Roller bit bit breaking method

7 Most Commen Piling Roller Bit Failure | Check to Avoid Them

 · Print. In our long term working at our client operation site, we found there are 7 most common piling roller bit failure as follow: Bearing Stuck. Cone Inner Circle Wearing Out. Lost Cone. Snapped Inserts. Inserts Quick Wear out. Lost Inserts. broken snapped leg.


The drill rig operator at the surface can cease drilling operations upon detection of the cessation of rotation of the roller element. The rotation impeder can also be seated in a drilling fluid outlet and cause a detectable loss in drilling fluid pressure when dislodged to otherwise cease rotation of the roller drill bit.

Roller-Bit Drilling | Article about Roller-Bit Drilling by The Free …

a drilling method that uses a roller bit (seeDRILL BIT). The method was first used in the USA in the 1920''s and in the USSR in the 1930''s to drill oil and gas wells. In roller-bit drilling, rock is cut by steel or hard-alloy teeth projecting from rolling cutters, which rotate on the drill-bit bearings.

Roller bit

Drilling roller bit contains paws 1 with inclined pins 2, on which, by means of bearings installed conic is EROSKI 3 with milled or cast teeth 4. All cones 3 teeth 4 crowns made oblique, i.e. with a slope to its generatrix at an angle α equal to 5 to 45°, while the smaller the value of the angle corresponds to the larger value of the angle of inclination of the axle 2 to the vertical axis of ...

Roller Bit Shirttail Wear-out, Top Criminal of Lost Cone?

 · Shirtail part is the thinnest part on the roller bit leg. It is as thin as a blade, easy to wear-out. And because it is so thin that can not be planed with inserts like the leg back. It is hard to protect it. 2. Shirtail part is the key spot to protect the sealing system. The dust and slurry can get to the bearing easily once the shirtail damaged.

The Working Method and Maintenance Method of Oil Roller Bit

The main rock breaking methods of oil roller bits:When the drill bit is drilled, the weight on the oil roller bit is applied to the rock through the teeth, and there is an impact load in addition to t...

Comparative Analysis of Roller Bit and PDC Bit

4.2 Advantages and disadvantages of PDC bit. (1) PDC bit is suitable for high speed, high displacement and low WOB, so the requirement of equipment is relatively high. (2) PDC bit''s working principle is basically the same as scraper bit, so it generally requires lower WOB and higher rotation speed.

Roller cutter drill bit and method of forming (Patent) | OSTI.GOV

The U.S. Department of Energy''s Office of Scientific and Technical Information OSTI.GOV Patent: Roller cutter drill bit and method of forming

Drilling Action of Roller-Cone Bits: Modeling and Experimental Validation …

 · This paper presents a new model of the drilling response of roller-cone bits. First, a set of relations between the weight-on-bit W, the torque-on …

Quality Tricone Roller Bit & TCI Tricone Bit factory from China

Professional TCI Tricone Bit 13 1/2" FSG515G IADC 515 For Gas Well Drilling. Bearing Type: Rubber Sealed Roller Bearing. Cutting Material: TCI. Standard: API …


Roller bit rearing wear detection system and method US6634441B2 (en) 2000-08-21 2003-10-21 Halliburton Energy Services, Inc. System and method for detecting roller bit bearing wear through cessation of roller element rotation US6648082B2


A roller bit for rock breaking by rotary cutting comprises: a bit body ( 1 ), a roller ( 2 ) and cutting teeth ( 3 ). An included angle β between a roller journal plane of the bit body and the roller on a bit axis has a range of 0°<β<90°, a journal offset S has a range of −D/2

A Drilling Rate Model for Roller Cone Bit with Experimental Verification …

 · the characteristics of rock-breaking mechanism of roller cone bit are not considered [6,7,8,9,10]. ... Yan T, Li W, Bi XL, et al. A new evaluation method of rock crushing efficiency base on the crushing work ratio. Fractal representation of rock drillability ...

Evaluation method for tooth wear of roller bits based on the …

 · During drilling operations, the drill bit is worn out while breaking the rock. The roller bit is an important rock-breaking tool, but our research on its wear mechanism is still inadequate. Therefore, in response to this problem, this paper establishes a fractal ...

The method of testing roller bits

The method of drilling wells with a preliminary break-in roller bits on a special stand and subsequent operation of them when blasthole drilling in hard and very hard rocks. This method has a major drawback, which is that during running the roller bit, not involved in the drilling and produces no useful work.


A method for detecting roller bit bearing failure of a roller drill bit attached at the lower end of a rotatable drill pipe string when drilling boreholes through earth formations comprising: measuring and displaying the ratio parameter ii: of the parameter of rotary torque in said drill string divided by the parameter of penetration rate of said drill bit through said earth formations when ...

Factors Affecting the Roller Bit Drilling

The size of the WOB determines the method and characteristics of rock breaking, which directly affects the drilling speed and the damage of the drill bit. During drilling, the rock bit is subjected to axial pressure and reverse force, and the cutting teeth are worn, dulled or damaged during the process of pressing and shearing the rock, which will definitely affect the drilling speed.


Aluminum, Flat curb with copper roller, measure about 5 1/8th wide but technically a 5 inch wide bit. From top to bottom shank is 7 inches long but from top of curb to reins rings is 5 inches long not counting height of curb port. This is a nice light weight bit with a lot of control.


2 THE IADC ROLLER BIT DULL GRADING SYSTEM SPE 23938 bearing-gage" (TBG) format for reporting bit wear.The AAODC bit grading method, adopted in 1963, used a 1-8 scale to describe teeth and bearing wear this method, an 8 represented teeth totally worn flat, broken, or lost, and bearings that were either locked or worn out.worn out.

,roller bit,

cone bit 1 eaking cuttings mechanism of cone bits and fractal method for rock drillability; 2.Application of deep end-cavity cylindrical roller bearings to cone bits; 3 ...


A system and method for detecting the wear of a roller bit bearing between a roller drill bit body and a roller bit rotatably attached to the roller drill bit body. A valve-plug is placed between the roller drill bit body and roller bit such that the valve-plug is removably fitted ...

Failure Analysis of Roller Cone Bit Bearing Based on Mechanics …

 · The roller cone bit is one of the most important rock breaking tools used in the oil–gas drilling industry. Its performance directly influences the drilling quality, efficiency and cost.

Roller Cone

 · Roller cone bits are of two types: milled-tooth and insert. They are designed to drill rocks of various types and strengths. The milled-tooth bits are generally used when tooth wear is not a critical issue, whereas the insert bits with tungsten carbide inserts are used when tooth wear becomes the limiting factor in the life of the bit.

IADC Roller Cone Bit Classification Codes System

 · The bits are classified according to the International Association of Drilling Contractors (IADC) code. The position of each bit in the chart is defined by three numbers and one character. The sequence of numeric characters defines the "Series, Type and Features" of the bit. The additional character defines additional design features.

Rollers bits | Rollers bits | Roller-bit drilling

Roller bit III 215,9 T-CV is designed for drilling hard low abrasive rocks, as well as for drilling very hard rock. Article: У00004637 Bit III 244.5 T-CV Price from $ 1 031.44 Learn more Roller bit III 244,5 T-CV is designed for drilling hard low abrasive rock and hard to ...

(PDF) Roller Cone Bit Dull Grading Manual

Roller Cone Bit Dull Grading Manual WO - Washed Out Bit A washout is where drilling fluid has eroded a passage from an internal flow area to the exterior of the bit. It is not limited to welds. This characteristic is used only in the "Remarks Dull Characteristic" column.

Roller bit rearing wear detection system and method

 · Justia Patents With Bit Wear Signal Generating US Patent for Roller bit rearing wear detection system and method Patent (Patent # 6,631,772) Roller bit rearing wear detection system and method Aug 21, 2001 - Halliburton Energy Services, Inc.

Roller Bit Model With Rock Ductility and Cone Offset

Practical methods for quantifying the kinematics of a particular roller bit design and describing the resultant bit/rock interaction are desired but elusive. The problem, in part, is that there is no simple set of dimensions which can be measured on a roller bit to characterize its design, nor are the rock properties readily measured or controlled.

Common Roller Cone Bit Dull Characteristics Causes

 · This dull feature means one or more of the cones did not turn during part of the Drilling bit run. This is indicated by one or more flat wear spots. Causes: Bearing failure on one or more of the cones, Junk lodging between the cones, A pinched bit …

Roller cone bit design

Roller cone bit design - PetroWiki

Method for simulating drilling of roller cone bits and its application to roller cone bit …

What is claimed is: 1. A method for optimizing a design of a roller cone drill bit, comprising: simulating the bit drilling through a selected earth formation; adjusting at least one design parameter of the bit; repeating the simulating the bit drilling; and repeating the ...

Roller Cone Bit

In general, the roller cone bit life increases in UBD than conventional drilling. In UBD the bit is exposed to less stress and low-solids nonabrasive mud. Also, UBD increases the ROP, leading to lower weight on bit (WOB) during the entire drilling process for the same ROP. This makes way for higher bit life.

Tricone Roller Bit

Tungsten Carbide Insert Tricone Roller Bit Showing 1 - 6 of 6 items Compare (0) Information About PRE-MAT Blog Contact No.48 Toh Guan Road East #06-107, Enterprise Hub Singapore 608586 Tel: (65) 6861 5323 Fax: (65) 6861 0082 Email: [email protected] Home ...

Roller bit for rock breaking by rotary cutting

A roller bit for rock breaking by rotary cutting comprises: a bit body (1), a roller (2) and cutting teeth (3). An included angle β between a roller journal plane of the bit body and the roller on a bit axis has a range of 0°<β<90°, a journal offset S has a range of −D/2