Dave Hearn

ORCID: 0000-0002-9446-7247
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About
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Research Areas
  • Drilling and Well Engineering
  • Oil and Gas Production Techniques
  • Psychopathy, Forensic Psychiatry, Sexual Offending
  • Hydraulic Fracturing and Reservoir Analysis
  • Healthcare Decision-Making and Restraints
  • Tunneling and Rock Mechanics
  • Psychiatric care and mental health services
  • Geotechnical Engineering and Underground Structures
  • Criminal Justice and Corrections Analysis
  • Seismic Imaging and Inversion Techniques
  • Pharmaceutical industry and healthcare
  • Disaster Response and Management
  • Manufacturing Process and Optimization
  • Maritime Ports and Logistics
  • Substance Abuse Treatment and Outcomes
  • Transportation and Mobility Innovations
  • Organizational Change and Leadership
  • Emergency and Acute Care Studies
  • Urban and Freight Transport Logistics
  • Healthcare Technology and Patient Monitoring
  • Gambling Behavior and Treatments
  • Reservoir Engineering and Simulation Methods
  • Innovations in Medical Education
  • Sharing Economy and Platforms
  • Digital Mental Health Interventions

Canterbury Christ Church University
2023

Health Education England
2022

South London and Maudsley NHS Foundation Trust
2011-2016

Alaska Volcano Observatory
1996-1999

Purpose Leave is an important part of life for both patients and clinicians in secure mental health learning disability settings. Patients breaching leave conditions (i.e. absconding or failing to return) represent a small percentage episodes; however when incidents occur there can be far reaching negative outcomes potential victims, the patient service. The purpose this paper devise risk assessment specifically decision making based on literature available. Design/methodology/approach Using...

10.1108/20441281211285919 article EN Advances in Mental Health and Intellectual Disabilities 2012-11-16

In 2010, following a series of high-profile absconding incidents, electronic monitoring (EM) using Global Positioning System technology for patients on leave was trialled as part comprehensive protocol risk management and recovery. We conducted preliminary evaluation effect violation. The total number episodes violations over four-month period prior to the introduction EM compared with totals in two corresponding follow-up periods years after introduction. Total increased by almost 60%....

10.1080/14789949.2015.1122823 article EN Journal of Forensic Psychiatry and Psychology 2015-12-24

'Electronic Monitoring' (EM) uses devices to monitor individuals' whereabouts. In 2010, South London and Maudsley medium secure unit introduced EM individuals on leave. Analysis after two years revealed was associated with increased unescorted leave reduced violation; however, comparative costs were not established. This study aims compare of for patients by comparing average total cost per patient without EM. Costs compared before implementation Total each group divided number generate...

10.1080/14789949.2016.1261172 article EN Journal of Forensic Psychiatry and Psychology 2016-12-09

Dave Hearn explains how the use of a global positioning satellite device can help staff reduce absconding and protect members public from risk harm

10.7748/mhp2013.03.16.6.17.e813 article EN Mental Health Practice 2013-03-01

To identify and describe the impact areas of a newly developed leadership development programme focussed on positioning leaders to improve student experience clinical learning environment.

10.1111/jonm.13732 article EN Journal of Nursing Management 2022-06-30

Summary Coiled-tubing drilling (CTD) continues to play a dominant role in through-tubing sidetracking of wells on the North Slope Alaska. Recently several CTD candidates were targeted an overpressured reservoir. Three successfully CT sidetracked as pilot project this The ultraslimhole directional-drilling system with 2.75-in. nominal openhole diameter developed at Prudhoe Bay1 was used combination unconventional approach maintain overbalanced conditions when these wells. Hydraulic modeling...

10.2118/72058-pa article EN SPE Drilling & Completion 2001-06-01

Abstract Coiled Tubing Drilling (CTD) continues to play a dominant role in through-tubing sidetracking of wells on the North Slope Alaska. Recently several CTD candidates were targeted an over-pressured reservoir. Three successfully CT sidetracked as pilot project this The ultra-slimhole directional drilling system −2.75″ nominal openhole diameter-developed at Prudhoe Bay1 was used combination with unconventional approach maintain overbalanced conditions when these wells. Hydraulic modeling...

10.2118/54496-ms article EN SPE/ICoTA Coiled Tubing Roundtable 1999-05-25

Purpose The use of drug detection (sniffer) dogs in psychiatric settings divides opinion among clinicians and service users alike. This paper provides an overview the these within a Medium Secure Unit (MSU). approach described seeks to challenge preconceptions suggests that dog searching should be one component wider therapeutic working with patients co‐existing mental health substance misuse problems. Design/methodology/approach reflects on ten years' experience using MSUs. Findings A model...

10.1108/17570971111163028 article EN Advances in Dual Diagnosis 2011-05-23

Abstract This paper documents the development and first applications of ultra-slim diameter mud-pulse-telemetry directional drilling tools for through 3-1/2" production tubing. The highly successful Coiled Tubing Drilling (CTD) program at Prudhoe Bay has concentrated on equipment required to re-enter 4-1/2" larger tubing' sizes. Typical CTD re-entry operations have sidetracked existing wells a cost 25% 75% past conventional rotary operations. However, there are significant number Prudhoc...

10.2118/46016-ms article EN SPE/ICoTA Coiled Tubing Roundtable 1998-03-15

Abstract Reliable, low cost coiled tubing window milling technology has become the cornerstone of ARCO Alaska's sidetrack program at Prudhoe Bay. began to investigate drilling in 1989. The grew into an aggressive field application this technology, with over thirty wells drilled last 2 1/2 years. program's first was cut below production a bottom hole assembly (BHA) fall 1994. To date, 14 have been sidetracked using technique. windows are off specifically formulated cement plug without use...

10.2118/35126-ms article EN 1996-03-12

Abstract Re-entry sidetracking has become an important development tool in the oilfields of North Slope Alaska. To date, approximately 220 wells have been sidetracked through existing production tubing Alaska with coiled tubing. The easier candidates are diminishing number as this cost effective re-entry technique is more widely applied. Many recent candidate required cutting a window two concentric strings tubulars. Some 2 string windows were performed without significant problems using...

10.2118/63196-ms article EN SPE Annual Technical Conference and Exhibition 2000-10-01

Summary Coiled tubing (CT) drilling is a rapidly growing new technology that has been used for shallow wells and reentry applications. Averaged over the last 4 years, number of directionally drilled with CT doubled each year from 3 in 1991 to 50 1995 (Fig. 1). A market evolved as being major application drilling. This through-tubing The motivation driving low cost rigless when overbalanced safe Christmas tree place underbalanced (for reduced formation damage). lower mobilization coiled unit...

10.2118/30486-jpt article EN Journal of Petroleum Technology 1996-05-01

Innovative Technology in Producing Operations D.D. Hearn; Hearn ARCO Oil and Gas Co. Search for other works by this author on: This Site Google Scholar C.G. Blount; Blount Alaska Inc. C.M. Hightower; Hightower D.R. Coleman; Coleman Exxon U.S.A. B.L. Carlberg; Carlberg Conoco N.O. Wolf; Wolf C.K. Clayton; Clayton Nalco Chemical B.A. Blevins; Blevins Xytec J.M. Turner; Turner R.M. Knight; Knight J. Nethers; Nethers W.D. Eatwell; Eatwell Camco Craig; Craig Damson Corp. P. McClintock; McClintock...

10.2523/18256-ms article EN Proceedings of SPE Annual Technical Conference and Exhibition 1988-10-01

Abstract This paper analyzes representative samples of downhole and surface measurements collected during a sidetrack operation with coiled tubing drilling unit. The data are classified into operational windows such as drill ahead, running in hole pulling out hole. They correlated reports hook load, pumping pressures, flow rates, slackoff. Correlations between the used to understand force transmission set-down, pick-up operations.

10.2118/46008-ms article EN SPE/ICoTA Coiled Tubing Roundtable 1998-03-15

Coiled tubing (CT) drilling is a rapidly growing new technology that has been used for shallow wells and reentry applications. Averaged over the last 4 years, number of directionally drilled with CT doubled each year from 3 in 1991 to 50 1995 (Fig. 1). A market evolved as being major application drilling. This through-tubing The motivation driving low cost rigless' when overbalanced safe Christmas tree place underbalanced 5 (for reduced formation damage). lower mobilization coiled unit (CTU)...

10.2118/30486-ms article EN Journal of Petroleum Technology 1996-05-01

Abstract The Innovative Technology in Producing Operations Forum is designed to allow the discussion of and dissemination information about technical innovations solutions production engineering that are immediate practical use but do not warrant a full-scale paper. Each subject presented five eight minute period with seven ten minutes. A wide range subjects encompassed session. Abstracts presentations follow.

10.2118/18256-ms article EN SPE Annual Technical Conference and Exhibition 1988-10-02

Abstract A critical requirement for directional drilling with coiled tubing (CT) is a reliable downhole means to manipulate the orientation of mud motor bend. Alaskan operations have traditionally used hydraulically actuated ratcheting orienters, thus avoiding complications wireline and control lines inside tubing. With highly refined field techniques well plans, fundamental drawbacks these orienters been adeptly managed on North Slope. Despite good success over years, orienting remained...

10.2118/74836-ms article EN SPE/ICoTA Coiled Tubing Conference and Exhibition 2002-04-09
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