Drilling

Optimization of drilling equipment functioning is the goal of a drilling experts group. OOO "TRIAS" provides you specific solutions focused on reducing of the penetration cost. We know how to drill, how to drill faster, cheaper and more efficient. Average price of the drilling bit is 5% of the drilling process cost, but the judicious selection of drilling tool can cut back on the length of the drilling process and, consequently, a large amount of cash assets.

Our experts will work with you to:

• Analyze products of all drilling equipment manufacturers.

Х Optimize the current equipment functioning and make recommendations on new drilling bits

Х Recommend bottomhole assembly for specifically selected bits in accordance with the terms of bit wear.

Х Implement measures to extend the wellbore.

Х Educate and provide trainings; both earmarked single-discipline for engineering and technical personnel, and for employees in other areas of your companies.

Ltd. "TRIAS" Technical Consultants qualitatively will improve your drilled well, will prolong the life of bottomhole assembly, will help reduce the drilling time and will provide, thereby cost cutting. We will choose the best package of solutions of your problem, rather than imposing specific equipment

Directional and horizontal drilling

TRIAS company offer a full service of wells design and directional drilling support, which enables time shortening and drilling cost cutting, providing acquisition of high-accuracy data on well location, as well as on the reservoir parameters to meet the challenges , when you run drilling both in standard and in the abnormal operating conditions. Our team of highly qualified and experienced professionals will help you to successfully plan and execute drilling works with as effectively as possible with minimum time consumption.

Managed pressure drilling and underbalanced drilling

There is a coined word in the industry - managed pressure drilling (MPD) for the system when the flow from the well is not specifically set off during drilling , but the pressure profile in the well is precisely controlled using closed and under high pressure drill fluid recirculation system. Not relying only on the hydrostatic drilling fluid column, managed pressure drilling systems regulate the wellbore pressure through the instrumentality of revolving head of blow-out preventer with ground monitoring system of pressure of returning from the annulus mud.

During underbalanced drilling the emphasis is on protection of reservoirs from damage - especially in depleted reservoirs with low pore pressure. Causing a fluid influx from the reservoir during drilling, we prevent the skin- effect and consequence negative impact on well productivity and reservoir return. Underpressure in the wellbore also increases the penetration rate, lengthens life of bit and prevents drilling mud loss into the reservoir, thus minimizing the probability of differential pressure sticking.

Pressure control during the drilling process - an advanced form of primary well control designed to prevent downtime and costs of non-productive time involved in traditional methods of drilling. The most common variants of pressure control during drilling provide an opportunity for using closed mud returns system and a system, which can withstand high pressure. Last-mentioned allows, in turn, more precisely controlling the pressure profile around the wellbore.

The advantage of pressure control during drilling should be considered also the ability to adjust the bottomhole pressure with minimal interruption of the drilling operations. Unlike underbalanced drilling, which main purpose is to increase well productivity by minimizing the risk of productive areas damage, the main purpose of the pressure control technology during the drilling process is decreasing its value. Presence of zones with diminished pore pressure, overpressure, and areas with not large pressure margins (pore pressure and fracturing pressure are same) can lead to drilling cost increase. When using conventional drilling techniques solution of drilling problems resides in another casing landing, weighting up mud, if not a cancel of the drilling project. In conventional drilling bottomhole pressure is determined solely by mud weight, hydrostatic pressure and dynamic friction component sum. In this case, the only bottom-hole pressure stimulation method without stopping drilling and changing the basic mud weight - is on and off switching of mud pumps. A significant number of problems associated with drilling (and, consequently, with the working hours without bottom-hole deepening), currently facing the offshore drilling industry, may be to some extent solved by forming-up more accurate wellbore pressure control technology. Long-term interruptions of drilling are not required in this case.

Multilateral drilling

Exploration of fields using multilateral wells is the most technically and economically efficient way of exploratory drilling, as it provides geological project task performance as a result of scope of drilling, time and material resources expenses contraction while simultaneous improving the quality of well targeting along the paper lines in datum points of exploration grid, and when multiple-cluster wells drilling - also reliability enhancement of mineral reserves reserve calculation and oil recovery index upgrading.

Drilling multilateral wells can be for a wide range of geological problems; especially drilling that sort of wells is efficient for solving pad geological problems, when one well performs exploration of considerable area deposits, providing the highest speed of task accomplishment. To perform that sort of tasks such multilateral wells shall be designed and drilled along the optimal paper lines, while spudding and subsequent deepening of extra bores is based on the accounting of hole crooking and technical tools that provide efficient drilling process. There are several options of drilling multilateral wells.

Drilling with casing and pipe liner

Drill pipes round trip cause differential pressure and swabbing effect in the wellbore. Pressure differences can lead to loss of circulation due to the fracture of permeable or naturally fractured beds. Relieving the wellbore pressure by swabbing can potentially evolve formation fluids influx into the wellbore and cause wellbore instability. Both of these problems may require significant time and financial resources to cope with them.

DwC system offers one of several alternatives. This system eliminates the need for tripping and use of BHA, which, in turn, speeds up the drilling process and reduces the risk of casing string permanent location at the bottomhole or near it. DwC system simplifies the construction of the well, potentially reducing a conductor diameter, as well as cutting requirements of casing or liner use. There is even the possibility of complete removal of the casing or liner at successful drilling through a zone with a variable pressure or a loss of circulation zone.

Х The range of use environment - from very soft upper rocks to deep-seated rocks

Х Conductors drilling per one pipe tripping operation, which lead to downtime reduction;

Х Casing string drilling through complicated intervals, such as loss of circulation zones, transition zones and unstable rocks;

Х Drilling with liner through complicated intervals or higher than casing string is landed;

Х Drilling and simultaneous plugging in the casing string, or the use of other measures for isolating loss of circulation zones, transient zones or in wellbore instability conditions;

Х Expansion of the casing strings or liners in conditions of wellbore instability, increased reservoir cavernosity or strongly swelling or moving rocks.

Coiled tubing drilling

Coiled tubing drilling was first used in the mid-1930s. However, only in the last 10 years the full potential of this drilling technology has become obvious. It is now clear that the flexible tubing can be efficiently and successfully used in the drilling of new wells.

Initially, coiled tubing drilling technology was developed as a pigging of wells. Currently, this technology has a vast scope of application in the oil fields.

Control of drilling equipment

Cementation

The company offers control of cementing systems application by service companies to implement a successful cementing, including liner wiper plugs, expansion shoes, underreaming shoes and centralizers.

Successful primary cementing operation provides formation of high-tensile cement sheath for fixation of the casing string and provides zonal isolation. Good insulation makes it possible to prevent well performance degradation, to provide control of cross flows or flows on the surface, as well as reduce the formation water rate and to increase the effectiveness of geological and technical actions.

TRIAS company’s design and control of the cementing process, control of pumping system functioning and blending process corresponds best international industry standards.

Usage of TRIAS CompanyТs engineering and supervising services when preparation and handling of cementing works provides you with the continued and safe well operation.

Geological and engineering survey

Geological and engineering survey operability varies widely from the simplest level without workforce planning to employment of modern technologies and highly skilled personnel. Currently, geological and engineering survey is becoming an information center during well construction, including surveillance over drilling parameters such as weight on bit, table torque, ROP, drilling mud level, mud flow rate, and the data obtained from other operators.

Geological and technological survey of wells conducted by the company includes:

Х Reservoir property investigation - includes analysis of physical and chemical properties of the bit cuttings to define and categorize reservoir rock, thereby helping to identify productive zones.

Х Well path control - is to determine the optimal well path when directional drilling.

Х Optimizing the drilling process based on the drilling parameters evaluation to adjust drilling rate and as a result to reduce the cost of works.

Х Determination of fractures and cracks in the rock around the wellbore, which may contain oil or gas.

Х Identify thin horizons and layers that may contain hydrocarbons. Often thin layers cannot be detected by conventional methods, and there is emerging a necessity of more sophisticated systems for mud logging.

Х Identify gas, oil and water contacts.

Х Analysis of the composition of gas evolved into drilling mud from the formation. Used for complex surveys, such as identifying of gas, oil and water contacts, light-duty zones, fracture porosity and well path control when sub horizontal drilling.

Х Determination of quantitative content of carbonates in the rock in order to obtain additional information in the reservoir characterization study.

Drilling muds

LLC " TRIAS " provides drilling muds service, which is carried out with the use of the cutting-edge formulations , where the optimum working properties are matched for effective work of rock cutting tools in different mining and geological conditions, in wells of any profile, function and level of complexity.

Drilling muds service includes:

Х Development and integration of well flushing case plan, including the ranging of systems and optimal formulations of drilling muds for specific technical, technological and geological conditions.

Х Performance of a drilling rig audit, determination of the degree of readiness for providing services and opportunities to optimize the circulation system and mud treatment unit.

Х Support of works by qualified drilling mud engineers, provided with mobile accommodation, laboratory, individual protective equipment, office equipment and the needed software.

Х Engineering services complex provides laundry management and control of the preparation, maintenance and regulation of the properties during drilling operations according to the approved "Well flushing program"

Х A complete set of flush liquid parametering using laboratory equipment, by the API R.P. 13B-1, API R.P. 13B-2 standards.

Х Monitoring of the activities implementation and taking steps to prevent accidents and complications.

Х Control of rational spending and proper storage of reagents and materials, optimal use of mud cleaning system equipment.

Х Providing daily and close-out well reporting.