Newly Applied BHA Elements Contribute to Mainstreaming of Coiled-Tubing Drilling Applications

Gleitman, D.D.; Hardin, Jim; Hightower, C.M.; Gantt, L.L.; Smith, B.E.; Upchurch, Eric R.; Smith, Matt Baillie

doi:10.2118/35130-pa

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1065-1069 to a stationary body to initiate rotation, the frictional resistance will increase until the movement begins and then abruptly falls to a lower level as the movement continues. The friction coefficient at the point where the motion is impending is referred to as static friction coefficient and is typically about 25% greater than the dynamic friction coefficient after motion begins [6] .Therefore, in the calculation process, it should consider static friction and dynamic friction separately to get the maximum static friction and dynamic friction in the orientation process.…”

Section: Relationship Between Static and Dynamic Frictionmentioning

confidence: 99%

Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Gao

2014

AMR

View full text Add to dashboard Cite

Hydraulic orienter has been widely used to alter the drilling direction downhole in coiled tubing drilling. A problem is encountered in construction field. When torque and drag of bottom hole assembly (BHA) are over the maximum output torque of orienter, This caused that it difficult to orient. Therefore, we need to calculate the maximum torque and drag in the process of orientation, it can provide a theoretical basis for designing and selecting the hydraulic orienter. Compared with the conventional force analysis, this paper additionally considered the case of zero weight on bit (WOB), the impact of the mud viscous forces and the relationship between dynamic and static friction, so that we can get more precise result of force analysis.

show abstract

Section: Relationship Between Static and Dynamic Frictionmentioning

confidence: 99%

Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Gao

2014

AMR

View full text Add to dashboard Cite

show abstract

“…Correlate the hydrajetting device depth to the openhole log by using mud-pulse technology and coiled tubing. 6 During this step, a gamma ray sensor and a mud-pulsing assembly are run below the hydrajetting device ( Fig. 2, Page 10).…”

Section: Cwd Sealant Placement Processmentioning

confidence: 99%

Improved Zonal Isolation Through the Use of Sealants Before Primary Cementing Operations

East¹,

McIntyre²,

Tucker³

et al. 2000

Proceedings of IADC/SPE Drilling Conference

View full text Add to dashboard Cite

TX 75083-3836, U.S.A., fax 01-972-952-9435.References at the end of the paper. AbstractZonal isolation in injection, geothermal, and producing wells is critical both to reservoir evaluation efforts and to operations, but often, cementing between the casing and the wellbore is still the only method of zonal isolation performed in many wells. Although zonal isolation and well diagnostics techniques have improved, primary cementing techniques may be inadequate for some reservoir conditions, resulting in undesirable water flows, gas flows, or both. If zonal isolation is inadequate, then expensive, often complicated remedial cementing work will be needed for improved well and reservoir performance.If conformance technology is applied during the drilling phase, it can improve the performance of primary cementing processes, making them safe and economical. Conformance treatments seal problem intervals before primary cementing, thereby alleviating potential well-control problems. These treatments also help ensure successful primary cementing operations and prevent isolation loss caused by the casing expanding and contracting during production-pressure cycles. The formation itself, rather that the cement sheath alone, becomes the zonal isolation mechanism.During the drilling phase, zonal isolation requires the use of coiled tubing, a hydrajetting device, a depth-correlation device, and a sealant. The sealant should be water-thin during placement, and should become an elastic polymer only after it is set in place. This zonal isolation technique requires an understanding of (1) depth correlation to openhole logs, through the use of mud-pulse technology, and (2) hydrajetting tech-niques that remove mud filter cake while placing the sealant. This paper presents examples of this technique for a 7 7 /8-in. wellbore and a 13 ½-in. wellbore.

show abstract

Newly Applied BHA Elements Contribute to Mainstreaming of Coiled-Tubing Drilling Applications

Cited by 2 publications

References 6 publications

Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Calculation Methods of Orienter Torque and Drag in Coiled Tubing Drilling

Improved Zonal Isolation Through the Use of Sealants Before Primary Cementing Operations

Contact Info

Product

Resources

About