Inner rotor type rotary joint
A technology of rotary joints and inner rotors, which is applied in drilling equipment, earthwork drilling, drilling pipes, etc., and achieves the effects of simple structure, convenient use and good sealing effect
Active Publication Date: 2011-01-19
DAQING PETROLEUM ADMINISTRATION +1
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Problems solved by technology
However, there is no device in the prior art that can continuously rotate with the experimental drilling tool, and at the same time circulate the drilling fluid under a certain pressure, so that the experimental tool is closer to the real working state of the drilling tool in the downhole during the indoor test.
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[0011] The present invention will be further described below in conjunction with accompanying drawing:
[0012] Depend on Figure 1 to Figure 3 As shown, the inner rotor type rotary joint mainly includes a mandrel 1, a main body 2, a packing 4, a support seat 5, a pressure ring 6 and a bearing 9; wherein, the upper part of the mandrel 1 is tapered, and has a Connected external threads, the middle part of the outer wall of the mandrel 1 is in the shape of an inverted cone, and there is an annular limiting groove 11 at the small end of the inverse cone, and the lower end of the mandrel 1 has a positioning shoulder 13, such as figure 2 As shown; said mandrel 1 and main body 2 respectively have a central blind hole, the aperture of the blind hole on the main body 2 is the upper and lower sections of unequal diameter holes, the upper section aperture and the cylindrical surface of the mandrel 1 form a ring cavity, in There is an annular supporting seat 5 in the middle of the ring...
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The invention discloses an inner rotor type rotary joint used for a petroleum and natural gas drilling tool test matching device and aims to make test tools approach the actual underground working conditions of a drilling tool in indoor tests. In the rotary joint, the outer wall of a mandrel is provided with an annular limiting groove; the lower end of the mandrel is provided with a positioning shaft shoulder; a main body and the mandrel are provided with a central blind hole respectively; the bottom of the blind hole of the main body is provided with a bearing; the lower part of the mandrel is arranged in the central hole of the main body, and the lower positioning shaft shoulder is arranged on the bearing; radial through holes are uniformly distributed on the main body and the lower side wall of the mandrel; annular supporting seats are arranged among the hole walls on the upper parts of the mandrel and the main body; a packing is arranged in each supporting seat; the upper ends of the supporting seats are provided with compression rings fixed on the end face of the main body; and the compression rings are clamped in the limiting groove of the mandrel. The joint can simulate the actual underground working conditions of the drilling tool, can circulate drilling fluid under certain pressure, keeps the test tools continuously rotating and better verifies and detects the action and performance of the drilling tools.
Description
technical field [0001] The invention relates to a mechanical joint, in particular to an inner-rotor type rotary joint used in a test supporting device of oil and natural gas drilling tools. Background technique [0002] In order to make the drilling tool meet the needs of the actual downhole environment when it is put into use, and complete the drilling work as required, before it is actually put into use for drilling, it is often necessary to use a test drilling tool to simulate a real drilling tool. , conduct a large number of indoor tests, including the experiment that the drilling fluid can be circulated under a certain pressure, while maintaining the continuous rotation of the test drilling tool, to verify and test the action and performance of the drilling tool. However, there is no device in the prior art that can follow the continuous rotation of the experimental drilling tool and at the same time circulate the drilling fluid under a certain pressure, so that the exp...
Claims
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IPC IPC(8): E21B17/02
Inventor 李相勇李玉海柳长鹏王洪潮姚江涛
Owner DAQING PETROLEUM ADMINISTRATION