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Cement-injecting plugging device

A plug, cement injection technology, applied in the directions of sealing/packing, wellbore/well components, earth-moving drilling, etc., to ensure the effect of construction safety

Active Publication Date: 2018-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Cement-injecting plugging device

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Embodiment Construction

[0019] The detailed description and technical content of the present invention are described below with the drawings, but the drawings are only for reference and description, and are not used to limit the present invention.

[0020] Such as figure 1 As shown, the cement injection occluder is composed of an upper joint 1 , a suspension device 2 , a setting device 3 , an inner filling and blocking device 4 , and an outer filling and sealing device 5 . The suspension device 2 and the setting device 3 are connected up and down and set on the central pipe 12 at the same time, the upper end of the outer filling and sealing device 5 is connected to the lower end of the central pipe, and the inner filling and blocking device 4 is located inside the outer filling and packing device 5 .

[0021] Suspension device 2 is made up of upper cone 6, unsealing pin 7, slip tube 8, slips 9, leaf spring 10, lower cone 11, and central tube 12. Among them, the slip tube 8 is provided with a slot wi...

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Abstract

The invention discloses a cement-injecting plugging device which comprises a central pipe, a hanging device, a setting device, an inner filling and blocking device and an outer filling and packing device. The hanging device and the setting device are vertically connected and simultaneously mounted on the central pipe in a sleeving mode. The upper end of the outer filling and packing device is connected with the lower end of the central pipe, and the inner filling and blocking device is located in the outer filling and packing device. The cement-injecting plugging device is lowered to the upperportion of a plugging layer, after ball putting, suppressing and setting, the plugging layer and an upper oil layer are separated in a packed mode, and suppressing is conducted again to open a construction tunnel; and then cement is injected into the plugging layer through the cement-injecting plugging device, the cement above the bottom of the tool is backflushed away instantly, after the cementloses liquidity, the tool is pulled out, and the cement-injecting plugging device is a safe and effective plugging tool accordingly.

Description

technical field [0001] The invention relates to an oilfield downhole tool, in particular to a cementing plugging device. Background technique [0002] After the oil well is drilled, the well trajectory passes through many layers. Generally, the lower oil layer is exploited first, and then the upper oil layer is exploited by going up. Due to the conflict between layers, the lower layer is often blocked. At present, the cement injection plugging process is commonly used, which is to use the tubing to the upper end of the plugging target layer, squeeze the cement slurry into the layer to be plugged through the tubing, shut the well and wait for the pressure to diffuse, and lower the drill bit to drill the excess cement plug go. This process can only be applied when the upper oil layer has not been shot and there is no leakage point in the upper part of the plugging section, otherwise it is easy to squeeze the cement into the upper oil layer or leakage point, pollute the oil la...

Claims

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Application Information

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IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 刘广东韩继盟郭娜娜闫治涛朱建军王冰冰杜郑豪梁慧刘宁张虎贲
Owner CHINA PETROLEUM & CHEM CORP
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