6 results about "Wax deposition" patented technology

This utility model provides a device for testing wax deposition in dissolved gas crude oil, comprising: a fixed frame, a deposition component for depositing wax movably mounted on the upper side of the fixed frame, a deposition tank for storing crude oil on the left front side of the fixed frame, and a stripping component for stripping the deposited wax on the right front side of the fixed frame. Compared with the prior art, this utility model has the following advantages: by setting the deposition component and the deposition tank, the deposition cylinder can rotate circumferentially, thereby contacting more dissolved gas crude oil, thus simulating the effect of wax deposition under the movement of dissolved gas crude oil, avoiding the problem of test result distortion caused by static wax deposition, and helping to ensure the authenticity of the test environment. The setting of the stripping component, the fixed frame, and the deposition component reduces the amount of wax residue on the deposition cylinder, ensuring the authenticity and reliability of the test results.

The utility model discloses a wax deposition determination flash filter relates to the petroleum chemical industry detection equipment field, including filter main part, two groups of filter inlet joint, bar hollow support, filter screen and netted support, through the combination design of bar hollow support and filter screen, netted support makes filter screen installation stable, can effectively resist high pressure fluid impact, prevents the collapse, through the pull bar hollow support, takes out the whole filter screen and netted support whole, has realized the quick sampling of deposit and the convenient replacement of filter screen, and filter screen design can replace, makes the device can nimblely adapt to the multiple crude oil system of different wax crystal size, promotes the experimental flexibility and repeatability, provides high reliability data support for wax deposition mechanism research and prevention and control technology development, widens the application range.

This invention relates to the field of oil pumping unit control system technology, and particularly to an intelligent control method and system for a rotary motor commutating oil pumping unit. An intelligent control method for a rotary motor commutating oil pumping unit includes the following steps: S1: During the process of the oil pumping unit collecting high-wax crude oil, downhole environmental data and oil pumping unit operating data are collected in real time; S2: A pressure wax precipitation model is constructed based on the downhole environmental data, and a wax precipitation risk index is calculated based on the pressure wax precipitation model; S3: The pumping unit's resistance strength index is calculated based on the pumping unit operating data and the wax precipitation risk index; S4: The target operating stroke of the pumping unit is optimized based on the resistance strength index; S5: The rotary motor is commutated based on the target operating stroke. This invention can achieve a dynamic balance between fluid supply capacity utilization and wax deposition suppression, and can dynamically adapt to different oil well geological conditions and crude oil wax precipitation characteristics.

This invention provides an evaluation method for ensuring the flow of crude oil in a pipeline, relating to the technical field of oil extraction. The method includes: obtaining pipeline design parameters, basic crude oil physical properties, environmental parameters of the pipeline location, and equipment design parameters; constructing a mathematical model of pipeline temperature during shutdown and a soil heat transfer model; obtaining heat loss and soil heat transfer loss during shutdown based on the pipeline design parameters, basic crude oil physical properties, environmental parameters of the pipeline location, equipment design parameters, the mathematical model of pipeline temperature during shutdown, and the soil heat transfer model; obtaining the pipeline end temperature based on the heat loss and soil heat transfer loss during shutdown; obtaining a first threshold and determining whether the first threshold is lower than the pipeline end temperature. This invention provides an effective and accurate evaluation method for assessing the flowability of crude oil in pipelines, preventing wax deposition, and determining a reasonable crude oil outlet temperature.

This invention relates to the field of oilfield production technology, and in particular to a temperature acquisition and evaluation device for simulating the wax deposition process in oil wells. It mainly addresses the problems of large errors in measuring wax deposition and inaccurate detection of the wax-preventing effect of existing wax deposition simulation devices. A back pressure valve (21) is installed at the inlet of the raw oil tank (1). The outlet of the raw oil tank (1) is connected to a power pump (5) via a pipeline (14). A wax deposition simulation cylinder (7) is connected to the pipeline (14) at the outlet of the power pump (5). The outlet of the wax deposition simulation cylinder (7) is connected to a valve group (12) via a pipeline (14), and a temperature sensor (11) is connected to the pipeline (14) at the outlet of the wax deposition simulation cylinder (7). The outlet of the valve group (12) is connected to the back pressure valve (21) via a pipeline (14). This device can simulate wax deposition in oil wells and detect wax removal and prevention tools and technologies, which is of great significance for energy saving and consumption reduction in mechanized wells and for defining the application scope of wax prevention tools and technologies.