KINGWELL Kelly Features & Benefits:
 
Kelly is the drive part of whole drill string, it transmit the torsional energy from the rotary table to the bit in the bottom of the hole.
KINGWELL can produce square and hexagonal Kelly as per API standard. 
 
Size: 2-1/2"-6"
Processing Type: Forging
Kelly type: square or hexagonal
Box connection type: 6 5/8 REG
Material:AISI 4142H-4145H forged or rolled alloy steel
 
KINGWELL Kelly Technical Data:
 
 

Kelly size			76.2	88.9	108	133.4	133.4	152.4	152.4
			3	3 1/2	4 1/4	5 1/4	5 1/4	6	6
Length drive  Section	LD Standard		11280	11280	11280	11280	11280	11280	11280
	LD optional				15540	15540	15540	15540	15540
Length overall	L Standard		12190	12190	12190	12190	12190	12190	12190
	L optional				16460	16460	16460	16460	16460
Length Drive Section	DFL Across flate		76.2	88.9	108	133.4	133.4	152.4	152.4
	DC Across cornere		85.7	100.8	122.2	151.6	175.4	173	173
	DCC Across flate		85.73	100	121.44	149.86	171.45	173.02	173.02
	RC Radlue		6.4	6.4	9.9	9.9	15.9	9.5	9.5
	RCC Radlue		42.9	50	60.7	75	85.7	86.5	86.5
	Wall thickness  eccentric bore		12.1	13.3	15.9	15.9	15.88	15.9	15.9
Upper box connection	Thread size and style LF	Standard	6 5/8 REG	6 5/8 REG	6 5/8 REG	6 5/8 REG	6 5/8 REG	6 5/8 REG	6 5/8 REG
		Optional	4 1/2 REG	4 1/2 REG	4 1/2 REG
	OD	Du Standard	196.9	196.9	196.9	196.9	196.9	196.9	196.9
		Du Optional	146.1	146.1	146.1
	Bevel  diameter	Lu	406.4	406.4	406.4	406.4	406.4	406.4	406.4
		DF Standard	186.1	186.1	186.1	186.1	186.1	186.1	186.1
		DF Optional	134.5	134.5	134.5
Lower pin connection	Label		NC26	NC31	NC38	NC46	NC50	5 1/2 FH	NC56
	Outsize diameter		85.7	104.8	120.7	158.8	161.9	177.8	177.8
	LL		508	508	508	508	508	508	508
	DF Bevel diameter		82.9	100.4	116.3	145.3	154	170.7	171.1
Inside diameter			31.8	44.5	57.2	71.4	71.4	82.6	82.6