HORIZONTAL WELL CONSTRUCTION METHOD Russian patent published in 2014 - IPC E21B7/04 E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and may be used in construction of horizontal wells. The concept of the invention is as follows: horizontal well construction method includes drilling of a vertical section, a curved section and horizontal section, running of the casing pipe to the well and cementing. According to the invention drilling of a horizontal section is made with input to the productive stratum. Production string is run in with filtering lower part having length not less than the depth of input to the productive stratum. The packer is set above the filtering part of the string. A circulation valve is set above the packer and tubular annulus is cemented through the circulation valve. Upon cementing the packer is drilled out and drilling is continued with entry to the below stratum, rising to the productive stratum and drilling in the productive stratum.

EFFECT: improving increase of the production part of the well, area of its supply and increase of the well flow rate.

1 ex, 1 dwg