Face seal high temperature sliding sleeve
A sealing sleeve and face sealing technology, applied in the directions of sealing/isolation, wellbore/well components, earth-moving drilling, etc., can solve problems such as inability to meet production, and achieve the effect of improving performance, ensuring safety, and facilitating production
Active Publication Date: 2019-03-15
SHANGHAI EXTRONG OILFIELD TECH
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Problems solved by technology
[0003] Existing high-temperature sliding sleeves can generally withstand oil and gas temperatures of 150°C to 200°C, but still cannot meet the needs of production
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[0021] The present invention will be further described now in conjunction with accompanying drawing.
[0022] see Figure 1 to Figure 9 , Figure 1 to Figure 9 Shown is an embodiment of the present invention, including an upper joint 1, a sheath 2, a spring 5, a sealing sleeve 11 and a lower joint 12, wherein an upper joint 1, a mandrel 4, a transition sleeve 6, a sealing sleeve 11, and a lower joint 12 are connected sequentially, the sheath 2 is installed on the outside to protect the above structure, a spring 5 is provided between the mandrel 4 and the transition sleeve 6, and four connected liquid holes are respectively provided on the sealing sleeve 11 and the lower joint 12.
[0023] In addition, it also includes track grooves and four evenly distributed track pins 10; wherein, the mandrel 4 is provided with track grooves surrounding its outer wall; one end of the four track pins 10 is respectively connected to the inner wall of the sealing sleeve 11, and the other ends ...
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The invention relates to a face-seal high-temperature sliding sleeve which can resist the high temperature and face high pressure. The sliding sleeve comprises an upper joint, a protecting sleeve, a spring, a seal sleeve and a lower joint. The upper joint, a core shaft, a transition sleeve, the seal sleeve and the lower joint are sequentially connected, and the protecting sleeve is mounted on the outer side to protect the structure; the spring is arranged between the core shaft and the transition sleeve, and communicated liquid passing holes are formed in the seal sleeve and the lower joint respectively; and in addition, a rail groove and a rail pin are further included. A rail groove surrounding the outer wall of the core shaft is arranged on the core shaft, and the rail groove is in a wavy shape; one end of the rail pin is connected to the inner wall of the seal sleeve, and the other end of the rail pin is inserted in the rail groove. The wall-face seal manner is adopted, the technical aim of high temperature resistance in the packing process is achieved, and the performance is improved; a structure of the rail groove and the rail pin is adopted, control over the oil and gas discharged out of the core shaft is achieved, and production is facilitated; and a corrugated pipe component effectively resists impact of external high pressure to the sealing sleeve, and safety is ensured.
Description
technical field [0001] The present invention relates to an oil extraction device, in particular to a high-temperature sliding sleeve with a surface seal that can withstand high temperature and high pressure. Background technique [0002] The high-temperature sliding sleeve is a device that needs to be used in oil exploitation. Its function is to open the liquid hole to connect the high-temperature oil and gas when it is necessary to lift the oil and gas from the well to the ground for extraction; Close the drain hole. Due to the high temperature of oil and gas, the high-temperature resistance performance that can withstand when it is sealed is an important indicator of high-temperature sliding sleeves. [0003] Existing high-temperature sliding sleeves can generally withstand oil and gas temperatures of 150°C to 200°C, but they still cannot meet the needs of production. Contents of the invention [0004] In order to solve the existing problems, the present invention aims...
Claims
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IPC IPC(8): E21B34/14
Inventor 孙德启徐国雄李楠庞超然
Owner SHANGHAI EXTRONG OILFIELD TECH