| 摘要 |
FIELD: applicable in completion, servicing and workover of oil, gas and injection wells and removing of sand plugs from bottom-hole. SUBSTANCE: device for bottom-hole cleaning has hollow body, guide bushing in the upper part of body, plunger and receiving valve installed on lower end of body. Plunger is connected with lower opened end of tubing string. Side walls of lower part of plunger brought into body have radial through holes. Installed between upper end of body and circular bead is precompressed spring. Body in the lower part above receiving valve is separable and introduced into body of receiving valve for axial motion. Located on the outer surface of body between stop bead and receiving valve is packer seal resting on bottom-hole. When receiving valve comes in contact with bottom-hole, plunger moves downward. Under the weight of tubing string, packer seal is tightly pressed to tubing string to built up high pressure in space under packer. Fluid together with sand, rock cuttings promptly fill the internal surface of the device and tubing. EFFECT: higher efficiency. 1 dwg |
