中石油生产的采油树和井口装置

Part 8 Wellhead and Christmas TreeCPTDC can provide API 6A casing heads, tubing heads and Christmas trees which can meet the requirements of customers for different casing and tubing programs and pressure grades.● Features●Fix the drilled wellhead, connect wellhead casing string,seal and control the annular of casing, suspend tubing,control wellhead pressure, adjust flow rate, induce oil intooutlet pipeline, shut off oil well when necessary, andapplicable to acid fracturing, water injection and testservices●Meet the requirements of API 6A●Consist of casing head, tubing head and Christmas tree●Applicable to all the casing and tubing programs andconnection types●Safe, reliable and easy to operate and maintain●Can be equipped with pneumatic (hydraulic) safety valve●Working pressure: 2, 000 psi¨C20, 000 psi●Working medium: petroleum, natural gas, mud and gascontaining H2S, CO2●Material class: AA, BB, CC, DD, EE, FF●Specification level: PSL 1¨C4●Performance level: PRI¨C2●Block Christmas Tree Wellhead Assembly1. Casing HeadWith the design of versatile straight-bore, the casinghead and casing spool can be equipped with all kinds of slipand mandrel type casing hangers, which have symmetricallock screws and fixed wear bushing●Straight-bore design45˚shoulder with large load capacity●Side outlet connectionPipeline thread side outletThreaded flange side outletVR thread●Secondary sealBT type secondary seal mechanism is designed on the bottom. The casing can be cut on site during tubing installation so as to accommodate the seal height.●Interchangeable casing hangerStandard dimensionsSlip casing hanger and mandrel type casing hanger are interchangeable.●Connection types between casing head and surface casing includingwelded bottom connection,threaded bottom connection andslip bottom connectionCasing Head Body● SpecificationsCasing Spool Body● SpecificationsCasing Hanger● W Type HangerThe seal part is HSN. The slip bowl, slip and supportbase are made of API 6A low alloy steel.Packing off is automatically energized by the casingweight.With reasonable design of slip, the casing hanger haslarge load capacity.It is applicable to all casing heads and spools.● WD Type Casing HangerWD type casing hanger is applied to connect casing headand surface casing and make the slip hold casing tightlywith the help of external force. It is easy to install andoperate.It can connect with 20˝ , 13-3/8˝ and 9-5/8˝ surfacecasings.● Mandrel Type Casing HangerMandrel type casing hanger is designed to meet differentrequirements of customers, which is mainly consisted ofhanger body, rubber seal ring and retainer. It is applied within the casing head and spool. With reliable sealperformance, it is easy to install and operate.Casing Head ToolsWear bushing is mainly used to prevent the damage of casing head and the seal surface of the cavity of casing spool during drilling. It is installed and recovered by the sending-retrieving tool.● Sending-retrieving tool for wear bushingThe tool is used to send and retrieve wear bushing, with excellent reliability and safety.● Test plugTest plug is placed on the shoulder of casing head and casing spool. The test plug is an important accessory to test the seal performance of casing head, casing spool and BOP.We can provide different test plug with different specifications by changing external test plug sleeves.● Multi-functional Test PlugThe multi-functional test plug can be used as the tool for sending and retrieving wear busing and also as test plug.2. Tubing Head and Christmas TreeTubing HeadTubing head has the design of universal straight hold,which can be fitted with all types of single or double-stringcompletion tubing hanger.●Straight hole designWith the design of 45°shoulder and large loadcapability●Side outlet connectionThread cutting Flange side outletWith VR block thread●Top wire assemblyDesigned with complete top wire assemblyLocked anti-wear sleeveTubing head has the design of universal straight hold, which can be fitted with all types of single or double-string completion tubing hanger.●Straight hole designWith the design of 45°shoulder and large load capability●Side outlet connectionThread cutting Flange side outletWith VR block thread●Top wire assemblyDesigned with complete top wire assemblyLocked anti-wear sleeve●Secondary sealBT type secondary seal mechanism is designed at the bottom, which can be adjusted to meet different requirements of height by cutting casing.●Tubing head, upper flange and tubing hangerRubber or metal sealTubing hanger and upper flange can be penetrated directly by cable or penetrated by cable penetrating rod Tubing head and upper flange can be connected with several control pipeline connections at the same time.● SpecificationsTubing HangerTubing hanger has various structures including tapertype and straight seat type. It can be either of metal-to-metalseal or non-metal seal. The product has back pressure valvethread and locating mechanism. It is designed with variouscable penetrating channels including pipeline channel fordownhole safety valve control, chemical injection channeland capillary channelThe upper and lower threads can be API tubing threads,FOX, TM or VAM threads.ToolsBack pressure valve is applied to block the pressure in well to provide convenience for the maintenance and replacement of main valve of Christmas tree.Sending and withdrawal tool for back pressure valve is applied to install and recover back pressure valve under the mechanic and well pressure.3. Special WellheadSpecial wellheads include multi-seat wellhead, compound wellhead, double-pipe wellhead, PC pump wellhead and auto safety control wellhead system.Auto Safety Control Wellhead SystemMetal seal is adopted. The metal sealed parts can workfor a long time with stable and reliable performance in highpressure, corrosion and harsh conditions. The service life ofthe metal sealed parts is much longer than those withoutmetal seal.Multi-functional tubing hanger has the functions ofhanging and seal tubing and has interfaces for ESP cablepenetration, data cable penetration, chemical agent injectionand downhole safety valve control pipeline. It can meet therequirements for various conditions of oil/gas production.The equipment has the function of auto monitoring torealize automatic wellhead shutdown and remote control.The equipment has the function of fire prevention andcontrol to shutdown well in case of fire and ensure thesafety of equipment and personnel.Working pressure: 2, 000¨C20, 000 psiWorking media: petroleum, natural gas, mud and gascontaining H2S and CO2Working temperature: from -46 ℃to 120 ℃Material level: AA, BB, CC, DD, EE, FFSpecification level: PSL 1¨C4Performance level: PR 1¨C24. ValvesFlat ValveFlat valves are designed in accordance with API 6A and can meet the requirements of various working conditions. CPTDC also provides PFF flat valves and JFC flat valves in addition to PFFA flat valves.● FeaturesFull bore designFlat valve plateMetal or non-metal sealField maintenanceManual, pneumatic or hydraulic actuator PFFA Flat Valve● Specifications of PFFA Flat ValveExpansion ValveExpansion valves are designed in accordance with API 6A and can meet the requirements of various working conditions.● FeaturesFull bore designExpansion valve plateMetal or non-metal sealField maintenanceAdjustable Choke ValveThe needle and core are made of hard alloy.The valve is wearing, washing resistant and reliable.The external sleeve choke valve has low switch torque, realizing throttling and shutting fluid.Needle type and external sleeve type choke valves are available for Christmas tree.Fixed/Positive Choke ValveThe bean orifice is made of ceramic or hard alloy.The valve is wearing and washing resistant and reliable The bonnet is connected with union, which is convenient to replace.It is applicable to oil production equipment.Working pressure: 14-105 MPa (2, 000-15, 000 psi)Nominal bore: 2-1/16˝ to 4-1/16˝Hydraulic Safety ValveThe valve works as the execution part in well safety system. When the wellhead is working, the pressure oil of hydraulic control system enters into the cavity in the upper part of hydraulic driver to press the spring so that the valve stem stretches out to open valve gate.When the pressure of wellhead equipment is near the limit of danger, control mechanism receives the signal sent by sensor to release the pressure of cylinder and the spring pushes valve stem to shut valve gate and wellhead equipment to ensure the equipment safety.Mud ValveThe valve is applicable to mud circulating pipeline.Right/left thread is adopted in rotating bushing to improve switch efficiency.Various end connections are available, including flange, thread, union and welding.Standard: API 6ASpecification level: PSL1Performance level: PR1Material level: AA, BB, CC, DD, EE, FFTemperature level: LURetaining ValveEnd connection conforming to API 6ANeedle ValveGate Valve●Z40H-150Lb applicable temperature: ≤425 ℃ (800 ˚F)Applicable to: non-corrosive media such as steam, water and oil●Valve body: WCB●Valve seat seal surface: D802●Valve plate seal surface: uphill welded 13Cr alloy●Valve stem: 1Cr13●stem nut: QTNi20Cr2.5●Z41H 1.6C-16 applicable temperature: ≤325 ℃(610 ˚F)Applicable to non-corrosive media such as steam, water and oil●Z41Y 1.61-161 applicable temperature: ≤530 ℃(990 ˚F)Applicable to non-corrosive media such as steam, water and oil●Z41W 1.6P-6.4P applicable temperature:≤200 ℃(390 ˚F)Applicable to acid and alkalis●Z41W1.6R-6.4R applicable temperature:≤200 ℃(390 ˚F)Applicable to acid and alkalisBall Valve● FeaturesThe floating seat the ball and seat are closer.Reliable sealEconomical structure is adopted to reduce switch torque.The design meets the requirements of API 6D.● Technical ParametersRated pressure: 150-1, 500 lbsNominal bore: 10˝ -30˝。