Sealing device

A sealing device and metal casing technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of low pressure test efficiency, high test cost, short service life of the sealing head, etc., to improve the pressure test efficiency, Provides service life and reduces test costs

A sealing device and metal casing technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of low pressure test efficiency, high test cost, short service life of the sealing head, etc., to improve the pressure test efficiency, Provides service life and reduces test costs

CN1314912CInactive Publication Date: 2007-05-09BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Sealing device
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Embodiment Construction

[0013] As shown in Figure 1, the present invention includes: a metal casing 1 with a "匚"-shaped radial section; a rubber layer 2 with a "匚"-shaped radial section arranged inside the casing 1, and a Ring-shaped rubber bag 3; a metal skeleton 4 with a "C"-shaped cross section is arranged in the rubber layer 2 outside the rubber bag 3. A guard plate 5 is connected to the inner end of the metal shell 2 through a fixing piece 6 to block the rubber bag 3 , and a through hole 7 corresponding to the diameter of the sealed part is provided in the center of the guard plate 6 . An oil inlet pipe 8 and an oil outlet pipe 9 are connected to the rubber bag 3 respectively, and are fixedly connected to the metal casing 1 .

[0014] The above-mentioned embodiment is a sealing device arranged at one end that needs to be sealed. If both ends of the tool to be sealed adopt the present invention, and high-pressure water needs to be fed from one side, a communication device can be fixedly installed...

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Abstract

The invention relates to a sealing device, including: a metallic case with a n-shaped section; a rubber layer with a n-shaped section in which there is an annular rubber cell; a metallic frame with a C-shaped section, set in the rubber layer outside the rubber cell; a guard board connected at the inner end of the metallic case and set with a through hole in the center directly corresponding to a seal component; an oil inlet and outlet pipe, respectively connected with the rubber cell and fixed with the metallic case. Its sealing function is implemented by deformation of the rubber cell, i.e. when the high-pressure oil is charged in the rubber cell, the rubber cell deforms to closely adhere to the tool so as to play a role in sealing, and when the high-pressure oil is drained, the rubber cell can rapidly returns to set aside a space for taking the tool out, therefore the rubber cell can not be damaged by friction, the sealing effect good and the pressure measuring efficiency high and the service life is effectively prolonged. It can be used in pressure-testing device of oil tool and also widely used in other sealing devices with higher pressure pipelines.

Description

technical field [0001] The invention relates to a sealing device, in particular to a rubber sealing device for a pressure testing machine. Background technique [0002] In oil drilling and oil production operations, downhole tools are necessary devices. Different types of tools have different structures according to their different functions, but their shapes are similar, with a length of about 1 meter and an outer diameter of 70 to 115 mm. The pipe fittings are connected by threads. Since the inner cavity of the tool must withstand a pressure of 20-40 MPa and no leakage occurs during the working process of the tool, after the qualified tool is assembled, a pressure test must be carried out, that is, high-pressure water is poured into the inner cavity of the tool, and the pressure is stabilized to a certain extent. Time, check whether the tool has leakage, and then ensure the reliability of the tool in actual use. [0003] To carry out the pressure test, it is necessary to...

Claims

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Application Information

Patent Timeline
09 May 2007
Publication
CN1314912C
IPC
F16J15/12
Inventors
潘英民; 刘艳