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Oilfield API 5 1/4" Square Kelly Drill Spare Parts

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Address: No.10 West of North Second Rig, Weiyang District, Xi’an City, China

Contact name:Sunny Lee

Xi'an TianRui Petroleum Machinery Equipment Co., Ltd.

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Oilfield API 5 1/4" Square Kelly Drill Spare Parts

Country/Region	china

Product Details

API Standard Square Kelly / Hexagonal Kelly in Oilfield

Product Overview

Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole, and is a long square or hexagonal, precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.

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.

Advantages of Square & Hexagonal Kelly

Shipped in a protective steel -cased scabbard.
Ends and drive section,IDs and connections machined and inspected to API specification.
Ultrasonic inspection is performed on all section.
Manufactured from AISI4145H-modified, fully heat-treated alloy steel with a Brinell hardness range of 285-341BHN and a minimum average Charpy impact value of 40ft-Ibs.

Technical Data. of Our Square & Hexagonal Kelly

Kelly size			63.5	76.2	88.9	108	108	133.4	133.4
Kelly size			2 1/2	3	3 1/2	4 1/4	4 1/4	5 1/4	5 1/4
Lengthdrive Section	LD Standard		11280	11280	11280	11280	11280	11280	11280
Lengthdrive Section	LD optional					15540	15540	15540	15540
Lengthoverall	L Standard		12190	12190	12190	12190	12190	12190	12190
Lengthoverall	L optional					16460	16460	16460	16460
Length Drive Section	DFL Across flate		63.5	76.2	88.9	108	108	133.4	133.4
	DC Across cornere		83.3	100	115.1	141.3	141.3	175.4	175.4
	DCC Across flate		82.55	98.43	122.7	139.7	139.7	171.45	171.45
	RC Radlue		7.9	9.5	12.7	12.7	12.7	15.9	15.9
	RCC Radlue		41.3	49.2	56.4	69.9	69.9	85.7	85.7
	Wall thickness eccentric bore		11.43	11.43	11.43	12.07	12.07	15.88	15.88
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
	Thread size and style LF	Optional	4 1/2 REG	4 1/2 REG	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
	OD	Du Optional	146.1	146.1	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	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

API standard Square Kelly for oilfield

When ordering please specify below:

Nominal size and overall length.
Kelly type (Square or hexagonal).
Upper and lower connection.

Xi'an TianRui Petroleum Machinery Equipment Company Limited is a professional manufacturer of solid control equipment and other petroleum equipment in China. We are the first-class supplier of resources market of SINOPEC and CNPC. Our products include solid control equipment, cement tools, PDC drilling bits, Wellheading tools, Mud pumps and their acceossries.

They are exported to Russia, America, Middle East, South America, Southeast Asia, Central Asia , African, Australia,Europe etc. Our company is willing to cooperate and make common progress with friends at home and abroad with first-class products, first-class service and reasonable prices

Competitive Advantages

1. We offer high quality products at competitive price.
2. Shortest delivery time.
3. Flexible payment terms.
4. Timely after-sale service.
5. Most of our equipment can be replaceable with international brands.
6. Our products have been exported to Argentina, Egypt, US, Australia, Romania, Pakistan, Dubai, Abu Dhabi, Iran, India, Indonesia, Vietnam, Malaysia and many other countries.