According to this problem, casing oil stolen prevention sealing valve was developed, matching with down-hole oil-gas separator and gas lift valve lift technology.
针对这一难题，研制了套管防盗油密封阀，并配套应用了井下油气分离器与气举阀助流举升工艺技术。
2
This sealing slurry, DL-1, has used at Binnan district of Shengli in a lot of Wells for repairing casing damages with success.
堵漏封窜剂dl 1已在胜利油田滨南油区多口井上用于封堵套管漏失和管外窜槽，效果良好。
3
The casing hanger provides a means of ensuring that the string is correctly located and generally incorporates a sealing device or system to isolate the casing annulus from upper wellhead components.