What Is a Diamond Bit?

The bit that makes the cutting edge is called a diamond bit. The drill is an integrated drill. The whole drill has no moving parts and has a simple structure. It has high strength, high wear resistance and impact resistance. It is one of the three new drilling technologies in the world in the 1980s. Field use proves that when drilling in soft-medium hard formations, diamond drills have the advantages of fast speed, long footage, long life, stable work, fewer downhole accidents, and good wellbore quality. The diamond bit is not only used for a long time, but also can be reused. The diamond bit returned to the factory for repair is similar to the diamond bit used in the factory, which can save a lot of drilling costs.

Diamond drill

The bit that makes the cutting edge is called a diamond bit. The drill is an integrated drill. The whole drill has no moving parts and has a simple structure. It has high strength, high wear resistance and impact resistance. It is one of the three new drilling technologies in the world in the 1980s. Field use proves that when drilling in soft-medium hard formations, the diamond bit has fast speed, long footage, long life, stable work, low underground accidents,

The quality of the drill bit, and whether the drill bit type is compatible with the formation lithology, play an important role in accelerating the drilling speed and increasing the footage of a single drill bit. Drilling an oil and gas well generally uses multiple drills of different sizes. When drilling upper formations, drills with larger diameters are used. Because the formations drilled by the drills are relatively soft, a single drill has more footage and a shorter time. One drill is generally Several wells can be reused; when drilling lower formations, drills with smaller diameters must be used. Because the formation is hard and the footage of a single bit is small, multiple drills are generally used. A new drill bit

1 The force balance design makes the drill bit have good guidance, suitable for the application of the downhole motor

The rock breaking action of the diamond bit is caused by

One. Diamond drill bit preparation before drilling

1. Check the last diamond bit for damage to the drill body, tooth loss, etc., and make sure that the bottom of the well is clean and free of falling objects.

2. Handle the diamond bit carefully, and place the diamond bit on a rubber pad or wooden board. Do not place diamond drills directly on iron plates.

3. Check whether the cutting teeth of the diamond bit are damaged, whether there is any foreign matter in the diamond bit, whether there is an O-ring seal in the nozzle hole, and install the nozzle as required.

two. Diamond drill bit buckle

1. Clean up the diamond buckle male or female buckle and apply silk buckle oil.

2. Clamp the shackle on the diamond bit and lower the drill string to make it contact with the male or female buckle.

3. Put the diamond drill bit and the shackle together on the turntable to fill the core, and then tighten the wire fastener according to the recommended tightening torque value.

three. Drill down

1. Lower the diamond drill bit slowly, especially through the turntable, blowout preventer and casing hanger to protect the cutting teeth. 2. Pay attention to the blocked well section that appeared during the last drilling. When drilling down and encountering shrinkage and dog legs, make the drill bit pass slowly.

3. When it is about 1 single from the bottom of the well, it will start to rotate at a drilling speed of 50 ~ 60rpm and start the pump to flush the bottom of the well with a rated displacement.

4. Pay attention to the indicator and torque to make the diamond drill bit smoothly contact the bottom of the well.

four. Diamond bit scratching

1. It is not recommended to use diamond drills for hole drilling.

2. If eye-scraping is necessary, the eye-scraping should be done with the rated displacement and low torque.

Fives. Diamond drill shape

1. Maintain the rated displacement and lower the diamond bit to the bottom of the well.

2. Use slow drilling at least 1m to establish the bottom hole model.

3. Increase the drilling pressure to the optimal value for normal drilling with an increase of 10kN each time. It is strictly forbidden to press too hard and cause the early damage of the diamond bit.

4. Keep the drilling pressure constant and adjust the drilling speed to obtain the best combination of drilling parameters.

six. Diamond bit drills normally

1. When encountering strong abrasive or hard sand and mudstone, reduce the drilling speed to extend the life of the diamond bit.

2. Adjust drilling rate and diamond bit to maintain the best drilling performance when stratum changes or interlayers are encountered.

3. Pay attention to the following points each time a single wire is received: 3.1 Restore the number of pump strokes and check the riser pressure. 3.2 in

Start the pump before the diamond bit touches the bottom of the well, and slowly lower the diamond bit to the bottom of the well at a drilling speed of 50-60 rpm. 3.3 Slowly restore pressure to the original diamond bit, then increase the drilling speed to the original drilling speed.

Proof of field use,

When drilling in soft-medium hard formations, diamond bits have the advantages of fast speed, long footage, long life, stable work, fewer downhole accidents, and good wellbore quality. The diamond bit is not only used for a long time, but also can be reused. The diamond bit returned to the factory for repair is similar to the diamond bit used in the factory, which can save a lot of drilling costs.