company news about How can I determine if the tricone bit is worn?

1. The bottom lip of the drill becomes smooth and the lens is slow, indicating a strong carcass.

2. The base of the body becomes inner and outer conical, indicating that the inner and outer diameters of the bit are not strong enough or that it has driven into broken rock.

3. The uneven and partial wear of the bit indicates that the triaxial position and the concentricity of the drilling tool are poor, and the nozzle and flume specifications are inconsistent.

4. The OD of the bit is very worn and even tapered, indicating that the bit has been scanning the hole or scanning the probe for a long time, or the OD of the bit is not good.

5. The bore of the bit is worn or even ground into a horn shape, indicating that the core has been swept for a long time, the core is blocked, or the bore of the bit is not strengthened.

6. The inner and outer diameters of the drill are worn at the same time, or even the steps appear, indicating that there are metal fragments and hard particles of rock debris at the bottom of the hole, the distribution of diamonds is uneven, and the inner and outer diameters are not well reinforced.

7. The speed of the drill matrix is too fast, and too much diamond exposure indicates that the matrix is too soft or too much dust and accumulation accumulates at the bottom of the hole.

8. The bit has grooves indicating that the bit is not adequately washed and cooled, diamonds are evenly distributed, and hard debris is present in the holes.

How to replace the bit after wear

When drilling, the power drive rotary table of the drilling rig, Kelly, drill pipe and drill bit rotate. Through the instrument on the ground of the drilling machine, observe the work of the underground rotating close-up rock bit. Comprehensive judgment, if the tricone bit has been worn, it is necessary to stop drilling and replace the bit immediately. After stopping drilling, keep the drilling fluid circulating for a period of time to adjust the drilling fluid properties and allow the cuttings suspended in the drilling fluid to float on the surface, circulate to stabilize the new well wall, and perform routine inspection of the drilling equipment. Drilling workers use crown on derrick, marching block and hook, according to the column according to the height of the column (usually consists of two or three drill pipe) from all the drilling tools on the drilling, pull out the pillars of the drill pipe discharge within the derrick, downhole drilling string put forward at the same time, with the drilling pump continuous perfusion in annular space, drilling fluid, purpose is to keep the liquid level height does not fall within the wellbore, The pressure wellbore balances formation pressure to prevent collapse of the shaft wall or entry of fluids from underground formations into the wellbore. At the same time, special attention should be paid to the possibility of adhesion due to borehole shrinkage.

The operator should strictly control the rate or depth of lift at the onset of drilling shrinkage. Once all the drill pipe and drill pipe in the wellbore are pulled out and the drill bit is replaced and pulled out at the same time, the worker removes the old bit, installs the new bit, and runs the hole in the original sequence to restore the drill hole.