BACKGROUND OF THE INVENTION
1. Field of the Invention
Embodiments of the present invention generally relate to the operation of instrumentation within a wellbore, and more particularly, to a system and a method for conveying and operating tools into a wellbore.
2. Description of the Related Art
The production of hydrocarbons from sub-surface locations typically includes the drilling of a borehole into the earth in a location where hydrocarbons are likely to be found, physically isolating the borehole from the earth surrounding the borehole by the placement of casing therein, cementing the casing in place, and penetrating the casing at zones known (or suspected) to have producible quantities of hydrocarbons. This enables the hydrocarbons to flow into the casing and then be pumped or otherwise flowed to the surface.
The location of zones likely to produce hydrocarbons is often determined by passing a tool, commonly known as a logging tool, along the length of the borehole. The logging tool may be conveyed into the borehole using a conveyance member, such as an electric wireline, a slickline, a coiled tubing or a jointed pipe. Certain logging tools, such as spectral saturation tools and gamma ray tools, are configured to operate with a particular conveyance member, such as slickline. Other types of logging tools, such as segmented bond tools, casing collar locator tools and sondes described in U.S. Pat. No. 5,081,351 and wireline logging tools described in U.S. Pat. No. 5,608,215 (both of which are incorporated herein by reference), are configured to operate with another type of conveyance member, such as wireline. Thus, each time a user wants to change one logging tool that is conveyable with slickline to another logging tool that is conveyable with wireline, the user would have to change not only the logging tool, but also the conveyance member. Such practice can be cumbersome and time-consuming.
Therefore, a need exists in the art for an improved system and method for logging formations surrounding a wellbore.
SUMMARY OF THE INVENTION
Various embodiments of the invention are directed to a system for logging a formation adjacent to a borehole. The system includes a conveyance member, a memory module in communication with the conveyance member, a communications module in communication with the memory module, and a logging tool in communication with the communications module, wherein the communications module is configured to facilitate communication between the memory module and the logging tool.
Various embodiments of the invention are also directed to a method for facilitating communication between a logging tool and a memory module in connection with operating a logging system. The method includes receiving a connection signal from the logging tool and determining a power requirement for operating the logging tool and a filtering scheme for processing signals received from the logging tool.
Various embodiments of the invention are also directed to a method for operating a logging system. The method includes coupling a logging tool to a communications module, coupling the communications module to a memory module, coupling the memory module to a conveyance member, configuring the communications module for compatibility with the logging tool, sending analog signals from the logging tool to the communications module, wherein the analog signals contain information about one or more formations surrounding a wellbore and converting the analog signals to a format readable by the memory module.
BRIEF DESCRIPTION OF THE DRAWINGS
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
FIG. 1 illustrates a block diagram of a logging system in accordance with one or more embodiments of the invention.
FIG. 2 illustrates the communications module in greater detail in accordance with one or more embodiments of the invention.
FIG. 3 illustrates a flow diagram of a method for operating a logging system in accordance with one or more embodiments of the invention.
DETAILED DESCRIPTION
FIG. 1 illustrates a block diagram of a logging system 100 in accordance with one or more embodiments of the invention. The logging system 100 may be used for measuring information about the formations that surround a wellbore. The logging system 100 includes a memory module 10 coupled to a communications module 20, which may often be referred to as a communications sub by persons of ordinary skill in the art. The memory module 10 may also be coupled to a slickline conveyance member 30 or a wireline conveyance member 40. The memory module 10 may be coupled to the wireline conveyance member 40 via a telemetry module 60. The term “coupled” as used in this application may be defined as in communication with and may involve any type of coupling, including mechanical, electrical and optical coupling.
Generally, the wireline conveyance member 40 is a multi-strand wire or cable for use in oil or gas wells. Wireline typically comprises at least a single insulated electrical conductor cable surrounded by a plurality of braided cables, which provide structural support for the single insulated electrical conductor cable during transport of the wireline into the wellbore.
Generally, the slickline conveyance member 30 is a single-strand non-conductive wire with an outer diameter between 3/16″ to ⅜″. The slickline can be made from a variety of materials, from mild steel to alloy steel. The slickline can be 10,000 feet or more in length. For larger sizes, a braided wire construction may be utilized. The braided wire, for all practical purposes, has similar functional characteristics as a solid wire. Such braided wire is therefore considered to be a slickline.
Although various embodiments of the invention are described with reference to the slickline conveyance member 30 or the wireline conveyance member 40, other embodiments may be used in connection with other types of conveyance member, such as a continuous reelable rod (COROD), jointed pipe and coiled tubing. A COROD string is typically made from a round cross section solid or near solid rod having for example a ¾″ outer diameter. While the outer diameter dimensions may vary, the relatively small diameter to thickness ratios of COROD are distinctive. For COROD with a small inner diameter such as ⅛″ and an outer diameter of 1⅛″, the diameter to thickness ratio is about 2.25. If the inner diameter of such a 1⅛″ COROD were larger than ⅛″, the diameter to thickness ratio would increase correspondingly. The diameter to thickness ratios for COROD is however significantly less than those for coiled tubing for which the ratios are typically 15 and higher. Unlike jointed sucker rod that is made in specific lengths and threaded at each end for sequential connection of those lengths, COROD is made in one continuous length and placed on a reel. Other details of COROD are described in commonly assigned U.S. patent application Ser. No. 11/026,963, filed Dec. 30, 2004, which is incorporated herein by reference.
The functionality of the memory module 10 may be determined according to whether the memory module 10 is connected to the slickline conveyance member 30 or the wireline conveyance member 40 (via the telemetry module 60). If the memory module 10 is configured to be used with the slickline conveyance member 30, the memory module 10 will function as a data collector. If the memory module 10 is configured to be used with the wireline conveyance member 40, the memory module 10 will function as a log backup. The telemetry module 60 is configured to poll the memory module 10 for log data and transmit the log data up the wireline to the surface computers for surface storage and data reduction.
The communications module 20 is coupled to a logging tool 50. The logging tool 50 may be any type of logging tools. For instance, the logging tool 50 could be a pulse neutron logging tool, a spectral saturation logging tool, a segmented bond logging tool or any other logging tool commonly known by persons of ordinary skill in the art.
The communications module 20 is configured to provide a communication link between the logging tool 50 and the memory module 10. The communications module 20 may be configured to facilitate communication between the memory module 10 and a variety of logging tools. The communications module 20 may also be configured to facilitate communication between the memory module 10 and a plurality of logging tools at the same time.
FIG. 2 illustrates the communications module 20 in greater detail in accordance with one or more embodiments of the invention. The communications module 20 may include a power supply 240, a data conversion module 230, a digital signal processor 220, a local memory 210, a central processing unit (CPU) 260 and a hardware filter 250. The power supply 240 may be configured to provide power to a logging tool connected to the communications module 20. The power supply 240 may also be configured to provide power to the memory module 10. Alternatively, the memory module 10 may have its own power supply.
The data conversion module 230 may be configured to convert analog signals containing information about formations surrounding the wellbore to a format (i.e., digital) readable by the memory module 10. The digital signal processor 220 may be configured to process the digital signals for the required information. The local memory 210 may be configured to store the digital signals. The local memory 210 may also include a library of power and filtration schemes/requirements sorted by tool identification numbers. The local memory 210 may also include computer programs that may be used by the CPU 260 in operating various embodiments of the invention. The CPU 260 may include one or more conventionally available microprocessors to perform various operations in accordance with one or more embodiments of the invention. The hardware filter 250 may be configured to filter analog signals that are transmitted from the logging tool to the data conversion module 230.
Although embodiments of the invention are described with reference to one communications module 20 operable with all types of logging tools, other embodiments contemplate the use of one communications module 20 for each type of logging tool.
FIG. 3 illustrates a flow diagram of a method 300 for operating a logging system in accordance with one or more embodiments of the invention. At step 310, the communications module 20 is connected to a logging tool. The logging tool may be a pulse neutron logging tool, a spectral saturation logging tool, a segmented bond logging tool or any other logging tool commonly known by persons of ordinary skill in the art. For example, the logging tool may include a Penning ion source, such as the type described in U.S. Pat. No. 4,996,017, entitled NEUTRON GENERATOR TUBE, issued Feb. 26, 1991 to D. Ray Ethridge, which is incorporated herein by reference. As such, the pulsed neutron generator may operate at a frequency between about 500 Hz to about 30 kHz. The logging tool may also include scintillation detectors, which may include a gadolinium-containing material, such as gadolinium orthosilicate that is suitably doped, for example with cerium, to activate for use as a scintillator.
Once the logging tool is connected to the communications module 20, the communications module 20 is able to determine a set of information about the logging tool (step 320). For example, the set of information may include a tool identification number, a power scheme required to operate the logging tool and a filtration scheme for processing signals received from the logging tool.
In one embodiment, the set of information may be determined by having the communications module 20 send a query signal to the logging tool. Upon receipt of the query signal, the logging tool returns a tool identification number to the communications module 20. The communications module 20 then uses the tool identification number to determine the power scheme requirement and the filtration scheme for the logging tool. In making that determination, the communications module 20 may use a library that contains power and filtration schemes for various logging tools. The library may be part of the local memory 210. The filtration schemes contemplated by embodiments of the invention may include requirements for time truncating the signals, removing irrelevant signals, identifying relevant signals based on frequency and amplitude, and filtering out dead time. For example, one filtration scheme may filter out all signals having frequency that are outside of the 500 Hz to 30 kHz range. In this manner, the communications module 20 may be configured for compatibility with the logging tool 50.
In another embodiment, the set of information may be determined by having the communications module 20 send a query signal to the logging tool. Upon receipt of the tool identification number, the communications module 20 communicates with the memory module 10 to determine the appropriate power and filtration schemes for the logging tool.
In the event that no tool identification number is provided to the communications module 20, the tool identification number along with the power and filtration schemes may be provided manually by a user.
In one or more embodiments, the tool identification number may be retrieved from an identification computer chip disposed on the logging tool. The identification chip may be attached to the logging tool by solder or any other means commonly known by persons of ordinary skill in the art.
At step 330, the power supply 240 supplies power to the logging tool. The amount of power supplied to the logging tool may be based on the power requirement for that particular logging tool. The amount of power may vary according to the type of logging tool.
Upon receipt of power from the communications module 20, the logging tool generates signals to the formations surrounding a wellbore and receives the signals emanating from the formations (step 340). The signals may be generated continuously or periodically according to the type of logging tool. The logging tool then sends the received signals to the data conversion module 230 (step 350). The signals may be forwarded to the data conversion module 230 as soon as the signals are received or on a periodic basis. Generally, the received signals are in analog format.
Upon receipt of the analog signals from the logging tool, the data conversion module 230 converts the analog signals to a format readable by the memory module (step 360). The analog signals may be converted using one or more of the above referenced filtration schemes. In one embodiment, the analog signals are converted to digital signals, which may commonly be referred to as digital data by persons of ordinary skill in the art.
In one embodiment, irregularities that are typically caused by noise may be removed from the digital signals (step 370). As such, the data conversion module 230 may forward the digital signals to the digital signal processing (DSP) 220, which removes the irregularities that are typically caused by noise, thereby leaving only the relevant portions of the digital signals. The DSP 220 then sends the relevant portions of the digital signals to the local memory 210 (step 380).
The memory module 10 is configured to periodically poll the local memory 210 for the digital signals. Upon receipt of the request from the memory module 10, a copy of the digital signals is transferred to the memory module 10 (step 380). The digital signals may then be used by a data acquisition member to correlate data from the depth encoder reading to define data points at various locations in the wellbore. This information may then be used to form a log of measured data as a function of depth within the wellbore at which the signals were recorded.
In one embodiment, a hardware filter 250 may be disposed on a path between the logging tool and the data conversion module 230. The hardware filter 250 may be used to filter the analog signals that are being transmitted from the logging tool to the data conversion module 230. The analog signals may be filtered based on frequency or voltage requirements. The hardware filter 250 may be used in lieu of or in addition to the above referenced filtration schemes used by the data conversion module 230.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Malloy, Robert (Katy, TX, US)
Senn, Stephen (Conroe, TX, US)
Standley, Tom (Coldspring, TX, US)
Pitts, Robert (Houston, TX, US)
| 2379800 | July, 1945 | Hare | Signal transmission system | |
| 2414719 | January, 1947 | Cloud | Transmission system | |
| 2469461 | May, 1949 | Russell | Gamma-ray logging | |
| 2469463 | May, 1949 | Russell | Neutron logging of wells | |
| 2470743 | May, 1949 | Hochgesang et al. | Method and apparatus for geophysical prospecting | |
| 2508722 | May, 1950 | Loesser | Collapsible tube holder | |
| 2659014 | November, 1953 | Scherbatskoy | Radioactivity well logging system | |
| 2782318 | February, 1957 | Hersog | Radioactivity earth exploration | |
| 2862106 | November, 1958 | Scherbatskoy | Apparatus for deep-well logging | |
| 2910591 | October, 1959 | Baker | Carbon logging through casing | |
| 2933609 | April, 1960 | Norelius | Radioactivity well surveying | |
| 2949535 | August, 1960 | Scherbatskoy | Nuclear well logging method and apparatus | |
| 2993994 | July, 1961 | Herzog | Radiation well logging | |
| 3071687 | January, 1963 | Youmans | Geophysical prospecting methods and apparatus | |
| 3090031 | May, 1963 | Lord | Signal transmission system | |
| 3090867 | May, 1963 | Swanson | Method of and apparatus for radioactivity well logging | |
| 3121164 | February, 1964 | Swift | Geophysical prospecting method by means of nuclear radiation | |
| 3147378 | September, 1964 | Hall, Jr. | Radioactivity well logging | |
| 3151242 | September, 1964 | Hall, Jr. | Radioactivity well logging | |
| 3219820 | November, 1965 | Hall, Jr. | Radioactivity well logging for detecting hydrogen and chlorine | |
| 3240937 | March, 1966 | McKay | Radioactivity well logging for deter-mining the presence of hydrogen | |
| 3240938 | March, 1966 | Hall, Jr. | Radioactivity well logging for determining the presence of hydrogen and chlorine | |
| 3244880 | April, 1966 | Owen | Neutron and gamma ray well logging for chlorine content | |
| 3247377 | April, 1966 | Hall, Jr. | Scintillation-type well logging device with two crystals responding separately to thermal neutrons and gamma rays | |
| 3265893 | August, 1966 | Rabson | Temperature stabilized radioactivity well logging unit | |
| 3413472 | November, 1968 | Caldwell | Logging system and method for identifying anhydrites | |
| 3439165 | April, 1969 | Hopkinson | RADIOACTIVE WELL LOGGING SYSTEM HAVING A MULTIPLE CONDUCTOR CABLE | |
| 3461291 | August, 1969 | Goodman | WELL LOGGING DEVICE USING A PULSED SOURCE OF MONOENERGETIC NEUTRONS | |
| 3490280 | January, 1970 | Fields | METHODS AND APPARATUS FOR LOGGING UNDERWATER WELL BORES | |
| 3532884 | October, 1970 | Dewan | MULTIPLE DETECTOR NEUTRON LOGGING TECHNIQUE | |
| 3559905 | February, 1971 | Palynchuk | 7 | |
| 3564248 | February, 1971 | Hopkinson et al. | METHOD AND APPARATUS FOR CALIBRATING PULSED NEUTRON WELL LOGGING INSTRUMENT | |
| 3566682 | March, 1971 | Winkler, Jr. | ||
| 3611799 | October, 1971 | Davis | ||
| 3696332 | October, 1972 | Dickson et al. | TELEMETERING DRILL STRING WITH SELF-CLEANING CONNECTORS | |
| 3755782 | August, 1973 | Haas et al. | COMMUNICATION SYSTEM POLLING METHOD | |
| 3772513 | November, 1973 | Hall, Jr. | RADIOACTIVITY OIL-WATER WELL LOGGING UTILIZING NEUTRON SOURCE | |
| 3780301 | December, 1973 | Smith, Jr. et al. | PULSED NEUTRON LOGGING SYSTEMS FOR DETECTING GAS ZONES | |
| 3831138 | August, 1974 | Rammner | APPARATUS FOR TRANSMITTING DATA FROM A HOLE DRILLED IN THE EARTH | |
| 3930153 | December, 1975 | Scott | Measurement of subsurface formation lithology, including composition and fluids, using capture gamma spectroscopy | |
| 3988581 | October, 1976 | Peelman | Radioactive well logging system with shale (boron) compensation by gamma ray build-up | |
| 4002903 | January, 1977 | Pitts, Jr. | Simultaneous thermal neutron decay time and shale compensated chlorine log system | |
| 4066892 | January, 1978 | Givens | Coal logging system | |
| 4095865 | June, 1978 | Denison et al. | Telemetering drill string with piped electrical conductor | |
| 4226116 | October, 1980 | Denison | Logging while raising a drill string | |
| 4227405 | October, 1980 | West | Digital mineral logging system | |
| 4320800 | March, 1982 | Upchurch | Inflatable packer drill stem testing system | |
| 4327290 | April, 1982 | Plasek | Method and apparatus for nuclear well logging with optimized timing for simultaneous measurement of thermal neutron decay time and gamma ray pulse height spectra | |
| 4355310 | October, 1982 | Belaigues et al. | Well logging communication system | |
| 4404467 | September, 1983 | Schweitzer | Salinity and lithology determination from the sodium and chlorine activation lines | |
| 4445734 | May, 1984 | Cunningham | Telemetry drill pipe with pressure sensitive contacts | |
| 4457370 | July, 1984 | Wittrisch | Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions | |
| 4459480 | July, 1984 | Dimon | Use of pulsed neutron logging to evaluate perforation washing | |
| 4460038 | July, 1984 | Clamens | Installation for testing a well and a process for use thereof | |
| 4490788 | December, 1984 | Rasmussen | Well-logging data processing system having segmented serial processor-to-peripheral data links | |
| 4510797 | April, 1985 | Guidry et al. | Full-bore drill stem testing apparatus with surface pressure readout | |
| 4566318 | January, 1986 | Rao et al. | Method for optimizing the tripping velocity of a drill string | |
| 4570480 | February, 1986 | Fontenot et al. | Method and apparatus for determining formation pressure | |
| 4580632 | April, 1986 | Reardon | Well tool for testing or treating a well | |
| 4585939 | April, 1986 | Arnold et al. | Multi-function natural gamma ray logging system | |
| 4605268 | August, 1986 | Meador | Transformer cable connector | |
| 4628202 | December, 1986 | Minette | Method and apparatus for gamma ray well logging | |
| 4645926 | February, 1987 | Randall | Method for induced gamma ray logging | |
| 4656354 | April, 1987 | Randall | Method for induced gamma ray logging | |
| 4682657 | July, 1987 | Crawford | Method and apparatus for the running and pulling of wire-line tools and the like in an oil or gas well | |
| 4695955 | September, 1987 | Faisandier | Electronic device providing a universal interface between sensors and an acquisition and processing unit of the signals originating from said sensors | |
| 4721853 | January, 1988 | Wraight | Thermal decay time logging method and apparatus | |
| 4788544 | November, 1988 | Howard | Well bore data transmission system | |
| 4790378 | December, 1988 | Montgomery et al. | Well testing apparatus | |
| 4794336 | December, 1988 | Marlow et al. | Apparatus for surveying a borehole comprising a magnetic measurement probe to be moved within a drill pipe to a measurment position within a non-magnetic collar | |
| 4794791 | January, 1989 | Wittrisch | Method and device for making measurements characterizing geological formations, in a horizontal borehole formed from an underground way | |
| 4806928 | February, 1989 | Veneruso | Apparatus for electromagnetically coupling power and data signals between well bore apparatus and the surface | |
| 4833320 | May, 1989 | Hurlbut | High-temperature well logging instrument with plastic scintillation element | |
| 4883956 | November, 1989 | Melcher et al. | Methods and apparatus for gamma-ray spectroscopy and like measurements | |
| 4898236 | February, 1990 | Sask | Drill stem testing system | |
| 4901069 | February, 1990 | Veneruso | Apparatus for electromagnetically coupling power and data signals between a first unit and a second unit and in particular between well bore apparatus and the surface | |
| 4918314 | April, 1990 | Sonne | Gain stabilization circuit for photomultiplier tubes | |
| 4996017 | February, 1991 | Ethridge | Neutron generator tube | |
| 5010764 | April, 1991 | Taylor | Method and apparatus for logging short radius horizontal drainholes | |
| 5019978 | May, 1991 | Howard et al. | Depth determination system utilizing parameter estimation for a downhole well logging apparatus | |
| 5042297 | August, 1991 | Lessi | Well-logging process and device in a non-flowing production well | |
| 5053620 | October, 1991 | McKeon | Logging apparatus and method for determining concentrations of subsurface formation elements | |
| 5080175 | January, 1992 | Williams | Use of composite rod-stiffened wireline cable for transporting well tool | |
| 5081351 | January, 1992 | Roscoe et al. | Method and apparatus for borehole correction in capture gamma ray spectroscopy measurements | |
| 5097123 | March, 1992 | Grau et al. | Broad energy spectra neutron source for logging and method | |
| 5172765 | December, 1992 | Sas-Jaworsky et al. | Method using spoolable composite tubular member with energy conductors | |
| 5184682 | February, 1993 | Delacour et al. | Device allowing measurements or interventions to be carried out in a well, method using the device and applications of the device | |
| 5217075 | June, 1993 | Wittrisch | Method and device for carrying out interventions in wells where high temperatures prevail | |
| 5234058 | August, 1993 | Sas-Jaworsky et al. | Composite rod-stiffened spoolable cable with conductors | |
| 5279366 | January, 1994 | Scholes | Method for wireline operation depth control in cased wells | |
| 5348097 | September, 1994 | Giannesini et al. | Device for carrying out measuring and servicing operations in a well bore, comprising tubing having a rod centered therein, process for assembling the device and use of the device in an oil well | |
| 5351531 | October, 1994 | Kerr | Depth measurement of slickline | |
| 5394141 | February, 1995 | Soulier | Method and apparatus for transmitting information between equipment at the bottom of a drilling or production operation and the surface | |
| 5410152 | April, 1995 | Gadeken | Low-noise method for performing downhole well logging using gamma ray spectroscopy to measure radioactive tracer penetration | |
| 5488989 | February, 1996 | Leising et al. | Whipstock orientation method and system | |
| 5505259 | April, 1996 | Wittrisch et al. | Measuring device and method in a hydrocarbon production well | |
| 5530359 | June, 1996 | Habashy et al. | Borehole logging tools and methods using reflected electromagnetic signals | |
| 5581024 | December, 1996 | Meyer, Jr. et al. | Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements | |
| 5585726 | December, 1996 | Chau | Electronic guidance system and method for locating a discrete in-ground boring device | |
| 5608214 | March, 1997 | Baron et al. | Gamma ray spectral tool for well logging | |
| 5608215 | March, 1997 | Evans | Method and apparatus for determining density of earth formations | |
| 5635631 | June, 1997 | Yesudas et al. | Determining fluid properties from pressure, volume and temperature measurements made by electric wireline formation testing tools | |
| 5636686 | June, 1997 | Wittrisch | Measuring assembly comprising means for orienting a part of the measuring elements | |
| 5740864 | April, 1998 | De Hoedt et al. | One-trip packer setting and whipstock-orienting method and apparatus | |
| 5749417 | May, 1998 | Delatorre | Production log | |
| 5753813 | May, 1998 | Hagiwara | Apparatus and method for monitoring formation compaction with improved accuracy | |
| 5799733 | September, 1998 | Ringgenberg et al. | Early evaluation system with pump and method of servicing a well | |
| 5829520 | November, 1998 | Johnson | Method and apparatus for testing, completion and/or maintaining wellbores using a sensor device | |
| 5945923 | August, 1999 | Soulier | Device and method for transmitting information by electromagnetic waves | |
| 5947213 | September, 1999 | Angle et al. | Downhole tools using artificial intelligence based control | |
| 6041860 | March, 2000 | Nazzal et al. | Apparatus and method for performing imaging and downhole operations at a work site in wellbores | |
| 6101445 | August, 2000 | Alvarado et al. | Apparatus, system and method to transmit and display acquired well data in near real time at a remote location | |
| 6114972 | September, 2000 | Smith | Electromagnetic resistivity tool and method for use of same | |
| 6157761 | December, 2000 | Wittrisch | Reinforced composite rod | |
| 6173773 | January, 2001 | Almaguer et al. | Orienting downhole tools | |
| 6173787 | January, 2001 | Wittrisch | Method and system intended for measurements in a horizontal pipe | |
| 6177882 | January, 2001 | Ringgenberg et al. | Electromagnetic-to-acoustic and acoustic-to-electromagnetic repeaters and methods for use of same | |
| 6179058 | January, 2001 | Wittrisch | Measuring method and system comprising a semi-rigid extension | |
| 6218959 | April, 2001 | Smith | Fail safe downhole signal repeater | |
| 6247542 | June, 2001 | Kruspe et al. | Non-rotating sensor assembly for measurement-while-drilling applications | |
| 6318463 | November, 2001 | Fehrmann et al. | Slickline fluid indentification tool and method of use | |
| 6459263 | October, 2002 | Hawkes et al. | Nuclear magnetic resonance measurements in well logging using motion triggered pulsing | |
| 6516663 | February, 2003 | Wong | Downhole electromagnetic logging into place tool | |
| 6520264 | February, 2003 | MacKenzie et al. | Arrangement and method for deploying downhole tools | |
| 6575241 | June, 2003 | Widney et al. | Downhole communication apparatus | |
| 6649906 | November, 2003 | Adolph et al. | Method and apparatus for safely operating radiation generators in while-drilling and while-tripping applications | |
| 6693553 | February, 2004 | Ciglenec et al. | 340/853.1 | Reservoir management system and method |
| 6703606 | March, 2004 | Adolph | Neutron burst timing method and system for multiple measurement pulsed neutron formation evaluation | |
| 6736210 | May, 2004 | Hosie et al. | Apparatus and methods for placing downhole tools in a wellbore | |
| 6777940 | August, 2004 | Macune | 324/338 | Apparatus and method for resistivity well logging |
| 20020170711 | November, 2002 | Nuth | Apparatus and methods for conveying instrumentation within a borehole using continuous sucker rod | |
| 20030070842 | April, 2003 | Balley et al. | Methods and apparatus to control downhole tools | |
| 20030090390 | May, 2003 | Snider et al. | Method and system for performing operations and for improving production in wells | |
| 20030156494 | August, 2003 | McDaniel et al. | Memory cement bond logging apparatus and method | |
| 20040146133 | July, 2004 | Leung et al. | Ultra-short ion and neutron pulse production |
U.K. Examination Report, Application No. GB0417792.9, dated Feb. 23, 2005.
The Shale Compensated Chlorine Log, (SPE4511), P.F. McKinlay and H. L. Tanner, presented at SPE-AIME 1974.
Cased Hole Evaluation with Chlorine Log, (SPE13141) J. M. Deimel, D.G. Andrus, presented at SPE-AIME 1984.
PCT International Search Report from International application No. PCT/GB02/00286, Dated Apr. 12, 2002.
PCT International Search Report from International Application PCT/GB02/00240, dated Jun. 27, 2002.
U.S. Appl. No. 09/778,357, Filed Feb. 6, 2001, Arnold Wong, “Downhole Electromagnetic Logging Into Place Tool.”
Wiltse, D.J., “Fishing Jobs Using Continuous Rod,” Weatherford Artificial Lift System, Mar. 30, 1999, 1 Page.
C-Tech Energy, Inc., Premier Petroleum Wellbore Steel Design, Fabrication Products and . . . “Pro-Rod: Colled Rod Product Line” http://www.ctechenergy.com/ and http://www.ctechenergy.com/prorod—p.html Copyright 2001, 4 Pages.
PCT Partial International Search Report form International Application No. PCT/GB02/01827, dated Jul. 17, 2002.
PCT Written Opinion, International Application No. PCT/GB02/01827, dated Jun. 18, 2003.
Combine Search and Examination Report, Application No.:0607868.7, Dated Aug. 29, 2006.
GB Search Report, Application No. GB0607868.7, dated Jun. 27, 2007.
System for logging formations surrounding a wellbore