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Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, February 20–22, 2007
Paper Number: SPE-104478-MS
... Screw-In Requires a tool joint to be backed out without damage to the box-end threads Clearly, screwing back into a connection is the ideal re-connection method. Unfortunately, this option can only be executed if the drillpipe is backed off. Within 3 stands of TD, tight hole of 20 ton (44...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20908-MS
... Abstract It is not unusual that the existing riser hang-off structures such as receptacles and I/J-tubes on offshore facilities are all occupied and are unavailable for future riser tie-backs. In such cases, it may be necessary to design and install retrofit hangoff structures to accommodate...
Images
Images
Effect of time after <span class="search-highlight">backing</span> <span class="search-highlight">off</span>, spotting the first DBP, and after fishing...
Published: 01 June 1993
Figure 14 Effect of time after backing off, spotting the first DBP, and after fishing began, 42 incidents. Arrow: in nine cases where fishing began 48 to 72 hours after the first backoff, two pipes (22.2%) came free. More
Images
Flow target was <span class="search-highlight">backed</span> <span class="search-highlight">off</span> and hanging by two threads
Published: 03 December 2018
Figure 4b Flow target was backed off and hanging by two threads More
Images
Images
Down hole pressure drop and increase when the pumps are turned <span class="search-highlight">off</span> and <span class="search-highlight">back</span>...
Published: 12 October 2021
Figure 14 Down hole pressure drop and increase when the pumps are turned off and back on again for each connection. More
Images
Differential pressures during flow <span class="search-highlight">back</span>. (a) with no cake lift-<span class="search-highlight">off</span> and (b) ...
Published: 23 February 2000
Figure 8 Differential pressures during flow back. (a) with no cake lift-off and (b) with cake lift-off. More
Images
During <span class="search-highlight">back</span> flow, the soft and pliable filter cake can be lifted <span class="search-highlight">off</span> easily...
Published: 30 May 2007
Fig 5 During back flow, the soft and pliable filter cake can be lifted off easily, and the microgel can be produced back. More
Images
A MARU waiting for deployment <span class="search-highlight">off</span> the <span class="search-highlight">back</span> deck of the vessel provided by B...
Published: 11 September 2012
Figure 1 A MARU waiting for deployment off the back deck of the vessel provided by BJJV M/V Ijsselstroom More
Images
This time-based log shows that there are pack-<span class="search-highlight">off</span> tendencies while <span class="search-highlight">back</span>-rea...
Published: 27 March 2012
Figure 5 This time-based log shows that there are pack-off tendencies while back-reaming. The green curves and region are values estimated by the models (and their associated tolerances). The blue curves are the measured values. On the right track, the brown curve shows the calculated downhole ECD... More
Proceedings Papers

Paper presented at the Offshore Technology Conference Asia, November 2–6, 2020
Paper Number: OTC-30202-MS
... in the well. We would like to take this educational opportunity to share with the industry, especially younger generations, the most common root causes of loosening and/or backing off a connection down hole and ways to address them. Over decades we have gained experience when dealing with our customers/users...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, March 9–11, 1999
Paper Number: SPE-52824-MS
...: String shot/back off Chemical Cutter Jet Cutter Metal Severing Tool The most commonly used tool is the string shot/back off, which involves applying left hand torque to the pipe string at the neutral weight. The explosive produces and intense hammer blow and allows the joint to be unscrewed...
Proceedings Papers

Paper presented at the European Petroleum Conference, October 22–25, 1984
Paper Number: SPE-13003-MS
... Abstract : Conventional back-off equipment has been used for many years to disconnect from a stuck drill-string. The success rate in backing-off drill collars has been low, decreasing markedly with depth and deviation. This has often resulted in abandoning most of the expensive BRA components...
Proceedings Papers

Paper presented at the SPE/IADC International Drilling Conference and Exhibition, March 5–7, 2019
Paper Number: SPE-194072-MS
... to torsional fluctuations. However, newly gathered data shows that the bit can actually come to a complete stop while the motor is forced into backwards rotation. Motor twist-offs and back-offs while drilling can be the costly consequence of such behavior. Using high-frequency, at-bit, measurements, dynamic...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, November 14–16, 2016
Paper Number: IPTC-18979-MS
... &amp; the well was killed off bottom with 19.7 ppg mud. Throughout running in hole with the free point locator tool prior to back off job, the held up was observed at 12,490 ft i.e. 1,300 ft above the bit. It was then selected to clean inside drill pipe to avoid sidetracking. The well conditions presented...
Journal Articles
SPE Drill & Compl 34 (04): 414–425.
Paper Number: SPE-194072-PA
Published: 06 August 2019
... “sticking” as the BHA and drillstring are subject to torsional fluctuations. However, newly gathered data show that the bit can actually come to a complete stop while the motor is forced into the backward rotation. Motor twistoffs and backoffs while drilling can be the costly consequence of such behavior...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-1115-MS
... in the field is based only on experience and may not be at optimum, leading to higher friction with poor force transfer to the bit and reduced rate of penetration. In addition, non-optimum pipe rocking can lead to accidental connection back-offs and poor toolface control. This paper introduces the first...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2019
Paper Number: IPTC-19375-MS
... out existing dual string completion without any well control issues. An initiative to use sucker rod back off tool, first time and safe back off operation was performed successfully from very close to stuck point. The existing completion strings were pulled out and further well cleanout and workover...
Journal Articles
J Pet Technol 45 (05): 402–404.
Paper Number: SPE-20320-PA
Published: 01 May 1993
... by "backing off"becomes necessary. At this time, an economic comparison between fishing orsidetracking should be finalized. The decision to continue fishing or tosidetrack should be based on a comparison of the estimated cost and associated risk of these alternatives. Stuck Drillstring. Another type...

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