Circulating sub

Product Detail

Circulating sub

The circulating sub is connected between wellhead pipe string and ground circulating system. When casing is running or finished running, the circulating sub is connected to make fluid circulation. According to the application, the circulating sub is connected between Kelly and casing or between casing and hose. The former is used for fluid circulation during connecting of casing. The later generally is used after connecting of casing.

Technical Features

l   Its upper end is drill pipe box or union, the nether end is casing pin. It is a crossover(X/O) with hollow inside.

l   Main body are made from AISI4145H alloy steel.

 Technical parameter

Thread/ Model			I.D. (mm)	Length (mm)
Drill pipe box connection	Casing thread	Product Code
C38	5BTC	J030701	57	580
	J030702
	J030703
NC38	5 1/2BTC	J030801	57	580
	J030802
	J030803
NC50	7BTC	J031201	71	610
	J031202
	J031203
NC50	9 5/8BTC	J031801	71	610
	J031802
	J031803
NC50	10 3/4BTC	J031901	71	610
	J031902
NC50	13 3/8BTC	J032001	71	650
	13 3/8STC	J032002

 

 

Thread/ Model			I.D. (mm)	Length (mm)
Union thread	Casing thread	Product Code
2″1502Union	5BTC	J040701	50.8	500
2″1502Union	5 1/2BTC	J040801	50.8	500
2″1502Union	7BTC	J041201	50.8	500
	7LTC	J041202
2″1502Union	9 5/8BTC	J041801	50.8	500
	9 5/8LTC	J041802
2″1502Union	10 3/4BTC	J041901	50.8	560
	10 3/4STC	J041902
2″1502Union	13 3/8BTC	J042001	50.8	610
	13 3/8BTC	J042002