What is core orientation?

Core orientation is the process by which the original in situ position or orientation of a core cylinder is determined. Typically, a mark, groove, or line is placed on the surface of the core and the in situ azimuth of the marking is determined with respect to geographic north.

What is drill core orientation?

Similar to a compass, core orientation points the way and facilitates where to plan and drill the next hole. The data produced from this process makes core orientation indispensable. After a drill run is completed, and the core samples come up, drillers are trained to work closely with a geologist to mark the core.

How to measure oriented core?

The first is to set up the core in a core frame (often called a “rocket launcher”) so that it lies in the same orientation as it did when it was in the ground; the structures within the core are then measured using a geologists’ compass – just as a structure exposed in a surface outcrop would be measured.

How to orientate drill core?

Drill Core Orientation in Rudnik

1. The drill bit must be on the bottom of the hole.
2. The spear tip must be sharp.
3. The tip must be firmly screwed into the spear to prevent it and the spear from bending.
4. The spear should be lowered so that it produces a single punch mark.

How does a core drill work?

A core drill can penetrate various surface types. It can cut cement, wood, rocks, and ice. It pushes through the surface with a twisting motion to create the hole. A different drill bit needs to be installed for each surface to allow for the best performance.

How do you measure alpha and beta angles?

Structural features, such as fractures, veins, and foliation, can be measured relative to the orientation line by measuring the so‐called alpha and beta angles. The alpha angle represents the “sharpness” of a feature, where 0° follows the drill core lengthwise and 90° is perpendicular to the drill core axis.

What is the purpose of a core drill?

The primary purpose of a core drilling is to obtain an undisturbed, intact sample representative of the in situ material. Coring is the primary method of obtaining samples of the soft rock and the cemented soil that are encountered in many areas of the world.

Why is core cutting done?

Core cutting is done to make provisional holes for the purposes of electrical wiring, plumbing, firefighting systems, rainwater outlets, heating, air-conditioning, and ventilation installations.

What is alpha and beta angle?

Purpose: Alpha and beta angles are commonly used radiographic measures to assess the sphericity of the proximal femur and distance between the pathologic head-neck junction and the acetabular rim, respectively.

What is a Kenometer?

Kenometers are a core orientation instrument used for the measurement of alpha and beta angles in core samples. Designed to save you time in obtaining core readings and analysis while still providing you with accurate results.

Do I need a core drill?

The core drill is the drill bit to use when you need to cut a large diameter hole through a solid brick or block wall. This is often required when needing to run cables, waste pipes and soil pipes and also install extraction fans.

How is core cutting done?

Core cutting in concrete is a method used for creating openings for pipes, wires, ventilating or air conditioning vents to fit through. Core drilling is basically another way of saying the cutter is making precise, circular holes.

How is the orientation of a core determined?

Core orientation. Core orientation is the process by which the original in situ position or orientation of a core cylinder is determined. Typically, a mark, groove, or line is placed on the surface of the core and the in situ azimuth of the marking is determined with respect to geographic north.

Where do you put the orientation mark on a drill core?

Although the mark should be made on the end of the core it is common for drillers to put the orientation mark on the outside of the core, which is then removed when the core is slid out of the barrel. Significant errors are induced when the drillers then attempt to determine where the mark was.

What is the role of core orientation in geochemistry?

Core orientation provides information on system geometry, potential plunge components, and the orientation of potential faults that could offset mineralization. But most of all, it provides the context for other data sets which allow for a better interpretation of geochemistry, mineralogy, short wave infra-red (SWIR) and geophysical data.

How is the orientation of a rock used?

Cores are oriented to facilitate measurement of directional properties in the rock. Most routinely, orientation is used to measure large scale features such as bedding, cross-bedding, fractures, flow textures, and stylolites. In recent years, oriented core has been used to establish the directions of downhole stress…