Coring shells

In the production of coring shells, high-quality pipe billets of domestic and foreign manufacturers are used. All parts undergo strict manufacturing quality control.

The design of the shells is universal and allows one shell to be used on the rig to select both uninsulated and insulated core, thanks to the use of fiberglass core pipes and insulating fluid.

The core sampling shell is equipped with all auxiliary tools and spare parts necessary for assembly, disassembly and adjustment in a drilling environment.

As agreed with the customer, core sampling shells may be equipped with:

• bypass sub with interchangeable nozzles, allowing to limit the flow rate of flushing fluid through the projectile and burgole when coring with a hydraulic downhole motor, which requires large flow rates for operation;
• spiral centralizers, the diameter of which is selected for specific drilling conditions;
• isolating fluid "IZOCOR" produced by NPP "Burintech" with high rheological properties, adhesion, lubricating ability to prevent penetration of the filtrate of the drilling fluid into the core material.

Features:

• the increased diameter of the case and reinforced threads increase the resource and provide long trouble-free operation of the coring shell;
• tapered threads of core-receiving pipes significantly accelerate the process of assembly and disassembly of the projectile;
• the universal suspension design of the core-receiving pipe allows quick adjustment of the clearance between the burgole and the core-shoe, and, if necessary, replacing the thrust bearing of the standard series of the heavy series under drilling conditions in 10-15 minutes;
• collet core-breakers have the necessary elastic properties, thanks to a special heat treatment technology, and are equipped with a roughness tungsten carbide surfacing equal in thickness throughout the entire inner diameter, ensuring reliable core capture when it is detached from the bottom and raised to the surface;
• several versions of lever core cutters allow you to choose the overlapping cross-sectional area of the core receiving pipe, depending on the type of rock being taken for reliable core retention during lifting;
• Spiral centralizers installed on the projectile reduces vibration and axial vibration, allowing to increase the percentage of core recovery at work in the fractured, cavernous and peremyatyh rocks.

Characteristics:

* - by prior agreement, the maximum number of sections can be increased.