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Contact Info
- ??:District C, No. 1 Road, Liqiao Town, Shunyi District, Beijing, Zip: 101300
- ??: Caroline
- ??:+861052997908
- ???:bjmtwk@163.com
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Kelly is the drive part of whole drill stem, it has two types, square kelly and hexagonal kelly and all of them are manufactured comfort to API Spec7-1 and SY/T6509-2000 criterion.
Our Square& Hexagonal kelly are made from AISI 4145H modified alloy bars that are quenched and tempered full length. After such heat treatment, its brinell hardness can reach 285-341. Kelly’s’end, drive cross-section and joint are all processed and tested comform to API criterion.
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Kelly size |
Length drive section |
Length overall |
Length drive section |
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LD Standard |
LD Optional |
L standard |
L optional |
DFL Across flate |
DC Across cornere |
DCC Across cornere |
RC Radlue |
RCC Radlue |
Wall thickness eccentric bore |
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63.5(2 1/2) |
11280 |
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12190 |
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63.5 |
83.3 |
82.55 |
7.9 |
41.3 |
11.43 |
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76.2(3) |
11280 |
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12190 |
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76.2 |
100.0 |
98.43 |
9.5 |
49.2 |
11.43 |
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88.9(3 1/2) |
11280 |
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12190 |
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88.9 |
115.1 |
112.7 |
12.7 |
56.4 |
11.43 |
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108.0(4 1/4) |
11280 |
15540 |
12190 |
16460 |
108.0 |
141.3 |
139.7 |
12.7 |
69.9 |
12.07 |
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108.0(4 1/4) |
11280 |
15540 |
12190 |
16460 |
108.0 |
141.3 |
139.7 |
12.7 |
69.9 |
12.07 |
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133.4(5 1/4) |
11280 |
15540 |
12190 |
16460 |
133.4 |
175.4 |
171.45 |
15.9 |
85.7 |
15.88 |
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133.4(5 1/4) |
11280 |
15540 |
12190 |
16460 |
133.4 |
175.4 |
171.45 |
15.9 |
85.7 |
15.88 |
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Upper box connection |
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LH rotary box connection |
O.D. |
Bevel diameter |
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Standard |
optional |
DU standard |
DU |
LU |
DF Standard |
DF optional |
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6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
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6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
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6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
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6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
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6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
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6 5/8 REG |
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196.9 |
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406.4 |
186.1 |
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6 5/8 REG |
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196.9 |
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406.4 |
186.1 |
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Lower pin connection |
I.D.
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Label |
DLR Outside diameter |
LL |
DF Bevel diameter |
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NC26 |
85.7 |
508 |
82.9 |
31.8 |
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NC31 |
104.8 |
508 |
100.4 |
44.5 |
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NC38 |
12.7 |
508 |
116.3 |
57.2 |
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NC46 |
158.8 |
508 |
145.3 |
71.4 |
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NC50 |
161.9 |
508 |
154.0 |
71.4 |
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5 1/2 FH |
177.8 |
508 |
170.7 |
82.6 |
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NC56 |
177.8 |
508 |
171.7 |
82 |
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| ???: | Mechanical Parts & Fabrication Services/Used General Mechanical Components |
|---|---|
| ?? ??: | |
| ???Brand: | MTWK |
| ??: | ?Brand Name:MTWK ?Place of Origin:China Model Number :MTWK-6 |
| Stock: | |
| Origin: |
