Salvaging method for pipeline tapping saddle plate
A technology of saddle-shaped plates and pipes, applied in the directions of cleaning methods and utensils, chemical instruments and methods, cleaning hollow objects, etc., can solve the problems of inconvenience, economic losses of owners, construction costs and high risks, etc.
Inactive Publication Date: 2010-11-03
CHINA PETROLEUM PIPELINE BUREAU
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Problems solved by technology
One is to stop and vent the pipeline, and the saddle plate is manually taken out by the construction personnel. This method will bring huge economic losses to the owner and bring great inconvenience to the customer; the other is to use the non-stop sealing process , vent the plugging section, and the saddle plate is manually removed by the construction personnel. This method has huge construction costs and risks for high-pressure large-diameter pipelines
Method used
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[0016] Example. Taking a 1016mm natural gas pipeline as an example, the operating parameters of the pipeline are: the outer diameter of the perforated saddle plate is 889mm, the weight is 215Kg, the pipeline pressure is 6.0MPa, and the temperature is 20°C.
[0017] First of all, the position of the saddle plate needs to be detected. In this case, it is a transparent natural gas medium, so the method of camera detection is adopted. Use the 6.4MPa pipeline high-pressure endoscopic detection device, install it on the 2400 type hole tapping machine or the 1016 plugging device, install the 1016 sandwich valve on the 1016 hole opening tee of the pipeline, and install the 2400 type hole tapping device equipped with the detection device. The hole machine or 1016 plugging device is installed on the 1016 sandwich valve; balance the pressure of the valve core, then open the 1016 sandwich valve, operate the 2400 type hole tapping machine or the 1016 plugging device, and make the main shaft...
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The invention discloses a salvaging method for a pipeline tapping saddle plate after the saddle plate falls into a pipeline during the tapping operation for the conveying pipeline and relates to the technical field of a pipeline system. The method comprises the following steps: determining operation parameters of the pipeline; determining the position and form of the saddle plate; and salvaging by using a salvaging device. The step of determining operation parameters of the pipeline determines parameters such as the aperture of the pipeline, pressure, size and weight of the saddle plate, medium in the pipeline and temperature. The step of determining the position and form of the saddle plate selects a detection method according to the operation parameters of the pipeline and judges the position of the saddle plate by using a hole plugging device and an image pickup detection method for clean and transparent medium, and judges the position by using an X ray or ultrasonic detection method for non-transparent medium. The step of salvaging by using a salving device performs salvage by using the hole plugging device and the salvaging device according to the detection result. The invention realizes operation without plugging or stopping transmitting / emptying the pipeline and ensures low cost and low risk.
Description
technical field [0001] The invention relates to a fishing method for the saddle-shaped plate of pipeline opening after the saddle-shaped plate produced during the drilling operation of the pipeline falls into the pipeline. Foreign-related pipeline system technology field. Background technique [0002] During the drilling process of the pipeline, a saddle plate will be produced by cutting the hole with the barrel cutter. Although a device is designed on the center drill of the barrel cutter to prevent the saddle plate from falling, there is still a problem under some extreme conditions. The risk of the saddle plate falling into the operating pipeline, and this situation has also occurred in actual projects, if the saddle plate falls into the operating pipeline, it will bring great harm to the subsequent pipeline pigging and internal inspection trouble. [0003] Currently, there are two methods for salvaging pipeline saddle plates. One is to stop and vent the pipeline, and ...
Claims
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IPC IPC(8): B08B9/027
Inventor 刘格非刘金宝王国超王鑫夏国发王宏生周若厅
Owner CHINA PETROLEUM PIPELINE BUREAU