Microwave PDC Drill Bit

2013 ◽  
Vol 774-776 ◽  
pp. 1414-1417
Author(s):  
Zong Gang Wang ◽  
Zhen Wei ◽  
Lai Ju Han
Keyword(s):  
Mechanical Energy ◽  
Rock Breaking ◽  
Drill Bit ◽  
Rotary Drilling ◽  
Pdc Bit ◽  
Wear And Tear ◽  
Drilling Cost ◽  
Combined Action ◽  
Drilling System ◽  
Microwave Heat

On the rotary drilling system, the technologies for fracturing and cutting hard rock are mainly mechanical rock breaking methods by use of improving bottomhole water horse power and bit energy, and the working life and rock breaking efficiency have much room for improvement. Microwave crag broken is a thermal assisted rock breaking method which could melt rocks. Microwave assisted rock breaking method will not bring new impact, wear and tear, instead, the microwave pretreatment on the rock reduces the difficulty of breaking rock and prolongs the service life of the drill bit. Under the combined action of microwave heat and mechanical energy of PDC bit, the rock breaking efficiency is improved greatly, and the drilling cost is reduced significantly.

The Development of the Microwave Assisted Rock Breaking Device

2014 ◽  
Vol 900 ◽  
pp. 627-630 ◽  
Author(s):  
Guang Tong Feng ◽  
Zong Gang Wang ◽  
Zhen Wei
Keyword(s):  
Service Life ◽  
Hot Spot ◽  
Near Field ◽  
Rock Breaking ◽  
Field Energy ◽  
Drill Bit ◽  
Microwave Generator ◽  
Impact Wear ◽  
Microwave Assisted ◽  
Wear And Tear

Microwave crag broken is a thermal assisted rock breaking method which could melt rocks. Microwave assisted rock breaking method will not bring new impact, wear and tear, instead, the microwave pretreatment on the rock reduces the difficulty of breaking rock and prolongs the service life of the drill bit. This microwave generator accumulates the microwave near the hot spot to soften and melt the rock through generating and transmitting the microwave. And we had experimented with the microwave generator to penetrate the wood, and weaken the strength of the rock. And the experiment proved the scheme of the microwave assisted rock breaking through microwave near field energy and the thermal runaway effect is feasible.

scholarly journals Unit Experimental Study on Impact Crushing Rock of the Microcoring PDC Bit

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Yingxin Yang ◽  
Dongdong Song ◽  
Kuilin Huang ◽  
Haitao Ren ◽  
Jian Zhou
Keyword(s):  
Experimental Study ◽  
Static Pressure ◽  
Penetration Rate ◽  
Central Area ◽  
Rock Breaking ◽  
Drill Bit ◽  
Pdc Bit ◽  
Core Column ◽  
Impact Crushing ◽  
Breaking Work

In light of the situation of sliced or powdery cuttings produced by conventional PDC bit, it is found that they are not convenient for geological logging and stratification. The unit crushing experiment which contains two breaking forms (static-pressure breaking and impact) is conducted on core columns of sandstone, limestone, and granite. This experimental study showed the following: The breaking work ratio of the three core column types is much less than that of the flat rock. The height of the core column has little effect on the bit penetration rate, while core column diameter has greater effect on the bit penetration rate. The experimental results further indicate that a core column has been generated in the central area of the drill bit, which is beneficial to the volume breaking of the rock and can improve the rock-breaking efficiency of the drill bit. The microcoring bit is suitable for raising speed in soft, medium, and hard formations and is helpful for geological logging.

Study on the PDC Bit Optimization Design Based on Rotary Steering Drilling

2013 ◽  
Vol 416-417 ◽  
pp. 1874-1878
Author(s):  
Guang Ming Han
Keyword(s):  
Optimization Design ◽  
Parameter Adjustment ◽  
Profile Shape ◽  
Drilling Parameters ◽  
Pdc Bit ◽  
Drilling Parameter ◽  
Drilling System ◽  
Gauge Structure ◽  
Design Result

According to a series of characteristics produced from the side cutting in the rotary steering drilling system, PDC bit is improved from the profile shape, cutting structure, and gauge structure. Also, suggestions are proposed according to the drilling parameters of operation. The study result shows that the requirements of the rotary steering drilling system can be fulfilled by PDC bit design result and drilling parameter adjustment.

Kinematic and bottom-hole pattern analysis of a composite drill bit of cross-scraping

2016 ◽  
Vol 231 (17) ◽  
pp. 3104-3117 ◽  
Author(s):  
Yingxin Yang ◽  
Chunliang Zhang ◽  
Lian Chen ◽  
Yong Liu
Keyword(s):  
Polycrystalline Diamond ◽  
Rock Breaking ◽  
Speed Ratio ◽  
Drill Bit ◽  
The Novel ◽  
Analysis Model ◽  
Fracture Failure ◽  
Bottom Hole ◽  
Geometric Relationship ◽  
Polycrystalline Diamond Compact

For improving the drilling efficiency of polycrystalline diamond compact drill bit, a novel polycrystalline diamond compact drill bit is presented with a new rock-breaking method named as cross-scraping. In the novel polycrystalline diamond compact drill bit which is referred to as a composite drill bit, polycrystalline diamond compact cutters are mounted on rotary wheels as major cutting elements, and as a result, mesh-like scraping tracks are formed in the outer radial area of the bottom-hole. Rock-breaking method of the composite drill bit causes both shearing and fracture failure of the bottom-hole rock, which will greatly increase the rock-breaking efficiency and will prolong the bit service life. By analyzing the complex motion of cutters on the composite drill bit, velocity and acceleration models of the cutters, as well as wheel/bit speed ratio model of the bit are established in accordance with the geometric relationship between cutters and bit body in a compound coordinate system. In simulation examples, motion tracks, velocity and acceleration features of the cutter and especially the bottom-hole pattern are analyzed. Further, indoor experiments are conducted to test the mesh-like bottom-hole pattern and rock-breaking features, which have proved the accuracy of the analysis model of the composite drill bit.

scholarly journals Measurement of bit-rock interface temperature and wear rate of the tungsten carbide drill bit during rotary drilling

Friction ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 1073-1082 ◽  
Author(s):  
Vijay Kumar Shankar ◽  
Bijay Mihir Kunar ◽  
Chivukula Suryanarayana Murthy ◽  
M. R. Ramesh
Keyword(s):  
Wear Rate ◽  
Tungsten Carbide ◽  
Interface Temperature ◽  
Drill Bit ◽  
Rotary Drilling ◽  
Rock Interface

scholarly journals Full-scale experimental investigation of the performance of a jet-assisted rotary drilling system in crystalline rock

2019 ◽  
Vol 115 ◽  
pp. 87-98 ◽  
Author(s):  
Thomas Stoxreiter ◽  
Gary Portwood ◽  
Laurent Gerbaud ◽  
Olivier Seibel ◽  
Stefan Essl ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Crystalline Rock ◽  
Full Scale ◽  
Rotary Drilling ◽  
Drilling System
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