INSIDE BOP

TECHNICAL SUMMARY

The Inside BOP is a critical well control tool for kick management during drill string tripping: when a kick occurs (due to suction or unexpected fluid flow), it quickly connects to the drill pipe to contain downhole pressure. Engineered for high-pressure resistance and reliable sealing, it features intuitive operation—its open-valve design allows initial fluid venting, while a locking bolt enables rapid shutoff to stop upward fluid flow.

Compatible with standard drill pipe connections (NC26 to 7 ⅝REG), it supports reverse circulation (pumping fluid downhole) to stabilize well conditions post-kick. This compact, field-friendly tool minimizes non-productive time in onshore/offshore drilling, serving as a key backup for primary well control systems.

INSIDE BOP

Thread Conn.

O.D. (in)

I.D. (in)

Length (in)

Work Pressure (Mpa)

NC26

3 1/2

1 1/4

27-28

70(35)

NC31

4 1/8

1 5/8

28-30

70(35)

NC38

4 3/4

2

30-31

70(35)

NC46

6 1/4

2 7/16

33-34

70(35)

NC50

6 5/8

2 13/16

33-34

70(35)

5 1/2FH

7

3

35-38

70(35)

6 5/8REG

8

3

38

70(35)

7 5/8REG

9 1/2

3

38

70(35)

SPECIFICATION