2 1/8-in. Intelligent Coiled Tubing System Improves Operational Efficiency

Livescu, Silviu; Blanco, Diego; Vacik, L.

doi:10.2523/iptc-18294-ms

Cited by 11 publications

References 15 publications

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A review of mud pulse telemetry signal impairments modeling and suppression methods

Mwachaka

2018

J Petrol Explor Prod Technol

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Exploration and drilling operations are the most costly and risky activities that require logging while drilling effective tool operation and high speed real-time data transmission. Among other logging technologies, mud pulse telemetry has been widely adopted into real-time drilling and logging data measurements for deep formation evaluation decision-making. However, the increased downhole information quantity and quality requirements have elevated demands for greater bandwidth and higher data rate transmission. Maximum possible mud pulse telemetry data rates are obstructed by unpredictable signal impairments. Researchers have implemented numerous downhole signal modulation techniques, data compression algorithms and surface receiver noise cancellation techniques to lower bit errors and increase signal-to-noise ratio. This study reviews mud pulse telemetry system signal transmission challenges and current countermeasure trends. Rigorous technical literature reviews from exploration and drilling oilfield service industry have been at the receiving end debated. Mud channel signal characteristics, signal attenuation factors, signal detection and decoding techniques are critical to successful mud pulse operations. To minimize exploration, drilling and economic risks, this study explores mud pulse data transmission challenges, strategies and possible technical solutions to the next generation engineers and scholars in the field.

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A review of mud pulse telemetry signal impairments modeling and suppression methods

Mwachaka

2018

J Petrol Explor Prod Technol

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Coiled Tubing Telemetry System Improvements with Real-Time Tension, Compression, and Torque Data Monitoring

Blanco

Rahimov

Livescu

et al. 2016

Day 1 Mon, November 07, 2016

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Real-time depth, pressure, and temperature data monitoring is currently available for well interventions with coiled tubing (CT). A recently-developed extension for real-time forces (i.e., tension and compression) and torque data monitoring has been added to a robust CT telemetry (CTT) system, allowing further optimizations in operations such as milling, cleanouts, fishing, and extended-reach applications. The real-time CTT system consists of a non-intrusive electrical conductor wire inside the carrying CT, surface hardware and software, and three versions of bottom hole assemblies (BHAs) in different sizes: 2 ⅛-, 2 ⅞-, and 3 ½-in. Each BHA incorporates a conductor release assembly, a casing collar locator (CCL), pressure, and temperature sensors, and a BHA release function. In addition, the tension, compression and torque (TCT) assembly has been developed for the 2 ⅞-in. BHA. Switching between applications is as simple as changing out the BHA, which reduces the need to rig-up and rig-down and leads to operational time and cost savings. The main advantage of this system is that it eliminates the downhole uncertainties such that the CT field crew can react to changing conditions, making decisions based on dynamic downhole events and eliminating missed or wasted runs. Several CTT case studies have been recently presented (SPE-174850-MS and IPTC-18294-MS). The recently developed TCT assembly development and initial laboratory testing results have been also presented (SPE-179101-MS). In this paper the TCT assembly temperature calibration results and field testing are presented showing that combining the TCT data with depth, pressure, and temperature data in real-time increases the job efficiency and control. The paper describes the TCT assembly and its temperature calibration and discusses the TCT data acquired during the first field trial. The CTT system performance and benefits confirmed during the field trial are presented. These findings outline the predictability of successful operations resulting from using the CTT system and the cost and time savings for operators.

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3 ½in. Coiled Tubing Telemetry System Saves Time and Improves Operational Efficiency During a Multi-Well Campaign in Norway

Blanco

Sach

Livescu

2017

Day 1 Tue, March 21, 2017

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A newly-developed 3 ½-in. coiled tubing telemetry (CTT) system has been used for the real-time operational optimization of such coiled tubing (CT) applications as milling, cleanout, logging, and perforation, in an offshore multi-well campaign in Norway. The CTT system consists of surface hardware and software, a dual-purpose wire inside the carrying CT, and the multi-function bottom hole assembly (BHA). The wire transmits electrical power from surface to the downhole sensors located in the BHA and the downhole data from these sensors to surface. The BHA, designed in one of three sizes (i.e., 2 ⅛-, 2 ⅞-, and 3 ½-in.), contains a casing collar locator (CCL) and two pressure and temperature transducers that are capable to measure downhole data inside and outside the BHA. One of the main advantages of the CTT system is its versatility. For instance, switching between applications is as simple as only changing a certain part of the BHA. This reduces the need to rig-up and rig-down and leads to operational time and cost savings to operators. Another main advantage stems from its real-time downhole data certainty, as the CT field crew can immediately make decisions based on dynamic downhole events. A few papers have been published recently regarding a similar 2 ⅛ and 2 ⅞-in. CTT systems (SPE-174850, IPTC-18294, SPE-179101, and SPE-183026). In this paper, several case studies are presented for the 3 ½-in. CTT system for the first time. For instance, in the first well, the CTT system helped remove approximately 26,500 lb of scale through a complex wiper trip schedule, effectively preparing the well for re-completion by the main rig. In the second well, the CTT system helped pull all shallow and deep plugs and perforate three intervals in one run. In the third well, the CTT system helped clean out the well, set a plug, and re-perforate it. In addition to successfully performing all these operations, several other benefits resulted due to the real-time downhole data monitoring provided by the CTT system. For instance, the fluid friction reducer (used for reducing the fluid frictional pressure drop) was effectively used at volumes of 70-75% lower than those recommended when the CTT system is not used. Also, all these operations were performed without the need to mobilize most of the wireline and tractor equipment and crew, saving an estimated time per well of six days of wireline logistics and work. The paper briefly describes the 3 ½-in. CTT system and discusses the data acquired during these field operations. The system performance and operational benefits confirmed are presented. These findings outline the versatility of the 3 ½-in. CTT system, the predictability of successful operations resulting from using this system, and the cost and time savings to operators.

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2 1/8-in. Intelligent Coiled Tubing System Improves Operational Efficiency

Cited by 11 publications

References 15 publications

A review of mud pulse telemetry signal impairments modeling and suppression methods

A review of mud pulse telemetry signal impairments modeling and suppression methods

Coiled Tubing Telemetry System Improvements with Real-Time Tension, Compression, and Torque Data Monitoring

3 ½in. Coiled Tubing Telemetry System Saves Time and Improves Operational Efficiency During a Multi-Well Campaign in Norway

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