How Does a Tricone Drill Bit Work?

The insert tricone roller bit is under the effect of the weight on bit and the rotation of the drill string. After the teeth are crushed, they also eat into the rock, and at the same time, there is a corresponding sliding to shear the rock.

In oil drilling, the roller cone drill bit can adapt to the drilling of various formations and is one of the main rock breaking tools. The movement of the toothed tricone roller bit at the bottom of the well determines the movement of the cones and the teeth, which directly determines the crushing effect of the teeth on the formation rock.

Therefore, before understanding how the drill bit works to break rock, it is important to understand the movement of the drill bit at the bottom of the hole. The motion state and stress state of the roller cone bit when it works at the bottom of the hole are quite complicated.

A lot of work has been done on the working principle of the roller cone bit, whether in theoretical or experimental research, and these research results provide the basis for the design and use of the bit.

Ⅰ. Analysis of the working principle of the insert three-cone bit

1. The revolution of the drill bit: The movement of the drill bit cone rotating in a clockwise direction around the axis of the drill bit is referred to as the revolution of the drill bit. The speed at which the drill bit revolves is the rotation speed of the turntable or the downhole power drilling tool.

When the drill bit revolves, the cone rotates around the axis of the drill bit. The linear speed of each row of teeth on the cone rotating around the axis of the drill bit is different, and the linear speed of the outer teeth is larger.

2. Rotation of the drill bit: When the drill bit rotates, looking in the direction from the bottom plane of the cone to the tip of the cone, the counterclockwise rotation of the cone bit around its own axis is called rotation.

The rotation of the cones is the result of the reaction of the rock to the crushing action of the teeth.

3. Factors affecting the rotation speed of the cone: revolution speed, bit structure, tooth surface structure, drilling parameters and rock properties, etc.

In general, the rotation speed of the roller cone is faster than the revolution speed of the roller cone bit. The ratio of the rotation speed of the cone to the revolution speed of the drill bit is called the wheel-to-head ratio, and the value of the wheel-to-head ratio is generally between 1–1.5.

Compared with the general mechanical sliding bearing, the sliding bearing system of the insert tricone roller bit has special characteristics in the bearing structure, the load it bears, the working environment of the bearing and the relative speed between the sliding pairs.

The radial circular runout at the drill tip should be within 0.02mm after the tool of the insert tricone bit is clamped. For the machining method of workpiece rotation, the deviation between the workpiece rotation center and the tool center line should be within 0.02mm.

The tool holder overhang should be as short as possible to enhance its mounting rigidity. The cutting fluid should be selected reasonably to reduce the friction and heat dissipation conditions during drilling.

Drilling is generally used for rough machining. The main function of cutting fluid is to improve the life of the drill bit, that is, to have better cooling performance. Usually, emulsified oil aqueous solution is used, which has large heat capacity, high thermal conductivity and good cooling performance.

If the drilling roughness and accuracy are required, the three-cone drill bit should use the cutting oil mainly for lubrication. For example, when machining aluminum alloy workpieces, it is appropriate to use the mixed oil of engine oil and kerosene.

When it rolls at the bottom of the well, the teeth on it will sequentially impact and press into the formation, and this effect can crush a part of the rock at the bottom of the well.

At the same time, relying on the sliding of the tricone drill bit makes the shearing effect weaken the remaining rocks between the teeth, so that all the rocks at the bottom of the well are broken and the wellbore can be extended.

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Focus on drilling bits for 20 years.

Among all the drill bit manufacturers in China, Cangzhou Great Drill Bits Co.,Ltd. is famous for its specialty and service quality.

Excellent Feedback from customers:  More than 20 Engineers & 100 senior technical & 50 sales and services team.

PDC rock drill bit, as a star product in modern drilling field, has been warmly sought after by the market for its excellent performance and wide applicability. Behind this, the market competitiveness of PDC rock drill bit manufacturers plays a decisive role. In this paper, we will analyze the market competitiveness of PDC rock drill bit manufacturers from various angles.

Technological Innovation Ability

Technological innovation ability is one of the core competitiveness of PDC rock drill bit manufacturers. With the continuous progress of science and technology, the performance requirements of drilling bits in the field of drilling are also increasing, and PDC rock drill bit companies need to follow the market trend, constantly carry out technological innovation, and improve the performance and quality of their products. For example, advanced material technology, precise manufacturing process and intelligent production process are adopted to enhance the wear resistance, impact resistance and drilling efficiency of PDC drill bits. At the same time, we explore new application areas and technology routes through continuous R&D investment to maintain our leading position in the pdc drill bits market.

Product Quality And Reliability

The product quality and reliability of PDC rock drill bit manufacturers are directly related to their market competitiveness. High-quality PDC drill bits can maintain stable performance under complex geological conditions, reduce failure rate and improve drilling efficiency. Therefore, PDC rock drill bit manufacturers need to strictly control product quality, and strive for excellence in all aspects from raw material procurement, manufacturing to quality testing. At the same time, establish a perfect quality management system and after-sales service system to solve the problems encountered by customers in the process of use in a timely manner and improve customer satisfaction.

Brand Influence And Market Channels

Brand influence is an important advantage for PDC rock drill bit manufacturers in the market competition. Famous brand often attracts more customer attention and trust, and increase market share. PDC rock drill bit manufacturers need to focus on brand building, through advertising, exhibitions, industry conferences and other ways to improve brand awareness and reputation. At the same time, actively develop market channels, establish long-term and stable cooperative relationships with domestic and foreign customers to expand market share.

In addition to the above three aspects, PDC rock drill bit manufacturers also need to pay attention to changes in market demand and competitive situation, and timely adjust the market strategy and product strategy. For example, launching customized PDC drill bit products for different customer groups and application areas; formulating effective competitive strategies for competitors’ strengths and weaknesses, etc.

To summarize, the market competitiveness of PDC rock drill bit manufacturers is affected by several factors. Only by continuously improving technical innovation ability, ensuring product quality and reliability, strengthening brand building and market channel development, etc., can they be invincible in the fierce market competition.

Focus on drilling bits for 20 years.

Among all the drill bit manufacturers in China, Great Drill Bits is famous for its specialty and service quality.

Excellent Feedback from customers:  More than 20 Engineers & 100 senior technical & 50 sales and services team.

A Brief Introduction to Cone Drill Bit

In oil drilling and geological drilling, the cone drill bit is the most widely used. When the bit rotates, it can impact, crush and shear the stratum rock. Therefore, cone drill bit can adapt to soft, medium and hard strata. Especially after the emergence of jet type cone drill bit and long nozzle cone drill bit, the drilling speed of the bit has been greatly improved, which is a major revolution in the development history of the bit.

According to the type of teeth, cone drill bit can be divided into milling (steel teeth) cone drill bits and insert (carbide teeth inlaid on the cone) cone bits for drilling. According to the number of cone, it can be divided into single cone drill bit, tricone drill bit and assembled multi cone drill bit. The tricone drill bit is the most widely and commonly used. The cone suppliers shall pay attention to whether the quality inspection is qualified when selling the cone drill bit.

Tricone drill bit is an important tool in oil drilling. Its performance will directly affect the quality, efficiency and cost of drilling. The effective way to reduce drilling cost is to increase the mechanical drilling speed and service life of bit. It has been proved by some data that the improvement of drilling rate has more influence on reducing drilling cost than the improvement of bit service life. The improvement of bit cutting structure is the most direct way to improve the mechanical drilling rate.

For a long time, the improvement of the cutting structure has focused on the main cutting tooth structure. For example, in the structure of cemented carbide teeth, people have invented wedge teeth, spoon-shaped teeth, partial top spoon-shaped teeth and equal wear tooth, etc. It is gradually recognized that the diameter maintaining structure also has a great impact on the bit mechanical drilling speed and service life. In particular, the bit used in highly deviated wells and horizontal wells requires a reasonable diameter maintaining structure. Many new types of diameter maintaining structures have been developed and applied to cone drill bits with good results.

Cangzhou Great Drill Bits Co.,Ltd. has roller cone bits for sale, and out quality and service is trustworthy. Welcome to know more about us and purchase our products.

As one of oil well drill bit manufacturers, we will do our best to meet all the needs of customers.

Overview of PDC Hole Opener

PDC Hole opener is designed for the enlargement of pilot holes and large hole applications. They are also used for road and river crossing applications.

The hole opener is made of AISI 4145H fully heat-treated alloy steel. All products have carbide grinding teeth and inserting tools. Body and cutters are hard-faced in three different designs with different conditions and rock formations. We also can design of the PDC hole opener blade allows replaced in the field.

We offer innovative drilling technology to mitigate drill string vibration during reaming. GREAT hole opener solution can help you solve your challenges, whether you use a rotary steerable drill combination, a rotary motor drill combination, or a traditional rotary drilling system. Our reaming tools operate at high efficiency, increase equivalent cycle density (ECD), reduce the risk of fractured formations, reduce torque and drag, and overcome drilling challenges.

The Advantage of drill bit opener

The body is machined out of a single block of heat-treated AISI 4145H alloy steel.

Compared to the roller hole opener, the hole opener drill bits performs better during the drilling process. The post-maintenance process is much simpler, just replace the PDC cutter, which can reduce the production cost later.

Depending on the formation and the customer’s special requirements, different sizes of PDC hole openers can be produced.

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Overview of PDC Cutters

PDC cutters are made of diamond micro-powder and cemented carbide substrate sintered under ultra-high pressure and high temperature. It has high hardness, high wear resistance and thermal conductivity of diamond, and has the strength and impact toughness of cemented carbide. PDC cutters are widely used in oil well field PDC bit, geological PDC exploration bits, gas exploration bits, coal mining drilling applications. Various used for PDC bit, PDC core bit, and PDC hole opener, PDC reamer. PDC cutters’ performance has a decisive influence on the drilling effect and life of PDC bit.

We have built very close cooperation with Top brand pdc cutter manufacturer in the USA and China, we have our patented cutters to the customers drilling demand.

Our popular size is 1913mm, 1613mm, 1616mm ,1313mm, 1308mm,1305mm.

The Advantage of pdc drill bit cutters

1. Conical cutters

Innovative diamond element increases drilling speed, improves stability in hard-to-drill formations, Advanced rock destruction mechanism, Enhanced bit durability.

2. PDC Up-drill

Brazing high-quality PDC cutter at a specific angle, effectively remove the obstacles, protect the bit body from harm during up-drill process.

3. Arc PDC cutters gauge

High-quality arc PDC cutters gauge, increase wear resistance and stability of the drill gauge.

If you would like to understand more about GREAT PDC cutter application ,please feel free to contact with us.

Cangzhou Great Drill Bits Co.,Ltd. is a drill bit manufacturers in china, we have drill bit china for sale, rock drill bit, drill bit that makes big holes and etc. Welcome to know more about us.

Overview of Drag Bit

Drag bits for water well drilling are manufactured from forged high-quality alloy steel and hard alloy, plus state of art welding technology and multiple precision heat treatment to provide the highest penetration rate and longest lifespan at the roughest condition.

A wing drill bit is usually designed for soft formations such as sand, clay or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, environmental and exploration drilling. Whenever possible, they should be used to drill pilot holes because they produce cuttings that are easiest to log.

Three-wing bits tend to drill faster, whereas four-wing bits are longer-lasting, more durable, and drill a straighter hole.

The Advantage of drag bit drilling

The blade system allows you to replace worn or damaged individual blades rather than the entire bit. The cost of purchasing multiple blade types and sizes is much lower than the unit. Prepare a variety of blades to ensure your time on site is most effective. The drag bit is suitable for the formation with low hardness and high plasticity.

From 3 7/8″ three-step bits to 6 1/4″ four-step bits to the various sized chevron bits, this replaceable blade system offers high-quality carbide-tipped wings that weld onto your pipe or threads are cost-effective and versatile.

GREAT also produces and sells various drill bits for oil fields, mines, geological surveys, hydrology exploration, engineering piling, geothermal development, Wells and other applications. At the same time, we will provide specific solutions according to customer requirements and actual drilling conditions

Great Drill Bits is a drill bit manufacturers in china, we have drill bit china for sale, rock drill bit, drill bit that makes big holes and etc. Welcome to know more about us.

Overview PDC Reamer

The PDC Reamer manufactured by GREAT drill bit will be your best choice to deal with the complicated situation. Our PDC reamer brand is Crocodile.

No matter be drilling or after finish drilling, no matter what kind of formation, the“Crocodile PDC-reamer” will give you reliable, efficient drilling experience, it can increase drilling efficiency, make a more better-quality wellbore. What more, the “Crocodile PDC reamers can prevent pipe sticking, reduce probability or malfunction.

During the drilling operation, we may have met some complicated formation, just like limestone, sticking salt and so on, the drilling stem almost be contorted like a curve of sine as the depth added. You will get a poor quality wellbore, it will be a huge challenge for tubular running. What more, reduce efficiency and need more cost.

The Details of PDC Reamer for Sale

What is the Crocodile PDC-R eamer:

Like a stabilizer;

Reduce probability or pipe-sticking;

Increase drilling efficiency;

Reduce cost;

Suit for MWD and another high-tech tool;

High-quality borehole;

Effective work with lower torque.

The Advantage of PDC Reamer for Sale

The body of “Crocodile PDC-reamer” comprised of high-quality steel or non-magnet material, it’s so reliable that it can meet all kinds of challenges. The non-magnet material suit for MWD and another high-tech tool, it can give you unprecedented operation efficient. Compare the stabilizer or conventional reamer, the carbide inserts arrangement on the blades was design by the “equal density” principle, it can effectively cut the wall of a hole. All the carbide inserts exposed in the mudflow, it can take enough cooling and lubrication. So, the wear and tear of inserts are more slowly, and also effective work at lower torque.

The special tapered surface design ensures that the cutter is exposed to the drilling fluid. Therefore, this can clean the certification and extend its life, increase fluid flow and avoid drill bits.

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1. Choose the drill bit types appropriately

(1) According to the lithology of the drilled formation, the following principles should be followed when selecting the type of drill bit:

a. In the shallow well section where the rock is cemented and loose, the drilling speed of the drill bit and the prevention of mud packs should be considered;

b. In the deep well section where the trip is long, the footage of the drill bit should be considered;

c. When the outer row teeth of the drill bit out of the well are severely worn, a bit with gauge teeth should be used;

d. In the easy deviating well section, a bit with small slip and many short teeth should be used;

e. Wedge-shaped tooth drills should be used when selecting insert drills;

f. For diamond limestone, it is advisable to use double-cone-tooth and projectile-shaped tooth drill bits;

g. When there is more shale in the formation or the density of drilling fluid is higher, a bit with a larger slip amount should be selected;

h. When the stratum is limestone or sandstone, and a bit with a smaller slip amount should be selected;

i. When drilling hard and highly abrasive stratum, it is advisable to use pure rolling button and double bevel bit.

(2) In order to optimize the hydraulic parameters of tricone bit, the longer nozzle and unequal diameter combined nozzle bit should be preferred. You may be interested in tricone bits manufacturers and get more information.

2. Inspection of a drill bit before drilling

(1) Check whether the model and diameter of selected bit meet the requirements;

(2) Carefully check whether the thread, weld and teeth of the drill are in good condition;

(3) Check whether the nozzle is installed firmly and the water hole should be unblocked; when rotating the cone of the rock bit by hand, the bearing seal should be intact; the pressure compensation system of the drill bit should be intact, and the pressure relief hole should not be blocked.

3. Matters needing attention when a drill bit enters the well

(1) After cleaning the drill thread, apply special thread oil;

(2) Choose a suitable loading and unloading device, and do not jerk when the drill bit is put into the loading and unloading device;

(3) Tighten according to the specified torque;

(4) The drilling operation should be stable, and no hard pressure should be encountered in case of resistance. Drilling of the insert bit should be slow to avoid damage to the alloy teeth in the hard formation and irregular hole;

(5) When drilling down and encountering an obstruction, the depth of the well, the situation and time of the obstruction should be noted, so as to determine the cause of the obstruction and control the working time;

(6) Drill down to a certain distance to the bottom of the well (a single root). The pump should be turned on and the turntable should be slowly lowered. It is strictly forbidden to go down to the bottom to open the pump.

4. Precautions for drilling of a drill bit

(1) The new drill bit should be run-in lightly for about half an hour, and then gradually increase to the specified WOB, and it is strictly forbidden to pressurize to start the turntable;

(2) Concentrate and deliver the drill evenly when operating the brake lever to prevent accidents of slipping and sudden drills;

(3) During roller tricone bit drilling, the changes in lithology and the working conditions of the bit should be analyzed at any time according to the change of the drill pair and the operation of the bit, and the drilling parameters should be adjusted in time.

5. Determine the starting time of a drill bit

(1) Determine according to the wear of the bearing and teeth, the phenomenon of bearing damage:

The turntable has periodic jumps. If the bit pressure is small, the jump is light. If the bit pressure is big, the jump is heavy; the drilling speed drops; the pump pressure is normal but the pointer of the weight indicator swings.

(2) The phenomenon of cone jamming:

The load on the turntable increases; the turntable chain jumps; the kelly rod is crappy; the turntable is stopped and the car is reversed; the drilling speed drops; the weight indicator pointer swings severely.

(3) The phenomenon of tooth grinding (stripping):

The load of the turntable is reduced; the kelly does not jump; the drilling speed is significantly reduced or there is no footage; the weight indicator indicates smooth and no swing; the pump pressure is normal.

Learn more about pdc core bit, rock reamer, tooth bit, polycrystalline diamond drill bits, mining drill bit, etc.

Great Drill Bits is a drill bit manufacturer, we have china drill bit for sale, rock drill bit, drill bit that makes big holes and etc. Welcome to know more about us.

1. The structure of PDC drill bit

The composite sheet of the PDC drill bit is usually cylindrical, and a thin layer of synthetic diamond is made on the tungsten carbide substrate. When drilling, the shape of the composite sheet must be kept intact to ensure that the drill bit can operate reliably in accordance with the designed 3D geometry cutting structure.

The cutting structure of a PDC bit may seem simple, but it is usually the most complicated part of a PDC bit design. Usually, the composite pieces are arranged in rows for better cleaning of cuttings. Each row is arranged along the top of the blade, protruding downward, supporting the cutting structure and keeping it in place, while effectively connecting the cutting structure to the end of the drill string. Between the blades is a chip flute, which is a channel through which the drilling fluid washes the cuttings from the face of the drill bit during drilling.

The bit body of PDC bit is divided into carcass and rigid body. The interface of the carcass PDC bit is made of steel and transitions to tungsten carbide composite material on the outer surface. The steel body PDC drill bit is made of crude steel and then coated with hard surface material to increase corrosion resistance.

2. Ideas of pdc drill bit design

The PDC bit can be designed into almost infinite variable combinations, so it can be modified according to the drilling application. The demand side can design and adjust it by engineers and designers by proposing performance requirements.

The ultimate goal of designing a PDC bit mainly includes two, to increase the total footage or the ROP.

Before the design starts, we need to fully understand the drilling application, including drilling rig capacity, speed (RPM), weight on bit (WOB), flow rate (TFA), drilling tool (BHA), formation strength and hardness, and drilling distance. After collecting and analyzing this information, the previous similar execution methods and execution results should be compared and analyzed according to the drill bit database. Before proceeding to the bit design part, these empirical data and all external factors should be used to create design and performance expectations.

Great Drill Bits is a drill bit manufacturer, we have drill bit china for sale, rock drill bit, drill bit that makes big holes and etc. Welcome to know more about us.

We, Cangzhou Great Drill Bits Co. Ltd., specialized in R&D, design, production, and sales of various drill bits. The drill bits size from 3″ to 26″, HDD Hole opener from 8“- 48“, Such as PDC bit, Roller bit, Tricone bit, PDC Coring bit, Bi-center bits, Hole opener, etc. The Company consistently adheres to the concept of industrial development to promote energy development, adhered to innovative drive, scientific development, and is one of the largest scale companies in Asia for PDC bit and Tricone bit, Hole opener manufacturer.

Our best drill bit for rock production line includes Matrix body PDC bit and Steel body PDC bit. Tricone bit is mainly Three best drill bits for rock, and according to the drilling formation different, we have TCI bit and Steel tooth bit available. In some HDD(Horizontal directional drilling ) project, we have Rock reamers for hard formation. Our Roller bit core barrel is widely used for piling foundation too.

We offer different types of rock drill bits for sale and can recommend the right type according to your drilling request.

Why Choose Great Good Quality rock drill bits for sale:

Two manufactures: New manufacture with 40,000 square meters in Hebei Province, very near to Beijing, and build our own R&D Exchange Center in Beijing.

Government gives us a High-tech Firm Authories Certification, we got API Spec7-1 Quality Control Standard. ISO9001:2008 Quality Management System.ISO14001:2004 Environment Management System.

Mazark machines are imported from Japan.

Strong designs, engineers, production, sales and after-sales service team.

OEM&ODM  service with confidentiality agreement.

We are strictly quality control our PDC bit, Tricone bit, Hole opener quality, The precision of CNC lathes is ±0.01mm, it can meet all the turning requirements. And after turning a certain numer of pieces, we must change the tool of lathes to make sure the precision of machines.

According to the manufacturing standard the quality department tests every process strictly and carefully.  

As one of most professional drill bit manufacturers in China,  we strictly control the whole production process, and we inspected the finished drill bits, we can also make several design changes according to the customer’s feedback, and finally, ensure the customer’s excellent drilling effect.

Meanwhile, we can provide our engineer service in the field.

GREAT drill consistently adhere to the concept of industrial development to promote energy development, adhered to innovative drive, scientific development, and is one of the largest scale companies in Asia for PDC bit and Tricone bit, Hole opener manufacturer.