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

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

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

Longer-than-seam-height drill development program

Electromagnetic technique for locating boreholes


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