- Drilling Rig[6]
- Mining Machinery Parts[6]
- Other Material Handling Equipment[1]
- Other Metal Processing Machinery[1]
- Other Machinery[6]
- Used General Mechanical Components[6]
- Pneumatic Parts[1]
- Other Mechanical Parts[4]
- General Mechanical Components Stock[1]
- General Trade Agents[1]
- Pumps[6]
- Hydraulic Parts[1]
- Steel Pipes[6]
- Other Industrial Filtration Equipment[2]
- Other Filter Supplies[1]
- Machinery Design Services[1]
- Lifting Sling[1]
- Seals[1]
- Other Energy Related Products[2]
- Other Power Transmission Parts[1]
- Metal Processing Machinery Parts[1]
- Hoists[1]
- Winches[1]
- Engines[1]
- Material Handling Equipment Parts[1]
- Valves[3]
- Tool Parts[1]
- Pneumatic Tools[1]
- Contact Person : Mr. liu Leo
- Company Name : Beijing Ocean Renda Petroleum Equipment Co., Ltd.
- Tel : 0086-10-84828168
- Fax : 0086-10-84828198
- Address : Beijing,Beijing,Room 803,7th Building Tianchang Yuan Olympic Media Village Beiyuan Road Chaoyang Distrcit Beijing
- Country/Region : China
- Zip : 100070
spiral drill collars
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Spiral drill collars
The drill collars are made of 4145H modified chromium-molybdenum alloy steel according to API Spec.7 and SY/T5144.All threads can be phosphated, copperized or cold worked.All threads are machined with CNC Lathed-Double-shouldered and a special thread, the max diameter of drill collar is 14 inch.
Standard size for spiral drill collars
OD | Depth of cut mm | ±25.4 Pitch mm | B Depth of cut mm | |
mm | in | |||
98.4 | 3 7/8 | 4.0±0.79 | 914 | |
101.6~111.1 | 4~4 3/8 | 4.8±0.79 | 914 | |
114.3~130.2 | 4 1/2~5 1/8 | 5.6±0.79 | 965 | |
133.4~146.1 | 5 1/4~5 3/4 | 6.4±0.79 | 1067 | |
149.2~161.9 | 5 7/8~6 3/8 | 7.1±1.59 | 1067 | |
165.1~177.8 | 6 1/2~7 | 7.9±1.59 | 1168 | |
181.0~200.0 | 7 1/8~7 7/8 | 8.7±1.59 | 1626 | 5.6±0.79 |
203.2~225.4 | 8~8 7/8 | 9.5±1.59 | 1727 | 6.4±0.79 |
228.6~250.8 | 9~9 7/8 | 10.3±2.37 | 1829 | 7.1±1.59 |
254.0~276.2 | 10~10 7/8 | 11.1±2.37 | 1930 | 7.9±1.59 |
279.4 | 11 | 11.9±2.37 | 2037 | 8.7±1.59 |
Note:spiral drill collars has spiral grooves, right hand, well distributes | ||||
spiral drill collars
