API Oilwell Casing Composite Roller Type Centralizer

• Certification: ISO 9001:2000, ISO 9001:2008
• Surface Treatment: Spray-Paint
• Centralizer Type: Rigid
• Structure: Slider
• Material: Plastic
• Type: Centralizer
• Model NO.: 4 1/2"-20"
• Sample: Available
• ODM: Acceptable
• OEM: Acceptable
• Drawing: Available
• Markings: Available
• Rollers: 15PCS
• Blades: Spiral and Straight
• Height: 200mm
• Color: Black
• Delivery: Depend on Quantity
• Transport Package: Wood Cases
• Specification: 4 1/2"-20"
• Trademark: ZS
• Origin: China
• HS Code: 843143100
• Production Capacity: 2000PCS/Month

Product Description

API Oilwell Casing  Composite Roller Type Centralizer

Rigid centralizer
Rigid casing centralizer is used in deviated wells and horizontal wells. There are several blades on the rigid centralizer that can keep casing from contacting the wellbore wall

Roller rigid centralizer which is most suitable for highly deviated wells and horizontal wells has two or three rollers in each blade. It can change slipping friction to rolling friction, so the Roller rigid centralizer greatly reduces the friction between casing and wellbore wall and let casing go to desired position smoothly
 
Cast aluminum centralizer:
The smooth spiral 360 overlap solid vane design of centralizers provide max wall contact will not damage wellhead equipment, has high impact and shock resistance comand fluid swirl. The 30slope from the body to the height of the vane will eliminate scraping, or digging into the formation.
The solid cast aluminum centralizers bine with high tensile and yield strengths

 
Our advanced thermoplastic  centralizers are light weight, highly durable and exhibit ultra low friction factors. They are made from proprietary composite material formulations  .

Fuction of casing centralizer:

1. Take casing to designed position by reducing sticking while casing going down.

2. Centralize casing in well.

3. Balance liquid pressure in annular space by reducing adhesion phenomenon.

4. Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect.

Casing centralizers help center the casing in the wellbore during the cementing operations, allowing the cement to be evenly distributed around the casing string. The degree to which the casing is centered (standoff) depends on the performance of centralizer and the spacing between the centralizers installed on the casing OD.

 

7) Function

a. Take casing to designed position by reducing sticking while casing going down.
b. Centralize casing in well.
c. Balance liquid pressure in annular space by reducing adhesion phenomenon.
d. Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect.

 

8) Features of Bow Spring Casing Centralizers:

a. Designed for high restoring force and low starting & running force

b. The larger bows provide complete centralization in vertical or slightly deviated wells.

c. Due to the flexibility of bows, they can pass through narrow hole sections and expand in the targeted locations.

d. Undergo special coating process to prevent from rust

e. For hinged bow spring casing centralizers, end collars are designed with self-locking action, which are easy to assemble and can be shipped in half assembled condition for less shipping and storage costs.

 

9) Features for Solid Rigid Casing Centralizers:
a. Shock, impact and corrosion resistant.
b. High tensile and yield strengths.
c. Available with straight or spiral blades.
d. Helps ensure positive centering in deviated or horizontal holes.
e. Helps prevent differential sticking while running casing.

The purpose of the Bow Spring Centralizer, both welded and non-welded, is to help center the casing in the wellbore, allowing even distribution of the cement around the casing during cementing operations. The degree to which the casing is centered depends on the performance of the centralizer and the spacing between the centralizers installed on the casing OD. Bow Spring Centralizers also help reduce casing drag in the wellbore during running operations and prevent differential stroking of the casing. They increase fluid turbulence at the tool, helping to move filter cake from the wellbore. Both welded and non-welded Bow Spring Centralizers can be run through hole restrictions in the bore hole or smaller casing strings that are cemented in the well, which in turn centers the casing below the restriction

Our composite centralizers provide the following benefits:
Reduce total well construction costs - eliminate the need for expensive casing couplings
Enables casing or screen deployment in longer reach wells - industry leading low friction factors reduce torque and drag, enabling the user to reach total depth
Zero corrosion - totally non-metallic material removes the contamination risk to carbon or expensive hi-chrome content steel tubulars and completion equipment
Low wear and material loss - low friction factors and advanced material formulations result in low wear
High impact and side load resistance -  longer lasting
Light weight - the size to weight ratio is significantly lower than metallic centralizers which reduces freight and handling costs
Specific OD's can be accommodated - composite material can be machined down to meet requirements.
Features
Spiral blade configuration - provides for optimal stand-off and assists turbulent flow during cementing operations
Zero porosity construction
Suit casing ranges from 4.5 to 10.75 inches
Manufactured to strict ISO 9001-2000 quality standards
Tested to API 10TR5
main specifications for reference:

Model(in)	Hooping In-Dia.(mm)	Hooping  thickness  (mm)	Hooping height(mm)	Total Length(mm)	Max. Out-Dia.(mm)	Spring  Pieces
5-1/2*8-1/2	142-148	3-5	90-120	650±50	225±5	5
7*9-5/8	181-186	3-5	90-120	650±50	255±5	6
7*8-1/2	181-186	3-5	90-120	650±50	235±5	6
8-5/8*12-1/4	223-228	3-5	90-120	650±50	330±5	8
9-5/8*12-1/4	250-255	3-5	90-120	650±50	330±5	8
10-3/4*12-1/4	274-276	3-5	90-120	650±50	330±5	9
13-3/8*17-1/2	342-347	3-5	90-120	650±50	450±5	11
18-5/8*24	476±1	3-5	90-120	600±50	610±5	12
20*26	510±1	3-5	90-120	600±50	660±5	12

This centralizer is the option for ultimate friction reduction, offering field proven lower friction co-efficient leading to superior drag and rotational torque reduction. It extends the current well construction boundaries on ERD and highly deviated wells.
The tool is made from a high temperature high-pressure injection moulded polymer.
• It is available in BOS21 standard grade polymer composite for most low friction requirements as well as BOS22 self lubricating polymer composite for low friction water based mud applications.
• The tools are available in Spiral (22-25°) or Passive (5°) angle bladed. configurations. Both blade styles are watermelon shaped to pass through casing and multi-lateral windows, washouts and tight spots.