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1.发明授权
公开(公告)号：US3896413A
公开(公告)日：1975-07-22
申请号：US43708974
申请日：1974-01-28
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , BOYD JOHN F
Abstract: A method and apparatus which describe a technique for measuring formation porosity in a formation adjacent to a wellbore. A sonde is lowered to a desired depth in a well adjacent to a formation of interest. The sonde includes magentic poles which form lines of flux in the formation. Intermediate of the magnetic poles is a current electrode. A return path for the current electrode is completed preferably at the surface. The current flow path in the formation from the current electrode is approximately perpendicular to the magnetic flux lines. The two fields impinge on fluids located in the interstices of the formation, creating localized pressure which is relieved by fluid flow in the formation. The fluid flow is accompanied by noise created by the fluid interacting with the formation which defines many serpentine and erratic flow paths. The noise is heard by a wide band acoustic listening device. The noise is related to a permeability of the formation.
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2.发明授权
公开(公告)号：US3902113A
公开(公告)日：1975-08-26
申请号：US45095874
申请日：1974-03-14
Applicant: TEXACO INC
Inventor： BRIDGES JAMES R , DOWLING DONALD J
CPC classification number: G01V3/22
Abstract: Apparatus at two different time intervals in each cycle of operation induces electrical polarization of an earth formation in a manner that each polarization is in an opposite direction to the polarization preceding and succeeding it. A measuring circuit controlled by timing logic measures the induced electrical potential at two different locations during two other time intervals in each cycle of operation. A difference amplifier provides a potential difference signal in accordance with the measured potentials. During one of the two measuring time intervals of each cycle, the difference signal is inverted. The signal which is not inverted and the inverted difference signal are integrated to provide an output to recording means to record the measured decay potentional difference.
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公开(公告)号：US3657636A
公开(公告)日：1972-04-18
申请号：US3657636D
申请日：1970-01-02
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , ATWOOD GEORGE R
CPC classification number: G01V3/28
Abstract: A borehole magnetic susceptibility apparatus is disclosed which includes a transmitter search coil, a receiver search coil, both wound over a low thermal co-efficient core element such as glass, an AC power supply coupled with the transmitter search coil for generating an alternating magnetic field which after passing at least in part through the earth formation couples magnetically with the receiver search coil for inducing therein a voltage signal dependent in part on the magnetic susceptibility of the formation and which is in quadrature phase relationship with the transmitter coil current. The apparatus includes a nulling coil having a primary winding connected in series with the transmitter coil and a secondary winding connected in series opposition with the receiver coil to render detectable the small variations of the quadrature phase signal representing the magnetic susceptibility. A thermally stable and shock resistent subassembly of the transmitter and receiver search coils is provided for improved environmental stability of the tool. The method of subjecting the earth formation to an alternating magnetic field to induce therein a field which depends on the magnetic susceptibility of the formation, detecting the induced magnetic field by permitting it to act on a receiver element to induce therein a first signal which depends on the magnetic susceptibility of the formation, generating a reference second signal representing the susceptibility of a reference medium, and generating a third signal corresponding the difference between the first and second signal whereby the third signal represents the magnetic susceptibility of the formation with respect to the magnetic susceptibility of the reference medium.
Abstract translation: 公开了一种钻孔磁化率装置，其包括发射机搜索线圈，接收机搜索线圈，两者都绕过诸如玻璃的低热系数芯片元件，与发射机搜索线圈耦合以产生交变磁场的AC电源 其在至少部分地通过地层通过之后与接收机搜索线圈磁耦合，以便在其中诱导部分取决于地层的磁化率并且与发射机线圈电流处于正交相位关系的电压信号。 该装置包括具有与发射器线圈串联连接的初级绕组的零线圈和与接收器线圈串联对置的次级绕组，以便可检测到表示磁化率的正交相位信号的小变化。 提供发射机和接收机搜索线圈的热稳定和抗冲击子组件，用于改善工具的环境稳定性。 对地球构造进行交变磁场的方法是在其中诱导取决于地层的磁化率的场，通过允许其作用在接收器元件上以诱导其中依赖于第一信号的第一信号来检测感应磁场 产生表示基准介质的磁化率的参考第二信号，并产生对应于第一和第二信号之间的差的第三信号，由此第三信号表示地层相对于磁场的磁化率 参考介质的易感性。
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4.发明授权
公开(公告)号：US3368196A
公开(公告)日：1968-02-06
申请号：US55299666
申请日：1966-04-12
Applicant: TEXACO INC
Inventor： MAZZAGATTI ROY P , DOWLING DONALD J , CAUSEY CLOY N
IPC: G01V1/44
CPC classification number: G01V1/44
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5.发明授权
公开(公告)号：US3890563A
公开(公告)日：1975-06-17
申请号：US40920373
申请日：1973-10-24
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , SAVAGE KERRY D
CPC classification number: G01V3/28
Abstract: Magnetic susceptibility bore hole logging method for distinguishing ferromagnetic materials from the paramagnetic materials. It involves logging the bore hole with and without a unidirectional magnetic field being applied to the formations being logged. The differences between these logs indicate ferromagnetic materials if the field strength is sufficient to cause saturation. Apparatus employs a permanent magnet or an electromagnet for creating the saturating field.
Abstract translation: 用于区分铁磁材料与顺磁材料的磁化率钻孔测井方法。 它包括记录钻孔，并且不存在将单向磁场施加到被记录的地层。 如果场强足以引起饱和，则这些日志之间的差异表示铁磁材料。 装置采用永久磁铁或电磁铁来产生饱和场。
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Patent Agency Ranking
公开(公告)号：US3644823A
公开(公告)日：1972-02-22
申请号：US3644823D
申请日：1970-01-02
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , ATWOOD GEORGE R
CPC classification number: G01V3/28
Abstract: Disclosed is an improved logging apparatus having sufficient sensitivity and environmental stability suitable for magnetic susceptibility logging which includes a transmitter search coil, a receiver search coil, a power supply for providing alternating current power to the transmitter coil and an improved nulling coil including a primary winding wired in series opposition with the receiver coil. The nulling coil includes construction and mounting features uniquely suitable to render detectable the small quadrature phase signal representing the magnetic susceptibility of borehole formations.
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7.发明授权Magnetic susceptibility logging system with transmitter and receiver null coils 失效具有发射器和接收器的线圈的磁性可靠性记录系统
公开(公告)号：US3555409A
公开(公告)日：1971-01-12
申请号：US3555409D
申请日：1969-10-06
Applicant: TEXACO INC
Inventor： ATWOOD GEORGE R , DOWLING DONALD J
CPC classification number: G01V3/28
Abstract: A BOREHOLE LOGGING TOOL THAT INCLUDES AIR CORE TRANSMITTER AND RECEIVER COILS PLUS AUXILIARY AIR CORE NULLING COILS. A COMPENSATED MAGNETIC INDUCTION CIRCUIT IS EMPLOYED FOR NULLING A MAJOR PORTION OF THE RECEIVER COIL SIGNALS, IN ORDER THAT THE CHANGES CAUSED BY MAGNETIC PROPERTY CHANGE IN THE SURROUNDING BOREHOLE, MAY BE READILY DETECTED. THE AUXILIARY NULLING COILS ARE PANCAKE SHAPED AND ARE LOCATED OUTSIDE THE FIELDS OF THE TRANSMITTER AND RECEIVER COILS. BUT THEY ARE LOCATED ON THE LOGGING TOOL SO THAT THEY ARE SUBJECT TO THE SAME AMBIENT CONDITIONS AS ARE THE TRANSMITTER AND RECEIVER COILS.
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8.发明授权
公开(公告)号：US3900826A
公开(公告)日：1975-08-19
申请号：US41156173
申请日：1973-10-31
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , BOYD JOHN F
CPC classification number: G01V1/44
Abstract: A permeability logging tool adapted to be lowered to selected elevations in a well bore wherein fluids in any pore spaces in the formation adjacent to the well bore are excited by means of high peak amplitude acoustic pulses of short duration which form compressive and rarefaction wave fronts in the formation, thereby altering localized formation fluid pressure and creating a flow path from a point of high pressure to a point of relatively low pressure. A pair of sonic transceivers used as measuring transducers are also included on the tool. Acoustic signals are transmitted to and fro between these transducers. The change in signal transmission time between the transceivers due to fluid flow rate established by the electrical excitation is measured. The shift in transmission time between the measuring transducers is thus proportionate to the rate of fluid flow in the formation. This shift in time is thus fuctionally related to the permeability of the formation matrix material.
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公开(公告)号：US3890502A
公开(公告)日：1975-06-17
申请号：US42687373
申请日：1973-12-20
Applicant: TEXACO INC
Inventor： DOWLING DONALD J , BOYD JOHN F , FUCHS JAMES A
CPC classification number: G01V5/102
Abstract: Comparative measurements of thermal neutron decay time are obtained for a formation after irradiation with a pulsed neutron source. Chloride ions in formation fluids are concentrated by the electrosmosis effect using charged poles on a well logging sonde. The formation is irradiated with fast neutrons and a first comparative measure of the thermal neutron decay time or neutron lifetime is taken. The chloride ions are then disbursed by acoustic pumping with a magnetostrictive transducer. The formation is then again irradiated with fast neutrons and a comparative measure of neutron lifetime is taken. The comparison is a function of the variation in chloride concentration between the two measurements which is related to formation permeability.
Abstract translation: 在用脉冲中子源照射后的地层中获得热中子衰变时间的比较测量。 地层流体中的氯离子通过使用带电极在测井仪上的电渗效应进行浓缩。 用快中子照射地层，并采取热中子衰变时间或中子寿命的第一个比较测量。 然后用磁致伸缩换能器通过声学泵浦来分配氯离子。 然后再用快中子再次照射形成，并采用中子寿命的比较测量。 该比较是与地层渗透性相关的两次测量之间的氯化物浓度的变化的函数。
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10.发明授权Acoustical well logging tool having low acoustical velocity between transducers 失效声波测井仪在传感器之间具有较低的声速
公开(公告)号：US3144090A
公开(公告)日：1964-08-11
申请号：US79239159
申请日：1959-02-10
Applicant: TEXACO INC
Inventor： MAZZAGATTI ROY P , SAVAGE KERRY D , DOWLING DONALD J
IPC: G01V1/52
CPC classification number: G01V1/52
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