Browse TRAIL Inventories

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


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