US 12,084,951 B2
Method for interval action on horizontal wells
Alexandr Leonidovich Zhelonkin, Almetievsk (RU); Ilshat Damirovich Vakhitov, Almetievsk (RU); Vitaly Petrovich Filippov, Bugulma (RU); and Gabdrashit Sultanovich Abdrakhmanov, Moscow (RU)
Assigned to TOTA SYSTEMS LIMITED LIABILITY COMPANY (TOTA SYSTEMS LLC), Moscow (RU)
Appl. No. 17/634,636
Filed by TOTA SYSTEMS LIMITED LIABILITY COMPANY (TOTA SYSTEMS LLC), Moscow (RU)
PCT Filed Jul. 17, 2020, PCT No. PCT/RU2020/050160
§ 371(c)(1), (2) Date Feb. 11, 2022,
PCT Pub. No. WO2021/029786, PCT Pub. Date Feb. 18, 2021.
Claims priority of provisional application 62/886,367, filed on Aug. 14, 2019.
Prior Publication US 2022/0325605 A1, Oct. 13, 2022
Int. Cl. E21B 27/00 (2006.01); E21B 33/124 (2006.01); E21B 34/06 (2006.01); E21B 43/12 (2006.01); E21B 43/14 (2006.01); E21B 47/06 (2012.01)
CPC E21B 43/14 (2013.01) [E21B 27/005 (2013.01); E21B 33/124 (2013.01); E21B 34/066 (2013.01); E21B 43/126 (2013.01); E21B 47/06 (2013.01); E21B 2200/04 (2020.05)] 17 Claims
OG exemplary drawing
 
1. A method of treating intervals in a horizontal well in connection with a preliminarily bored horizontal segment of the well, the segment having been constructed through a formation with various permeability zones, wherein a geophysical survey is conducted and a number of, and sizes for, oil recovery intervals of various categories are determined, the method comprising:
lowering down into the horizontal segment, and installing, a tail pipe or a tail filter of a casing string with first packers and a drive shoe arranged on the casing string in accordance with the sizes of the oil recovery intervals;
lowering down into the horizontal segment, and installing inside the tail pipe, an assembly on a pipe string, the assembly including electric valves with pressure and temperature sensing devices, a cable and second packers, the second packers being arranged opposite to corresponding first packers and hermetically separating an annular space of the horizontal segment, wherein a pump in a casing rigidly connected with the pipe string is arranged inside the casing string;
while lowering the assembly down into the well, opening the electric valves to help fill a tube side of the pipe string with a product of the well, and a circulation valve being closed;
monitoring data obtained from the sensing devices; and
injecting a chemical composition into one or more of the intervals of the horizontal segment to periodically treat the formation.