ISSN 1999-6934

Scientific-technical journal

EQUIPMENT AND TECHNOLOGIES

FOR OIL AND GAS COMPLEX

                                                                                                           published since 2001

October 2017                                          ¹ 5                                         6 issues per year

 

CONTENÒS

 

GEOLOGICAL AND GEOPHYSICAL STUDIES AND DEVICES

 

Ryabchenko S.V., Voyakin E.A., Ponomareva E.V. A new approach to the "digital core library" concept implementation in the oil and gas industry (p. 4‑10)

 

Tishkov A.A. Formation pressure drop in the oil deposits of Pripyat trough as a geological-hydrodynamic method of oil recovery enhancement (p. 11‑15)

 

MACHINERY AND EQUIPMENT

 

Yakimov S.B., Kaverin M.N., Golub I.M., Kuryaev S.V., Kolpakov M.A. Study of ESP advantages operated in a periodical mode in the wells complicated by sand removal (p. 16‑20)

 

Mukhametshin A.A., Timkin N.Ya., Arslangaleev I.G., Garaev N.A. Openhole deflection wedges. Practical experience and prospects of use (p. 20‑24)

 

Oganov G.S., Kempf K.V., Naboka R.R., Potapov A.V. Project decisions when constructing multilateral wells in the shelf of Vietnam (p. 24‑27)

 

Babaev S.G., Gabibov I.A., Kerimova S.V. Development of a valve unified construction of an oilfield pump based on the study of evolution parallel lines (p. 28‑33)

 

Ivanovsky V.N., Kuzmin A.V., Matveev A.V., Sabirov A.A., Sharapov M.M. Possibility of using aluminum alloys to manufacture stages of electric submersible centrifugal pumps (p. 33‑39)

 

Khabibullin M.Ya. Improving reliability of an oilwell sucker-rod pump (p. 39‑43)

 

PIPELINE TRANSPORT

 

Koryakin A.Yu., Mukhetdinov R.A., Tipugin A.A., Burmistrov N.A. Prospects of antiturbulent additives use when transporting condensate of achimov deposits (p. 44‑48)

 

Alexandrov O.Yu. Protection of underground pipelines from the harmful influence of geomagnetically induced currents (p. 48‑54)

 

Isupova E.V. Analysis of means and methods providing effective electrochemical protection of oil and gas pipelines on the territory of industrial sites (p. 55‑63)

 

Akhmedov A.M. A device used to improve the technological process of deposit welding of a shrunk-on ring on a welded joint of a main pipeline (p. 63‑68)

 

Information on the articles (p. 69‑77)

 

 

Information on the articles

 

UDC 622.243.572

 

A NEW APPROACH TO THE "DIGITAL CORE LIBRARY" CONCEPT IMPLEMENTATION
IN THE OIL AND GAS INDUSTRY (p. 4)

 

Sergey Vasilievich Ryabchenko

 

Northern (Arctic) Federal University named after M.V. Lomonosov

17, Severnaya Dvina naberezhnaya, Arkhangelsk, 163002, Russian Federation,

e-mail: s.ryabchenko@narfu.ru

 

Evgeniy Alexandrovich Voyakin,

Elena Vsevolodovna Ponomareva

 

LLC "IBS Expertise"

9B, Dmitrovskoe shosse, Moscow, 127434, Russian Federation,

e-mail: evoyakin@ibs.ru, eponomareva@ibs.ru

 

The article gives a brief overview of the current state of the technologies applied to control the data, being the results of the core studies, as well as discusses the problems of core material collection and storage. The approaches to solving these problems both in Russia and in foreign countries are considered. The advanced methods of core material research, used in the technology of "Digital core storage " are presented. The experience of development of domestic integrated control systems over design and hydrocarbons production performed in the framework of the state program on import substitution is presented. The author’s algorithm of the "Anti-blowout" filter applied to smooth the noisy data of wells’ and cores’ geophysical surveys is described.

 

Keywords: digital core storage; oil and gas production; data smoothing.

 

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UDC 622.276.1/.4:552.54

 

FORMATION PRESSURE DROP IN THE OIL DEPOSITS
OF PRIPYAT TROUGH AS A GEOLOGICAL-HYDRODYNAMIC METHOD
OF OIL RECOVERY ENHANCEMENT (p. 11)

 

Andrey Alexandrovich Tishkov

 

Production association "Belorusneft"

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

e-mail: a.tishkov1@beloil.by

 

A deposit’s formation pressure is an important parameter characterizing the formation energy. Hydrocarbon reserves extraction is accompanied by a formation pressure drop, herewith, under the constant load of the overlying rocks (lithostatic pressure), the deposit’s effective pressure increases, being the difference between lithostatic and formation pressures.

Increase of the formation effective pressure due to the formation pressure drop leads to the deformation processes occurrence like reservoir-rocks characteristics deterioration and, consequently, to wells productivity decrease. Such understanding of the reservoir-rocks behavior under the influence of increasing effective stresses, along with the desire to avoid oil degassing, underlies the widespread opinion about the need to maintain high formation pressure in the deposit for a long time by pumping water into it, sometimes even different in composition and properties from the actual formation water.

The article considers a positive component of the deformation processes during the decrease of the formation pressure in complicatedly-composed reservoirs of Pripyat trough is reduced using the example of physical modeling of the processes of oil displacement from the formation core models.

 

Keywords: core material; reservoir; reservoir characteristics; permeability; pressure; filtration; displacement factor.

 

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UDC 622.276

 

STUDY OF ESP ADVANTAGES OPERATED IN A PERIODICAL MODE
IN THE WELLS COMPLICATED BY SAND REMOVAL (p. 16)

 

Sergey Borisovich Yakimov

 

PJSC "NK" Rosneft"

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

e-mail: s_yakimov@rosneft.ru

 

Mikhail Nikolayevich Kaverin,

Ilya Mikhailovich Golub,

Sergey Vasilievich Kuryaev

 

LLC "RN-CEPITR"

6, Pervomaiskaya str., Tyumen, 625000, Russian Federation,

e-mail: mnkaverin@ceptr.rosneft.ru, imgolub@ceptr.rosneft.ru, svkuryaev@ceptr.rosneft.ru

 

Maxim Alexandrovich Kolpakov

 

JSC "Samotlorneftegaz"

4, Lenin str., Nizhnevartovsk, 628606, Russian Federation,

e-mail: makolpakov@rosneft.ru

 

The article presents the results of the analysis of the types and wear-out of electric centrifugal pumps’ working stages that are used in the sand-bearing boreholes of the AB1-2 formation of Samotlor oil field with a production rate of up to 40 m3/day in the periodical and continuous operational mode. The analysis showed that in case of using pumps working stages of a floating type of a two-bearing structure made of type 1 niresist material with intermediate bearings installed through 0,5 m, the operational mode does not significantly affect the axial wear-out value. At the same time, cases of erosive flushing of the devices guiding lines and complete destruction of the impellers because of wear-out during periodic operation are less common. Based on the results of the analysis, it is concluded that it is necessary to use pump protection devices from sand fractions larger than 0,15 mm, which cause erosive flushing of the devices guiding lines both during periodical and continuous operation. To reduce the axial wear-out in wells of the AB1-2 formation of Samotlor oil field, compression-type pumps should be used.

 

Keywords: ESP operation; duration between-repair period (BRP) of ESP; sand control.

 

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UDC 622.248.67

 

OPENHOLE DEFLECTION WEDGES.
PRACTICAL EXPERIENCE AND PROSPECTS OF USE (p. 20)

 

Almaz Adgamovich Mukhametshin

 

"TatNIPIneft", PJSC "Tatneft" named after Shashin

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

e-mail: maa@tatnipi.ru

 

Nafis Yagfarovich Timkin,

Ilgiz Gusmanovich Arslangaleev,

Nafis Anisovich Garaev

 

LLC "Perekryvatel"

15, Leninogorsky tract str., Aznakaevo, 423330, Republic of Tatarstan, Russian Federation,

e-mail: per@sistemaservis.ru

 

The paper presents comparative analysis of two existing methods to overcome well drilling challenges: sidetracking from cement plugs or a deflection wedge. The primary criteria for application of these methods were challenges encountered while drilling the main hole (such as junk in hole, rock caving, jamming of drill strings, failure to adjust well inclination angle) which could not be eliminated by other methods.

The technology of drilling sidetracks from a cement plug is not new and has already found wide application. However, it has some disadvantages. Cement plugs often fail to be set or develop sufficient strength in lost-circulation zones or oil and gas manifestations. Setting a cement plug with the necessary properties requires multiple cementing operations; sidetracking and key-seat reaming is time-consuming; cement plug destruction during tripping operations is frequent.

The technology of sidetrack and rathole drilling from BS-245 deflection wedge in wells drilled with a 215,9-mm drill bit enables 3,5 times reduction of the time required to perform these operations and 2 times reduction of the costs. The main disadvantages of this technology include the following: necessity to condition the hole before running the deflection wedge and impossibility to cleanout and condition the wellbore while running the wedge to design interval.

To eliminate the above-said disadvantages, KOT-216 OC deflection wedge has been designed in "TatNIPIneft" Institute to ensure its placement directly in a specified interval, enable simultaneous conditioning and cleanout of trouble intervals in the hole, and eliminate the necessity for cementing operations to shut-off trouble zones.

Application of the proposed technology and tools will facilitate reduction of time and costs required to overcome drilling challenges when all other methods are ineffective.

 

Keywords: well drilling; drilling challenges; cement plug; sidetrack; deflection wedge; profiled pipe; anchor.

 

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UDC 622.243.2

 

PROJECT DECISIONS WHEN CONSTRUCTING MULTILATERAL WELLS
IN THE SHELF OF VIETNAM (p. 24)

 

Garry Sergeevich Oganov,

Andrey Valerievich Potapov

 

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

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

e-mail: shelf1998@mail.ru, Potapov_Andrew@bk.ru

 

Konstantin Viktorovich Kempf,

Ratmir Rudolfovich Naboka

 

JSC "Zarubezhneft"

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

e-mail: KKempf@nestro.ru., RNaboka@nestro.ru

 

The construction of multilateral wells is the actual trend in directional drilling technology. Development of offshore fields requires urgent application of technologies that reduce the time of well construction and, as a result, their cost. This is especially important for fields with small reserves. The article presents the main technological solutions for well construction. The necessary level of multilateral wells complexity is determined. The equipment was selected in view of its availability in a particular region.

 

Keywords: multilateral well (MLW); complexity ranking of MLW; jack-up floating drilling rig; project profile of a well; pilot (assessment) wellbore; reduction of wells drilling costs.

 

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UDC 621.655.32

 

DEVELOPMENT OF A VALVE UNIFIED CONSTRUCTION OF AN OILFIELD PUMP
BASED ON THE STUDY OF EVOLUTION PARALLEL LINES (p. 28)

 

Sabir Gabibovich Babaev,

Sabina Vladimirovna Kerimova

 

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

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

e-mail: professor_lk@mail.ru, sabina.v.karimova@gmail.com

 

Ibragim Abulfasovich Gabibov

 

Azerbaijan State University of Oil and Industry

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

e-mail: h.ibo@mail.ru

 

The article analyzes the results of researches that were conducted to study the evolution of construction-technological perfection of valves of high-pressure oilfield and drilling pumps.

Taking into consideration the analysis of literature information, studies of "evolution parallel lines" and expert assessment of the influencing factors, the most significant of them are identified.

On the basis of the conducted researches, the conceptual project of a valve unified construction of an oilfield pump is developed.

The expediency of reviewing the "parallel lines of evolution" approach in view of its application to the second system – drilling pumps valves – is also shown.

 

Keywords: technical system; operational cycle; evolution; parallel lines; drilling pump; oilfield pump; valve; disc; seat; packing seal.

 

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UDC 622.276.054.23

 

POSSIBILITY OF USING ALUMINUM ALLOYS TO MANUFACTURE STAGES
OF ELECTRIC SUBMERSIBLE CENTRIFUGAL PUMPS (p. 33)

 

Vladimir Nikolaevich Ivanovsky,

Anton Vyacheslavovich Kuzmin,

Albert Azgarovich Sabirov

 

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

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

e-mail: ivanovskiyvn@yandex.ru, ànt1932@yandex.ru, albert_sabirov@mail.ru

 

Alexander Vladimirovich Matveev,

Marat Minagdasovich Sharapov

 

LLC "Metal-Invest-K"

104, office 5, Ostrovsky str., Kazan, 420012, Republic of Tatarstan, Russian Federation,

e-mail: metinvest09@mail.ru, info@karat.com.ru

 

During oil production intensification, a well fluid more often includes a large amount of free gas and mechanical impurities. It leads to a significant degradation of pump characteristics due to their flow channels overlap by gas accumulations, clogging of these channels by mechanical impurities, rapid wear-out of the main working surfaces of the stages. One of the variants of the above-mentioned problems solution is the use of electric submersible centrifugal pumps (ESP), the stages of which are equipped by open impellers (OI). These impellers are less susceptible to scaling, reduce the mounting height of the stages, the rotor’s weight and unbalance, the installation vibration during operation, especially at high speeds. The construction of open impellers allowed to part with foundry technology and to use V-95T aluminum alloy with a micro-arc oxidation (MAO) of the working surfaces as a structural material. This material properties allow to reduce scaling, corrosion and wear-out. The mass of the impellers made of V-95T aluminum alloy is 7 times less than the mass of the standard impeller. The OI surface microhardness amounted to HV 1000…1200. Bench tests proved the fact that OI manufactured of the aluminum alloy coated by MAO have wear-out resistance almost equal to the parts made of hard alloy.

The created stages were bench tested in Gubkin Russian State University of Oil and Gas as well as at the ESP stand test in LLC "Izhnefteplast". The pump sections that are assembled from pump stages with open impellers made of aluminum alloy with MAO coating are now experimentally tested in the wells of LLC "LUKOIL–Western Siberia".

 

Keywords: electric centrifugal pump; pump stage; impeller of the open type; aluminum alloy; micro-arc oxidation; wear-out resistance; experimental field tests.

 

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UDC 622.276.054.22

 

IMPROVING RELIABILITY OF AN OILWELL SUCKER-ROD PUMP (p. 39)

 

Marat Yakhievich Khabibullin

 

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

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

e-mail: m-hab@mail.ru

 

Efficiency enhancement of an oil-well sucker-rod pump (WSRP) use can be achieved by eliminating the plunger jamming in the cylinder and by reducing the load on the rod string. To do this, it is proposed to use a shortened plunger in the pump design (its length is 400…500 mm depending on the well dynamic level). The plunger outer surface is made in a completely new form, that allows increasing the pump feed rate and eliminating jamming of the plunger. The latter one is possible due to mechanical impurities (sand) washing out when the plunger moves downward.

The equations to be applied for leaks detection in the gap of the plunger pair are obtained. The use of this plunger allows the following: to exclude jamming of the plug in the pump cylinder; to reduce the loads on the column of pumping rods when it moves downward; to repeatedly use the plunger in worn-out cylinders with the replacement of sealing rings and a discharge valve; to prolong the between-repair period of the pump by shortening the length of the plunger (up to 500 mm instead of 1200…1500 mm) and changing the depth of the pump suspension; to reduce leakage of fluid in the pump's plunger pair. Positive results of preliminary commercial use of the shortened plunger in two wells are given.

 

Keywords: plunger; sealing ring; eccentricity; jamming; feed; ratio.

 

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UDC 622.692.4

 

PROSPECTS OF ANTITURBULENT ADDITIVES USE
WHEN TRANSPORTING CONDENSATE OF ACHIMOV DEPOSITS (p. 44)

 

Alexander Yurievich Koryakin,

 

LLC "Gazprom dobycha Urengoy"

8, Zheleznodorozhnaya str., Novy Urengoy, 629300, Tyumen region, Yamal-Nenets autonomous territory, Russian Federation,

e-mail: referent@gd-urengoy.gazprom.ru

 

Rustyam Alfridovich Mukhetdinov

 

Gas Field Department of Achimov deposits development, a branch of LLC "Gazprom dobycha Urengoy"

5a, bld. 5, Sovetsky microregion, Novy Urengoy, 629300, Tyumen region, Yamal-Nenets autonomous territory, Russian Federation,

e-mail: r.a.mukhetdinov@gd-urengoy.gazprom.ru

 

Anton Alexandrovich Tipugin,

Nikolay Alexandrovich Burmistrov

 

Engineering and Technical Center, a branch of LLC "Gazprom dobycha Urengoy"

11a, the 26th Congress of the CPSU str., Novy Urengoy, 629300, Tyumen region, Yamal-Nenets autonomous territory, Russian Federation,

e-mail: a.a.tipugin@gd-urengoy.gazprom.ru, n.a.burmistrov@gd-urengoy

 

The main prospects for the development of Urengoy oil and gas-condensate field are associated with the involvement of Achimov deposits in the development. The commissioning of new wells will ensure an increase in the production of gas unstable condensate. Condensate production increase will bring growth of the load on the existing condensate pipeline, thus stimulating the necessity of increasing the pumping equipment power and additional energy costs for pumping.

Transportation provision is possible by building additional pipelines, but this requires significant capital costs. Improvement of hydrodynamic parameters when transporting liquid hydrocarbons through pipelines in order to increase their productivity can be achieved using anti-turbulent additives. The selection of an effective anti-turbulent additive, which allows increasing the capacity of the pipeline of unstable condensate of Achimov deposits at constant pressure, without affecting the physical-chemical and operational parameters, is an urgent problem.

 

Keywords: Urengoy oil and gas-condensate field (UOGCF); unstable condensate (UC); complex gas treatment unit (CGTU); plant for gas-condensate preparation for transportation (PGCP); condensate pipeline; pressure drop; flow-rate; anti-turbulent additives (ATA).

 

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UDC 621.3.014.6

 

PROTECTION OF UNDERGROUND PIPELINES FROM THE HARMFUL INFLUENCE
OF GEOMAGNETICALLY INDUCED CURRENTS (p. 48)

 

Oleg Yurievich Alexandrov

 

LLC "Gazprom transgaz Moscow"

101, Gazoprovod settl., Moscow, 108814, Russian Federation,

e-mail: aleksandrov@gtm.gazprom.ru

 

The article considers some specific features of stray currents, that cause a corrosion of underground pipelines. There methods of oil and gas pipelines protection from corrosion damage caused by stray currents are generalized. It is shown that at present the range of the equipment and methods that can be applied to protect oil and gas pipelines is quite wide, but all the methods discussed are not adapted for use on pipelines susceptible to the influence of geomagnetically induced stray currents. To solve this problem, there has been developed a device providing protectors connection only during magnetic storms, herewith, the negative effect on the existing electrochemical protection system is minimal.

 

Keywords: stray currents; geomagnetically induced currents; corrosion of main gas and oil pipelines; methods of corrosion protection.

 

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UDC 621.3.014.6

 

ANALYSIS OF MEANS AND METHODS PROVIDING
EFFECTIVE ELECTROCHEMICAL PROTECTION OF OIL AND GAS PIPELINES
ON THE TERRITORY OF INDUSTRIAL SITES (p. 55)

 

Ekaterina Vladimirovna Isupova

 

Ukhta State Technical University

13, Pervomaiskaya str., Ukhta, Komi Republic, 169300, Russian Federation,

e-mail: eisupova@ugtu.net

 

The urgency of the article is caused by the necessity of studying the problem of the groundings negative influence on the efficiency of facilities cathodic protection in the territory of sites. The article gives examples of unsatisfactory work of electrochemical protection against corrosion caused by the shielding effect on the part of groundings protection systems of power plants as well as the results of the overview and analysis of the regulatory documentation requirements in the field of pipeline systems protection from corrosion and design of the systems of electrical equipment grounding on the territory of sites. Based on the results obtained, a classification that allows to systematize the main directions of efficiency enhancement of pipelines electrochemical protection is developed. The necessity of improving the design principles of pipelines anti-corrosion protection as well as developing some methodology for start-up, testing and optimization of the operation of pipelines’ cathodic protection systems with account of the grounding systems effect is substantiated.

 

Keywords: electrochemical corrosion protection; pipeline system of industrial sites; grounding of power plants; shielding of cathodic protection currents.

 

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UDC 621.791.92

 

A DEVICE USED TO IMPROVE THE TECHNOLOGICAL PROCESS
OF DEPOSIT WELDING OF A SHRUNK-ON RING ON A WELDED JOINT
OF A MAIN PIPELINE (p. 63)

 

Asvar Miqdadovich Akhmedov

 

Volgograd State Technical University

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

e-mail: asvar05@mail.ru

 

The article proposes an innovative device to be used in the technological process of deposit welding for a shrunk-on ring on the welded joint of a main pipeline. The device is made so that it allows a high-quality deposit welding of a shrunk-on ring observing the required processing mode. Moreover, the device is made so that only one insulation worker can control the heating process of the welded joint easily and promptly. The article presents 3D simulation spatial models of the device that provide visualization of the proposed device design. The technology of deposit welding of a shrunk-on ring onto a main pipeline welded joint is studied in the article using the proposed innovative device and its work is shown. The device will enable to improve the repair and construction equipment and to reduce the time of conducting insulation works on the welded joints of a main pipeline.

 

Keywords: main pipeline; construction of a pipeline; overhaul; loop line; welded joint of a pipeline; shrunk-on ring; technological process of deposit welding of a shrunk-on ring.

 

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