A rotary sealing core lifting mechanism
A rotary sealing and core-lifting technology, which is used in the extraction of undisturbed core devices, drill pipes, casings, etc., can solve problems such as changes in the internal core five-guarantee state, irreversible damage to equipment, and instability of the core-lifting mechanism. Stable and safe control to ensure stable operation effect
Active Publication Date: 2022-04-15
SICHUAN UNIV
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Problems solved by technology
[0003] However, the core lifting mechanism in the prior art is unstable during operation, which cannot ensure reliable guarantee and stable operation of the deep in-situ coring equipment in the deep engineering environment and simulated test environment, and may even make the internal rock The "five guarantees" state of the core changes, and even causes irreversible damage to the entire device
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[0014] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0015] Such as Figure 1 to Figure 5 As shown, the rotary sealing core lifting mechanism of this program includes a drill rod 2, a drill rod cavity is arranged in the drill rod 2, the upper and lower ends of the drill rod cavity are opened, and a rotary piston rod 3 is arranged in the drill rod cavity, and the rotary piston rod 3 is Hollow structure, the upper end of the rotary piston rod 3 is connected to the drill pipe ca...
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The invention discloses a rotary sealing core lifting mechanism, which comprises a drill rod, a drill rod cavity is arranged in the drill rod, the upper and lower ends of the drill rod cavity are opened, a rotary piston rod is arranged in the drill rod cavity, and the upper end of the rotary piston rod passes through the The piston is connected with the drill pipe cavity; a rotary rod is arranged in the rotary piston rod, and the rotary rod is inserted into the rotary piston rod to connect with the rotary rod joint, and the rotary rod joint is slidingly connected with the inner wall of the rotary piston rod, and the rotary rod joint is connected with the inner wall of the rotary piston rod. A rotation limiting mechanism is arranged between the inner walls, the lower end of the rotating piston rod is connected to the piston rod joint, the lower end of the rotating rod joint is connected to the core lifting rod, and the core lifting rod passes through the piston rod joint to connect with the drill pipe cavity joint. This program is used in the laboratory to simulate deep drilling of cores. The entire core lifting mechanism provides downward drilling pressure and upward core lifting pressure through the oil pressure difference of hydraulic oil, which can ensure the stable operation of the mechanism and realize the fidelity core removal device. Stable and secure control of the operating environment.
Description
technical field [0001] The invention relates to the technical field of drilling, in particular to a rotary sealing core lifting mechanism. Background technique [0002] The in-situ rock mechanical behavior of different depths of rock formations is the leading science and important theoretical basis for deep drilling, deep resource development and utilization, and earth application science. The core and key is how to obtain "in-situ cores" under deep environmental conditions. ", and real-time loading test and analysis were carried out under the in-situ fidelity state. However, when obtaining "in-situ core", it is necessary to carry out heat preservation, pressure maintenance, moisture retention, quality preservation, and gloss preservation ("five guarantees") while drilling, which puts strict requirements on the core lifting mechanism of deep coring equipment. [0003] However, the core lifting mechanism in the prior art is unstable during operation, which cannot ensure reli...
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IPC IPC(8): E21B25/00E21B25/10E21B17/02
CPCE21B25/00E21B25/10E21B17/02
Inventor 张茹谢和平张泽天李佳南黄伟李怡航陈领高明忠张志龙杨阳任利
Owner SICHUAN UNIV