New Technology in Diamond Drill Bits Improves Performance in Variable Formations

2000 ◽  
Author(s):  
Tim Beaton ◽  
Keith Johnson
Keyword(s):  
New Technology ◽  
Diamond Drill ◽  
Drill Bits

Low-load diamond drill bits for subglacial bedrock sampling

2014 ◽  
Vol 55 (68) ◽  
pp. 124-130 ◽  
Author(s):  
Pinlu Cao ◽  
Cheng Yang ◽  
Zhichuan Zheng ◽  
Rusheng Wang ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Diamond Drill ◽  
Drill Bits ◽  
Low Load

Tutorial: A Century of Sidewall Coring Evolution and Challenges, From Shallow Land to Deep Water

2021 ◽  
Vol 62 (3) ◽  
pp. 230-243
Author(s):  
Charlie Jackson ◽  
Keyword(s):  
Deep Water ◽  
High Power ◽  
New Technology ◽  
Core Recovery ◽  
Deep Wells ◽  
Drill Bits ◽  
Unique Method ◽  
Diameter Core ◽  
Tools And Techniques ◽  
Downhole Monitoring

Due to the high cost of conventional coring operations, rotary sidewall coring has become increasingly important, particularly for deepwater operations. The rig costs, operational challenges, and amount of time involved to core wells below 30,000 ft are considerable, even for wireline operations. As wells get deeper, formation pressures will exceed 30,000 psi, and differential pressures can exceed 10,000 psi, which will eclipse the capabilities of traditional rotary coring tools. New technology has been introduced to enhance the recovery of rotary sidewall cores to improve operations and capabilities on these challenging wells that will be the primary subject of this paper. This new technology can also enhance coring operations and reliability for land and other offshore operations, in addition to deep water. New improvements and challenges include: * Reliable 1.5-in.-diameter core samples, with a 35,000-psi-rated tool * New high-powered coring tools with enhanced energy to address cutting Lower Tertiary wellcemented formations (Wilcox, Lower Miocene, etc.) * Higher torque and horsepower at the bit to enhance cutting and prevent stalling when coring * High-powered surface systems along with highstrength and high-power wireline cables * Upgrades to address high temperatures, highdifferential pressures, high-mud viscosity, large (24 in.) boreholes, and improved reliability * New drill bits and catcher rings to use a high-power system and operate in harsh coring environments * New cutting, retrieval, and core handling advancements for reliability in hard, consolidated formations * Combinability upgrades to reduce wireline trips and reduce rig costs for coring * Dual-coring tools with the ability to have different catcher rings and bits downhole simultaneously on a single run, along with tool redundancy downhole for improved reliability * Combination of rotary coring and formation sampling operations to obtain formation pressures, fluid samples, and rotary sidewall cores on a single run * Downhole monitoring of the coring operation, which includes drilling functions like torque, bit force, penetration rate, core bit penetration, and recovered core length, along with tool orientation * Core recovery information to enable 100% core verification downhole, so extra cores are not cut unnecessarily during the job, with individual core plugs measured and verified downhole * A unique method to seal the cores in a pressurecompensated coring tube downhole to capture all the formation fluids in the rock in downhole conditions * Complete rotary coring downhole operations can be monitored remotely for offsite interaction during the coring operation Besides reviewing historical coring tools and techniques, new technology is also discussed in more detail. The new technology starts with the introduction of the 1.5-in.-diameter rotary sidewall coring tools for deep water over a decade ago. Many applications and technologies are presented to show their effectiveness for deepwater operations. The successful examples include acquiring 1.5-in. cores in large boreholes, hard formations, deep wells, high-differential pressures, and extreme hydrostatic pressure. There are also examples of new technology available for future operations, including dual coring, combination coring, and sealed pressurized coring.

Research on Embedding Strength of Diamond

2011 ◽  
Vol 480-481 ◽  
pp. 560-567
Author(s):  
Jun De Yang ◽  
Zhong Ping Luo ◽  
Fan Lu ◽  
Yuan Wang
Keyword(s):  
Tungsten Carbide ◽  
Diamond Drill ◽  
Diamond Drilling ◽  
Drill Bits ◽  
Matrix Surface ◽  
The Matrix ◽  
Diamond Saw ◽  
The Cost ◽  
Diamond Saw Blades ◽  
Drilling Bit

It is stated that Diamond saw blades requires high embedding strength of the diamond, while diamond drill bits do not. It is necessary to improve the embedding strength of diamond in diamond saw blades, rather than in the diamond drilling bits. It is recommended to count the number of diamond particles on the matrix surface and get the embedding strength of diamond by calculation. Another recommendation is to use the compound powder of cobalt and tungsten carbide for pelletizing in order to improve the embedding strength of diamond and lower the cost of matrix. There are people studying how to raise embedding strength of diamond, for both diamond saw blades and diamond drilling bit. However, the requirements for embedding strength of diamond saw blades and diamond drilling bit are different. The following parts include the analysis for this problem.

Microstructure and processing performance of brazed diamond drill bits with Ni–Cr + Cu–Ce composite solder

2019 ◽  
Vol 93 ◽  
pp. 216-223 ◽  
Author(s):  
Duanzhi Duan ◽  
Lin Sun ◽  
Xudong Fang ◽  
Qijing Lin ◽  
Changsheng Li ◽  
...  
Keyword(s):  
Composite Solder ◽  
Diamond Drill ◽  
Drill Bits

scholarly journals Design of Diamond Drill Bits with Primary and Secondary Abrasives

2019 ◽  
Vol 43 (3) ◽  
pp. 183-188
Author(s):  
Richeng Zhong ◽  
Zhenbin Peng ◽  
Haidong Jiang
Keyword(s):  
Diamond Drill ◽  
Drill Bits

Implementation of the rock thermal cyclic weakening in the diamond drill bits with an elastic console

2018 ◽  
pp. 23-30
Author(s):  
V. Gankevich ◽  
◽  
T. Moskalova ◽  
O. Lyvak ◽  
V. Kravets ◽  
...  
Keyword(s):  
Diamond Drill ◽  
Drill Bits

Research on the Design of Diamond Size in Diamond Drill Bits and Diamond Saw Blades

2011 ◽  
Vol 148-149 ◽  
pp. 1548-1553
Author(s):  
Jun De Yang ◽  
Wen Li Lin ◽  
Yuan Wang
Keyword(s):  
Rock Breaking ◽  
Actual Condition ◽  
Cutting Depth ◽  
Diamond Cutting ◽  
Diamond Drill ◽  
Drill Bits ◽  
Fine Diamond ◽  
Diamond Saw ◽  
The Difference ◽  
Diamond Saw Blades

In this paper, it is assumed that diamond’s cross-section is hexagonal, which is similar to the actual condition. At first the diamond cutting depth of diamond drill bits and diamond saw blades has been calculated and analyzed. A variety of diamond size and diamond exposure difference has also been calculated and analyzed. It is shown that the cutting depth of single diamond was generally below 0.02mm and the difference on diamond exposure between coarse and fine diamond must be less than diamond cutting depth to achieve efficient rock breaking. Some diamond size design methods are acquired via the calculations and analysis.

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