Ball check valves
The ball check valve is sealed by hard contact between metals, and is used to prevent the bottom hole pressure from channeling up when the string is lowered or recovered, so as to achieve the purpose of protecting the wellhead equipment. The spring is always in a compressed state to ensure that the ball and the sealing surface are always in place, and the bottom pressure does not channel. When it is necessary to inject liquid into the well, only the surface pressure difference is 1-3MPa, and the channel will be opened.
Classification:
Detailed Description
The ball check valve is sealed by hard contact between metals, and is used to prevent the bottom hole pressure from channeling up when the string is lowered or recovered, so as to achieve the purpose of protecting the wellhead equipment. The spring is always in a compressed state to ensure that the ball and the sealing surface are always in place, and the bottom pressure does not channel. When it is necessary to inject liquid into the well, only the surface pressure difference is 1-3MPa, and the channel will be opened.
●Large fluid passage;
●Simple construction and easy maintenance;
● Metal contact sealing.
|
performance parameters |
||
|
tool outer diameter |
minimum inner diameter |
thread specifications for the upper and lower fittings |
|
（in） |
(in) |
|
|
1.687” |
0.750” |
1”AMMT |
|
2.125” |
1.000” |
1.5”AMMT |
|
2.250” |
1.031” |
|
|
2.375” |
1.031” |
|
|
2.875” |
1.375” |
23/8”PAC |
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