CONSTRUCTION METHOD OF DEEP WELL, PLUGGING SOLUTION FOR ITS IMPLEMENTATION AND STRUCTURE OF DEEP WELL Russian patent published in 2010 - IPC E21B33/14 

FIELD: oil-and-gas production.

SUBSTANCE: there is implemented mudding of pit-bottom zone of well in the range of bedding of all permeable beds and interlayers up to producing formation before downlifting of casing string. Additionally mudding is implemented with usage of molecular fine-particle plugging solution. Fixation of casing pipes is implemented by plugging solution density of stone of which is equal to 1.0-1.1 of average density of formations, opened by well. In structure of deep well the letter technical and production strings are equipped by fragments-insertions of specified length, allowing enough strength characteristics for operation of well, but easily destroyed by known methods. Proposed technology provides increasing of quality of fixation of casing strings and to prevent interstratal overflows.

EFFECT: increased range of application of plugging solution and increased operation time of plugging stone, included into structure of the well fragments of insertion provide ability of direct contact of plugging material with rock.

5 cl, 2 dwg