CN2878672Y

CN2878672Y - Under-well lamination controller for oil well

Info

Publication number: CN2878672Y
Application number: CNU2006200010428U
Authority: CN
Inventors: 王晓东; 丁继龙; 许明
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-18
Filing date: 2006-01-18
Publication date: 2007-03-14
Anticipated expiration: 2016-01-18

Abstract

The utility model relates to a downhole stratified measurement and control instrument for oil well, which contains a shell and an apparatus warehouse assembled in the shell, wherein, the apparatus warehouse is a cylinder case on which a plunger hole is arranged and with a closed upper end, the lower end of the cylinder case is connected with an apart plug; a single layer fluid feeding pipe makes the plunger hole connect with the shell, an annular up-down connective channel is formed between the apparatus warehouse and the shell, the plunger is assembled by skidding mode with the plunger hole, the lower end of the plunger connects with a wire rod on whose lower end a motor shaft is connected; a SCM system, a battery, a communication interface and a motor are electric connected and fixed on the bottom of the apparatus warehouse. The skidding plunger controlled by the SCM opens or closes automatically the fluid channel to make fluid on the corresponding oil storage stratum flow into the oil well, high exit water level is judged according to water content of the oil stratum detected on the ground, multi oil well downhole stratified measurement and control instruments are connected in series with the oil extraction test strings, the corresponding various downhole stratums can be blocked respectively and fluid channels of various stratums can be opened, so the purpose of finding high water exit stratum with only one downhole operation can be reached, the instrument has reliable operation, low construction cost and reduced oil extraction cost.

Description

Oil well laminated distributor under well measurement and control instrument

Technical field

The utility model relates to a kind of laminated distributor under well measurement and control instrument that uses in oil development is produced, be in the laminated distributor under well shutoff with open the fluid passage of oil reservoirs position specifically with this instrument, cooperate with ground moisture content detecting instrument, find out the instrument of the high water-yielding stratum in the oil reservoirs position, down-hole.

Background technology

After waterflood stage was carried out in the oil field, people carried out drilling well again around original oil well, as water injection well.With pump the water brute force is injected well on ground, after water enters each oil reservoirs position, down-hole, can drive crude stream from the oil reservoir back near oil well, reach the purpose that water filling increases oil.But because the influence of various factors such as strata structure of each oil reservoirs position, the effect difference of displacement of reservoir oil by filling water, even cause and inject the water individual layer and advance by leaps and bounds and flow into oil well in a large number, make the crude oil of other layer position in the well be difficult to flow out again, do not reach the purpose of displacement of reservoir oil by filling water, cause waterflood owing to high water-yielding stratum occurs on the contrary.So require in oil well production, must detect at any time the moisture content of each oil reservoirs position, take the technological measure of the high water-yielding stratum of individual layer shutoff then targetedly.Obviously, how prejudging which layer position, down-hole is that high water-yielding stratum is very crucial task.

Traditional way is the reciprocal working system of mechanical type, and promptly oil nozzle or dead oil mouth (promptly dead stifled) are installed in corresponding each oil reservoirs position in oil recovery zonal testing tubing string, judge by the dead oil mouth that repeatedly changes the outfit which layer is high water-yielding stratum in each layer position.For example there are three oil reservoirs the down-hole, then at first test string is sent into oil well, at the orlop oil nozzle of feigning death, purpose is not allow orlop have fluid to enter in the well, because of upper two layers is equipped with oil nozzle, only allows upper two layers flow in the well, and detect full well water content at the ground well head and whether descend; If do not descend, again oil well is proposed all test string, load onto the dead oil mouth in the intermediate layer, whether levels charge of oil mouth is all sent into test string in the well, detect full well water content at the ground well head and descend; If do not descend, again oil well is proposed all test string, load onto the dead oil mouth in the superiors, whether all the other two-layer charge of oil mouths are all sent into test string in the well again, detect full well water content at the ground well head and descend.Obviously, oil nozzle of every transposing must be employed operation troop and equipment, and test string is all proposed and send into oil well, at least expensive several ten thousand yuan, the oil well well depth has 3～5 big layers at 1000～3000 meters usually, repeatedly repeat aforesaid operations, not only take a lot of work but also time-consuming, cause construction cost very high.

The utility model content

The utility model is in order to overcome the defective of prior art, the automatic shutoff of a kind of energy is provided and opens the oil well laminated distributor under well measurement and control instrument of oil reservoirs position in the oil well, system cooperates with the ground measurement of water ratio, judges the high water exit in the oil well, thereby reduce the cost of oil exploitation, improve oil recovery efficiency.

The utility model oil well laminated distributor under well measurement and control instrument comprises the cylindrical case and the instrument storehouse of coaxial package within it, and the instrument storehouse is that the center is axially arranged with the tubular shell that plunger hole, upper end closed, lower end are tightly connected with the disintegration plug; The individual layer feed tube is fixedlyed connected respectively along the back of radially passing of shell and upper end, instrument storehouse, and the middle part disconnection, and the skin of plunger hole and shell is communicated with, and forms the annular runner of up/down perforation between instrument storehouse and the shell; Big, middle little sliding spool in two ends and plunger hole slide equipped, and the sliding spool upper end is corresponding with the individual layer feed tube, its lower end and screw mandrel are rotationally connected, fixedlying connected with the output shaft of motor in the lower end of screw mandrel, is fixed on the lower end in the instrument storehouse behind the mutual electric connection of SCM system, battery, communication interface and motor; On the housing in instrument storehouse, be provided with the individual layer fluid hole that is communicated with plunger hole and annular runner symmetrically, sliding spool and plunger hole upper end constitute the air balance chamber; Limit switch is located on the hole wall of the plunger hole between sliding spool and the motor, and the upper/lower terminal of shell is respectively equipped with the gas thread that connects usefulness.

The utility model oil well laminated distributor under well measurement and control instrument wherein is equipped with electronic pressure gauge at the top of instrument storehouse housing, and is communicated with the individual layer feed tube by the impulse through hole that is built up on the housing.

The utility model oil well laminated distributor under well measurement and control instrument wherein is provided with O-ring seal on the slide plane of sliding spool.

The utility model oil well laminated distributor under well measurement and control instrument, adopt the sliding spool of the Single-chip Controlling operation of DC power supply to open or close fluid passage own automatically, make the fluid on the corresponding oil reservoirs flow into oil well, thereby go out the moisture content of oil reservoirs position through ground detection, reach the purpose of judging high water exit, particularly a plurality of oil well laminated distributor under well measurement and control instruments and oil recovery test string are chained together, under the corresponding well each layer all can be respectively shutoff and open each layer fluid passage automatically, can realize that one-stop operation is gone into the well and just can find out the purpose of high water-yielding stratum, it is reliable, operating expenses is low, thereby reduced the cost of oil exploitation, improve oil recovery efficiency, have considerable economic.

Description of drawings

Fig. 1 is the utility model oil well laminated distributor under well measurement and control instrument structural principle schematic diagram.

The specific embodiment

As seen from Figure 1, the utility model oil well laminated distributor under well measurement and control instrument, comprise the cylindrical case 1 and instrument storehouse 2 two large divisions of coaxial package within it, instrument storehouse 2 is axially arranged with the tubular shell that plunger hole 18, upper end closed, lower end are tightly connected with disintegration plug 11 for the center; Individual layer feed tube 3 is fixedlyed connected respectively along the back of radially passing of shell 1 and 2 upper ends, instrument storehouse, and the middle part disconnection, and the skin of plunger hole 18 and shell 1 is communicated with, and forms the annular runner 17 of up/down perforation between instrument storehouse 2 and the shell 1; Big, the middle little sliding spool 5 in two ends slides equipped with plunger hole 18, and sliding spool 5 upper ends are corresponding with individual layer feed tube 3, its lower end and screw mandrel 6 are rotationally connected, fixedly connected with the output shaft of specific type of electric machine 7 in the lower end of screw mandrel 6, after being interconnected by circuit, SCM system 8, battery 9, RS-232 communication interface 10 and motor 7 together be fixed on the lower end in the instrument storehouse 2, and good with 11 seals with screwed joint of disintegration plug; On the housing in instrument storehouse 2, be provided with the individual layer fluid hole 4 that is communicated with plunger hole 18 and annular runner 17 symmetrically, sliding spool 5 constitutes air balance chamber 14 with plunger hole 18 upper ends; Limit switch 16 is located on the hole wall of the plunger hole 18 between sliding spool 5 and the motor 7.The slide plane of sliding spool 5 is provided with a plurality of O-ring seals 15, as the top sealing ring is to prevent that fluid from entering air balance chamber 14, the intermediate seal circle is in off position the time, cut off the individual layer runner of public sprue and certain oil reservoirs position, the lower seal circle is to prevent that fluid from entering in the instrument storehouse 2 that motor 7 parts such as grade are housed; The upper/lower terminal of shell 1 is respectively equipped with the inner and outer pipe screw thread that connects usefulness.

Operating principle of the present utility model: the utility model oil well laminated distributor under well measurement and control instrument opens or closes the course of work of certain oil reservoirs position and is controlled by SCM system 8 in the down-hole, thereby before going into the well, should back out disintegration plug 11, with the startup of control sliding spool 5 operations, the time that stops, return again and count, technical datas such as the direction of rotation of motor weave control program in advance, be input in the SCM system 8 by RS-232 communication interface 10, the disintegration plug 11 that will be provided with sealing ring is again screwed on, and good seal.Again according to the down-hole situation, it is serially connected in the oil recovery test string, together transfer on the oil reservoir predetermined in the oil well, at this moment the outside of shell 1 is this layer fluid passage, after the electric motor starting operation, because the both forward and reverse directions in cycle rotates drive sliding spool 5 and slides up and down in plunger hole 18, when upwards operation of sliding spool 5, when making its middle reducing diameter part position be in the position of individual layer feed tube 3 correspondences, the fluid of this layer enters plunger hole 18 through individual layer feed tube 3, and from individual layer fluid hole 4 outflow remittance annular runners 17, this runner is public sprue, all can walk freely because of the fluid of other each layer and to flow through, promptly this layer fluid is in the logical state that is opened, and fluid is flowed out through public sprue.Otherwise, when motor 7 backward rotation, sliding spool 5 moves downwards, individual layer feed tube 3 is left in reducing diameter part position in the middle of making it, and correct on the sliding spool 5 and block individual layer feed tube 3 and plunger hole 18, promptly blocking this layer fluid can not flow out through plunger hole 18, annular runner 17, and at this moment, this layer fluid is in the state of being closed.When sliding spool 5 operations, whether move into place, then, simultaneously status signal is fed back to SCM system 8 by the lower end of sliding spool 5 and the state decision of limit switch 16.Sliding spool 5 constitutes air balance chamber 14 with plunger hole 18 upper ends and plays the pressure balance effect, to alleviate the axial load of motor 7.The pressure of this layer fluid that opens and closes is by being built up in the impulse through hole 13 that is communicated with individual layer feed tube 3 on the housing, recorded by the electronic pressure gauge 12 at the top that is installed in instrument storehouse 2 housings.According to the operating condition of instrument and the measurement result of fluid pressure, the metering system on ground just can draw owing to the variation of closing and opening moisture content in this layer output liquid fluid that causes to this laminar flow road, judges whether it is high water-yielding stratum.

Usually the oil well well depth is at 1000～3000 meters, 3～5 big oil reservoirs are arranged, at this moment according to the reservoir depth data, the a plurality of electronic switch layerings of serial connection are once transferred in the oil well in the oil recovery test string, and each water detector is corresponding one by one with oil reservoir, when at this moment presetting each layer control program, open and close respectively in chronological order, during as the 3rd layer of action, first and second layer is failure to actuate; And in second layer when action, be failure to actuate for first and third layer; So analogize, to guarantee that when the ground well head measures moisture content the public sprue in down-hole has only a layer position to have fluid to flow into.Like this in a bite oil well, only need once on-the-spot tubing string operation, the moisture content of full well production fluid changes data in the time of can obtaining each individual layer of down-hole simultaneously and closed separately and open, which layer is the accurate judgement of high water exit in the full well thereby once finish.After this, people just can adopt other oil production technology measure to remove this layer of shutoff, and the oil of other oil reservoirs is flowed out, and guarantee the lasting high yield of oil well.

The utility model oil well laminated distributor under well measurement and control instrument can be widely used in the layering water detection engineering after the waterflood.

Claims

1, a kind of oil well laminated distributor under well measurement and control instrument, it is characterized in that comprising the cylindrical case (1) and the instrument storehouse (2) of coaxial package within it, described instrument storehouse (2) is axially arranged with the tubular shell that plunger hole (18), upper end closed, lower end are tightly connected with disintegration plug (11) for the center; Individual layer feed tube (3) is fixedlyed connected respectively along the back of radially passing of described shell (1) and instrument storehouse (2) upper end, and the middle part disconnects, the skin of described plunger hole (18) and described shell (1) is communicated with, and forms the annular runner (17) of up/down perforation between described instrument storehouse (2) and the shell (1); Big, the middle little sliding spool (5) in two ends slides equipped with described plunger hole (18), and described sliding spool (5) upper end is corresponding with described individual layer feed tube (3), its lower end and screw mandrel (6) are rotationally connected, fixedly connected with the output shaft of motor (7) in the lower end of described screw mandrel (6), the SCM system (8), battery (9), communication interface (10) and the described motor (7) that are installed in the box body are fixed on interior lower end, described instrument storehouse (2) behind the electric connection mutually; On the housing in described instrument storehouse (2), be provided with the individual layer fluid hole (4) that is communicated with described plunger hole (18) and described annular runner (17) symmetrically, described sliding spool (5) constitutes air balance chamber (14) with described plunger hole (18) upper end; Limit switch (16) is located on the hole wall of the described plunger hole (18) between described sliding spool (5) and the described motor (7), and the upper/lower terminal of shell (1) is respectively equipped with the gas thread that connects usefulness.

2, oil well laminated distributor under well measurement and control instrument according to claim 1 is characterized in that at the top of described instrument storehouse (2) housing electronic pressure gauge (12) being housed, and is communicated with described individual layer feed tube (3) by the impulse through hole (13) that is built up on the housing.

3, oil well laminated distributor under well measurement and control instrument according to claim 1 and 2 is characterized in that being provided with O-ring seal (15) on the slide plane of described sliding spool (5).