Browse TRAIL Inventories

Drilling and broaching in slate quarries

Relation of dust concentration to depth of hole during wet drilling

Some information from an investigation on methods of confining cardox blasting devices in boreholes in certain coal mines

A method for surveying drill holes by oriented drill rods

Ground-resistance measurements of drill-hole casings

Diamond-drilling blast holes, eastern Magnetite Mine A

Diamond drilling and diamond bit investigation

Diamond drilling and diamond bit investigation.

Diamond drilling of potash reserves in Eddy County, N.Mex

Blast-hole diamond drilling in California mines

Grouting diamond-drill holes at the Christmas mine, Gila County, Ariz.,with notes on the setting properties of cements and the use of liquid carbon dioxide as a pressuring agent in grouting

Cable-tool coring with oil-base mud in Appalachian oilfields

Exploratory drilling practices and costs at western uranium deposits

Deformation of a borehole in rock

Drillability studies :diamond drilling

The stress field within a core stub in a borehole

Accuracy in estimating metal content and tonnage of an ore body from diamond-drill-hole data

Design of drill-hole grid spacings for evaluating low-grade copper deposits

Drillability studies :statistical regression analysis of diamond drilling

Inelastic deformation of rock under a hemispherical drill bit

Drillability studies :impregnated diamond bits

Calculation of the average ground stress components from measurements of the diametral deformation of a drill hole

Explosive-expansion center-hole anchor

Horizontal boring technology :a state-of-the-art study,

Two borehole photograph goniometers

Drillability studies-laboratory percussive drilling

Energetics of percussive drills-longitudinal strain energy

Wellbore enlargement test in a gas-storage well

Prediction of penetration rate for percussive drilling

Effect of organic additives on impregnated diamond drilling

Technique of measuring initial deformation around an opening :analysis of two raise-bore tests

Percussive drilling with independent rotation

Effect of a surface borehole on longwall gob degasification(Pocahontas No. 3 Coalbed)

Determination of attitudes of joints surveyed with a borescope in inclined boreholes

Improvements in the three-component borehole deformation gage and overcoring techniques

Cutting experiments using a rotating water jet in a borehole

Rotary drilling holes in coalbeds for degasification

Influence of surface-active chemicals on drilling and fracturing rock

Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.

Transducer preparation gage assembly of the Bureau of Mines three-component borehole deformation gage

Longer-than-seam-height drill development program

Electromagnetic technique for locating boreholes

Least squares calculation of horizontal stress from more than three diametral deformations in vertical boreholes

Review of horizontal drilling technology for methane drainage from U.S. coalbeds

Drilling a horizontal coalbed methane drainage system from a directional surface borehole

Probability of encountering coalbed discontinuities during vertical and horizontal borehole drilling

Site-specific and regional geologic considerations for coalbed gas drainage

Control of longwall gob gas with cross-measure boreholes (upper Kittanning coalbed)

Quartz dust sources during overburden drilling at surface coal mines

Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal


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