BOREHOLE EQUIPMENT CENTRALISER Russian patent published in 2009 - IPC E21B17/00 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly to devices for centralising borehole equipment. Borehole equipment centraliser consists of case with a central a canal, top and bottom connection threads, top and bottom projections between each locate swage which is able to rotate on a external surface of case, sealing at the ends relatively to case, in case walls create end-to-end canals within swage limits and install slips on the its external surface evenly along perimeter. Swage between ends execute in a shape of thin-walled void cylinder with longitudinal cuts between which slips to be fixed, inside the thin-walled cylinder install elastic hose equipped with antiflow opposite to cuts, hermetically fixed to swage ends, at the same time one of the swage ends perform limited ability to move longwise towards another one. Described above borehole equipment centraliser advantages are in its simple in design and reliability.

EFFECT: centraliser provides reliable stabilisation of borehole equipment, especially in sloped and horizontal wells, avoid its fluctuation and vibration during a process, which enables to perform high quality borehole works.

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