Method of calculation of plurality of segments of tubes of well

FIELD: mining; physics.

SUBSTANCE: method involves implementation of wire coil under power for generation of magnetic field in proximity to well. Tube segments plurality trips in and out of well, registering of changes in magnetic field caused by trips of connecting couplings of tube segments through magnetic field, with this changes registered by means of a device for measuring a magnetic flow, filtration of thus obtained signal and calculation of number of changes result in obtaining the number of segments of tubes.

EFFECT: automatic inventory of number of sections of cased or production tubes lowered into well.

26 cl, 5 dwg

 

Prerequisites to the creation of inventions

After drilling an oil or gas well using a drilling rig and installation of casing installation dismantle and take away from the drilling site. From this point, one usually uses a mobile unit for repair wells. Repair (maintenance) typically includes, among other things, the introduction and removal of the inner columns of pipes and sucker rods. When drilling rig or installation for well repair works on site, working on the installation team must register operations introduction the casing, lift pipes and sucker rods in the well or deletes them from the well. This entry is an important part of the documentation on the well or the history of the well and will often call during subsequent operation of the well. However, the counting of individual segments of casing pipes, vacuum pipes and sucker rods or their couplings and then communication with depth in the well, where are these individual segments of casing pipes, vacuum pipes and sucker rods or joints, can be a tedious task, which is prone to errors due to the human factor.

Although there are many devices and methods of localization and registration of pipe the connections, this technology generally relates to casing pipes and Elevator pipes that are already in the well. For example, described in U.S. patent 6032739 and 6003597. Current technology maintenance of wells does not provide means for automatically counting the number of segments of pipe or couplings at the time of extrusion casing, lift pipes or rods from a well or doing it. Moreover, there is no technology that allows you to automatically enter this information into the database. Finally, there is no system that allows you to automatically provide the operator continuously updated data count casing, lift pipes or rods, when they are introduced into the well or pulled from the well. The present invention is to remedy these disadvantages.

Summary of invention

Casing Elevator pipe or pump rod, which is injected into the well or pulled from a well, usually made from the same metal, usually steel or some other alloy black metal. Magnetic induction and magnetic permeability of the individual tubes is approximately the same because of the constant characteristics of the metal, the same wall thickness and of the same external and internal is nego diameters, which usually meet the demanding specifications of the manufacturer. Only when the ends of the Elevator or casing sbencivu together using couplings or collars, magnetic induction to a certain extent varies along the length of the pipe string. Device for measuring magnetic induction, installed in the wellhead, which allows to measure the change of magnetic flux, can monitor these changes flow in each segment of the pipe or coupling, and to determine when a segment of a tube or sleeve of the casing includes the well or goes out of it. The number of changes in the magnetic flux directly (right) correlates with the number of pipe segments (whips or cuffs that are passing by the measuring device; therefore, it can be automatically produced accurate inventory of the number of segments (segments of) the casing or lift pipes introduced into the well.

Brief description of drawings

Figure 1 shows a side view of the known installation for repair of wells with extended (deployed) derrick-crane.

Figure 2 shows a side view of the known installation for repair of wells with retracting (retracted) derrick-crane.

Figure 3 shows how to produce lifting and lowering of the inner tubing string by means of the known installation.

Figure 4 conceptually before the vision about one of the variants of the present invention.

Figure 5 shows the different variants of one of the elements in accordance with the present invention.

Disclosure of inventions

We now turn to a consideration of figure 1, showing a retractable, self-contained unit 20 for repair of wells, which contains the chassis 22, mounted on wheels 24, a motor 26, a hydraulic pump 28, an air compressor 30, the first transmission gear 32, the second transmission 34, the winch 36 variable speed, block 38, lengthen the derrick 40, the first hydraulic cylinder 42, a second hydraulic cylinder 44, the monitor 48 and retractable rack 50. The motor 26 is selectively connected to the wheels 24 and to the winch 36 through suitable transmission 34 and 32. The engine 26 also causes the hydraulic pump 28 through line 29 and the air compressor 30 through line 31. Air compressor 30 feeds the pneumatic wedge grip (not shown)and the hydraulic pump 28 nourishes kit hydraulic tongs for pipes (not shown). The hydraulic pump 28 also supplies power to the hydraulic cylinders 42 and 44, which respectively extend and rotate the derrick 40, in order to selectively set the derrick 40 is in the operating position (figure 1) and in stenothoe position (figure 2). In the working position the derrick 40 is directed upwards, however, its longitudinal centerline 54 has an offset angle 56 from the vertical. This offset angle 5 provides access unit 38 to the wellbore 58 without interference, created by the frame derrick-crane, and allows for quick installation and removal of segments of the inner tube, such as the segments of the inner pipe string 62 and/or rod (figure 3).

Many trunks wells are designed as a "pipe in pipe". The outer column tube or casing is typically formed of pipe sections connected together by means of the collars of the casing. The inner column pipe or sucker rods, or vacuum tubes are usually formed from line segments (segments) of pipes connected together by means of pipe couplings. When install segments of the inner pipe string, the individual segments of pipe sbencivu together using hydraulic pipe wrench (not shown). Hydraulic pipe wrenches known in themselves, and this name refers to any hydraulic tool, which allows you to screw together two pipes or two pump rod. During operations screwing unit 38 supports each tube segment when its screw to put in the well column pipe. After a connection block 38 supports consisting of all segments of the column, so that the whole column as a whole, and containing a new segment of pipe may be lowered into the well. After lowering the column is fixed and the block 38 to take the AET a new segment of pipe for connection with the column. On the contrary, during operation of unscrewing the block 38 lifts from well the entire column that contains the segments of the pipe, as long as at least one individual segment will not be above ground level. After that the column is fixed, and then the block 38 is used to support a segment of the pipe, while it is disconnected from the column. The block 38 is then used to move individual segment of the pipe aside and return for further lifting so that you can disconnect the other individual pipe segments from the column.

The winch 36 controls the movement of the cable 37, which goes from the winch 36 top site 55 crown seal gear (crown block)located at the top of the derrick-crane 40, and supports the traveling block 38. The winch 36 spool and unwind the cable 37, causing the traveling block 38 moves between the node 55 crown corks gear and position on the floor, which is usually located at the wellbore 58, but may be at the level of the raised platform (not shown)located above the wellbore 58.

Device for measuring the magnetic flux is well known in themselves, and are now using many types of devices for measuring magnetic flux. Some such devices are described in U.S. patents 6032739 and 6003597. One such known devices simply contains round (which bmode) wire, wound around the magnet or located near it. Some serial devices use two permanent magnet with the same pole facing the coil. In accordance with the present invention can also be used known Hall sensors and magnetic sensors.

In accordance with some variations of the present invention, for measuring changes in the magnetic flux using a voltmeter, which measures the induced current that occurs in the coil of wire as a result of changes in the magnetic flux. In some cases, the voltmeter is calibrated to zero when the casing or the Elevator tube is open to the magnetic field. Therefore, the increase or decrease in voltage will indicate the passage of the coupling or pipe segment through a magnetic field. When measuring with a voltmeter some voltage calculation system interprets this as the passage of the coupling or the pipe segment, and to count only accept readings above a certain level. Experts will readily understand how to determine the required minimum readings, which corresponds to the passage of the coupling or the pipe segment, and this minimum will likely be different for different applications.

Figure 4 is given a General idea of what one embodiment of the present invention. When traveling block 1 extends a pipe or rod 3 from the well or puts it in the hole, coupling 4 pipe or rod passes through the device 5 for measuring the magnetic flux located at the mouth of the 6 wells, or is in the immediate vicinity of the device 5. The casing pipe is mainly homogeneous, so the signal if it is perceived by the device 5 for measuring the magnetic flux passing the tube housing is a constant (unchanging); need to change lines of magnetic induction to induce voltage changes. In contrast, when the coupling passes through the device 5 for measuring the magnetic flux or in the immediate vicinity, the nature of the coupling, due to the presence of the air gap or increase the cross-sectional area of the metal causes an interrupt and moving lines of magnetic induction. This shift, change or interruption induces an output voltage in the receiving coil. A corresponding output signal 7, which is shown on the chart, carries information about the measured voltage or current. This signal is usually too much noise and has a low signal-to - noise, so the signal 7, in accordance with some variations, are sent to the processing unit 8. The processing module 8 filters the signal and has a p is guirey threshold level, so that the output signal of the module 8 is a pure impulse 13, showing the signal at the input of the module 8 is above the threshold level. Thus, when properly selected threshold level processing extension 8 at its output gain momentum whenever the coupling passes through the device 5 for measuring the magnetic flux or in the immediate vicinity. A pulse signal 13 from the output of the processing unit 8 is sent to the module counter 9, which simply counts arriving at its input pulses (13). This information is then entered through the data logger 12 in the database during the event or just enter in the total at the end of the run, to give the total number of segments of pipe or couplings, which have passed through the measuring device 5. In accordance with an alternative output signal from the module counter 9 can act on the display screen (display) 10. In accordance with the additional option of a sound signal 11 can be heard whenever the coupling passes through the wellhead.

We now turn to a consideration of figure 5, which shows the various means of detecting changes in magnetic flux. The first element 100 is a simple winding, through which a DC current is flowing. When the metal connecting m is the nafta or the segment of the pipe pass through the wellhead, this leads to a change in DC. Control this change allows you to determine when the coupling is introduced into the well, or extracted from it. The second shows the item 200 use two windings, the first winding creates a magnetic field, and the second winding perceives the induction caused by the passage of the coupling. When using this option controls the output voltage of the second winding to count the number of couplings, which have passed through the wellhead. Finally, the third element 300 includes permanent magnets and a coil, which may be located between the magnets or wound around them. When coupling passes by that item, change the line of magnetic induction, resulting induced voltage in the winding.

It can be assumed that the change in magnetic flux caused by air gaps in the thread between the couplers and/or cuffs (and the corresponding segments of pipe) or by increasing the volume of metal that is present in the coupling and/or the cuff. Regardless of the reasons for the change of magnetic flux in the case when the device for measuring magnetic flux detects a significant change pooka, you can come to the conclusion that the sleeve or tube segment passes through the change is sustained fashion device. By counting each pulse - that is, significant changes of the magnetic flux operator or other person can determine how many segments of pipe has been lowered into the well or stretched out. Due to the likely presence of noise, in accordance with some variations, the signal magnetic flux is filtered, so that only the significant variations of the flow when the coupling or the pipe segment passes through the measuring device is measured and counted.

After the device for measuring magnetic flux finds significant variation of the magnetic flux, this signal is converted into a signal for the counter, which is then sent to the corresponding counter, such as a stepper mechanical meter with relay drive or GUI. The counting device generates the current control determines the number of pulses and, consequently, the number of segments of pipe that passed through the sensor (through the device for measuring magnetic flux). Device for converting variations of magnetic flux in the signal for the counter, which is then sent to the corresponding counter is well known and can contain are described here above the means of signal processing. In accordance with some variations of the signal can be directly submitted to the computer system and automatically put the email summary table. In this case, the number of lengths of pipe which have been introduced into the well or pulled out of her, easily can be tracked by the system operator.

In accordance with one of the options instead of placing a sensor device for measuring magnetic flux. - Approx. translator) at the wellhead or in the immediate vicinity of coil wire or the Hall sensor can be embedded or pressed into the cleaning device. Cleaning the device is placed around the pipe or rod inserted into the bore, in order to wipe any excess fluid from the pipe or rod. In this case, the detection signal becomes independent from the wellhead, while getting the results similar to those obtained in the above-described embodiments.

Despite what has been described the preferred embodiment of the invention, it is clear that it specialists in this field can be amended and supplemented, which do not extend, however, beyond the scope of the claims.

1. The way of counting the many segments of pipe in the well, which requires the use of an energized coil of wire to obtain the magnetic field in the immediate vicinity of the well, moving many segments of pipe into the well and out of it, detecting changes in the magnetic field caused by the passage from denitely coupling pipe segments through a magnetic field through the device for measuring magnetic flux, filtration obtained from this tool, signal and counting the number of changes of the magnetic field, resulting in a get the number of pipe segments.

2. The method according to claim 1, wherein a set of pipe segments are selected from the group comprising segments of casing pipes, vacuum pipes and bars.

3. The method according to claim 1, in which the coupling pipe segments are selected from the group which consists of the coupling and cuffs.

4. The method according to claim 1, in which detect changes in the magnetic field by means of a voltmeter connected to the coil of wire located in the immediate vicinity of the device to create a magnetic field.

5. The method according to claim 1, in which changes in the magnetic field calculated using stepper mechanical counter driven by a relay.

6. The method according to claim 1, in which the results of the counting pipe segments are sent to the computer system.

7. The method according to claim 6, in which the results of the counting pipe segments automatically injected into the spreadsheet.

8. The method according to claim 1, wherein the device for measuring the magnetic flux is integrated or embedded in a device for wiping pipes.

9. The method according to claim 8, in which the device for measuring magnetic flux selected from the group of round wires or sensor X is the lia.

10. The method according to claim 1, wherein the processing module generates a pulse signal based on the filtered signal output device for measuring magnetic flux, and the specified pulse signal carries information about the number of segments of pipe inserted into the well, or extracted from it.

11. The method according to claim 10, in which the counter counts the number of pulses.

12. The method according to claim 1, in which use an audible signal at each passage of the tube segment introduced into the well, or extracted from it.

13. The method according to claim 1, in which the number of segments of pipe inserted into the well, or extracted from wells, indicate on the display.

14. The way of counting the many segments of pipe in the well, which requires the use of an energized coil of wire to obtain the magnetic field in the immediate vicinity of the well in which the device for measuring the magnetic flux is integrated or embedded in a device for wiping pipes, moving many segments of pipe into the well and out of it, detecting changes in the magnetic field caused by the passage of couplings pipe segments through a magnetic field, and a count of the number of changes of the magnetic field, resulting in a get the number of pipe segments.

15. The method according to 14, wherein a set of pipe segments are selected from the group that entering the segments of the casing, lift pipes and rods.

16. The method according to 14, in which the coupling pipe segments are selected from the group which consists of the coupling and cuffs.

17. The method according to clause 15, which detect changes in the magnetic field by means of a voltmeter connected to the coil of wire located in the immediate vicinity of the device to create a magnetic field.

18. The method according to 14, in which changes in the magnetic field calculated using stepper mechanical counter driven by a relay.

19. The method according to 14, in which the results of the counting pipe segments are sent to the computer system.

20. The method according to claim 19, in which the results of the counting pipe segments automatically injected into the spreadsheet.

21. The method according to 14, in which the device for measuring magnetic flux selected from the group of round wires or Hall sensor.

22. The method according to 14, which additionally provides for the use of processing module to filter the output signal of the device for measuring magnetic flux.

23. The method according to item 22, in which the processing module generates a pulse signal based on the filtered signal output device for measuring magnetic flux, and the specified pulse signal carries information about the number of pipe segments introduced into the well is at or retrieved from it.

24. The method according to item 23, in which the counter counts the number of pulses.

25. The method according to 14, in which use an audible signal at each passage of the tube segment introduced into the well, or extracted from it.

26. The method according to 14, in which the number of segments of pipe inserted into the well, or extracted from wells, indicate on the display.



 

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