BAILER FOR CLEANING BOREHOLE OR FORMATION OF WELL (VARIANTS) Russian patent published in 2006 - IPC E21B27/00 

FIELD: technology for extracting hydrocarbons, possible use for cleaning borehole or bed of product, or force well, in particular from precipitations (for example, sand, slurry, mechanical admixtures, mud, etc).

SUBSTANCE: bailer (variant 1) for cleaning borehole or bed of well includes a moveable hollow rod connected to pipes column and having one or several overflow channels and limited drive, body with guiding end, spiral spring and seals. Bailer is provided with support, made with one or more inlet pass channels and having radial threaded apertures for shear screws and upper external thread, support being positioned in the body and rigidly connected thereto from above, between body and support a circular pass channel is formed, while the body is made with external check valve, and moveable hollow body through its lower part is connected to gate and made with groove for shear screws, upper and lower or upper, middle and lower grooves for seals, respectively, above and below overflow channels of moveable hollow rod and has external thread, stopping collar, and is provided above spiral spring with adjusting nut with braking screws. Bailer (variant 2) for cleaning borehole or well bed includes moveable hollow rod with one or several overflow channels and limited drive, connected to pipes column, body with guiding end, spiral spring and seals. Bailer is provided with anchor with possible fastening in the shaft of well of working position of body, having one or two receiving free or spring-loaded valve and moveable hollow rod positioned in it with one or two forcing free or spring-loaded valve.

EFFECT: increased efficiency, reliability and functionality of bailer operation during cleaning of borehole or bed of extractive or force well.

2 cl, 17 dwg