Own patented equipment for identification of the destruction and wedging core in the core tube
Specialized core extractors for all types of rocks
Efficient technologies to stabilize and maintain the integrity of the core after extraction

Preview

Telescopic core tubes

Telescopic core tubes were designed specifically for coring in highly fractured rocks. Their feature is the presence of two sliding internal pipes. The use of telescopic core tubes makes it possible to eliminate two core jams per run and, accordingly, reduce the number of round-trip operations by 2 per each run.

Advantages

  • Increased core recovery.
  • Increased meterage per 1 run.
  • Reduce the number of round-trip operations by 2 per each run.
  • Coring with isolating fluid
Telescope core.png
Orienting core system

In order to receive more information about the reservoir, such as grains, change in permeability depending on the azimuth is used oriented core – core recovery with its spatial orientation.

In order to receive more information about the reservoir, such as grains, change in permeability depending on the azimuth is used oriented core – core recovery with its spatial orientation.

Slips and knives.png

Final position on marking knife.png

Marked core.png

Result: better and exact information on reservoir properties spatial distribution.

“Clean Core” system

Protecting core from the negative impact of drilling mud on the initial properties of the material is one of the most important tasks in the design and selection of equipment for coring.

Special design of the core bit and the core catchers shoe minimizes the contact time and the degree of influence of the drilling fluid on the core.

  • Special configuration core bit (tangent nozzles, junk slot shape)
  • Elongated shoe part with groove seal preventing mud passage
  • Isolating agent “IZOKOR” envelopes core surface

Result: core protection from mud, properties retention, more qualitative and representative core for analysis.

clean core.png

Core jam detector

Using a core jam detector* (RZK) a patented development that allows real-time identification of the destruction and wedging of a core in a core tube or a set of core catchers makes it possible to significantly increase core recovery in loose, alternating and clastic rocks where it is impossible to determine jamming by ROP reduction or pressure loss. During the core jamming the flushing ports in the RZK overlap and the pressure on the manifold manometer increases sharply, after which you can take a set of measures to eliminate the core jamming and continue further drilling.

*Russian Federation patent

регистатор.jpgjamming.pngjam graph.png

Valve system for core protection from cuttings and mud

Coring into the isolating fluid makes it possible to obtain a large array of additional data on the reservoir. However, when coring in wellbores with a complex profile that reveal unstable interlayers where there is a constant formation of sludge pads and rock debris, there is a great risk of sludge getting into the core tube and squeezing the isolating fluid during trip in hole of the assembly. This system will prevent the above complications.

Valve system to protect core from cuttings and drilling mud is designed to ensure the purity of core.

Advantages

  • Protection of core receiver from mudding up during RIH during coring with isolating fluid.
  • Protection of core from drilling mud while drilling.
  • Uniform core enveloping with isolating agent.
  • Protection against cuttings and drilling mud penetration into core receiver during reaming (in complicated wellbores).

Клапаанная-система.jpg

Core tubes

Fiberglass core tubes

Specially designed single-use core tubes have low friction coefficient of the inner surface, which reduces the likelihood of core jamming. After POOH they are sawn into meter sections, closed with plugs and placed in boxes for transportation.

стеклопластик.jpg

Aluminum core tubes

Aluminum core tubes of special design for coring in rocks of any category of coring difficulty. Have low friction coefficient of the inner surface. Used when working in cross-sections with abnormally high temperatures.

алюминий.jpg

Anti-jamming system

Jamming in core tube during coring in fractured rocks is a major cause of premature drilling interruption. The increase in the number of round-trip operations due to core jams can lead to a significant increase in well construction time. Using anti-jamming systems to eliminate 1 jam can effectively solve this problem.

Advantages

  • The elimination of one core jam.
  • Reduction of well construction time by reducing the number of round-trip operations.

Internal-furnishing_small.png

Universal load frame for running tubes without bending

A careless attitude to the lifted core after extraction to the surface can bring all efforts to achieve a quality result to nothing.

During the extraction of tubes with core from the barrel and its lowering onto the catwalks for further segmentation, integrity damage and the formation of man-made cracks are possible. To ensure the safety and integrity of the core, it is necessary to use a special load frame that prevents tubes bending.

* Russian Federation patent

universal frame.png

Internal outfit
безопасный-переводник.jpg

Safety joint

Special unit of the barrel allowing to unscrew the tool and remove the inner core tube with a core in the event of a sticking of core barrel.


цанговый-кернорватель.jpg

Collet core catcher

The most versatile core catcher for coring is manufactured using a unique patented technology.


рычажковый-кернорватель.jpg

Lever core catcher

A core catcher for all types of rocks allows tearing off and hold fractured and unbound core.


пружинный-кернорватель.jpg

Spring core catcher

Core catcher specially designed for loose and incompetent rocks. Provides maximum overlap and protects core from pouring out when pulling to the surface.

Gas-relief device during removal of core (outgassing)

During coring in gas-containing rocks, when pulling out of hole, gas can be released into the core tube, which can lead to the destruction of the core during its extraction. Use of accessories and valve.

клапан-стравливания.jpg

For outgassing while POOH:

  • Set-in valves
  • Core tube valve

узел-стравливания.jpg

For outgassing when core extraction:

  • Gas relief unit
  • Device for safe core tube sections disassembly when coring gas saturated core.
Core residual gamma activity scanner

Designed to scan recovered core along the length in rig conditions and determine the total gamma activity to bind the core to the gamma log.

  • Allows determining the location of sampling for the conservation of core.
  • Operating temperature range from -30 to +60°С.

Advantages:

  • Operated from 220 mains and standalone.
  • Water and shockproof housing.
  • Bluetooth and 3G communication.

гамма-логгер.jpg

Core packing and stabilization

Core stabilization

After removing core tube from the barrel in order to preserve the integrity and information capacity of the core it is necessary to take measures to stabilize it.

Today the most effective ways are:

  • Core paraffining
  • Fast-curing polyurethane foam
  • Freezing
  • Plastic busing
оборудование-для-стабилизации.jpg

Core UV photography

The introduction of tracer agents in the drilling mud with further photographing of the ends in ultraviolet light allows estimating the zone of mud filtrate penetration.

core uv photo.png

Core storage and shipping containers

During transportation and storage tubes with core can experience negative stress loads, which can lead to core destruction. To preserve the integrity and original quality of the rock it is necessary to use special shipping containers equipped with vibration damping inserts. Also such containers can be used to freeze the core and maintain the required negative temperature during storage and transportation.

case core transport.png

Documentation

Reviews

  • At the facilities of Ufa subsidiary "RN-Drilling", was successfully performed core recovery using the SK-195/100 core barrel. The application of the technology made it possible to increase the core recovery rate and reduce the number of round-trip operations.

  • For the first time at the facilities of NSH ASIA DRILLING LLC, SK-136/80 "TRIAS" core barrel produced by “BURINTEKH”, Ltd was successfully used.

  • Feedback from ROSPAN INTERNATIONAL on the performance of coring services: 13 exploratory wells were successfully drilled with the provision of a range of technological services, more than 1800 meters of core were recovered.

  • At the facilities of LLC "Rospan-International" the engineering and technological service “BURINTEKH”, Ltd performed coring services using coring equipment of its own production. The work was done with high quality, without deviations.

  • For the first time coring tools produced by “BURINTEKH”, Ltd was used at the facilities of the Urengoy Burenie branch of Gazprom Burenie LLC. Equipment and services ensured high quality and focus on improving the efficiency of well construction.

  • A record result was achieved in terms of the mechanical drilling speed - 0.64 m/h (core bit 152/80 B 12121 AM.31 and core barrel SK-127/80-02).

  • At the facilities of Bashneft-Drilling LLC, the engineering and technological service of “BURINTEKH”, Ltd performed coring services in a horizontal well using coring equipment of its own production. The work was done with high quality, without deviations.

  • Two wells were drilled at the facilities of Rospan-International LLC. The equipment and services rendered by “BURINTEKH”, Ltd ensured acceptable quality, the work was carried out on time.

  • At the facilities of OAO NK Rosneft were performed isolated core recovery operations. The work was completed on time and with high quality.

  • Feedback from Irkutsk subsidiary RN-Burenie LLC on coring: 386 m were drilled with coring, core recovery was 100%. Coring equipment produced by “BURINTEKH”, Ltd can be used in the future.

  • Feedback from BSK GRAND LLC on coring at an exploration well: 111 m were drilled with coring, core recovery was 100%. Coring equipment produced by “BURINTEKH”, Ltd can be used in the future in the construction of wells with core recovery.

  • At the facilities of Ufa subsidiary "RN-Drilling", was successfully performed core recovery using the SK-195/100 core barrel. The application of the technology made it possible to increase the core recovery rate and reduce the number of round-trip operations.

  • A record result was achieved in terms of the mechanical drilling speed - 0.64 m/h (core bit 152/80 B 12121 AM.31 and core barrel SK-127/80-02).

  • At the facilities of Variogan Oil Drilling Company LLC, “BURINTEKH”, Ltd renders a range of directional and horizontal wells drilling support. The company's equipment ensures safe and trouble-free drilling of wells.

  • At the facilities of Bashneft-Drilling LLC, the engineering and technological service of “BURINTEKH”, Ltd performed coring services in a horizontal well using coring equipment of its own production. The work was done with high quality, without deviations.

  • Two wells were drilled at the facilities of Rospan-International LLC. The equipment and services provided by “BURINTEKH”, Ltd ensured acceptable quality, the work was carried out on time.

  • At the facilities of NK Rosneft, the East Siberian Branch, were performed coring services. The work was completed on time and with high quality.

  • Feedback from Irkutsk subsidiary RN-Burenie LLC on coring: 386 m were drilled with coring, core recovery was 100%. Coring equipment produced by “BURINTEKH”, Ltd can be used in the future.

  • Feedback from BSK GRAND LLC on coring at an exploration well: 111 m were drilled with coring, core recovery was 100%. Coring equipment produced by “BURINTEKH”, Ltd can be used in the future in the construction of wells with core recovery.

  • At the facilities of LLC "Rospan-International" the engineering and technological service “BURINTEKH”, Ltd performed coring services using coring equipment of its own production. The work was done with high quality, without deviations.

  • Feedback from R&D center “Nedra”: good results were obtained when drilling stratigraphic wells in the Yamalo-Nenets District. When drilling the deepest well in Russia, SG-7 at the En-Yakhinskaya area, 5 core bits 140/67 C2 and C9 were used.

  • 292. Feedback from “Surgutneftegas”: for 7 years of joint work “BURINTEKH”, Ltd has earned a reputation as a reliable business partner, providing the most favorable conditions for the supply of products.

Publications

  • Design and comparative analysis of dynamic sealing elements used in drilling tools

  • An integrated approach to the coring process is the key to success!

  • Isolated Core Recovery in Surgutneftegaz with “BURINTEKH”, Ltd Coring tools

Patents

Discuss the project

Our experts are always ready to advise you and answer your questions.