Downhole Tools-Hydraulic Expansion External Casing Packer

2. Structure and working principle

It uses expanded steel frame rubber as the sealing element and is a permanent enclosure

The packer, which is controlled by a combination valve. It consists mainly of valve joints,

Rubber assembly, center pipe, nipple, coupling, etc. During construction, when rubber

The plug passes through the valve joint and the rod in the sealed inlet hole disconnects, opening the inlet hole. What time

The rubber plug goes to the spoiler and starts building pressure in the casing. Fluid enters the open valve from the following positions

When the pressure of the valve joint reaches the design requirement, cut the pin on the opening valve to achieve opening

Open the valve.

The fluid enters the cavity between the centers through the check valve and the pressure limiting valve

Pipe and rubber. The packer then expands and closes the seal from the wellbore wall. When the expansion

Cavity pressure reaches pressure limiting valve needle design, needle break, pressure

The limit valve moves to close the inlet hole to achieve sealing safety. The well's mouth

Release pressure to 0 and open the valve to self-lock for permanent closure. Downhole pressure

The operation is not affected by the packer.

In particular string precession, it can run the inner pipe tool to set the packer to achieve this

Special completions (e.g., through packers or packer screens).

Characteristics of 3.

1) Simple operation, no need to change the original operation process.

2) Better adaptability for oil/water Wells under a variety of conditions.

3) The valve system provides effective protection and precise control of tools for safe Settings.

4) Large expansion coefficient, small diameter rubber barrel can be well sealed large diameter. When using a 70mm packer in a 7 "housing, the breakdown pressure is up to 28 MPa.

5) Small residual deformation.

6) High temperature resistance, can withstand large pressure difference, small residual deformation.

7) The sealing section is long and the setting is reliable.

Packaging

After Sales Warranty

1) Simple operation, no need to change the original operation process.

2) Better adaptability for oil/water Wells under a variety of conditions.

3) The valve system provides effective protection and precise control of tools for safe Settings.

4) Large expansion coefficient, small diameter rubber barrel can be well sealed large diameter. When using a 70mm packer in a 7 "housing, the breakdown pressure is up to 28 MPa.

5) Small residual deformation.

6) High temperature resistance, can withstand large pressure difference, small residual deformation.

7) The sealing section is long and the setting is reliable.