Vacuum heat-preservation circulating pipe special for oil production of oilfield
A technology of vacuum insulation and circulating pipes, which is applied in drilling pipes, casings, earthwork drilling and production, etc. It can solve the problems of not finding heavy oil heating, increasing the burden of oil-water separation, and increasing the water content of crude oil, and achieves simple structure and heat preservation effect Good, the effect of yield and quality improvement
Active Publication Date: 2012-10-03
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The direct problem caused by this heating method is that the water content of the crude oil increases, resulting in a significant reduction in the quality of the crude oil and increasing the burden of subsequent oil-water separation
Due to the harsh environment of downhole oil production in oil fields, there is no technical means of heating heavy oil through internal circulation of pipe fittings.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific examples, but not as a limitation of the present invention.
[0014] as attached Figure 1-3 As shown, a special vacuum insulation circulation pipe for oil production in an oil field comprises a hollow outer pipe 1 and a vacuum insulation pipe 2 installed inside, forming an annular cavity between the two; the two ends of the hollow outer pipe 1 are respectively provided with male threaded joints and The female threaded joint, wherein the male threaded joint is provided with a sealing ring 3; the two ends of the vacuum insulation tube are respectively provided with a male threaded joint 5 and a female threaded joint 11, and the middle is a double-layer vacuum insulation structure, wherein the male threaded joint 5 is provided with a sealing ring Ring 4, the double-layer vacuum insulation structure includes an inner tube 8 and an outer tube 7, and a spacer ring...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of oil production equipment, in particular to a vacuum heat-preservation circulating pipe special for the oil production of an oilfield. The vacuum heat-preservation circulating pipe is applied to the viscosity reduction and paraffin precipitation prevention of crude oil in thick oil production heating operation. The technical scheme is that: a vacuum heat-preservation pipe is arranged in a hollow outer pipe, and an annular cavity is formed between the vacuum heat-preservation pipe and the hollow outer pipe; a joint is arranged at each of the two ends of the vacuum heat-preservation pipe, and a double-layer vacuum heat-preservation structure is arranged on the middle part of the vacuum heat-preservation pipe; a runner groove is formed in the joint at each of the two ends of the vacuum heat-preservation pipe; and the runner grooves, the annular cavity and a pipe cavity of the vacuum heat-preservation pipe form a circulation communicating channel. The vacuum heat-preservation circulating pipe has the advantages of simple structure, convenience for mounting, long service life and reusability; the vacuum heat-preservation pipe has a good heat-preservation effect; and the viscosity of the crude oil can be reduced, and paraffin precipitation can be prevented, so that the yield of the crude oil can be improved.
Description
technical field [0001] The invention relates to the technical field of oil production equipment, in particular to a special vacuum heat preservation circulation pipe for oil production in oilfields, which is suitable for reducing the viscosity of crude oil and preventing wax deposition in the heating operation of heavy oil production. Background technique [0002] In the process of heavy oil production, due to the high viscosity and easy waxing of crude oil during the production process, the output of crude oil is greatly affected. For this reason, the current processing method is to inject high-temperature hot water downhole through the sucker rod or oil pipe, and the hot water is directly mixed with the heavy oil for heat exchange, so as to reduce the viscosity of the heavy oil and improve the output of oil recovery. The direct problem caused by this heating method is that the water content of the crude oil increases, resulting in a significant reduction in the quality of ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): E21B17/18
Inventor 谢伟郑家远刘广东王伟林唐述凯张洪生赵芝蓉李龙丁海滨叶蜀鹏
Owner CHINA PETROLEUM & CHEM CORP