Steerable Drilling Liner Technology Successfully Mitigates Formation Stability Issues

Eidem, Morten; Grindhaug, Gaute; Spreckelmeyer, Niko; Regener, Thorsten; Clemmensen, Carl Christian

doi:10.2118/171846-ms

Steerable Drilling Liner Matches the Industry's Common Theme Regarding Cost Optimization Approaches and minimize Geomechanics Related Challenges; Technology Overview, Applications and Limitations

Sherbeny

¹

,

Biscaro

²

,

Ibrahim

³

et al. 2015

Day 2 Tue, September 15, 2015

0

View full text Add to dashboard Cite

Because fracture gradient changes with rock type, some formations are more sensitive to induced fractures than others. Depending upon depth, the fractures created will either be horizontal or vertical. If the depth is 2500 feet or less, horizontal fractures are usually produced. Because horizontal fractures require lifting the entire overburden, they are limited to shallow depths. At depths over 3500 feet, fractures are usually vertical. Because vertical fractures occur without lifting the overburden, they can be created at much lower pressure. The propagation pressure is generally much less than the pressure that would be required to initiate the fracture. Consequently, fracture losses, once initiated, are difficult to control. Wellbore instability, particularly in shale formations, is a major challenge in drilling operations. Many factors such as rock properties, in-situ stresses, chemical interactions between shale and drilling fluids, and thermal effects must be taken into consideration in well trajectory designs and drilling fluid formulations to mitigate wellbore instability-related problems. The Steerable Drilling Liner service combines a rotary steerable system with a liner to help overcome the challenges: drilling in zones with lower pressure and unstable shale/coal layers, and with formations of varying flow and pressure regimes. Running the liner while drilling keeps the wellbore stable and eliminates the need to pull the drillstring to run casing. This is how it reduces your risks and NPT, saving the costs associated with contingency plans. Because the liner is isolated from the reamer shoe, you can rotate the liner at much lower RPMs than the pilot and reamer bits. This design lessens the load on the liner, improving its fatigue life. The Steerable Drilling Liner steerable drilling liner service helps you to mitigate the risk of hole collapse and formation damage by reducing openhole exposure, Reduce NPT by eliminating extra trips and ensuring that the liner is installed at TD from the first run Enhance wellbore integrity by drilling with the liner, leading to the plastering effect, which reduces fluid loss and cuttings volume, Lower health, safety, and environmental (HSE) risks by reducing pipe handling and rigsite footprint size Steerable Drilling Liner service developed and qualified using a rigorous processes including extensive onshore testing at the service provider Experimental Test Area (BETA) facility before being successfully deployed offshore. Rely on Steerable Drilling Liner service performance in extreme environments; the cost-effective Steerable Drilling Liner service promotes wellbore stability and performs reliably in the challenging downhole environments. This Paper will reveal the technology overview, updates, case histories and field limitations

show abstract

Steerable Drilling Liner Matches the Industry's Common Theme Regarding Cost Optimization Approaches and Minimize Geomechanics Related Challenges; Technology Overview, Applications and Limitations

Sherbeny

¹

,

Dabyah

²

,

Ghai

³

et al. 2015

Day 3 Wed, November 11, 2015

0

View full text Add to dashboard Cite

Because fracture gradient changes with rock type, some formations are more sensitive to induced fractures than others. Depending upon depth, the fractures created will either be horizontal or vertical. If the depth is 2500 feet or less, horizontal fractures are usually produced. Because horizontal fractures require lifting the entire overburden, they are limited to shallow depths. At depths over 3500 feet, fractures are usually vertical. Because vertical fractures occur without lifting the overburden, they can be created at much lower pressure. The propagation pressure is generally much less than the pressure that would be required to initiate the fracture. Consequently, fracture losses, once initiated, are difficult to control. Wellbore instability, particularly in shale formations, is a major challenge in drilling operations. Many factors such as rock properties, in-situ stresses, chemical interactions between shale and drilling fluids, and thermal effects must be taken into consideration in well trajectory designs and drilling fluid formulations to mitigate wellbore instability-related problems. The Steerable Drilling Liner service combines a rotary steerable system with a liner to help overcome the challenges: drilling in zones with lower pressure and unstable shale/coal layers, and with formations of varying flow and pressure regimes. Running the liner while drilling keeps the wellbore stable and eliminates the need to pull the drillstring to run casing. This is how it reduces your risks and NPT, saving the costs associated with contingency plans. Because the liner is isolated from the reamer shoe, you can rotate the liner at much lower RPMs than the pilot and reamer bits. This design lessens the load on the liner, improving its fatigue life. The Steerable Drilling Liner steerable drilling liner service helps you to mitigate the risk of hole collapse and formation damage by reducing openhole exposure, Reduce NPT by eliminating extra trips and ensuring that the liner is installed at TD from the first run Enhance wellbore integrity by drilling with the liner, leading to the plastering effect, which reduces fluid loss and cuttings volume, Lower health, safety, and environmental (HSE) risks by reducing pipe handling and rigsite footprint size Steerable Drilling Liner service developed and qualified using a rigorous processes including extensive onshore testing at the service provider Experimental Test Area (BETA) facility before being successfully deployed offshore. Rely on Steerable Drilling Liner service performance in extreme environments; the cost-effective Steerable Drilling Liner service promotes wellbore stability and performs reliably in the challenging downhole environments. This Paper will reveal the technology overview, updates, case histories and field limitations

show abstract

Implementing Liner Drilling to Achieve Increased Well Construction Robustness

Grindhaug

¹

,

Wenn

²

,

Eidem

³

et al. 2017

Day 2 Thu, November 02, 2017

0

View full text Add to dashboard Cite

Casing and liner drilling is widely regarded as a method to overcome challenges related to formation instability. Its use and experience is gradually gaining foothold as its benefits and functionality in many cases can be the solution and risk mitigation to overcome some of the Oil & Gas industry's challenges related to drilling wells with narrow drilling margins, depletion and formation instability challenges in traditional well construction. The technology has now been matured over the last 5+ years and, even though the full potential has yet to be fully explored, several "un-drillable" wells have been made drillable by using its ability to combine the drilling and logging in complex 3D wells while simultaneously securing the wellbore. The second generation of the technology is currently being field trailed as 7in system, but several different configurations are already available, including a 6 × 8 ¾″ Integrated Underreamer, inner BHA repositioning functionality to remove 6″ rathole for the BHA along with several simple but very robust solutions for liner reaming purposes. The traditional Steerable Drilling Liner System (SDL) is available for 8 ½ and 12 ¼″ holes sizes, whereas the second generation will initially be available for 8 ½ – 8 ¾″ hole sizes. This paper will focus on benefits and experiences from using the technology along with an update on the new features that is gradually being made available as part of the second generation SDL technology.

show abstract

Steerable Drilling Liner Technology Successfully Mitigates Formation Stability Issues

Cited by 3 publications

References 1 publication

Steerable Drilling Liner Matches the Industry's Common Theme Regarding Cost Optimization Approaches and minimize Geomechanics Related Challenges; Technology Overview, Applications and Limitations

Steerable Drilling Liner Matches the Industry's Common Theme Regarding Cost Optimization Approaches and minimize Geomechanics Related Challenges; Technology Overview, Applications and Limitations

Steerable Drilling Liner Matches the Industry's Common Theme Regarding Cost Optimization Approaches and Minimize Geomechanics Related Challenges; Technology Overview, Applications and Limitations

Implementing Liner Drilling to Achieve Increased Well Construction Robustness

Contact Info

Product

Resources

About