311mm Tricone Rock Drill Bit IADC 537 for Water Well Hard Rock Drilling

• Customization: Available
• Type: Core Drill
• Usage: Metal Drilling, Masonry Drilling, Well Drilling, Wood Drilling
• Model NO.: ROS 311mm
• Certification: API
• Name: Tricone Bits
• Item: Tricone Drill Bits for Sale
• Model: Tricone Bit for Well Drilling
• Item No: Tricone Bit Weight
• TCI Bit: TCI Tricone Bit
• Bits Sell: Tricone Bits for Sale
• Bits Size: Tricone Bit Sizes
• Model Name: Rock Drill Bits
• Item Name: Tricone Rock Bits
• Drill Bits: Tricone Drill Bits
• Transport Package: Wooden Box
• Specification: 311mm
• Trademark: ROSCHEN
• Origin: China
• HS Code: 843143210
• Production Capacity: 2000

Product Description

Tricone Roller bit is the most widely used drilling bit. When the roller cone bit is working, the cutting teeth alternately contact the bottom of the well, the torque of breaking the rock is small, the contact area between the cutting tooth and the bottom of the well is small, the specific pressure is higher, and it is easy to eat into the formation; the total working length of the working blade is large, thus relatively reducing the wear. Roller bit can adapt to a variety of formations from soft to hard.

According to the number of cones, it can be divided into single-cone bit, tri-cone bit, and assembled multi-cone bit. According to the cutting material can be divided into steel teeth (milled teeth) and insert tooth bit.


311mm tricone rock drill bit for well drilling
 

Basical Specification
Size of Rock Bit	12 1/4 inches
	311.1mm
IADC Code	KA517
Thread Connection	6 5/8 API reg pin
Factory Series	KA Series Elastomer sealed bearing
Operating Parameters
WOB            (Weight On Bit)	24488~69966lbs
	108.89~311.1KN
RPM	140~60R/MIN
Formation	Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc

IADC Specification

First Digit(1~8):

 -1,2, and 3 designate STEEL TOOTH BITS with 1 for soft,2 for medium and 3 for hard formations.

-4,5,6,7 and 8 designate TUNGSTEN CARBIDE INSERT BITS for varying formation hardness with 4 being the softest and 8 the hardest.

Second Digit(1~4):

 -1,2,3, and 4 are further breakdown of formation with 1 being the softest and 4 the hardest .

Third Digit(1~7):

This digit will classify the bit according to bearing/seal type-see information on different bearing types-and special guage wear protection as follows:

 -1. Standard open bearing roller bit.

-2. Standard open bearing roller bit,air-cooled.

-3. Standard open bearing roller bit with gauge protection which is defined as carbide inserts in the heel of the cone.

-4. Sealed roller bearing bit.

-5. Sealed roller bearing bit with gauge protection on heel  of cones.

-6. Journal sealed bearing bit.

-7. Journal sealed bearing bit with gauge protection on heel of cones.

Feature Code:

The following letter codes are used in the fourth digit position to indicate additional features:

A. Air Application

R. Reinforced Welds

C. Center Jet

S. Standard Steel Tooth

D. Deviation Control 

X. Chisel Insert 

E. Extended Jet 

Y. Conical Insert 

G. Extra Gage Protection 

Z. Other Insert Shape 

J. Jet Deflection 

 

NO.	TRICONE ROCK BIT SIZE		API THREAD REG.PIN
	in	mm
1	3 3/4	95.3	2 3/8
2	3 7/8	98.4	2 3/8
3	4 1/8	104.8	2 3/8
4	4 1/4	108	2 3/8
5	4 1/2	114.3	2 3/8
6	4 5/8	117.5	2 7/8
7	4 3/4	120.7	2 7/8
8	4 7/8	123.8	2 7/8
9	5 1/2	139.7	3 1/2
10	5 5/8	142.9	3 1/2
11	5 2/3	143.9	3 1/2
12	4 3/4	146.1	3 1/2
13	5 7/8	149.2	3 1/2
14	6	152.4	3 1/2
15	6 1/8	155.6	3 1/2
16	6 1/4	158.8	3 1/2
17	6 1/2	165.1	3 1/2
18	6 5/8	168.3	3 1/2
19	6 3/4	171.5	3 1/2
20	7 1/2	190.5	4 1/2
21	7 5/8	193.7	4 1/2
22	7 7/8	200	4 1/2
23	8 3/8	212.7	4 1/2
24	8 1/2	215.9	4 1/2
25	8 5/8	219.1	4 1/2
26	8 3/4	222.3	4 1/2
27	9 1/2	241.3	6 5/8
28	9 5/8	244.5	6 5/8
29	9 7/8	250.8	6 5/8
30	10 1/2	266.7	6 5/8
31	10 5/8	269.9	6 5/8
32	11	279.4	6 5/8
33	11 5/8	295.3	6 5/8
34	12	304.8	6 5/8
35	12 1/4	311.2	6 5/8
36	12  5/16	312.7	6 5/8
37	13 3/8	314.3	6 5/8
38	12  7/16	315.9	6 5/8
39	12 5/8	320.7	6 5/8
40	13 1/8	333.4	6 5/8
41	13 1/2	342.9	6 5/8
42	13 5/8	346.1	6 5/8
43	13 3/4	349.3	6 5/8
44	14 1/2	368.3	7 5/8
45	14 3/4	374.7	7 5/8
46	15 1/2	393.7	7 5/8
47	16	406.4	7 5/8
48	17 1/2	444.5	7 5/8
49	18 7/8	479.4	7 5/8
50	20	508	7 5/8
51	22	558.8	7 5/8
52	24	609.6	7 5/8
53	26	660.4	7 5/8
54	28	711.2	7 5/8
55	30	762	7 5/8

FAQ


Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.

Q: How about the delivery terms?
1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.

Q: How about discount?
A: Price is based on products and order quantity.

Q: Do you accept sample order?
A: Yes sure, please contact us for details.

Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.

Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products, Roschen always makes a serious inspection for all products and raw materials in strict procedure. We have obtained certificate of ISO9001:2000 in 2004






For more information please contact:


 
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
 
 
Website: http://roschen.en.made-in-china.com
 ; http://roschen.en.made-in-china.com 
http://roschen.en.made-in-china.com