When the drill tool is lifted out of the hole, a blowout could happen due to suction. In event of a blowout, the open position of the IBOP valve allows backflow, easing the installation process. Upon successful installation, the valve can be promptly closed with a relief rod to prevent further backflow. Fluid can then be pumped in from the surface to discharge the IBOP and drill string. The purpose of blowout prevention can be achieved by the following generic steps: discharging the relief sub; regulation of fluid; commence pump circulation.We produce H2S resistance Inside Bop Valves, which adopt high-quality import sulfur-resistance material.
The IBOP (Inside Blowout Preventer), also known as Gray Valve or BVR, is a high-pressure, non-return valve integrated into the drill string. It plays a critical role in well control by preventing uncontrolled flow of formation fluids upward through the drill pipe. Installed near the surface, the IBOP provides a reliable safety mechanism during drilling and tripping operations, particularly in kick or blowout scenarios.
This tool is essential during lifting operations when the potential for blowouts exists due to suction effects. The IBOP's open configuration allows for initial backflow during installation and then can be manually closed using a relief rod to contain the well pressure. Fluid can be pumped into the string post-closure to manage pressure and continue safe operations.
Our company manufactures IBOPs using H₂S-resistant alloy materials per NACE MR0175 standards, ensuring superior performance in sour gas environments.
Two-piece body construction with full drift bores
Available in a wide range of sizes and thread connections
Identifiable OPEN/CLOSE markings for easy operation
High-pressure capability up to 70 MPa (10,000 psi)
Operating wrench and thread protectors included
Supplied with certified test reports
H₂S corrosion resistance available (NACE MR0175)
Major repair kits available for every model
High-pressure rating with precise engineering
Simple manual operation for immediate sealing
Low-torque sealing mechanism for ease of use
Enhanced reliability in deep drilling applications
Maintenance-friendly with replaceable internal parts
| Operation Stage | Action |
|---|---|
| Installation (open) | Allows backflow during insertion |
| Engagement (close) | Relief rod used to shut off backflow and contain pressure |
| Circulation & Recovery | Fluid pumped from the surface to regain well control |
| Pressure Management | Fluid regulation and circulation helps displace formation pressure safely |
| Thread Connection | O.D. (mm / inch) | I.D. (mm / inch) | OAL (mm / inch) | Working Pressure (MPa) |
|---|---|---|---|---|
| NC26 | 88.9 / 3-1/2 | 31.75 / 1-1/4 | 686 / 27 | 70 (35) |
| NC26 | 95 / 3-3/4 | 35 / 1-3/8 | 660 / 26 | 70 (35) |
| NC31 | 104.8 / 4-1/8 | 41.3 / 1-5/8 | 711 / 28 | 70 (35) |
| NC31 | 111 / 4-3/8 | 35 / 1-3/8 | 670 / 26-3/8 | 70 (35) |
| NC38 | 120.1 / 4-3/4 | 50 / 2 | 762 / 30 | 70 (35) |
| NC38 | 121 / 4-3/4 | 45 / 1-49/64 | 685 / 26-31/32 | 70 (35) |
| NC46 | 158.75 / 6-1/4 | 61.9 / 2-7/16 | 838 / 33 | 70 (35) |
| NC50 | 159 / 6-1/4 | 57.2 / 2-1/4 | 760 / 29-59/64 | 70 (35) |
| NC50 | 165 / 6-1/2 | 57.2 / 2-1/4 | 760 / 29-59/64 | 70 (35) |
| NC50 | 168.28 / 6-5/8 | 71.4 / 2-13/16 | 838 / 33 | 70 (35) |
| 5-1/2FH | 177.8 / 7 | 76.2 / 3 | 889 / 35 | 70 (35) |
| HT55 | 177.8 / 7 | 57.2 / 2-1/4 | 998 / 38-57/64 | 70 (35) |
| 6-5/8REG | 203.2 / 8 | 76.2 / 3 | 965 / 38 | 70 (35) |
| 6-5/8REG | 203.2 / 8 | 71.4 / 2-13/16 | 998 / 38-57/64 | 70 (35) |
| 7-5/8REG | 241 / 9-1/2 | 71.4 / 2-13/16 | 998 / 38-57/64 | 70 (35) |
| 7-5/8REG | 241 / 9-1/2 | 76.2 / 3 | 965 / 38 | 70 (35) |
The IBOP, also known as an Inside Blowout Preventer, Gray Valve, or BVR (Back Pressure Valve), is essential in maintaining control during drilling operations. Its primary function is to prevent the uncontrolled upward flow of fluids through the drill string in case of a well control event. This valve is strategically installed in the drill string and remains open under normal conditions. If a kick or blowout is detected during pipe retrieval, the valve can be manually closed to isolate well pressure.
Key advantages include:
High-pressure handling capabilities
Reliable sealing mechanisms
Fast deployment
Robust mechanical structure suitable for rugged environments
The IBOP is also particularly valuable during operations involving sour gas or H2S-bearing formations. Our company manufactures H2S-resistant IBOPs using high-grade imported sulfur-resistant alloys, ensuring safety and compliance even in extreme environments.
Application Scope: Ideal for drilling, workover, and completion operations across onshore and offshore fields.
Optional Enhancements: Sour gas compatibility, premium thread connections, and customization for pressure ratings.
Compliance: Fulfills industry standards including API and NACE MR0175.
Availability: In-stock for all major thread sizes and connection types.
Packaging: Each unit is delivered with full documentation, a test certificate, thread protectors, and wrench for immediate operation.
Better Petro is a trusted supplier specializing in providing high-quality spare parts for Drill Collar and Drill Pipe,C and Type Pneumatic Elevator. With a strong focus on reliability and efficiency, we offer a comprehensive range of replacement components for the Christmas Tree Varco Top Drive model’s BOP control line. Our products are engineered to meet the demanding standards of the oil and gas industry, ensuring optimal performance and reduced downtime during critical operations.
Better Petro maintains an extensive inventory of in-stock parts, Companion Flange, Double Studded Adapter, and electronic components, ready to ship to meet urgent requirements. Each part is meticulously sourced and rigorously tested to ensure compatibility and durability under extreme drilling conditions. By partnering with Better Petro, clients gain access to superior service, competitive pricing, and the assurance of keeping their drilling operations running smoothly and efficiently.
