Site test feedback of DTH bit in Jiangkou mountain river project, Putian, Fujian

Test site

Jiangkou, Putian, Fujian

Engineering project

Quarry

Host model

Jinke 590

Main engine speed

Type of air compressor

Life force 780RH

wind pressure

21kg

Impactor type

Day and 55A

Drill diameter

Φ138

Borehole angle

90°

Borehole depth

15 m / hole

Rock type

Rock hardness

F12-14

Bit manufacturer

Qi Deli, Black King Kong, Tian He

Alloy tooth manufacturer

New sharp、Zhuzhou 601

Alloy

XR06A、YK05

Tooth profile

Parabolic tooth Φ18、Φ15、Φ14

Operator

Master Yang  18824739098

Bit number

Stratum

Single pole drilling time

Footage

Remarks

QIDELI -1

F12-14

4-4.5min

365m

23 hole X15m+10 hole X2m=365m，Gauge buttonΦ18、Front buttonΦ15、Top button Φ14

Changsha Tian He

F12-14

about 350-400m

Gauge button Φ18 Front button Φ16 （Conical tooth）

Failure form of drill bit

1. By observing the failure bit, it is judged that the failure modes of the two manufacturers are basically the same. Both of them are serious wear and tear of the reservoir and late edge tooth failure.

2. the odd teeth are the same as those of Tian Ho's DTH Drill bits, and the middle teeth are different.

3. Chidley DTH bit did not break teeth or reservoir in the early and middle period of operation, and the final footage meter was approved by the operator.

User feedback

                                 Signature:       Huang Yongkang      April 22, 2016