Exhibit Profile：
1．Rotary steering drilling system；2．BH-VDT vertical drilling system；3．BH-series ROP accelerating tools；4．Selective multi-stage fracturing and controlled production technology；5．BH-series cementing and completion tools；6．BH-LOT visual stimulating geo-steering mud logging technology；7．CBM drilling and completion technology；8．BH-FDD lost circulation controlling technology；9．BH-WGX solid free workover fluid；10．BH-HTC high temperature high density cement slurry.
1．Rotary steering drilling system；2．BH-VDT vertical drilling system；3．BH-series ROP accelerating tools；4．Selective multi-stage fracturing and controlled production technology；5．BH-series cementing and completion tools；6．BH-LOT visual stimulating geo-steering mud logging technology；7．CBM drilling and completion technology；8．BH-FDD lost circulation controlling technology；9．BH-WGX solid free workover fluid；10．BH-HTC high temperature high density cement slurry.
Website：http://www.bhzt.cnpc