ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01132.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01133.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01134.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01135.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01136.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01137.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

AbstractWith the rapid growth of PVC in the well casing and screen market, many different applications and methods of use have surfaced. One major method of fastening or joining thermoplastic well casing is the flush‐joint thread. Widespread use of flush‐joint threads on Schedule 40 and Schedule 80 pipe has caused concern about the physical strength and hydrostatic integrity of these threads. These concerns are magnified when one discovers the multitude of different manufacturers, each with his own thread design. There has, however, been a solution: Committee F17 of ASTM has passed a change in the Standard F480, which is now: ASTM F480–88A Standard Specification for Thermoplastic Well Casing and Couplings Made In Standard Dimension Ratios (SDR), Schedule 40 and Schedule 80. This change partially consists of incorporating specifications for flush‐joint threads in Schedule 40 and Schedule 80 casing, in sizes ± inch to 16 inch in Schedule 80 and 2 inch to 16 inch in Schedule 40. This long overdue standard now ensures field thread compatibility with all pipe specified with this standard. It also requires manufacturers to cut a functional and reliable thread.Extensive testing has been done to determine the physical properties of the specified thread. The three tests that help the purchaser determine the working parameters of this flush‐joint thread include:1. Tensile test of the threaded joint2. Internal hydrostatic pressure test3. External hydrostatic pressure test.Using ASTM guidelines test methods were developed for testing this thread. Results show that the new thread specification in F480 is a valid and functio

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01138.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

AbstractTraditionally, the water well contractor adds a section of blank casing to the bottom of the well screen in a production well. This practice has been carried over to ground water monitoring wells by some engineers and hydrogeologists, and is even recommended by the RCRA Technical Enforcement Guidance Document (TEGD). After examining the proclaimed advantages, it is the author's opinion that the well foot is not necessary for a monitoring well.

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01139.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

AbstractDual‐wall reverse‐circulation drilling uses flush‐threaded double‐wall drill pipe and high‐pressure air to provide continuous return of formation and water samples. Cuttings and formation waters are not contaminated with drilling additives or mixed with other borehole material. Up‐hole velocity of about 70 ft/sec provides reliable logging of water, mineral or contaminant‐bearing strata. Water samples representative of specific strata may be airlifted or bailed to the surface.In the percussion hammer system, dual‐wall drill pipe is advanced through chiefly unconsolidated material by the percussion action of an above‐ground pile hammer. The borehole is drilled and temporarily cased in one pass. Wells or monitoring devices are installed as the drill pipe is hydraulically retracted during construction. A rotary head may be adapted as an option to allow dual‐wall rotary drilling into consolidated or crystalline formations through a percussion hammer drill string temporarily left in place as a conductor.The complex geology and variety of geoenvironmental problems in southern California has provided a testing ground for dual‐wall drilling on hazardous material site investigations. Several case histories have demonstrated the capabilities and versatility of this method, including: (1) the installation of 4‐inch and 6‐inch diameter gasoline monitoring and recovery wells through gravels and cobbles at a filling station where hollow‐stem auger drilling failed; (2) the confirmation of a dry borehole initially drilled by direct rotary at a landfill; and (3) multiple installations of monitoring devices through municipal refuse at a c

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01140.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

AbstractThe Groundwater Monitoring Program at the Savannah River Plant currently consists of more than 700 wells at more than 70 sites, and growth is projected. The organization and operation of the program has been designed to support an active drilling program, the acquisition of a large amount of repetitive data, the generation of numerous reports, associated QA/QC controls, and provisions for additional growth. The design is centered around two key features—modular components and computer usage.The modular component concept is an organizational tool that gives one group responsibility for a specific portion of the program. This responsibility includes the operation of its segment and the coordination of operations with the other groups in the program.Computers, the associated software programs, and a simple set of rules (the sampling guide) enables the program to accommodate large amounts of repetitive data in a timely, uniform manner. Feedback loops are included to ensure that new data are incorporated into future program decisions (new sample schedules and well locations). The highly automated system determines new sample schedules, collates/reviews incoming data, and generates various reports. Six reports are issued on a regular basis, from quarterly to annually, to ensure that the program is adequately documented.The program has been in successful operation for more than a year and has accommodated the expected growt

ISSN:1069-3629    

DOI:10.1111/j.1745-6592.1989.tb01141.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY