NO338464B1 - A method of wireline logging of a production well using pulse-wave ultrasound and such a tool. - Google Patents

Description

Introduction

The present invention is a combined ultrasound imaging and Doppler wireline probe device. More specifically, the present invention is an el wlreline logging apparatus that serves a twofold purpose: A dangerous formal is uKralyd caliper for production rervsggen in a petroleum watch production fire or the like. Another purpose is in the field Doppler measurements of flow velocities of fluids in the fire, spatially for i mile eflow velocities (the annulus fluid that surrounds the production vessel. The logging probe can be controlled from the surface to switch between the above operational modes.

Background technology

An overview of ultrasound probe setups is described in NASA Preferred Trusted Health Practices, Practioe NO. PT-TE-1422, "Ultrasonic testing of aerospace materials", pp. 1-3. The document presents 1) the Mils-ecto-malode in which the ultrasonic transmitter and receiver are combined and placed on one side of the object to be tested,

2} the oltch-catch method in which the ultrasonic transmitter and the corresponding receiver are placed on the same surface of the material to be tested, and 3) the ultrasonic transmitter and the corresponding receiver are placed on the same surface of the material to be read, whereby the uttratonic energy is ignited with a wave! and received at an angle. With these three transmitter - receiver setups, Internal counts can be found.

US4947683 Mlnear et al., "Pulsed ultrasonic Doppler borehole Huld measuring apparatus", published 14.05.1990, describes a log ton consumption in a production fire. extensive centering units for centering the probe for forming an annular tightening around it within the production channel. The logging probe comprises an ultrasonic transmitter/receiver mounted on the lower part of a probe pointing downwards and at an angle away from the direction of the probe and the borehole, please say that Flg. 2. The transmitter / receiver tamtientttjlHng is rotated about the vertical axis of the probe in order for the transmitter / receiver to sweep out a conical surface through the upward-framing f Liden 1 borehole, ttaterial-lnhomogeneities such as gas bubbles form reflective interfaces in the fluid tank which scatters ultrasonic pulses sa a rate pulse is formed. The transmitter emits short bursts of ultrasound at a refision rate, and has multiple time-gates/time windows to receive backscattered reflections from gas bubbles. sediment particles or droplets in the relevant distance boundary Inside the production floodplain. Doppler shift in the return pulses due to the vertical velocities of the inclusions miles, and thus the quadruple flow velocity found Doppler flow force is related to the fluid velocity which

where f is the emitted frequency, c is the speed of sound in the fluid, VYer is the velocity (which is usually known at the top of the vessel drum) and Vs is the velocity of the scattering particles, both parameters with signs.

EP0442188 published 08/21/1991, withdrawn 1905, "Downhole Doppler flowmeter"

is a device for measuring the upward thrusting rate in that borehole. There is a similar scratch plate set of transmitter and receiver as for US4947B83 above, but with transmitter and receiver arranged not on the lower end but on the lateral side of the probe, please see its Fig. 1, thus measuring the anuker current past the loggaaon. In order to correct for the local borehole diameter effect on the annular stream velocity past the probe which is in the stream, and not in an annulus around any pipe, diameter measurements from a capesome device on the probe are included to correct the Doppler shift velocity to achieve the actual upward tightening height in the borehole

US-patent US3603145 pubBsertu7.09.1971 describes a method of monitoring fluids and tightening in a borehole, comprising using an underwater logging probe with an ultrasonic transducer of predetermined frequency and with a downstream and upstream acoustic receiver in known locations above and below for corn frequency shift and thereby detect upstream and downstream acoustic (sound) velocities. The difference between the upstream and downstream acoustic velocities gives a flow velocity of the fluid past the probe. The upstream and downstream sound speeds are related to flood density.

As the acoustic velocity depends on density, and in the cited US patent only the flow velocity and fluid-acoustic velocities are considered, the acoustic signals propagating through the borehole wall and through the rocks are discriminated. Thus, the document of prior art describes devices that direct the acoustic energy primarily through the (tuldwylen) In the borehole. Furthermore, the document describes dampers to reduce signal transmission through the borehole wall. The acoustic mile signals pass through the wireline to the surface. On the surface, the acoustic mile signals are read out on a surface readout unit which reads the measurements from a signature process such as barresler pi wireallne drum The acoustic paints received by the surfaceBUJJes unit are correlated with readings from a wireline* log depth disc on the surface, and recorded.

US patent $763773 describes a tool for evaluating cement seal quality in an armulus between a casing and a wellbore, comprising: - a tool body with a longitudinal axis; a first transducer mounted on the tool body and oriented perpendicular to the axis: - second and third transducers mounted on the tool body and longitudinally separated from the first transducer, where the second and third transducers have surfaces inclined to the first transducer by between approximately 8 and 27 degrees with regard to the tool axis: - fourth and fifth transducers mounted on the tool body and longitudinally separated from the fifth, second and third transducers. where then the fourth and fifth transducers have surfaces inclined towards the fifth transducer between approximately 8 and 27 degrees with respect to the work axis; - a sixth transducer mounted on the tool body and oriented perpendicular to the axis.

US patent 5031467 to Rambow describes a pulse-echo apparatus for detecting fluid noise behind an acoustically reflective structure. Its summary begins with "A method and apparatus for the detection of fruit propagation behind an acoustic reflective structure (casing) using pcls-echo techniques that do not depend on the painting of a Doppier effect." The method required in Rambow is a method for detecting flood stress behind an acoustic reflective structure using pulse echo techniques, comprising the following steps: (a) generating a high-frequency beam of acoustic energy in the form of pulses and directed towards the acoustic reflective structure from a position near the first side of the acoustic reflective structure: (b) detecting at a position near the first position acoustic reflections of two of the pulses separated by a short time interval; (0) generating and storing a pair of signature traces plotted against time that are proportional to the acoustic reflections: (d) subtraction of the pair of signal traces to produce a resulting signal difference trace, whereby essentially variations in the amplitude of the signal difference signal indicate the presence of nerve afferent fluid flow near a second side of the acoustically reflective structure on the opposite side of the first side; (e) determination of the slngaldermultirestraint of the presence of flight constriction near the second side of the acoustically reflective structure opposite the first side.

Summary of the invention

Briefly, the invention is a pulse-bellows ultrasonic production fire-tubing wlrellne method using a logging tool (0) which communicates via a wieilne file a superfete-urresnlngs unit,

- where the logging tool is equipped with an ultrasound transducer bts structure (04) which comprises one or more ultrasound transducer elements (041) for transmitting ultrasound signals, including - that the logging tool is designed to primarily operate in Doppler mile processing mode, and - in generating a digital signal where the signal represents one or more ultrasound beams/ultrasound beams (A, B), i converting the digital signals into voltage signals, connecting the voltage driver signals to one or more transformers (041), and i transmitting bellows pulses as one or more of said ultrasonic waves/ulrasound bundles (A. B) to the fluid in the tubing: and to receive ultrasonic signals,

to receive returning signals and convert to analog voltage signals, amplify voltage signals nB, convert them to digital signals ti a received digitized ultrasound signal tldtract for the ultrasound beam (A, B).

in Doppler mode, producing Doppler measurements for the point of the beams (A B), and finally sending the Doppler readings to the acquisition readout unit.

in one embodiment of the invention, the instrument is arranged to switch between a pulse pulse (PW) echo backscatter (sing.: baokscaUer) caliper mode and a Doppler mailngt mode. where, in the aforementioned PW backscatter mode, ultrasound caliper data is formed for the beams (A, B).

The invention is defined in the set of independent and independent claims attached.

Flight explanations

Fig. 1 is a world-class illustration of a portion of a completed petroleum well with a cemented casing in a borehole through overlying formations to an influx ion in a reservoir formation. An ultrasonic layering tool according to the invention is arranged inside the product assembly.

Fig. 2 is an illustration of a view through the mechanical structure of the ulbal<y>d-lo<g>gaverktB<y>et of the invention. Fig. 3 is a generalized diagram of the electronics arranged in an electronics structure frame (02) within the mechanical structure of the ultralight tool. Fig. 4a is a cross-axial section of the ultra-clearance transducer-battrestrumuren (04) with some of the transducer elements (041).

Fig. 4b is an illustration of that longitudinal section of the transducer hood-hytson (03).

Fig. 5a - d is a machine drawing of a preferred embodiment of the logging tool according to the invention.

Fig. This is a schematic view of a logging tool Helge's invention.

Fig. 5b is a longitudinal section corresponding to the diagram in Fig. So.

Fig. 5c shows an enlarged cross-section indicated by the circle in Fig. 5b.

Fig. 5d is a cross-sectional view through the line C-C in Fig. 5b.

Fig. 5e is a perepeklKres and each longitudinal section of the transducer with the ultrasound elements arranged at a nose part of the looe vessel According to oMrtintanea.

Follow 6a is a verUal section through an outer layer according to the invention, in a tubing and casing In a fire, with a first flow (Ff) that tightens upwards in the tubing and with a second fluid (F2) that tightens in the annulus space between the fire casing and the tubing (3) . Fig. 6b is an overview of the different modes of ultrasound-pulse-echo petroleum fuel tubing logging. Fig. 7a is a block diagram of the sensor, electronics, and empty communication main components of the logging tool according to the invention.

Follow 7b is an illustration of ultrasound strips A and S formed by ultrasound elements

(041). Fig. Sa: Perspective view of the laboratory experimental setup of an underwater ultrasound transmitter for Doppler measurements of a flow behind a steel plate. Fig. 8b: Side view and perspective view of the laboratory experimental setup of Fig. 8a. Follow 8c: Top perspective view of laboratory experimental setup of Flg. 8a and b, upward tension between the steel plates. Fig. Sd color Doppler diagram as seen from above, ref. Fig. Sc, gently rotated 90 degrees. Fig. 8e: Spectral-Doppler time series during the start of tightening F2. Above absoisssn: upward velocity r. Below the abscissa: downward velocities. Follow S is a vemkalsnKt through a tubing with a logging tool sell the invention with a hey databrt rate, compiled in a logging tool system that includes other logging tools that do not necessarily produce data with a hey bitrate. Follow 10a and 10b show in a little more detail the features from Fig. 9 and Roughly indicate the main components from Fig. 7a.

Fig. 11a is a diagram of a water column-water transmission coefficient.

Follow 11b is a diagram of transmission coefficient for an oil-tll-ethyl-to-water interface.

Follow 12a shows a continuous downmixing of the ln-phase and Quadrafur signals.

Follow 12b shows a downmix and dutter-filtering of the downmixed signal.

Details of embodiments of the invention

The main purpose of the present invention is to use ultrasound pulse wave Doppler measurements to detect and measure tightening in a petroleum oil such as a production well, injection well, or the like, especially tightening in a tube annulus or casing annulus. Tightening in the annulus or casing annulus can be due to leaks and is undesirable, and the present tool is capable of detecting and mitigating such flow. Another formal arultrasound-pulse-bellows-calipermil Inger of the production pipe wall in the petroleum production fire, an injection bmnn. etc. The tool according to the invention is used in the field of ultrasound-pulse-bellows-Doppler measurements (or to detect and measure the flow of fluids in the annulus that surrounds the production tube, and if possible also fluid tension rates in further annulus such as outside the casing. The Doppler measurements can be corrected for tightening within the annulus in the tubing Ooppleimilations can also be corrected for cloths due to the tool's own movement, please see below. The production fluid and annulus can be oil, water or gas or a mixture of diasa, and can contain particles such as sand, kneading or inhomogeneities. Production tube annulus and more annuli may be empty and thus only fluke-filled, and the casing annulus, if a casing is present, may be gravel-packed, or cemented, but still permeable to fluids and subject to undetected leaks. to switch between tagging to detect unwanted leaks in the fire, for ultra-iyd caliper logging and other measurements of the production casing's inner surface, wall thickness and outer surface to detect pitting / burial rust, cracks or holes or other irregularities, and to measure fluid flow velocities in the production ice annulus strainer casing annulus. Doppler measurements within the production tube can be used to correct Doppler measurements in the production annulus*. but other density measurements Inside the production tube can serve the same purpose.

Fig.1 is a very simplified vertical diagram illustration of part of a completed petroleum well with a cemented casing in a borehole through overlying formations of an Influx-sons I an reservoir formation. A first fluid (F1) tightens in the production lube and a second fluid (F2) is present in the animus space (7). One can assume that then the two "trains" have different speeds. A ullralyd-ioggevarktey Select the invention is arranged inside the production shed. Ultrasound-ioggs-verktayet Held the invention here unirulsound-transducer-carrying structure (04) with one or more simple ultrasound-transducer elements

(041). In one embodiment, one or more transducer elements (041) are covered by an ultra-clear window (05). The transducer beam structure is arranged in a lower part (013) near the lower end of that main housing (01). The support structure (04) can hold one, two, four, six strainers, ten tianduser elements, each with their eignalutsendenrje surface mainly radially outwards, please see Fig. 5a and Flg. Said prototype version. This provided the option of selecting one or more transducer templates (041) each of which was to emit an external beam beam A (and optionally its opposite beam beam B) for logging purposes. In one embodiment of the invention, the emitting surface (042) of each of the 28B transducer elements (041) is wide enough relative to the emitted wavelength that it will transmit in a straw-like manner, please see Fig. 7b, and not spherically. Each transducer element (041) of the transducer surface (042) has a width of more than 1/2 of the wavelength, which will produce a so-called atrally extending emission.

In one embodiment of the invention, the emitted ultrasonic wave frequency of putabilgtn is in the range 1 to 5 MKz, preferably around 3 MHz. Doppler measurements in particular can use up to 1 MHt

Central lasers can be arranged below the transducer array and also extend up along the main housing (01), please see Fig. 1. The ultrasound tool is designed to operate on a counted veriday bus with other logging tools E a logging tool string, please see Fig. 9, Fig. 10a and Flg. 10b. The ullrefyd tool according to the invention can produce high-density neutral sound dafa at a high bitrate, where the high bitrate exceeds the global bitrate of an ordinary tool arc that usually connects ab verUaysections with a telemeterl terver which is connected by a signal cable to a surface readout unit, and especially the telemetry bitrate on the signal cable itself, which is the most significant limiting bitrate factor. The ultrasound device according to the invention is, in a preferred embodiment, arranged to be connected to an Unsuitable high-capacity memory device section (200) connected immediately above the main housing (01). The audio tool of the present invention is designed to be controlled from the surface and send low resolution data to the surface via the counted telemetry line and the ordinary tool bus for logging, and in the preferred embodiment to use the appropriate recording tool as a buffer for the high reading data that has been produced. The acquired memory can then be interrogated from the surface readout unit for parts or

all of the hay reading data when there is available capacity on the telemetry line.

Fig. 2 is a greatly simplified illustration of a vertical section through the mechanical structure of the ultrasonic iogging tool according to the invention l an upper end (013) of the main housing (01) is a connector for the above-mentioned tools in a tool string. In a preferred embodiment of the invention, the connector has, in addition to the failed power line and the utility bus common to the utility string, also connectors for the heyhasUgheta data bus of the dedicated memory utility (200), please see Fig. 7a. in the lower part (013) of the main housing (01) there is a transducer housing housing (03) with a transverse wall (032) with a downward-pointing central shaft (034). Then the central shaft (034) serves two purposes; it forms the support tor the ultrasound transducer support structure (04) and it further supports a subsequent nose section (06) below the transducer array (04). In one embodiment of the invention, an ultrasound-transparent window hyphae (05) encloses the transducer support structure (04) and is held in place between the outer portion of the tranaduser cap sleeve (03) and the nose portion (06), and is attached to the tranaduser cap sleeve (03) by a upper locking ring (062) and remove the nose part (OS) from the lower locking ring (061). The lens (061) has a diameter that is slightly larger than the largest diameter of the ultrasound window (05) or the transducer support structure (04) (if it is without a window) in order to reduce the amount of mechanical wear on the transparent window or transducers. Furthermore, the clearance (061) is chamfered radii) so as not to block ultra-high frequency pigeons passing radially and approximately 17 ti) 25 degrees down from the transverse plane of the sensor. inside In the main house, the electronics for the urtraphy tool are housed.

Follow 3 is a generalized outline of the electronics arranged in a structural structure frame (02) within the mechanical structure of the ultrasonic tool. From the bottom end, it is illustrated that the audio transducer array (04) with its amplifiers (041) is connected via a number of cables (0252). The cables extend through one or more passages (0253) through the transverse wall (032) up to a probe interface module (025). The probe interface module (02S) is further connected to a sensor module (024) which is further connected to a transmitter/receiver module (023), which in turn is connected to a processing module (022). An energy module (021) supplies the modules that require energy. When the electronic modules, in an embodiment with the modules arranged on their own card, have been assembled in the eieMroniMc structural frame (02), the structural frame (02) is pushed into the main housing (01) from the lower end (013), where the flexpirnt cables are threaded through the passages (0341) in the transverse wall (032) and connect the probe interface board (025) to the transducer array (04), and the transducer housing housing (03) is screwed into the lower end of the main housing ( 01). The tool is closed and pressed when the ultrasonic window (05) and the nose part (06) are mounted on the central shaft (034) and unloaded from the lisings (061,062). In one embodiment of the invention, the transducer array is constructed in such a way that it has a liquid-tight, pressure-tight conical which includes the transducer surfaces (042) and the conical ultra-transparent window (OS) can be dispensed with.

Follow 4a is a rough sketch of a cross-axial section of the ultrasonic transducer support structure (04) with some of its transducer elements (041),

Follow 4b is a rough projection of a longitudinal section of the transducer housing cabin (03) with its cable passage (02S2) through the transverse wall (032) which carries the downwardly projecting central shaft (034) to support the transducer support structure (04) and the nose portion (06).

Follow Sa - d is a machine drawing of a preferred embodiment of the logging tool according to the invention, i.e. which shows the mechanical structure of the tool I an viss detsQ.

Follow Here is a side view of a bending tool according to the invention, with a socket wrench in the main body (01) near the upper end (011) and a removable protective power cap covering the connector plug (012) which should preferably be connected to the appropriate tool (02) ). At the lower end (013) of the main housing (01), the transducer housing sleeve (03) is arranged with the ultrasound-transparent window (OS) and the nose part (OB), ada list with shavings. The cowl sleeve (03) and the nose part *OS) are equipped with fixed knuckle grooves for assembly and disassembly. A protective terminal hylae that can be folded away is also shown. The protective hood is removed and the tool is equipped with a centralizer for lowering the color in the fire to keep the tool centric in the production tubing when logging. This can limit the time windows required and simplify call periogging with the ultrasound window. and also simplify the ultrasound logging of tubing wall thicknesses and tubing wall thicknesses, and further simplify the Doppler measurements of particle or fluid velocity through the wall.

Fig. Sb is a longitudinal section corresponding to the diagram in Fig. Sa. From the bottom end, the ultrasonic transducer array carrier (04) is illustrated with its output transducer elements (041) connected via cables (0252) extending through passages

(0341) through the transversal wall (032) up to a probe interface module (025) in the electron beam frame (024, further connected to a transmitter/receiver module

(023) which is digital - to - analog In the transmitter direction and analog - to - digital in the receiver direction. The T/R AD/DA converter module (023) is further connected to a processing module (022). An energy module (021) supplies the modules that require energy, e.g. not the probei)resensnrH module. Here are the electronic modules in their assembled state The electronics base frame (02) is wedged into place in the main housing (01) from the lower end (013) and slid into place by the transducer housing bracket (03) which is screwed into the lower end of the main housing

(01). The tool is closed and pressure-tight with the ultrasonic transducer window (05) (or with a correspondingly closed transducer carrier structure (04)) and the nose part (06) is mounted on the central shaft (034) and list of the Bearings (061,062). An advantage of the present assembly is the fact that the ultrasound-transparent window (05) can be easily replaced by an operator on site without disturbing the ultrasound-bearing structure (04). Furthermore, the ultrasonic transducer base structure I ssg itself is easily accessible for replacement, with or without any window (05). At the upper end of the main housing (01) the connector plug (021) is shown which is for the above following tool, preferably the dedicated mini tool (200).

Follow 5c shows an enlarged cross-section indicated by the circle in Fig. 5b, with details of threads, O-rings, and relative positions of inward-facing and outward-facing threads in the threaded components at the lower end (013). Note that the upper lising (062) aligns with the outer diameter of the main housing (01) and the largest diameter of the ultra-transparent window (05) and the lower lising (061).

The central bolt (034) is massive in the illustrated design. In an embodiment of the invention where the ultrasonic logging device is arranged to Not be arranged as the bottom of the logging tools in the tool string. In such an embodiment, the nose part is replaced with a connector sleeve for continuous electrical connections that pass from through the central side (034).

Fig. Sd is a cross-sectional view along the line C-C in Fig. Sb, through the circular travertine wall (032) just above the radial core structure. The section is shown so that one looks down in the direction of the lower end (013) of the main housing. From the center outwards, the section shows the central bore (034) on the circular transverse wall

(032). with one or more, here a number of six holes (0331) with a tar array (033) holding pins (0332) extending from the Inner rear part of the transducer carrier structure (04) as shown in Fig. 4b. In one embodiment of the invention, this spring array yields upwards in the axial direction when the transducer support structure (04) is moved by the compressed acoustic window (05) due to their mutual interface, when it is subject to increasing pressure in the fire, which prevents deformation or mechanical damage to the transducer. Radially outside the fjserarray holes are the through holes (0341) through the circular transverse wall (032) for the cables (0252). Radially outside this circular transverse wall, it continues into the cylindrical part of the transducer housing (03), followed by a gasket groove, the upper part of the transducer window (05), and finally the lower part of the locking ring (062).

Follow So is the host through an irritation direction only according to the invention, in a tubing and casing in a well, with a first fluid (F1) that flows upwards in the tubing and with a second flow (F2) that flows in the annulus space between the well casing and the tubing (3). The transducer surface (042) is arranged with an angle (V042) with the tool axis preferably parallel to the tubing axis. This ensures that you avoid a directly reflected radiation signal that could otherwise saturate the reception when you are in receiver mode, you use backscattered p waves that propagate through the fluid (F1). - Caliper tracking: On the right side of the axis shown in Fig. 6a, pulse-echo caliper tracking of the radial distance Ul the inner fiibing wall is shown. Caliperiogging can be done with diametrically opposite pairs of transducers 041A and 041B, which can be selected via the electronic switch board (024) regulated by beamlbrmer I switch control board (0239), please see Fig. 7a below, separately or simultaneously. - Logging of the inner wall of the tubing: Pulse-echo-milings of the inner wall are carried out in the same signal mode as choosing the same propagation mode and time window until after the first backcattered longitudinally propagating ultrasound beam that represents the tubing wall. Logging of the inner surface of the tubing wall can be used to search for tubing collars. valves, Openings in the fublng wall, etc, Backscatter logglng can also be used to cause or unwanted deposits of tar, scaling. grave rust, cracks, holes and potential sources of leakage.

- Measurements on the outer surface of the tubing wall can be carried out on signals that have propagated through the tubing wall as p- or s-waves and reflected or

backscattered through the tubing wall and back to the tranadus elements (041). In order to distinguish between the desired signals from the outer surface from the backscattered and reflected signals from the inner surface of the tubular cradle, time window processing of the returning ultrasound signals can be carried out with the aim of not carrying out unnecessary data collection and processing. This technique is generally used in the present invention to select an appropriate subsecting depth, and can be controlled by an operator on the surface reading unit. In the illustration, there are visible signs of erosion in the outward-facing tubing cradle.

- Dual education

- Tubing internal Doppler measurements can be performed to measure fluid flow past the transducer array (04) in the tuning to correct annulus flow Doppler measurements. - Tubing interior colour-Dopter measurements can be carried out to distinguish between particles (sand, rust or other debris) or droplets (of water, oil or gas in one of the opposite phrases) that enter the tubing through leaks. - Annulus flow can be detected and even measured based on ultrasound signals that have followed the following path: p-waves emitted in the tubing flight, pass as s-waves through the tubing wall, propagate as p-waves through the annulus fluid, are reflected and Doppler frequency-shifted by the droplet kneads the particle, returns an acoustic signal as an s-wave through the tubing wall, and arrives at the transducer as a p-wave. For water to style, an optimal angle of incidence is 17 degrees, and for typical ofje to steel, a good angle of incidence is between 13 and 21 degrees

(also depends on tightness). please see Flg. 11b which is a diagram of the transmission coefficient tor an oil-ttt-steel-tll-water interface. For S-waves, there is more than 1% transmission between 15 degrees and 27 degrees, with more than 2% transmission in the range 15.5 to 28.5 degrees. In one embodiment, the currently preferred angle for the conical transducer angle in the common goods signature transition range is between 15.5 and 21 degrees which would also be appropriate for oil-steel-water interfaces. - Atvtulus flow can also be measured and imaged using so-called ultrasound color Doppler decoupling, which measures the velocity field behind the tubing wall of Individual volume elements of the annulus fluid (F2), please see Figures 8a, b, c, d. Furthermore, it is in Flg. See shown a Spectral-Doppler series; above the abscissa there are incoming or upstream flow length values up to 24 cm/s, and below the abscissa there are negative values from -12 cm/s. One can see the beginning of tightening, here Injected air bubbles In an upward-flowing water stream. The Oe detected values for each instant range from around 2 cm/s to over 15 rev/s, and also with some negative velocity values. Fig. 6b is an overhead view of the different modes of ultrasound-pulse-echo petroleum well tubing logging. The relevant logging mode can be selected via the live controller card (0220) In the logging tool, please see Fig. 7a, controlled via the telemetry from the surface detection unit and the logging operator. Fig. 7a is a block diagram of the sensor, the electronics and the main communication component of the logging tool according to the invention. As all control, communication and data signals are digital, and all ultrasound signals are acoustic and analogue, transducer selection, signal transmission and reception, amplification and branch propagation and processing must be performed at an appropriate stage to achieve meaningful results.

Follow Tb is an illustration of ultrasound beams A and B formed by ultrasound elements (W1). and in one case they are mounted on a support bracket (04).

Before the log operation starts, the uKralydlrjggewrktjøyat according to the invention is salted

■together to form part of a logging tool string and connected by a cable for energy and telemetry to the surface readout unit.

With reference to Flg. 7 a bir the operation of the tool outlined here.

Mode choice

- The operator on the surface selects on a surface detection unit (SRO) which operating mode the logging tool according to the invention shall use, either imaging / caliper logging mode or Ooppler logging mode. Regulation signals that are sent via the tool bus to the tool bus circuit board (02201) which sends the command to the main controller board (0220).

General ultrasound signal transmission and collection according to the invention

- For both imaging and Doppler modes, select the signal/flow controller board

(0238) which of the one or more transducer elements (041) should emit the ultrasound beam (A) and the beam (B). One or more of the wool radio elements (041) are selected to send out the beam (A), and (B, C, D,...) if more elements are used.

The elements can be 180 degrees apart in azimuth, or less if several elements are implemented. - The signal controller / switch control box (0239) sends ro commands for transmitting / sending:

Transmlttar selection

1) a control signal down three svHsJkortet to connect the required

transmitter channel to connect the analog output signal, from a transmitter driver (0233) (described below) to any Md selected ultrasonic transducer elements (041) to form the strip (A) (and also (B, C,

O,...)).

In one embodiment of the invention, no beam is required if single-transducer elements are used.

2) a control signal to send the Tx<*>beamfbrmer module (0235) which shapes

the digital signals that are to be converted further down in the process into an ultrasound acoustic signal that is to be transmitted from the ultrasound transducer element

(041), please see Flg. 7c below.

Due to internal symmetry in each emitted beam (A) and also in the beam (Et), it is only required to form the signal curve for te or flare transducer elements

(041), and also to use the same signals for corresponding elements (beam (A) and beam (8, C,...). - The Tx-signaVormer module (0235) forwards its calculated, digital signal Ul a dlgitaMII analogue -converter with amplifier in Tx driver /PA (0233) In an embodiment of the invention, the amplifier generates an analog transmitter signal for the Iraneduser element (041) In a range of 100 Volts.

Digital signals VI analog signals

- The analogue signals are sent from the corresponding Tx driver / power amplifier

(0233) via transmitter / receiver control switches (0232) to the circuit board (024) which connects the analog signals to the selected transducer elements (041). Due to beam transmission symmetry, each of the amplified analog signals can in one embodiment be forwarded Hl to uMtalvd transducer element Br (041) with the same relative positions o the center line selected for each beam A and B. It is assumed that acoustic signals I rays (A) and (B) will not interfere.

Analog signals to the transducer elements (041)

- The analog Tx signals are sent out from the switch board (024) via the probe branch unit board (025>) through the cables (02S2), where each conductor is connected to a single transducer element (041), which converts the analog voltage signal into an ultrasound signal. The returning signals, whether they have been bluntly reflected or stbakeepred, then come back to a beige front to the same tranduser element (041) which returns rays corresponding to steels (bundles (A) and (B), if several transmltier elements (041) have been used.

Broadcasting of signals.

- The ultrasound signals from A and perhaps B of selected transducer elements (041) propagate saw like an acoustic front, and similar to the signal trains Illustrated in Fig. 7c, out through the ultrasound trasparerrla window (05), forming a p-bete In it surrounding feisty fluid (F1). and is partially reflected or backscattered from the inner surface of the tuning. A proportion of the acoustic energy of the acoustic signal is transmitted through the stilt wall, depending on densities and angles of incidence. As explained above for a water-still-water transmission coefficient, please see Fig. f 1a, see a value of 17 degrees angle of incidence for the p-osigen to propagate well as an s-wave e-e ne rgi through bide water-steel-water- and oil-steel-water interfaces. For angles of incidence below 14.5 and 12.3 degrees respectively, very little s-stream energy will be transmitted through the stile wall.

Returning signals

- URrasound signals that have passed the tubing cradle will propagate as p-a-p books and car reflected from Inhomogeneities 1 the annulus wash and are reflected back using the same p-s-p mechanism and come back as a Wen proportion of the original signal, as a p-wave throne to the same group of 2x2" consecutive transducer elements (041).

Reception of acoustic signals

- At the time of reception of the acoustic signals by the group of 2x2" consecutive transducersntsr (041), they must be put In a reception - "Rx" mode. The two groups A and B transmit in unison, but they do not represent the same measurement , say the two received signals (beam bundles) A and B must be processed separately when operating in receiver "Rx<*->mode.

□the acoustic ultrasound signal received by the two counts (A) and (B) with transducer elements (041) does not need to be "received" in order to focus on a single point in a step before being further processed. In the according to the present invention, this "beamforming" (or beam front selection) is performed in the Rx operator module (0237), please see Fig. 7a.

Analog to digital signals

- The analog voltage signals from the transducer elements (041) in each group A and B are separately connected through the Tx / Rx switch, analog signal channels from line A, and analog channels Ira line B, and sent to the analog to digital

"Analog front end" fbrrbrsterkariwtet (0234) (dr to be amplified, please see Fig. 7e, ag si digitized, The amplification is in an embodiment of the invention a variable gain amplification with different gain for pre-tube wall trlback scattering algnats and post-ra rvsggs signals received, please see below.

Rx Dtgltalization

* The signals from strip A and strip B are sent on to the Rx digitizing module (0237) for separate digitization.

• Bide for cafiper • and Doppler noodle, select beamfoimer In the switch control module

(0239) which r of the transducer elements (041) are used for strile (A) and strile (B).

Analogue to digital signals

- The analog voltage signals from the transducer elements (041) t strips A and B are connected through the Tx / Rx switch, and sent to the analog-to-digital analog front-end preamplifier (0234) to be bit amplified, please see Fig. 7a, possibly with a variable controlled gain, and digitized.

For pulse bellows - Doubler terms, bid Tx and Rx are repeated for the same stream A and/or B to give a speed estimate over a given time span.

The steps above are repeated for each depth of investigation, for one depth level in the fire, for the transducer elements. Sidede, a pixel height of a vertical line image is obtained for a strip A, and two or more strips (B, C, D,...} azimuthally, i.e. around the periphery around the Irsnsduaerbærestruktumn (04), depending on whether the number of transducers is 1 . 2-D image of the surroundings at each depth The vertical dimension of the log is determined by the log depth register results on the surface log or another depth indicator tor the log tool Stgnalproiesserlng, fahrfng and transfer

- When received, the beam-shaped signals are processed in signal processing units (022) which demodulate (0223) the signals, form envelopes (0225) of the ultrasound signals and quantize

(0227) then demodulates the signals and puts dam In a callpertogg. The

The quantized measurements are overtart from the main controller card (0220) to be compiled into the log, which data is in a preferred embodiment to be transferred via a memory controller card (02202) to a high-quality bus, to a memory tool (200) described above.

Fig. 8a illustrates a perspective view of an experimental set-up in a water tank, where a bansudser scanner head is immersed in the tank at a distance from a steel plate and directed with a 17 degree angle of incidence towards the plate, and in which a slow water flow is set up behind the steel plate. There is a second steel plate arranged behind the main one.

The water and the steel components can be compared from left to right with tubing-irttemt fluid F1, here water; the tubing cradle; annulue-fluldat F2, has water, and the casing wall.

Fig. 8a: Perspective view of laboratory experimental setup of underwater ultrasound transmission for Doppler measurements of a flow behind a steel plate.

Follow 8b is that vertical section of the same.

Follow 8b: Side view and perspective view of the laboratory-experimented layout of Flg. 8a.

Fig. Sc shows 1 a diagram corresponding to Fig, 8b, a Doppier measurement resulting from the set-up in Figures Se and Sb, where bubbles have been introduced into the water stream.

Follow Sc: Top-perpettfvifs* of laboratory experimental set-up of Fig. 8a and b, upward flow between the steel plates.

Fig. 8d shows, in a similar top-pair aspect compared to Fig. 8c and rotated SO degrees, a Doppler image measurement setup of an upward stream of water with bubbles introduced as illustrated in Figs. 8a, b, and c. A region of interest, (eng. ROI) is indicated in the direction of the ray (A) extending from a front of

the clock sound transducer (041).

Follow Sd colour-Doppler view as seen from above, ref. Fig. Sc, image rotated 90 degrees.

Fig. See is an illustration of a spectral Doppler time series of the same experimental setup as illustrated in Fig. 8a and Sb. Above the abscissa are feeding or upflowing values up to 24 cm/s, and below the abscissa are negative values from -12 cm/s. You can clearly see the beginning of tightening, here Injected air bubbles in an upward flowing water stream. Oa detected values at each moment range from about 2 cm/s to over IS cm/s, and also some negative velocity values. Fig. 8e: Spectral-DoubleMlds series during start-up of flow F2. Above the abscissa: upward velocities. Below the abscissa: downward velocities. Fig. 9 is a vertical section through an tubing with a bggever device According to the invention with a high data brt rate, compile in a logging tool string that includes other logging tools that do not necessarily produce data with a high bit rate. The logging tool according to the invention is combined with a dedicated memory tool section (200) arranged just above the upper end of the ultrasound tool (0), with the high data bit rate LVOS bus to the high speed and high capacity memory tool

(200) memory section, which is also connected to the ordinary tool bush (10) in the tool string. In one embodiment, the logging tool according to the invention is directly connected to the tool bus (10) and communicates its measurements directly to the surface reading unit if the produced data rate does not exceed the measured data rate.

Follow 6; High-resolution tool connected with a dedicated memory/buffer tool and with telemetry communication to the surface.

Fig. 10a and 10b show in a little more detail the features from Fig. 9 and roughly indicate the main components from Fig. Take, such as an ultrasonic transducer support structure (4) with ultrasonic transducers (041), a number of conductors Hl prelimiter module (02S), switch module (024), Tx/Rx ADC module (023), Tx/Rx signal module (0235, 0237 ), signeHormer / switching control board (0239) (which sends control signals to the switching module (024), usually see Fig. 7a).

Fig. 10a: Lower part of an embodiment showing the mlnrie tool and the high-speed ultrasound tool,

Flg.10b: Generalized logging tool with communication to the surface via the signal cable and with one or more hay data volume producing hosts, each of which is connected to a mlnne tool.

The mechanical structure of the equipment

The invention is a petroieum production burner ultrasonic puff bellows backscattedoggings and Doppler mode annulus fluldloggeverktay (0). for use in a production tubing (3) which directs a first tubing constriction (30) of a first fluid (F1) and enclosed by that fubing annulus space (7) with annulus flights (F2) in a r^troleum production furnace (100). The log probe (0) If the invention includes

- a water-tight cylindrical main housing (01) with an axis (010) with a lower end (013) and an upper end (011) and equipped with an energy and heat conductor (012), - where the main housing (01) has the electronics modules described above in a structural frame (02), - Where the lower end (013) comprises a transducer housing sleeve (03) with a circular transverse cradle (032) with an axially directed spring array (033) for clamping the transducer support structure (04). preferably mounted on a central shaft (034), against the inner conical surface of an ultrasound window (OS) which is held by a nose parfJ (06). The spring array (033) will allow movement of the transducer structure (04) as the fire pressure compresses the conical window (05) while the spring array (033) will maintain contact with the transducer surface (042). This is important in order to maintain the desired emitted ultrasound output shape and in order to maintain the desired emitted and received energy.

Lasers (061,062) which are internally threaded and arranged from the nose part (06) and the transducer housing (03) directions respectively, secure the lower and upper shaft-aligned lift parts of the sound-proofing window (05). The outer diameter of the locking rings (061) and (062) then corresponds to the largest diameter of the main housing (01 ) < The cross-section of the lower locking ring (062) is triangular and chamfered in order not to block outgoing and incoming ultrasound waves. An advantage of the mechanical structure is the easily replaceable nosepiece (06) and the ultra-clear transparent window (05), and the ultrasonic base rest structure (04) respectively, which are available in that order in the lower part (013) of the tool.

Overview of the invention:

To summarize, the apparatus according to the invention can be used for two main purposes: I) Pulse bending (PW) Doppler measurements of flow velocity for fluids in the annulus of a well, in the tubing annulus, and possibly in further annulus, such as in the liner annulus or casing annulus.

II) Urtral<y>d-<p>ulsbøl<g>elog<g>ing of an inner wall of a tubing (ellar line) t a petroleum fire.

Pubbøtge-tllbacksprednings (eng.: baekscattørj-scann and Pulsbøige (PW> Doppler measurements are connected to wimline depth encoder measurements and ken compiled into corresponding logs. An operator can measure a perforated production part of a fire to form a layer of the location and geometry of the the perforations that have been made. Next, the operator can set the instrument to run in PW Doppler mode to measure strain rates in the area of the perforations that have been detected and imaged. The two operations can be performed alternately. The combined imaging and measurements can provide valuable information about production conditions. the perforated part of the well.

The imaging is carried out in vertical scans with beams A and B of combined transmitter / receiver sequences as described above. The time slots are selected to collect a selected probe depth.

Doppler measurements

The pulsed bending (PW)-Doppler measurements of the fluid can now be carried out in a selected part of the well, in the production line itself for the correction of velocities, but especially in an annulus, and depends on the time wave selected by the operator. The transducer angle ((V042) allows us to utilize the transmission efficiency of the chosen vane frame which gives good s-back transmission, which in turn allows the detection of Doppler signs due to particle or bubble velocities in the annulus, e.g. behind the tubing wall.

A Pulsed Wave (PW) Doppler data acquisition may require a number of consecutive

put broadcasts In the same direction to detect movement, e.g. a number of 18 put dispatches. A PW-Doppter measurement and a PW-backscatter (sing.: backscatter) - measurement can be sent to the main controller module to allow bubbles and particles in an azimuthal direction to move over a significant distance below then e.g. 18 the transmission and anti-reduction cycles, in order to measure their speeds, and that the bubbles over the entire survey area (eng.: range of interest or ROI) should be mapped in the desired depth ranges. The main controller module (0238) can also command jet overflow while switching back and forth between PW Hlbackscatter mode and PW Dopplannodue in order to build up a so-called backscattenog of the inner ablation which is overlapped by annulus flow thickness estimates. The transducer angle used in the present invention is not only to allow sound transmission through the tubing wall to perform measurements in the annulus of the tubing, but also to advantage in avoiding direct reflection from the tube wall, as directly reflected signals contain far more energy than backscattered (signals) (eng .: backscattering). Direct reflections would have saturated the receiving transducers' amplifiers if they had been set 11 in the detector post-tubing signal series. (0234) use a pre- and post-tubing gain function where the distinction between pre- and post-tubing two-way travel times can be derived during imaging mode while performing backscatter imaging of the tubing wall, or use plaster measurements during PvV-Oppler measurements.

A PW-doppler assessment performed in the Doppler processing unit 022D, please see Fig. 7a. The PW-Ooppier process requires significantly more data to perform an Annukis hazard estimate than pula echo imaging of the tubing wall. This is because each pool propagates all the way from the tmnsducer surface to the sampling volume at the desired distance and back until a new trawl can be sent. If it takes too long between each time a beam is sent in a certain direction VU so-called 'aliasing* occur.

The fluid velocities had to be corrected for the vertical velocity of the tool itself. Irregular movements of the tool can form reflections which can be attenuated by using a so-called durter filter, please see below. The Ciutter filter is a high-pass filter as illustrated in Fig. 12b. A number of different tweeters with different cutoff frequencies could be implemented in the Doppler processing unit (022D) and could be selected from a bank of tilters depending on the detected instrument velocity relative to the tubing wave among other parameters.

Bedding color

Flow color imaging is performed using a multi-area pulse bender (PWy) Doubles multiple sampling volumes per region exposed to measurements, per region of interest (ROI) in the annulus, for each beam. The average frequencies can be color-coded for direction, speed, bandwidth and signal power Power and average frequency are estimated via aulocorrelation of I-phase and quadrature (Q) numbers:

where k is the Doppler sample number and Ner the number of samples in the estimate, i.e. >= 16 for color Doppler = packet size. For mukj-range Doppler, z(k. I) is used where k is the pulse and i is the sample in the pulse.

Hast error estimates can be formed from a normalized frequency estimator:

where RN is the autocorrelation function formed with a shift pi Xw(1), of the complex-modulated pulse number N, i.e. a vector with all samples from the region

of Interest / sample vote and mw is an average frequency in radians, where the average frequency is. The number of samples used in the correlation (N) is the number of samples to be averaged over the estimation of an average angular frequency.

The signal power estimate can be made from an average signal strength estimator as above.

For the flow color packet analysis, the number of pulses to form a velocity vector was kept silent in order to achieve an acceptable time resolution. For PW-Dopper this is not critical as only one street direction is used and rent samplers can be used for filtering. For PW-Doppler, a Doppler frequency spectrum is estimated and not just the average frequency as is the case for strain color.

Adaptive filter filtering

When moving a logging tool at a constant speed in the fire, or if the logging tool is subject to some residual movement due to bellows in the busser cable, the backscattering from the pipe wall will have a strong, low-frequency contribution to the Doppiempekterat due to the movement . Because the wall backscanner signal is relatively strong compared to the flight voltage we mask the voltage signals. In the Doppier processing module (022D), one can in one embodiment be Implemented with an over-folding algorithm that is continuous (which is particularly important if the tool movement is uneven in relation to the tube wall) with an adjustable clock smoothing window and an update rate for average transmission frequency estimates that performs the following clustering: Downmixing of the Doppler signal with the average frequency mn which can be estimated in the equation above, see Fig. 12a, where the center frequency for tubing wall backscatter will thus be brought Hl nsar 0 Hz, please see "downmixed spectrum" in Fig. 12b. The Doppler signal from the tubing cradle is thus maximally attenuated by a high-pass dither filter, most commonly see "filtered downmixed spectrum". After the filtering, the Oppier signal can be mixed back to its original frequency, as shown in Fig. 12b, please see "upmixed resulting spectrum". The mixed signal is far less dominated by the low-frequency motion-induced hum. Application of this procedure will allow obtaining a Doppler signal of the ds weak reflections that have passed through the tubing wall representing bubbles, particles or inhomogeneities moving in the annulus of the tuning,

Advantages of the invention

A significant advantage of the device according to the invention is that you can achieve focused Doppler measurements through the tubing cradle, waste movements. The Doppler annulus measurements can be low-pass filtered to correct for instrument deviations. You can switch between backecatter practice mode and Doppter mode, which is both carried out and regulated by software in the tool itself, using control software from the surface. The apparatus is materially the same for the two modes. This means that one can run many passes in imaging and Doppler mode without having to pull the tool up from the fire between the two modes. What we! also allow combining the two modes In a common user branch section on the surface. The tool according to the invention can be used tor Doppler measurements of fluid flows through the tubing wall In addition to reducing direct reflections from the inner surface of the tubing, which would otherwise drown out the Doppler signal. Doppler processing and filtering help to enhance the weak Doppler signals to allow annulus velocity measurements.

Claims (8)

1. Method tor wlreline logging of a production abmnn by means of plaster wave ultrasound comprising - arranging a logging tool (0) in the pipe, where the logging tool (0) communicates over a tool bus (10) and a downhole* telernetrimodern via an vrireline tii a ovarftate-UDeslngs-enhsf, wherein the logging tool is equipped with one, two or more radially directed ukrafyd transducer elements (041) with transducer surfaces (042) having an inclined transmrtter surface (043) which sands out at an angle relative to the instrument axis to have an angle of incidence on the pipe wall, - operation of the logging tool In a Doppler measurement mode, for a series of pulse-bending ultrasound transmission and reception towards a focused point using one or more of the ultrasound transducer elements (041), - where the emission of ultraviolet wave pulses occurs as an ultrasound wave (A, B, C,...) in an ether several directions, where the direction is orthogonal to the inclined surface (043) and which propagates to a surrounding well fluid in r the ear, - where the reception, comprises analog to digital conversion of returning ultrasound signals representing the beam (A) and as here two-way travel times representing signals that have passed through the wall of the tube, and formation of a signal-enveloping curve of a thus demodulated , digitized signature signal for streak (A), - using a series of the demodulated digitized signal - the time series to form Doppler measurement data for said streak (A B, C,...) and - to calculate, based on said Doppler measurement data , annulus fluid velocities based on two-way travel times representing signals that have passed through the wall of the pipe, - to send all or parts of the Doppter data or velocities thus formed on the tool bus (10) over the relay to the surface reading unit, characterized by- where, during the execution of Doppler measurements, an average, relatively low speed of Doppler data representing a relatively low tool speed is calculated, and the average, low speed is used to perform clutter filtering in distant Doppler data which represents the relatively low tool speed, and process the Untried Doppler data to obtain Doppler data that has its cause in the flight constriction. 2. The procedure according to requirement 1. - to send out ultrasound bellows, - generation of digital signals, to represent the ultrasound radiation (A, B. C,..), - convert the digital signals into voltage control signals, - connect the voltage - the driver signals to the said transducer elements (041), - to transmit ultrasound bellows pulses as the output string (A, B, C, ...) in said one or more directions, where each string is orthogonal to said transmitting surface ( 043), to the surrounding fire fluid in the pipe. 3. The method According to claim 1 or 2, - for receiving ultrasound waves, - in receiving and converting returning ultrasound signals to analog voltage signals In the transducer element that represents then the said strip (A), in amplifying the aforementioned analog voltage signals, i converting the received analog voltage signals into received digital signals into a received digitized ultrasound sigrtal time series for the said" ultrasound beam (A), - demodulating the said received" digitized signal series tor the beam (A), - forming a signal envelope curve of the aforementioned digitized stgnal time series tor snilen (A). 4. The method according to claims 1, 2 or 3, wherein said one or more ultrasound transducer elements (041) with their Iransducer surfaces (042) have an inclined transmitting/receiving surface" (043) with an inclination angle pi between 12 and 28 degrees with the axis of the tool. 5. The method according to claims 1-4, with the transfer of all of the aforementioned ultra-clear Doppler data via a high-speed data bus tor temporary storage to a dedicated downhole data tool (200) connected to the logging tool. 6. The method according to claims 1 - 5, wherein the Doppler readings comprise fluid velocity, fluid strain correction, signal effect, or strain velocity spectra. 7. The method according to any one of claims 1 - 8, wherein equipment amplification of the number (n) of signals in the channels of said receiver-analog front-end amplifier (0234) is carried out for two-way travel times representing father and after backscattering from an inner cradle of the weird. 8. The method according to any one of claims 1-7, using a main controller module (0220) with a signal generator/switch control module (0239), control and signal generator module (0235) and a transmitter switch module (024) for controlling and switching between transmission and reception of ultrasound signals, and for controlling a signal generator in said transmitter signal generator module (0235) to generate said signals the digital signals representing the pulsed ultrasound beam (A), and convert the digital signals to an analog transmitter-drver amplifier in a transmitter-drver module (0233) to form the spsnnhgs driver eignals, then pass said voltage driver signals via transmitter/receiver switch (0232) to said transducer switch module (023), where the transducer switch module (024) connects voltage driver signal channels to transducer element (041). 9. The method according to claim 8, for switching and coupling, using the IR-switching module (024), said transducer elements (041) a receiver-analog front-end amplifier (0234) representing said individual beam (A) to amplify said received analog voltage signals, sending the amplified signals for digital conversion Ul an ultrasound signal time series before said ultrasound laser (A), for the beam (A), using a ergnal processing unit (022) for in-taee and quadrature dorroduiering rnodul (0221) to demodulate said slgnal time serf. 10. The method according to claim S ■ 9, using the main control module (0220) to switch between a PW (pulse bending) - backscatter inheritance processing mode t the signal processing module (022) and a Doppler target input processing mode* i ert Doppler processing module (022D). 11. The method According to claims 9-10, where in said processing module (022) comprises a signal-surrounding-curve-former-module (0225) for 1 lady an skjriat-omh<y>tnln<gs>-curve for the said In-quadrature demodulated data, and a quantizer (0227) Arranged to send quantized ultrasound waves to the main control module (0220). 12. The method according to claim 11 where demodulated digital signal series are temporarily stored in a Doppler buffer in the Doppler processing module (022D) and Doppler processing is performed in a PW (pulse bending) evaluation module. 13. The method according to any one of claims 1-12, where, in the process of duttering, a down-sampling of the said Doppler data is carried out with the average, relatively low speed, so that a frequency spectrum of the down-sampled dala Ut near zero frequency, and high-pass filters the data to remove the contribution of Doppler data representing relatively low velocity. 14. The method according to any one of claims 1-13, comprising performing Doppler processing for time spans representing two-weight travel times of transmissions from the transducer interface (042), through the fluid in the tube at the selected angle, as shear bellows through the tube -wall, and through the annulus fluid to inhomogeneous regions in the annulus fluid. in order to thereby obtain Doppler wave data for the annufus-flukJet. 15. The method according to any one of claims 1-14, comprising delaying between successive pulse transmissions to allow sufficient movement or inhomogeneity of the fluid in the pipe or in said pipe annulus to occur between successive pulses -pulses returning from the assumed same Inhomogeneity. 16. The procedure According to requirements 8 • 15, comprising transferring calculated Doppter mLedates to the head control module (0220) in Doppler mode. 17. The method according to any one of claims 1 • 16, wherein a Doppler measurement of zero stress in the annulus of the tube is corrected for a velocity measurement inside the tube, such as a Doppler miling. 18. The method according to any one of claims 1-17, comprising 4 performing pulse-wave backscatter imaging processing for time spans representing two-way travel times for transmissions from the transducer surface (042), through the fluid in the tube at the desired angle, which shears bellows through the pipe wall, and to objects or features on the outer surface of the pipe wall or through the annulus fluid to objects outside the pipe wall, thereby obtaining image point measurements of said objects. 19. The method according to any one of claims 7-18, comprising that in order to avoid saturation there is an analog gain algorithm in the receiver analog front-end preamplifier (0234) which uses a front wall and a rear tube wall gain function. 20. The method according to claim 19. where the distinction between forward and rear wall two-way travel time is based on an automatic re-detection algorithm, where the two-way travel time can be deduced during imaging mode while performing backscatter imaging of the pipe wall, or using pulse measurements during PW (pulse bending) Doppler measurements*. 21. Tool warp line logging using a pulse wave untratydl production fuel tube, comprising: a cylindrical press-fit main housing (01) with a connector at its upper end (011) for communicating over a tool bus (10) and a downhole telemetry modem via a wlreline to an overlay readout unit, characterized in that - the pressurized main housing (01) is equipped with - an ultrasound transducer housing hylae (03) -part with an ultrasound transducer support structure (04) comprising an area (m) of radially directed ultrasound transducer elements (041) with their transducer surfaces (042) to transmit ultrasound energy II an ambient combustion fuel l retted, with a scree Angle of incidence with the pipe wall, - a main control module (0220) arranged for selective switching between a PW echo-tox-scatter-wblldnlngs pre-processing mode in an analog pre-processing module (022) and a for an series of pulsed ultrasound - transmissions, and ultrasound receptions In the outtratyd tranadussr elements (041), - for transmission of wool Rasound wave pulses as one or more ultrasound beams (A. 8. C....) In directions perpendicular to the stepped surfaces (042A. 042B,...) of a surrounding combustion fluid in the tube, and - for reception, an analogue-tri-digital conversion unit which returns ultrasound signals representing the one or more strips (A, B,.,.), and arranged to form a signal conversion curve of then demodulated, digitized signal SDS rows tor each of the strips (A) and (B), - where signal processing- the device (022) is arranged so that the in-phase and quadrature demodulation module (0221) demodulates the new signal time series, - where the control module (0220) is arranged to transmit Doppler data on the tool bus controller module (02201) fli the tool bus (10) for communication to the surface unreading device. - where in the Doppler measurement module (0220) the monitoring algorithm designed to during the execution of Doppler measurements calculates an average, relatively low speed of Doppler data which represents a relatively low tool speed. and uses the average low velocity to perform cluster filtering for distant Doppler data representing the relatively low velocity, and processes the filtered Doppler data to obtain Doppler data due to fluid flow. 22. The tool according to claim 21, comprising a tool bus control module (02201) connected to the tool bus (10) and to a main grain roller module (0220) having a signal detector/monitor control module (0239) which regulates a traramrter signal generator module ( 0235) and a transducer switch module (024). 23. The tool according to claim 22, wherein the transmitter signal generator module (0235) for transmission has a signal generator for 4 generating the digital signals and for 4 representing a pulsed output rate (A, Et, C...), and sending the digital signals to the analog transmitter driver amplifier t a transmitter switch module (0233) to form a voltage driver signal to 4 send it via transmitter / receiver switches (0232) ID transducer switch module (024). wherein the transducer switching module (024) couples the voltage driver signals to one or more transducer elements (041) for emitting the one or more ultrasonic pulses (A) and (B). 24. The tool according to claim 22 or 23, wherein the receive transducer switching module (024) switches the selected transducer elements (041) to separate receiver analog front-end amplifiers (0234) representing the strips (A, B...) transmitting the amplified the signals ten parallel analog-tit-dlgital-converters and form a urtral<y>dsi<g>naMidssede for each ultrasoundUile (A, B,..). 25. The tool according to any one of claims 21 - 24, wherein the processing module (022) comprises a signature re-creating module (0225) for the IQ demodulated data and a quantizer (0227) arranged to send the quantized ultrasound data to a log-forming module in main control roles -module (0220), where the Doppler processing module (022D) comprises a Doppler buffer and a PW (pulse bending) Doppler processing module, for sending Doppler data to the main controller module (0220). 27. The tool according to any one of claims 21-26, wherein the rtoved corriroller module (0220) is arranged to send high-resolution backscatter images or Doppler data via a high-resolution optical counter module (02202) on a high-speed memory bus (02203) to a later dedicated memorial workshop (200). 28. The Kelge tool any of claims 21 - 27. where the conical angle is between 12 and 28 degrees. 28. The tool according to any one of claims 24 - 28, wherein the channels of the front-end amplifier (0234) are arranged often time-controlled amplification "again" in the channels. 30. The tool according to any one of claims 21-28, where the transducer-boss structure (04) is arranged on a lower central axial bottom (034) on a lower transverse wall (032) on the nose sleeve (03), and comprises a nosepiece ( 06) on the central axial bolt (034) covering the lower end of the transducer support structure (04). 31. The tool according to claim 29, comprising an ultrasound-transparent window (05) which covers the ultrasound transducer area (041) in the transducer-bringer section (04), where the ultrasound transducer (05) is hooked in place between the lower outer part of the Iransduserhus sleeve ( 03) and the neeedelen (06). 32. the tool according to claim 31. where the ultrasonic window (05) is fitted to the tranaduser housing sleeve (03) by an upper locking ring (062) and the M nose part (08) by a lower locking ring (061). 33. The tool according to claim 32. wherein the notch (061) is chamfered radially by around 17 Dl 28 degrees down from the transverse plane. 34. The tool according to any one of claims 21-33, where the dedicated machine tool (200) is arranged for storing caliper data and all Doppler data and for later application of the image and / or Doppler data on the tool bus (10) and the wireline of the overilate readout unit nirtelemelri capaacity allows si. 35. The tool according to any one of claims 21 - 26, where the number (m) of ultra-quiet transducer elements (041) is between 1 and 12, preferably 2 to 8. 36. The toolbox according to any one of claims 21 - 35, wherein the electronic modules are arranged in an electronic circuit board (02) inside the housing, where the electronic circuit modules include, apart from the ultrasonic circuit board (04), a number of flexprint cables (0242) which extend in pairs through passages (02S3) through the transverse wall (032) up to a probe interface module (025) connected to the switch module (024), further connected to a transmitter and receiver - module (023), further connected to the PM session module (022).