Double pipe shunt constant pressure seat sealer
A technology of inner tube and central tube, applied in the field of double-pipe split-flow constant-pressure sealing device, can solve the problems that the concentric double-pipe water injection packer cannot be fully seated, so as to ensure effective diversion, avoid wear, and meet the requirements of effective sealing Effect
Inactive Publication Date: 2018-03-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, the concentric double-pipe water injection packer has not yet been able to fully set and seal and at the same time play the role of water injection diversion
Method used
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[0014] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.
[0015] Such as figure 1 As shown, the double-pipe shunt constant pressure seat sealer includes an upper joint 2, a lower joint 10, and a center pipe 4. 3. The inner tube sealing plug is inserted downward into the central tube from the upper opening of the upper joint, and the lower end of the inner tube sealing plug abuts against the positioning platform set up on the inner wall of the lower joint, and the inner cavity of the inner tube sealing plug forms a betting channel; The connecting sleeve is set on the outside of the central pipe, and the upper and lower ends of the connecting sleeve are respectively connected to the upper and lower joints. An annular upper injection channel is formed between the connecting sl...
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The invention discloses a double-tube flow dividing constant-pressure setting device. The device comprises an upper joint, a lower joint and a central tube. The upper end and the lower end of the central tube are connected with the upper joint and the lower joint respectively. The setting device further comprises an inner tube sealing plug and a connecting sleeve, wherein the inner tube sealing plug is inserted into the central tube downwards from an opening of the upper joint, and the lower end of the inner tube sealing plug abuts against a locator formed on the inner wall of the lower joint. A lower injection channel is formed in an inner cavity of the inner tube sealing plug, and the outer side of the central tube is sleeved by the connecting sleeve; the upper end and the lower end of the connecting sleeve are connected to the upper joint and the lower joint respectively; an annulus upper injection channel is formed between the connecting sleeve and the central tube; and a temporary plugging switch is arranged in the upper injection channel. An inner sealing ladder-type packing is arranged on the outer wall of the upper end of the central tube, and the inner sealing ladder-type packing is arranged between the outer wall of the inner tube sealing plug and the central tube for sealing. It is ensured that full setting can be carried out on a double-tube water injection packer, and effective flow dividing at the shaft bottom is also ensured; and meanwhile, effective sealing between two tubes under the normal condition can be met.
Description
technical field [0001] The invention relates to a downhole device, in particular to a double-pipe split flow constant pressure seat sealer. Background technique [0002] The concentric double-pipe water injection can realize the effective layered water injection of the large pressure difference oil layer and the ground deployment. It has the characteristics of simple measurement and adjustment and accurate distribution. At the same time, it does not need to be tested and deployed separately, saving a lot of work. Therefore, double-pipe water injection is more suitable for application in offshore oil fields. At present, the concentric double-pipe water injection process has met the requirements of offshore oilfield safety control in terms of safety control, and the concentric double-pipe water injection technology has been effectively implemented in offshore oilfields. But at present, the concentric double-pipe water injection packer can not be fully set and at the same time...
Claims
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IPC IPC(8): E21B33/12
CPCE21B33/1208
Inventor 姜广彬谷开昭张国玉李德忠曾凡春聂文龙刘艳霞刘红兰王进京许玲玲魏新晨曲晓峰郭林园
Owner CHINA PETROLEUM & CHEM CORP