Patent ID: 9163462
Filing Date: 2015-10-20
Classification: E21B

Abstract:
1. A method, comprising: positioning a lower end of a substantially horizontally oriented first mast section of a bi-directionally raisable drilling rig mast adjacent to an upper end of a substantially horizontally oriented second mast section of said bi-directionally raisable drilling rig mast, said upper end of said second mast section being oriented in a first direction relative to a drilling rig substructure; engaging a first lower hook engagement connection proximate said lower end of said first mast section with a first upper hook connection proximate said upper end of said second mast section, said first lower hook engagement connection and said first upper hook connection being positioned on respective first sides of said first and second mast sections; after engaging said first lower hook engagement connection with said first upper hook connection, engaging a second lower hook engagement connection proximate said lower end of said first mast section with a second upper hook connection proximate said upper end of said second mast section, said second lower hook engagement connection and said second upper hook connection being positioned on respective second sides of said first and second mast sections that are opposite of said respective first sides; and after engaging said first and second lower hook engagement connections with said respective first and second upper hook connections, raising said assembled bi-directionally raisable drilling rig mast from a substantially horizontal orientation to a substantially vertical orientation for drilling operations.