CIRCULATING SUB
The circulating sub is one specialized tool for circulating drilling fluid when running in casing on the way or
finishing running casing down hole. According to actual need, there are circulating sub with casing thread and
circulating sub with union thread.
Technical Specification of Circulating Sub.
Sub Model
I.D.
(mm)
Thread
Overall
Length
(mm)
Sub Model
I.D.
(mm)
Thread
Overall
Length
(mm)
Drill Pipe
Box
Casing
Thread
Drill Pipe
Box
Casing
Thread
JD-CS
88.9 X 139.7
57
NC38
5-1/2
580
JD-CS
114.3 X 244.5
71
NC50
9-5/8
620
JD-CS
114.3 X 139.7
71
NC50
5-1/2
580
JD-CS
114.3 X 273.0
71
NC50
10-3/4
670
JD-CS
114.3 X 177.8
71
NC50
7
600
JD-CS
114.3 X 339.7
71
NC50
13-3/8
670
JD-CS
114.3 X 193.7
71
NC50
7-5/8
600
JD-CS
114.3 X 508
71
NC50
20
675
JD-CS
114.3 X 219.1
71
NC50
8-5/8
600
Circulating Sub
Address:
No.7, Aucma Street, Laishan District, Yantai, Shandong, P.R.China 264003
Tel:
+86-535-6723520 6723201
Fax:
+86-535-6723171 6723272
E-mail:
petroleum@jereh.com; cnjereh@gmail.com
Website:
Http://www.jereh-oilfield.com