hole deviation

[′hōl ‚dē·vē‚ā·shən]

(engineering)

The change in the course or direction that a borehole follows.

References in periodicals archive ?

Here are the most common factors in hole deviation and general fixes.

How To Reduce Drill-Hole Deviation: Good Operating Practice Is Key to Mitigating the Problem

Benefits include "less hole deviation and better drill consumables economy with automatic collaring," he said.

Underground Drilling Advances Improve Productivity, Safety While Cutting Costs: Field-proven technologies increase penetration rates and hole accuracy, thus overall improving fragmentation

Tenders are invited for Supply of Multi shot digital unit for capturing Compass-inclinometer images of Bore hole deviation survey system, with mechanical accessories.

Supply of Multi shot digital unit for capturing Compass-inclinometer images of Bore hole deviation survey system

Hole deviation was monitored by multi-shot down hole camera and a representative population probed with a gyroscopic tool for QA/QC purposes.

-Royal Resources Limited - Maiden Iron Resource at Iron Peak

In cases where a weak rock mass is present or where discontinuities in the rock are persistent, open and frequent, "unanticipated" drill hole deviation may result.

Rock mass properties and their potential impacts on trenchless projects

The LS600 rig claims to deliver more accurate core sampling, less than 1 percent hole deviation, reduced waste, and faster penetration than conventional methods.

-Boart Longyear to launch LS600 sonic rig

the difference between the nominal value and average measured value of the shaft diameters for specimens (i), and hole deviation, that is the difference between the nominal value and average measured value of the internal diameters of specimens (ii).

Validation study of an analytical model of FDM accuracy

Coprod also virtually eliminated hole deviation, and it was therefore possible to further increase hole diameter.

Better blastholes cut production costs

Furthermore, although the forces on the tool are somewhat reduced, significant mechanical force is still required, bringing back the problems of bit wear and hole deviation.

Progress in rock drilling

Hole deviation results in inefficient operations and in the worst case may create safety hazards.

Dyno Nobel's differential energy system provides blast benefits

Since the results are obtained immediately, it is possible to react to any hole deviation when positioning and directing the following holes.

Robit Technology measures borehole straightness while drilling

During the 2013 program, 29 diamond drill holes were attempted, 25 holes were completed through the Deep Kerr target, two were lost due to significant hole deviation (K-13-27 and K-13-33) and two were terminated due to weather and are available for re-entry in the future ( K-13-25D and K-13-28C).

Canada : Seabridge Gold Reports Final Results from Highly Significant Deep Kerr Discovery

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