Chapter 1 Downhole Equipment 1
1.1 Downhole Separator Produces Less Water and More Oil 1
1.2 Maximizing Production with Permanent Downhole Sensors 10
1.3 A New Downhole Tool for ECD Reduction 19
1.4 New Performance Motors Set New Benchmarks in Drilling Performance 31
Chapter 2 Drilling Techniques 41
2.1 Drillstring Technology for World-Class Extended-Reach Drilling 41
2.2 Torsional Resonance of Drill Collars With PDC Bits in Hard Rock 51
2.3 Drilling with Casing：The Mexican Technique Uses the Casing as a Drillpipe 62
Chapter 3 Drilling Materials 77
3.1 New Applications for Enzymes in Oil And Gas Production 77
3.2 Experimental Study on Cuttings Transport with Foam under Simulated Horizontal Downhole Conditions 89
3.3 Fibers in Cement Form Network to Cure Lost Circulation 97
3.4 A Novel Method to Evaluate the Formation-Damage Potential of Drilling Fluids 106
Chinese Translation and Key to Exercises 118
References 170