SHANDONG SAIGAO GROUP CORPORATION
SHANDONG SAIGAO GROUP CORPORATION

Circulating Sub

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 . The circulating sub produced in our company belongs to the former.



Features:

The circulation joint is connected between the wellhead string and the ground circulation system, and the circulation joint can be circulated to the drilling fluid when the casing is in or out of the casing. According to the application, it can be divided into a casing one drill pipe circulation joint and a casing one water hose circulation joint. The casing one drill pipe circulation joint is used when the drilling fluid needs to be circulated in the middle of the casing, and the casing one water hose circulation joint is used for Use after the casing is finished.


The circulating joint used in the middle of the casing is provided with a male thread of the casing at one end and a joint of the female thread of the drill pipe at the other end. The circulating joint for the casing is completed, one end is a male thread of the casing, and the other end is a two-way joint which is short-circuited.


Technical Specification:.


Specifications - Circulating Sub Wtth Drill Pipe Thread
Thread/ ModelI・D. (m)Length (m)
Drill pipe box connect ionCasing threadProduct Code
NC385 BTCJ03070157580
5LTCJ030702
5STCJ030703
NC385 1/2 BTCJ03080157580
5 1/2 LTCJ030802
5 1/2 STCJ030803
NC507 BTCJ03120171610
7 LTCJ031202
7 STCJ031203
NC509 5/8 BTCJ03180171610
9 5/8 LTCJ031802
9 5/8 STCJ031803
NC5010 3/4 BTCJ03190171610
10 3/4 STCJ031902
NC5013 3/8 BTCJ03200171650
13 3/8 STCJ032002



Specifications - Circulating Sub With Hammer union Thread
Thread/ ModelLD. (nm)Length (■m)
brill pipe Box connectionCasing threadProducl Code
2“ 502 Union5 BTCJ04070150.8500
2-1502 Union5 1/2 BTCJ04080150.8500
2"1502 Union7 BTCJ04120150.8500
7LTCJ041202
2"1502 Union9 5/8 BTCJ041801
500
9 5/8LTCJ041802
2"1502 Union10 3/4 BTCJ04190150.8560
10 3/4 STCJ041902
2"1502 Union13 3/8 BTCJ042001
610
13 3/8 STCJ042002


PRODUCT
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    Zhongrun Century Center, No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China

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