface controlled subsurface safety valves. Development of a selfequalizing surface controlled. Technical manual with description of the subsurface safety valve including drawing for the item 1. Knowing subsurface safety valve api14 a linkedin slideshare. Sp series tubingretrievable safety valve halliburton.
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