Packer

A technology of packer and unloader, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems of difficult unsealing, difficult multiple setting of pipe strings, rubber cartridges and slips It is not easy to recover and other problems, so as to achieve the effect of easy unblocking

CN104929562AActive Publication Date: 2015-09-23ANTON OILFIELD SERVICES (GRP) LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-09-23

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Abstract

The invention provides a packer, and relates to the field of downhole layered oil production tools. The packer aims to achieve multi-setting by entering a well once. According to the mainly adopted technical scheme, the packer comprises a mandrel, a rubber cylinder assembly, a cone, a slips assembly, a lock pin assembly and an unloader, wherein the upper end and the lower end of the mandrel are provided with an upper connector and a lower connector respectively; the mandrel is used for being arranged outside a center pipe in a sleeving mode; the rubber cylinder assembly is connected with the lower portion of the mandrel through the lower connector; the cone, the slips assembly and the lock pin assembly are arranged in the mode of being sequentially away from the rubber cylinder assembly and arranged on the lower portion of the mandrel in a sliding mode; the portion, corresponding to the lock pin assembly, of the lower portion of the mandrel is provided with a bent sliding rail for guiding the sliding direction of the lock pin assembly; both the lower portion of the mandrel and the cone are provided with pressure transmission holes; the unloader comprises a first sub unloader body and a second sub unloader body detachably connected with the first sub unloader body, the first sub unloader body is connected with the upper portion of the mandrel through the upper connector, and the second sub unloader body adjacent to the rubber cylinder assembly is arranged on the upper portion of the mandrel in a sliding mode.
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Description

technical field

[0001] The invention relates to the field of downhole layered oil recovery tools, in particular to a packer. Background technique

[0002] The packer is a kind of elastic sealing element, which is used to isolate the annular space between the pipe strings of various sizes and the wellbore and between the pipe strings, and isolate the production layer to control the production (injection) fluid and protect the casing. The downhole tools are widely used in oil wells, gas wells, well completions and other operations in the petroleum industry.

[0003] The work of the packer generally includes the steps of setting, anchoring and unsealing. Setting is to separate the casing and tubing through the deformation of the rubber tube. Anchoring is used to hold the packer in place. Unpacking is done to restore the deformation of the cartridge to remove the packer from the well.

[0004] The current packer is set by hydraulic pressure. After the fracturing is completed,...

Examples

Embodiment Construction

[0055] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and effects of the test bench proposed according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. The description is as follows. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0056] Such as figure 1 and figure 2As shown, the structural schematic diagram of the packer provided by the embodiment of the present invention. A packer in this embodiment includes: a mandrel 10 with an upper joint 11 and a lower joint 12 at the upper and lower ends respectively, a rubber cartridge assembly 20 , a...