Equipment and Technologies for Oil and Gas Complex

The article highlights some possible ways of solving the problem of critical parts import substitution of a subsea production system. Domestic and foreign firms are analyzed. The main ways of solving the problems mentioned are proposed.

Keywords: subsea production system (SPS); import substitution; the most important subsystems; Russian specificity.

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UDC 622.276.53.054.23:621.67-83

PISTON COMPENSATOR FOR THE INSTALLATION
OF THE ELECTRIC SUBMERSIBLE CENTRIFUGAL PUMP
WITH QUASI-ZERO STIFFNESS (p. 8)

Elena Borisovna Dumler

Almetyevsk State Oil Institute

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

e-mail: dumler08@mail.ru

Alexey Nikolaevich Zоtоv,

Kamil Rakhmatullovich Urazakov

Ufa State Oil Technical University

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

e-mail: info@rusoil.net

Evgeny Ivanovich Ignatov,

Oleg Yurievich Dumler

LLC "New Technologies"

168, Karl Marx str., 422980, Chistopol, Republic of Tatarstan, Russian Federation,

e-mail: mail@ntehn.ru

To compensate pressure drops at a ESP outlet it is proposed to use pneumatic compensators (dampeners). The article shows that the frequency of ESP pressure drops is low, therefore, to provide the vibration effective insulation of a pneumatic compensator piston its own frequency of oscillation should be small. It is impossible when using the existing pneumatic compensators. Effective vibration insulation of the pneumatic compensator’s piston is possible in case of the force characteristic of the pneumatic compensator that has the working part with quasi-zero stiffness. To get the quasi-zero stiffness a set of systems with positive and negative stiffness is necessary. A pneumatic compensator with a quasi-zero stiffness is supposed to be constructed as a set of a pneumatic spring and a package of consistently-connected disc-shaped springs, which is located inside the pneumatic spring and supports its piston. The pneumatic spring is a system with a positive stiffness, a package of consistently-connected dish-shaped springs – a system with negative stiffness. Parameters of dish-shaped springs are selected in such a way that is the force characteristic of all the package of springs should have a part of negative stiffness. Addition of negative stiffness of a package of dish-shaped springs and positive stiffness of a pneumatic spring makes the resultant system gain the quasi-zero stiffness. Calculations of the displacement of the pneumatic compensator piston at a sudden pressure drop on ESP outlet in case of a quasi-zero stiffness and elastic support of the piston, that is characteristic of the existing modern pneumatic compensators are presented in the article. In case pf the elastic support of the piston its displacement is tens of times less than in case of quasi-zero stiffness. In case of quasi-zero stiffness of the pneumatic compensator, displacement of its piston happens practically at any pressure drop that leads to the operation of the overall ESP unit.

Keywords: pneumatic compensator; pneumatic spring; ESP; quasi-zero stiffness; negative stiffness; dish-shaped springs.

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UDC 622.276

IMPROVEMENT OF SEALING SYSTEMS’ SUPPORTS
OF ROLLING-CUTTER DRILL BITS (p. 15)

Dmitry Yurievich Serikov,

Nikolay Mitrofanovich Panin

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

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

e-mail: serrico@rambler.ru

The article presents the results of work aimed at improving of the sealing systems of rolling-cutter drill bits’ bearing assemblies. Based on the analysis of the sealing systems structures as well as the main causes leading to a breach of the sealing of the of the rolling-cutter drill bits’ bearing assemblies during its operation, several options of sealing systems were developed.

The proposed sealing systems constructions allow, on the one hand, to increase the operational reliability of the bearings sealing systems, on the other hand – to simplify their constructions as compared with the existing serial analogues thus reducing the manufacturing cost of a rolling-cutter drill bits.

Keywords: rolling-cutter drill bit; bearing assembly; sealing element.

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UDC 622.276

INFLUENCE OF THE MECHANICAL-THERMAL FORMATION TECHNOLOGY (MTF)
ON THE PROPERTIES OF A DRILL-BIT COMBINED TEETH (CT) (p. 20)

Wilfried Armand Desiret Kombo

Marien Nguabi University

Republic of the Congo, Brazzaville, POB 69,

e-mail: willykombo@gmail.com

The article considers the possibility of sintering of hard alloys’ various carbide-tungsten-cobalt powders on steels with different carbon content. It is found that the strong characteristics, namely, in case of cutting, depend on the mechanical formation staging and, specifically, when the one-stage MTF is 1,6…1,9 times higher than the two-stage ones due to the η-phase elimination in the transition solid alloy-steel zone.

As a result, it is claimed that the durability of the combined teeth, obtained by the powders sintering method of tungsten-cobalt hard alloys depends on the mechanical formation staging.

Keywords: mechanical-thermal formation; W-Co powders; carbon; steel; combined tooth.

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UDC 622.276.245

WELL TOOLS FOR AFTEREFFECTS ELIMINATION
OF AN OPERATIONAL DRILL-PIPE STRING CRUSHING (p. 24)

Asif Ibrahim ogly Zeynalov

Research Institute "Geo-Technological Problems of Oil, Gas and Chemistry"

227, D. Alieva str., AZ1010, Baku, Republic of Azerbaijan,

e-mail: zeynalovasif@yahoo.com

The article describes the design specific features, the operational principle of the developed and implemented downhole tools, namely, the hydromechanical mandrel to straighten a production drill-pipe string crushed by external pressure and to restore its flow section, as well as a borehole pipe cutter for cutting off the pipe sections of the production drill-pipe string, which eliminates the breakage of the execution cutters during the technological operation implementation. Applications for patents of the Azerbaijan Republic on both developments are made.

Keywords: column; drill-pipe string; flow section; segment crushing; segment restoration; downhole tools.

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UDC 622.276

TECHNICAL REQUIREMENTS OF PJSC "NK" ROSNEFT"
TO SAND SEPARATORS USED TO PROTECT SUBMERSIBLE PUMPS (p. 32)

Sergey Borisovich Yakimov

PJSC "NK "Rosneft"

26/1, Sophiyskaya naberezhnaya, 117997, Moscow, Russian Federation,

e-mail: S_yakimov@rosneft.ru

The first tests of foreign manufacture submersible sand separators for the protection of electric submersible pumps, conducted in the fields of PJSC "NC "Rosneft" in 2005 showed high efficiency and ease of use. To create conditions for import substitution it was necessary to develop technical requirements for the functional properties of this equipment, which were completely absent in Russia. The technical requirements were developed based on the bench tests of sand separators produced by different manufacture and conducted on the instructions of PJSC "NK "Rosneft" at the Chair of Machinery and Equipment of Oil and Gas Industry of Gubkin Russian State University of Oil and Gas, the study of the world and generalization of their own experience, obtained during the equipment use as well as using the information on the use of hydro-cyclones to separate solid particles from fine and coarse suspensions in various industries. Criteria for separation of poly-disperse medium particles by their size were worked out, taking into account the specific features of submersible separators use and the specificity of abrasive wear out processes in submersible pumps. Another criterion was the efficiency of particle separation at the liquid various flow-rates of 1 and 25 cP viscosity as well as the presence of free gas in it. Development and introduction of these technical requirements in PJSC "NK "Rosneft" allowed to quickly form the market of domestic manufacturers of submersible sand separators at the expense of cost reduction in comparison with the import analogues to increase the volumes of their use and make the application of this equipment a standard practice for the protection of some of the wells with the most significant complications.

Keywords: mechanized oil production; protection of pumps from sand; submersible sand separators; combating complications when producing oil; increase of wells between-repair period of operation when using ESP and SRP.

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UDC 622.276

TECHNICAL AND TECHNOLOGICAL SOLUTIONS
TO IMPROVE THE QUALITY OF WELL COMPLETION
IN OFFSHORE FIELDS JV "VIETSOVPETRO" (p. 41)

Pham Van Hieu,

Hoang Quoc Khanh,

Ta Ngoc An,

Ta Van Thinh

JV "Vietsovpetro"

e-mail: hieupv.dr@vietsov.com.vn, khanhhq.rd@vietsov.com.vn, anhtn.rd@vietsov.com.vn, thinhtv.rd@vietsov.com.vn

Alexander Sergeevich Oganov

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

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

e-mail: abprus@mail.ru

This article focuses on the implementation of modern technical and technological developments to improve the quality of well completion. It includes the following: testing of "VersaFlex" liner hanger with swelling packers to improve the quality of cementing and to prevent the leaking in the annular space as well as the system of horizontal wells completion by using modern equipment of "Packers Plus" company.

Keywords: well construction and profile; "VersaFlex" liner hanger; swelling packer; horizontal well; well completion; logging while drilling; hydro-mechanical packer.

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UDC 622.276.1/.4(470.41)

PLANNING OF DOMANIC DEPOSITS DEVELOPMENT
OF BALLAEVSKY UPLIFT OF NOVO-ELKHOVSKOE OILFIELD (p. 49)

Marat Anisovich Shavaliev,

Ilgizar Nurgizarovich Khakimzyanov,

Elena Vladimirovna Gryzunova,

Danil Sergeyevich Danilov,

Guzaliya Ismagilovna Gafarova

TatNIPIneft, PJSC "V.D. Shashin Tatneft"

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

e-mail: shavaliev@tatnipi.ru, khakimzyanov@tatnipi.ru, gev@tatnipi.ru, razrdds@tatnipi.ru

The paper considers the problems related to planning of the Domanic deposits development of Ballaevsky uplift of Novo-Elkhovskoe field.

To increase efficiency of the Domanic oil deposits development, in Ballaevsky uplift of Novo-Elkhovskoe field, drilling of five infill wells by a triangular well pattern is suggested. Proppant and acid hydraulic fracturing of a formation is recommended to increase a formation permeability by creation of additional fracture systems. In the framework of the pilot development, a horizontal well will be drilled, thus providing approbation of the technology of a multistage hydraulic fracturing of a formation. To minimize the risks of drilling wells with noncommercial reserves, it is suggested to maximally use the well return fund and application of the technology of dual production.

According to the production forecast data based on the hydrodynamic model of Roxar (Tempest) software package, the offered development scenario will provide reaching 0,200 unit fraction of oil recovery factor in the Domanic deposits. The discounted net profit of the project during the design period will total to 221 million rubles, the state’s discounted profit will make 241 million rubles.

Keywords: the Domanic deposits; horizontal well; recovery of residual oil reserves; hydrodynamic model; oil recovery factor; economic assessment.

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UDC 622.279:681.5

DEVELOPMENT OF A METHOD FOR QUANTITATIVE ASSESSMENT
OF THE QUALITY OF WELLS WORKOVER AND GEOLOGICAL-TECHNICAL
MEASURES (p. 52)

Kurban Sapizhullaevich Ahmedov,

Vladimir Alexandrovich Tolpaev

LLC "Gazprom proektirovanie", a branch in the city of Stavropol

419, Lenin prosp., 355035, Stavropol, Russian Federation,

e-mail: AhmedovKS@scnipigaz.ru, TolpaevVA@scnipigaz.ru

The consequences of wells poor-quality workover and geological and geological-technical measures are numerous and diverse. Their elimination requires money that is comparable with the costs of new wells construction. At the same time, the poor quality of wells workover and of geological-technical measures in some cases threatens the implementation of the hydrocarbons production plan. The article proposes a method of quantitative assessment of wells workover and geological-technical measures quality as well as presents some definite examples of geological-technical measures assessment aimed at intensification of gas inflow to a well.

Keywords: well workover; geological-technical measures; data base; output of a well; production drill-pipe string; perforation channels; colmatation; bottom hole zone; well screen.

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UDC 622.276

DETERMINATION OF A BOUNDARY VALUE OF DYNAMIC SIMILARITY
CRITERION – THE CAUCHY PARAMETER SUCKER-ROD PUMPS (p. 60)

Igor Evgenievich Ishemguzhin,

Bulat Maratovich Latypov,

Vladimir Vasilievich Repin

Ufa State Petroleum Technical University

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

e-mail: ishemguzhin@yandex.ru, bulatti@hotmail.com, vladim_r@mail.ru

To calculate the dynamic stability of a rod string, the similarity criterion of sucker-rod pumps operating modes, the Cauchy parameter is used. The boundary value between the static and dynamic modes lies in the range of 0,3…0,5. For specific conditions, it is proposed to determine the exact value using the methods of reliability theory. To do this, the concordance criteria are calculated, allowing in doubtful cases to determine the law of the random value distribution, in this case – the work of the sucker-rod pump till its failure. The normal distribution law will correspond to the static regime, asymmetric laws will be dynamic. It is proposed to use the Pearson, Kolmogorov tests criteria for getting of a large number of statistical data, the Shapiro-Wilk, Bartlett, Mann tests – for a small number of statistical data.

Due to a well’s complex profile, the longitudinal oscillations of the rods can become transverse. That’s why, the obtained value is additionally checked for stability to parametric excitation according to the Ains – Strett diagram. In the intersection of the areas of sucker-rod pumps possible operational modes and the Cauchy parameter values of 0,3…0,5, either static or dynamic operational mode of the pumping unit is specified by the zones of stability of the Ains – Strett diagram.

Keywords: rod string; parametric vibrations; resonance; dynamic stability; pumping unit; tubing; friction forces; oscillations frequency; free frequency; forced oscillations.

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UDC 622.276+621.643

SUBSTANTIATION OF AN APPROACH, PARAMETERS AND SELECTION CRITERIA
OF ELEMENTS OF GAS-CHEMICAL COMPLEX EQUIPMENT FOR METAL CHOICE
AND ITS TESTING ON THE CRACK RESISTANCE DURING DIAGNOSING (p. 64)

Alexander Valentinovich Mitrofanov,

Anatoliy Borisovich Menshin

JSC "Techdiagnostika"

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

e-mail: contact@tdiag.ru

The article discusses the necessity of selecting elements and places for cutting of metal samples of gas-chemical complex equipment for testing during diagnostics.

The substantiation of the approach, parameters and criteria for the selection of equipment elements the metal with a spread of the mechanical properties values that affect the "conditional stock" of metal properties that provides resistance to brittle fracture (RBF), selection and testing of samples for crack resistance is considered.

It is shown that the values of the steel ductility parameters, namely, the ratio of the yield strength to the ultimate strength (σ_т/σ_в = max), the relative elongation (δ = min) and the relative narrowing (Ψ = min) can serve as selection criteria from a group of elements the metal of which has a smaller "conditional stock" of the RBF metal properties.

The proposed approach, parameters and criteria of equipment elements choice to be used for the selection and testing of the samples for their crack resistance will allow to select the metal from the equipment elements that initially have, out of those that are in the group under consideration, a smaller "conditional stock" of the RBF metal properties. A positive assessment of this metal testing for crack resistance in accordance with GOST 25.506-85 can be extended to the metal of the remaining elements of this group, which has a somewhat larger "conventional stock" of RBF properties.

Keywords: technological equipment; hydrogen sulfide environment; equipment elements; long-term operation; resistance to a brittle fracture; testing for crack resistance.

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UDC 622.276+621.643

IMPROVEMENT OF THE PREDICTION SYSTEM OF TECHNICAL AND
OPERATIONAL RESOURCE STATE OF WELLHEAD EQUIPMENT (p. 68)

Sergey Alexeevich Egurtsov,

Yuriy Vladimirovich Ivanov,

Igor Sergeevich Timoshko

LLC "Innovative Oil and Gas Technologies" ("IOGT" LLC)

10, bld. 1, Pervy Nagatinsky prosp., 115230, Moscow, Russian Federation,

e-mail: s.egurtsov@iogt.ru, y.ivanov@iogt.ru, timoshko@inbox.ru

Boris Alexandrovich Erekhinsky

PJSC "Gazprom"

156, Moskovsky prosp., St. Petersb urg, 190000, Russian Federation,

e-mail: B.Erekhinskiy@adm.gazprom.ru

The article attracts attention to the imperfection of methodologies and methods that are applied to predict the remaining resource of the wellhead equipment. The importance of development of new theoretical provisions and prediction methods to provide reliable prediction of the wellhead equipment technical state and the necessity of their operational time increase established by expert organizations when carrying out the industrial safety examination of is shown. The influence of the diagnostic reliability on the accuracy of determination of the technical state parameters and on the correctness of the residual resource calculation is shown as well. The main factors and sources that reduce the reliability of the remaining resource prediction are mentioned, some examples of the influence of the inaccurate determination of the state and resource parameters on a correct calculation are discussed. The necessity of early implementation of a set of organizational-technical measures aimed at the reliability of the diagnostic survey, prediction of the remaining resource and exclusion of the typical sources that decrease the resource prediction reliability is shown. A set of organizational-technical measures aimed at solving the problem of a reasonably prolonged resource capable of stimulating the increase of further safe operation periods of time, established by expert organizations during the examination is proposed. An example of these measures implementation at wellhead equipment of production enterprises is presented.

Keywords: wellhead equipment; technical diagnosing; technical state parameters; resource; resource prediction.

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UDC 69.059.25:621.644

DEVELOPMENT OF AN INNOVATIVE DEVICE FOR THE ACCURATE
POSITION DETERMINATION OF THE UNDERGROUND MAIN PIPELINE
WHEN ITS REPAIRING (p. 75)

Asvar Mikdadovich Akhmedov

Volgograd State Technical University

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

e-mail: asvar05@mail.ru

The article describes an innovative device that is used for a spatial position determination of a main pipeline. The device is constructed in such a way that one person at the control panel could simultaneously determine the position of the pipeline axis (the alignment), the pipeline depth, and fix the pipeline axis on the surface in a real-time mode. Apart from this, due to the marking line plotting on the surface, the device allows to carry out the subsequent technological process of the pipeline opening by means of an excavator without ranging poles and fixing the characteristic points on the surface. The proposed device is mounted on the basic vehicle thus providing free movement and work along the whole section of the pipeline, subjected to opening. The use of the given device when implementing the methods of major repairs will reinforce the repair and construction site body.

Keywords: innovative device; construction; main pipeline; determination of a pipeline placement; marks.

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UDC 622.276

THE METHOD OF IDENTIFICATION, LOCALIZATION AND EVALUATION
OF CORROSION VIOLATIONS BY MARKS (MARKERS, TRACERS) (p. 79)

Roman Konstantinovich Kalmykov

JSC "Zarubezhneft"

9/1/1, bld. 1, Armyansky per., 101990, Moscow, Russian Federation,

e-mail: KalmykovRK@ya.ru

Evgeniy Nikolaevich Kalmykov

LLC "ENKO Petroleum RUS"

9/1, General Glagolev str., 123432, Moscow, Russian Federation,

e-mail: ekalmykov1964@gmail.com

Ivan Ivanovich Vyberanets

LLC "KomiSeverTranzit"

4v, Transportnaya str., 169710, Usinsk, Komi Republic, Russian Federation,

e-mail: vyberanets@mail.ru

At present the problem of metals corrosion is very urgent. The largest corrosion losses are observed in fuel-energy complex (FEC), agriculture chemistry and petroleum chemistry. Besides the direct losses caused by corrosion and its disastrous effects for equipment, structures and materials there exist collateral loses, that are even bigger. They include expenditures directly caused by essential loss of operational capacity of the corroded technological equipment and production chains in the whole, equipment forced shut-downs due to accidents and the required repair works and preventive maintenance measures, as well as expenditures on the liquidation of accidents after effects, that rather often reach the level of small ecological catastrophes.

The most integral part of preventing corrosion accidents aftereffects is control over corrosion processes and metal protection.

Nowadays, the main instrument of the system of pipelines diagnostic testing is intra-pipe diagnosing by means of ultra-sound, metal magnetic memory and eddy currents, thermo-visional inspection as well as installation of samples-witnesses and monitoring of their wear-out.

Various anti-corrosion covers, that prolong the operational time of metal structures and equipment are used to prevent metal corrosion.

The main shortcomings of the above-mentioned methods are devices complexity, essential cost of diagnosing devices, long-term training of personnel, as well as impossibility of application of corrosion diagnosing methods being the consequence of the structural peculiarities of the object under consideration or the necessity of an objects withdrawal from the technological process.

The article presents the new monitoring and diagnosing methods of corrosion processes inside the technological equipment and pipelines based on using marks (markers-tracers). Its description, advantages and variants of application as well the results of pilot-industrial testing are given in detail.

Keywords: marks; corrosion; method; diagnostics; cover; sample; marker-tracer; experimental-industrial tests.

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

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