一种石油钻井液取样装置

Abstract

本实用新型公开了一种石油钻井液取样装置，属于石油开采技术领域，包括：取样器，所述取样器与钻井液管路连接；所述取样器包括：取样筒和防护组件；所述防护组件围绕所述取样筒设置，且所述取样筒的顶部处和底部处分别与所述防护组件的顶部处和底部处柔性连接；所述防护组件的顶部与所述钻井液管路固定且密封连接；所述防护组件与所述钻井液管路通过稳压管连通；所述取样筒的底部设置有排液管，所述排液管穿过所述防护组件设置，所述排液管上设置有排液阀；所述取样筒与所述防护组件的接触位置密封连接；本申请通过防护组件与稳压管的配合，可实时平衡取样筒内外压力，减少压差对装置的冲击，避免腔体变形，降低密封失效风险。

Claims

1. An oil drilling fluid sampling device, characterized by, The application relates to a sampling device for drilling fluid. The sampling device comprises a sampler connected with a drilling fluid pipeline. The sampler comprises a sampling cylinder and a protection assembly. The protection assembly is arranged around the sampling cylinder, and the top and bottom of the sampling cylinder are flexibly connected with the top and bottom of the protection assembly respectively. The top of the protection assembly is fixedly and sealingly connected with the drilling fluid pipeline. The protection assembly has elastic contraction on the side surface in contact with the sampling cylinder. The protection assembly is communicated with the drilling fluid pipeline through a pressure stabilizing pipe, and an electromagnetic valve is arranged on the pressure stabilizing pipe. The drilling fluid pipeline is communicated with the top end of the sampling cylinder through a liquid inlet pipe passing through the protection assembly, and a one-way valve is arranged on the liquid inlet pipe. A liquid outlet pipe is arranged at the bottom of the sampling cylinder, and the liquid outlet pipe passes through the protection assembly, and a liquid outlet valve is arranged on the liquid outlet pipe. The contact position of the sampling cylinder and the protection assembly is sealingly connected. An activity assembly is arranged in the sampling cylinder, the bottom of the activity assembly is elastically connected with the inner wall of the sampling cylinder, a flow passage is arranged on the activity assembly, and an elastic assembly is arranged in the flow passage. In a free state, the elastic assembly blocks the flow passage, the electromagnetic valve is opened, and the one-way valve and the liquid outlet valve are closed.

2. The petroleum drilling fluid sampling device of claim 1, wherein, The protection assembly comprises an outer shell and a bellows. The outer shell is arranged around the sampling cylinder, and a space is left between the outer shell and the sampling cylinder. The top of the outer shell is sealingly and fixedly connected with the surface of the liquid inlet pipe. The bottom of the outer shell is sealingly and fixedly connected with the surface of the liquid outlet pipe. The bellows is arranged between the outer shell and the sampling cylinder. The top of the bellows is fixedly and sealingly connected with the top of the outer shell, and the bottom of the bellows is fixedly and sealingly connected with the top of the bottom of the outer shell. The top end surface of the sampling cylinder is flexibly connected with the top of the bellows, and the bottom end surface of the sampling cylinder is flexibly connected with the bottom of the bellows. The liquid outlet pipe passes through the outer shell and the bellows. The pressure stabilizing pipe passes through the outer shell.

3. The petroleum drilling fluid sampling device of claim 2, wherein, A polyether ether ketone heat insulation layer is wrapped on the outer surface of the bellows.

4. The petroleum drilling fluid sampling device of claim 1, wherein, The activity assembly comprises a spring and a piston. The piston is arranged in the sampling cylinder, the bottom of the piston is connected with one end of the spring, and the other end of the spring is connected with the inner wall of the sampling cylinder. The piston is provided with a flow passage.

5. The petroleum drilling fluid sampling device of claim 4, wherein, The flow passage comprises a first passage and a second passage. The first passage is arranged downward from the top of the piston, and the depth of the first passage is smaller than the thickness of the piston. The second passage is arranged obliquely, and the second passage guides the side wall of the first passage and the bottom of the piston. The second passage is arranged close to the bottom of the first passage. The activity assembly is arranged in the first passage.

6. The petroleum drilling fluid sampling device of claim 5, wherein, The activity assembly comprises a pressing block, a compression spring and a guide rod. The pressing block is arranged in the first passage, and the bottom of the pressing block is connected with one end of the guide rod. The bottom of the first passage is provided with a vertical downward limiting deep hole, and the other end of the guide rod is inserted into the limiting deep hole. One end of the compression spring is connected with the bottom of the pressing block, the other end of the compression spring is connected with the bottom of the first channel, and the guide rod is arranged through the middle of the compression spring.

7. The petroleum drilling fluid sampling device of claim 6, wherein, The guide rod is of a telescopic structure.

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