Influence factors of drilling pressure
Influence factors of drilling pressure
rock properties
the smaller drilling pressure should be used in soft to medium soft formations. The drilling pressure should be increased properly in complete, medium hard and hard formations. In broken, cracked and mixed formation, the drilling pressure should be reduce properly accordingly to cracking level of the formations
bit type
greater drilling pressure can be adopted for the bits which have big diameter, thick wall and soft matrix. The bits with small diameter, thin wall and hard matrix, the drilling pressure should be smaller. The drilling pressure for surface set core bit should be higher than impregnated core bit. In order to make the diamonds on surface set core bit to drill into the rock and cause its brokenness.
diamond quality, diamond quantity, diamond size
drilling pressure should be giger when diamond quality is good, quality is big and the grain size is large; on the contrary, small drilling pressure should be adopted when the large-size but fewer diamond should be lower than the one on the bits which are with small-sized but more diamonds
cut area of the rock
the cut area of the rock depends on the bit diameter, wall thickness and waterway quantities. The larger the coring area, the higher, the drilling pressure. Conversely, the drilling pressure should be lower.
Latest News
Contact Us
Name: Perry
Tel: 0086-731-84077805
Fax: 0086-731-84072772
Mobile: 0086 13808464920
E-mail: [email protected]
QQ: 2522716948
WeChat: neptune1124
Whatsapp: 0086 13808464920
Add: 159# Li Xiang East Road, Changsha, Hunan, China. Post Code 410100