Conditions of Use of Tricone Roller Bits and Basic Conditions for Well Entry

1. Conditions of use of the tricone roller bit

The use conditions of the tricone bit are very important, and it is the premise of a good work of the bit. Before use, you need to read carefully about the use of the tricone roller bit.

(1) If there is a phenomenon of skipping drilling in the well, the drill should be tripped out in time to check the drill bit.

(2) The PDC bit should be clamped with a make-up and shackle tool, the bottom of the well is clean, there is no metal falling, the downhole condition is normal, the wellbore is unobstructed, and the bit can go down to the bottom of the well smoothly; the tricone bit should be lightly pressed and slow. Turn smoothly to contact the bottom of the well.

The roller cone bit should be "run-in" for about 1 hour, and then drill according to the design requirements; the PDC bit should be lightly pressed and slowly rotated at the bottom of the hole to "shape" 1-2 meters, so that the bottom of the hole matches the bit, and then follow the design. Parameter drilling.

There are corresponding technical measures for drilling and dealing with abnormal conditions in the well. In the event of a tricone bit accident, it shall be reported truthfully so that correct measures can be taken, and an accident report shall be written in accordance with relevant regulations and requirements.

(3) When loading and unloading the tricone bit, use a bit box that matches the specifications of the bit to avoid damage to the bit body. Under any circumstances, tongs should not be used to bite the slap of the drill bit and the cone body. During the drilling process, the drill should be operated, and the drill should be fed evenly, and the turntable should not be started under pressure.

Nozzle circlip (the circlip can be flexibly rotated after entering the groove, indicating that it has been stuck, otherwise it should be re-mounted); screw the nozzle into the water hole of the drill bit with the roller cone bit. Before entering the well, carefully analyze the usage and In the downhole situation, prepare for the good use of the drill bit.

2. Basic conditions for the tricone roller bit to enter the well

The type of the drill bit is suitable for the lithology of the formation; when there is no tool, the drill bit protection measures should be taken to avoid damaging the cutting teeth, check whether the "0" ring in the water hole of the drill bit is in good condition, and clean the nozzle.

The roller cone bit presses the nozzle into the water hole by hand or with a wooden stick: During the drilling process of the three cone bit, if it encounters resistance and cannot be hard pressed, according to the different conditions in the well, the pump top is opened in time to pass the water hole, and the small displacement is interrupted to cut the hole. , if it is invalid, it will trip out decisively and handle it according to the reaming procedure.

After drilling, when the drill bit is one single from the bottom of the well, the pump should be turned on to clean the well. The drill bit should be about 1 meter away from the bottom of the well, start the turntable and lower it to the bottom of the well, fill in the drill bit usage card in time, accurately describe the wear and tear of the drill bit, and record in detail Drill usage parameters.

The thread of the drill bit needs to be coated with thread oil when it is clean. Before entering the well, the inspection of the tricone bit has been completed, so the speed and quality of the entire construction will be very good, and the stability of the personnel will also be there.

Different geology requires different drill bits, check the type and diameter of the drill bit; for the drill bit itself, check whether the welding and teeth of the drill bit are in good condition, as well as the firmness of the nozzle, the performance of the water hole, the sealing of the bearing, Special attention should be paid to the inspection of these aspects, because this is the previous preparation;

The speed of the tricone bit should be slower when drilling down. This is to avoid damage to the alloy teeth when encountering hard formations, and sometimes scratching. At this time, you need to write down some things, including the depth of the well and the specifics of the scratching. condition and time so that it can help with repairs;

Each tricone bit has a fixed standard size. Under long-term wear and improper operation, it will lead to the reduction of the diameter of the drill bit, which can be manifested as a decrease in the diameter of the driving surface of the drill bit.

The diameter of the tri-cone bit also has the defect or loss of the steel teeth of the roller. Generally, the time for the tri-cone bit to drop the steel teeth exceeds 40 hours, and the diameter will be reduced.

The features of roller cone bits are why our customers love us.

1. The feeding port is equipped with a seasoning plate, which can easily adjust the feeding amount. The compression ratio of material molding is controlled within the corresponding ratio range, and the success rate is high.

2. The roller cone bit adopts hydraulic cylinder pressurization technology, and there is an accumulator in the hydraulic system, which can not only form pressure, but also run the equipment stably.