Pipeline plugging device for heavy oil thermal production wells
A technology of thermal recovery and plugging device for heavy oil, which can be used in earth-moving drilling, sealing/packing, wellbore/well components, etc., which can solve the sealing leakage of packers and affect the production reliability of thermal oil-pumping wells And other issues
Inactive Publication Date: 2013-02-13
SHAANXI HI TECH ENERGY DEV
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Problems solved by technology
[0002] At present, thermal recovery packers are generally used in the plugging process of heavy oil thermal recovery wells in oilfields, but this structure is to clamp the oil extraction pipe to the string. However, in actual production, the string is prone to creep under the action of suction The seal of the packer will leak, and in serious cases, the oil extraction pipe will rebound from the heavy oil thermal recovery well, which affects the reliability of the production of the thermal oil recovery well
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Embodiment 1
[0012] The pipeline plugging device for heavy oil thermal recovery wells according to the present invention includes a hollow bell mouth 1, a Y331 packer, a telescopic tube, and a Y245 packer, and they are connected in sequence, and the Y331 packer includes a sealed A cavity, a piston and a movable inner wall, the airtight cavity is connected with the movable inner wall through the piston, and an expansion agent is arranged in the cavity.
[0013] When in use, the plugging device of the present invention is fixed in the oil pumping well, and the production oil suction pipe is inserted deep into the plugging device. When steam is injected during production, the expansion agent in the Y331 packer pipeline is heated and gasified and expands, and the Its internal piston pushes the movable inner wall to hold the oil extraction pipe tightly to prevent the pipe from rebounding. The telescopic tube of the invention can overcome the unsealing of the packer under high temperature condit...
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The invention discloses a pipeline plugging device for heavy oil thermal production wells, which relates to a pipeline plugging device for oil wells, and particularly relates to a pipeline plugging device for heavy oil thermal production wells. The pipeline plugging device comprises a horn mouth, an expansion device, a compensator and a packer, wherein the horn mouth, the expansion device, the compensator and the packer are all hollow, and sequentially connected. The pipeline plugging device for heavy oil thermal production wells disclosed by the invention is fixed in an oil pumping well, and after an oil pumping pipeline enters into the plugging device, because the lower part of the plugging device is provided with the expansion device, through controlling the expansion of the expansion device, the oil pumping pipeline is tightly held by the plugging device, so that a pipeline rebounding phenomenon caused by the creeping of the pipeline in the process of pumping can be prevented.
Description
technical field [0001] The invention relates to a plugging device for an oil well pipeline, in particular to a plugging device for a pipeline used in a heavy oil thermal recovery well. Background technique [0002] At present, thermal recovery packers are generally used in the plugging process of heavy oil thermal recovery wells in oilfields, but this structure is to clamp the oil extraction pipe to the string. However, in actual production, the string is prone to creep under the action of suction Cause packer sealing to leak, and when severe, the oil extraction pipe will rebound from the heavy oil thermal recovery well, which affects the reliability of the production of the oil thermal recovery well. Contents of the invention [0003] The invention aims at highlighting a heavy oil thermal recovery well pipeline plugging device with better plugging effect on oil pumping pipelines. [0004] The pipeline plugging device for heavy oil thermal recovery well includes a bell mo...
Claims
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Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV