含硫油气田铸造井口阀门的拆检研究

由于硫化氢的强烈腐蚀作用， 要求开采含硫油气田的设备和材料必须具有良好的抗硫化氢腐蚀性能。为此， 对川西含硫油气田在用的铸造井口阀门进行了拆检研究， 拆检的零件包括手轮、阀杆铜螺母、轴承座、推力球轴承、填料压盖、填料环和密封圈、阀杆、阀盖、阀板、阀体、螺栓和螺母等。拆检结果表明， 井口阀门中的某些零件存在结构设计不合理和材料选择不当等问题， 因而降低了井口阀门的抗硫化氢腐蚀能力。针对阀门零件存在的问题， 进行了初步研究，并提出若干改进意见。

Disassembling and checking cast wellhead valves for sulphureous oil and gas production

The wellhead valves servicing on sulphureous oil and gas wells in West Sichuan oilfield are disassembled and checked. Almost all of the components of the valve are checked, and the result of check shows that some of the component parts have unreasonable structures and improper materials are selected, and this results in a reduction of H 2S corrosion resistance of the valve. Solutions to these problems are offered.