New Washpipe Technology: Why Operators Should Care
Bibliographic record
Abstract
This paper will outline the application of a breakthrough technology to address Top Drive washpipe durability in high temperature and high pressure (HPHT) wells. The introduction, application, and submission of a performance comparison to support the advancement/proliferation of this technology are presented from an operating company's perspective. Problem Since the introduction of Top Drive Systems in the late 1980's, a consistent limiting factor has been the durability of the washpipe seal mechanism, particularly in HPHT + high speed drilling applications. This durability issue has greatly affected the efficiency of the circulation system's integrity, and it has also decreased overall operating efficiencies. Washpipe failures occurring during critical operations, such as during well control situations, can increase risk to personnel and equipment. Solution National Oilwell Varco has introduced a technical solution that utilizes mechanical sealing technology developed outside the oil and gas industry. This technology has proven itself in joint-effort field trials by ConocoPhillips and Ensco in the North Sea. The challenge is to promote the use of the technology worldwide to solve the habitual washpipe durability problem. Challenges to Implementation Traditionally, new technology is difficult to implement in the oilfield. The intent of this paper is to help overcome typical barriers and help rush this solution out to positively impact the drilling fleet as quickly as possible. Conclusions A reliable sealing mechanism has been identified to address the washpipe durability issues, and field trials of this new product have yielded positive results. The typical barriers to product implementation were minimized by applying previous lessons-learned, with successes in operations, cost savings, and safety.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.009 | 0.029 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.005 | 0.006 |
| Scholarly communication | 0.007 | 0.014 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.011 | 0.012 |
| Insufficient payload (model declined to judge) | 0.016 | 0.008 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".