Patent ID: 7497052

Claim:
A scissors type vertical elevated substructure comprising: a base; a surface connected to the base by a plurality of legs, each of the plurality of legs having a node and one end connected to one of the base and the surface; a connecting rod connecting two nodes of the plurality of legs such that the plurality of legs are articulated, the plurality of legs and connecting rod form double parallelograms that are mirror images of each other; a guide device on the base; a pair of lifting sheaves on the surface; a sheave on a top of the guide device; a lifting wireline having a first end connected to one of the nodes of the plurality of legs and a second end that first runs around one of the pair of lifting sheaves, second runs around the sheave on the top of the guide device, and third runs around the sheave on the top of the guide device and connects to a draw works which is adapted to pull the lifting wireline; a guide pulley on the second surface; a vertical guide rail on the guide device, the guide pulley sitting in the guide rail; a first support rod having one end fixed to the plurality of legs and the other end fixed to the base; and a second support rod having one end fixed to the plurality of legs and the other end fixed to the surface.