Formation testing and sampling dual-packer

A formation testing and packer technology, applied in sealing/isolation, measurement, wellbore/well components, etc., can solve the problems of high testing cost, small pressure testing and sampling area, formation pollution, etc.

CN107355195APending Publication Date: 2017-11-17北京捷威思特科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-11-17

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Abstract

The invention discloses a formation testing and sampling dual-packer. The formation testing and sampling dual-packer comprises a first packer unit, an automatic recycling arm 1, an isolation pup joint (selectable), a second packer unit, an automatic recycling arm 2 and a hydraulic control section. Packing elements of the first packer unit and the second packer unit are expandable packer rubber sleeves, the automatic recycling arms are installed on the lower ends of the expandable packer rubber sleeves of the first packer unit and the second packer unit, the isolation pup joint (selectable) is connected to the lower end of the first packer unit and the upper end of the second packer unit, the isolation pup joint (selectable) or the second packer unit is provided with an inlet for sucking liquid, the inlet is provided with a wire-wrapped screen serving as a filter screen, and the lower end of the second packer unit is connected with the hydraulic control section. According to the invention, dependence on geological conditions is eliminated, a large-area large-space pressure testing and sampling scheme is achieved, the problem that the packer rubber sleeve cannot be released smoothly is solved, and the formation testing and sampling dual-packer can be applied to barefoot wells or cased wells.
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Description

technical field

[0001] The invention relates to a double packer for stratum testing and sampling, which relates to a traditional DST drill pipe tester and a stratum tester, and belongs to the field of petroleum exploration and testing. Background technique

[0002] At present, formation pressure testing and formation sampling technologies mainly include conventional DST drill pipe test and probe formation tester. The traditional DST drill pipe test has problems such as long operation time, easy formation pollution, high test cost, and difficulty in setting the packer; the probe formation test is highly dependent on geological conditions, and the setting area is small. The length of the needle is limited, the pressure test and sampling area are relatively small, and it is difficult to obtain real and representative formation fluid, which makes subsequent sample analysis and geological exploration difficult. Contents of the invention

[0003] In order to solve the above pro...

Examples

Embodiment Construction

[0020] In order to make the structure and advantages of the double packer of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings. It should be pointed out that the implemented schemes and features of the present invention are not limited to the present invention, and any modifications and changes in specific implementations by those skilled in the art are still within the protection scope of the patent of the present invention.

[0021] Such as figure 1 As shown, the double packer for formation testing and sampling of the present invention mainly includes: a first packer 1, an automatic recovery arm 12, a spacer nipple (optional) 2, a second packer 3, an automatic recovery arm 32, a hydraulic control paragraph 4.

[0022] The first packer 1 is equipped with an expandable packer rubber tube 11, and an expansion line A for expanding the rubber tube is arranged inside, and a bypass for balancing the p...