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ACE-OCTG International Partnership Ltd.
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DRILLING EQUIPMENT
ROTARY KELLYS
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The kellys are made from AISI 4145H modified alloy bars which are quenched and tempered full lengthA hardness range of 285 to 341 BHN and a minimum impact value of 40 ft.-lbs. are maintained one below the surface at room temperature. All ends and center drive sections are machined. The kellys are precision-trepanned to provide true bores. The kellys are drifted to API specifications, all connections are precision-machined and quality-assurance inspected.
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When ordering or requesting quotations on kellys, please specify:
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Hexagonal or Square Kelly.
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Nominal Size
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Bore
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Size and type of Top connection
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Size and type of Bottom connection
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Top upset OD
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Bottom upset OD
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Plain shipping scabbards are available.
SQUARE KELLYS
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Nom.
Size
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Available Lengths
(ft.)
(L)
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Top Upset
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Bottom Upset
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Bore
(A)
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Drive Section
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Approx. wt. per 40 ft. (lbs)
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API Box Thread Left Hand
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OD
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Right Hand Connect-ion
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OD
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Across
Corners
(B)
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Across
Flats
(C)
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3½
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40, 42, 46
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6⅝ Reg.
4½ Reg.
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7¾
5¾
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NC 38
(3½ IF)
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4¾
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2¼
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4.437
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3½
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1320
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4¼
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40, 42, 46
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6⅝ Reg.
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7¾
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NC 46
(4 IF)
NC 50
(4½ IF)
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6-6⅜
6⅛-6⅜
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213∕16
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5.500
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4¼
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1820
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5¼
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40, 42, 46, 54
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6⅝ Reg.
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7¾
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NC 56 or 5½ FH
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7
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3
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6.750
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5¼
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2780
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6
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40, 42, 46
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6⅝ Reg.
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7¾
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6⅝ Reg.
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7¾
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3
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7.625
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6
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3700
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All dimensions are given in inches unless otherwise stated
Short boreback standard in top box.
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HEXAGONAL KELLYS
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Nominal Size
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Available Lengths
(ft.)
(L)
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Top Upset
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Bottom Upset
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Bore
(A)
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Drive Section
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Approx wt. per 40 ft. (lbs)
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API Box Thread Left Hand
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OD
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Right Hand Connect-ion
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OD
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Across
Corners
(B)
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Across
Flats
(C)
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3½
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40, 42, 46
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6⅝ Reg.
4½ Reg.
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7¾
5¾
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NC 31 (2⅞ IF)
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4⅛
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1¾
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3.937
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3½
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1320
1200
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4¼
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40, 42, 46
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6⅝ Reg.
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7¾
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NC 38 (3½ IF)
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4¾
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2¼
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4.781
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4¼
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1740
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5¼
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40, 42, 46, 54
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6⅝ Reg.
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7¾
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NC 46
(4 IF)
NC 50
(4½ IF)
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6 - 6⅜
6⅛-6⅜
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213∕16
3
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5.900
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5¼
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2550
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6
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40, 42, 46
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6⅝ Reg.
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7¾
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NC 56 or 5½ FH
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7
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3
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6.812
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6
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3040
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