Anaconda: Joint Development Project Leads to Digitally Controlled Composite Coiled Tubing Drilling System

Marker, Roy; Haukvik, John; Terry, J.; Paulk, Martin; Coats, E. Alan; Wilson, Tom; Estep, Jim; Farabee, Mark; Berning, Scott; Song, Haoshi

doi:10.2118/60750-ms

“…The ACCT is a lightweight fatigue and corrosion-resistant coil tubing (4) . Data is transferred to the surface from the downhole sensors at 48 kbps in full duplex, with none of the detection problems associated with mud-pulse telemetry.…”

Section: The Acctmentioning

confidence: 99%

“…The other four wires transmit power. The carbon matrix in the middle provides the burst and tensile strength of the tubing which, in turn, is covered by two pressure integrity wear layers separated by an impermeable layer (4) .…”

Section: The Acctmentioning

confidence: 99%

The Benefits of Real-Time Downhole Pressure and Tension Data With Wired Composite Tubing

Dalton

¹

,

Paulk

²

,

Stevenson

³

2003

Journal of Canadian Petroleum Technology

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Continuous composite coiled tubing with embedded electric conductors can provide uninterrupted flow of data from downhole tools. This capability makes monitoring borehole stability throughout the entire drilling process possible, even when conventional mud-pulse telemetry tools are not operating and cannot provide information in real-time. An operator faces many borehole stability problems: stuck pipe, pack-off events, lost circulation, kicks, leak-off tests, and formation integrity tests, all of which can result in periods of non-circulation. However, an operator no longer has to rely solely on surface gauges to provide downhole information to deal with these problems because downhole readings are now available. The benefits of downhole pressure and tension data throughout these problematic and routine activities provide valuable information on events during the most critical operating procedures. Consequently, corrective actions can be taken to prevent or cure borehole stability problems almost as soon as they develop. In addition, downhole data can help reduce drilling time. The borehole is under constant scrutiny. Drilling, tripping, non-circulating, and circulating operations can be optimized while avoiding other potential problems. For example:Swab and surge pressures can be monitored constantly while tripping without circulating;Ledges and tight spots can be identified before they cause severe damage;Time for leak-off tests (LOT) and formation integrity tests (FIT) can be minimized;Early indications of borehole ballooning can be identified before ballooning becomes a major borehole stability issue; and,Hole cleaning intervals can be optimized, reducing drilling time. This paper covers a series of examples where continuous, uninterrupted data transmission was used to anticipate and prevent borehole stability problems and optimize the drilling procedure. Introduction The embedding of copper electrical conductors in Advanced Composite Coil Tubing (ACCT) allows a stream of high speed, high density data to be transmitted in real-time between the downhole components and the surface system. This uninterrupted communication enables the operator to receive all of the data, all of the time, regardless of the operating activities underway. In pipe-conveyed drilling, the real-time application of the "pressure while drilling" (PWD) data has been well documented. It is a very useful tool when used in conjunction with all the other drilling parameters to measure and anticipate drilling problems(1- 3). However, the extent to which mud-pulse telemetry data can be used during all operating activities is limited. The real-time application of PWD data has been hindered because of the constraints placed on the amount of data that can be pulsed to the surface. Ironically, one of the times when PWD data is most useful occurs when it cannot be pulsed up. This could be due to low flow rates or the pumps having to be switched off to avoid damaging the borehole or getting stuck. Surface gauges then have to be relied upon for downhole measurements. With the ability to have "real-time data all the time," pump-off data that could not be seen until the end of the run can now be seen immediately.

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“…4 Data is transferred to the surface from the downhole sensors at 48 kbps in full duplex, with none of the detection problems associated with mud-pulse telemetry. Simultaneously, commands are transferred from the surface computers to the BHA, providing instantaneous control of the downhole components.…”

Section: The Acctmentioning

confidence: 99%

The Benefits of Real-Time DownHole Pressure and Tension Data With Wired Composite Tubing

Dalton¹,

Paulk²,

Stevenson³

2002

Canadian International Petroleum Conference

2

0

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Continuous composite coiled tubing with embedded electric conductors can provide uninterrupted flow of data from downhole tools. This capability makes monitoring borehole stability throughout the entire drilling process possible, even when conventional mudpulse telemetry tools are not operating and cannot provide information in real-time.An operator faces many borehole stability problems: stuck pipe, pack-off events, lost circulation, kicks, leakoff tests, and formation integrity tests, all of which can result in periods of non-circulation. However, an operator no longer has to rely solely on surface gauges to provide downhole information to deal with these problems because downhole readings are now available. The benefits of downhole pressure and tension data throughout these problematic and routine activities provide valuable information on events during these most critical operating procedures. Consequently, corrective actions can be taken to prevent and cure borehole stability problems almost as soon as they develop. In addition, the downhole data can help reduce drilling time. The borehole is under constant scrutiny. Drilling, tripping, non-circulating, and circulating operations can be optimized while avoiding other potential problems. For example: • Swab and surge pressures can be monitored constantly while tripping without circulating. • Ledges and tight spots can be identified before they cause severe damage. • Time for leak-off test (LOT) and formationintegrity tests (FIT) can be minimized. 2 • The early indications of borehole ballooning can be identified before ballooning becomes a major borehole stability issue. • Hole Cleaning intervals can be optimized reducing drilling time This paper covers a series of examples where continuous, uninterrupted data transmission can be used to anticipate and prevent borehole stability problems and optimize the drilling procedure.

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“…1 The driller concentrates on the physical drilling process, while the geosteering engineer evaluates the formation characteristics to better steer the tool for an optimum producing wellpath. The stations are fully networked and interchangeable to allow full backup.…”

Section: Control Systemmentioning

confidence: 99%

“…In less than 27 months, from the feasibility study in late 1997 to completion of an extensive testing and qualification program in early 2000, Halliburton and Statoil produced this complete fit-for-purpose, digitally controlled system that uses Advanced Composite Coiled Tubing (ACCT), a carbon-fiber composite umbilical with embedded conductors and a bottomhole assembly (BHA). 1 The result is a true leap forward in well construction technology. The key design features of the AWCS include reduced weight and space, smaller crew sizes, and the capability to drill difficult wellpaths.…”

Section: Introductionmentioning

confidence: 99%

The Hybrid Drilling System: Incorporating Composite Coiled Tubing and Hydraulic Workover Technologies into One Integrated Drilling System

Coats

¹

,

Farabee

²

2002

IADC/SPE Drilling Conference

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Historically well drilling operations have been based exclusively on steel pipe. Recently a drilling system that combines composite coiled tubing technology and hydraulic workover technology has been introduced. This paper examines the operating experience for the system and its implications for the future.By using composite pipe with embedded conductors, the system achieved uninterrupted real-time two-way communication with the downhole tools. This allowed a stepchange improvement in the knowledge of dynamic wellbore conditions and in the control over downhole systems. New procedures were developed to assimilate and use this increased functionality. These procedures include both geosteering and real-time system diagnostics from remote locations.Incorporating a hydraulic workover (HWO) jacking system as an integral part of the drilling unit also expanded the operating envelope and functionality of the entire drilling system. This revolutionary full-system development encountered numerous challenges, many of which are related to the unique properties of composite pipe in difficult hole conditions. The technological solutions to these challenges are examined in depth.

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Anaconda: Joint Development Project Leads to Digitally Controlled Composite Coiled Tubing Drilling System

Cited by 14 publications

References 6 publications

The Benefits of Real-Time Downhole Pressure and Tension Data With Wired Composite Tubing

The Benefits of Real-Time Downhole Pressure and Tension Data With Wired Composite Tubing

The Benefits of Real-Time DownHole Pressure and Tension Data With Wired Composite Tubing

The Hybrid Drilling System: Incorporating Composite Coiled Tubing and Hydraulic Workover Technologies into One Integrated Drilling System

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