Vertical compound tunneling system

Abstract

The invention discloses a vertical combined type tunneling system. The vertical combined type tunneling system comprises a drilling rig chassis (103), a manipulator (101) is mounted on the drilling rig chassis (103), a drill rod moving device (102) is located on the upper part of the drilling rig chassis (103), two sealing platforms (104) are slidably disposed on the drilling rig chassis (103), and a drill pipe assembly (105) is vertically arranged between the two sealing platforms (104) in a clamped mode. A portal frame (106) is mounted on the drilling rig chassis (103), and a power head (108) on the portal frame (106) drives the drill rod assembly (105); and the bottom of the portal frame (106) is hinged to the drilling rig chassis (103) through a hinge pin, and both ends of a turnover cylinder (107) are separately hinged to the portal frame (106) and the drilling rig chassis (103). The vertical combined type tunneling system has the advantages of higher tunneling efficiency, bettereffect, low overall construction cost, high construction efficiency and being capable of constructing under severe weather conditions.

Description

technical field [0001] The invention relates to a tunneling system, in particular to a vertical composite tunneling system applied to drilling operations in a marine operation environment, and belongs to the technical field of offshore wind power construction. Background technique [0002] At present, in the construction of offshore wind power, the large-diameter single-pile rock-socketed drilling method carried out by the vertical compound tunneling system has been widely used; for the vertical compound tunneling system, the factors that determine its performance are: ① Applied ② The torque provided to the drill bit ③ The speed of the drilling tool ④ The maximum lifting capacity ⑤ The efficiency of removing drilling slag from the working face; [0003] Nowadays, in the actual use process, it is found that the performance of conventional tunneling systems has the following shortcomings: ① Insufficient WOB, WOB ≤ 150T; ② Insufficient torque, torque ≤ 1000KN.m; ③ Low slag disc...

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Problems solved by technology

[0003] Nowadays, in the actual use process, it is found that the performance of conventional tunneling systems has the following shortcomings: ① Insufficient WOB, WOB ≤ 150T; ② Insufficient torque, torque ≤ 1000KN.m; ③ Low slag discharge efficiency, only one suction port;

[0005] Moreover, conventional rock-socketed drilling equipment disassembles and assembles drill pipes by means of cranes and manual operations, which is not only inefficient, but also the assembly effect is not satisfactory; at the same time, in conventional rock-socketed drilling equipment, the The poles are usually piled up on the deck platform in a horizontal manner. When hoisting, they need to be turned over to the vertical state before they can be disassembled, which undoubtedly further reduces their construction efficiency; and the safety performance of the horizontal stacking method is not good, especially in In the case of severe wind and waves, the drill pipe is prone to rolling, which affects its construction progress;

[0006] At the same time, conventional drilling rigs use the principle of decompression drilling to carry out drilling work, that is, the drilling pressure on the rock surface of the drill bit is completely generated by its own weight, and the drilling pressure is often insufficient; conventional drilling rigs use multiple hydraulic motors to provide torque for the drill bit. The torque provided by it is generally low, which affects the speed of rock-socketed drilling;

[0007] In addition, for the structure of the drill bit on the drill pipe, conventional drill bits use a slag outlet, and in actual use, it is found that there are problems such as large tool wear and low rock breaking efficiency; because of the relationship between a slag outlet, the mud travels to The distance of the slag discharge port of the cutter head is longer, which increases the ineffective crushing of the drill bit by the drill bit, resulting in increased tool wear and shortened tool life; at the same time, conventional drill bits need to be replaced with different tools when facing different geological environments, such as A hob is required for the rock layer, and a scraper is required for the clay layer. Once encountering a stratum with unknown geological conditions, it is necessary to judge the geological structure according to the drilling parameters and replace the cutting tool in a timely manner, which seriously affects the construction efficiency.

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