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Mudanjiang Petroleum Tool.s Co.,Ltd

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Circulating Sub

Payment Terms:	T/T,L/C,D/P

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Product Details
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Basic Info.

Brand Name: MSG
drilling tools: 1
Place of Origin: Heilongjiang
Min.Order: 1 Piece/Pieces
Means of Transport: ocean land airline

Supply Capacity

Packing:wooden cases

Circulating Sub

The Circulating sub is a special tool for circulating drilling fluid when running in casing on the way or finishing running casing downhole. According to actual needs, there are circulating sub with casing thread and circulating sub with union thread (All sizes)

Construction

The Circulating Sub consists of upper thread that connects with drill pipe, buttress thread lower end that links with casing coupling. It is gone through the process of heat treatmentwith high quality alloy steel, and become much stronge and more reliable in use.

drilling pipe box thread	casing thread	borehole	Length (mm)
NC38	5″BTC	57	500
	5″LTC
	5″STC
NC38	5″BTC	57	580
	5-1/2″LTC
	5-1/2″STC
NC50	7″BTC	71	600
	7″LTC
	7″STC
NC50	9-5/8″BTC	71	620
	9-5/8″LTC
	9-5/8″STC
NC50	10-3/4″BTC	71	670
	10-3/4″LTC
	10-3/4″STC
NC50	13-3/8″BTC	71	670
	13-3/8″LTC
	13-3/8″STC