THE DRILLING OF PALM VALLEY –2 WELL, AMADEUS BASIN, NORTHERN TERRITORY, USING AIR AS THE CIRCULATING MEDIUM

1974 ◽  
Vol 14 (1) ◽  
pp. 176
Author(s):  
K. Dumbrell
Keyword(s):  
Northern Territory ◽  
Gas Well ◽  
Drilling Method ◽  
The Wire ◽  
Production Tubing

Magellan Petroleum (N.T.) Pty Ltd's Palm Valley -2 was spudded in on 21st December 1969 and reached total depth of 6559 feet on 2nd February 1970. The well was completed as a gas well after flowing at the rate of 69.7 MMCF per day during testing.Hole and casing sizes were: 26 in. (20 in.) 31 ft; 17½ in. (13⅜ in.) 431 ft; 12¼ in. (9⅝ in.) 4225 ft; 8½ in. (7 in.) 6057 ft. The rig used was a National 100 and in addition to 6 in. O.D. and 8 in. O.D. drill collars 3 x 11 in O.D. and 6 x 9¼ in. O.D. were run for drilling down to 4225 feet.Compressed air was used as the circulating medium. The air equipment major components comprised: -2 Ingersoll Rand 1500 cfm primary compressors1 Ingersoll Rand 1500 psi booster compressor1 12 in.−3000 psi Shaffer rotating BOP.15 Rock bits were used in the drilling of Palm Valley −2. Substantial water was encountered while drilling through the Mereeinie Sandstone which is a major aquifer of the region.The 7 in. casing was set at 6057 ft and drilling below this point to total depth (6559 ft) was carried out with 2⅞ in. production tubing, 4¾ in. drill collars in conjunction with OTIS N nipple, XO sliding-door sleeve and X landing nipple. This string was used as a combination drill out/production assembly and was left in the hole as a completion string after removing the sliding sleeve with the wire line. A Cameron LDO 2⅞ in. control head was installed prior to drilling out the 7 in. shoe.The use of air as a circulating medium on Palm Valley −2 clearly demonstrated the economic and operational advantages of this drilling method. There are undoubtedly other favourable geological areas in Australia where this drilling and completion procedure could be adopted to great advantage.

Case History: Hydraulic Workover Unit Utilized to Recover Highly Corroded 30-Year Old Completion from a Live Gas Well in the United Arab Emirates

2021 ◽  
Author(s):  
Aurelio Marcano Avila ◽  
Abimbola Raji ◽  
Renny Ottolina ◽  
Jose Jimenez
Keyword(s):  
United Arab Emirates ◽  
Controlled Environment ◽  
Successful Operation ◽  
Time Saving ◽  
Gas Well ◽  
Overall Design ◽  
Job Preparation ◽  
Blowout Preventer ◽  
Potential Pressure ◽  
Production Tubing

Abstract In the UAE, an Operator needed to perform a completion change out in a gas well, where the existing completion has been installed for over 30 years. Logging operations had revealed several leaks point in the production tubing due to corrosion. To rectify the situation, a Hydraulic Workover (HWO) Unit was proposed integrating a punch ram in the Blowout Preventer (BOP) Configuration to manage the bleed off of potential pressure trapped between the isolated sections of the completion at surface. This document describes how the highly corroded completion tubing with eleven retrievable plugs set in a live gas well was recovered. The HWO Unit was modified so that one of the cavities in the BOP stack was dressed with customized punch rams for five inch pipe, with the objective of allowing control of any potential leaks due to plug failure. The pressure relief operation could then be completed by means of punching the tubing in the controlled environment that a Stripping BOP Stack provides. This paper compiles the details of the BOP configuration and operating procedures to recover the completion by stripping out of the well and operating the punch rams with the snubbing unit. This includes the pre-job preparation required for a successful operation and the overall design with where to locate the collars and plugs for an accurate punch, and how to confirm that the plugs are holding the pressure to continue retrieving the next completion section. In the end, a safe operation was completed with zero incidents or down time allowing the intervention to continue to the next stage of recompleting the well and putting it back to production. The customer was able to get the well back to production with an alternative solution to what was initially considered, representing a significant cost and time saving.

The method for study of vertical gas-liquid flow with foaming agent

2021 ◽  
pp. 76-89
Author(s):  
V. A. Ogai ◽  
N. G. Musakaev ◽  
A. Yu. Yushkov ◽  
V. O. Dovbysh ◽  
M. A. Vasilev
Keyword(s):  
Liquid Flow ◽  
Atmospheric Pressure ◽  
Gas Production ◽  
Gas Well ◽  
Foaming Agent ◽  
Foaming Agents ◽  
Water Cut ◽  
Gas Liquid Flow ◽  
Liquid Flows ◽  
Production Tubing

The issue of operation water-cut and "self-kills" wells is one of major aspects in gas production. One of the methods of solving this problem is the introduction of foaming agent into the well. The effectiveness of these technologies requires a theoretical and experimental study of gas-liquid flow with surfactants. We have analyzed existing works and have found out that experimental research in this area was carried out at atmospheric pressure. At the same time, the pressure in the well varies with the length of the wellbore and can affect the properties of foaming agent. The article presents a description of a facility for the study of gas-liquid flows with foaming agents at different pressure values. A method of conducting experiments on the facility, simulating a section of the production tubing of a vertical gas well, has been developed. The relations allowing calculating the volume contents of the phases in the gas-liquid flow with surfactants are proposed.

Microstructural Development in Nb-Ti Multifilamentary Superconductors During Processing

1985 ◽  
Vol 43 ◽  
pp. 190-191
Author(s):  
A. W. West
Keyword(s):  
Heat Treatment ◽  
Critical Current Density ◽  
Copper Matrix ◽  
Wire Drawing ◽  
Heat Treatments ◽  
Microstructural Development ◽  
Final Size ◽  
Density Values ◽  
The Wire ◽  
Multifilamentary Superconductors

The influence of the filament microstructure on the critical current density values, Jc, of Nb-Ti multifilamentary superconducting composites has been well documented. However the development of these microstructures during composite processing is still under investigation.During manufacture, the multifilamentary composite is given several heat treatments interspersed in the wire-drawing schedule. Typically, these heat treatments are for 5 to 80 hours at temperatures between 523 and 573K. A short heat treatment of approximately 3 hours at 573K is usually given to the wire at final size. Originally this heat treatment was given to soften the copper matrix, but recent work has shown that it can markedly change both the Jc value and microstructure of the composite.

Use of the AO Wire Passer to Aid Placement of Obstetrical Saw Wire for Osteotomy

1994 ◽  
Vol 07 (04) ◽  
pp. 180-182
Author(s):  
N. Gofton ◽  
Joanne Cockshutt
Keyword(s):  
Soft Tissue ◽  
Close Contact ◽  
Soft Tissue Trauma ◽  
Wire Saw ◽  
Tissue Dissection ◽  
The Wire ◽  
Tissue Trauma

The AO wire passer can be used as an effective guide for passage of obstetrical saw wire for osteotomy. Use of the wire saw and passer reduces soft tissue trauma by minimizing tissue dissection, and promoting positioning of the saw in close contact with the bone.

Economic benefit of shale gas exploitation based on back propagation neural network

2020 ◽  
Vol 39 (6) ◽  
pp. 8823-8830
Author(s):  
Jiafeng Li ◽  
Hui Hu ◽  
Xiang Li ◽  
Qian Jin ◽  
Tianhao Huang
Keyword(s):  
Neural Network ◽  
Shale Gas ◽  
Bp Neural Network ◽  
Large Scale ◽  
Linear Prediction ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Economic Benefits ◽  
Gas Well ◽  
Well Production

Under the influence of COVID-19, the economic benefits of shale gas development are greatly affected. With the large-scale development and utilization of shale gas in China, it is increasingly important to assess the economic impact of shale gas development. Therefore, this paper proposes a method for predicting the production of shale gas reservoirs, and uses back propagation (BP) neural network to nonlinearly fit reservoir reconstruction data to obtain shale gas well production forecasting models. Experiments show that compared with the traditional BP neural network, the proposed method can effectively improve the accuracy and stability of the prediction. There is a nonlinear correlation between reservoir reconstruction data and gas well production, which does not apply to traditional linear prediction methods

Changing patterns of migration to Australia's Northern Territory: Evidence of new forms of escalator migration to frontier regions?

2013 ◽  
Vol 10 (1) ◽  
pp. 101-114 ◽  
Author(s):  
Catherine Martel ◽  
Andrew Taylor ◽  
Dean Carson
Keyword(s):  
Young People ◽  
Life Events ◽  
Career Advancement ◽  
Work And Family ◽  
Northern Territory ◽  
Population Ageing ◽  
Men And Women ◽  
Working Lives ◽  
Changing Patterns ◽  
New Perspective

Building on Fielding’s idea of escalator regions as places where young people migrate (often temporarily) to get rapid career advancement, this paper proposes a new perspective on 'escalator migration' as it applies to frontier or remote regions in particular. Life events, their timing and iterations have changed in the thirty years since Fielding first coined the term ‘escalator region’, with delayed adulthood, multiple career working lives, population ageing and different dynamics between men and women in the work and family sphere. The object of this paper is to examine recent migration trends to Australia's Northern Territory for evidence of new or emerging 'escalator migrants'.

Working up to the wire…

2019 ◽  
Vol 13 (2) ◽  
pp. 198-206
Author(s):  
Philippa Smethurst
Keyword(s):  
Psychotherapeutic Processes ◽  
Internal Structures ◽  
The Wire ◽  
Power And Energy ◽  
Time Boundary ◽  
The Way

This is a reflection on the power of endings and time boundaries, exploring the way that time can act as a catalyst in psychotherapeutic processes. The article describes the ending processes with five clients. These occurred simultaneously due to the author’s relocation. Some responses illuminate hitherto hidden and intractable internal structures, and in others the intensity of the limit acts an impetus for the client to grasp something new. Drawing on Power’s comprehensive book: Forced Endings in Psychotherapy and Psychoanalysis (2016), the author reflects on the power and energy springing from the setting of the time boundary and the different dynamics created in client and therapist. There is acknowledgement of the pressure that this can create in the therapist and also there are reflections about what ultimately may be achieved.

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