The main purpose of the casing scraper is to remove cement, sand, residual bullets from perforation, scratches, paraffin, burrs, and other attachments on the inner wall of the downhole casing, maintaining the cleanliness of the inner wall of the casing so that various downhole tools can be run in. In addition, packers and similar tools also require a clean mating surface, and the attachments on the inner wall of the casing will hinder the normal operation of these tools.
Technical parameters
| Model | Scraping Range | Connection Thread | Total Length | Inner Diameter (mm) | Number of Scraping Blades | Applicable Casing Specification |
| GX4 1/2 | 92 – 112 | 2 – 3/8REG | 895 | 25 | 2×3 | 4 – 1/2 |
| GR5 | 95 – 118 | NC26 | 895 | 25 | 2×3 | 5 |
| GX5 1/2 | 110 – 133 | 2 – 7/2REG | 1010 | 32 | 2×3 | 5 – 1/2 |
| GX6 5/8 | 136 – 162 | 3 – 1/2REG | 1010 | 32 | 2×3 | 6 – 5/8 |
| GR7 | 142 – 168 | 3 – 1/2REG | 1010 | 32 | 2×3 | 7 |
| GX7 5/8 | 177 – 155 | 3 – 1/2REG (B×B) | 1200 | 38.1 | 2×3 | 7 – 5/8 |
| GX9 5/8 | 209 – 235 | 4 – 1/2REG | 1212 | 57 | 2×5 | 9 – 5/8 |
| GX10 3/4 | 260 – 240 | 6 – 5/8REG | 1500 | 57 | 2×5 | 10 – 3/4 |
| GX13 3/8 | 290 – 330 | 6 – 5/8REG | 1372 | 71 | 2×7 | 13 – 3/8 |
- Product Features
- High-Efficiency Cleaning Capacity
Specifically designed to remove cement residue, sand, perforation shot, burrs, paraffin wax, oxides, and other deposits from the inner wall of the casing, restoring the original diameter of the casing and ensuring unobstructed wellbore flow.
- All-Around Scraping Structure Design
The scraper employs a multi-blade or spiral distribution structure, achieving 360° full-coverage scraping, avoiding cleaning dead zones, and improving the thoroughness of the operation.
- High-Strength Wear-Resistant Materials
The blades and body are made of high-strength alloy steel or wear-resistant materials and undergo heat treatment, possessing excellent wear resistance and impact resistance, suitable for complex downhole environments.
- Strong Flexible Fit
The scraper structure features a degree of flexibility or expandability, automatically fitting the inner wall of casing of different specifications. It effectively cleans even slightly deformed or irregularly worn sections.
- Good Drilling Capacity and Excellent Passability
The compact and rational structure ensures excellent scraping effect while maintaining good passability, allowing smooth passage through couplings, diameter changes, and slightly deformed sections.
- Anti-Stuck Design
Optimized guiding structure and blade layout effectively reduce the risk of stuck pipe, improving downhole operation safety.
- Easy Installation and Operation
It can be run into the well via conventional tubing or drill string connections. Operation is simple, maintenance is convenient, and it is suitable for rapid field deployment.
- Extended Downhole Tool Life
By cleaning the inner wall of the casing, it reduces wear on packers, logging tools, and production tools, extending the overall lifespan of the equipment.
- Scope of Application
- Post-Drilling Cleaning Operations
Used to remove residual cement and impurities after casing cementing, creating favorable conditions for subsequent well completion operations.
- Pre-Completion Treatment
Cleansing the inner wall of the casing before running packers, bridge plugs, and other tools to ensure reliable sealing.
- Well Workover and Maintenance Operations
Removing deposits, scale, and foreign objects before downhole equipment repair or replacement to restore wellbore patency.
- Oil (Gas) Production Stage
Used to remove paraffin wax, scale, and deposits to ensure smooth operation of the production tubing.
- Complex Well Condition Handling
Suitable for complex environments such as wells with uneven wear, severely scaled wells, and post-perforated sections.
- Onshore and Offshore Oil and Gas Wells
Widely used in onshore oil fields, offshore platforms, and deep and ultra-deep well operating environments.
III. Summary of Product Advantages
Thorough Cleaning: 360° scraping without dead angles
High Adaptability: Adaptable to various pipe diameters and well conditions
Safe and Reliable: Anti-jamming design reduces operational risks
High Durability: Made of high-strength wear-resistant materials
Improved Efficiency: Ensures smooth installation and operation of subsequent tools
