China Puyang Zhongshi Group Co., Ltd. Company News

API Sucker Rod Pump Spray Metal Plunger Shippment to Russia Mechanical properties, surface finish and dimensional accuracy is higher than the standard requirements.Corrosion resistance is strong, long service life, product size can be customized. Plunger: 1045 steel spraying (B1), 1045 steel spraying (B2), 1045 steel chrome plating (A1), 1045 steel double chrome plating (A2).

Title：Company Dispatches Batch of API‑Compliant Pump Barrels to Venezuela in July 2026 Date: July, 2026 Our company has completed manufacturing and shipment for a batch of pump barrels for Venezuela petroleum operators. All pump barrels are manufactured to API 11AX requirements, with full MTC material test certificates provided. The whole consignment has been loaded for sea‑worthy export shipment in July 2026. The pump barrels will be applied to on‑site sucker‑rod pump systems, helping improve production efficiency for local oil wells. We will keep providing reliable API‑standard down‑hole components for Latin‑America oil‑and‑gas clients.

Title：Company Dispatches Batch of API‑Compliant Pump Barrels to Venezuela in July 2026 Date: July, 2026 Our company has completed manufacturing and shipment for a batch of pump barrels for Venezuela petroleum operators. All pump barrels are manufactured to API 11AX requirements, with full MTC material test certificates provided. The whole consignment has been loaded for sea‑worthy export shipment in July 2026. The pump barrels will be applied to on‑site sucker‑rod pump systems, helping improve production efficiency for local oil wells. We will keep providing reliable API‑standard down‑hole components for Latin‑America oil‑and‑gas clients.

The polished rod clamp is of butterfly structure, it is fixed on the polished rod as retaining device for the rope hanger. It makes the pumping unit horse-head connected with polished rod through rod eye lifting device, and then the polished rod append and support the load of sucker rod string. The polished rod clamp is an important part connecting oil pump and sucker rod, it is required not only reliable, have a certain capacity, but also can not cause damage for sucker rod.   Polished rod clamps function: It has solved the problem of the polished rod body damage caused by the taper slip jamming dens pressing into rod body and greatly reduced the accident of seriously hurting the seal element to cause oil leakage due to the scar on the polished rod surface in the process of resulting stoke parameters or changing pump setting depth.   Puyang Zhongshi Group supply polished rod clamps with two kinds of material technology-casting technology and forging technology. The performance of forging type polished rod clamps is better than casting type.  

Casing with Screen Jacket: High-Performance Wire-Wrapped Screen Pipe for Oil & Gas Filtration In the demanding world of oil and gas extraction, effective sand control and filtration are critical to maintaining well integrity and maximizing production efficiency. We are proud to introduce our premium Casing with Screen Jacket, a high-performance wire-wrapped screen pipe engineered specifically for crude oil filtration applications. Manufactured to meet API 5CT standards, this advanced downhole solution combines decades of metallurgical expertise with precision engineering to deliver reliable sand control in even the most challenging reservoir conditions. Product Specifications At the core of our offering is the 4-1/2″ OD, 11.6 PPF, K55 grade casing with BTC R3 thread connection, featuring a precision wire-wrapped screen jacket. The K55 steel casing body provides exceptional mechanical strength and collapse resistance, while the wire-wrapped screen layer is manufactured using tightly controlled winding technology to achieve consistent slot openings tailored to specific formation sand particle sizes. Parameter Specification Outer Diameter 4-1/2 inches (114.3 mm) Weight 11.6 PPF (pounds per foot) Material Grade K55 Carbon Steel per API 5CT Connection Type BTC (Buttress Thread Casing), R3 Screen Type Wire-Wrapped Screen Jacket Certification API 5CT Compliant Application Crude Oil Filtration & Sand Control Key Features & Advantages Our Casing with Screen Jacket delivers a comprehensive set of performance advantages that set it apart in the global oilfield equipment market: Superior Filtration Precision — The wire-wrapped screen jacket is manufactured with exacting slot size control, ensuring precise sand particle filtration and minimizing sand production that can damage downhole pumps and surface equipment. Exceptional Corrosion Resistance — K55 grade steel, combined with proprietary surface treatment processes, provides outstanding resistance to corrosive downhole fluids, significantly extending operational service life. Extended Service Life — The robust construction and high-quality materials translate to longer well completion intervals and reduced workover frequency, lowering the total cost of ownership for operators. High Mechanical Strength — The K55 casing body with 11.6 PPF wall thickness offers excellent collapse and burst ratings, making it suitable for medium to deep well applications where formation pressures demand reliable casing integrity. Manufacturing Excellence — 30+ Years of Expertise With over 30 years of specialized manufacturing experience, our company has established itself as a trusted partner in the global oil and gas supply chain. Our state-of-the-art production facility employs advanced CNC winding machines, automated welding systems, and rigorous quality control protocols to ensure every Casing with Screen Jacket meets the highest industry standards. Each unit undergoes comprehensive dimensional inspection, hydraulic pressure testing, and slot size verification before shipment. Global Reach & Proven Project Experience Our Casing with Screen Jacket products have been successfully deployed in major oil projects across South America, the Middle East, and other key petroleum-producing regions. Operators in these diverse geological environments have consistently reported improved sand control performance, reduced non-productive time, and enhanced well productivity after installing our wire-wrapped screen casing solutions. The product's proven track record in both onshore and offshore applications demonstrates its versatility and reliability under varying operational conditions. Why Choose Our Casing with Screen Jacket? API 5CT Certified — Full compliance with international petroleum industry standards 30+ Years Manufacturing Experience — Deep industry knowledge and refined production processes Global Export — Trusted by oilfield operators in South America, the Middle East and beyond Customizable Solutions — Slot sizes and specifications can be tailored to project requirements Quality Assured — 100% dimensional and pressure testing before delivery As the global energy industry continues to demand higher performance from downhole equipment, our API 5CT certified Casing with Screen Jacket stands ready to meet these challenges. We invite oilfield operators, EPC contractors, and procurement professionals to contact us for detailed technical specifications, pricing inquiries, and project-specific engineering support.

Puyang Zhongshi Group Company Ltd was founded in 1997,which is the restructured enterprise of Central Plains oilfield branch company of SINOPEC .The company registered capital is 130 million yuan,with annual output value 200 million yuan,580 employees, Oil machinery is our main products, the leading products include pumping unit,subsurface sucker rod pump, wellhead (Christmas Tree), pressure vessels,drilling solid control series products and cementing accessories, We had attained ISO 9001 in 1998 and API Certificates in 2002 . Our products exported to Southeast Asia, Northern Europe, the Middle East, Africa and South America market. The recently shipment is for Russia of the Barrel of sucker rod pump. For the barrel, we mainly use the craft of chrome praying or nickle phosphorous praying.

An overseas client recently visited our factory. He inspected our full production line and petroleum equipment products in person.After checking processing craft and quality control procedures, the customer gave high praise to our product quality and manufacturing strength, and discussed long-term procurement cooperation with our team.

About Puyang Zhongshi Group Puyang Zhongshi Group Co., Ltd. was restructured from the Central Plains Oilfield Branch of SINOPEC in 1997. With over 25 years of manufacturing experience in petroleum machinery, the company operates 9 specialized factories with more than 500 employees, including 160+ technical and administrative professionals. Annual output value exceeds 200 million yuan. The company holds API monogram licenses for 5CT, 6A, 10D, 11AX, and 11E, as well as ISO 9001, ISO 14001 certifications. Products have been exported to more than 30 countries including the United States, Canada, Russia, Venezuela, Colombia, Thailand, Indonesia, UAE, Saudi Arabia, and Kazakhstan. Core product lines include sucker rod pumps, pumping units, wellhead equipment and Christmas Trees, pressure vessels, drilling solids control systems, and cementing accessories. Customer Background A mid-sized independent operator in the Sultanate of Oman manages a mature onshore oilfield in the Ghaba Salt Basin. The field produces 28-32° API crude from the Barik sandstone formation at well depths ranging from 2,400 to 3,100 meters. Reservoir pressure varies between 1,800 and 2,600 PSI, with H2S concentrations measured at 1.2-2.8% by volume and CO2 content averaging 3.5%. Bottom-hole static temperature reaches 98°C under flowing conditions. The operator runs 47 active production wells, of which 31 are naturally flowing and 16 require gas lift assistance. Daily gross production averages 18,500 barrels of fluid with an average water cut of 64%. The field has been on production since 2004, and the original wellhead equipment was approaching the end of its design service life. Initial Problems By early 2024, the operator recorded escalating wellhead-related failures across the field: Gate valve seat leakage: 12 wells experienced internal leakage past gate valve seats, requiring frequent injection of valve sealant as a temporary measure. Two wells had progressed to full valve body washout. Flange ring groove corrosion: RTJ flange ring grooves on 5 wells showed pitting depths exceeding 1.5 mm, compromising pressure integrity during well intervention operations. Tubing hanger neck seal degradation: Elastomeric seals in 8 tubing hangers had hardened and lost elasticity, producing measurable gas migration to the secondary seal area at casing head outlets. Operational impact: Unscheduled downtime reached 380 hours per quarter across the field. Well intervention costs averaged $42,000 per event. The operator spent approximately $680,000 annually on emergency wellhead repairs, sealant injection campaigns, and replacement components from multiple suppliers. Procurement fragmentation: Sourcing replacement parts from 5 different suppliers created inventory complexity and inconsistent material traceability across the field. Why Customer Chose Puyang Zhongshi The operator evaluated proposals from three API 6A-licensed manufacturers. Puyang Zhongshi Group was selected based on the following technical and commercial criteria: Evaluation CriterionRequirementZhongshi Response API 6A Monogram LicenseMandatory - PSL 2 minimumPSL 3G capability, license valid since 2002 H2S/CO2 Material ComplianceNACE MR0175/ISO 15156Material classes AA through FF, full NACE compliance Pressure Rating3,000-5,000 PSI working pressure2,000-20,000 PSI range, all verified by hydrostatic testing Forging Source TraceabilityFull mill certificates requiredHeat lot traceability from forging to final assembly Delivery Lead Time8-12 weeks from PODelivered in 6 weeks including custom material qualification Engineering SupportOn-site installation supervisionProvided commissioning engineer for first 3 wells Aftermarket CommitmentSpare parts availability - 5 years minimumEstablished consignment stock at operator's warehouse in Muscat Products Purchased ItemSpecificationQuantity API 6A Christmas Tree Assembly5,000 PSI WP, 2-9/16" nominal bore, dual-wing configuration, material class DD (sour service), PR2 tested8 sets Tubing Head Spool7-1/16" x 2-9/16", bottom flanged connection, with dual lockdown screws and secondary seal injection ports8 units Casing Head Housing9" top connection, slip-on weld bottom, with dual casing hanger landing shoulder4 units Gate Valve (Manual)2-9/16" 5K, metal-seated, rising stem, with grease injection fitting and backseat test port16 units Adjustable Choke2-9/16" 5K inlet, 2" outlet, with calibrated bean and needle tip, tungsten carbide trim8 units Ring Gaskets & Seal KitsType BX-153/BX-154, Inconel 825, with elastomeric backup seals8 complete sets Recommended Products for Your Operations Based on this successful deployment, Puyang Zhongshi recommends the following complementary equipment for operators seeking integrated wellhead-to-downhole solutions: 1. API 6A Wellhead Christmas Tree Assembly Available in pressure ratings from 2,000 to 20,000 PSI with nominal bore sizes from 2-9/16" to 7-1/16". Configurable as single-wing or dual-wing with optional pneumatic or hydraulic safety valves. Material classes AA through FF to suit any well fluid composition. All assemblies undergo hydrostatic body testing at 1.5x rated working pressure and gas testing at rated pressure with full NDT documentation. Model RangePressure RatingBore SizeMaterial Class Options ZS-CT-2K2,000 PSI (13.8 MPa)2-9/16"~7-1/16"AA, BB, CC ZS-CT-3K3,000 PSI (20.7 MPa)2-9/16"~7-1/16"AA, BB, CC, DD ZS-CT-5K5,000 PSI (34.5 MPa)2-9/16"~7-1/16"AA, BB, CC, DD, EE ZS-CT-10K10,000 PSI (69.0 MPa)2-9/16"~7-1/16"AA, BB, CC, DD, EE, FF ZS-CT-15K15,000 PSI (103.5 MPa)2-9/16"~7-1/16"AA, BB, CC, DD, EE, FF ZS-CT-20K20,000 PSI (138.0 MPa)2-9/16"~7-1/16"AA, BB, CC, DD, EE, FF 2. API 11E Beam Pumping Unit For wells transitioning from natural flow to artificial lift, Zhongshi's API 11E pumping units provide reliable mechanical lifting with stroke lengths up to 200 inches and peak torque ratings to 912,000 in-lbs. Available in conventional, Mark II, and air-balanced configurations with API structural ratings from 6.4 to 912. 3. API 11AX Subsurface Sucker Rod Pump Insert and tubing pumps in sizes from 1-1/16" to 4-3/4" with barrel options including chrome-plated, nickel-carbide coated, and carbon steel. Available in RHAC, RHBC, RWHC, and RWBC configurations. All pumps are individually dyno-tested before shipment. 4. Cementing Accessories Complete range of float collars, float shoes, centralizers (bow-spring and rigid), cement baskets, and stage cementing tools. Fully compatible with standard API casing and tubing sizes from 4-1/2" to 20". Quality Assurance & Certifications CertificationStandardValid Since API 6AWellhead and Christmas Tree Equipment2002 API 5CTCasing and Tubing2003 API 10DBow-Spring Casing Centralizers2010 API 11AXSubsurface Sucker Rod Pumps2002 API 11EPumping Units2002 ISO 9001Quality Management System1998 ISO 14001Environmental Management System2012 Technical Solution Material Selection Process: The operator's corrosion engineering team provided produced fluid analysis data. Zhongshi recommended Class DD material per API 6A — a 75K minimum yield strength low-alloy steel with controlled hardness (HRC 22 max) per NACE MR0175 for H2S service. All pressure-containing forgings underwent 100% ultrasonic testing (UT) to ASTM A388 and magnetic particle inspection (MPI) to ASTM E709 prior to machining. Valve Design Upgrade: A key departure from the previous equipment was the specification of metal-seated gate valves with Stellite 6 hard-facing on both gate and seat sealing surfaces. The previous supplier had used elastomer-insert seats that degraded within 18-24 months under combined H2S and thermal cycling. The metal-seat design eliminated this failure mode entirely. Corrosion Protection: All exposed carbon steel surfaces received a three-coat offshore-grade paint system: zinc-rich epoxy primer, high-build epoxy intermediate coat, and polyurethane topcoat. Internal wetted surfaces were left uncoated to avoid coating delamination risk in sour service. Quality Inspection: Each Christmas Tree assembly underwent hydrostatic body testing at 1.5x rated working pressure (7,500 PSI) with a 15-minute hold period, followed by gas testing at rated working pressure with nitrogen at 5,000 PSI. Test certificates and UT/MPI reports were compiled into a data book delivered with each assembly. Packaging & Export: Each assembly was skid-mounted on steel frames with bolted tie-down points, wrapped in VCI (Volatile Corrosion Inhibitor) film, and enclosed in plywood crates with desiccant packs. All flange faces received protective covers with bolted retainers. Shipment departed Shanghai by container vessel with 24-day transit to Port of Sohar, Oman. Project Results KPIBefore RetrofitAfter RetrofitImprovement Unscheduled wellhead downtime (hrs/quarter)38015260% reduction Average well intervention cost per event$42,000$18,50056% reduction Annual wellhead maintenance spend$680,000$295,00057% reduction Gate valve replacement frequency18-24 monthsNo replacements in 14 monthsIn progress Number of active suppliers for wellhead components5180% reduction Mean time between wellhead-related interventions11 weeks35 weeks3.2x improvement The operator's production superintendent reported: "The Zhongshi Christmas Trees have been running without a single valve leak or seal issue since commissioning. Our intervention team can now focus on artificial lift optimization instead of emergency wellhead repairs." Why This Project Matters Procurement Insight: This project demonstrates that material specification — not just pressure rating — is the critical differentiator when selecting wellhead equipment for sour service. The operator's previous supplier satisfied the API 6A mechanical requirements but used materials unsuitable for the corrosive environment, resulting in chronic failures. Selection Tips for Operators: Always request complete material class certification per API 6A Annex F before issuing a purchase order Insist on UT and MPI reports for all pressure-containing forgings — not just certificates of conformity Consider consignment stock agreements to reduce inventory carrying costs and ensure spare parts availability Evaluate Total Cost of Ownership including intervention costs, not just unit price at PO stage For Artificial Lift Engineers: Wellhead integrity directly impacts artificial lift system performance. Gas migration past tubing hanger seals can artificially depress casing pressure readings, leading to inaccurate gas lift valve set-point calculations. Stable wellhead conditions are a prerequisite for reliable artificial lift optimization. Frequently Asked Questions Q: How do you determine the correct API 6A material class for sour service?A: Material class selection depends on H2S partial pressure, chloride concentration, pH, and temperature. For H2S concentrations above 0.05 psi partial pressure, NACE MR0175 applies. Class DD and EE materials are commonly specified for Middle East sour fields. Always provide your corrosion engineer with complete produced fluid analysis data. Q: What is the typical lead time for API 6A Christmas Tree assemblies?A: Standard lead time is 8-12 weeks from receipt of an approved order. Custom material grades or non-standard bore sizes may add 2-4 weeks. Expedited delivery can reduce lead time to 6 weeks for standard configurations. Q: Can existing tubing heads be reused when upgrading Christmas Trees?A: It depends on the condition of the tubing head flange face, ring groove, and lock screw threads. We recommend a dimensional inspection and NDT of the existing tubing head before committing to reuse. If ring groove pitting exceeds 0.8 mm or thread engagement is below 75%, replacement is recommended. Q: What testing is performed before shipment?A: Every assembly undergoes hydrostatic body test at 1.5x rated working pressure, gas test at rated working pressure, and function test of all gate valves (open/close cycles). Test reports, material certificates, and NDT records are compiled into a deliverable data book. Q: How do metal-seated gate valves compare to elastomer-seated valves in sour gas service?A: Metal-seated valves with Stellite hard-facing provide superior resistance to H2S embrittlement and thermal degradation compared to elastomer seals. While metal seats require higher operating torque and may not achieve zero-bubble-tight shutoff, their service life in sour environments is typically 3-5x longer than elastomer alternatives. Q: What after-sales support is available for remote locations?A: Remote technical support is available via video call within 24 hours. On-site engineering support can be arranged with 7-10 days notice. Consignment spare parts programs are available for operators with fleets of 10+ wells. Q: Is OEM interchangeability supported for existing wellhead configurations?A: Yes. Replacements can be manufactured to match existing OEM flange dimensions, bolt patterns, and ring groove profiles. Detailed dimensional data from the existing equipment is required for accurate interchangeability engineering.

Customer Background A mid-sized independent operator in the Sultanate of Oman manages a mature onshore oilfield in the Ghaba Salt Basin. The field produces 28-32° API crude from the Barik sandstone formation at well depths ranging from 2,400 to 3,100 meters. Reservoir pressure varies between 1,800 and 2,600 PSI, with H2S concentrations measured at 1.2-2.8% by volume and CO2 content averaging 3.5%. Bottom-hole static temperature reaches 98°C under flowing conditions. The operator runs 47 active production wells, of which 31 are naturally flowing and 16 require gas lift assistance. Daily gross production averages 18,500 barrels of fluid with an average water cut of 64%. The field has been on production since 2004, and the original wellhead equipment was approaching the end of its design service life. Initial Problems By early 2024, the operator recorded escalating wellhead-related failures across the field: Gate valve seat leakage: 12 wells experienced internal leakage past gate valve seats, requiring frequent injection of valve sealant as a temporary measure. Two wells had progressed to full valve body washout. Flange ring groove corrosion: RTJ flange ring grooves on 5 wells showed pitting depths exceeding 1.5 mm, compromising pressure integrity during well intervention operations. Tubing hanger neck seal degradation: Elastomeric seals in 8 tubing hangers had hardened and lost elasticity, producing measurable gas migration to the secondary seal area at casing head outlets. Operational impact: Unscheduled downtime reached 380 hours per quarter across the field. Well intervention costs averaged $42,000 per event. The operator spent approximately $680,000 annually on emergency wellhead repairs, sealant injection campaigns, and replacement components from multiple suppliers. Procurement fragmentation: Sourcing replacement parts from 5 different suppliers created inventory complexity and inconsistent material traceability across the field. Why Customer Chose This Solution The operator evaluated proposals from three API 6A-licensed manufacturers. Puyang Zhongshi Group was selected based on the following technical and commercial criteria: Evaluation CriterionRequirementZhongshi Response API 6A Monogram LicenseMandatory - PSL 2 minimumPSL 3G capability, license valid since 2002 H2S/CO2 Material ComplianceNACE MR0175/ISO 15156Material classes AA through FF, full NACE compliance Pressure Rating3,000-5,000 PSI working pressure2,000-20,000 PSI range, all verified by hydrostatic testing Forging Source TraceabilityFull mill certificates requiredHeat lot traceability from forging to final assembly Delivery Lead Time8-12 weeks from PODelivered in 6 weeks including custom material qualification Engineering SupportOn-site installation supervisionProvided commissioning engineer for first 3 wells Aftermarket CommitmentSpare parts availability - 5 years minimumEstablished consignment stock at operator's warehouse in Muscat Products Purchased ItemSpecificationQuantity API 6A Christmas Tree Assembly5,000 PSI WP, 2-9/16" nominal bore, dual-wing configuration, material class DD (sour service), PR2 tested8 sets Tubing Head Spool7-1/16" x 2-9/16", bottom flanged connection, with dual lockdown screws and secondary seal injection ports8 units Casing Head Housing9" top connection, slip-on weld bottom, with dual casing hanger landing shoulder4 units Gate Valve (Manual)2-9/16" 5K, metal-seated, rising stem, with grease injection fitting and backseat test port16 units Adjustable Choke2-9/16" 5K inlet, 2" outlet, with calibrated bean and needle tip, tungsten carbide trim8 units Ring Gaskets & Seal KitsType BX-153/BX-154, Inconel 825, with elastomeric backup seals8 complete sets Technical Solution Material Selection Process: The operator's corrosion engineering team provided produced fluid analysis data. Zhongshi recommended Class DD material per API 6A — a 75K minimum yield strength low-alloy steel with controlled hardness (HRC 22 max) per NACE MR0175 for H2S service. All pressure-containing forgings underwent 100% ultrasonic testing (UT) to ASTM A388 and magnetic particle inspection (MPI) to ASTM E709 prior to machining. Valve Design Upgrade: A key departure from the previous equipment was the specification of metal-seated gate valves with Stellite 6 hard-facing on both gate and seat sealing surfaces. The previous supplier had used elastomer-insert seats that degraded within 18-24 months under combined H2S and thermal cycling. The metal-seat design eliminated this failure mode entirely. Corrosion Protection: All exposed carbon steel surfaces received a three-coat offshore-grade paint system: zinc-rich epoxy primer, high-build epoxy intermediate coat, and polyurethane topcoat. Internal wetted surfaces were left uncoated to avoid coating delamination risk in sour service. Quality Inspection: Each Christmas Tree assembly underwent hydrostatic body testing at 1.5x rated working pressure (7,500 PSI) with a 15-minute hold period, followed by gas testing at rated working pressure with nitrogen at 5,000 PSI. Test certificates and UT/MPI reports were compiled into a data book delivered with each assembly. Packaging & Export: Each assembly was skid-mounted on steel frames with bolted tie-down points, wrapped in VCI (Volatile Corrosion Inhibitor) film, and enclosed in plywood crates with desiccant packs. All flange faces received protective covers with bolted retainers. Shipment departed Shanghai by container vessel with 24-day transit to Port of Sohar, Oman. Project Results KPIBefore RetrofitAfter RetrofitImprovement Unscheduled wellhead downtime (hrs/quarter)38015260% reduction Average well intervention cost per event$42,000$18,50056% reduction Annual wellhead maintenance spend$680,000$295,00057% reduction Gate valve replacement frequency18-24 monthsNo replacements in 14 monthsIn progress Number of active suppliers for wellhead components5180% reduction Mean time between wellhead-related interventions11 weeks35 weeks3.2x improvement The operator's production superintendent reported: "The Zhongshi Christmas Trees have been running without a single valve leak or seal issue since commissioning. Our intervention team can now focus on artificial lift optimization instead of emergency wellhead repairs." Why This Project Matters Procurement Insight: This project demonstrates that material specification — not just pressure rating — is the critical differentiator when selecting wellhead equipment for sour service. The operator's previous supplier satisfied the API 6A mechanical requirements but used materials unsuitable for the corrosive environment, resulting in chronic failures. Selection Tips for Operators: Always request complete material class certification per API 6A Annex F before issuing a purchase order Insist on UT and MPI reports for all pressure-containing forgings — not just certificates of conformity Consider consignment stock agreements to reduce inventory carrying costs and ensure spare parts availability Evaluate Total Cost of Ownership including intervention costs, not just unit price at PO stage For Artificial Lift Engineers: Wellhead integrity directly impacts artificial lift system performance. Gas migration past tubing hanger seals can artificially depress casing pressure readings, leading to inaccurate gas lift valve set-point calculations. Stable wellhead conditions are a prerequisite for reliable artificial lift optimization. Frequently Asked Questions Q: How do you determine the correct API 6A material class for sour service?A: Material class selection depends on H2S partial pressure, chloride concentration, pH, and temperature. For H2S concentrations above 0.05 psi partial pressure, NACE MR0175 applies. Class DD and EE materials are commonly specified for Middle East sour fields. Always provide your corrosion engineer with complete produced fluid analysis data. Q: What is the typical lead time for API 6A Christmas Tree assemblies?A: Standard lead time is 8-12 weeks from receipt of an approved order. Custom material grades or non-standard bore sizes may add 2-4 weeks. Expedited delivery can reduce lead time to 6 weeks for standard configurations. Q: Can existing tubing heads be reused when upgrading Christmas Trees?A: It depends on the condition of the tubing head flange face, ring groove, and lock screw threads. We recommend a dimensional inspection and NDT of the existing tubing head before committing to reuse. If ring groove pitting exceeds 0.8 mm or thread engagement is below 75%, replacement is recommended. Q: What testing is performed before shipment?A: Every assembly undergoes hydrostatic body test at 1.5x rated working pressure, gas test at rated working pressure, and function test of all gate valves (open/close cycles). Test reports, material certificates, and NDT records are compiled into a deliverable data book. Q: How do metal-seated gate valves compare to elastomer-seated valves in sour gas service?A: Metal-seated valves with Stellite hard-facing provide superior resistance to H2S embrittlement and thermal degradation compared to elastomer seals. While metal seats require higher operating torque and may not achieve zero-bubble-tight shutoff, their service life in sour environments is typically 3-5x longer than elastomer alternatives. Q: What after-sales support is available for remote locations?A: Remote technical support is available via video call within 24 hours. On-site engineering support can be arranged with 7-10 days notice. Consignment spare parts programs are available for operators with fleets of 10+ wells. Q: Is OEM interchangeability supported for existing wellhead configurations?A: Yes. Replacements can be manufactured to match existing OEM flange dimensions, bolt patterns, and ring groove profiles. Detailed dimensional data from the existing equipment is required for accurate interchangeability engineering.

Torque ring enhances the structural strength of the connection and provides axial metal to metal seal to supplement the threaded seal 1. Torque ring in the connection system is the key to enhance the connection performance of API casing method; 2. Torque ring can be easily transported to any position,and the torque ring can be easily installed into the coupling on the field oil casing by using the insertion and installation tool provided; 3. Torque ring provides an excellent connection scheme for operators who want to use casing drilling technology. It is easy to install and can be inserted by inserting the installation tool with a pneumatic wrench or hitting the tool rod.