Simultaneous lowering device and lowering method for drilling multiple casings

Abstract

The invention discloses a simultaneous lowering device and lowering method for drilling multi-channel casings, comprising a support surface, the upper end of the support surface is fixed to a drilling tower, the drilling tower is provided with a hanging pan, and the lower end of the hanging pan is A traveling crown is fixedly connected, and a plurality of upper sleeves are arranged under the traveling crown, and lower ends of the plurality of upper sleeves are welded with lower sleeves, and a plurality of upper sleeves and lower pipes Fixing clips are provided on the outer side of the sleeve near the upper end, and safety clips are provided on the outer sides of the plurality of upper and lower sleeves above the fixing clips. In the present invention, the designed load-bearing chassis, fixing clips, safety clips, and isolation steel plates have simple manufacturing process and simple structure, and the hoisting device that comes with the drilling rig is used to move the crane and the hanging pan, and to use it between the lower casings. The method of feeding the casing with isolation steel plate reinforcement, fixing clips and safety clips meets the requirements of the site, and can achieve the purpose of simultaneously placing multiple casings in the drill hole, which is convenient and reliable to use.

Description

technical field [0001] The invention relates to the technical field of laying multiple casings for exploration drilling, in particular to a device for simultaneously laying multiple casings for drilling. Background technique [0002] In drilling construction, according to the technical requirements, it is necessary to place multiple casings in the borehole at the same time. Each casing is used for different purposes, such as casings are inserted separately. In the process of running into other casings, because the casings that have been run in are in the borehole, the casings that are run in will scrape against the casing and the well wall and rotate by themselves, so they cannot go down to the predetermined position. When the casing is run in, threaded connection or welding is generally used. The lifting method is clamped with a threaded head or a splint, and pulled with a wire rope. Contents of the invention [0003] The purpose of the present invention is to solve the...

AI Technical Summary

Problems solved by technology

[0002] In drilling construction, according to the technical requirements, it is necessary to place multiple casings in the borehole at the same time. Each casing is used for different purposes, such as casings are inserted separately. In the process of running other casings, since the casings have already been run in the borehole, the casings run in again will scrape against the casing and the well wall and rotate by themselves, and cannot be run to the predetermined position.

Images