Views: 315 Author: Site Editor Publish Time: 2021-10-15 Origin: Site
PDC drill bit is much cheaper than natural diamond bits, but it is only suitable for soft to medium-hard formations. After the PDC drill bit was successfully manufactured and used in the early 1970s, it has been developed rapidly. It can be used with lower WOB and higher speed, high drill footage, and low unit footage cost. Nowadays the use of diamond polycrystalline composite sheet inlaid and welded on the scraper has also achieved good results. And today let's talk about the PDC drill bit.
Here is the content list:
PDC drill bit design philosophy.
What are the size parameters of the PDC drill bit?
How to care for the PDC drill bit?
PDC drill bit is to break the rock by cutting. The self-sharpening cutting teeth can easily cut into the formation under the action of weight on bit and move forward to shear the rock under the action of torque. Multiple PDC drill bit cutting teeth work at the same time, there are many free surfaces in the bottom of the rock, and the rock is also easy to break under the action of shearing, so the rock-breaking efficiency is high and the drilling speed is fast.
PDC drill bit manufacturers mainly supply carcass PDC drill bits, steel PDC drill bits, including four-blade, five-blade, six-blade, seven-blade, etc.
The specific dimensions are as follows: 98mm, 118mm, 149mm, 152mm, 165mm, 190mm, 200mm, 216mm, 241mm, 250mm, 269mm, 295mm, 311mm, 346mm, 393mm, 406mm, 445mm, 660mm various specifications.
According to stratum lithology data, hydraulic power, and drilling parameters, select the appropriate type of drill bit.
(1)Select the corresponding nozzle according to the hydraulic parameters, and the size of the nozzle hole should not be too large to avoid erosion of the flow channel.
(2)Before the PDC drill bit goes down the well, check whether the size and model of the drill bit meet the requirements for use, whether the nozzle is installed properly, whether the size is correct, and whether the drill bit link thread specification matches the joint.
(3)The PDC drill bit should go down the well by the prescribed downhole operating procedures. After the drill bit is in contact with the bottom of the well, it must be gently pressed and turned slowly (weight on bit 10-20KN, rotation speed 60r/min) for 30 minutes. Drilling as large as normal WOB.
(4)During the drilling process, the operation should be stable, and the drill should be sent evenly to avoid sudden drilling.
(5)The storage and transportation of the drill bit should be placed in a wooden box and a packaging box of soft materials to avoid damage.
(6)The PDC drill bit should be stored indoors at 10~30℃, keep dry, ventilated, and prevent the sun and rain. Stored under this condition, the shelf life is five years.
PDC drill bit is much cheaper than natural diamond bits, but it is only suitable for soft to medium-hard formations. Hejian Hengji Bit Manufacture Co., Ltd. is committed to providing high-quality PDC drill bit all year round, with a complete assembly line and strict quality inspection department. We believe that our PDC drill bit products will be your best choice.