Drilling Manual's Post

Casing deformation and tubing eccentricity are a significant concern in the oil and gas industry for safety and operational reasons. These issues can arise from various sources like well completion, corrosion, formation swelling, collapse, salt dome creep, etc. It is essential to implement a well-integrity surveillance program that covers all the casing and tubing strings throughout the entire well life-cycle, from initial completion to abandonment. But is it possible to evaluate the condition of the casing string for deformation and eccentricity through the tubing string? A new Deformation-and-Eccentricity (DEC) tool was introduced in the oil field, which uses electromagnetic technology to measure casing deformation and tubing eccentricity while logging inside the completion tubing. The DEC tool generates a unique compressed-and-focused magnetic field that provides an increased signal-to-noise ratio (SNR) and employs an array of magnetic sensors to measure the magnetic flux density distributions azimuthally around the tool. The tool&#;s compressed and focused magnetic field is designed to perform three functions: 1) Saturate the magnetic flux of the tubing 2) Inject more magnetic flux into the first casing behind the tubing 3) Increase signal measurement sensitivity and SNR. The sensor matrix measures flux density changes, which correspond to variations in the distance between tubing and casing. The high-resolution azimuthal magnetic sensor matrix delivers high-accuracy measurements, which are used to image the flux density changes. DEC has a built-in orientation measurement based on gyro and accelerometers that are used to align the deformation and eccentricity images and index curves, as well as the tubing thickness image. The tool specifies a 1% eccentricity ratio and 5% deformation ratio accuracy in the range of casing OD up to 13-3/8&#;. When combined with other well-integrity measurements such as multi-finger calipers and multi-pipe thickness log tools, a complete well-integrity evaluation can be achieved throughout the life cycle of a well. For example, significant casing deformation can often indicate the potentially damaged cement behind the casing. Other applications for the technology include tubing clamp location for fiber-optics cables and control lines, the orientation of multi-string tubing completions, etc. The performance of the tool has been validated through research simulations, lab tests, and field trials. The attached paper in the source below includes a field case study of a deviated gas production well with tubing buckling and casing micro-dogleg. Source: https://lnkd.in/dTCz9c8Y Credit: Hany Metwally Free PDFs: Download free books on drilling and related topics from the Drilling Manual Telegram channel at https://lnkd.in/dgnyhW2Q Learning Videos: Watch educational videos on drilling techniques, equipment, and more on the Drilling Manual YouTube channel at https://bit.ly/3pKS5dd Download Free Books: http

HEGONG SPRING supply professional and honest service.

Conventional rotary drilling is the most common type of drilling used in the oil and gas industry. It involves rotating a drill bit at the end of a drill string to penetrate the earth. The drill string is made up of a series of hollow pipes that are connected together. Drilling fluid is pumped down the drill string and out of the drill bit to cool and lubricate the bit, remove cuttings, and maintain hydrostatic pressure.

The drill bit is rotated by a top drive, which is a powerful electric motor that is mounted at the top of the drill rig. The top drive transmits torque through the drill string to the drill bit. As the drill bit rotates, it cuts into the earth, creating a wellbore.

Advantages and Disadvantages of Conventional Rotary Drilling

Advantages of Conventional Rotary Drilling

Versatile and reliable: Conventional rotary drilling can be used to drill a wide variety of wells, including oil and gas wells, water wells, geothermal wells, environmental wells, and construction wells. It is also well-suited for drilling in a variety of formations, from soft to hard.

Relatively simple and inexpensive: Conventional rotary drilling is a relatively simple and inexpensive drilling method. The equipment and expertise required are widely available, and the drilling process is well-understood.

Disadvantages of Conventional Rotary Drilling

Can be slow and expensive, especially when drilling deep wells: Conventional rotary drilling can be a slow and expensive process, especially when drilling deep wells. The drill bit must be rotated continuously, and a large amount of drilling fluid must be pumped down the wellbore.

Not well-suited for drilling in complex or challenging formations: Conventional rotary drilling is not well-suited for drilling in complex or challenging formations, such as formations with high levels of H2S or formations with narrow pressure margins. In these cases, more specialized drilling methods are required.

If you are looking for more details, kindly visit downhole drilling.

Alternatives to Conventional Rotary Drilling

In recent years, a number of alternatives to conventional rotary drilling have been developed. These alternatives are designed to improve the efficiency and effectiveness of drilling, particularly in complex or challenging formations.

Some of the most common alternatives to conventional rotary drilling include:

1. Directional drilling: Directional drilling allows operators to drill wells that deviate from the vertical plane. This is useful for drilling wells that target reservoirs that are located at an angle or that are buried deep below the surface. Directional drilling can also be used to drill multiple wells from a single drilling pad.
2. Horizontal drilling: Horizontal drilling is a type of directional drilling that is used to drill wells that are parallel to the surface. This is useful for drilling wells in unconventional reservoirs, such as shale and tight oil formations.
3. MPD (Managed Pressure Drilling): MPD is a technique that allows operators to precisely control the pressure in the wellbore. This is useful for drilling in wells with narrow pressure margins or in wells with high levels of H2S (hydrogen sulfide).
4. UFD (Underbalanced Drilling): UFD is a technique that involves drilling a well with a lower pressure in the wellbore than the pressure in the surrounding formation. This is useful for drilling in wells with high reservoir pressure or in wells with low permeability.
5. Coiled tubing drilling (CTD): CTD is a method of drilling that uses coiled tubing instead of drill pipe. This is useful for drilling in shallow wells or in wells with complex trajectories.
6. Percussion drilling: Percussion drilling is a method of drilling that uses a hammer to drive a drill bit into the ground. This is useful for drilling in hard formations or in formations with a lot of debris.
7. Laser drilling: Laser drilling is a method of drilling that uses a laser to cut through the formation. This is useful for drilling in very hard formations or in formations that are sensitive to heat.

Application of Oil and Gas Drilling Simulation

Oil and gas drilling simulation is a powerful tool that can be used to improve the safety, efficiency, and cost-effectiveness of drilling operations. It can be used to:

1. Plan and design wells: Drilling simulation can be used to model the drilling process and predict the performance of different drilling methods and equipment. This information can be used to design wells that are optimized for safety, efficiency, and cost.
2. Train drill crews: Drilling simulation can be used to train drill crews on how to operate different drilling equipment and respond to different drilling scenarios. This can help to improve safety and efficiency on the drilling rig.
3. Monitor and troubleshoot drilling operations: Drilling simulation can be used to monitor drilling operations in real time and identify potential problems before they occur. This can help to prevent drilling accidents and reduce costs.
4. Optimize drilling parameters: Drilling simulation can be used to optimize drilling parameters, such as weight on bit, rotary speed, and mud flow rate. This can help to improve drilling performance and reduce costs.

Conclusion

Conventional rotary drilling is the most common type of drilling in the oil and gas industry, but it has limitations. Alternatives, such as directional drilling, horizontal drilling, managed pressure drilling, and underbalanced drilling, offer advantages such as improved efficiency, increased production rates, and reduced risk.

Oil and gas drilling simulation is a powerful tool that can improve the safety, efficiency, and cost-effectiveness of drilling operations by planning and designing wells, training drill crews, monitoring and troubleshooting drilling operations, and optimizing drilling parameters.

The future of oil and gas drilling is likely to be characterized by a continued shift towards more advanced and efficient drilling methods, with alternatives to conventional rotary drilling and oil and gas drilling simulation playing a major role.

Contact us to discuss your requirements of volute spring products. Our experienced sales team can help you identify the options that best suit your needs.