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This pdc water well drilling bits is specially designed for complex water well drilling formations. it adopts 1308/1613 series PDC composite sheet with excellent impact toughness and steel body structure optimized by fluid mechanics. Compared with traditional cone bit, the rate of penetration (ROP) in soft to medium hard rock (f = 4-10) is increased by more than 50%, significantly shortening the drilling cycle and accepting large orders.
3-6 wings
Number of blade wings
13/16/19mm
Cutting teeth
API standard thread
Interface
The “force balance” tooth design is adopted to ensure the stability of the drill bit when working at the bottom of the well. Through the design of 15 ° back inclination angle, the impact resistance of the composite sheet is increased by 30% while ensuring the aggressiveness, which effectively responds to the impact load of the interlayer formation.
High-density thermally stable polycrystalline diamond and cemented carbide blocks are embedded in the gauge parts. The wear resistance of the gauge is 5 times of that of the common surfacing process, which ensures the regularity of the borehole and avoids the risk of sticking caused by diameter reduction, and is suitable for deep water well operation.
Optimize the nozzle angle and flow path design through CFD fluid simulation, and increase the chip removal area by 20%. When drilling into clay or shale layer with large displacement, it can effectively prevent the mud from wrapping the bit and maintain continuous and efficient cutting.
The main body is made of 42CrMo high-strength alloy steel. After integrated heat treatment process, the hardness reaches 40-45 HRC and the yield strength exceeds 900 MPa. While maintaining high strength, it has good repair, and the drill body can be used for multiple tooth replacement and re-welding.
The use of imported high silver solder with induction brazing process, welding shear strength of more than 280 MPa. Strict temperature control to prevent thermal damage of PDC composite sheet, prevent tooth drop accidents during drilling, and ensure the safety of downhole operation.
The bit performs well in mudstone, sandstone and medium-hard limestone (compressive strength <120 MPa), which is common in water well drilling. Compared to roller cone bits, the no moving parts design eliminates the risk of bearing failure and extends the footage life of a single bit by 2 times.
| Bit Size (Inch/mm) | Blade Count | Cutter Size (mm) | Connection Thread (API Reg) | Rec. WOB (kN/mm) | Rec. RPM (r/min) | Nozzle Qty |
| 3 1/2″ (89mm) | 3 / 4 | 1304 / 1308 | 2 3/8″ API Reg | 0.4 – 1.0 | 80 – 250 | 3 |
| 4 5/8″ (118mm) | 3 / 4 | 1308 | 2 7/8″ API Reg | 0.4 – 1.2 | 80 – 220 | 3 |
| 6″ (152mm) | 3 / 4 / 5 | 1308 / 1613 | 3 1/2″ API Reg | 0.5 – 1.4 | 60 – 200 | 3 / 4 |
| 7 7/8″ (200mm) | 4 / 5 | 1613 / 1913 | 4 1/2″ API Reg | 0.5 – 1.5 | 60 – 180 | 4 / 5 |
| 8 1/2″ (216mm) | 4 / 5 / 6 | 1613 / 1913 | 4 1/2″ API Reg | 0.6 – 1.6 | 60 – 160 | 4 / 5 / 6 |
| 12 1/4″ (311mm) | 5 / 6 | 1913 | 6 5/8″ API Reg | 0.6 – 1.8 | 50 – 140 | 6 / 7 |
| 17 1/2″ (445mm) | 5 / 6 / 8 | 1913 | 7 5/8″ API Reg | 0.8 – 2.0 | 40 – 120 | 7 / 9 |
Compared to traditional water well drilling tools (such as steel teeth or drag bits),pdc water well drilling bits use the principle of shear failure instead of crushing failure. In the homogeneous formation, the cutting efficiency is higher, and the required weight on bit is only 30%-50% of the cone bit, which greatly reduces the load of the drilling rig. In addition, the one-piece design eliminates the risk of bit disintegration due to bearing seal failure.
For deep water well projects above 300 meters, the long life of PDC bit greatly reduces the number of trips. The problem of increased non-production time (NPT) and waste of fuel and labor costs caused by frequent bit changes is solved.
Aiming at the common mudstone and clay layer in water well drilling, the optimized open flow channel and large water hole design, combined with high flow rate mud erosion, solved the mud bag phenomenon caused by the poor chip removal of the traditional drill bit, and kept the ROP at a high level of 20-30 m/h.
For the high abrasive sandstone layer, we use reinforced PDC composite sheet in the outer row of teeth, which is very hard and wear-resistant. It solves the problem that the tooth surface of the steel tooth drill bit needs to be ground and changed frequently within a few hours, and the life of a single drill bit can usually complete the drilling of the whole well.
Applicable to contractors undertaking agricultural irrigation wells, industrial wells and drinking water wells. The pdc water well drilling bits can help it quickly penetrate sedimentary rock formations within a limited budget and duration, improving project delivery speed and profitability.
In view of the situation that geothermal wells are often deep and complex lithology, high temperature resistance and long life drill bits are needed. Our products in the deep high temperature environment still maintain stable cutting performance, suitable for geothermal HVAC hole and deep geothermal power generation wells drilling.
It is applicable to core pilot hole drilling in mineral resources exploration. The high gauge capability of the PDC bit can ensure a smooth borehole trajectory, provide a high-quality borehole structure for subsequent rope coring or casing running operations, and reduce in-hole accidents.
For drilling consumables distributors around the world. We provide API standard certification and stable quality control. The products have extremely high cost performance and re-purchase rate. They are suitable for replacing and upgrading products of roller cone drill bits into distribution catalogs.
Carefully check whether the cutting teeth of pdc water well drilling bits are chipped, and whether the nozzle is firmly installed and free of blockage. Confirm that the drill bit thread specification matches the drill collar, and apply special thread oil to the thread to prevent galling.
Use the recommended torque values for the make-up operation. It is strictly forbidden to directly use a sledgehammer to hit the diamond composite part. Use a bit box to hold the bit to avoid damage to the gauge position.
When the drill bit approaches the bottom hole, the lowering speed shall be slowed down and the mud pump circulation shall be started. After contacting the bottom hole, run-in the bottom hole 0.5-1 m at low weight on bit (30% of normal value) and low speed (40-60 RPM), and gradually increase to normal parameters after forming a bottom hole model matching the new bit.
During the drilling process, it is necessary to pay close attention to the change of mechanical drilling speed and torque. In case of sudden torque change caused by hard interlayer, the rotating speed shall be reduced and the bit pressure shall be properly adjusted. Maintain sufficient mud displacement to ensure that the drill bit is sufficiently cooled and cleaned to prevent overheating of the composite sheet.
certificate
Welcome to our Frequently Asked Questions page. We have compiled answers to common questions you may have, hoping to provide you with clear and quick solutions. If you cannot find the information you need here, please feel free to contact our customer support team.
This pdc water well drilling bits is specially designed for complex water well drilling formations. it adopts 1308/1613 series PDC composite sheet with excellent impact toughness and steel body structure optimized by fluid mechanics. Compared with traditional cone bit, the rate of penetration (ROP) in soft to medium hard rock (f = 4-10) is increased by more than 50%, significantly shortening the drilling cycle and accepting large orders.
Number of blade wings
3-6 wings
Cutting teeth
13/16/19mm
Interface
API standard thread
The “force balance” tooth design is adopted to ensure the stability of the drill bit when working at the bottom of the well. Through the design of 15 ° back inclination angle, the impact resistance of the composite sheet is increased by 30% while ensuring the aggressiveness, which effectively responds to the impact load of the interlayer formation.
High-density thermally stable polycrystalline diamond and cemented carbide blocks are embedded in the gauge parts. The wear resistance of the gauge is 5 times of that of the common surfacing process, which ensures the regularity of the borehole and avoids the risk of sticking caused by diameter reduction, and is suitable for deep water well operation.
Optimize the nozzle angle and flow path design through CFD fluid simulation, and increase the chip removal area by 20%. When drilling into clay or shale layer with large displacement, it can effectively prevent the mud from wrapping the bit and maintain continuous and efficient cutting.
The main body is made of 42CrMo high-strength alloy steel. After integrated heat treatment process, the hardness reaches 40-45 HRC and the yield strength exceeds 900 MPa. While maintaining high strength, it has good repair, and the drill body can be used for multiple tooth replacement and re-welding.
The use of imported high silver solder with induction brazing process, welding shear strength of more than 280 MPa. Strict temperature control to prevent thermal damage of PDC composite sheet, prevent tooth drop accidents during drilling, and ensure the safety of downhole operation.
The bit performs well in mudstone, sandstone and medium-hard limestone (compressive strength <120 MPa), which is common in water well drilling. Compared to roller cone bits, the no moving parts design eliminates the risk of bearing failure and extends the footage life of a single bit by 2 times.
| Bit Size (Inch/mm) | Blade Count | Cutter Size (mm) | Connection Thread (API Reg) | Rec. WOB (kN/mm) | Rec. RPM (r/min) | Nozzle Qty |
| 3 1/2″ (89mm) | 3 / 4 | 1304 / 1308 | 2 3/8″ API Reg | 0.4 – 1.0 | 80 – 250 | 3 |
| 4 5/8″ (118mm) | 3 / 4 | 1308 | 2 7/8″ API Reg | 0.4 – 1.2 | 80 – 220 | 3 |
| 6″ (152mm) | 3 / 4 / 5 | 1308 / 1613 | 3 1/2″ API Reg | 0.5 – 1.4 | 60 – 200 | 3 / 4 |
| 7 7/8″ (200mm) | 4 / 5 | 1613 / 1913 | 4 1/2″ API Reg | 0.5 – 1.5 | 60 – 180 | 4 / 5 |
| 8 1/2″ (216mm) | 4 / 5 / 6 | 1613 / 1913 | 4 1/2″ API Reg | 0.6 – 1.6 | 60 – 160 | 4 / 5 / 6 |
| 12 1/4″ (311mm) | 5 / 6 | 1913 | 6 5/8″ API Reg | 0.6 – 1.8 | 50 – 140 | 6 / 7 |
| 17 1/2″ (445mm) | 5 / 6 / 8 | 1913 | 7 5/8″ API Reg | 0.8 – 2.0 | 40 – 120 | 7 / 9 |
Aiming at the common mudstone and clay layer in water well drilling, the optimized open flow channel and large water hole design, combined with high flow rate mud erosion, solved the mud bag phenomenon caused by the poor chip removal of the traditional drill bit, and kept the ROP at a high level of 20-30 m/h.
For the high abrasive sandstone layer, we use reinforced PDC composite sheet in the outer row of teeth, which is very hard and wear-resistant. It solves the problem that the tooth surface of the steel tooth drill bit needs to be ground and changed frequently within a few hours, and the life of a single drill bit can usually complete the drilling of the whole well.
For deep water well projects above 300 meters, the long life of PDC bit greatly reduces the number of trips. The problem of increased non-production time (NPT) and waste of fuel and labor costs caused by frequent bit changes is solved.
Applicable to contractors undertaking agricultural irrigation wells, industrial wells and drinking water wells. The pdc water well drilling bits can help it quickly penetrate sedimentary rock formations within a limited budget and duration, improving project delivery speed and profitability.
In view of the situation that geothermal wells are often deep and complex lithology, high temperature resistance and long life drill bits are needed. Our products in the deep high temperature environment still maintain stable cutting performance, suitable for geothermal HVAC hole and deep geothermal power generation wells drilling.
It is applicable to core pilot hole drilling in mineral resources exploration. The high gauge capability of the PDC bit can ensure a smooth borehole trajectory, provide a high-quality borehole structure for subsequent rope coring or casing running operations, and reduce in-hole accidents.
For drilling consumables distributors around the world. We provide API standard certification and stable quality control. The products have extremely high cost performance and re-purchase rate. They are suitable for replacing and upgrading products of roller cone drill bits into distribution catalogs.
Carefully check whether the cutting teeth of pdc water well drilling bits are chipped, and whether the nozzle is firmly installed and free of blockage. Confirm that the drill bit thread specification matches the drill collar, and apply special thread oil to the thread to prevent galling.
Use the recommended torque values for the make-up operation. It is strictly forbidden to directly use a sledgehammer to hit the diamond composite part. Use a bit box to hold the bit to avoid damage to the gauge position.
When the drill bit approaches the bottom hole, the lowering speed shall be slowed down and the mud pump circulation shall be started. After contacting the bottom hole, run-in the bottom hole 0.5-1 m at low weight on bit (30% of normal value) and low speed (40-60 RPM), and gradually increase to normal parameters after forming a bottom hole model matching the new bit.
During the drilling process, it is necessary to pay close attention to the change of mechanical drilling speed and torque. In case of sudden torque change caused by hard interlayer, the rotating speed shall be reduced and the bit pressure shall be properly adjusted. Maintain sufficient mud displacement to ensure that the drill bit is sufficiently cooled and cleaned to prevent overheating of the composite sheet.
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