scholarly journals Design, Manufacture, and Operation of a Core Barrel for the Iceland Deep Drilling Project (IDDP)

2010 ◽  
Vol 10 ◽  
pp. 40-45 ◽  
Author(s):  
A. C. Skinner ◽  
P. Bowers ◽  
S. Þórhallsson ◽  
G. Ómar Friðleifsson ◽  
H. Guðmundsson
Keyword(s):  
Drill Pipe ◽  
Depth Interval ◽  
Data Logger ◽  
Deep Drilling ◽  
Core Tube ◽  
The Core ◽  
Core Recovery ◽  
Short Period ◽  
Design Characteristics ◽  
Drilling Project

The science program of the Iceland Deep Drilling Project (IDDP) requires as much core as possible in the transition zone to supercritical and inside the supercritical zone (>374°C), in the depth interval 2400–4500 m. The spot coring system selected has a 7 1/4" (184.15 mm) OD at 10 m length and collects a 4" (101.6 mm) diameter core using an 8 1/2" (215.9 mm) OD core bit. It incorporates design characteristics, materials, clearances and bearings compatible with operation of the core barrel at temperatures as high as 600°C. Special attention was given to the volume of flushing which could be applied to the core barrel and through the bit while running in and out of the borehole and while coring. In November 2008 a successful spot coring test using the new core barrel was performed at 2800 m depth in the production well RN-17 B at Reykjanes, Iceland, where the formation temperature is 322°C. A 9.3-m hydrothermally altered hyaloclastite breccia was cored with 100% core recovery, in spite of it being highly fractured. A core tube data logger was also designed and placed inside the inner barrel to monitor the effectiveness of cooling. The temperature could be maintained at 100°C while coring, but it reached 170°C for a very short period while tripping in. The effective cooling is attributed to the high flush design and a top drive being employed, which allows circulation while tripping in or out, except for the very short time when a new drill pipe connection is being made. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.10.05.2010" target="_blank">10.2204/iodp.sd.10.05.2010</a>

scholarly journals Deep Drilling at Base Roi Baudouin, Dronning Maud Land, Antarctica

1962 ◽  
Vol 4 (31) ◽  
pp. 101-110 ◽  
Author(s):  
E. Tongiorgi ◽  
E. Picciotto ◽  
W. de Breuck ◽  
T. Norling ◽  
J. Giot ◽  
...  
Keyword(s):  
Coarse Grained ◽  
Ice Formation ◽  
Deep Drilling ◽  
Fine Grained ◽  
The Core ◽  
Core Recovery ◽  
Morphological Studies ◽  
Antarctic Expedition ◽  
Dronning Maud Land ◽  
Air Circulation

Abstract A drilling operation and core investigations at Base Roi. Baudouin (lat. 70° 25′ 5″ S., long. 24° 18′ 38″ E.) in January 1961 are discussed. The drilling, undertaken with light equipment, attained a depth of 115.72 m. From the start serious difficulties were encountered so that it was decided to use a SIPRE auger driven by the mechanism of the drilling machine. Core recovery was close to 100 per cent. Below a depth of 43.70 m., since the drill had reached the zone of high ice density (0.85 g./cm.3), a 3 m. double core barrel was used with air circulation. A depth of 79.33 m. was reached with a core yield close to 100 per cent. From this level downwards to the final depth of 115.72 in. the core yield was only 55 per cent. Preliminary observations were made at the site. A stratigraphie profile of the first 43 m. showed an al terna-ion of coarse-grained summer layers with ice formation and fine-grained winter deposits. From the seasonal alternations of the last six years, an average annual accumulation of 38.3 cm. of water was calculated. No coloured or dust layers were observed. Between 9 and 16 m. and between 41 and 44 m. an intense formation of ice was noticed. The depth-density curve is similar to those found by the. Norwegian-British-Swedish Antarctic Expedition at Maudheim and by the Americans at Little America V. If an average annual accumulation of 38 cm. of water is assumed, the whole depth drilled corresponds to approximately 240 yr. Temperature measurements could not he carried out b;rcause of the limited time available. Detailed stratigraphie and morphological studies of the cores, which are stored at −15°C. in Brussels, are planned, as well as chemical and isotopic investigations.

Attempt of a Real-Time Drilling State Identification With Machine Learning

2020 ◽  
Author(s):  
Tomoya Inoue ◽  
Junya Ishiwata ◽  
Ryota Wada ◽  
Junichiro Tahara
Keyword(s):  
Machine Learning ◽  
Anomaly Detection ◽  
Real Time ◽  
Recovery Rate ◽  
Drill Pipe ◽  
Pipe Failure ◽  
The Core ◽  
Core Recovery ◽  
State Identification ◽  
Drilling Data

Abstract Japan Agency for Marine-Earth Science and Technology (JAMSTEC) operates the scientific drillship Chikyu for scientific research. However, Chikyu has experienced problems with respect to drill pipe failure. This may be due to the limitation of indication of anomalies such as drill pipe failure in conventional drilling data monitoring. As one of primary aims of scientific drilling is to recover core samples from sediment layers under the seabed, improving core recovery rate is very important because it can enhance the operation efficiency. Obtaining the information of lithology of drilling layer is also helpful for both scientific and operational aspects. However, there is no direct information regarding the core recovery rate and lithology. The recovery rate and lithology can be determined after retrieving a coring tool. Therefore, this study applies a machine learning technique to identify the drilling states, which includes anomaly detection of the drilling torque assuming the drill pipe failure, the prediction of core recovery rate as well as lithology. This study aims to achieve real-time drilling state identification. Accordingly, a drilling data acquisition and distribution system was developed. The drilling data distributed from the system is read by data analysis systems in several languages for real-time analysis. The drilling state identification models created in Python include the anomaly detection model and the prediction models of the core recovery and lithology. The models were installed in the real-time drilling data analyzing system, and real-time drilling state identification was attempted during the operation to confirm the health of the real-time drilling data analyzing system and to demonstrate identification with machine learning.

scholarly journals Deep Drilling at Base Roi Baudouin, Dronning Maud Land, Antarctica

1962 ◽  
Vol 4 (31) ◽  
pp. 101-110 ◽  
Author(s):  
E. Tongiorgi ◽  
E. Picciotto ◽  
W. de Breuck ◽  
T. Norling ◽  
J. Giot ◽  
...  
Keyword(s):  
Coarse Grained ◽  
Ice Formation ◽  
Deep Drilling ◽  
Fine Grained ◽  
The Core ◽  
Core Recovery ◽  
Morphological Studies ◽  
Antarctic Expedition ◽  
Dronning Maud Land ◽  
Air Circulation

AbstractA drilling operation and core investigations at Base Roi. Baudouin (lat. 70° 25′ 5″ S., long. 24° 18′ 38″ E.) in January 1961 are discussed. The drilling, undertaken with light equipment, attained a depth of 115.72 m. From the start serious difficulties were encountered so that it was decided to use a SIPRE auger driven by the mechanism of the drilling machine. Core recovery was close to 100 per cent. Below a depth of 43.70 m., since the drill had reached the zone of high ice density (0.85 g./cm.3), a 3 m. double core barrel was used with air circulation. A depth of 79.33 m. was reached with a core yield close to 100 per cent. From this level downwards to the final depth of 115.72 in. the core yield was only 55 per cent.Preliminary observations were made at the site. A stratigraphie profile of the first 43 m. showed an al terna-ion of coarse-grained summer layers with ice formation and fine-grained winter deposits. From the seasonal alternations of the last six years, an average annual accumulation of 38.3 cm. of water was calculated. No coloured or dust layers were observed. Between 9 and 16 m. and between 41 and 44 m. an intense formation of ice was noticed. The depth-density curve is similar to those found by the. Norwegian-British-Swedish Antarctic Expedition at Maudheim and by the Americans at Little America V. If an average annual accumulation of 38 cm. of water is assumed, the whole depth drilled corresponds to approximately 240 yr. Temperature measurements could not he carried out b;rcause of the limited time available.Detailed stratigraphie and morphological studies of the cores, which are stored at −15°C. in Brussels, are planned, as well as chemical and isotopic investigations.

The ICDP-USGS Deep Drilling Project in the Chesapeake Bay impact structure: Results from the Eyreville Core Holes

2009 ◽  
Author(s):  
Gregory S. Gohn ◽  
Christian Koeberl ◽  
Kenneth G. Miller ◽  
Wolf Uwe Reimold
Keyword(s):  
Chesapeake Bay ◽  
Impact Structure ◽  
Deep Drilling ◽  
Drilling Project

China, the UN, and Human Protection

2020 ◽  
Author(s):  
Rosemary Foot
Keyword(s):  
United Nations ◽  
Public Goods ◽  
World Order ◽  
Active Engagement ◽  
Fair Share ◽  
Global Order ◽  
The Core ◽  
Short Period ◽  
The Future ◽  
The United Nations

Over a relatively short period of time, Beijing moved from passive involvement with the UN to active engagement. How are we to make sense of the People’s Republic of China’s (PRC) embrace of the UN, and what does its engagement mean in larger terms? Is it a ‘supporter’ that takes its fair share of responsibilities, or a ‘spoiler’ that seeks to transform the UN’s contribution to world order? Certainly, it is difficult to label it a ‘shirker’ in the last decade or more, given Beijing’s apparent appreciation of the UN, its provision of public goods to the organization, and its stated desire to offer ‘Chinese wisdom and a Chinese approach to solving the problems facing mankind’. This study traces questions such as these, interrogating the value of such categorization through direct focus on Beijing’s involvement in one of the most contentious areas of UN activity—human protection—contentious because the norm of human protection tips the balance away from the UN’s Westphalian state-based profile, towards the provision of greater protection for the security of individuals and their individual liberties. The argument that follows shows that, as an ever-more crucial actor within the United Nations, Beijing’s rhetoric and some of its practices are playing an increasingly important role in determining how this norm is articulated and interpreted. In some cases, the PRC is also influencing how these ideas of human protection are implemented. At stake in the questions this book tackles is both how we understand the PRC as a participant in shaping global order, and the future of some of the core norms that constitute global order.

Development of a Commercial Wireline Retrievable Coring System

1998 ◽  
Vol 1 (06) ◽  
pp. 489-495 ◽  
Author(s):  
Tommy Warren ◽  
Jim Powers ◽  
David Bode ◽  
Eric Carre ◽  
Lee Smith
Keyword(s):  
Economic Evaluation ◽  
Coalbed Methane ◽  
Technical Conference ◽  
The Core ◽  
Core Recovery ◽  
Drilling Equipment ◽  
Original Manuscript ◽  
The Impact ◽  
Conventional Drilling ◽  
Target Depth

This paper (SPE 52993) was revised for publication from paper SPE 36536, first presented at the 1996 SPE Annual Technical Conference and Exhibition, Denver, 6-9 October. Original manuscript received for review 11 October 1996. Revised manuscript received 22 September 1998. Paper peer approved 23 September 1998. Summary A Wireline retrievable coring system for use with conventional drilling equipment is described. The coring system was developed and tested for application in evaluating coalbed methane prospects where a large quantity of core is required, and it is essential that the core is processed soon after it is cut. A drill plug allows for alternation between coring and drilling without tripping the drillstring. The system is particularly advantageous for coring long intervals, multiple zones relatively close together, or when the exact target depth is unknown. The system has been used to core more than 4940 m (15,057 ft) in Poland, Germany, and France, with a combined core recovery of 94%. In addition, the impact of varying rig costs on total savings is factored into the overall economic evaluation of the system. P. 489

A Comparison of Fracture Mechanics and S–N Curve Approaches in Designing Drill Pipe

1992 ◽  
Vol 114 (3) ◽  
pp. 205-211 ◽  
Author(s):  
A. Ertas ◽  
G. Mustafa ◽  
O. Cuvalci
Keyword(s):  
Fracture Mechanics ◽  
Fatigue Damage ◽  
Drill Pipe ◽  
Ball Joint ◽  
Marine Riser ◽  
Deep Drilling ◽  
Miner’S Rule ◽  
Miner's Rule ◽  
Total Damage ◽  
Dynamic Fatigue

It is well known that the upper ball joint in a marine riser, in deep drilling, can cause fatigue damage in the drill pipe passing through it. A study of fracture mechanics and S–N curve approaches has been undertaken to determine the dynamic fatigue damage in the drill pipe. Miner’s rule is utilized in both methods to determine the total damage. The results of both methods are compared.

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