Expandable Tubular Solutions

Филиппов, А. В.; Mack, Robert L.; Cook, Lance; York, Patrick; Ring, Lev; McCoy, Terry L.

doi:10.2523/56500-ms

Cited by 40 publications

(18 citation statements)

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“…4,5,6 Based on the following capabilities, the expandable liner-hanger system appeared to offer the required solutions for the troublesome application:…”

Section: The Expandable Solutionmentioning

confidence: 99%

Expandable Liner Hanger Resolves Sealing Problems and Improves Integrity in Liner Completion Scenarios

Williford

Smith

2007

All Days

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fax 01-972-952-9435. AbstractConventional liner-hanger systems typically rely upon the primary cement job as the main method of sealing the liner/casing overlap, and liner-top packers are run either integrally with the liner hanger or separately in a second trip. In certain applications, however, cementing the complete liner may not be feasible or obtaining a primary cement seal at the liner top may not be achievable; in these situations, a liner-top packer must be used as the primary seal. In cases where the top of cement is above the overlap but below the hanger, the liner top packer is used as a back-up seal for the overlap.Almost all liner-top packers that are run integrally to the liner hanger are set through the application of weight applied through the drill-pipe or landing string. The capability of the liner-top packer to seal with a single element at the maximum pressure rating requires that a sufficient setting force of up to 100,000 lbf be applied through the drill pipe to the packer mechanism. Work performed in Latin America recently showed the limitations of this process and how shallow linertop installations might not have the string weight to apply a sufficient setting force to the liner-top packer.A conventional alternative to an integral packer design is a secondary tie-back packer, but this alternative requires at least two extra trips into the wellbore and picking up of a string of large drill collars to supply the significant force required.A solution was found that was capable of resolving this problem, and the innovative technology applied will be the focus of this paper. An expandable liner hanger that allows a hydraulic setting force to be applied locally to the hanger was used. The setting force for the packer was measurable and consistent. With the success experienced on the first well, the expandable liner hanger was used in subsequent jobs, and in all of them, the operator saved several days of rig time in addition to experiencing a successful completion.

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“…4,5,6 Based on the following capabilities, the expandable liner-hanger system appeared to offer the required solutions for the troublesome application:…”

Section: The Expandable Solutionmentioning

confidence: 99%

Expandable Liner Hanger Resolves Sealing Problems and Improves Integrity in Liner Completion Scenarios

Williford

Smith

2007

All Days

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“…Well construction using tubular expansion is an innovative technology for drastically saving drilling costs 1,2 . EXP-T is commonly used in the form of expandable patches for casing repair and slim hole casing designs, in order to reduce casing pipe diameters.…”

Section: Introductionmentioning

confidence: 99%

Collapse Prediction Methodology for the Solid Expandable Tubular

Agata¹,

Tsuru²,

Sawamura³

et al. 2011

All Days

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This paper summarizes an experimental and numerical study aimed at understanding the collapse resistance of expandable tubulars (EXP-T), both before and after expansion, and at constructing a prediction method for post-expanded collapse. Post-expanded collapse resistance is one of the important properties for EXP-T, and the high-collapse EXP-T is necessary for the realization of expandable tubular monobore wells. Thus, a reliable prediction technique can be useful for casing-design utilizing EXP-T. However, the current collapse formulas widely used are not applicable to post-expanded pipes.To solve this subject, firstly, full-scale expansion and collapse tests were performed to compare collapse resistance between two materials. Secondly, two prediction methods were validated for post-expanded collapse: finite element analyses (FEA) and the statistic formula used in conventional OCTG.The test results demonstrated that post-expanded collapse resistance is significantly degraded by the increase in the diameter-to-thickness ratio. There was a large difference in the reduction ratio of the collapse between the conventional and trial material, and the FEA model is capable of evaluating the precise collapse strength of post-expanded pipes by modeling the collapse governing factors. It was also clear that the distribution of residual stress after expansion is opposite to conventional OCTG, although the residual stress deteriorates the collapse resistance after expansion. Moreover, by modifying the definition of the mechanical property of the pipe, the collapse prediction formula is capable of accurately calculating the collapse pressure after expansion. This result is caused by the difference in the shape of stress-strain (S-S) curves between conventional OCTG and post-expanded pipes.We expect that this research work will contribute to improving our understanding of EXP-T collapse, and will help form the technical basis for the reliability of EXP-T casing design.

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“…EXP-T are commonly used in the form of expandable patches for casing repair and slim hole casing designs to reduce casing pipe diameters. Recently, however, monobore wells have been investigated for ultimate drilling applications using EXP-T technology and some drilling contractors have been developing practically expanding methods using an expansion cone 1,2 . For the typical procedure, pipes are expanded by forwarding the solid cone using mechanical and hydraulic power sources.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Expandability and Collapse Resistance of Expandable Tubulars

et al. 2009

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Expandable tubular technology is an effective method for saving on the costs of well drilling and completion. There are many applications for casing repair and slim hole casing design. The most essential performances of expandable tubular (EXP-T) are the expandability and collapse resistance, which are affected by not only the expanded pipe properties, but also the axial restraint caused by sticking pipe in well.This paper discusses the geometrical and material factors governing pipe expandability, the effect of axial restraint during the expansion, and the collapse resistance of the expanded pipe. Two types of pipe were evaluated using pipe expander equipped with a function of the axial restraint. FEA for pipe expansion considering the pipe geometries and the mechanical property were also carried out for solving the fracture mechanism and deriving the design diagram of EXP-T. In addition, the full-scale collapse tests were performed for evaluating the collapse resistance of the expanded pipes and verifying the prediction using the conventional formulas.These results reveal the relevant combination of the pipe geometries and the material properties for preventing the expansion failure. A potential to improve the collapse resistance of the pipe expanded under the axial restraint is drawn.

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Expandable Tubular Solutions

Cited by 40 publications

References 0 publications

Expandable Liner Hanger Resolves Sealing Problems and Improves Integrity in Liner Completion Scenarios

Expandable Liner Hanger Resolves Sealing Problems and Improves Integrity in Liner Completion Scenarios

Collapse Prediction Methodology for the Solid Expandable Tubular

Evaluating the Expandability and Collapse Resistance of Expandable Tubulars

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