Kelly bar

Kelly bar is made of AISI4145H alloy steel in accordance with API Specifications and SY/T6509 Standards through integral forging with precision forging machine and integral thermal treatment with intermediate-frequency or 20 m horizontal resistance furnace, which achieves excellent mechanical properties within the full length. Threads can be processed with cold rolling, coppering or phosphating.

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Kelly bar

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Kelly bar

● Dimensions of hexagonal kelly

Specification Kelly size		Length drivesection		Length overall		Length drivesection
Specification Kelly size		LD Standard	LD Optional	L Standard	L Optional	DFL Across flate	DC Across cornere	DCC Across cornere	RC Radlue	RCC Radlue	t Wall Thickness Eccentric bore
76.2	3	11280		12190		76.2	85.7	85.73	6.4	42.9	12.1
88.9	31/2	11280		12190		88.9	100.8	100.0	6.4	50.0	13.3
108.0	41/4	11280	15540	12190	16460	108.0	122.2	121.44	9.9	60.7	15.9
133.4	51/4	11280	15540	12190	16460	133.4	151.6	149.86	9.9	75.0	15.9
133.4	51/4	11280	15540	12190	16460	133.4	175.4	171.45	15.9	85.7	15.88
152.4	6	11280	15540	12190	16460	152.4	173.0	173.02	9.5	86.5	15.9
152.4	6	11280	15540	12190	16460	152.4	173.0	173.02	9.5	86.5	15.9

Upper box connection							Lower pin connection				Inside diameter
Thread specification and type		OD		BevelDiameter			Label	DLR Out diameter	LL	DF BevelDiameter
Standard	Optional	DU Standard	DU Optional	LU	DF Standard	DF Optional	Label	DLR Out diameter	LL	DF BevelDiameter
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC26	85.7	508	82.9	31.8
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC31	104.8	508	100.4	44.5
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC38	120.7	508	116.3	57.2
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC46	158.8	508	145.3	71.4
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC50	161.9	508	154.0	71.4
65/8REG		196.9		406.4	186.1		51/2FH	177.8	508	170.7	82.6
65/8REG		196.9		406.4	186.1		NC56	177.8	508	171.1	82.6

● Dimensions of square kelly

Kelly size		Length drivesection		Length overall		Length drivesection
Kelly size		LD Standard	LD Optional	L Standard	L Optional	DFL Across flate	DC Across cornere	DCC Across cornere	RC Radlue	RCC Radlue	t Wall Thickness Eccentric bore
63.5	21/2	11280		12190		63.5	88.3	82.55	7.9	41.3	11.43
76.2	3	11280		12190		76.2	100.0	98.43	9.5	49.2	11.43
88.9	31/2	11280		12190		88.9	115.1	112.7	12.7	56.4	11.43
108.0	41/4	11280	15540	12190	16460	108.0	141.3	139.7	12.7	69.9	12.07
108.0	41/4	11280	15540	12190	16460	108.0	141.3	139.7	12.7	69.9	12.07
133.4	51/4	11280	15540	12190	16460	133.4	175.4	171.45	15.9	85.7	15.88
133.4	51/4	11280	15540	12190	16460	133.4	175.4	171.45	15.9	85.7	15.88

Upper box connection							Lower pin connection				Inside diameter
Thread specification and type		OD		BevelDiameter			Label	DLR Out diameter	LL	DF BevelDiameter
Standard	Optional	DU Standard	DU Optional	LU	DF Standard	DF Optional	Label	DLR Out diameter	LL	DF BevelDiameter
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC26	85.7	508	82.9	31.8
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC31	104.8	508	100.4	44.5
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC38	12.7	508	116.3	57.2
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC46	158.8	508	145.3	71.4
65/8REG	41/2REG	196.9	146.1	406.4	186.1	134.5	NC50	161.9	508	154.0	71.4
65/8REG		196.9		406.4	186.1		51/2FH	177.8	508	170.7	82.6
65/8REG		196.9		406.4	186.1		NC56	177.8	508	171.1	82.6

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Welcome to fill in the following form, complete your product requirements, contact information and other information, we will quickly feedback your purchase consultation. You can also contact us through online consultation, e-mail , and our customer service team will further provide you with excellent service.