1.Working principle of sleeve stabilizer
Sleeve stabilizer is a downhole tool used in oil, gas, or geothermal drilling operations. Its main function is to ensure the correct alignment of casing in the wellbore, improve cementing quality, and ensure the stability of downhole equipment operation. Its working principle is as follows:
l Positive function:
The sleeve stabilizer is installed on the casing or drilling tool, and is in contact with the wellbore wall through its external blades, elastic structure or roller components to reduce the offset between the casing and the wellbore wall, keep the casing at the center of the wellbore, and improve the quality of cementing.
l Reduce frictional resistance:
Due to the possible presence of doglegs, tilts, or horizontal sections in the wellbore, the casing will experience significant frictional forces during insertion. Some centralizers with rollers or low friction materials can reduce friction and improve the efficiency of casing insertion.
l Improve mud fluidity:
Sleeve centralizer can increase the annular clearance, make the mud flow more evenly, avoid mud channel problems during cement cementing process, and improve cementing quality.
2.Application scenarios of sleeve stabilizer
Sleeve stabilizers are widely used in the following underground operation scenarios:
l Oil and gas drilling
Mainly used for casing alignment in vertical wells, directional wells, and horizontal wells to improve casing insertion efficiency and prevent wellbore collapse.
Suitable for long horizontal sections or high angle wells to improve the stability of casing.
l Cementing operation
Install a stabilizer before cementing to evenly align the casing in the wellbore, optimize the annular flow of cement slurry, reduce cement channel problems, and improve cementing quality.
l Geothermal and deep-water wells
Used in high temperature and high pressure (HPHT) environments to ensure the stability of the casing structure in deep well sections.
Old well repair and sidetracking drilling
During the process of repairing old wells, prevent excessive friction between the casing or drilling tools and the wellbore wall to improve the success rate of drilling.
Different types of sleeve stabilizers, such as rigid stabilizers, elastic stabilizers, rotatable stabilizers, and roller stabilizers, are suitable for different well conditions and operational requirements to ensure the smooth progress of drilling operations.
Post time: Mar-21-2025
