Cross-over Joint

Model:	JT2-3/8-95/8
Brand:	MDX
Origin:	Made In China
Category:	Industrial Supplies / Other Industrial Supplies
Label:	Crossover sub , bit sub , drill pipe sub
Price:	US $100 / pc
Min. Order:	10 pc

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Product Description

Description:Crossover joint acts for conversion and connection of drill stem component in petroleum ,natural gas and geology drilling work.It is used mainly for connecting of upper drill tools and lower drill tools during drilling operations. It is divided into drill string crossover joint and tubing crossover joint.There are A type (same diameter),B type (different diameter) and C type.

Bit subs are used to connect the drill bit to the next piece of equipment in the BHA. Because drill bits are "pin up" and all other drilling components are typically "pin down", the bit sub functions as a crossover for BHA attachment.

Kelly saver subs Placed between the kelly and the drill string, this sub is used to extend the life of the kelly by limiting the number of times it's pin connection is made up to the drill string. This saver sub provides a connection between the pin end of the kelly to the box end of the drill string such that the repetitious connecting of drill pipe is absorbed by this sacrificial saver sub.

Specification of Drill String Cross-over Joint

Denotation	Upper Connection Part	Lower Connection Part	Type
Kelly Cross-over Joint	Kelly	Drill pipe　joint	Ａ　or B
Drill Pipe Joint	Drill Pipe Joint	Drill Pipe Joint	Ａ　or B
Crossover Joint	Kelly	Drill Collar	Ａ　or B
Drill Collar Joint	Drill Collar	Drill Collar	Ａ　or B
Bit Joint	Drill Collar	Bit	Ａ　or B
Swivel Joint	Swivel Lower Joint	Kelly	C
Fish Joint	Kelly	Drill Pipe Joint	C
Fish Joint	Drill Pipe Joint	Fishing Tool	C

Specification of Tubing Cross- Joint

External Thread					Internal Thread
Thread Code Name	Tapering	Large End Diameter （mm）	Small End Diameter （mm）	I.D. (mm)	Thread Code Name	Tapering	Large End Diameter （mm）	Small End Diameter (mm)	I.D. (mm)
1.900TBG	1：16	48.3	47	40.3	1.900TBG	1：16	55.9	66.1	49.9
2-3/8TBG	1：16	60.3	59	40.3	2-3/8TBG	1：16	73.0	58.1	61.9
2-7/8TBG	1：16	73	70	62	2-7/8TBG	1：16	88.9	70.8	74.6
3-1/2TBG	1：16	88.9	86	76	3-1/2TBG	1：16	108.0	86.7	90.5
4TBG	1：16	101.6	98	88	4TBG	1：16	120.6	98.5	103.2
4-1/2TBG	1：16	114.3	111	100.3	4-1/2TBG	1：16	132.1	111.2	115.9
4-1/2BCSG	1：16	114.7	112	100	1.900UPTBG	1：16	63.5	51.0	54.8
1.900UPTBG	1：16	53.2	51	40.3	2-3/8UPTBG	1：16	77.8	62.8	67.5
2-3/8UPTBG	1：16	65.9	64	50.3	2-7/8UPTBG	1：16	93.2	75.5	80.2
2-7/8UPTBG	1：16	78.6	76	62	3-1/2UPTBG	1：16	114.3	92.2	96.9
3-1/2UPTBG	1：16	95.2	92	75.9	4UPTBG	1：16	127.0	104.9	109.6
4UPTBG	1：16	108.0	104	88.6	4-1/2UPTBG	1：16	141.3	117.6	122.3
4-1/2UPTBG	1：16	120.6	117	100.3