Equipment and Technologies for Oil and Gas Complex

A large fleet of oil and gas field piston compressor aggregates are used in the technological processes of compressor gas-lift oil and gas production and transportation from the fields to the consumers of medium and low-pressure natural gas, as well as the transportation of associated low-pressure petroleum gas. During the past 40 years, these compressors have not shown their delivery in the process of operation according to the manufacturer's technical certificate for one known reason, that the technological parameters of pressure, volume, temperature of natural or associated petroleum gas during the operation of oil and gas wells often vary. The solution of the problem to determine the actual delivery of oil and gas piston compressor units by developing an empirical loss coefficient that takes into account the conditions of frequent changes of the technological parameters of the gas entering the compressor aggregates for its pre-combustion and introduction into the general formula for determining the delivery.

Keywords: gaslift production; piston compressor units; natural and associated petroleum gas; the empirical coefficient; technical certificate; technological parameters.

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UDC 621.438 DOI: 10.30713/1999-6934-2018-3-11-14

ANALYSIS AND DIAGNOSTICS OF GTE 6/6,3 MC GAS TURBINE UNITS (p. 11)

Alexey Igorevich Mikhailenko

Tyumen Industrial University

38, Volodarskogo str., Tyumen, 625000, Russian Federation

Practical approaches to carrying out thermal gas-dynamic diagnostics of gas turbine units (GTU) are studied in the article. The author analyzed the main approaches to diagnosing of gas turbine units, modern theoretical-methodological and applied developments in this field conducted by Russian researchers. The integral methods for assessing the technical state of GTU, the differential and partially differential methods of aggregate-by-aggregate diagnostics, the use of special software for parametric diagnostics, the use of nondestructive testing methods to determine the hidden internal defects of assemblies and aggregates. The creation and implementation of GTU parametric passport is substantiated, which in future will help the operating enterprises to evaluate the quality of repairs and to provide an effective assessment of GTU current state. The working modes of GTE 6/6.3 MC were studied. A practical example is used to consider the application of thermal gas-dynamic diagnostics in operational conditions. It required the use of a limited list of nominal and operating parameters of the drive flow-through part. Diagnostic functions were performed by the automatic control system (ACS) being a part of GTE 6/6.3 MC unit.

Keywords: gas-turbine unit; gas turbine engine; diagnostics; technology; test bench; method.

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UDC 622.691.4.05 DOI: 10.30713/1999-6934-2018-3-15-22

ASSESSMENT OF GAS EQUIPMENT CONFORMITY AT A FIELD
(GAS-LIQUID SEPARATOR) (p. 15)

Vitaly Anatolievich Yasashin,

Daria Dmitrievna Babenko

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: yasashin@rambler.ru, babenkodd@inbox.ru

Alexey Mikhailovich Sychev

JSC "Transneft Metrology"

16, bld. 1, Dobrolyubov str., Moscow, 127254, Russian Federation,

E-mail: s1968@mail.ru

Gas coming from the wells should be prepared for transportation to the end user. Presence of liquid hydrocarbons or moisture, aggressive and mechanical impurities in gas enhances corrosion, increases power consumption of compressors and helps blocking of the lines of control-measurement and control devices. In addition, dust and mechanical impurities promote the wear-out of equipment, and, depositing on heat exchangers surface, worsen their thermal characteristics. All this reduces the reliability of the technological systems operation, increases the possibility of emergency situations at compressor stations and gas pipelines.

To remove harmful ingredients from the raw materials, gas-liquid separators are installed directly in the deposits.

The constructive scheme of gas-liquid, vertical, vortex-type SCV separator is presented in the article as the object being the first stage of gas treatment.

The domestic standards requirements for gas-liquid separators in the field of testing with consideration of bench test base are analyzed. Within the framework of the proposed certification tests for conformity assessment, the following tests are presented: tests of separating unit quality assessment by the separation degree, leak testing, welding seam quality for strength.

A comparative analysis of the domestic gas-liquid separator with its foreign analogue is carried out.

Keywords: gas-liquid separator; quality; standard; testing; oil and gas equipment; certification.

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UDC 622.276.56.05 DOI: 10.30713/1999-6934-2018-3-23-26

INNOVATIVE DUAL PRODUCTION TECHNOLOGY FOR THE EQUIPMENT
OF VERTICAL MULTI-LAYER WELLS (p. 23)

Vladimir Nikolaevich Petrov,

Vladimir Borisovich Osnos

TatNIPIneft, PJSC "Tatneft" named after V.D. Shashin

32, M. Jalil str., Bugulma, 423200, Republic of Tatarstan, Russian Federation,

e-mail: petrov@tatnipi.ru

Today, modern dual operation technologies of two or more layers by a single well are widely used in oil and gas industry to develop multi-layer fields. However, the technologies, well-known nowadays, applied for liquid dual production, doesn’t allow to operate a production well without pulling out the downhole equipment used for dual operation. That’s why to increase the technical-economic efficiency of the development, the paper presents an innovative dual completion technology as an innovative technical solution. The main technical problem of the presented technology is simplification of well servicing and saving of time when switching over the valves through exclusion of tripping operations.

Keywords: dual production; multi-layer well; inflow control valve; productive layer; connection; packer.

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UDC 622.276.054.23 DOI: 10.30713/1999-6934-2018-3-27-31

TECHNOLOGY OF ELECTRIC CENTRIFUGAL PUMPS OPERATION
WITHOUT SCALING (p. 27)

Adib Akhmetnabievich Gareev

JSC "Surgutneftegas"

12, Entuziastov str., Nizhnesortymsky poselok, 628447, Surgutsky district, Tyumen region, Khanty-Mansi Autonomous territory – Yugra, Russian Federation,

e-mail: adibg@mail.ru

The paper is a continuation of the idea, previously developed by the author, namely, the theory of salt deposition on the heated surfaces during their contact with the salt brines, such as produced waters. The possibilities of operation of centrifugal pumping units without salt deposition by means of the pump heating mode regulation are analyzed.

Keywords: operation of the complicated fund of wells; electric centrifugal pump of low productivity; salts deposition in electric centrifugal pump units; regulation of the operation technological mode.

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UDC 622.276.054.3 DOI: 10.30713/1999-6934-2018-3-32-35

ERRORS WHEN TREATING THREADED JOINTS OF TUBULAR GOODS (p. 32)

Mikhail Zaurbekovich Khostikoev,

Dmitry Nikolaevich Levitsky,

Igor Nikolaevich Karelin

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: khostikoevmz@mail.ru

Vladimir Anatolievich Timiryazev

MSTU "Stankin"

3a, Vadkovsky per., Moscow, 127055, Russian Federation

Most of the threads of pipes used in the oil industry are conical. During operation, threaded joints of tubular goods are subjected to static and dynamic alternating loads, while the threaded joint strength during its operation is reduced due to the thread intensive wear out.

Cutting of all kinds of tubular goods conical threads is performed mainly by turning and consists of the following three stages:

1. The stage of the unsteady process (the stage of the tool insertion – on one-two turns of a thread, following the lead-in chamfer);

2. The stage of the steady-state process (the process of cutting the main part of the thread);

3. The stage of the unsteady process (the stage of the tool output – the last one-two turns of the thread before the output facet);

Dynamic errors at the stage of the threading unsteady process are caused by a simultaneous change in the axial (P_x) and radial (P_y) cutting force constituents and change of the technological system elastic release corresponding to them. During treatment, these errors are summed up: errors of the step and the shape of the thread profile (P_x constituent) are summed up with the errors of the thread diametrical sizes (P_y constituent).

To eliminate the treatment errors, it is necessary to account of the radial releases values of the tool when it is set to its starting position to fulfil any longitudinal passage as well as the values of the axial releases of the tool during the cutting and exit stages (within the first and the last rotations of the workpiece).

The researches helped to determine the mechanism of occurrence of dynamic treatment errors at the unsteady threading stage and the possibility to control the accuracy of formation of threads diametrical dimensions and steps. The nature and the method of continuous active influence on the resulting thread processing errors are determined, based on the compensation of radial and axial elastic movements of the tool by means of the current correction of the values of its transverse and longitudinal motions.

Keywords: threading; threads treatment errors; tool elastic movements; dynamic errors of threading; compensation of treatment errors.

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UDC 66.074 DOI: 10.30713/1999-6934-2018-3-36-38

IMPROVEMENT OF GAS CLEANING INSTALLATION
FROM CARBON DIOXIDE (p. 36)

Alexey Efstafievich Nizhnik,

Arambiy Aslanovich Paranuk,

Vitaliy Alexeevich Khrisonidi

Maikop State Technological University

11, Syazi str., Yablonsky settlement, 385140, Republic of Adygea, Russian Federation,

e-mail: rambi.paranuk@gmail.com, comhrisonidi_vital@mail.ru

This article describes a modernized scheme of methanol (CH₃OH) absorption to clean the associated petroleum gases and natural gas with high content of carbon dioxide CO₂ as well as the subsequent conversion of CO₂ into methanol and return of the product obtained for technological needs. A universal technological scheme has been developed that can be applied in most oil and gas fields, with an increased degree of oil and natural gases dehydration through the introduction of some technical solutions.

The technological scheme proposed by the author of the article is based on a sufficiently high dehydration of methanol by means of an additional adsorption drying unit of gas on CaA brand zeolites that allow achieving high values of gas drying after absorption.

Keywords: adsorption; zeolite of CaA brand; absorber; methanol; natural gas; associated petroleum gas; high pressure column; carbon dioxide.

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UDC 622.24.05 DOI: 10.30713/1999-6934-2018-3-39-43

VIBRATION DAMPER-CALIBRATOR (p. 39)

Rodion Mikhailovich Bogomolov

Samara State Technical University

244, Molodogvardeiskaya str., Samara, 443100, Russian Federation

Dmitry Yurievich Serikov

Gubkin Russian State University of Oil and Gas (NRU)

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

е-mail: serrico@rambler.ru

The paper presents the results of the work aimed at improving the design of the near-bit vibration dampers-calibrators.

When working at the bottom of a drilling tool, the drill string constantly experiences strong longitudinal and lateral vibrations, greatly accelerating the tool wear-out and reducing drilling indicators. If, at the same time, the vibrations go into the resonance, the rigidity of the drilling tool catastrophically decreases. To reduce the harmful effect of longitudinal and lateral vibrations, a variety of support-centering elements – centralizers, calibrators, stabilizers, and other devices are introduced into the assembly of the drill string.

This paper presents the results of researches and development of the vibration dampener-calibrator innovative design, which allows to ensure, when drilling deep wells, simultaneous calibration the borehole wall and to significantly reduce the lateral vibrations of the drill string. This helps to increase the rigidity of the drilling tool and the efficiency of drilling.

Keywords: rolling-cutter drill bit; PDC diamond bit; centralizer; calibrator; vibration damper; longitudinal and lateral vibrations of the drill string; near-bit shock absorber for roller drilling; washing channels in the devices bodies; elastic spring devices; "dovetail"-type details connection; drill string arrangement.

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UDC 622.242.2 DOI: 10.30713/1999-6934-2018-3-44-47

ESTIMATION OF TORSIONAL VIBRATIONS
OF DRILLING RIGS MECHANICAL DRIVE (p. 44)

Alexey Petrovich Evdokimov

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: a_evdo@mail.ru

The article presents the results of calculation of the torsional vibrations of the elements of drilling rigs power drives with different torsional stiffness of elastic elements of airclutches. According to the obtained results, the choice of elastic elements depending on their torsional stiffness is justified. The basis for the choice of shells are the results of calculations of the resonance amplitudes of torsional vibrations.

Keywords: elastic element; airclutch; amplitude; torsional vibrations; resonance; dynamic moment.

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UDC 622.24.051 DOI: 10.30713/1999-6934-2018-3-48-54

IMPROVEMENT OF THE GEOMETRY OF CUTTING STRUCTURES
OF A ROLLING-CUTTER PILOT DRILL BIT AND A REAMER (p. 48)

Dmitry Yurievich Serikov

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: serrico@rambler.ru

The results of the work aimed at improving the cutting structures geometry of the drilling rig, consisting of a roller-cutter pilot drill bit and a reamer are presented. Based on the comparative analysis of the kinematics of the cutting structures of the pilot drill bit and the near-bit rolling-cutter reamer, it was established that, as a rule, the vertex crowns of the drill bit cutting structures work with the cutting structures slipping while the peripheral ones in the slowing-down mode. However, as soon as these rolling cutters are placed at a greater distance from the rotation axis of the drill string, the picture changes dramatically. In some cases, the vertex crowns begin slowing down, and the peripheral ones work in the slipping mode. This is explained by the fact that when the rolling cutter is removed (preserving the value of inclination of the bit leg axle relative to the axis of rotation of the drill string rotation), the position of the axis instantaneous rotation changes.

One of the promising ways to increase the efficiency of the bottom-hole zone cleaning is to equip the rolling-cutter drill tools with helical drill bit cutting structures. This type of drill bit cutting structures makes it possible to convert toothed crowns of cutting structures into mini-screws, which mechanically evacuate the sludge in the given direction in the areas of reduced flow rates of the washing liquid. If the spur cutting structures work with the formation of a uniform clamp and an equilateral dump, then the helical cutting structures, from the first moments of inserting the cutting structure into the bottom-hole surface, form a cone-shaped clamp, with the primary heap of the removed rocks in the direction of the inclination of the cutting structures teeth. This allows not only to reduce the bending loads acting on the tooth during its operation, but also to set the direction of the slime removal.

To increase the efficiency of joint operation of the pilot rolling-cutter drill bit and the reamer, new designs of a rolling-cutter drill bit and the reamer with helical cutting structures gear were developed due to the increase in the destructive power of their teeth cutting structures and better cleaning of the bottom-hole from the destroyed rock.

The practical use of a pilot rolling-cutter drill bit and a reamer of new geometry of helical cutting structures, which provides a more efficient mechanical and hydraulic removal of slime from the surfaces of annular sections of the large diameter bottom-holes will increase the penetration and mechanical speed of drilling large diameter boreholes, thus reducing the cost of drilling operations.

Keywords: rolling-cutter drill bit; instantaneous rotation axis; helical cutting structures; rolling-cutter reamer.

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UDC 620.193.7 DOI: 10.30713/1999-6934-2018-3-55-59

IMPROVEMENT OF ELECTRICAL PROTECTION
OF UNDERGROUND METAL STRUCTURES (p. 55)

G.G. Ismaylova, N.G. Kutukova

Azerbaijan State University of Oil and Industry

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

e-mail: gulgaz77@mail.ru

The article considers various factors influence on the corrosion processes occurring in underground metal pipelines. Such factors are the Earth electrical resistance, humidity, distance from the compressor station. Based on the experimental data, curves are built and the corresponding formulas are obtained, the optimal variants of electric protection are proposed as well.

Keywords: corrosion rate; corrosion failure; metal pipelines; soil properties; potential.

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UDC 621.6 DOI: 10.30713/1999-6934-2018-3-60-67

MODERN CONSTRUCTION OF A COMPACT VALVE
FOR PIPELINES TUBING (p. 60)

Dmitry Alexandrovich Ivashov,

Boris Viktorovich Lonkin,

Alexey Pavlovich Grigoriev

LLC "CNIPI STARK"

7, office 407, Bolshoy Strochenovsky per., Moscow, 115054, Russian Federation,

e-mail: d.ivashov@instark.ru, b.lonkin@instark.ru, a.grigorev@instark.ru

Radik Minneakhmetovich Giniyatov,

Maxim Nikolaevich Kazantsev,

Ilya Alexandrovich Flegentov

LLC "Research Institute of "Transneft"

47A, Sevastopolsky prosp., Moscow, 117186, Russian Federation,

e-mail: GiniyatovRM@niitnn.transneft.ru, KazancevMN@niitnn.transneft.ru, FlegentovIA@niitnn.transneft.ru

This article presents the main specific features of the compact valve modern design, used on the pipeline tubing for a product’s pumping out/pumping/admitting/discharging into the pipeline during planned and emergency work. Proceeding from the peculiarities of the pipelines tubing operation, the basic requirements for the pipeline valves, used during the work on them, are formed. The article presents the following: the main requirements for the reinforcement used on the pipeline tubing; a comparative analysis of the pipeline valves constructions used on the pipeline tubing with the developed constructions of a compact valve. Based on the analysis of the basic requirements for pipeline valves and the analysis of pipeline valves constructions for tubing, DN 200 PN 12,5 MPa compact gate valve for pipeline tubing with a plane-parallel valve assembly was developed. Some specific features of functioning of the "slide-saddle" sealing pair of the compact valve for the pipelines tubing are considered. The experimental-construction work resulted in the development of design documentation and manufacturing of DN 200 PN 12,5 MPa, sample which passed over the acceptance tests according to the program and the acceptance test procedure were developed.

Keywords: pipeline fittings; compact valve; gate valve; pipeline tubing; pipeline; locking element.

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UDC 622.692.6:629.463.32.004.55 DOI: 10.30713/1999-6934-2018-3-68-72

MODEL OF CONTROL OF SAFETY FOR PROCESS
OF CLEANING OFF PETROLEUM RESIDUES FROM TANKS
AT THE STEAM WASHING RAILWAY STATION "OSENTSY" (p. 68)

Galina Borisovna Lyalkina,

Anastasiya Anatolevna Smirnykh

Perm National Research Polytechnic University (PNRPU)

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

e-mail: gblyalkina@mail.ru, bg@pstu.ru

The problem of preventing human and material losses at oil and gas complex enterprises remains topical. It requires the development of models for managing the safety of oil refining and transportation processes, including the cleaning of wagons from residual oil products and other dangerous goods and preparing them for further operations.

The article proposes a model for managing the safety of the technological process for cleaning wagons from oil residues at the "Osentsy" steam washing station (SWS) of the Sverdlovsk Branch of the Russian Railways.

The register of the basic industrial situations is compiled, the analysis of main technological processes and managing processes are carried out such as: delivery and moving of wagons, technical and commercial inspections, possible repair of wagons, definition of a sort of cargo, degassing, cold and hot processing, internal and external cleaning of tanks, etc. The main groups of causes leading to incidents and possible emergency situations (ES) are identified. These are: unauthorized movement of rolling stock when the wagons are loading and fenced, violation of the technology during the laboratory analysis and violation of the safety rules during physical and chemical treatment of tanks, as well as other violations of labor protection requirements by station employees. The process of washing and streaming works for cleaning of tanks from the remains of oil and other dangerous products at the railway station is under consideration. A model for managing the safety of the technological process for cleaning wagons at the steam washing station "Osentsy" of the Sverdlovsk branch of the Russian Railways is proposed. A list of the main production situations is compiled, an analysis is maid of possible ways of developing these situations, and the causes leading to incident and possible emergency situations are identified.

Based on the analysis of the identified interrelationships between technological situations and possible process impacts, a safety control model for the technological process at the steam SWS is constructed. On the basis of the model, a number of technical and organization measures are proposed to improve the process of managing the safety at the SWS.

Keywords: oil and petroleum products; cleaning of tanks from the remains; washing and steaming station; incidents and emergency situations; model of control of safety.

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