Part l.Brief introduction
Hejian Hengji Bit Manufacture Co.,Ltd is located in Hejian,Hebei province.and is Chinese bit industry's emerging enterprises.The company is mainly engaged in the development of various series of bits, development, production and sales.
Hengji company has developed and mass-produced products 3 inches to 26 inches series steel tooth bit and tricone bit, various types of PDC bits, core bit and production and processing assembly 0.6 m to 3 m large diameter drill bits.Widely used in the oil, natural gas, hydrology, address, ore drilling engineering, product marketing the country and 20 countries and regions in the world.
Part ll.Operation Instructions on Hengji PDC Bit
1.Please select the applicable formation and parameters according to the instructions.
2.Selection of the appropriate nozzle according to the hydraulic parameters of the nozzle hole size differential is not too much to prevent erosion of the stream channel.
3.Before the bit running into the well, the user should carefully check the overall appearance and confirm that the serial number on the shank end is the same as those on the packing box and certificate.
4..The required bit operating procedures should be followed. After getting to the bottom hole, the bit must be running in slowly with lighter bit weight(WOB: 5-15KN, RPM: 60r/min) for 1/2 hour and then drilling ahead with normal WOB.
5.If abnormal damage(s) of the bit occurred, please contact the company and the packing box, inspection certificate, original performance records as well as the failure bit(with nozzles on ) should be kept for our view, or we are not responsible for it.
Part lll.Cautions
Part lll.Cautions
1.Please select the applicable formation and parameters according to the instructions.
2.Carefully check the bits appearance and to check the bits threaded end face,whether the serial number on the box and certificate.
3.Selection of WOB and RPM should be within the limits of the recommended parameters, higher WOB and RPM cannot be used simultaneously.
4.Bottom hole must be clean and bit must not be used for long section reaming.
5.Drilling process must operate smoothly, find that there is Bie jump on abnormal phenomenon, should be timely analysis and take effective measures
6.The bit should be kept indoor with dry and well ventilated conditions at 10-33℃ and kept from sunshine and rain. Stored under such conditions, quality of bit is guaranteed for 3 years.
Part 4th PDCbit model Short Form
Part 4th PDCbit model Short Form
Series Code | Series Name | Blades number Code | Cutting teeth Size Code | Contour Code | Additional features Code | |||||
F | F Series PDC drilling bit | 3 | 10 | 3/8in | 1 | short  long | 1 | Round | J | Strengthen teeth |
4 | 13 | 1/2in | 2 | 4 | D | sidetracking\orientation\level | ||||
5 | 16 | 5/8in | 3 | 7 | S | screw | ||||
6 | 19 | 3/4in | 4 | 2 | Parabola | B | Double heart | |||
FQ | FQ Series PDC Coring bit | 7 | 25 | 1in | 5 | 5 | ||||
8 | 6 | 8 | ||||||||
9 | 7 | 3 | taper | |||||||
Bit type | Main bit size(mm) | Rock coefficient | |
PDC core drill bit | Single pipe | 75/54.5 94/74 113/89 113/109 153/129 | 1-18 |
Two-pipes | 75/54.5 94/68 | ||
PDC center drill bit | Concave 3 wing bit | 60 75 94 113 133 | 1-18 |
Arc pillar | 60 75 94 113 133 | 4-18 | |
Many wing scraper | 60 75 94 113 133 133 153 173 190 215 | 1-6 | |
PDC Indexable drill bit | 153/94 153/113 190/153 190/113 | 1-18 | |
