Crushing system for large-size natural gas hydrate rock samples

Patent metadata

Field	Value
Publication number	US-11465152-B2
Application number	US-201816604100-A
Country	US
Kind code	B2
Filing date	Nov 20, 2018
Priority date	May 25, 2018
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A crushing system for large-size natural gas hydrate rock samples, which mainly includes a crushing and stirring control subsystem, crushing and stirring execution subsystem and hydrate preparation subsystem. Full automatic control to parameter acquisition and experimental process is achieved by utilizing modern automation technology, including the function of automatically crushing the large-size natural gas hydrate rock samples and also monitoring, collecting and storing the drilling pressure, the torque and the internal furnace pressure and temperature parameters during the crushing process in real time, to provide reliable guarantee for the follow-up researches on crushing mechanism, crushing efficiency, drilling parameter optimization, rock crushing ability evaluation of a crushing tool and the like of the large-size natural gas hydrate rock samples and necessary experimental verification means for optimization of on-site exploiting construction conditions of natural gas hydrate.

First claim

The invention claimed is:

1. A crushing system for large-size natural gas hydrate rock samples, comprising a crushing and stirring control subsystem, a crushing and stirring execution subsystem and a hydrate preparation subsystem, wherein
the crushing and stirring control system comprises a hydraulic station, a control cabinet, and a computer;
the crushing and stirring execution subsystem comprises a hydraulic cylinder, a hydraulic telescopic rod, a barrel body, a connecting block, a slider, an electric motor fixing frame, an electric motor, a speed reducer, a coupling, an axial supporting frame, a bearing pressure plate, a thrust bearing, a power short shaft, a universal joint, a torsion-tension-pressure transmitter upper connecting flange, a torsion-tension-pressure transmitter, a torsion-tension-pressure transmitter lower connecting flange, a crushing shaft centralizer, a dynamic sealing pressure plate, a dynamic seal assembly, a preparation kettle sealing disc, a crushing shaft, a preparation kettle, a crushing tool locking pin, a crushing tool, a large-size natural gas hydrate rock sample, a hydraulic oil inlet pipe and a hydraulic oil outlet pipe;
the hydrate preparation subsystem comprises a pressure transmitter, a temperature transmitter, a sliding rail, a seawater inlet valve, and a hydrate slurry outlet valve;
the hydraulic station is connected with the hydraulic cylinder through the hydraulic oil inlet pipe and the hydraulic oil outlet pipe; the hydraulic cylinder is fixedly disposed at the top end of the barrel body through the connecting block; the hydraulic telescopic rod is fixedly disposed in the hydraulic cylinder; the sliding rail is disposed on the inner wall of the barrel body, the slider is fixedly disposed on the motor fixing frame, and the slider is slidably connected with the sliding rail; the electric motor is fixedly mounted on the electric motor fixing frame and is connected with the speed reducer; the lower end of the hydraulic telescopic rod extends into the barrel body and is fixedly connected with the electric motor fixing frame; the preparation kettle is disposed at the bottom of the barrel body; the large-size natural gas hydrate rock sample is stored in the preparation kettle; the speed reducer is connected with the coupling; the lower end of the coupling is connected with the power short shaft; the axial supporting frame is fixedly connected with the electric motor fixing frame; the power short shaft is mounted on the axial supporting frame; the lower end of the power short shaft is connected with the universal joint through a universal joint upper locking pin; the lower end of the universal joint is connected with the torsion-tension-pressure transmitter upper connecting flange through a universal joint lower locking pin; the torsion-tension-pressure transmitter upper connecting flange is fixedly connected with the torsion-tension-pressure transmitter through an upper connecting bolt; the torsion-tension-pressure transmitter is connected with the torsion-tension-pressure transmitter lower connecting flange through a lower connecting bolt; the upper end of the crushing shaft is connected with the torsion-tension-pressure transmitter lower connecting flange through a torsion-tension-pressure transmitter lower locking pin; the lower end of the crushing shaft extends into the preparation kettle; the crushing shaft is fixedly connected with the crushing tool by a crushing tool locking pin; the hydraulic station, the computer, the torsion-tension-pressure transmitter and the electric motor are all connected with the control cabinet.

2. The crushing system for large-size natural gas hydrate rock samples according to claim 1 , wherein the crushing shaft is fixedly mounted in the crusher shaft centralizer; the crushing shaft centralizer is fixed on the dynamic sealing pressure plate by a crushing shaft centralizer connecting bolt; the dynamic sealing pressure plate is fixed on the preparation kettle sealing disc by a dynamic sealing pressure plate bolt; the crushing shaft and the preparation kettle sealing disc are sealed by the dynamic seal assembly; and the preparation kettle sealing disc and the preparation kettle are sealed by the seal ring.

3. The crushing system for large-size natural gas hydrate rock samples according to claim 1 , wherein the thrust bearing is mounted on the power short shaft; and the bearing pressure plate is fixedly mounted on the thrust bearing through a bearing pressure plate bolt.

4. The crushing system for large-size natural gas hydrate rock samples according to claim 1 , wherein the pressure transmitter and a temperature transmitter are fixedly mounted on the preparation kettle and communicate with the interior of the preparation kettle; and the pressure transmitter and the temperature transmitter are connected with the control cabinet respectively.

5. The crushing system for large-size natural gas hydrate rock samples according to claim 1 , wherein the preparation kettle is provided with the seawater inlet valve and the hydrate slurry outlet valve; the seawater inlet valve is mounted on the preparation kettle through a seawater inlet valve connecting bolt; the hydrate slurry outlet valve is mounted on the preparation kettle through a hydrate slurry outlet valve connecting bolt; and the seawater inlet valve and the hydrate slurry outlet valve are connected with the control cabinet respectively.

6. The crushing system for large-size natural gas hydrate rock samples according to claim 1 , wherein the torsion-tension-pressure transmitter is connected with the control cabinet through a torsion-tension-pressure data acquisition line.

Assignees

• Univ Southwest Petroleum

Inventors

• Zhao Jinzhou
• Wei Na
• Liu Chunquan
• Wu Kaisong
• Zhang Liehui
• Zhou Shouwei
• Li Haitao
• Sun wantong

Classifications

• G01N2203/0087

  Resistance to crushing · CPC title

• G01N3/00 Primary

  Investigating strength properties of solid materials by application of mechanical stress · CPC title

• G01N2203/0048

  Hydraulic means · CPC title

• E21B41/0099

  specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates · CPC title

• G01N2203/0067

  Fracture or rupture · CPC title