Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Kelly valves (kelly cocks)<br />
An upper kelly valve is installed between the<br />
swivel and the kelly.<br />
A lower kelly valve is installed imediatelly<br />
below the kelly.<br />
Upper kelly has on the top the left-hand screw<br />
to avoid un<strong>control</strong>led screw of, and on the<br />
bottom there will be a right-hand screw.
Hooray! Your file is uploaded and ready to be published.
Saved successfully!
Ooh no, something went wrong!
Change language