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Dead line

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Clamp on <span class="search-highlight">dead</span> <span class="search-highlight">line</span> sensor. The drill <span class="search-highlight">line</span> is deflected at the crank; <span class="search-highlight">line</span> t...
Published: 02 February 2010
Fig. 2 Clamp on dead line sensor. The drill line is deflected at the crank; line tension is proportional to side force. More
Images
Images
At start, only the hook-load from the <span class="search-highlight">dead</span>-<span class="search-highlight">line</span> anchor and a few other sign...
Published: 04 March 2019
Figure 1 At start, only the hook-load from the dead-line anchor and a few other signals are exposed on the DDHub. The exposed signals are marked with a green background. More
Images
Schematic showing the position of the <span class="search-highlight">dead</span>-<span class="search-highlight">line</span> pulley in a draw-work hoist...
Published: 17 March 2015
Figure 22 Schematic showing the position of the dead-line pulley in a draw-work hoisting system More
Images
Transient rotation of the <span class="search-highlight">dead</span>-<span class="search-highlight">line</span> sheave after the static friction has be...
Published: 17 March 2015
Figure 23 Transient rotation of the dead-line sheave after the static friction has been overcome for different position of the travelling equipment. More
Images
Automatic <span class="search-highlight">dead</span> band calculation and operation. Black <span class="search-highlight">line</span> is the actual gas...
Published: 10 November 2014
Figure 5 Automatic dead band calculation and operation. Black line is the actual gas rate, blue line is the gas rate with a position step up at the choke and red line is the gas rate at a step down. More
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference and Exhibition, March 17–19, 2015
Paper Number: SPE-173035-MS
...Figure 22 Schematic showing the position of the dead-line pulley in a draw-work hoisting system ...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1335-MS
... and the block. In another, the device is attached to either the fast line or dead line, alternately paying out or taking up line. The third approach moves the crown block. However, because simplified analytical models of such systems indicated difficulties would be encountered; or because of other reasons, most...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, March 15–18, 1987
Paper Number: SPE-16056-MS
.... The hook load is not measured directly but is calculated from the tension of the dead-line. This tension is obtained from the hydraulic pressure of the dead-line anchor sensator or more directly with a strain gauge instrumented pin. P. 73^ displacement bit position evolution detection...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference and Exhibition, March 6–8, 2018
Paper Number: SPE-189601-MS
... process. Still, it is quite rare and very difficult to measure it directly, and we are often left with estimating it indirectly through measurements of the tension at the top of the string, or even at the dead line anchor. This indirect WOB measurement, commonly called surface WOB, is most often...
Journal Articles
J Pet Technol 57 (02): 50.
Paper Number: SPE-0205-0050-JPT
Published: 01 February 2005
... regret that if drilling models improve, there is too little evolution and willingness to acquire drilling-parameter data, the weight on hook is deducted from the tension of the dead line for a difficult assessment of the systematic error caused by line reeving, rendering friction analysis difficult...
Proceedings Papers

Paper presented at the SPE Western Regional Meeting, April 23–27, 2017
Paper Number: SPE-185643-MS
... of a top drive system was conducted. Fig. 2 (c) shows a schematic diagram of a top drive system like in Fig. 2 (b), and the forces analysis on the top drive system in the vertical direction. The forces include: the net dead line hookload HL_NET , namely, HL_DL*η , the TTS hookload HL_TTS , the weight...
Images
A block diagram of a drawwork-based hoisting system. Friction between the d...
Published: 29 April 2014
Fig. 8 A block diagram of a drawwork-based hoisting system. Friction between the drill line and the sheaves is disturbing the tension reading made at the dead line (illustration inspired from Lesso et al. 2011 ). More
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 19–22, 2010
Paper Number: SPE-134438-MS
... block with pulleys, install electric cable winch as drawworks, build and install traveling block, anchor the dead line and digital scale to derrick leg and add weights to simulate drillstring. The small scale hoisting system is displayed in Figure 1 . This simple setup consists of a drawworks, fast...
Journal Articles
SPE Drill & Compl 8 (04): 259–264.
Paper Number: SPE-23859-PA
Published: 01 December 1993
...Figure 5 Dead-line tension vs. block movements. ...
Images
A block diagram of a draw-work based hoisting system: friction between the ...
Published: 05 March 2013
Fig. 2 A block diagram of a draw-work based hoisting system: friction between the drill-line and the sheaves is disturbing the tension reading made at the dead-line (illustration inspired from Lesso et al . 2011 ). More
Images
Images
Images
Apparent variation of hook load between reaming up and reaming down when me...
Published: 17 March 2015
Figure 1 Apparent variation of hook load between reaming up and reaming down when measured from the dead-line tension in a draw-works hoisting system. More
Images
SOW, FRW and PUW data gathered through friction tests performed each time a...
Published: 17 March 2015
Figure 3 SOW, FRW and PUW data gathered through friction tests performed each time a stand is drilled. Hook loads measured with a sensor placed at the top of the drop-drive are compared with measurements made at the dead-line. More

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