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Open hole inflatable packer

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Description

I. Overview

The packer uses a hydraulic expansion packer. The lower part of the packer is connected to the setting ball seat, the short segment screen is busy, the pressure is set, and the built-in single flow valve is opened until it is completely set at a certain pressure. It has the advantages of simple operation and reliable performance. It can be used in 4 ½ "open hole formation testing and acid pressure, and can also be used in 5 ½" cased Wells (Max. 7 "), stratified oil production and stratified water injection, formation testing, acid pressure and other measures.

Second, performance characteristics

1. The packer adopts hydraulic setting in the structure and lifts the seal;

2, large pressure difference, strong adaptability, small size packer can seal large diameter hole, and the hole rules are not strict requirements;

3. Long sealing section, reliable sealing pressure difference, long service life, fast unlocking speed;

4. The packer is designed to resist water stroke, avoid setting accidents in the middle of the running process, and improve the running safety in horizontal well construction.

3. Operation technical parameters

Packer technical specifications:

Total length 2050±5mm (excluding slide sleeve and tubing sub)

Maximum outside diameter of cylinder block 108mm

The maximum diameter of cylinder block is 57mm

Working setting pressure 16±1MPa (4 scissors)

Rated working pressure 50MPa

Operating temperature 120℃

The sealing section is 400mm long

Unsealing shear pin 8*3 each 10Kn adjustable

Lifting and unsealing distance 100mm

4. Use method:

1, according to the design and process requirements, select the packer and supporting tools, and arrange the pipe string according to the requirements.

2. The liquid in the pipe column is pressed to 4±0.5MPa, and the liquid is pushed to open the rubber cylinder in the annular cavity between the center tube and the rubber cylinder through the liquid inlet hole. The rubber cylinder begins to expand, and the liquid inlet channel is closed and set after being pressed to 16-20MPa.

3. Lifting and unlocking, unlocking tonnage is adjustable.