Double-distance propelling unit for subsea drilling machine

Abstract

The invention discloses a double-distance propelling unit for a subsea drilling machine. The propelling unit comprises a drilling machine mast rack, a propelling cylinder, movable pulleys, fixed pulleys, steel wire ropes and a steel wire rope tensioning adjusting mechanism, wherein the propelling cylinder is fixedly arranged inside the drilling machine mast rack, a propelling ear pendant is fixed at the top of a piston rod of the propelling cylinder, two movable pulley shafts are respectively arranged in pulley shaft mounting holes formed in the propelling ear pendants in a sleeved mode, the movable pulleys respectively sleeve two ends of the movable pulley shafts, the fixed pulleys are respectively arranged at the upper part and the lower part of two sides of the drilling machine mast rack, a vertical sliding rail is arranged at the front of the drilling machine mast rack, a drilling power head is fixed on the vertical sliding rail by a propelling sliding block, and two ends of each of the two steel wire ropes fixed by bypassing the movable pulleys, the fixed pulleys and the drilling power head are fixedly connected with the steel wire rope tensioning adjusting mechanism. According to the invention, the drilling power head can slide up and down along the vertical sliding rail under the driving of the propelling cylinder, and because the combination of the movable pulleys and the fixedly pulleys is adopted, the displacement of the drilling power head is two times of that of the stroke of the propelling cylinder.

Description

technical field [0001] The invention relates to a seabed drilling machine, in particular to a double-range propulsion device for a seabed drilling machine. Background technique [0002] The submarine drilling rig is one of the important equipment necessary to carry out marine geological and environmental scientific research, conduct seabed resource exploration and submarine engineering geological survey, and obtain accurate geological data of the seabed. The whole process of the rear deck needs to be completed with the aid of the A-frame of the ship. Due to the limitation of the height and width of the A-frame of the ship and the bearing capacity of the armored umbilical cable, the overall structure of the subsea drilling rig should be as compact as possible during the design process and the quality of the drilling rig Should be as lightweight as possible. The stroke of the drilling power head of the subsea drilling rig directly affects the drilling depth capability of a si...

AI Technical Summary

Problems solved by technology

The stroke of the drilling power head of the subsea drilling rig directly affects the drilling depth capability of a single drill pipe of the subsea drilling rig (that is, the design length of a single drill pipe). , the stroke of the propulsion cylinder must be doubled, which requires a corresponding increase in the height of the subsea drilling rig, which not only increases the quality of the propulsion cylinder, the rig frame and other components, but also increases the installation space required for the propulsion cylinder, which is different from The requirements that the overall structure of the drilling rig should be as compact as possible and the quality of the drilling rig should be as light as possible have serious conflicts

Images