Double wall drill pipe, trenchless consists of inner drill pipe and outer drill pipe
Product Description:
The gas lift reverse circulation drilling technology has the advantages of large backflow, fast backflow, high drilling efficiency, high drilling efficiency, long drill life and good well quality. Safe and reliable drilling in complex formations. Continuous sampling (core) drilling, saving auxiliary time and reducing labor intensity, has been recognized in practice. It has become the main technical method for drilling water wells, geothermal wells, gas wells, coalbed methane wells and large-diameter projects at home and abroad, and the scope of application is getting wider and wider.
Double wall drill pipe
| Type | O.D.of the outer tube (mm) | I.D.of the inner tube (mm) | Outer dianeter of joint (mm) | Type of threads | Effective length (m) |
| WB114/65 | 114 | 65 | 156 | 41F | 6 |
| WB127/76 | 127 | 76 | 162/168 | 41/21F | 6 , 9.5 |
| DB127/76 | 127 | 76 | 184 | 51/2FH | 9.5 |
| WB140/88 | 139.7 | 88 | 184 | 51/2FH | 6,9.5 |
| WB219/130 | 219 | 130 | 240 | Factory standard | 6,9.5 |
| WK76/32 | 76 | 32 | 78 | 3" Remet | 3 |
| WK102/41 | 102 | 41 | 103 | 4" Remet | 3 , 6 |
| WK114/52 | 114.3 | 52 | 116 | 4 1/2" Remet | 3 , 6 |
| WK114/38 | 114.3 | 38 | 114.3 | 4 1/2" Metzke | 3 , 6 |
| WK114/50 | 114.3 | 50 | 114.3 | 4 1/2" Remet | 3 , 6 |
Drill pipe usage notes:
1. Before connecting the new drill pipe, apply thread oil on the threads
2. Trim and break at least 3 times before drilling
3. Hard bending and plastic coating can be processed according to the special requirements of customers.
Our Services:
1. Drill pipe strictly according to API ISO9001 standard.
2. If you found to quality problems within one month of the package returned.
3. All strictly according to the contract and fulfill the obligations and responsibilities.
4. 24 hours online customer service,feel free contact us.
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 7-30 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample need to pay the cost of products and freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
Product Tags:
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Black 4 1/2inch Inner and outer pipe of reverse circulation drill pipe Images
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