CN2756825Y

CN2756825Y - Under well layered flow continuous detector

Info

Publication number: CN2756825Y
Application number: CNU2004200132483U
Authority: CN
Inventors: 周敬训; 孙宝有
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-28
Filing date: 2004-12-28
Publication date: 2006-02-08
Anticipated expiration: 2014-12-28

Abstract

The utility model relates to an underground layered flow continuous detector, which is an underground layered flow detector and belongs to the technical field of an oil field detection technology. A throttling section (6) is connected to a casing of the detector, the outside dimension of the throttling section is matched with a working barrel, and is slightly smaller than the inside diameter of the working barrel of an underground water flow regulator; the throttling section (6) is provided with an upper and a lower locating sensors (5) and (8). A circuit (2) has the function of sampling and recording at high speed. When the throttling section (6) enters into and leaves the working barrel of the underground water flow regulator, the upper and the lower locating sensors (5) and (8) respectively send out signals, high-speed sampling and storage of data of the circuit can be started and stopped. According to time difference by the upper and the lower locating sensors (5) and (8) passing through the same cross section of the working barrel, an up-bound and a down-bound speed of an instrument can be calculated, so as to compensate for a flow. The utility model provides the underground layered flow continuous detector which is convenient for operating and has high accuracy.

Description

Laminated distributor under well flow continuous detecting instrument

Technical field:

The utility model belongs to detection technique field, oil field, relates to a kind of water injection well (comprising polymer injection well) zonal flow rate detecting instrument.

Technical background:

The water injection well zonal flow rate detects and adopts collecting type and non-collective flow formula two big classes usually, most storing electronic instruments that adopt.

The detection method of collecting type is that instrument stand is gone into corresponding injection well downhole flow regulator seating nipple; the water that injects this layer flows into the stratum by flow meter; owing to instrument reliably need be delivered to target seating nipple position and seat envelope; through regular meeting run into because of factors such as underground work tube fouling cause instrument can not be accurately seat go into seating nipple and effectively situations such as sealing cause detecting fail or data inaccurate, and operating difficulties, labour intensity is big, efficient is low.

The detection method of non-collective flow formula is a measuring center flow velocity in oil pipe, be converted to flow (instrumental calibration carries out) according to pipe aperture under the normal inner diameter condition, need to use centralizer to be in the oil pipe center to guarantee instrument, instrument need stop at the corresponding pipeline section of oil pipe when detecting, the pipe aperture variation that causes owing to reasons such as foulings will directly cause detecting the error of data, add the accumulated error that diminishing method calculates, the layer less to injection rate, this error is unacceptable.

Summary of the invention:

The purpose of this utility model is that problem provides a kind of laminated distributor under well flow continuous detecting instrument higher with precision that be convenient to operate in order to solve collecting type detection method operating difficulties, labour intensity is big, efficient is low and non-collective flow formula detection method error is big etc.

Laminated distributor under well flow continuous detecting instrument provided by the utility model, form by last alignment sensor 5 on fishing head 1, circuit 2, flow transmitter 4, restriction portion 6 and the restriction portion and following alignment sensor 8, the external diameter of restriction portion 6 is slightly less than the internal diameter of seating nipple, the circuit of instrument has the function of high-speed sampling record, restriction portion 6 can be made installation separately, also can make one with other parts, the external diameter that changes restriction portion 6 can adapt to the zonal flow rate detection needs of the water injection string of different minimum diameters.

Upper and

lower alignment sensor

5 and 8 is used for testing tube position, when restriction portion 6 enters seating nipple, can produce triggering signal and give circuit 2, this moment circuit high-speed sampling and record data, upper and lower two

position sensors

5 and 8 distance are known, can calculate the translational speed of instrument so that revise the relative current value that therefore produces according to its triggered time difference.

Adopt the ground winch to make instrument uplink and downlink in down-hole string during test, best and effectively the detection position be each layer seating nipple or other minimum diameter place (because of in down-hole string everywhere internal diameter be different, usually minimum diameter is at the seating nipple place of injection well downhole flow regulator), the external diameter of instrument restriction portion and the formed gap of seating nipple internal diameter are less, instrument does not stop in the uplink and downlink process, when restriction portion enters seating nipple, down (or on) alignment sensor sends signal, and the circuit high-speed sampling is also stored data; Go up (or down) and stop the high-speed sampling storage when alignment sensor leaves seating nipple, during this period, restriction portion and seating nipple axial overlap, most water can flow through the sense channel of instrument, the outside has only a small amount of leakage, be in accurate afflux state, it is the highest that detect flow accuracy this moment, the time difference of passing through the same cross section of seating nipple according to last alignment sensor and following alignment sensor calculates the uplink and downlink speed of instrument, thereby compensation is moved the relative discharge that is produced because of instrument with respect to seating nipple, in the upstream or downstream process, all can realize flow detection, all detect in also can the uplink and downlink process so that confirm mutually and compensate.

Usually, the ground winch all is equipped with depth gauge, and when entering the Validity Test degree of depth, can reduce the winch velocity of rotation is the translational speed of lowering apparatus in tubing string, make the orientation triggering signal accurately and reliably with prolong the Validity Test time.

The gap that restriction portion and seating nipple form can make the fraction flow not be detected because of leakage, but its shunting ratio fixes, and can simulate practical working situation calibrational capacity sensor to revise.

With the eccentric water injection string of routine is example, conventional eccentric water injection well lower tubular column is made up of oil pipe, packer and eccentric injection mandrel, usually, pipe aperture is 62mm, the minimum place of whole tubing string internal diameter is the seating nipple of eccentric injection mandrel, and its internal diameter is 46mm, and the water yield at each eccentric injection mandrel seating nipple place is the summation of this injection well downhole flow regulator and following each implanted layer water yield, detect the flow at each injection well downhole flow regulator seating nipple place and adopt diminishing method, can obtain each layer injection rate.

Laminated distributor under well flow continuous detecting instrument provided by the utility model does not need the seat envelope not need to stop efficient height simple to operate yet; Because instrument is in accurate afflux state, accuracy of detection height when detecting flow; And because of alignment sensor is housed on the instrument, at best and effectively high-speed sampling and record data during the detection position, test data and curve are clear and intuitive automatically.

Fig. 1 is the structural representation of laminated distributor under well flow continuous detecting instrument provided by the utility model.

Fig. 2 is the last alignment sensor 5 of laminated distributor under well flow continuous detecting instrument provided by the utility model and the principle schematic of following alignment sensor 8.

Among Fig. 1,1. 8. times alignment sensors of alignment sensor 6. restriction portions, 7. flow channels on fishing head 2. circuit 3. inlet openings 4. flow transmitters 5..

Among Fig. 2,9. Hall circuit 10. magnet steel 6. restriction portions 7. flow channels

The specific embodiment:

As shown in Figure 1: described laminated distributor under well flow continuous detecting instrument is by fishing head 1, circuit 2, inlet opening 3, flow transmitter 4, last alignment sensor 5, following alignment sensor 8, restriction portion 6 and flow channels 7 are formed, on, following

alignment sensor

5 and 8 is installed on the restriction portion 6, inlet opening 3, the inner chamber of flow transmitter 4 and flow channels 7 are communicated with, when restriction portion 6 enters seating nipple, most water enters through flow transmitter 4 from inlet opening 3 and flows out from flow channels 7, circuit be used to handle the signal of flow transmitter 4 and basis and, following

alignment sensor

5 and 8 triggering state begin and stop the storage of high-speed sampling and data.

Flow transmitter 4 can be the sensor of electromagnetism, ultrasonic wave, whirlpool or other principle.

As shown in Figure 2: the last alignment sensor 5 and the following alignment sensor 8 of described laminated distributor under well flow continuous detecting instrument are made up of at least two pairs of switch Hall circuits 9 and magnet steel 10 respectively, they place the same cross section of instrument restriction portion 6 and along the center symmetry, because of the eccentric injection mandrel seating nipple is that permeability magnetic material is made, so, when restriction portion 6 near the time can change magnet steel 10 time, the magnetic line of force of magnet steel 10 distributes and is changed, the magnetic field intensity that acts on the Hall circuit can change, thereby changes the output state of Hall circuit 9.Have only when two paths of signals changes output state simultaneously, the output triggering signal of last alignment sensor 5 and following alignment sensor 8 is only useful signal, can avoid like this go into the well and on carry in the process the one-sided generation erroneous trigger signal during near other position of tubing string of restriction portion.

Claims

1. laminated distributor under well flow continuous detecting instrument, comprise fishing head, circuit, flow transmitter and shell etc., it is characterized in that: the inner chamber of inlet opening (3), sensor (4) and flow channels (7) are communicated with, on tool housing, connect restriction portion (6), the internal diameter size coupling of its outside dimension and seating nipple, and, alignment sensor (5) and following alignment sensor (8) are housed on the restriction portion 6 less than the seating nipple internal diameter.

2. laminated distributor under well flow continuous detecting instrument according to claim 1 is characterized in that: go up alignment sensor (5) and following alignment sensor (8) and be made up of at least two pairs of Hall circuits (9) and magnet steel (10) respectively.

3. laminated distributor under well flow continuous detecting instrument according to claim 1, it is characterized in that: restriction portion (6) can be a separate part, also can make one with tool housing.