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Welcome to the website of Jiangxi Feilong Rock Bit Manufacture Co., Ltd.!

Rock reamer series

2021-12-0118Author:Jiangxi Feilong Rock Bit Manufacture Co., Ltd.

1、Summarize

This series of drilling tools are non-excavation and crossing drilling industry. Our company independently designs and produces pulley palm pieces, and can produce all kinds of pulley amplifiers suitable for non-excavation and crossing drilling machines and various strata.

2、Structural features

According to the characteristics of the rig and different strata, choose the most appropriate tooth type and bearing structure.

Palm tip width and thick wear resistant alloy, palm back inlaid with wear resistant alloy to reduce wear.

Water force breaks rock.Slag discharge is smooth to reduce slag accumulation.

Welding process is guaranteed to prevent welding from overheating.

The bit body guide belt is designed with good guidance effect to make the hole amplifier smoothly contact the well wall.

Reasonable design of the drill body guide belt, good guidance effect, make the hole amplifier smoothly contact the well wall, effectively reduce the tendency of pipeline track change.

3、Recommended drilling parameters

Formation

Bit Type

Cone Rotary Speed

(r/m)

Soft with low compressive strength, such as shale, clay, sandstone, soft limestone, etc.

517

120-60

Formation with moderate hardness with high compressive strength, such as hard shale, limestone, sandstone, dolomite, etc.

617

100-40

Formation with high compressive strength, medium-hard and high abrasive properties, such as limestone, dolomite, sandstone, flint, etc.

637

90-30

Note: The upper limits of drilling weight and rotary speed recommended in above table could not be used at the same time.

4、Main Models

Bit size

OD of shaft

Cone size

Cone type

Thread

mm

inch

320

105/127

8 1/2

517

537

617

637

310-311

420

127/165

9 1/2

410-411

500

203

9 1/2

620-621

600

203

9 1/2

620-621

700

203

10 5/8

620-621

800

203

10 5/8

620-621

900

228

12 1/4

620-621

According to the customer’s requirements hole openers of different specifications can be produced.