Improve Primary Cementing by Continuous Monitoring of Circulatable Hole

Ravi, Kris; Beirute, R.M.; Covington, R.L.

doi:10.2118/26574-ms

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…If washouts are unavoidable, the reduced pipe standoff should be compensated by enforcing other best cementing practices, such as providing good mud properties, pumping rates, spacer design, etc. 1 For the ConocoPhillips south Texas CWD operation, helical and hardface blade centralizers have been used to provide adequate casing centralization for cementing (Fig. 1).…”

Section: Centralization For Casing While Drillingmentioning

confidence: 99%

Cementing Considerations for Casing While Drilling Operations: Case History

Strickler

Solano

2007

Proceedings of SPE/IADC Drilling Conference

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TX 75083-3836 U.S.A., fax 1.972.952.9435. AbstractCasing while drilling (CWD) is an emerging technology being introduced in different areas around the world This new configuration, where the casing is used as a drillstring, presents new challenges for primary casing cementing operations compared to the conventional cementing operations.A full understanding of the required changes of the cementing methodology from conventional drillpipe drilling operations can contribute to the success of any CWD campaign. CWD cementing differs from conventional cementing practices because it is impossible to use standard centralizers attached to the casing while drilling because of extended and faster casing rotation.When more than one bit is required to reach the next casing point, CWD requires full-bore casing access to pull and run bottomhole assemblies (BHA) through the casing. In these instances, conventional floating equipment cannot be used.Wireline logging is normally conducted in cased hole after the cementing job. The cement volumes are calculated with a cement excess factor instead of a caliper log. This paper describes the methodology developed to successfully cement surface, intermediate, and production casings in more than 125 wells in south Texas where CWD was used. These same techniques can be applied in CWD operations elsewhere.

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Section: Centralization For Casing While Drillingmentioning

confidence: 99%

Cementing Considerations for Casing While Drilling Operations: Case History

Strickler

Solano

2007

Proceedings of SPE/IADC Drilling Conference

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“…Hole conditioning software is becoming available to help determine optimal annular velocities and fluid rheologies. 3 Slurry Design. Often, plug slurries are tested immediately before the job with little attention to detail, and designs are tested only for pumping time.…”

Section: Jpt • September 1996mentioning

confidence: 99%

Advances in Cement-Plug Procedures

Heathman

1996

Journal of Petroleum Technology

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Operators set cement plugs for a variety of reasons: abandonment, sidetracking, lost-circulation control, or remedial work. However, as important as plug cementing can be to the overall success of a well program, the process often is performed without regard to wellbore conditions. The additional rig time and material costs quickly add up as mUltiple plugs are set. The industry average is approximately 2.4 attempts per kickoff.' Studies have highlighted many of the problems encountered in plug cementing. Implementation of systematic, controlled procedures has established a near 100% success rate where used for establishing kickoff plugs. Recommended Plug ProcedureRecent work has determined that cement plugs require the same degree of planning as primary cement jobs, plus special considerations for plug stability. ',2 Ajoint team of operators and a cementing service company evaluated the problems and mechanics of plug cementing. The team developed a recommended plug procedure (RPP) to alleviate problems. The procedure provides a reliable plugsetting procedure and develops a method to monitor success rates. The RPP addresses communication, temperature estimation, mud removal, slurry design, slurry volume, and plug stability. Understanding the relationships between these variables is vital to thc SIlCcess of spotting a balanced cement plug.

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“…A substantial amount of important work [1][2][3][4][5][6][7] has been conducted in attempting to maximize cementing success on the first try to avoid costly remedial cementing work. The work has included studies of (1) drilling fluid characteristics, (2) erodibility of filter cake and gelled muds, (3) monitoring of circulatable hole, (4) hole conditioning, (5) spacers and flushes, and (6) annular velocities.…”

Section: Introductionmentioning

confidence: 99%

Hole Cleaning and Cement Design for Specific Formation Types

Rueda

Heathman

Serrano

2003

SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThis paper describes a new design procedure developed to help effectively remove drilling fluid components, particularly thick layers of partially dehydrated filter cake, from the casing/wellbore annulus after the fluid has been exposed to downhole conditions, including, temperature, pressure, fluid loss, and static time. This new methodology can be conducted in any properly equipped cementing and drilling fluids laboratory.To isolate the zones of a well and allow a reservoir to be produced safely and economically, drilling fluid and drill cuttings should be removed from the annulus and replaced by a competent cement sheath that bonds and seals the casing to the wellbore. Simple laboratory tests performed with commercially available testing devices help the designer evaluate the cleaning efficiency of flushes, spacers, and surfactants under simulated downhole conditions. These tests can determine the following parameters:• Force required to mobilize the drilling fluid • Chemical effects of preflushes and/or spacers used for mud removal and filter-cake removal and their effect on filter-cake permeability These parameters, combined with a mathematical model that helps determine the fluid properties and annular velocities required to effectively remove drilling fluid, provide a realistic simulation of the displacement process.Case histories and well logs illustrate how the displacement process can be significantly improved when designers use a procedure that includes the following steps:1. Conduct laboratory tests. 2. Run a mathematical simulation model. 3. Design fluids to address issues such as cementing across unconsolidated and/or high-permeability formations.

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Improve Primary Cementing by Continuous Monitoring of Circulatable Hole

Cited by 13 publications

References 10 publications

Cementing Considerations for Casing While Drilling Operations: Case History

Cementing Considerations for Casing While Drilling Operations: Case History

Advances in Cement-Plug Procedures

Hole Cleaning and Cement Design for Specific Formation Types

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