ISSN 1999-6934

Scientific-technical journal

EQUIPMENT AND TECHNOLOGIES

FOR OIL AND GAS COMPLEX

                                                                                                           published since 2001

August 2017                                             ¹ 4                                        6 issues per year

 

CONTENÒS

 

MACHINERY AND EQUIPMENT

 

Mukhametshin A.A., Nasyrov A.L., Mukhametshin T.A. Study of forces acting on whipstock and retrieval tool during pulling its out of a hole (p. 4-8)

 

Ischuk A.G., Nazarov A.M., Timchenko M.A., Serikov D.Yu. New design of the support of a rolling-cutter drill bit (p. 8-13)

 

Rahimova M.S. Determination of machines details strength of oilfield equipment (p. 13-15)

 

Minnivaleev A.N. Hydro-mechanical device to clean the inside surface of tubing (p. 16-20)

 

MATERIALS AND REAGENTS

 

Povzhik P.P., Dobrodeeva I.V., Degtyarev F.V. The study of physico-chemical properties of clay-containing samples with the aim of selecting reagents-inhibitors of clay hydration (p. 21-24)

 

Mamedtagizade M.A. Statistical analysis of the influence of the cement slurry composition and properties on the sedimentation stability (p. 25-28)

 

NEW METHODS AND TECHNOLOGIES

 

Nasybullin A.V., Salimov O.V., Sakhabutdinov R.Z., Salimov V.G. Effect of process fluid viscosity on hydraulic fractures geometry (p. 29-34)

 

Kershenbaum V.Ya., Kalazhokova Yu.A., Smirnov S.V. Assessment of scientific works quality in import substitution conditions (p. 35-38)

 

Mammadov V.T. Calculation of the heat exchange equipment to provide thermal effect on a formation (p. 38-40)

 

Urazakov K.R., Latypov B.M., Komkov A.G., Davletshin F.F. Calculation of the theoretical dynamometer card of a differential sucker-rod pump when producing high-viscous oil (p. 41-47)

 

Serikov D.Yu., Sharapov A.N. Study of the geometry influence of cone rollers’ teeth cutting structures on the hydraulic environment (p. 47-52)

 

PIPELINE TRANSPORT

 

Kazantsev M.N., Flegentov I.A., Zozulya S.N. Pipeline sealing devices, used in repair work (p. 53-57)

 

Akhmedov A.M. A mechanism for determining the position of the underground main pipeline and marking to fix it on the ground (p. 57-62)

 

●  ●  ●

 

"NEFTEGAZ-2017" International Exhibition (p. 63-65)

 

Information on the articles (p. 66-74)

 

 

Information on the articles

 

UDC 622.243.272

 

STUDY OF FORCES ACTING ON WHIPSTOCK AND RETRIEVAL TOOL
DURING PULLING ITS OUT OF A HOLE (p. 4)

 

Almaz Adgamovich Mukhametshin,

Azat Leonardovich Nasyrov

 

TatNIPIneft, PJSC "V.D. ShashinTatneft"

32, M. Jalil str., Bugulma, 423236, Republic of Tatarstan, Russian Federation,

e-mail: maa@tatnipi.ru, nal@tatnipi.ru

 

Timur Almazovich Mukhametshin

 

JSC "Kazan helicopters"

14, Tetsevskaya str., Kazan, 420101, Republic of Tatarstan, Russian Federation,

e-mail: mta1978@bk.ru

 

The article presents the results of studying the forces acting on a whipstock and a tool of its pulling out of a hole – retrieval device – as well as the calculation of the retrievable whipstick’s body strength near the center slot and the retrieval tool under the influence of axialtension loads in conditions of reversal loads during the whipstock-retrieval tool catching, breaking it away from the place of its installation and transfer into a transportation position applying a finite elements method.

The pulled-out whipstock and the retrieval tool are used when constructing complex-trajectory wells providing no loss of the main wellbore inside diameter after side-tracking operations.

The accuracy of strength calculations has been proved by bench tests. The new-design retrieval tool and whipstock successfully resisted maximum axial load without any failure.

 

Keywords: retrievable whipstock; retrieval tool; Mises stress; normal stress.

 

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UDC 622.24.051

 

NEW DESIGN OF THE SUPPORT OF A ROLLING-CUTTER DRILL BIT (p. 8)

 

Andrey Georgievich Ischuk,

Alexander Mikhailovich Nazarov,

Mikhail Anatolievich Timchenko

 

NRB – New Rock Bits

788, Bezrucova, Turnov, 51101, Czech Republic

 

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 article presents the results of work aimed at further improvement of the design of the support of a rolling-cutter drill bit. Based on the carried out scientific-research and design-technological work, a new design of sliding bearings was developed, which makes it possible to significantly improve the reliability and efficiency of the support assemblies of rolling-cutter drill bits.

The essence of the development lies in equipping of a drill bit’s bearing assembly by floating bushings, the inner and outer surfaces of which contain screwed lubricating grooves of a certain geometry, as well as by the pitch and direction of the helical line lifting.

The use of new-design floating bushings allows maintaining high-quality forced circulation of a lubricant inside the bearing assembly during the whole operation time of the rolling-cutter drill bit.

Equipping the rolling-cutter drill bits with new-design sliding bearings will not only increase the reliability and durability of bits support assemblies, but also increase the efficiency of the drilling tool in the whole.

 

Keywords: rolling-cutter drill bit; support unit; sliding bearing.

 

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UDC 622.692.4:621.646

 

DETERMINATION OF MACHINES DETAILS STRENGTH
OF OILFIELD EQUIPMENT (p. 13)

 

Mahluga Surkhayevna Rahimova

 

Azerbaijan State University of Oil and Industry

34, Azadlyg prosp., Baku, ÀZ1010, Azerbaijan Republic,

e-mail: Rahimova_mahluqa@mail.ru

 

The article considers the definition of the wear-out limit by subjecting oilfield equipment and high-voltage machine parts to the effect of high stresses. When testing the static flexibility, the limits of percolation, strength period, strength relative to flexibility, the coefficient of plastic deformation are established. Most of the equipment parts have such sections, the greatest stresses in which are higher than in other sections.

The safety factor takes into account the degree of accuracy of determining the actual loads, possible deviation of the mechanical characteristics of the equipment parts’ material strength from the values adopted in the course of calculation, the presence of internal undetected defects in the material.

 

Keywords: strength; plastic material; details; coefficient of plastic deformation; element.

 

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UDC 622.276.53

 

HYDRO-MECHANICAL DEVICE TO CLEAN
THE INSIDE SURFACE OF TUBING (p. 16)

 

Artur Nailievich Minnivaleev

 

Ufa State Petroleum Technological University, a branch in the city of Oktyabrsk

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

e-mail: of.ugntu@mail.ru

 

A generous amount of tubing is used in oil industry. Before conducting the whole complex of repair works, cleaning of tubing internal surface from any kind of sediments, accumulated on it, is required. The problem of prevention of tubing’s asphaltene-resin-paraffin sediments remains one of most urgent for the industry. The article enumerates the methods and tools used to remove asphaltene-resin-paraffin sediments from the inside surface of tubing, proposes the use of the hydromechanical device which is supplied with a rotor mechanism, having cuttings and calibrating structures, presents the description and the operational principal of the device developed for pipes cleaning, submits the formulas of the rotation moment of the rotor part of the device, describes the drive which the device is additionally supplied with, followed by the description of its work, as well as the description and work of the laboratory bench used for the drive operation testing, the graphs of root-mean-square (RMS) value of the device vibro-speed are shown under the liquid different consumption and the spring rigidity, field tests of the hydro-mechanical device for the removal of asphaltene-resin-paraffin sediments (ARPS) from the tubing are described.

 

Keywords: asphaltene-resin-paraffin sediments; tubing; hydromechanical device; rotary mechanism; pulsating washing; hydraulic surge.

 

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UDC 622.276.244

 

THE STUDY OF PHYSICO-CHEMICAL PROPERTIES OF CLAY-CONTAINING SAMPLES
WITH THE AIM OF SELECTING REAGENTS-INHIBITORS OF CLAY HYDRATION (p. 21)

 

Petr Petrovich Povzhik,

Inna Vladimirovna Dobrodeeva,

Filipp Vyacheslavovich Degtyarev

 

Production association "Belorusneft"

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

e-mail: f.degtyarev@beloil.by

 

Drilling the supra-salt sediments in the territory of the Republic Belarus is accompanied by complications caused by swelling of the highly colloidal clays – sticking, dragging, packing. To prevent such complications, it is advisable to use the inhibiting drilling muds which suspend the clay minerals hydration. To create an effective inhibiting drilling mud for a definite field, it is necessary to comprehensively study the clay-containing rocks, selected from this field, and based on the obtained results to select the reagents that provide the inhibitory properties of the drilling mud.

This article presents the results of laboratory studies of clay-containing slurry samples selected when drilling supra-salt parts of wells in the various oil fields of Pripyat trough. The ñolloidality coefficients of the selected samples are determined and tablet samples, made from clay-containing rocks, are tested in water solutions of salts-inhibitors and water solutions of polymers.

 

Keywords: clay; swelling; complication; wellbore stability; inhibition; drilling mud; coefficient of colloidality.

 

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UDC 622.245.422.4

 

STATISTICAL ANALYSIS OF THE INFLUENCE
OF THE CEMENT SLURRYCOMPOSITION AND PROPERTIES
ON THE SEDIMENTATION STABILITY (p. 25)

 

Murad Alinazim Mamedtagizade

 

Azerbaijan State Oil and Industry University (ASOIU)

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

e-mail: murad.mamedtagizade@yahoo.com

 

The article considers the problems of ensuring the reliable cementing of wells. The main technique to enhance wells cementing quality is to improve the structural-mechanical and rheological properties of the cement slurry and cement stone. The increased requirements to the quality of cementing lead to additives range expansion of cement slurries and development of new highly effective compositions. Various additives introduction allows, to a certain extent, adjusting the basic characteristics of the cement slurry, herewith, in some cases it is quite possible that improvement of some properties can bring worsening of the other ones. To determine the effect of various additives on the basic properties of cement slurries, it is necessary to carry out experimental and field researches. During researches the dependences of sedimentation stability on the water-cement ratio, static shear stress and the mixing fluid viscosity were subjected to statistical processing. Based on the data analysis and results interpretation, the influence of the mixing fluid viscosity and water content on the density and static shear stress of plugging solutions was determined under such intensity of sedimentation water separation, when there is no suffusion damage of cement slurries structure.

 

Keywords: cement slurry; structural-mechanical properties; rheological properties; sedimentation stability; statistical analysis.

 

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UDC 622.276.66

 

EFFECT OF PROCESS FLUID VISCOSITY
ON HYDRAULIC FRACTURES GEOMETRY (p. 29)

 

Arslan Valerievich Nasybullin,

Oleg Vyacheslavovich Salimov,

Rifkhat Zinnurovich Sakhabutdinov

 

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

32, Musa Jalil str., Bugulma, 423236, Republic of Tatarstan, Russian Federation,

e-mail: arslan@tatnipi.ru, sov@tatnipi.ru, rifkat@tatnipi.ru

 

Vyacheslav Gainanovich Salimov

 

Russian Academy of Natural Sciences, Volgo-Kamsk regional branch

21, Voroshilov str., Bugulma, 423236, Republic of Tatarstan, Russian Federation,

e-mail: salimov@tatnipi.ru

 

The paper presents the results of fracture geometry calculations for different-viscous fracturing fluids when their other parameters are similar.

It is revealed that there are two viscosity ranges when a fracture fixed length does not depend on the fluid consumption. The first viscosity range is approximately from 5 to 10 mPa·s and the second one – from 90 to 100 mPa·s. Besides, in these ranges, the ratio of the fracture fixed length ratio is also unaffected by the fluid consumption. Viscosity range between 20 and 200 mPa·s yields maximum fracture fixed length, herewith, the fluid exhibits good proppant suspension capacity. Thus, these fluid viscosities are the most favorable ones in the geological conditions typical of oil fields in the Republic of Tatarstan. Peak value goes up with the increase of the injection rate. XLIN201, XLIN13, and ELIN13 linear gels can be appropriate fracturing fluids for Tatarstan oil fields, in case some formulation adjustments are made to ensure adequate viscosity stability with time. Optimal fracture geometry in a given fluid viscosity range (e.g., when fracturing fluid choice is limited) requires changes in the injection schedule. Variations in the mixture injection rate enable the desired fracture geometry for a particular fracturing fluid.

When fluid viscosity exceeds 100 mPa·s, dimensionless fracture conductivity becomes almost unaffected by the injection rate. With low-viscosity fluids, injection rate has a substantial impact on the dimensionless fracture conductivity. In this case, the proppant placement pattern should be taken into account. In cross linked gels, the proppant settling is negligible, with the bulk of the proppant accumulating in the perforated interval. In a low-viscosity fluid, the proppant settles down at the bottom of the fracture creating a bank in the bottom part of induced fracture. The upper portion of the productive formation is virtually unpropped.

Very viscous fluids result in higher fractures and negligible proppant settling. This can be a preferred treatment plan if it is desired to establish communication between the well and additional pay interval through fracture height increase. It should be noted that fracture height growth depends primarily on in-situ stresses and rock properties while fracturing fluid viscosity is less important.

With ultra-low viscosity fluids, the fracture height tends to increase while proppant transport distance is short. Treatments with low-viscosity fluids should be preferable if coverage of any additional pay interval is unwanted and if short well-packed fractures are required. Very low viscosity will facilitate uniform proppant settling thereby resulting in maximum propped fracture width and minimum propped fracture length.

Favorable fluid/proppant combination involves an average-viscosity fluid and high-density proppant. Such a combination ensures moderate fracture height growth and some proppant settling with the resultant increase of propped fracture width. For this purpose, ceramic proppant with specific gravity of 3,6 g/cm3 can be used.

To select a fracturing fluid, it is recommended to plot a graph of dimensionless fracture conductivity versus the viscosity of the injected fluid. The fluid should be selected in such a way that its viscosity corresponds to dimensionless conductivity value of 1,6 (or close to it). For this purpose, some range of fracturing fluids should be available including at least three or four fluids with various gelling agent concentrations. Then fracture design should be created with the selected fracturing fluid.

Creation of a wide propped fracture implies application of ultra-low viscosity fluids to achieve a uniform proppant layer across the fracture with the resultant increase of the propped fracture width, which other methods fail to provide. However, such processes are associated with higher screen-out risks compared to treatments with fluids with better proppant retention capacities, and so are not widely used.

 

Keywords: fracturing fluid viscosity; proppant settling; uniform layer; fracture conductivity.

 

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UDC 622.276.553+382.5

 

ASSESSMENT OF SCIENTIFIC WORKS QUALITY
IN IMPORT SUBSTITUTION CONDITIONS (p. 35)

 

Vsevolod Yakovlevich Kershenbaum

 

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: tkaning@yadex.ru

 

Yuliya Anatolievna Kalazhokova

 

PJSC "Gazprom neft"

3, Pochtamtskaya str., St. Petersburg, 190000, Russian Federation,

e-mail: Kalazhîkova.YuA@gazprom-neft.ru

 

Sergey Vladimirovich Smirnov

 

LLC "Gazpromneft NTC"

75–79, Naberezhnaya of Moika str., St. Petersb urg, 190000, Russian Federation

 

The results of a comprehensive assessment of the quality of a scientific-technical organization activity, which is a calculation of an enterprise technological success, using a questionnaire and determining the innovativeness of the proposed solution, are considered.

 

Keywords: integrated quality assessment; technological success of enterprises; import substitution; customer satisfaction; median of Kemeni.

 

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UDC 622.276.65.05

 

CALCULATION OF THE HEAT EXCHANGE EQUIPMENT
TO PROVIDE THERMAL EFFECT ON A FORMATION (p. 38)

 

Vasif Talib Mammadov

 

Azerbaijan State Oil and Industry University

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

e-mail: mehriban1967@inbox.ru

 

Calculation of the heat exchange equipment that provides thermal effect on a formation is made based on the equation of thermal conductivity. Heat exchange process is considered for two cases: for the flat and cylindrical walls. On the basis of the calculation similar parameters both for the flat and cylindrical walls of the exchange equipment are obtained.

 

Keywords: oil formation; heat flow; heat transfer; thermal conductivity; thermal resistance.

 

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UDC 622.276.53

 

CALCULATION OF THE THEORETICAL DYNAMOMETER CARD
OF A DIFFERENTIAL SUCKER-ROD PUMP WHEN PRODUCING HIGH-VISCOUS OIL
(p. 41)

 

Kamil Rakhmatullovich Urazakov,

Bulat Maratovich Latypov,

Andrey Gennadievich Komkov

 

Ufa State Petroleum Technological University (USPTU)

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

e-mail: bulatti@hotmail.com

 

Filyus Fanizovich Davletshin

 

Bashkir State University

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

e-mail: felix8047@mail.ru

 

The article considers the design and operational principle of the developed differential sucker-rod pump for extracting high-viscous oil from low-debit wells. A mathematical model of the joint motion of sucker-rods and plungers in the cylinders of a differential downhole sucker rod pump when producing high-viscous oil from a low-debit directional oil well is presented. The proposed model provides prediction of the dynamic loads effect on the polished rod when extracting high-viscous oil from a well by means of a differential downhole sucker-rod pump. Calculations are made for the conditions of a definite well. The calculated dynamometer cards of a differential downhole sucker-rod pump are compared with the dynamometer cards of a standard downhole sucker-rod pump. The conducted calculations are used to explain the effectiveness of the use of differential downhole sucker-rod pumps when producing high-viscous oil as compared with the standard downhole sucker-rod pumps. The influence of the product viscosity, produced from a low-debit well on the efficiency of the differential and standard downhole sucker-rod pumps as well as possible complications of their operation, is shown.

 

Keywords: oil production; sucker-rod pump; pumping rods; differential sucker-rod pump; low-debit wells; high-viscous oil; mathematical model; dynamometer card.

 

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UDC 622.276.24

 

STUDY OF THE GEOMETRY INFLUENCE
OF CONE ROLLERS’ TEETH CUTTING STRUCTURES
ON THE HYDRAULIC ENVIRONMENT (p. 47)

 

Dmitry Yurievich Serikov,

Alexander Nikolaevich Sharapov

 

Gubkin Russian State University of Oil and Gas (NRU)

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

e-mail: serrico@rambler.ru

 

The article presents the results of laboratory and theoretical studies to determine the effect of toothed cutting structures of cone rollers on the hydraulic environment. Based on the laboratory studies, it is found out that helical cutting structures significantly affects the hydraulic environment. Herewith, the impact value directly depends on the rotational speed of the tool equipped with helical cutting structures – the more is speed, the greater is the impact.

The laboratory studies were added by a mathematical simulation of rotation of the cone roller’s peripheral tee throw in a hydraulic environment. The simulation resulted in identifying the main geometric parameters of the teeth, which have a significant effect on the hydraulic environment. The dependences of the influence of these or other geometric parameters of cutting structures on the degree of acceleration of the washing liquid flow are determined.

The conducted researches proved the fact that equipping of the cone rollers with helical cutting structures can significantly improve the efficiency of its operation due to the better operational characteristics of this type of cutting structures in conditions of near zero and low flow rates of the washing liquid, which prevents the possibility of packings and slurries.

 

Keywords: roller-cone drill bit; helical cutting structures; asymmetric tooth; hydraulic environment of a well bottom.

 

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UDC 62-83:621.6-7

 

PIPELINE SEALING DEVICES, USED IN REPAIR WORK (p. 53)

 

Maxim Nikolaevich Kazantsev,

Ilya Alexandrovich Flegentov,

Stanislav Nikolaevich Zozulya

 

LLC "NII Transneft"

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

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

 

The article describes various designs of sealing devices used when repairing pipelines and the principles of their operation. The main types of sealers and the technology of their use, starting from the most primitive frameless constructions that provide sealing due to the compressed air delivery into the sealer’s cavity and expansion till the direct contact with the pipe wall, till the highly technological remotely-controlled autonomous devices that move freely along the pipeline till the repair place. The advantages and disadvantages of various sealing technologies of a pipeline portion, subjected to repair, and their main technical characteristics are discussed. Each sealing method is estimated in view of their technology and application; the main fields of carrying out repair works, where application of any of the constructions, discussed above, is expedient, are considered. The results of the market analysis of the domestic manufactures of sealing devices, used when repairing the main and technological pipelines, are presented.

 

Keywords: sealing; repair; pipeline; sealings.

 

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UDC 621.643.053(24)

 

A MECHANISM FOR DETERMINING THE POSITION
OF THE UNDERGROUND MAIN PIPELINE AND MARKING TO FIX IT
ON THE GROUND (p. 57)

 

Asvar Migdadovich Akhmedov

 

Volgograd State Technical University

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

e-mail: asvar05@mail.ru

 

The article considers a technical solution to simplify the technological process of opening the main pipeline. This fact stimulated the development of a special device which is mounted on a base machine. The design of the proposed device allows only one person who is at wheel of the base machine simultaneously, in the real-time mode, to operate the machine, to search for the main pipeline and to apply marking lines to the trench boundaries. To accurately drive the base machine when marking, a laser emitter, projecting a straight laser line to the surface of the Earth, is mounted on the device. After marking, the driver directs the base machine strictly along the marked line of the pipeline axis, matching the projection superimposition directly to the laser beam with the marking lines of the pipeline axis on the Earth’s surface. Control over the overlapping of the projection of the laser straight line onto the marking line is carried out by means of the video surveillance camera installed on the mechanism, from which the image goes to the display and the driver can orient and correctly guide the machine in the desired direction. The use of this mechanism when implementing capital repair methods will increase the composition of the repair and construction stream (RCS).

 

Keywords: main pipeline; overhaul; pipeline opening; marking of the ground surface.

 

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"NEFTEGAZ-2017" INTERNATIONAL EXHIBITION
(p. 63)

 

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

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