Jining Donghong Machinery Co., Ltd

Circulating Sub

Application:

The Circulating Sub is connected between wellhead pipe string and ground circulating system. When casing is running or completed, the circulating sub can be connected to provide fluid circulation.

According to the application, circulating sub is connected between Kelly and casing or between casing and a hose.

Construction:

The circulating sub during running casing is equipped with casing pin thread on one end and DP thread, DP box thread or union thread on the other.

Type of circulating sub:

Circulating Sub With Drill Pipe Thread

Circulating Sub With Hammer Union Thread

Specifications - Circulating Sub With Drill Pipe Thread

   1   Circulating Sub With Drill Pipe Thread   NC38   5 BTC          57   580

  2   Circulating Sub With Drill Pipe Thread                5 LTC

  3   Circulating Sub With Drill Pipe Thread                5 STC

  4   Circulating Sub With Drill Pipe Thread   NC38   5 1/2 BTC   57   580

  5   Circulating Sub With Drill Pipe Thread               5 1/2 LTC

  6   Circulating Sub With Drill Pipe Thread               5 1/2 STC

  7   Circulating Sub With Drill Pipe Thread   NC38   7 BTC          71   610

  8   Circulating Sub With Drill Pipe Thread               7 LTC

  9   Circulating Sub With Drill Pipe Thread               7 STC

  10   Circulating Sub With Drill Pipe Thread   NC38   9 5/8 BTC   71   610

  11   Circulating Sub With Drill Pipe Thread               9 5/8 LTC

  12   Circulating Sub With Drill Pipe Thread               9 5/8 STC

  13   Circulating Sub With Drill Pipe Thread   NC50   10 3/4 BTC   71   610

  14   Circulating Sub With Drill Pipe Thread               10 3/4 STC

  15   Circulating Sub With Drill Pipe Thread   NC50   13 3/8 BTC   71   650

  16   Circulating Sub With Drill Pipe Thread               13 3/8 STC

Specifications - Circulating Sub With Hammer union Thread

  1   Circulating Sub With Hammer union Thread   2″1502 Union   5 BTC   50.8   500

  2   Circulating Sub With Hammer union Thread   2″1502 Union   5 1/2 BTC   50.8   500

  3   Circulating Sub With Hammer union Thread   2″1502 Union   7 BTC   50.8   500

  4   Circulating Sub With Hammer union Thread                             7 LTC

  5   Circulating Sub With Hammer union Thread   2″1502 Union   9 5/8 BTC   50.8   500

  6   Circulating Sub With Hammer union Thread                             9 5/8 LTC

  7   Circulating Sub With Hammer union Thread   2″1502 Union   10 3/4 BTC   50.8   560

  8   Circulating Sub With Hammer union Thread                             10 3/4 STC

  9   Circulating Sub With Hammer union Thread   2″1502 Union   13 3/8 BTC   50.8   610

  10   Circulating Sub With Hammer union Thread                           13 3/8 BTC