Compression-type two-way pressure-bearing controllable flushing packer
A well-flushing packer and two-way pressure-bearing technology, which is applied in the direction of flushing wellbore, sealing/packing, wellbore/well components, etc. The effect of layering reliability and water injection qualification rate, preventing cross-flow between layers, and facilitating well cleaning
Active Publication Date: 2019-04-26
XINJIANG HUALONG OILFIELD TECHNOLOGICAL LIABILITY
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Problems solved by technology
[0003] The present invention provides a compressive two-way pressure-bearing controllable well flushing packer, which overcomes the deficiencies of the prior art and can effectively solve the problem that the existing packer cannot effectively control the opening and closing of the well flushing valve. The problem
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[0020] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.
[0021] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of Figure 1 of the specification, such as: the positional relationship of front, rear, top, bottom, left, right, etc. It is determined according to the layout direction of the drawings in the description.
[0022] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:
[0023]As shown in Figures 1 to 7, the compression-type two-way pressure-bearing controllable well flushing packer includes an upper joint 1, a central pipe 2, a lower joint 3, a short connection 4, an upper cylinder liner 5, an overflow pipe 6, a compression Device and ...
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The invention relates to the technical field of packers, in particular to a compression type bi-directional bearing controllable well washing packer. The packer comprises an upper connector, a center pipe, a lower connector, a short joint, an upper cylinder sleeve, a flow passing pipe, a compression device and a seat seal cylinder. The middle inside of the upper connector and the upper end outside of the center pipe are fixedly installed together. The packer is reasonable and compact in structure and convenient to use. Through the arrangement of a switching sliding sleeve, a switching hinge pine, a compression spring and other devices, locking and unlocking of a well washing valve can be effectively controlled, and locking and unlocking of the well washing valve can be controlled by controlling the number of times of pressurization in an oil pipe, so that one the one hand, well washing is convenient, and on the other hand, interlayer series flow is prevented. Therefore, layering reliability is improved, and the water injection pass rate is increased. After being seat-sealed, the packer can be still kept in a non-deblocking state after pressure relief in the oil pipe, and thus the stability of seat sealing is improved. In addition, the packer has high bi-directional bearing ability.
Description
technical field [0001] The invention relates to the technical field of packers, and relates to a compressive bidirectional pressure-bearing controllable well flushing packer. Background technique [0002] When water injection is used to develop oil fields, the pressure difference between layers gradually increases with the increase of water injection time, and the problem of backflow from high pressure layer to low pressure layer becomes more and more serious, which seriously affects the effect of layer injection. At present, in the layered water injection compression type washable packer, when the pressure of the upper oil layer is greater than the opening pressure of the well flushing valve, the liquid in the upper oil layer will enter the lower oil layer through the well flushing channel. When the pressure in the lower oil layer is greater than the sealing pressure of the packer, the liquid in the lower oil layer will leak into the upper oil layer, forming interlayer chan...
Claims
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IPC IPC(8): E21B33/122E21B21/10
CPCE21B21/10E21B33/1208E21B33/122E21B33/1285
Inventor 董广云徐恩王玉陈海鹏张宗琴毛天聪王鲁川纪萍王树斌韩忠林
Owner XINJIANG HUALONG OILFIELD TECHNOLOGICAL LIABILITY