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.

Effects of Perforated Flow Tube on the Flow Field of a Blowout Well

SPE Journal ◽  
2016 ◽  
Vol 21 (04) ◽  
pp. 1470-1476 ◽  
Author(s):  
Ebrahim Hajidavalloo ◽  
Saeed Alidadi Dehkohneh
Keyword(s):  
Flow Field ◽  
Flow Tube ◽  
Gas Well ◽  
Safety Measures ◽  
Team Members ◽  
Well Control ◽  
Blowout Preventer ◽  
New Type ◽  
Oil Gas ◽  
Simple Flow

Summary When a blowout oil/gas well catches fire, usually a flow tube is used to detach the fire from the wellhead and provide appropriate conditions for operating team members to approach the well and install the blowout-preventer (BOP) cap. Using the flow tube above the wellhead creates powerful suction around the tube that may jeopardize the safety of crew members. To reduce the power of suction around the well, a new perforated flow tube instead of simple flow tube was introduced. To understand the effect of this new type of flow tube, modeling and simulation of the flow field around the blowout well were performed for both simple and perforated types of flow tube with Fluent 6.3.26 (2003) and Gambit 2.3.16 (2003) softwares. Different parameters around the well mouth were compared in both designs. The results showed that using the perforated flow tube decreases the vacuum around the well by 33% compared with the simple flow tubes. Thus, application of the perforated flow tube can be recommended in well-control operations for safety measures.

A Study on E-Commerce Aspects Impacting Consumer’s Online Shopping Behavior in United Arab Emirates

2021 ◽  
Vol 18 (4) ◽  
pp. 1331-1335
Author(s):  
Anil Roy Dubey ◽  
B. Balaji
Keyword(s):  
United Arab Emirates ◽  
Online Shopping ◽  
Shopping Behavior ◽  
Primary Data ◽  
Time Saving ◽  
Digital World ◽  
Shopping Experience ◽  
Online Shopping Behavior ◽  
Online Shops ◽  
Rapid Shift

In the digital world, it’s somewhat difficult to manage the expectations of the present customers especially E-Commerce Shoppers who are often challenging and pushed to keep up with what is anticipated to them. Numerous E-shoppers are under pressure to locate and approach to convey an offline in-store ride to the online store ride of higher level interaction with their customers. Experts have cited that all kinds of powers are clearly in the fingers of customers and that their never ever change their behaviors, this leads to force them to approach various online shops portals to adapt. Online shopping comes to be greatly empowered, the E-shoppers expectations from retailers to vendors and are developing a rapid shift in their behavior with an emphasis on pace and convenience. Shopper’s interest spans have become shorter, with 50 percent of shoppers leaping from one retailer website to another, earlier they making an enduring purchase. In addition, greater than eighty percent of shoppers are taking their shopping experience in both online as well as offline. A retailer’s internet site is one of the key places where customers go to search about their dream product’s records and pricing. The demand for the quick shipping of products purchased and handy services, such as click on online and collect in store, as properly as seamless returns have led to groups developing easy, no-fuss fee options. Research indicates that primary shops will continue to offer higher approaches to gather products purchased online from their stores, as a way of appealing to customers and supplying larger convenience. Based on these prevailing conditions a study was performed on E-Commerce components impacting consumer’s online purchasing conducted on the United Arab Emirates (UAE). Major portions of primary data collection were done via the questionnaires method and by means of emails in two predominant cities of UAE (Sharjah, Abu Dhabi). Cost, time saving (shipping), maintaining customers private details in a secured manner and comfort while do shopping were recognized as vital elements and this leads to assured buying conduct of online shopping. The www is to remodel in the region of populace where communal networked group impact and leads to online shopping.

Jumping on the Digitalization Bandwagon for BOP Pressure Testing

2021 ◽  
Author(s):  
Looi Lai Kheng ◽  
Martin Provan ◽  
Malik Faisal Abdullah ◽  
Eric Hoak ◽  
Gabe Hoke
Keyword(s):  
Operating Cost ◽  
Testing System ◽  
Process Safety ◽  
Offshore Drilling ◽  
Time Saving ◽  
Pressure Testing ◽  
Digital Pressure ◽  
Pressure Tests ◽  
Blowout Preventer ◽  
Drilling Rigs

Abstract Blowout Preventer (BOP) is mainly used to control well pressure by quick well shut in the event of overflow and well kick to prevent blowout on the rigs during drilling, completion, workover, and plug and abandonment phases of well operations. Regulators, Operators and Drilling contractors have put in place the requirement to test BOP systems as a method of inspection and assurance in this process safety critical steps. During well operations regular BOP pressure testing will need to be conducted to ensure its integrity and functionality as per testing requirement. In most cases BOP pressure testing is conducted online using rig time although it can also be conducted offline in some circumstances. BOP Pressure testing is considered flat time during well operations and the operators’ goal is to minimize flat times for rig time saving thus operating cost reduction. Flat time reduction can be achieved by reducing BOP pressure testing period and improving the efficiency in the entire testing process. As such a digital pressure testing system was deployed to multiple offshore drilling rigs in Malaysia beginning in September 2019 as innovative technological solutions. This paper represents the digital pressure testing system deployment study on both subsea and surface BOP drilling rigs for direct comparison with the process in use of the analog circular charter recorders (CCR) for BOP Pressure Testing. The study has shown an average 22% reduction in test times, improved safety, improved efficiency in recognizing failed tests faster, improved data reliability and repeatability of BOP pressure tests.

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.

Analysis of Hydrogen Sulfide Impact From Sour Gas Well Blowout in Offshore Platform

2010 ◽  
Author(s):  
Yuan Zhu ◽  
Guo-ming Chen ◽  
Hai-fa Deng
Keyword(s):  
Hydrogen Sulfide ◽  
Good Practice ◽  
Offshore Platform ◽  
Potential Hazard ◽  
Gas Well ◽  
Gas Leakage ◽  
Hazard Zone ◽  
Spatial Environment ◽  
Blowout Preventer ◽  
Sour Gas

Several sour gas leakage accidents have occurred in the offshore platform during the past decades, such as the Kab 121 platform in 2007, which caused serious consequences mainly resulting from the lethal toxicity of hydrogen sulfide (H2S). Under the threat of H2S, it is a challenge to exploit resource in the sour gas filed. Especially during the drilling operation, an abrupt blowout or kick could bring huge amount of H2S, envelop the platform and disperse in the cabins. The present paper is aimed at introducing our analysis of H2S dispersion both in the outer deck and inner mud treatment cabin so as to fully assess the potential poisoning during well blowout. The method we chosen was computational fluid dynamics according to the spatial environment characteristics of the offshore platform. First, we drew a comparison between accident consequences deriving from the wellhead configurations of an opened bell nipple and a sealed rotary blowout preventer (BOP) in the outer deck under various wind directions and speeds. The instantaneous concentrations and hazard zone distributions show that the second configuration is much better from the view of accident control. And the accident severity is much lower when the wind blows from the larboard, not from the prow for both configurations. As a result, the potential hazard zone would not envelop the entire platform with suitable platform position and arrangements of the mud return ditch, accommodation, helicopter deck et al. Then, the simulations of H2S dispersion in the mud treatment cabin were conducted in case of the closed outlet doors, opened outlet doors and sealed cabin with air ventilator working. An immediately dangerous to life level may come up in a short break with the door closed. In such a dangerous situation, H2S can only be made to disperse to other areas through the opened door or effectively ventilated away by means of a ventilator. It is a good practice to isolate the cabins with the potential H2S leakage and install ventilator. And a simple model was proposed to calculate the working time for the ventilator.

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.

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