Product Summary
Centek's radical innovation in 2001 led to the development of a range of centralizers with superior downhole performance. These products have significantly reduced failures and have consistently saved operators time and costs over the past 20 years in reaching Total Depth (TD).
Bringing excellence to the business was challenging; staying there is tough. However, being an industry leader is far more rewarding than merely following others. As sector forerunners, we've changed perceptions, standards, and quality, setting benchmarks and creating a new category of centralizers. This ongoing innovation has cemented our reputation as global market leaders.
All Centek centralizers deliver performance in 6 key areas, optimizing:
- Strength
- Flexibility
- Runability
- Flow by Area
- Pipe Rotation
- Stand-off
A full string offer
We offer a comprehensive range of bow spring and solid body centralizers, along with slip-on and latch-on stop collars. Our commitment is to work closely with you to select the best-fit product that balances performance with economic considerations.
Our deep understanding of regional needs and the centralizer market allows us to tailor our products to meet specific demands, ensuring we fulfill the unique requirements of each region. Our new range of welded and solid products offers Centek quality at a competitive price point, designed especially for less challenging wells.
All our products are meticulously built to perform as specified on their datasheets, and our bow spring products undergo rigorous testing beyond API standards.
Ratings
Centralization and ease of running casing are critical factors, balancing strength and flexibility for optimal "runability." To aid product selection, we've introduced ratings for flexibility, runability, and inherent strength. These ratings help in choosing the right product for the job, considering both cost-effectiveness and the challenges of the well section.
Centek Single Piece Centralizers
Revolutionary design and innovation
Centek's single-piece centralizers represent a revolutionary design and innovation in the industry. These units are robust and ultra-high-strength, designed to maintain centralizer integrity while providing maximum stand-off and eliminating cement channeling. Their patented bow spring design ensures flexibility in tight spots without compromising performance integrity, marking the most significant advancement in centralizer technology in over four decades.
Flexibility through under gauge conditions
Flexibility is crucial in under-gauge conditions to prevent centralizer damage or stuck pipes, which can incur significant costs. Our single-piece units enhance Running In Hole (RIH) capability due to their construction and flexibility, compressing to nearly flat conditions under restrictions and expanding to fit open or cased hole IDs without damage.
Benefits of downhole flexibility:
1. Enhanced RIH in localized restrictions
2. No additional bit run
3. Centralizer integrity maintained
Flow by Area
Flow by area displacement relates directly to fluid regimes, such as volumes, velocity, density and pressure, which have a significant impact on primary cementing operations. Field results repeatedly show our bow spring centralizers significantly improve annular flow by area.
Pipe rotation
Pipe rotation is of critical importance when carrying out primary cement jobs. The aim is to agitate the pipe to enhance the cement displacement efficiency, improving mud removal and therefore providing a good cement bond and long term zonal isolation. Centek bow spring centralizers have been designed to greatly aid pipe rotation. The design of the centralizer allows a well centralized pipe to rotate inside the centralizer due to its extremely low coefficient of friction, while the centralizer is held in position against the borehole wall.
Using Centek centralizers can provide:
- Enhanced rotation due to optimized centralization
- Improved well clean out
- Superior cement job and good zonal isolation
- Minimum rotational torque loses
- Minimize stall out effect
Standoff
API defines standoff as ‘the smallest distance between the OD of the casing and the wellbore’. Standoff ratio is the ratio of standoff to the annular clearance for perfectly centered casing, expressed as a percentage. Standoff is a measure of pipe eccentricity. In a static condition, when casing is perfectly centered, standoff will be 100%. The degree of standoff achieved by the centralizer is a critical factor while running casing and tubing when the objective is a good cement job. Pipe centralization (standoff) has a major impact in many areas, but in cementing operations, it will directly affect displacement efficiency.
Optimum displacement is an industry-wide challenge for primary cementing. Factors that influence displacement efficiency of fluids are typically:
- Well geometry
- Pipe centralization
- Pipe movement
- Fluid velocity
- Fluid properties
- Fluid regimes
- Fluid volumes
- ECD constraints vs loss of circulation
All Centek single-piece centralizers offer optimum standoff capability in most well conditions due to their robust yet flexible performance, providing enhanced results against all these factors. Improved standoff quickly translates into improved:
- RIH (Running In Hole)
- Cementation operations
- Pipe centralization
- ECDs (Equivalent Circulating Density), which may allow increased pump rates
- Well clean-out
Optimum standoff also results in reducing cement channeling and remedial works, in addition to minimizing low points of pipe in the well.
Product range by style, application and performance
For more information on our products talk to our Product Service Experts today or use our Product Selector Tool to find the right product for your application.