I have attached example images of drilling rigs. The top half is an ADR 400, the Yellow rectangle is suspended with chains by a red drum at the top. The chain can be styilised as ship chain. The beams in the rear of the mast have single supporting crossmembers. The yellow rectangle must have a short length of pipe (a grey rectange, with a upside doen trapizoid at the end)
There are two large hydraulic cylinders that push up the red cylinder to move the yellow rectangle, these must be shown (See page 18 of the PDF for a good image). Top top half and bottom half will be joined by a drill pipe (imaged), with styilised welds or stitches.
The bottom half of the mast tapers out and has a different style of support beam in the back (making crosses).
Wording for Rig 974 and FrankenRig should be in Mary Shelly, FrankenFont or simmilar.
The tear drop shaped yellow unit should not be displayed in the image.
If you can integrate the arm shown in front of the rig on an angle, that will add value to your entry. If it is displayed, the long rectangle can be simple and the horizontal pads coming off the sides of the arm should be shown.
ADR400 should be pressed onto the topdrive