Quarter Drill Pipe
Telephone Bargaining
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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| Industry Category | Mechanical-Parts-Fabrication-Services/Used-General-Mechanical-Components |
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| Product Category | |
| Brand: | MTWK |
| Spec: | Brand Name:MTWK Place of Origin:China Model Number :MTWK-6 |
| Stock: | |
| Origin: |