Professional paper

REDUCTION OF COST AND TIME CONSUMPTION IN WELL-CONSTRUCTION

Mladen Zelenika
Božo Soldo

Abstract

A Contractor usually utilizes the available drilling equipment when constructing just one single well. Drilling cost and time consumption in constructing the well MB-1, using the percussion method, and the well MB-2, using the conventional rotary drilling method, call for a separate analysis in order to justify the investment cost for the acquisition of additional equipment for a single well only. The wells, located in a karst vrtača close to an estavelle near Tomislavgrad, with a diameter of 500 mm and approximately 80 m deep, have been accomplished with a low rate of penetration using the conventional Cable tool and resp. Rotary Drilling Method. In this paper results of analyses for the given circumstances are shown: both the efficiency and cost of the mentioned drilling methods performed by the crews of »Geotehnika d.d.« Zagreb, as well as the justifiability of investments in new equipment are evaluated.

Keywords

drilling bit; drilling method; well; screen; casing; design of well; well diameter

Hrčak ID:

13475

URI

https://hrcak.srce.hr/13475

Publication date:

4.12.1998.

Article data in other languages: croatian

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