Turbodrilling System and Diamond-Impregnated Bit Saved Three Trips in a Hard Carbonate Reservoir

Abstract

In a learning process of using turbodrilling and hybrid bits in Field A, a technical feasibility study was performed by the operator and service companies involved to analyze the viability of executing this new well whilst creating new products to optimize drilling performance in the complex Cretaceous formations. The study had two basic objectives: increasing the rate of penetration (ROP) and reducing the numbers of runs to complete the section. The Well-3 was planned to drill through three high-compressive-strength, high-temperature Cretaceous formations composed of 30% chert using a 6⅝-in steerable turbodrill. To meet the drilling goals, a newly designed diamond-impregnated bit was used to achieve directional efficiency and to reduce shock and vibrations typically seen in this interval. The turbodrilling system completed the interval in a single run, achieving both directional and durability objectives by drilling 287 m in 94 hours at an average ROP of 3.05 m/h, overcoming the drilling challenges and high chert content. This paper will describe the methodology and engineering approach highlighting the most-critical parts of the design, execution, and evaluation phases that were key factors in achieving the objectives and minimizing all the associated risks.

Study of the Critical Speed of Ultra-High-Speed Diamond Drilling Technology in Marble

“…The impregnated diamond bit is the most commonly used drill bit type in deep hard rock geological drilling, meeting the drilling needs of highly abrasive formations with its unique self-sharpening process and rock-breaking method [7][8][9][10][11][12][13]. Its rock-breaking mechanism is similar to that of a grinding wheel working on a workpiece.…”

Investigation of Filling Phase Percentages on the Performance of WC-Cu Based Hot-Pressing Diamond Bit Matrices

“…Among these, the melting temperature of Cu and Cu-alloys are approximately 900 • C, while Co, Ni, Fe and Mn powders are around 1200-1500 • C. Thus, the formers are usually used as filling phases, and the latters are usually used as bonding phases. Additionally, with the popularization of all-hydraulic drill rig in geological exploration, and the increasing well depth of oil and gas drilling, WC has been altered from the conventional particle reinforced material to a primary content in hot pressed impregnated diamond bit [24][25][26].…”