Overview
A casing hanger is a specialized device used in oil and gas wells to suspend the casing string from the wellhead housing. It transfers the weight of the casing to the wellhead while maintaining a pressure seal. This component is vital for well integrity, preventing leaks and ensuring stable operations during drilling and production. Casing hangers are classified by design (e.g., slip-type, mandrel-type) and material specifications. They must withstand extreme pressures, temperatures, and corrosive environments, making material selection and engineering precision critical.
Structure and Working Principle
A typical casing hanger consists of a body, sealing surfaces, and load-bearing components. The body aligns the casing with the wellhead, while the seal (often elastomeric or metal-to-metal) isolates the annular space. Slip-type hangers use wedges to grip the casing, whereas mandrel hangers rely on threaded connections. During installation, the hanger is lowered into the wellhead, and its sealing mechanism is activated (e.g., via hydraulic pressure or mechanical set). This creates a barrier between the casing and wellhead, preventing fluid migration and supporting the casing's weight.
Key Features
Modern casing hangers prioritize durability and adaptability. High-grade materials like ASTM A694 or F22 alloy steel are common for high-pressure applications. Corrosion-resistant coatings or stainless steel variants are used in sour (H2S-rich) environments. Advanced designs incorporate lockdown mechanisms to prevent movement under thermal cycling. Dual-seal systems (primary and backup) enhance reliability, while modular designs allow integration with various wellhead systems.
Application Areas
Casing hangers are indispensable in both onshore and offshore drilling operations. They are used in vertical, directional, and horizontal wells across all phases: exploration, production, and abandonment. In subsea wells, hangers face additional challenges like hydrostatic pressure and must interface with Christmas trees. Thermal wells (e.g., steam injection) require hangers with expanded thermal tolerance to accommodate casing elongation.
Maintenance and Precautions
Proper installation is paramount to avoid leaks or casing slippage. Torque values must adhere to manufacturer specifications, and seal surfaces should be inspected for damage. Regular pressure testing verifies integrity during well servicing. For corrosive environments, cathodic protection or inhibitor treatments may extend service life. Hangers in high-temperature wells should be monitored for seal degradation over time.
B2B Procurement Guide
When sourcing casing hangers, prioritize API 6A or ISO 10423 certification to ensure compliance with industry standards. Key suppliers include Schlumberger, Baker Hughes, and Weatherford. Lead times vary but typically range from 4–12 weeks for custom orders. Procurement teams should specify well parameters (depth, pressure, fluid composition) to match hanger specifications. Bulk orders for standardized hangers may qualify for discounts, while exotic materials (e.g., Inconel) command premium pricing.
Related Manufacturers
- 主营：齿轮泵、涂装泵、化纤泵、套管油悬挂器、密封垫、涂漆泵、密封圈、密封件、热熔胶机、全氟垫圈、全氟垫片、阀门密封、涂布机泵、密封装置、树脂计量泵、齿轮计量泵、化纤计量泵、涂漆计量泵、气动点胶阀、输送计量泵、涂装计量泵、喷漆计量泵、高速旋转密封、化工设备密封、喷漆机计量泵、涂布机计量泵
- 主营：石油石化设备
- 主营：抗硫80S油管、镀铜13Cr油管接箍、耐磨油管短接、石油油管套管、抗硫80S套管接箍、石油套管短接、油套管、转换接头、油管试压堵、浮鞋、钻杆提升短接、钻杆循环接头、油管旋塞阀、钻杆护丝帽、油管接箍、浮箍
- 主营：气密扣、缩径管、扣油管、石油管、油套管、套管短接、套管接箍、无缝管、扶正器、特别扣、特殊扣、护丝帽、替代扣、由壬接头、丝堵定制、油管短接、过渡接头、油管浮鞋、油管接箍、隔热油管、钻杆变扣、油管定制、加厚短接、转换接头
- 主营：冷却塔喷头、挡水帘挡水板、冷却塔收水器、悬挂器、三盘式喷溅装置、凉水塔散热胶片、冷却塔填料
- 主营：电动平车、电动龙门架、悬臂吊起重机、悬挂器、电磁吸盘、电磁除铁器、电动葫芦、单梁起重机、龙门吊
- 主营：喷砂机、抛丸机、除锈机、悬挂器、清理机、喷砂房、喷沙房、喷砂线、手动模具、汽车模具、除锈设备、喷漆设备、液体喷砂、喷砂设备、环保设备、自动喷丸机、喷砂流水线、除锈喷沙机、数控喷丸机、钢结构抛丸、高压喷沙机、喷砂清理房、工件抛丸设备、履带式喷丸机、压铸件喷丸机、抛丸清理设备
- 主营：水泥混泥土检测、沥青检测设备、公路检测设备、悬挂器、压力机
- 主营：土工布检测仪、沥青检测仪、实验机、悬挂器、水泥砂浆抗折抗压、压力机、养护箱、管材检测设备、混凝土设备、土壤检测设备
- 主营：沥青试验系列、养护箱试验系列、陶瓷试验系列、悬挂器、土工布试验系列
- 主营：测试仪、试验机、试验箱、电工套管实验仪器、测定仪、切割机、试验仪、密度试验、乳化沥青、电动击实仪、自动拌和机、沥青车辙试验、路面材料扭剪、沥青旋转薄膜、合成材料磨损、间粘结力拉拔、混合料拌和机、粗粒土垂直渗透仪、粗粒土相对密度仪、脱模器、门窗性能检测、冻融试验箱、混凝土检测仪器、水泥检测仪器、土壤检测仪器
- 主营：曝气盘、曝气器、曝气管、悬挂器、悬挂链、曝气头、曝气膜、空气管、进气管、epdm膜片、曝气配件、组合填料、硅胶膜片、弹性填料、管道支架、曝气软管、橡胶膜片、环保填料、可调支架、斜管填料、水处理填料、水处理配件、弹性立体填料、斜管蜂窝填料、微孔曝气器
- 主营：挡渣车、喂线机、喂丝机、悬挂器、挡渣投放车
- 主营：吸附塔、冷却塔填料、冷却塔pvc填料、悬挂器、pp活性炭吸附箱、冷却塔点波填料
- 主营：110KV电缆、110KV电缆头、电缆终端、复合套管、复合套管终端、干式终端、瓷套终端、同轴电缆、绝缘接头、中间接头、户外终端、GIS终端、110KV电力电缆、110千伏电缆、YJLW03电缆、YJLW02电缆、ZR-YJLW03电缆、64/110电缆、110KV电缆附件、66KV电缆、110KV电缆终端、铝护套电缆、预制终端