Prior to “Stage 2” of a cement job, the blocks were raised above the casing stump and locked into position using the Auxiliary Brake with the elevators remaining attached; the stump was approximately 13 feet (4m) above the rig floor and the brake was not chained down During the cement job, the motorman proceeded to rig out part of the rig and disconnected the glycol system for the auxiliary brake. This action caused the air pressure to dissipate causing the Auxiliary brake to become disengaged. The blocks started to come down, hit the collar of the casing and laid over into the derrick.
This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.