Devices, systems, and methods for wellbore operations

A method for conveying wellbore tools into a wellbore, comprising:

• deploying an anchor, a pulley collar, and a cable into the wellbore via at least one of a drill string, a wellbore tractor, a torpedo, or a pump mechanism;
• releasing the anchor from the at least one of the drill string or the wellbore tractor;
• securing the anchor within the wellbore to anchor the pulley collar in the wellbore;
• looping the cable about the pulley collar;
• and
• pulling the cable to a surface of the wellbore to form a looped cable in the wellbore.

A tractor and logging system for wellbore operations, comprising:

• a tractor configured to travel down a wellbore, the tractor defining a tractor body;
• a plurality of modular compartments housing one or more wellbore tools, each modular compartment disposed in the tractor body and configured to be selectively deployed from the tractor;
• and
• a plurality of couplers configured to releasably couple each modular compartment to the tractor body,
• wherein the plurality of modular compartments are configured to be retrieved to a surface of the wellbore independently of the tractor.