Abstract The Gaoshangpu block of Jidong Oilfield is a hot for increasing production and storage in Oilfield. High-quality efficient drilling completion can shorten the operation time have huge economic social benefits. Aiming at problems large well depth, complex geological conditions, poor stratum drillability, low machinery efficiency, long cycle Oilfield, this paper optimizes its drill bits,...

The main task of drilling the formation by the bit is done via scraping, crushing and grinding. Discharging the fluid from the bit nozzles is done with high pressure which assists to break the rocks. Different parameters affect the bit selection and design for each drilling formation, but the most important one is drillability that depends on hardness of the formation. In this paper, the design...

In rock drilling, bit wear is a major factor in determining bit life, the cost of drilling and may significantly influence the drilling method selected for given rock type. Effective control of bit wear can yield significant cost savings. Prediction of cuttability or drillability requires an understanding of the cutting action and the mode of wear and their interaction with the rock propertiesW...

In the present research, two real-time rock strength determination models based on drilling parameters were studied. Firstly, a discrete element software named Particle Flow Code in 2 Dimensions (PFC 2D ) was used to analyze applicability of drillability index and specific energy, which graded p...

Abstract Grouting reinforcement is an effective method for controlling fractured rock in the deeply buried roadways of coal mines. However, quantitatively evaluating strength grouted masses remains a challenge. The design grouting primarily based on empirical knowledge. Consequently, this study proposes real-time in-situ quality using measure while drilling (MWD) roofbolter. Initially, we valid...