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Домой > продукты > Центраторы обсадных колонн > Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD

Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD

Подробная информация о продукции

Place of Origin: China

Фирменное наименование: ZS

Сертификация: API 11B

Model Number: ZS

Условия оплаты и доставки

Minimum Order Quantity: 1

Цена: US$160

Packaging Details: wooden case

Delivery Time: 15says

Payment Terms: T/T

Supply Ability: 5000

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Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD
Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD
Product Description

For horizontal wells with long laterals, tortuous boreholes, and severe well geometries (including high doglegs), our unibody bow spring centralizers are the ideal choice. The one-piece, non-welded construction eliminates weak points, allowing for confident casing string rotation and reciprocation in tight wellbore situations.

During casing rotation operations, these centralizers remain in place while the pipe rotates inside them. This agitation capability during cementing operations improves cement bond and long-term cement integrity.

Unibody bow springs act as semi-rigid centralizers, designed to be slightly under gauge to minimize drag while offering both flexibility and high restoring force. They compress and deform to navigate restrictions, then revert to their original form without permanent deformation.

Key Benefits
  • Eliminates weak points with unibody construction
  • Maintains position during casing rotation
  • Improves cement bond and integrity
  • Flexible yet maintains high restoring force
  • Compresses through restrictions without permanent deformation
How Centralizers Minimize Casing Wear
  • Preventing Eccentricity: Maintains casing in wellbore center for uniform wear distribution
  • Minimizing Contact: Creates consistent gap between casing and wellbore wall
  • Enhancing Cement Coverage: Ensures uniform cement protection around casing
  • Supporting Weight Distribution: Prevents localized stress concentrations
  • Facilitating Fluid Movement: Helps flush away debris and cuttings
  • Improving Wellbore Stability: Prevents casing buckling and sticking
Technical Specifications
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 5-7 50-60 650±50 225±5 5
6*8-1/2 154-158 5-7 50-60 650±50 255±5 5
13-3/8*17-1/2 342-349 8 50-60 580 450±5 6
20*26 510-518 8 50-60 650±50 670±5 10
Product Images
Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD 0 Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD 1 Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD 2
Packaging & Shipping

Rigid Roller centralizer used in deep water Horizon Well packing: wooden case

Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD 3 Unibody Bow Spring Casing Centralizers Flexible-spring Centralizers for 13 3/8 Casing STD 4
Company Information

Puyang Zhongshi Group Company Ltd was founded in 1996, as the restructured enterprise of Central Plains oilfield branch company of SINOPEC. With registered capital of 6083 million yuan and annual output value of 200 million yuan, we employ 580 staff including more than 160 technical and administrative personnel.

Our oil machinery products include pumping units, subsurface sucker rod pumps, wellheads (Christmas Trees), pressure vessels, drilling solid control series products, and cementing accessories. We attained ISO 9001 certification in 1998 and API Certificates in 2002.

  • 9 factories with over 500 employees
  • Certifications: API 5CT, 6A, 10D, 11AX, 11E, ISO 14001 and 9001
  • 10 years exporting experience to 30+ countries including USA, Canada, Russia, and Middle Eastern markets
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