Construction of Oil and Gas Wells on Land and Sea

The paper substantiates the necessity of operational control and management of drilling parameters in order to prevent emergencies in the well, especially while drilling in a narrow range of absorption and fracturing pressures. The results of a multifactor computational experiment are presented: the dependence of the hydrodynamic pressure in the well on the consumption of the cleaning agent and on the rate of penetration. The principle of determining the actual axial load on the bit and the algorithm of the operational control and management of the drilling parameters are presented: axial load on the bit, rotational speed of the drilling tool, cleaning agent flow, mechanical rate of penetration.

Keywords: drilling parameters; operational control; directional well; equivalent circulating density; axial load; rotation frequency; mud flow rate; mechanical rate of penetration; electric centrifugal pump (ECP); hydraulic model; accident free drilling.

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UDC 622.24 DOI: 10.30713/0130-3872-2018-12-13-18

EXPERIENCE AND RESULTS OF SYSTEMATIC IMPROVEMENT OF TRADITIONAL TECHNOLOGIES
FOR OIL AND GAS WELL CONSTRUCTION (p. 13)

Vladimir Nikolayevich Polyakov,

Alexander Petrovich Chizhov

State Autonomous Scientific Institution "Institute for Strategic Studies of the Republic of Bashkortostan"

129/3, Oktyabrya str., Ufa, 450075, Republic of Bashkortostan, Russian Federation,

e-mail: intnm@ya.ru, ap4-2014@ya.ru

Gniyatulla Garifullovich Ishbaev,

LLC "Burinteh" Scientific and Production Company

4/1, Yubileinaya str., Ufa, 450029, Republic of Bashkortostan, Russian Federation,

e-mail: bit@burinteh.com

Gani Gaisinovich Gilaev,

JSC "Samaraneftegaz"

50, Volzhsky prosp., Samara, 443071, Russian Federation,

e-mail: sng@samng.rosneft.ru

Felix Rudolfovich Yakhshibekov,

JSC "Surgutneftegaz"

1, bld.1, Grigory Kukuyevitsky str., Surgut, 628415, Tyumen region, Russian Federation,

e-mail: press-ext@surgutneftegas.ru

Alexey Petrovich Averyanov

"Institute of Mechanical Engineering named after A.A. Blagonravov of the Russian Academy of Sciences

4, Maly Kharitonievsky pereulok, Moscow, 101990, Russian Federation,

e-mail: info@imash.ru

The article presents the results of application of the advanced drilling technology and oil and gas wells completion ("Multi-technology complex") based on scientific-technical principles of synchronization and coordination of thermodynamic processes of wellbores hardening and implementation of system approaches and solutions.

Brief analytical generalizations on the quality and efficiency of wells hardening, factors that violate the wells hardening technology as well as the related problems are discussed. The shortcomings of traditional technologies and the reason for their low efficiency when solving the key problems of wells construction are noted. Analytical generalizations of wells construction results, applying "Multi-technology Complex" in various mining conditions of the Russian fields are given, its advantages over traditional methods are noted. When implementing the complex during the construction of wells, there occur no various complications: blowouts, emissions, gas, oil and water manifestations, absorption, instability and hydraulic fracturing of rocks. In addition, the complex provides optimal conditions for improving the design of wells and filters, reducing the metal consumption of the structure and the time for their construction.

Keywords: complications; technological problems; quality of cementing; well construction; systematicity; complex; hydromechanical hardening of a wellbore; multi-technology; thermodynamic processes.

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UDC 622.248.23.001 DOI: 10.30713/0130-3872-2018-12-19-22

A TECHNIQUE OF PROGRAMS DEVELOPMENT OF WELLS PROFILE CALCULATION LIKE A CURVE
WITH CONTINUOUS CURVATURE ON THE EXAMPLE OF SYMMETRIC BICLOTOID (p. 19)

Alexander Mikhailovich Gusman,

Ilya Lvovich Barsky,

Anna Borisovna Levina,

Boris Rafaelovich Lalayants,

Ivan Sergeevich Sergeev,

JSC "Drilling Technique"

9, bld. 1, Letnikovskaya str., Moscow, 115114, Russian Federation,

e-mail: agusman@integra.ru, reception-bt@integra.ru, alevina@integra.ru, isergeev@integra.ru

Dmitry Nikolaevich Levitsky

Gubkin Russian State University of Oil and Gas (National Research University, NRU)

65, bld. 1, Leninsky prosp., Moscow, 119991, Russian Federation,

e-mail: levitskiy.d@gubkin.ru

At present, as a rule, composite curves, being the conjugated pieces of circles and straight-line segments, are used when projecting wellbore profiles, thus causing discontinuity in the curvature of the well profile curve. When lowering drilling or casing pipes into the well with a discontinuous curvature, the column cannot exactly follow the well shape because of its elasticity. That’s why, the column can behave uncontrollably, move away from the wall in the places of curvature rupture or, conversely, bump into the wall, bulge. It is proved in practice by complicating the works of pushing the drill-pipe string, increased wear out of the drill-pipe string in the vicinity of the curvature rupture points, etc. The authors proposed to design a well profile preserving the continuity of curvature in accordance with the natural bend of the drilling or casing string and developed a method for selecting an equation describing such a well profile and suggested replacing the circles arcs by other curves arcs, among which the curve with linearly varying curvature (in terms of drilling mechanics, linearly varying "intensity of curvature") – clothoid or biclothoid – is distinguished due to its simplicity following the circle.

Keywords: well profile; intensity of curvature; curvature continuity; clothoid; symmetric biclothoid.

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UDC 622.24(084.34) DOI: 10.30713/0130-3872-2018-12-23-29

CALCULATION THE AXIAL LOAD AND THE EXPECTED TORQUE ON A PDC BIT (p. 23)

Oleg Borisovich Trushkin

Federal State Budgetary Educational Institution of Higher Education "Ufa State Petroleum Technological University"

1, Kosmonavtov str., Ufa, 450062, Republic of Bashkortostan, Russian Federation,

e-mail: azimtrushkin@yandex.ru

The article describes a method applied to calculate the axial load on a PDC bit and the expected torque while drilling rocks of various hardness. The proposed method is based on the statistical processing of the experimental studies data of a single PDC cutter work for the destruction of a plastic-brittle medium-hard rock. Based on the results of statistical data processing with a significance level of 0.05, the regression equations of vertical pressure (indentation pressure) and horizontal pressure (cutting pressure) of a PDC cutter on the rock are obtained, depending on the radius of the cutter placement and the vertical and horizontal projections of the cutter contact area with the rock. Using the scheme of overlapping of the bottom hole with PDC bit cutters, it is proposed to calculate the vertical and horizontal projections of contact zones of all cutters and gravity centers radiuses of these areas in the AutoCAD program with the initially set penetration value during one turn. In this case, it is necessary to account of the relative position of the cutters on the bit in plan. The results of load and torque calculation for a PDC bit are presented. The obtained results are compared with the results of these parameters registration got earlier during bench drilling. The comparison provided setting the correction coefficients. It is proposed to calculate the relative values of the load on the bit and the expected torque as the ratio of the calculated absolute values to the yield strength of the rock by the stamp in the bottom hole conditions. For the specific drilling conditions, it is proposed to re-calculate the relative values of these parameters into the absolute values according with the given penetration value per one turn of a bit and the yield strength of the rock in bottom hole conditions.

Keywords: PDC bit; single PDC cutter; rock destruction; axial load on a PDC bit; expected torque; pressure of indentation of a PDC cutter; cutting pressure of a PDC cutter; the yield strength of the rock by the stamp.

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UDC 622.245.69 DOI: 10.30713/0130-3872-2018-12-30-34

REDUCTION OF TIME EXPENDITURES ON ZONES LOCAL STRENGTHENING COMPLICATED
BY PROFILE PACKERS (p. 30)

Gabdrashit Sultanovich Abdrakhmanov,

Vitaly Petrovich Filippov,

Irina Vyacheslavovna Lvova,

Sergey Leonidovich Bagnyuk,

Marat Azatovich Ismagilov

JSC "TatNIPIneft"

32, M. Jalil str., Bugulma, 432230, Republic of Tatarstan, Russian Federation,

e-mail: AbdrakhmanovGS@tatnipi.ru

Albert Airatovich Zalyatdinov

JSC "Gorizont"

6, Montazhnaya str., Bugulma, 432230, Republic of Tatarstan, Russian Federation,

e-mail: Albert-757@yandex.com

The new technology and equipment provide installation in a well a lengthy profile steel interlock during a single launch and lift operation without wearing out of the inner surface by distributing cylindrical sections with multi-section spherical sliding punches.

The use of this technology will allow strengthening of the complicated zone by lengthy profile packers (PP) within 1,5...2,0 days.

Keywords: profile packer; punches; landing head.

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UDC 622.244.442:661.842 DOI: 10.30713/0130-3872-2018-12-35-39

STUDY OF THE INFLUENCE OF THE FRACTIONAL COMPOSITION OF CARBONATE WEIGHING
MATERIALS ON THE RHEOLOGICAL PARAMETERS OF THE DRILLING MUDS (p. 35)

Ekaterina Leonidovna Leusheva,

Valentin Anatolievich Morenov,

Alexander Sergeevich Martel

St. Petersburg Mining University

2, 21st line of Vasilievsky ostrov, Saint-Petersburg, 199106, Russian Federation,

e-mail: Leusheva.ekaterina@mail.ru

The article discusses the problem of reducing the influence of clay-free drilling mud components on its rheological parameters. Calcium carbonate of various fractions is often added to the composition of such solutions as a weighting and clogging additive. It is generally assumed that weighting agents - clogging additives are rather inert substances and their addition does not affect the rheological parameters of drilling fluids.

The paper presents an assessment of the effect of the fractional composition of carbonate weighting agents on the structural and rheological parameters of a biopolymer drilling mud used for drilling productive strata. The study evaluated six types of carbonate weighting agents with an average particle size from 5 to 150 microns. Rheological curves were built and the results were evaluated.

Keywords: drilling mud; carbonate weighting agents; rheology; clogging; density of the solution.

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UDC 622.276.76.05-8-192 DOI: 10.30713/0130-3872-2018-12-40-41

CONSTRUCTION OF THE MATHEMATICAL MODEL FOR THE DURABILITY OF DETAILS
OF LIFTING MECHANISMS OF PETROLEUM EQUIPMENT (p. 40)

Fariz Muzzafar Gafarov,

Mahluqa Surkhay Rahimova

Azerbaijan State Oil and Industry University

34, Azadlyg prosp., Baku, AZ1010, Republic of Azerbaijan.

e-mail: rahimova_mahluqa@mail.ru

The lifting mechanism of drilling rigs works for a considerable part of time in non-regular loading regimes, which is determined by the nature of the tripping operations. The load variables due to the change in the length of the column have a significant influence on the productivity of drilling operations and on the durability of the units and mechanisms of the lifting mechanism of the drilling rigs, and the loading cycles of the lifting mechanism increase significantly with increasing depth of the well. The derived formulas allow to determine the longevity of details of lifting mechanisms of oilfield equipment.

Keywords: drilling equipment; durability; hook; tension; boring pipes.

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UDC 622.24.05 DOI: 10.30713/0130-3872-2018-12-42-46

RELIABILITY OF THE STEERING DIRECTION BLOCK OF DOMESTIC ROTARY
STEERABLE SYSTEM (p. 42)

Alexander Alexandrovich Melekhin,

Sergey Evgenievich Chernyshov,

Valery Matveevich Plotnikov,

Yuliya Vladimirovna Melekhina

Perm National Research Polytechnic University

29, Komsomolsky prosp., Perm, 614990, Perm krai, Russian Federation,

e-mail: melehin.sasha@mail.ru, nirgnf@bk.ru, vmplotnikov@mail.ru, melekhina.yu@yandex.ru

Rotary steerable systems are an advanced high-precision equipment used in the construction of directional wells, including those with a conventionally horizontal completion. These systems can monitor and correct the trajectory of the drilling tool movement in real time.

As part of the projects application, to obtain primary scientific results that ensure the expansion of the educational organizations participation in the implementation of the National Technological Initiative, Perm National Research Polytechnic University (PNRPU) develops the scientific and methodological foundations for creation of the domestic rotary steerable system.

The developed system creates a deflecting force on a bit as a result of a change in the swing angle of the rotating pin-connected shaft by point-the-bit principle. The construction features analysis of the existing rotary steerable systems (RSS) used in the oil and gas service market showed that one of the most critical parts of the system is a deflection unit with a control module. The article presents the results of testing of the operational algorithms of the shaft bending unit, which is provided by three interconnected systems of wedge longitudinal motion with the help of DC electric motors as well as the calculation of the bending unit reliability, with account of the maximum axial load on a bit and the maximum shaft rotation frequency. The calculation of loads occurring in pin-connected shaft joints is given as well. The operation of the control module with the motor control board that provides sequential switching on and off the electric motors in the motio unit drive to move the deflecting wedges to the predetermined position and to transmit the data about wedge position to the control board located in the telemetry system of RSS to control the well trajectory.

Keywords: rotary steerable system (RSS); well bore trajectory; deflection unit; directional drilling; horizontal well.

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UDC 622.24 DOI: 10.30713/0130-3872-2018-12-47-53

TO THE PROBLEM OF ABANDONMENT OF UNDERGROUND GAS STORAGE WELLS (p. 47)

Issenbai Sotibaevich Kaliev

JSC "Intergas Central Asia"

11, 36 str., "Bolashak" business-center, Astana, 010000, Republic of Kazakhstan

Alexander Mikhailovich Likhushin,

Alexander Borisovich Vydrik,

Olga Alexandrovna Kovalevskaya,

Andrey Vitoldovich Litvinov

LLC "Gazprom VNIIGAZ"

15, bld. 1, Proektiruemy proezd No 5537, Razvilka poselok, 142717, Razvilkovsky rural settl., Leninsky district, Moscow region, Russian Federation,

e-mail: lihushin@list.ru

The article presents a mechanism of gas demonstrations occurrence in the abandoned underground gas storage (UGS) wells. The authors specify the reasons that lead to the re-abandonment of such wells as well as describe the technologies of abandonment of wells complicated by intercolumn pressures and interlayer overflows and give examples of commercial use of technologies.

Keywords: underground gas storage (UGS) well; intercolumn pressure; formation fluid; cement stone.

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UDC 622.245.142.6 DOI: 10.30713/0130-3872-2018-12-54-59

APPLICATION OF A DRILLING PERFORATOR WITH THE ROTARY MECHANISM
OF THE WORKING PART IN PRODUCTIVE HORIZONS (p. 54)

Arsen Vladimirovich Mesropyan,

Margarita Radikovna Rakhmatullina

Ufa State Aviation Technical University (USATU)

12, Karl Marx str., 450008, Ufa, Republic of Bashkortostan, Russian Federation,

e-mail: office@ugatu.su

The efficiency of oil extraction by modern methods of industrial development is unsatisfactory throughout the world, but the demand for petroleum products grows every year. The final oil recovery is from 25 to 40 % in different countries and regions. For example, the average oil recovery is 24…27 % in Latin America and South-East Asia, 16…17 % – Iran, 33…37 % – in the USA, Canada and Saudi Arabia, nearly 40 % – in the CIS countries and Russia. It depends on the structure of oil reserves and the development methods. The development of new schemes and layout solutions, providing long and increased intensity of oil inflow to the well is required to increase this index. The problems of improving the quality of secondary opening of oil- and gas-bearing formations are considered in the paper; the existing methods and technical equipment for secondary opening of productive formation are analyzed. The arguments proving that, in view of provision of "formation-well" hydrodynamic relation, the use of drilling perforation with a rotary mechanism of the working parts is the most effective and appropriate one when working in the well fund are given. However, this method was not widely used because of long time expenditures on drilling operations and the small depth of the perforation channel that in general worsens the wells productivity. Resulting from the patent review and analysis of the applied schemes and layout solutions, a prospective drilling perforator with a rotary mechanism of the working part, which provides improvement of the hydrodynamic connection quality of a productive formation with a well and increases the oil recovery index, is proposed.

Keywords: secondary opening of formations; drilling perforation; cumulative perforation; oil recovery factor; oil recovery.

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UDC 504.75 DOI: 10.30713/0130-3872-2018-12-60-65

ANALYSIS OF EMERGENCY OIL AND OIL PRODUCTS SPILLS ON THE CONTINENTAL SHELF
AND REINFORCEMENT OF COOPERATION IN ORDER TO COMBAT THEM (p. 60)

Garry Sergeevich Oganov,

Galina Dmitrievna Vorsina

LLC "Krasnoyarskgazprom neftegazproekt"

10, Maerchak str., Krasnoyarsk, 660075, Russian Federation,

e-mail: g.oganov@krskgazprom-ngp.ru, g.vorsina@krskgazprom-ngp.ru

Elena Victorovna Bogatyryova,

Gubkin Russian State University of Oil and Gas (National Research University, NRU)

65, bld. 1, Leninsky prosp., Moscow, 119991, Russian Federation,

e-mail: shelf1998@mail.ru

One of the most important trends in the development of the modern global oil and gas industry is the reorientation to the development of offshore oil and gas fields. It entails an increase in the risk of emergencies occurrence. Whether it concerns construction, production, production operations on the platform or transportation, each of these operations represents a potential source of oil and oil product spill danger (hereinafter referred to as OOPS). And to maximally protect the personnel, marine environment from toxic effects and emergencies occurrence, it is necessary to analyze these emergency spills.

Keywords: accidents; oil tankers; well drilling accidents; pollution of sea water; operation of offshore drilling rigs.

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UDC 658.382 DOI: 10.30713/0130-3872-2018-12-66-68

CALCULATION OF THE GEOMETRIC SIZE OF THE FLAME FOR THE SCENARIOS
IN THE GROUP C₁ – THE FIRE IN THE PIT (COLUMN FIRE) (p. 66)

Arkadiy Igorevich Bykov

LLC "Gazprom transgaz Ukhta"

66, 1, Sozialisticheskay str., Ukhta, 169300, Komi Republic, Russian Federation,

e-mail: abykov@sgp.gazprom.ru

It is shown that the calculation of the geometric size of the flame of the scenarios in the group С₁ – the fire in the pit (column fire) based on a model of a cylindrical solid of thermal emitter. The main parameter determining the geometrical dimensions of the flame is the mass flow at the break, the emergency site MG.

Example calculation of the geometric dimensions of the flame of the scenarios in the group С₁ on the emergency site at break of the linear part of main gas pipeline is dedicated to this article.

Keywords: mass flow of the gas; a model of column fire; emergency main gas pipeline section.

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MEMORY OF TOFIK FATULAEVICH RUSTAMBEKOV
(p. 63)

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