УДК 622.22 + 551.326

ASSESSMENT OF THE AUTUMN PROCESSES IMPACT ON ICEBERG SAFETY OF EXPLORATION DRILLING

Efimov Ya.O. – expert, Arctic Research Centre, efimov.yo@gmail.com

Key words: drilling, shelf, safety, icebergs.

Environmental factors (wind, sea waves, visibility) have a decisive influence on operations of icebergs detection and deviation from offshore oil and gas facilities [1]. Based on the results of experiments performed during 2012-2017 [2], [3] the limiting parameters of the environment can be defined for safe marine operations; in the paper it is considered impossible to perform offshore operations when these limit values are exceeded. The article discusses realization of offshore operations only for open water conditions from July to October, which coincides with the timing of geological exploration (primarily prospecting and exploration drilling) on the Russian Arctic shelf.

УДК 622.24

USE OF SHOE SMART REAMER SHOE DEVICES EXPERIENCE FOR RUNNING CASING TO HI-TECH WELLS

Litvinov L.N. – Candidate of Technical Sciences, Associate professor, National University of Oil and Gas «Gubkin University», lnlitvinov1952@mail.ru lnlitvinov1952@mail.ru

Lubyanyy D.A. – Candidate of Technical Sciences, Associate professor, National University of Oil and Gas «Gubkin University», lubyanyy.d@gubkin.ru

Abed Fattah Muriby – Dосtor of Technical Sciences, Chairman, Wildcat Oilfield Services, chairman@wildcatos.com

Mohamad El Dhaybi – Directional drilling engineer, Wildcat Oilfield Services, noor@wildcatos.com

Key words: fastening of wells, casing, smartrimmer.

Features of casing descent technology to the hi-tech wells (VTS) and experience of use of special shoe devices facilitating this process are considered in this article. Hi-tech wells are understood as a kind of multibarrelled wells and multi-branch wells with irregular space borehole axis.

УДК 622.24

ACHIMOV HORIZONTAL WELL DRILLING TECHNOLOGY USING MULTIPLE-STAGE WELL INTERVENTION. CHALLENGES. ANALYSIS. SOLUTIONS.

Dokunikhin V.B. – General Director of ERIELL NEFTEGAZSERVICE LLC, vitaly.dokunikhin@eriell.com

Milenkiy A.M. – Candidate of Technical Sciences, Chief Engineer of ERIELL NEFTEGAZSERVICE LLC, aleksandr.milenkiy@eriell.com

Yavorskiy A.А. – Chief Production Engineer of ERIELL NEFTEGAZSERVICE LLC, alexandr.yavorskiy@eriell.com

Key words: Achim deposit, subhorizontal well, Multiple-stage well intervention, “Technical limit”.

One of the most relevant engineering tasks in the Fuel & Energy Complex is the construction of geologically and technologically complex wells. The complexity of near-horizontal wells’ construction at the Achimov formation is related to the great depth of productive strata, abnormally high formation pressure and temperatures, while the Achimov deposits often have significant differences in pressure and permeability, which calls for using the drilling mud density in a rather narrow "corridor".

The article describes new technologies for the development of Hard-to-recover reserves at the Achimov formation in Western Siberia on the example of the work done by ERIELL NEFTEGAZSERVICE LLC at the Urengoyskoye field. Proven technological solutions for drilling near-horizontal wells and completing wells using the multi-stage hydraulic fracturing in conditions of abnormally high formation pressure are presented.

УДК 622.24

RATE OF PENETRATION INCREASE AS A RESULT OF NEGATIVE-PULSE TELEMETRY APPLICATION WITH COMPRESSED DATA TRANSMISSION

Garipov A.V. – Solution Engineering Manager, Halliburton, Andrey.Garipov@halliburton.com

Galimkhanov A.R. – Well Engineer, Halliburton, Aydar.Galimkhanov@halliburton.com

Tur D.Yu. – Drilling Engineer, Halliburton, Dmitry.tur@halliburton.com

Khalilov A.S. – Drilling Technical Advisor, Halliburton, Almaz.Khalilov@halliburton.com

Pogurets V.V. – Director of Drilling and Workover Operations, JSC “Yamal LNG”, Valeriy.Pogurets@yamalspg.ru

Rybalkin A.A. – Deputy Director of Drilling and Workover Operations, JSC “Yamal LNG”, Alexey.Rybalkin@yamalspg.ru

Yavorskiy A.A. – Chief Production Engineer, ERIELL NEFTEGAZSERVICE LLC, alexandr.yavorskiy@eriell.com

Maltsev V.A. – Chief specialist of technological service, ERIELL NEFTEGAZSERVICE LLC, Vladimir.maltsev@eriell.com

Key words: telemetry system on negative pulses, compression data transmission, MWD / LWD, ROP and Run Speed increase, data transmission density.

The article describes new technical and technological solutions which decrease limitations on the log data transmission during horizontal wells drilling. This increase the rate of penetration (ROP) without losing the quality of the data from the downhole sensors. The authors describe the principle of operation of telemetry on negative pulses and the technology of compression data transmission. The article also presents the results of 6 horizontal wells construction.

УДК 622.24

HANDLING HIGH-INTENSITY BRINE INFLUXES IN A SALT FORMATION USING MANAGED PRESSURE DRILLING TECHNOLOGY

Amangeldiyeva D. – Managed Pressure Drilling application engineer, Weatherford, diana.amangeldiyeva@weatherford.com

Aliyeva A.A. – Managed Pressure Drilling application engineer, Weatherford, aida.aliyeva@weatherford.com

Key words: drilling, brine, brine influx, managed pressure drilling, drilling techniques, types of drilling, drilling complication, losses.

Nowadays operators and rig contractors pay substantive awareness on the effectiveness and safety of operations. Meantime in the drilling industry almost every job comes along with hazards, which with the wrong line of approach might lead to unforeseen expenses and extensive non-productive time. Weatherford’s Managed Pressure Drilling services can help to enhance drilling effectiveness and ensure wellbore integrity with the help of advanced solutions, adapted to maintain wellbore stability throughout the wellbore.

This case study describes the approach taken during drilling 11-5/8” hole section through salt formation on the field X in West Kazakhstan Oblast (Region) where high intensity brine influx, and subsequent flow has been encountered.

УДК 622.243.134

“U-TUBE” EFFECT DURING DUAL GRADIENT DRILLING AND DRILLING UPPER INTERVALS OF OFFSHORE WELLS

Ganiev R.I. – Technical Consultant of Dual Gradient Systems LLC, radmirganiev@mail.ru

Luc DeBoer – CEO of Dual Gradient Systems LLC, Deboerlucas30@gmail.com

Agliullin A.H. – Doctor of Technical Sciences, Professor, Ufa State Petroleum Technological University, CEO of Center for Engineering Technologies LLC, dir@et.center dir@et.center

Ismakov R.A. – Doctor of Technical Sciences, Professor. Head of “Drilling oil and gas wells” Department, Ufa State Petroleum Technological University, ismakovrustem@gmail.com

Key words: u-tube, pilot hole, dual gradient drilling, flowstop, downhole valve, riserless drilling, offshore drilling.

The article describes problems associated with “U-tube” effect that occur when drilling pilot hole and upper intervals in offshore wells as well as during dual gradient drilling. Authors propose using a special bottom-hole valve “FlowStop” which allows controlling “U-tube” effect. Results of cost-benefits analysis, laboratory and field tests are presented that proving feasibility of using valve in offshore drilling.

УДК 622.24

THE IMPROVED THREADED TOOL JOINT OF DRILLING PIPES

Korabelnikov M.I. – Candidate of Technical Sciences, associate professor of the Department "Oil and Gas Engineering", a branch of FSBEI HE Tyumen industrial university in Nizhnevartovsk, korabelnikovmi@mail.ru

Bastrikov S.N. – Doctor of Technical Sciences, the Professor of the Department "Drilling of oil and gas wells", FSBEI HE Tyumen industrial university, ovchinnikovvp@tyuiu.ru ovchinnikovvp@tyuiu.ru

Ovchinnikov V.P. – D.Sc. in engineering, Professor, Industrial University of Tyumen, ovchinnikovvp@tyuiu.ru ovchinnikovvp@tyuiu.ru

Aksenova N.A. – Candidate of Technical Sciences, associate professor of the Department "Oil and Gas Engineering", a branch of FSBEI HE Tyumen industrial university in Nizhnevartovsk, na-acs@yandex.ru

Key words: well, drill pipes, threaded joint, accidents, nipple, coupling, torque at screwing, sealness, wear resistance, operational life.

The improved threaded conical tool joint of drilling pipes applied while drilling deep and complex oil and gas wells as well as in the construction of side boreholes and multi-hole wells is designed by authors.

The application of developed threaded lock joint of drilling pipes while boreholes deepening will allow increasing the solids-carrying capacity of the joint, sealness and increasing its operational life.

УДК 622.245.422

STUDY OF REINFORCED EXPANDABLE CEMENT MATERIALS

Egorova E.V. – Candidate of Technical Sciences, Director of JV "Caspian Educational Center of Oil and Gas Technologies", Astrakhan State Technical University, egorova _ ev@list.ru

Minchenko Yu.S. – Candidate of Technical Sciences, Associate Professor of the department of development and operation of oil and gas fields, Astrakhan State Technical University, minchenko.yuliya@inbox.ru

Belozerov V.S. – Doctor of Geological Sciences, Director of the Institute of Geosciences of the North Caucasian Federal University, vbelozerov@ncfu.ru

Key words: cement slurry, cement stone, dispersed reinforcement, basalt fiber, polypropylene fiber, coefficient of linear expansion, crack resistance.

High quality of well casing will be ensured only with reliable contact of the cement stone with its limiting surfaces (casing and rock), therefore, the use of expanding plugging materials during cementing is generally accepted. At the same time, it is obvious that their application will not give positive results in intervals with a thick mud cake or in intervals of caverns, i.e. where the space for expansion is greater than the magnitude of the expansion itself. When the cement slurry hardens with a fibrous filler, a dispersed-reinforced cement stone is formed, which is characterized by increased strength and crack resistance. The article examines the influence of basalt and polypropylene fibers on the deformative properties of cement stone.

УДК 622.245

EXPERIENCE OF COMPLETION OFFSHORE WELLS IN THE AZERBAIJANI SECTOR OF THE CASPIAN SEA

Mamedbekov O.K. – Doctor of Technical Sciences, Professor, Technical Director of Frontier International LLC, omamedbekov@nt-serv.com

Bessel V.V. – Candidate of Technical Sciences, Associate Professor, Executive Vice President of NewTech Services LLC, vbessel@nt-serv.com

Key words: offshore well, hydraulic dual-cone liner hanger, auto-fill float shoe, auto-fill float collar, maximum allowable liner run-in-hole speed.

The technical, technological and geological conditions for well drilling in the offshore fields of the Azerbaijani sector of the Caspian Sea have a number of features, such as high reservoir pressures, the presence of loss formations, large liner installation depths and small clearances between the liner and the borehole wall. Specialists of NewTech Services LLC, participating in well casing operations with liners, apply an individual, adaptive approach to the conditions of each offshore well, which allows achieving conditions acceptable for the Customer. The experience of well casing in the fields with complicated mining and geological conditions “Umid” and “Bulla Deniz” is presented, where, in order to avoid possible jamming of the liner in the casing during running, the standard outer diameter of the liner hanger assembly was reduced without changing the strength characteristics. The applied liner casing technology in conditions of small clearances and possible troubles during the running process ensured a surging and swabbing effect decrease, string auto-filling during running, the pressure equalizing between the tubular and annular spaces, the possibility of reverse circulation in the event of well flow, well casing performing in loss formation intervals, and, ultimately, an increase of the liner run speed.

УДК 621.59

CHANGE IN THE PERFORMANCE INDICATOR OF THE LIQUEFIED NATURAL GAS PLANT DEPENDING ON THE INFLUENCE OF THE METEOROLOGICAL FACTOR

Baranov L.A. – Doctor of Technical Sciences, Professor, Head of the Department "Information Management and Security", FSBEI HE "Russian University of Transport RUT (МIIТ)», baranov.miit@gmail.com

Pershin N.V. – Chief marine surveyor of PJSC «Gazprom», nikita.pershin@mail.ru

Key words: liquefied natural gas, plant, production, processing, traffic diagram, environmental conditions, liquefied gas tanker, automated control system.

The article provides a statistical analysis of the monthly production of liquefied natural gas at the production complex of the «Sakhalin 2 – Prigorodnoye» project and the average monthly external temperature obtained from the Korsakov meteorological station over 8 years. Based on the initial statistical data, estimates of the mathematical expectation, variance, standard deviation of production volume and external air temperature for each month of the 8-year period were obtained. These estimates were also received during statistical material processing for each year of the 8-year period. To assess the linear statistical relationship between the production volume and the average monthly external temperature, estimates of the correlation coefficients were obtained. The analysis of the results allowed to conclude that there was a linear statistical relationship between the productivity of the plant for the production of liquefied natural gas and the average monthly external temperature for each year.