Casing Drilling Activity Expands in South Texas

Fontenot, Kyle; Highnote, Joe; Warren, T.M.; Houtchens, Bruce

doi:10.2118/79862-ms

Cited by 32 publications

(24 citation statements)

References 5 publications

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“…No wear or damage was seen on the pipe body, nor was any detected by wall thickness inspections, but it was not unusual for some of the couplings in the lower portion of the casing to be worn, often on only one side. 5,14 The casing coupling wear appears to be caused by angular misalignment of joints of casing at the couplings. The misalignment results from the combined tolerances in the four machining operations involved (two pin threads and two box threads), and the fact that the casing itself is not completely straight.…”

Section: Casing Drilling Accessoriesmentioning

confidence: 99%

“…They had been engaged in a sustained, multi-rig, development program in Lobo since the mid-1990's. 4,5 Drilling efficiency had improved to the point in 2001 where additional gains were difficult to achieve, with an average 10,500 ft well taking about 19.2 days from spud to rig release. But further cost reduction was dictated by the need to develop smaller and smaller reservoirs if drilling in the area was to continue.…”

Section: Casing Drilling Case Historiesmentioning

confidence: 99%

“…The technology was introduced as a five well pilot project, which was expanded to a one-rig drilling contract, and ultimately expanded to a contract for three new purpose built Casing Drilling rigs. 5 There were 22 wells drilled with the initial rig used to introduce Casing Drilling to Lobo and subsequently more than 50 wells have been drilled with the three purpose built rigs delivered to the field in late 2002 and early 2003. These 15,000 ft rigs, built specifically for ConocoPhillips, are designed to optimize the Casing Drilling process.…”

Section: Casing Drilling Case Historiesmentioning

confidence: 99%

“…1,2,3,4,5,6 This activity includes both onshore applications where entire wells have been drilled with casing * Casing Drilling is a trademark of Tesco Corp. and offshore applications where only the first hole section or two have been drilled with casing.…”

Section: Introductionmentioning

confidence: 99%

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Casing Drilling with Retrievable Drilling Assemblies

2004

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Retrievable Casing Drilling * tools have been used to drill more than 600,000 ft of hole in over 120 wells encompassing six casing sizes ranging from 4-1/2" to 13-3/8" and reaching inclinations of 90 o . This drilling system is composed of downhole and surface components that provide the ability to use normal oil field casing as the drill string so that the well is simultaneously drilled and cased. The casing is rotated from the surface for all operations except slide drilling with a motor and bent housing assembly for oriented directional work.A retrievable drilling assembly is attached to the casing inside a proprietary profile nipple located near the casing shoe. The drilling assembly extending below the casing usually includes an underreamer and a PDC or roller cone pilot bit. Other conventional drill-string components may be included so that almost any normal drilling activity can be conducted. These assemblies are retrieved with a wireline at the casing point or at any point in the drilling process when there is a need to change drilling tools.

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Section: Casing Drilling Accessoriesmentioning

confidence: 99%

Section: Casing Drilling Case Historiesmentioning

confidence: 99%

Section: Casing Drilling Case Historiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Casing Drilling with Retrievable Drilling Assemblies

2004

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“…DCwD technology uses the casing, in place of drillpipe, to convey rotation, torque and act as a conduit for the drilling fluids. 1 The directional BHA is latched to the lowermost casing joint and extends approximately 85 ft out of the shoe. It is driven by both surface rotation and a downhole motor.…”

Section: Introductionmentioning

confidence: 99%

High Angle Directional Drilling With 9 5/8-in. Casing in Offshore Qatar

et al. 2009

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Drilling with Casing Reduces Cost and Risk

Warren¹,

Houtchens²,

Tessari³

2006

All Days

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More than 1.2 million ft of hole has been drilled in over 260 wells with retrievable casing-while-drilling tools. These wells have been drilled with seven casing sizes ranging from 4–1/2″ to 13–3/8″. The drilling system is composed of downhole and surface components that provide the ability to use normal oil field casing as the drillstring so that the well is simultaneously drilled and cased. The casing is rotated from the surface for most operations. The experience gained while drilling these wells has led to a better understanding of the advantages of the process. It's most effective applications have been to reduce the cost and risks associated with wells which routinely experience lost circulation when drilled conventionally; wells in which well control is difficult for tripping drillpipe; wells where excessive fluid loss into low pressure reservoirs impairs the production and ultimate recovery; and wells where it is difficult to get the casing shoe as deep as needed. Introduction Simultaneously drilling and casing a well by using conventional oilfield casing as the drillstring has been a dream of a few drillers since the rotary drilling process was introduced in the late 1800's. One patent1 dating back to 1890 describes a rotary drilling process for simultaneously drilling with the casing (including a sand control screen) and then retrieving the hydraulically expandable bit. Another patent issued in 1926 list the advantages (Table 1) of drilling with casing with a retrievable bit.2 Inventors kept up a steady stream of ideas aimed at fielding a practical system for drilling with casing and a retrievable bit.3–10 Considerable work was done in Russia beginning in the late 1930's to develop a system for replacing the drill bit without having to trip the drillstring. This work was stimulated by the desire to reduce the time spent tripping to replace bits that had relatively short runs.11, 12 Work done by Brown Oil Tools13 in the late 1960's was the first broad effort to develop all the surface and downhole components needed to drill with casing and retrievable bits. This "casing-drilling system" included components forrotating the casing with an electric top drive,gripping the casing without utilizing its threads,locking a wireline retrievable drilling assembly to the bottom of the casing, andusing an underreamer to enlarge the borehole. Ultimately, this work failed because of the inertia in the drilling industry, but it did stimulate the development and commercialization of the top drive. Tesco started development of a casing-while-drilling (CwD) system in 1997 that included the complete system needed to drill with casing. While others had failed to accomplish this earlier, improvements in materials (e.g. PDC cutters for underreamers), increased market applications (particularly related to problems encountered in drilling marginal fields), and the brute determination and financial commitment of Tesco management successfully produced a CwD system that has gained commercial acceptance. This system has proven to be a practical method of solving drilling problems and of reducing drilling costs.14–18 It is currently being used in both onshore applications where entire wells are drilled with casing and offshore applications where specific hole sections are drilled with casing.

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Casing Drilling Activity Expands in South Texas

Abstract: fax 01-972-952-9435. AbstractConoco has had a sustained, multi-rig, development program in the Lobo field of South Texas since the mid-1990's.

Cited by 32 publications

References 5 publications

Casing Drilling with Retrievable Drilling Assemblies

Casing Drilling with Retrievable Drilling Assemblies

High Angle Directional Drilling With 9 5/8-in. Casing in Offshore Qatar

Drilling with Casing Reduces Cost and Risk

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