collapsible derrick

Abstract

The invention belongs to the technical field of petroleum equipment, and discloses a derrick that can be closed. It includes a derrick body, which is divided into a left section and a right section. Ear plates, the two sets of connecting ear plates are connected to each other through outer pins and inner pins respectively, the bottom of the other end of the left section and the right section are respectively provided with fixed ear plates, and there are pin holes on the fixed ear plates, pull out the outer pins The rear left section and right section can rotate horizontally around the inner pins. When the pin holes on the fixing lugs coincide, insert the outer pins to fix them. The derrick body is closed to form a quadrilateral with four sides closed. The present invention changes the matching gap between the connecting lug plate and the variable diameter pin through the difference in the installation position of the positioning block on the inner pin, so that the connecting lug plate rotates, and the left section and the right section of the derrick are closed, thereby reducing the volume of the derrick , which not only meets the requirements of railway transportation, but also improves the efficiency of on-site assembly of the derrick.

Description

technical field [0001] The invention belongs to the technical field of petroleum equipment, in particular to a foldable derrick that can reduce the transport volume and can be quickly installed. Background technique [0002] At present, the main structure of the derrick used in drilling operations is composed of left and right sheet frames and connecting ear plates. There are two design forms of the connecting ear plates: one is detachable, and the other is that the connecting ear plates and the sheet frame are welded as a whole. [0003] For the detachable form of the connecting ear plate, each component is packaged and transported separately when the derrick is transported. Not only are there many transport units, but also the installation time to the site is long and labor-intensive. For the derrick form in which the connecting lug plate and the sheet frame are welded together, although the overall transportation can be realized and the on-site installation time is reduce...

AI Technical Summary

Problems solved by technology

For the derrick form in which the connecting lug plate and the sheet frame are welded together, although the overall transportation can be realized and the on-site installation time is reduced, due to the working performance of the derrick and the installation requirements of the accessories, the overall size of the derrick is relatively large, exceeding the limit of railway transportation The size increases a lot of transportation costs and even makes it impossible to realize railway transportation, so that the scope of use of this type of derrick is greatly limited

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