ISSN 1999-6934

Scientific-technical journal

EQUIPMENT AND TECHNOLOGIES

FOR OIL AND GAS COMPLEX

                                                                                                           published since 2001

December 2017                                      ¹ 6                                         6 issues per year

 

CONTENÒS

 

GEOLOGICAL AND GEOPHYSICAL STUDIES AND DEVICES

 

Povzhik P.P., Degtyarev F.V. Laboratory testing of clays inhibitors and selecting of the optimal reagent for troubleproof drilling of supra-salt part of the Pripyat trough (p. 4‑8)

 

Ioffe M.D., Belonozhko A.I. Uncertainties when substantiating PVT-properties of reservoir fluids (p. 9‑14)

 

MACHINERY AND EQUIPMENT

 

Yakimov S.B., Ivanovskiy V.N. The problem of selecting the design of electric centrifugal pumps when producing the liquid containing abrasive particles (p. 15‑19)

 

Mitrofanov A.V., Voronin S.P. Methods of studying the life-time of failure-free operation of separators of gas and oil production units by accumulation of loading regimes in the equivalent model (p. 20‑28)

 

Khabibullin M.Yà. Improvement of cleaning pumps, used in oil production, from mechanical impurities (p. 29‑33)

 

Milshtein L.M. Choice of a depulsator to prevent "damping" of oil-gas separators, separating mixtures: gas-liquid and gas-liquid of mechanical impurities (p. 33‑37)

 

Urazakov K.R., Azizov A.M., Zhuravlev D.V., Mukhin I.A., Davletshin F.F. Investigation of pressure influence at a pump suction and a harmful space volume on the filling factor of a sucker-rod pump with a gas-separator (p. 37‑44)

 

Mitrofanov A.V., Menshin A.B., Lisovsky O.N. Substantiation of the experimental model and evaluation of the strength of the closures gates elements of natural gas filters-separators with design deviations (p. 44‑50)

 

NEW METHODS AND TECHNOLOGIES

 

Zakirov A.F., Agliullin M.M., Karimov R.A., Tabashnikov R.A., Musabirov M.Kh., Fazleev R.R. A wave-chemical treatment of the near-wellbore zone during well workover operations (p. 50‑53)

 

Zaporozhets E.P., Shostak N.A. A method for calculation of the equilibrium thermobaric conditions of hydrates formation or dissociation in multicomponent mixtures (p. 54‑57)

 

Myagkov K.A., Tannenberg N.V., Pestunov V.A., Gaffanov R.F., Serikov D.Yu. Hydrodynamic analysis of the efficiency of a pressure self-stabilizer work under conditions of hydraulic shock occurrence and distribution (p. 58‑64)

 

Sharipov T.I., Sharafiev R.G., Rizvanov R.G. Comparison of power characteristics of vibrators of various constructions manufactured from different materials (p. 64‑69)

 

Davydov A.Yu., Gabdrakhimov M.S., Khabibullin M.Ya., Suleimanov R.I., Zaripova L.M. Well-drilling on the aerated oil using domestic bottomhole telemetric systems (p. 69‑73)

 

Philippova O.E., Mityuk D.Yu., Shibaev A.V., Muravlev D.A. Properties of the liquid used for the hydraulic fracturing of a formation, based on a viscous-elastic surface-active substance (surfactant) and polysaccharide (p. 73‑79)

 

PIPELINE TRANSPORT

 

Islamov R.R., Fridlyand Ya.M., Aginey R.V. Retrospective analysis of failures causes at the main oil and gas pipelines, working in complicated engineering-geological conditions (p. 80‑87)

 

Akhmedov A.M. The device developed to improve the technological process of a trench opening in the linear section of main pipelines (LSMP) (p. 87‑91)

 

Information on the articles (p. 92‑102)

 

 

Information on the articles

 

UDC 622.276

 

LABORATORY TESTING OF CLAYS INHIBITORS AND SELECTING
OF THE OPTIMAL REAGENT FOR TROUBLEPROOF DRILLING
OF SUPRA-SALT PART OF THE PRIPYAT TROUGH (p. 4)

 

Petr Petrovich Povzhik,

Filipp Vyacheslavovich Degtyarev

 

Production association "Belorusneft"

15b, Knizhnaya str., Gomel, 246003, Republic of Belarus,

e-mail: f.degtyarev@beloil.by

 

Supra-salt complex of Pripyat trough is represented by highly colloidal clay deposits with interbeds of unstable sandstones and siltstones, evenly distributed throughout the section. Unlike the other rocks, weakly interacting with different water-based drilling muds, clay rocks when contacting with the drilling mud leachate can greatly swell. Swelling of highly colloidal clays has a negative impact on the stability of the well walls, causing landslides and caving. Many of the identified problems can be solved by applying the inhibiting drilling muds. In the Republic of Belarus, the practice of application of the inhibiting solutions has many years of experience. However, due to a number of reasons (quality of drilling muds preparation, environmental aspects, insufficient choice of reagents-inhibitors) development of inhibitory compounds and the search for effective reagents remain relevant. The article presents the results of comparative tests of a number of inhibitors belonging to different groups of chemicals, the results of the laboratory studies of clay-containing slurry samples taken during the drilling of the wells supra-salt parts in various oil fields of Pripyat trough are submitted as well.

 

Keywords: clay; swelling; complication; wellbore stability; reagents-inhibitors; drilling mud; indicator of moistening ability.

 

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UDC 622.276

 

UNCERTAINTIES WHEN SUBSTANTIATING PVT-PROPERTIES
OF RESERVOIR FLUIDS (p. 9)

 

Maxim Dmitrievich Ioffe,

Alexey Igorevich Belonozhko

 

Production association "Belorusneft"

15b, Knizhnaya str., Gomel, 246003, Republic of Belarus,

e-mail: M.Ioffe@beloil.by, A.Belonozhko@beloil.by

 

The paper describes some approaches to uncertainty reduction when substantiating the PVT-properties of reservoir oil by the example of the eastern part of Digboi hydrocarbons (HC) field, located in the south-eastern part of Upper Assam Basin (India) and Osennee oilfield in the central part of the West Siberian oil and gas-bearing basin (the Russian Federation). The task was to create a PVT-model in conditions of insufficient initial data, use of the field data for its verification and salvation of the modeling inverse task.

 

Keywords: PVT-model; hydrodynamic researches (HDR); deep sampling; distillation of separated oil; recombined sample.

 

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UDC 622.276.53.054.23:621.67-83

 

THE PROBLEM OF SELECTING THE DESIGN OF ELECTRIC CENTRIFUGAL PUMPS
WHEN PRODUCING THE LIQUID CONTAINING ABRASIVE PARTICLES (p. 15)

 

Sergey Borisovich Yakimov

 

PJSC "NK "Rosneft"

31A, Dubininskaya str., Moscow, 115054, Russian Federation,

e-mail: s_yakimov@rosneft.ru

 

Vladimir Nikolayevich Ivanovskiy

 

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

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

e-mail: ivanovskiyvn@yandex.ru

 

One of the main factors affecting the operational life-time of electric centrifugal pumps is abrasive particles presence in the produced liquid. One of the effective measures to increase the operating failure-free time of submersible pumps is the choice of their design, that provides their design service-free life-time in certain operating conditions. The article considers and analyzes the existing approaches to the choice of the construction and materials used for working assemblies manufacture by Russian and foreign manufacturers of equipment. It is shown that the existing methods of foreign companies differ from those ones used in Russia by the fact that besides the number of abrasive particles in the produced liquid, their qualitative composition, i. e., the grain size composition and the degree of the quartz grains roundness, are taken into account. The maximum permissible concentration of abrasive particles in the liquid for the ESP of one and the same design and with similar materials the impellers are manufactured of in the methods, applied for the Russian manufacturers choice exceeds this indicator, fixed in the methods, applied by foreign companies. At the same time, the accumulated experience of ESPs operation in sand-bearing boreholes indicates the incorrectness of the equipment design that was chosen according to the methods of the Russian manufacturers. However, the methods of foreign companies, in the opinion of the authors of the article, have certain drawbacks, the main one of them is the problem of the equipment correct selection when the produced liquid contains a large number of large abrasive particles that cause hydro-abrasive wear-out of guiding devices and impellers blades. Besides, unlike foreign ones, Russian manufacturers of ESPs widely use the type 1 materials, alternative to traditional non-resistance, ones, such as pseudo-powder alloys, stainless steel and polymers. The choice of the equipment with these materials is not envisaged by the methods of foreign companies. The identified shortcomings stress the necessity of a domestic method development providing the selection of the design and materials for manufacturing of ESPs operational assemblies to be used in sand-bearing boreholes.

 

Keywords: ESP operation in complicated conditions; choice of a ESP design; increase of a ESP operational life-time.

 

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UDC 621.822.722

 

METHODS OF STUDYING THE LIFE-TIME OF FAILURE-FREE OPERATION
OF SEPARATORS OF GAS AND OIL PRODUCTION UNITS BY ACCUMULATION
OF LOADING REGIMES IN THE EQUIVALENT MODEL (p. 20)

 

Alexander Valentinovich Mitrofanov,

Sergey Petrovich Voronin

 

JSC "Security Systems and Technologies. Techdiagnostics"

22, Yunykh Lenintsev str., Orenburg, 460047, Russian Federation,

e-mail: contact@tdiag.ru

 

The authors of the article substantiate and propose some approach to specification of the predicted period of separators safe operation before their replacement and estimate of their operational life-time by developing their reduced model with account of the accumulated deviations and defects and performing experiments of its accelerated testing at the expense of loading regimes accumulation in it modeling the separator mode for the predicted period before the replacement. Such reduced model with deviations and defects of the original separator was made and tested to control the acoustic emission and tensometry. The control was conducted by application of the magnetic anisotropic method. According to the results of testing, the changes of the model’s parameters of state and design and the mechanisms of the limiting of the separator’s maximum states, determining its life-time operational period, were not revealed.

 

Keywords: technological equipment; separator; equivalent model; deviations and defects; operational life-time; operational life-time; operational safety; industrial safety; loading mode; experiment.

 

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UDC 622.276.53

 

IMPROVEMENT OF CLEANING PUMPS, USED IN OIL PRODUCTION,
FROM MECHANICAL IMPURITIES (p. 29)

 

Marat Yakhievich Khabibullin

 

Ufa State Oil Technical University, a branch in the city of Oktyabrsky

54a, Devonskaya str., Oktyabrsky, 452607, Republic of Bashkortostan, Russian Federation,

e-mail: m-hab@mail.ru

 

Mechanical impurities ingress into the borehole pump during its reciprocating motion results in friction occurrence between the parts. The pump is subject to heavy wear out. The structural specific feature of the wire filters used doesn’t eliminate completely the negative effect of mechanical impurities on downhole pumping equipment. The problem of the reliability improvement is proposed to be solved by using a new sand filter design. The article describes in detail the filter design and the derivation of the expressions to determine the size of the mechanical impurities to be cleaned when operating deep well pumping equipment. To determine the diameter of the inlet pipes, the number and diameter of the perforated holes there are nomograms that are constructed with account of all technical and technological conditions. During the year of the pumps operation there was not a single failure. A sharp decrease of the suspended particles concentration due to the product filtration led to a decrease of the load on the deep well pumping equipment, exclusion of the plunger seizure and valves clogging. Consequently, the overhaul period decreased.

 

Keywords: plunger; sand filter; mechanical impurities; overhaul period.

 

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UDC 622.276.8.05:655.622

 

CHOICE OF A DEPULSATOR TO PREVENT
"DAMPING" OF OIL-GAS SEPARATORS, SEPARATING MIXTURES:
GAS-LIQUID AND GAS-LIQUID OF MECHANICAL IMPURITIES (p. 33)

 

Leonid Markovich Milshtein

 

e-mail: mleonmark@gmail.com

 

The article considers three types of pulsation bottles: gas pre-withdrawal device (GPWD), flows pulsation bottle-distributer (FPBD) and the Venturi self-supporting nozzle (VSSN). The analysis and calculation of the entire parametric series of oil and gas separators (OGS) and vertical three-phase separators (VTPS), separating mixtures of gas, liquid and mechanical impurities are carried out. GPWD and OGS, in general cases by maximum parameters and in private cases by project parameters, does not perform the prevention function of separators damping prevention. It is recommended to install a FPBD or VSSN or GPWD as a pulsation bottle before these separators, but the latter one should be installed only in case of the absence of the liquid intake excess above its outlet from the separator.

 

Keywords: pulsation bottle; gas pre-withdrawal device; flows pulsation bottle-distributer (FPBD); the Venturi self-supporting nozzle (VSSN); analysis; calculation; separator; parameter; excess; intake; outlet; liquid.

 

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UDC 622.276.5

 

INVESTIGATION OF PRESSURE INFLUENCE AT A PUMP SUCTION
AND A HARMFUL SPACE VOLUME ON THE FILLING FACTOR
OF A SUCKER-ROD PUMP WITH A GAS-SEPARATOR (p. 37)

 

Kamil Rakhmatullovich Urazakov,

Amir Murad Azizov

 

Ufa State Petroleum Technical University (USPTU)

1, Kosmonavtov str., Ufa, 450062, Russian Federation

 

Denis Vyacheslavovich Zhuravlev

 

LLC "Samara Research and Project Institute of Oil Production"

18, Vilonovskaya str., Samara, Samara region, 443010, Russian Federation,

e-mail: Zhurawlewa.a@yandex.ru

 

Ilya Andreevich Mukhin

 

LLC "PEGAZ" Scientific-Research Petroleum Institute

6, Verkhnetorgovaya Sq., Ufa, 450077, Russian Federation

 

Filyus Fanizovich Davletshin

 

Bashkir State University

32, Validy str., 450076, Ufa, Russian Federation,

E-mail: Felix8047@mail.ru

 

One of the most important factors determining the efficiency of a downhole sucker-rod pumping unit (DSRPU) is the sucker-rod pump’s filling factor. The greatest influence on the degree of the fluid filling into the pump cylinder is paid by the gas content in a well product as well as by the presence of the volume enclosed between the suction and discharge valves of the pump in the lowest position of the plunger that is called the harmful (dead) space of the downhole sucker-rod pump. The degree of the influence of the harmful space volume on the filling factor is primarily determined by the ratio of free and dissolved gas under the conditions of the pump intake, which mainly depends on the pump intake pressure, the separation coefficient, the product water-flooding, etc.

The article considers the processes occurring in the sub-plunger cavity of the pump with the gas separator when withdrawing gas-liquid mixture. It also quantitively evaluates the pressure influence at the pump intake and the harmful space volume on these processes nature. An of The well-known models describing the hydraulics of the downhole sucker-rod pump are analyzed, and a model that detailly takes into account the mixture compressibility in the sub-plunger cavity and the equilibrium processes of gas separation and dissolution in oil are proposed. With the help of the numerical simulation by ANSYS software complex, the transient processes occurring in the sub-plunger cavity of the pump at the suction stroke are studied in detail, and the influence of the pressure at the pump intake on the characteristics of these processes are evaluated.

 

Keywords: sucker-rod pump; filling factor; harmful space; intake pressure; equilibrium processes; gas-liquid mixture.

 

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UDC 621.822.722

 

SUBSTANTIATION OF THE EXPERIMENTAL MODEL AND
EVALUATION OF THE STRENGTH OF THE CLOSURES GATES ELEMENTS
OF NATURAL GAS FILTERS-SEPARATORS WITH DESIGN DEVIATIONS (p. 44)

 

Alexander Valentinovich Mitrofanov,

Anatoly Borisovich Menshin,

Oleg Nikolaevich Lisovsky

 

JSC "Security Systems and Technologies. Techdiagnostics"

22, Yunykh Lenintsev str., Orenburg, 460047, Russian Federation,

e-mail: contact@tdiag.ru

 

An experimental evaluation of the tightening assembly strength of quick-opening closures gates of filters-separators with deviations in the dimensions and position of the structural elements used for natural gas purification is presented in the article. The reduced model of the tightening unit and the compliance with the similarity conditions by the deformations reproducibility criterion as well as application of the resistive strain-gauging method to measure deformations are substantiated. A plan for the experiment preparation and conducting is prepared. The stepwise loading of the experimental model up to the design load and the strength test by the load that is 25 % higher than the design one is performed. The results of the experiment showed that the model can withstand the strength test without the appearance of residual deformations and cracks, the experimental data and deformation theoretical calculations differ by no more than 10 %.

 

Keywords: filter-separator; quick-acting (quick-opening, clamp ring) closures; diagnostics; stress-strain state; strength; experiment; resistive strain-gauge measurement.

 

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UDC 622.276.7+622.276.6

 

A WAVE-CHEMICAL TREATMENT OF THE NEAR-WELLBORE ZONE
DURING WELL WORKOVER OPERATIONS (p. 50)

 

Airat Fikusovich Zakirov,

Ruslan Azgarovich Karimov,

Roman Alexeevich Tabashnikov

 

LLC "Tagras-RemService"

43, R. Fakhretdin str., Almetyevsk, 423458, Republic of Tatarstan, Russian Federation,

e-mail: tnrs@tagras.ru

 

Mintalip Mingaleevich Agliullin

 

LLC "IKES-oil"

167-51, Komsomolskaya str., Ufa, 450098, Republic of Bashkortostan, Russian Federation,

e-mail: ikesoil@mail.ru

 

Munavir Khadeevich Musabirov

 

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

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

e-mail: musabirov@tatnipi.ru

 

Radik Rashitovich Fazleev

 

LLC "AlmetyevskRemService"

2, Proizvodstvennaya str., Almetyevsk, 423450, Republic of Tatarstan, Russian Federation,

e-mail: aupnp@tagras.ru

 

The paper discusses the mechanistic model of formations’ near-well zone damage (skin damage, colmatation), reviews its aspects and differences for production and injection wells as well as methods of the near-well zone treatment based on this concept. This concept relies on rock deformation under pressure in porous medium and change of pore cross-sectional area. Injection wells are characterized by additional entrapment of colmatants’ fine particles after the injection is stopped. These fines are not easily removed by pressure drawdown, thus requiring integrated solutions for near-wellbore treatment. As for production wells, the skin damage is generally caused by disturbing pressure and temperature conditions of formation fluids, and damage removal is provided by chemicals injection with subsequent removal of chemical reaction products.

The authors suggest a wave-chemical treatment of near-wellbore zones during wells workover operations using jet pumps with a multi-reverse circulating valve. This technology removes the entrapped fines by generating alternating filtering pressure waves at the bottom of a well. The main feature of such waves is high underbalance and overbalance pressure rise rates as well as control of pulses height and length. This technology, applied in more than 150 wells of the Tatarstan Republic, of which 77 % are injection wells, proved to be successful.

Considering the increasing demand for well stimulation innovative methods, this technology can be the most efficient in unconventional reservoirs, including tight reservoirs with heavy oil due to intensive caving in the near-wellbore region, and in water-producing wells fund due to integration with water shutoff works.

 

Keywords: well workover; skin damage (colmatation); near-wellbore treatment; wave-chemical treatment; unconventional reservoirs (hard-to-recover oil reserves); jet pump; pressure filtration waves.

 

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UDC 622.279.72

 

A METHOD FOR CALCULATION OF THE EQUILIBRIUM THERMOBARIC
CONDITIONS OF HYDRATES FORMATION OR DISSOCIATION
IN MULTICOMPONENT MIXTURES (p. 54)

 

Evgeny Petrovich Zaporozhets,

Nikita Andreevich Shostak

 

Kuban State technological university

2, Moskovskaya str., Krasnodar, Krasnodar region, 350072, Russian Federation,

e-mail: zep1945@inbox.ru, nikeith@mail.ru

 

When solving some technological and technical challenges of the oil and gas industry it is necessary to determine the equilibrium thermobaric conditions of hydrates formation and dissociation in multicomponent mixtures, which include natural and petroleum gases. When developing the method of calculation of equilibrium thermobaric conditions of hydrates dissociation, the hydrates-forming physical-mathematical models, experimental studies and practical applications in this field over the period from 1780 to the present day were analyzed. To determine the equilibrium pressure of hydrates formation or dissociation in multicomponent mixtures depending on their temperature and components composition, the calculation method, that is applicable for the systems, being in phase states: gas or gas–liquid multi–component mixture – water vapor–ice; gas or gas–liquid multi–component mixture of water vapor–liquid water is developed.

 

Keywords: hydrates formation; hydrates; hydrates dissociation; calculation method; multicomponent system; thermobaric conditions.

 

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UDC 532.595.2

 

HYDRODYNAMIC ANALYSIS OF THE EFFICIENCY
OF A PRESSURE SELF-STABILIZER WORK UNDER CONDITIONS
OF HYDRAULIC SHOCK OCCURRENCE AND DISTRIBUTION (p. 58)

 

Konstantin Antonovich Myagkov,

Nadezhda Viktorovna Tannenberg,

Vitaly Alfredovich Pestunov

 

LLC "TechPromArma"

18, bld. 1, Schipok str., Moscow, 115054, Russian Federation,

e-mail: myagkov_k@list.ru, nadya.krupysheva@gmail.com, pv@tehpromarma.ru

 

Rustem Flitovich Gaffanov

 

LLC "Engineering and Accounting Company" Project"

7, apartment 1, Smolenskaya str., Moscow, 119121, Russian Federation,

e-mail: marat-rust@yandex.ru

 

Dmitry Yurievich Serikov

 

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

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

e-mail: serrico@rambler

 

The article presents the results of modeling of a hydraulic shock impact on a pipeline system, assesses the stress-strain state of a pipeline section and suggests a technique for estimation of the medium dynamic influence on a pipeline strength. The hydraulic shock phenomenon and the causes of its occurrence are considered. The description of the hydraulic impact, its physical model, the possibility of determining the magnitude of the hydraulic shock and the speed of its propagation in the medium are given. Negative effects of a hydraulic shock impact on a pipeline system are described. A computational experiment of hydrodynamic calculations of a hydraulic shock occurrence and propagation is carried out, the principle of the operation based on the dissipative killing effects and the efficiency of the pressure self-stabilizing device to eliminate the hydraulic shock negative effects is proposed and presented. The results of the calculation proved more than 13 times decrease of dynamic load on the pipeline system with a pressure self-stabilizer installed on it. The results of the calculation do not contradict the known physical picture and are confirmed by practical tests.

 

Keywords: hydraulic shock; pipeline system; pipelines; pressure self-stabilizer; mathematical modeling.

 

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UDC 628.517.4

 

COMPARISON OF POWER CHARACTERISTICS
OF VIBRATORS OF VARIOUS CONSTRUCTIONS MANUFACTURED
FROM DIFFERENT MATERIALS (p. 64)

 

Timur Irekovich Sharipov,

Robert Garafievich Sharafiev,

Rif Garifovich Rizvanov

 

Ufa State Petroleum Technical University (UGNTU)

1, Kosmonavtov str., Ufa, 450062, Russian Federation,

e-mail: timyr.sharipov@gmail.com, sharafiev47@mail.ru, rifriz@mail.ru

 

The article deals with the problem of protection from vibration and shock loads. Vibration is the mechanical vibrations of machines and mechanisms. The fight against vibration is relevant in all areas of human activity. Vibration affects both the equipment and facilities and people.

It is shown that the shape, material and size of the vibration isolator play an important role in this matter, because the power characteristic of the support also changes

The results of load simulation have shown that the disk-shaped vibration isolator has a flat power characteristic, being its main advantage. The systems with a gently sloping section on the power characteristic are called the systems with quasi-zero rigidity. These systems allow to isolate a wide range of frequencies, as well as shock loads.

 

Keywords: vibration; dynamic effects; fluctuations of machines and mechanisms; power characteristic; shock loads.

 

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UDC 622.23.05

 

WELL-DRILLING ON THE AERATED OIL USING
DOMESTIC BOTTOMHOLE TELEMETRIC SYSTEMS (p. 69)

 

Alexander Yurievich Davydov,

Mavlitzyan Sagityanovich Gabdrakhimov,

Marat Yakhievich Khabibullin,

Rustem Iskhakovich Suleimanov,

Lilia Mavlitzyanovna Zaripova

 

Ufa State Oil Technical University, a branch in the city of Oktyabrsky

54a, Devonskaya str., Oktyabrsky, 452600, Republic of Bashkortostan, Russian Federation,

e-mail: alex-dy@yandex.ru, m-hab@mail.ru, rustamsul@rambler.ru, lilyabert31@mail.ru

 

The article considers the results of using the domestic bottom hole telemetric "ZTS-42EM-M" system (with an electromagnetic communication channel) and "ZTS-42KK" system (with a combined communication channel), manufactured by LLC NPF "VNIIGIS-ZTK" when drilling wells on a depression in the fields of Tatarstan, Perm region, Udmurtia and the Western Siberia. The applied assemblies of the drilling equipment and the structure of TV systems, their technical characteristics, design features, advantages and shortcomings are given. The difficulties that arose during the work and the techniques of their overcoming are described.

 

Keywords: bottom hole telemetric systems; electromagnetic communication channel; combined communication channel; drilling on a depression; oil aerated by nitrogen.

 

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UDC 622.276.6

 

PROPERTIES OF THE LIQUID USED FOR THE HYDRAULIC FRACTURING
OF A FORMATION, BASED ON A VISCOUS-ELASTIC SURFACE-ACTIVE SUBSTANCE
(SURFACTANT) AND POLYSACCHARIDE (p. 73)

 

Olga Evgenievna Philippova1,

Dmitry Yurievich Mityuk1, 2,

Andrey Vladimirovich Shibaev1,

Dmitry Alexandrovich Muravlev1

 

1 Lomonosov Moscow State University (MSU), Faculty of Physics

1, bld. 2, GSP-1, Leninskie Gory, Lomonosov MSU, Moscow, 119991, Russian Federation,

e-mail: khokhlov@polly.phys.msu.ru

 

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

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

e-mail: fch@gubkin.ru

 

The mixed model system formed by the micellar chains of the viscoelastic surfactant erucyl-bis (hydroxyethyl) methylammonium chloride and the polymer mesh of the ritizan exopolysaccharide is of undoubted practical interest. The rheological properties of such binary systems can be flexibly regulated by the introduction of the ions of Cr3+ polyvalent metal and others, since they cause cross-linking of polymer chains and viscosity growth. This regularity is most clearly manifested when analyzing the rheological data, primarily in the field of low values of the shear gradient rate, when in the presence of Cr3+ the system viscosity value increases by almost an order in comparison with the original system. The advantage of the liquid, being investigated, is its compatibility with the sample of the Russkoe oil field, that fact was revealed during the standard test. The received information is supplemented by the results of filtration tests, they indicate that there is no damage to the rock sample and a significant reduction in its permeability after the treatment. Thus, the work shows that the composition of a liquid based on a polysaccharide, a viscoelastic surfactant and a complexing agent Cr3+ is acceptable for use in the technology of a formation hydraulic fracturing and possesses valuable properties that can be regulated during its practical application.

 

Keywords: ritizan; viscoelastic surfactants; hydraulic fracturing of a formation; cross-linked polymer; double meshes; reservoir characteristics studies.

 

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UDC 622.692.4.053

 

RETROSPECTIVE ANALYSIS
OF FAILURES CAUSES AT THE MAIN OIL AND GAS PIPELINES, WORKING
IN COMPLICATED ENGINEERING-GEOLOGICAL CONDITIONS (p. 80)

 

Rustem Rilevich Islamov

 

JSC "Transneft-North"

2/1, A.I. Zeryunov prosp., Ukhta, 169313, Komi Republic, Russian Federation,

e-mail: post@uht.transneft.ru

 

Yakov Mikhailovich Fridlyand

 

LLC "Transneft Research Institute"

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

e-mail: fridlyandym@niitnn.transneft.ru

 

Ruslan Viktorovich Aginey

 

JSC "Giprogazcenter"

26, Alexeevskaya str., Nizhny Novgorod, 603950, Russian Federation,

e-mail: aginey@ggc.nnov.ru

 

This study urgency is caused by the problem of the impact of dangerous hydrogeological phenomena on the operational safety, reliability and efficiency of main oil and gas pipelines. The article presents the results of the analysis of the data on the destruction of oil and gas pipelines in Europe, the United States of America and the countries of the former USSR, examples of emergency failures of pipelines and the causes of their occurrence as well as the destruction aftereffects are considered. Based on the results obtained, the most dangerous factors that affect the reduction of the plastic properties of the pipe material are identified. The necessity of implementing measures to control longitudinal stresses in the walls of the main oil and gas pipelines is substantiated.

 

Keywords: oil and gas pipelines; accident; stress-strain state; complicated conditions.

 

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UDC 621.644:624.134.16

 

THE DEVICE DEVELOPED TO IMPROVE THE TECHNOLOGICAL PROCESS
OF A TRENCH OPENING IN THE LINEAR SECTION OF MAIN PIPELINES (LSMP)
(p. 87)

 

Asvar Mikdadovich Akhmedov

 

Volgograd State Technical University

1, Akademicheskaya str., Volgograd, 400074, Russian Federation,

e-mail: asvar05@mail.ru

 

The article proposes a device developed to improve the operational process of a main pipeline opening using a single-bucket excavator. The device can be used when building or repairing a linear pipeline section. The use of the proposed device in combination with a single-bucket excavator will reduce the time required for a trench opening due to two operations drop off from the excavator’s operation cycle. The 3-D simulation model is given to visualize the proposed device and its work together with the excavator. The device will strengthen the repair and construction process. The device structural design can make it possible to change the size of the frame in the longitudinal direction, thus providing its use while opening and capital repairing of the pipelines of different diameters. The proposed device use will cut harmful emissions into the air at the expense of the reduction of the time required for a trench opening. Assume that the single-bucket excavators are used everywhere when constructing facilities and implementing methods of workover, the introduction of the device will be of great benefit for the oil and gas industry of our country both economically and environmentally.

 

Keywords: main pipeline; trench opening process; process operation; operation cycle of an excavator; workover; construction of a main pipeline.

 

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JSC "ALL-RUSSIAN SCIENTIFIC-RESEARCH INSTITUTE OF ORGANIZATION, MANAGEMENT AND ECONOMICS OF OIL AND GAS INDUSTRY"

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