Waterproof pilot for water drill

Application Number: 00109171
Application Date: 2000.06.14
Publication Number: 1274629
Publication Date: 2000.11.29
Priority Information:
International: B23B45/00;B23B45/14
Applicant(s) Name: Chen Yuehui
Inventor(s) Name: Chen Yuehui
Patent Agency Code: 00000
Patent Agent:
Abstract The waterproof pilot consists of four parts, including a sealed water gathering and transportation seat, a pilot slid rod assembly, a stepped bit feeding mechanism and a fast mounting and fixing mechanism. The gate type water gathering and transportation seat has a water gathering and transportation cavity inside the drilling diamond pipe and the cavity has sewage exhaust pipe in the bottom, winged sealing spacer and fast mounting and fixing mechanism. The pilot slid rod has sleeved carriages to support water driller and the bit feeding mechanism is mounted between two carriages for stepped bit feeding and reverse withdrawing of bit. The waterproof pilot can raise drilling efficiency and prolong the service life of the drilling pipe.