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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

Volume: 23 (1939)

Issue: 12. (December)

First Page: 1820

Last Page: 1829

Title: Drilling-Time Data in Rotary Practice: Part I. Interpretation of Data

Author(s): T. C. Hiestand (2)

Abstract:

Use of drilling time is not new, but the full use of the method has not been employed until recently. The controlled drilling possible with modern rotary rigs, together with the use of the geolograph, makes drilling-time records dependable to interpret accurate depths of porous formations on the rig floor. This in turn allows the geologists on drilling wells to recommend proper testing of all zones where oil and gas occurs, as penetrated. Drilling-time data assist in getting fuller recovery of cores, in avoidance of undue loss of time running on dull bits, and permit the correction for sample lag so that the log of the well checks with electrical and geothermal charts. Six typical well cases are discussed.

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