Published April 2021, Pg. 14-16

Section: Well drilling

UOT: 622.276:658.58

DOI: 10.37474/0365-8554/2021-4-14-16

Efficiency of releasing stuck drilling string

J.S. Akhundov Cand. in Tech. Sc. - Azerbaijan State University of Oil and Industry

While drilling oil and gas wells, 10–15 % of open part of wellbore consists of permeable fractured reservoirs and horizons. Despite of it, 70–80 % of failures occurring in wellbore fall on the permeable suites. After sticking electrical measurement only upper interval is specified. Then an oil patch is practically installed in abnormally complicated reservoirs in the upper permeable stuck and bottomhole intervals to prevent the complications and blowout.

The drilling string often remains stuck beneath the upper suite in three-four suites to the bottomhole. It is necessary to install stepped oil bath to prevent it.

References:

1. Akhundov J.S., Hasanov I.Z. Neft ve gaz guyularinin gazilmasi. – Baki, 2015, 620 s.

2. Akhundov J.S. Gazmada bash veren murekkebleshmeler ve gezalar. – Baki: Elm, 2013.

3. Akhundov D.S., Gulizade T.E. Ustranenie oslozhneniy, proiskhodyashchikh ot osmoticheskogo davleniya, voznikayushchego v glinistykh plastakh v stvole skvazhiny // Stroitel’stvo neftyanykh i gazovykh skvazhin, 2019, No 8, s. 13-17.