Recyclable hydraulic production packer

A packer and hydraulic technology, applied in the directions of sealing/packing, earth-moving drilling, wellbore/well components, etc. Reliable sealing, long service life, and the effect of reducing resistance

Inactive Publication Date: 2015-11-18
四机赛瓦石油钻采设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to structural reasons, the conventional mechanical packer is used with a rotating string, especially not suitable for ultra-deep wells or deviated wells where the torque is not well transmitted. In horizontal wells
Conventional hydraulic packers generally have low pressure bearing capacity, the pressure is generally below 35MPa, and the high temperature resistance is also low, generally the high temperature resistance is below 150°C
After being used in water wells, due to the frequent actions of the anchor tiles, it is easy to damage, and there are hidden dangers in the later unsealing

Method used

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  • Recyclable hydraulic production packer

Examples

Experimental program
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Effect test

Embodiment

[0043]When the packer is running into the well, the design of the large bypass hole on the valve casing can reduce the swabbing effect when running and recovering. Use the supporting cannula or ball seat to form a seal at the inner hole of the packer, pressurize from the oil pipe, and the liquid passes through the pressure transmission hole 34 of the upper center pipe 3 to generate an axial downward thrust on the setting piston 10, and the pressure reaches When the unsealing force is applied, the setting piston 10 cuts off the first shear pin 32, and moves downward to push the lower cone 12 to squeeze the lower slip 13. When the extrusion force reaches the breaking force of the slip retaining ring 15, the lower slip 13 radial tension bites into sleeve pipe. The pressure of the pressure transmission hole 34 is transmitted upwards at the same time, pushing the connecting sleeve 25 to move upward. After the setting piston 10 gives way to the radial space, the pawl body 11 is driv...

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PUM

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Abstract

A recyclable hydraulic production packer is provided with bi-directional slips, can be used for setting at stretching, retracting or neutral states, and also can bear pressure differences form above and below. With the design of large bypass openings inside the packer, swabbing effects during lowering and retracting can be reduced, and the large bypass openings are automatically closed during setting. When the packer is unset, the bypass openings are first opened, up-down pressure is balanced, when the packer bears a lower pressure, a compensation piston can further ensure that an upper slip bits tightly, the setting is reliable, and resistance during retraction of tools can be reduced through an upper slip release device of the packer. The packer provided by the present invention is characterized by being excellent in pressure bearing capability, capable of setting in various working conditions, and recyclable.

Description

technical field [0001] The invention relates to oil drilling and production equipment, in particular to a retrievable hydraulic oil production packer. Background technique [0002] The oil production packer is a key part in well completion. It is used as a downhole safety barrier to block the blowout when there is a critical situation at the wellhead. The packer must be firmly anchored in the casing and maintain the gap between the production tubing and the casing. seal. Due to structural reasons, conventional mechanical packers are operated with a rotating string, especially not suitable for ultra-deep wells, deviated wells, or horizontal wells where torque transmission is difficult. Conventional hydraulic packers generally have low pressure bearing capacity, generally below 35MPa, and low high temperature resistance, generally below 150°C. After being used in water wells, due to the frequent actions of the anchor tiles, it is easy to damage, and there are hidden dangers ...

Claims

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Application Information

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IPC IPC(8): E21B33/129E21B33/127
Inventor 杨小城荣佳佳邹刚周歆赵俊峰
Owner 四机赛瓦石油钻采设备有限公司
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