|
CN111911496A
|
|
Welded connection structure
|
|
CN111911077A
|
|
Drilling device with alarming function
|
|
CN111911138A
|
|
Dynamic well deviation measuring method, measuring nipple and drilling tool combination
|
|
CN111911134A
|
|
Near-bit geological guiding system
|
|
CN111636815A
|
|
Downhole power drilling tool with unfreezing device
|
|
CN111502551A
|
|
Matrix and wing mixed drill bit and preparation method thereof
|
|
CN110630623A
|
|
Screw drill transmission shaft assembly
|
|
CN110439471A
|
|
A kind of cutting depth self-regulating mechanism and drill bit
|
|
CN109681125A
|
|
A kind of indent ridges diamond compact
|
|
CN109538127A
|
|
A kind of ansa shape cutting tooth
|
|
CN109530680A
|
|
The composite polycrystal-diamond and preparation method thereof of thermostable type high abrasion
|
|
CN109530679A
|
|
The composite polycrystal-diamond and preparation method thereof of thermostable type high impact-resistant
|
|
CN109535511A
|
|
A kind of heat conductive rubber material and preparation method thereof for drilling tool
|
|
CN109434116A
|
|
A kind of drilling tool PTA resurfacing welding material and preparation method thereof
|
|
CN108661565A
|
|
A kind of more ridge diamond compacts
|
|
CN108487865A
|
|
A kind of ansa shape cutting tooth
|
