BoreHole Drilling Knowledge

In order to share our drilling knowledge to people who are interested in borehole dirlling. Here are introduction and application cases regarding water well drilling, geotechnical drilling, foundation drilling and minning exploration drilling. It also introduces the drilling method of rotary drilling, DTH(Down The Hole) Drilling and Top Hammer Drilling. The basic knowledge of drilling tools and rock are demonstrated as well.

We hope this kind of drilling knowledge could be helpful for our customers, friends and peers working in borehole drilling area.

Drilling Methods There are four different drilling methods to select from: − Rotary wearing − Rotary cutting − Rotary crushing − Top hammer percussive − Down the hole percussive Rotary wearing − Rotary wearing method’s application is normally for sampling for geotechnical exploration. −  Drill bit is made of a couple of 3-edges, 3-edges consist outer edge, middle edge and internal edge. Every edge only take one […]

General In chapter DTH Drilling Care & Maintenance – Part One, we introduced following topics: A balanced system Correct drilling parameters Most common causes of product failures Corrosion Fatigue Galling In this chapter, the discussion will be continued and following items will be explained: Lubrication Hammer disassembly Drill pipes Lubrication Correct lubrication during DTH drilling is extremely important Inadequate lubrication is a major cause of hammer wear and failure Excessive lubrication slows down the […]

General Due to there are a lot of knowledge on care & maintenance, the whole content is divided into two parts- DTH Drilling Care & Maintenance – Part One and DTH Drilling Care & Maintenance – Part Two Content A balanced system, please read basic DTH and Top Hammer drilling knowledge Correct drilling parameters Most common causes of product failures Corrosion […]

Rock Drillability

January 15, 2018

In last article, the rock property was introduced, here we will give the introduction of rock drillability. Rock Mechanical Classification Rock Properties that have an overall effect on the drillability are as following: Hardness Abrasiveness Texture Structure Breaking characteristics Harness Mohs’ scale and VHN comparison Uniaxial Compressive Strength(UCS) Specimen inserted in the testing machine between […]

Rock Properties

January 8, 2018

General In order to know the variable rock drillability and select the most suitable drilling rig to get the best drilling efficiency. Firstly, we have to be friend with rock that KNOW THEM. This course will introduce the basic knowledge of rock classification based on origin, the difference of rock properties and their effects on drilling. The methods of testing […]

Well Drilling Method

December 29, 2017

Well Drilling including geothermal and water is often the least understood. This article provides the basics of equipment and methods used for drilling and completion of geothermal and water wells. Due to cable tool is very old and less efficient way of drilling, it would be talked about here. Rotary and DTH drilling will be focused. […]

Among all the drilling method, Down The Hole(DTH) drilling is being used more and more widely and has very high efficiency for some cases. Here, we will introduce the specific application for DTH drilling as most import part of whole basic drilling knowledge. Mining                       […]

The reason customer want to drill the hole is that drill and blast is the most efficient and economic way to break rock instead of excavating it. Blast hole drilling equipment Handheld rock drills Top hammer drills  pneumatic hydraulic Down-The-Hole drills Rotary drills Rotary cutting Rotary crushing Rotary wearing               […]