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Quick Details

  • Place of Origin: Hebei, China (Mainland)
  • Brand Name: Deris
  • Model Number: 517
  • Type: 660 mm hole opener
  • Machine Type: Drilling Tool
  • Certification: API
  • Material: Stainless Steel
  • Processing Type: Forging
  • Use: Well Drilling
  • formation: soft to hard formation
  • Sealing type: Metal /rubber sealed
  • Bearing type: Journal /roller bearing
  • Tooth type: tungsten carbide insert/ steel tooth
  • Extral feature: gauge protection
  • Size: size12 to 66
  • Warranty period: 4 years
  • Name: oil well hole openers
  • Advantage: High-efficiency
  • Shipping terms: by sea or by air

Packaging & Delivery

Packaging Details wooden case for 660 mm oil well hole openers
Delivery Time within 7 days after we received the deposit

factory price high quality 660 mm oil well hole openers for soft hard formation 

Product Description



Type of cutter 







26 inch  (660mm)

8 1/2 IADC 637 TCI roller cone cutter, 

Metal-face sealed bearing

6 pcs of  cutters


7 5/8" Reg 

pin and box





Medium to hard  formations, such as hard shale, hard limestone 

sandstone, whinstone, flintstone, granite, quarts sandstone, 

hard dolomile, hard limestone,pyrite, etc


most favorable price and best quality

bearing type:

sealed bearing and non-sealed bearing

HJ(metal sealed journal bearing)  

HA (rubber sealed journal bearing


aircooled bearing type

Button size (extra features)

Button bit,saw teeth

1) Y-Conical teeth  2) X-chisel teeth

3)K- wide teeth

4)G- Gague protection


alloy steel, tungsten carbide insert


Wooden case or steel case

Payment terms


Delivery terms

By sea or by air

Delivery time

Within 7 days


Canada, USA, Middle east ,Africa, Europe


PS: Drilling plan :16''-22''-28''-34''-40''


Hole Openers are used to enlarge the diameter of a pre-drilled hole. They are custom built to specification, and come in a wide variety of sizes. A Hole Opener is sometimes referred to as a Reamer.


We are proud of the quality and workmanship of our custom built Hole Openers. All Hole Openers can be quoted with new/unused surplus or used Steel Tooth or TCI Cutters Hole Openers.

At some point it may be necessary to increase the size of a pre-drilled hole to a larger diameter or to drill large diameter holes. Hole opener bits are designed specifically for this purpose. Bits are custom manufactured in a wide range of styles to meet field requirements. A custom hole opener is an effective way of enlarging holes, hence the name "Hole Opener".

The Hole Opener Advantage

Straighter Holes - By drilling a smaller hole with a "pilot" bit, then attaching that said bit onto the bottom of the the hole opener. The hole opener will follow the path of the hole drilled by the smaller bit.

Larger Holes with Smaller Rigs - By drilling a hole in stages, larger holes can be drilled with smaller rigs. A smaller hole requires less power.

Replacing Cutters and Cutting Cost - On most Hole Opener designs, the cutters can be easily replaced. The cost to replace a cutter is a fraction of the cost to replace a large tricone rock bit.

Cost of Large Rock Bits - Larger diameter rock bits not only cost a lot, they can be difficult to find. A more economic solution is to use a hole opener that uses smaller tricone rock bit segments..

Flexability - Hole Openers can be fabricated in just about any size, and can be configured to drill through any formation.

Operational Considerations

Drilling Weight - The choice of drilling weight is determined based on the recommendations of the bit manufacturer and the number of cutters on the hole opener.

Number of Cutters - The number of cutters placed on a hole opener is governed by the following facts:

1.Maximum number which will fit around the perimeter.

2.The greater the number of cutters, the less the weight, which therefore reduces the penetration rate.

3.In softer formations, less weight is needed to penetrate.

4.The greater the number of cutters, the smoother the tool will run.

5.The greater the number of cutters, the greater the cost.

6.The greater the number of cutters, the longer the cutters will last

Rotary Speed - Maximum speed is determined by the manufacturer's recommendation and the calculation to account for the linear distance the cutter is moving per revolution.

Hole Cleaning - A frequently over looked point of hole opener operation is hole cleaning. The volume of cuttings to remove from a hole increase by a squared factor with an increase in hole diameter.


                    Bit Type



 117,127,(Steel tooth bit cutters),       417,437,517,527,537,617,637 (tci bit cutters)

18       457.2      117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)
22558.8  117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)
 26 660.4 117,127,(Steel tooth bit cutters),       417,437,517,527,537,617,637 (tci bit cutters)



  117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)



  117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)




117,127,(Steel tooth bit cutters),        417,437,517,527,537,617,637 (tci bit cutters)



  117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)



  117,127,(Steel tooth bit cutters),      417,437,517,527,537,617,637 (tci bit cutters)



 117,127,(Steel tooth bit cutters), 417,437,517,527,537,617,637 (tci bit cutters)


products show

 We can manufacture as your requirement such as size, type etc

Replaceable tricone bit cutters . You can know more detail click picture




Company Information

 Our company information

We are Hejian Deris Petroleum drilling equipment Co., Ltd specializes in drill bits, drill pipe, Mud pump and stablizers for  water well, oil field, construction, geothermal, directional boring, and underground foundation work all over the world. Our purpose is to sell the best quality products at the lowest possible price.
We are a professional supplier of new and used(rebuilt) drill bits. Including tricone bits, PDC bits and drill pipe. 

Various of madel and dimension available. Good condition and reasonable price. 
Our products meet API standard and the bit of international general type with IADC (the international association 

of drilling contractors) coding standards.
The principle of our company is based on the quality of survival. With advanced technology and scientific 

management, our company develops with reputations for providing quality products and best service.

We would like to establish business relations with you !!!

Contact Us


PLs add the information in your inquiry.

1) the size of the tricone bit

2) the IADC tooth model, like 537G

3) PLs tell the drilling information of the layer.

4) PLs tell the quantity.


Our PDC BIT ,Tricone bit for you reference If you like please



PDC bit You can know more detail click picture

TCI TRICONE BIT You can know more detail click picture


Steel tooth tricone bit You can know more detail click picture

Packaging & Shipping




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China (Mainland) | Trading Company
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