CN2521395Y - Oil field water injection well casing pressure monitoring system - Google Patents

Abstract

The utility model discloses an observation system of a sleeved pressure of a water injection well of an oil field, comprising a pressure-measuring device of a control valve. The utility model is characterized in that the control valve is a self-closing valve respectively composed of a cylinder-typed valve body, a valve core and a self-returning apparatus of the valve body. The valve core is arranged at one end of the valve body. The inserting end of the self-closing valve can pass through in a pressure intake opening of a sleeve pipe of the water injection well, the connecting structure of the connecting end matches with the connecting structure of the pressure intake opening, and the two connecting structures are in fixed connection via detachable sealing. The pressure-measuring device is composed of a pressure sensor and a measuring device in electric connection. The pressure sensor is detachably connected to a cavity of the valve body, enabling fluid sealing to be formed between the outer circle of a housing of the pressure sensor and an inner cavity of the valve body. A pressure-fetching end of the pressure sensor is in pressed connection with the valve core and pulls the valve core to a starting position. Compared with the existing technology, the realized utility model has the advantages of high measuring accuracy, guaranteed normal utilization in winter and the like.

Description

A kind of water injection well in oil fields cover pressure monitoring system

Technical field

The utility model relates to a kind of fluid pressure monitoring system that is applied in the field, oil field, exactly is a kind of water injection well in oil fields cover pressure monitoring system.

Background technology

In the oil recovery process of oil field,, often not only oil well to be set, but also water injection well will be set because operation needs.This water injection well is that cannula cavity water pressure monitoring system etc. forms by water injection pipe, sleeve pipe, casing pressure mainly.Wherein, the cover pressure monitoring system is made up of control valve and pressure tester respectively again.Control valve is made of manually-operated gate usually, and pressure tester then is made of pressure meter.When use installing, manually-operated gate is that the fluid to be measured delivery outlet connects with pressure tappings on being arranged on sleeve pipe, and pressure meter connects with manually-operated gate.The subject matter that existing cover pressure monitoring system in use exists is: 1, since valve and pressure meter all expose in sleeve pipe pressure tappings outside, thereby in using in the winter time, the tested shipwreck that immerses in it is exempted to freeze, thereby influences its operate as normal, even makes it to be damaged; 2, because manometric making precision is lower, and measure error is bigger, this error is not less than 1.5% usually, so the measurement result of this system is not accurate enough.

In the prior art, also have a kind of very high electronic pressure measuring apparatus of gas or liquid pressure measurement and certainty of measurement that is specifically designed to, this device mainly is made up of pressure sensor and measuring instrument, and both electrically connect by lead.The main function of this device is the pressure signal of fluid to be measured or gas can be transformed into the signal of telecommunication and this signal is handled, and then result is shown, stores.Yet up to the present, people also directly do not overlap it pressure tester of pressure monitoring system as water injection well.

Summary of the invention

The purpose of this utility model is for people provide a kind of resistance to frost good, and the water injection well in oil fields cover pressure monitoring system that certainty of measurement is high is so that overcome the problems referred to above that prior art exists.

The purpose of this utility model realizes like this, it comprises control valve, pressure tester, be characterized in that control valve is a self-closing valve, it is made up of with being arranged on this valve body one end and its this end inner chamber being formed spool and the automatic reset device thereof that can open shutoff the cartridge type valve body respectively, but freely pass through in the insertion end Automatic water-filling casing pressure tappings of this self-closing valve, the draw bail of its union end then is complementary with described pressure tappings draw bail, and both form removable sealing and fixing and connect; Pressure tester is made up of pressure sensor that electrically connects each other and measuring instrument respectively, pressure sensor is removable to be connected in the described valve body chamber and to make between its housing cylindrical and the body cavity and form liquid sealing, also makes the crimping and it is pushed into the enable possition mutually of sensor pressure end and described spool.

Above-mentioned measuring instrument is a hand-held measuring appliance.

Be shaped on the relief hole that is connected with valve pocket on the end valve body of above-mentioned self-closing valve union end, it is stifled that nose end is provided with removable hole.

After the utility model was realized, because its pressure tester is made of electronic pressure measuring apparatus, certainty of measurement was very high, and error is not more than 0.3% usually, thereby in use, its measurement result is more accurate.Particularly the enforcement of this technology also provides condition for the user realizes the remote centralized monitoring.For example, the user can set up a center monitors chamber and the measuring instrument of electronic pressure measuring apparatus is arranged at indoor, sets up signal transmssion line and power lead at measuring instrument with being arranged between the pressure sensor of locating each monitoring point simultaneously.Like this, human observer just can obtain monitored data under the situation that needn't go deep into each monitoring point, thereby alleviates working strength, increases work efficiency.In addition, because the parts in addition that the utility model can contact with tested water have only the insertion end of control valve and are positioned at the deformable body assembly of the pressure sensor in its this end chamber, and this end is inserted in the sleeve pipe pressure oral cavity when using installation, so in the use, the utility model still can guarantee operate as normal in the winter time.

Description of drawings

Fig. 1 is that the utility model is formed the mode schematic diagram.

Fig. 2 is the tectonic relationship schematic diagram of control valve and pressure sensor combiner.

Fig. 3 is the connecting mode schematic diagram between the sleeve pipe pressure tappings of composite member shown in Figure 2 and water injection well.

The specific embodiment

As shown in Figure 1, the utility model comprises control valve 37 and pressure tester 35, and its design feature is:

The first, control valve is a self-closing valve, and it is made up of with being arranged on valve body one end and its this end inner chamber being formed spool and the automatic reset device thereof that can open shutoff the cartridge type valve body respectively.But freely pass through in this self-closing valve insertion end Automatic water-filling casing pressure tappings, the draw bail of its union end then is complementary with the draw bail of the described pressure mouth of pipe, and both form removable sealing and fixing and connect.

The concrete form of implementation of self-closing valve as shown in Figure 2.As seen from the figure, cartridge type valve body 10 is fixedly connected and is formed by body 20, shell type connection seat 28 respectively.In the present embodiment, this mode that is fixedly connected is welding.In actual production, this mode that is fixedly connected also can be the gas thread connection or directly body and connection seat be made one; Spool 16 is ladder bar shape members, makes feed pathway 21 in its body, its outer setting seal 14,23,15; The automatic reset device of spool is made up of overcoat 18 and spring 17 respectively.Wherein, make inlet opening 22,24 on the end wall of overcoat 18, the sidewall respectively; When self-closing valve was installed, the spool small end was inserted in the valve body right end chamber, overcoat then with the cylindrical thread connection of this end valve body, spring is arranged between the opposing end surface of spool and overcoat.After self-closing valve forms, do the time spent in no external force, spool can make small end enter fully in the valve body chamber under the spring thrust effect, thereby makes the inlet opening 22,24 that puts outward and the path that is arranged between the feed pathway 21 on the spool is cut off, and control valve is in self-closing state; And when external force acts on spool the inner and promptly illustrates left end end face and this external force greater than spring thrust, the feed pathway inlet that is positioned on the spool side just can shift out from the valve body chamber, thereby this feed pathway is communicated with each inlet opening that puts outward, and self-closing valve is in opening.But its spool place end of self-closing valve assembling back promptly illustrates in the right-hand member one side body Automatic water-filling casing pressure tappings and freely passes through, that is to say that each cross section appearance and size of this end one side self-closing valve body all is not more than the inner cavity size of sleeve pipe pressure tappings, this end constitutes its insertion end.The other end of control valve promptly illustrates the draw bail of left end and the draw bail of pressure tappings is complementary, and both form removable sealing and fixing connection, and this end constitutes its union end.The draw bail of self-closing valve union end comprises the contour structures of valve body connection seat 28, the contour structures and the mutual connecting relation thereof of adapted seal 27.The pressure tappings draw bail comprises pressure tappings end construction, adapted connected piece structure and connecting relation between the two.

Should illustrate that the draw bail form between the water injection well sleeve pipe pressure tappings that Fig. 3 provides and the utility model self-closing valve union end is not unique.In fact, the draw bail form of the pressure tappings that has come into operation at present is multiple in addition, and for guaranteeing the adapted relation, the draw bail form of self-closing valve union end also should have multiple naturally.For example, when pressure tappings only when being arranged on its intraoral gas thread as its draw bail, the draw bail form of self-closing valve union end just should be definite like this: the seal 27 of cancellation among Fig. 2, and on the cylindrical of valve body left end coupling sleeve 28, make the external pipe thread that the Internal Pipe Thread with pressure tappings matches.

The second, pressure tester of the present utility model is made of electronic pressure measuring apparatus, and this device is made up of pressure sensor shown in Figure 1 36 and measuring instrument 34 respectively, and both electrically connect.Pressure sensor is removable to be connected in the valve pocket and to make between its housing cylindrical and the body cavity and form liquid sealing, also makes the crimping and it is pushed into the enable possition mutually of its pressure end and described spool.

The concrete structure mode of electronic pressure measuring apparatus as shown in Figure 2.As seen from the figure: pressure sensor mainly is made up of housing, deformable body assembly 12, circuit board 19, signal output part and power input socket 6, cover for seat 4, end cap 5.Housing is a cylindrical body that is fixedly connected and is formed by body 9, body 26 respectively, and this cylindrical body cylindrical and valve body inner bore match, both sliding-contacts; Deformable body assembly 2 is made up of barrel-shaped member and setting partial circuit original paper on its outer surface respectively.This assembly is connected in the housing right end chamber by its barrel-shaped member and seal 13 sealing and fixing that match with it; Circuit board 19 be fixed in the housing and and deformable body assembly 2 between electrically connect by one group of lead 25; Cover for seat 4 one ends connect with housing left end inner hole thread, realize liquid sealing by seal 3 between the two; Socket 6 is fixed in cover for seat 4 ends by the connector of seal 7 and adapted thereof, and the output of its signal and each wiring terminal of power input connect by one group of lead 30 respectively with between each corresponding contact of circuit board 19; End cap 5 can be nested with the reliability that is connected on the cover for seat 4 and guarantees this connection by anti-loosening rubber ring 8 with opening.After pressure sensor component forms, by its housing and be arranged on hull outside seal 2 and 11 removable be connected in the valve body chamber and make between its housing cylindrical and the body cavity form liquid sealing, the pressure end that also makes sensor is deformable body assembly 2 place ends and the crimping and it is pushed into the enable possition mutually of the spool of self-closing valve, thereby the feed pathway 21 on the spool is communicated with the barrel-shaped member inner chamber of deformable body assembly.

In the prior art, the form of structure of measuring instrument mainly contains two kinds, and a kind of is hand-held, and another kind is fixed, and both basic training are with identical, and difference only is that the former volume is little, in light weight, is more convenient for carrying.From operable angle, the measuring instrument of two kinds of forms all is suitable for the utility model.But, owing to adopt the hand-held measuring instrument to be more suitable for user's present stage operating habit, so selected the hand-held measuring instrument in the present embodiment for use.This measuring instrument mainly is made up of the plug of the software of shell, chip, adapted, display unit, one group of lead can be simultaneously forming for measuring instrument and pressure sensor direct current power source supplying power, joystick key and by signal conductor and power lead and adapted thereof.

In the use, realize removable electrically connecting by described plug, socket between pressure sensor and the measuring instrument; The main function of pressure sensor is that the pressure signal with fluid to be measured changes the signal of telecommunication and output into; The main function of measuring instrument is to receive and the signal of telecommunication of processing pressure sensor output and result stored and show.

In the present embodiment, for improving result of use of the present utility model, be to have made the leakage opening 29 that is connected with body cavity on Fig. 2 left end valve body also, and be provided with removable hole stifled 1 at nose end at the self-closing valve union end.By observing in the leakage opening whether water is arranged, can confirm whether the sealing between spool and the body cavity is reliable.For example, when in the leakage opening water being arranged, illustrate that the sealing between spool and the valve body is unreliable, should change corresponding seal.In addition, when being full of press water in the badly damaged so that whole valve pocket of sealing between spool and the valve pocket, also can valve pocket internal pressure water be released, so that guarantee relevant work, as the safety of pressure sensor service work by relief hole.Yet in actual production, this relief hole and hole are not set when stifled, the utility model also can use.

Use installation of the present utility model and method of operating are: at first, by mode shown in Figure 3, the assembly of pressure sensor and control valve is connected to the end of the pressure mouth of pipe 33 of water injection well by connector 31,32 sealing and fixing; After this, if the user need measure casing pressure the time, can make between measuring instrument and the pressure sensor to electrically connect, at this moment, the force value that can directly read tested water from the display screen of measuring instrument; And when the user no longer needs continue to measure, connecting between measuring instrument and the pressure sensor can be taken apart, then, measuring instrument is properly carried or keeping, in order to using again.

And will overhaul pressure sensor the time, the user can utilize Wrench that it is taken out in the valve body chamber of control valve.At this moment, the spool of control valve can make small end move into fully in the valve pocket under the effect of its automatic reset device and with this complete shutoff in end valve chamber, make control valve be in self-closing state, makes the tested water can not be excessive through pressure tappings.

Claims (3)

1, a kind of water injection well in oil fields cover pressure monitoring system, comprise control valve, pressure tester, it is characterized in that control valve is a self-closing valve, it is made up of with being arranged on this valve body one end and its this end inner chamber being formed spool and the automatic reset device thereof that can open shutoff the cartridge type valve body respectively, but freely pass through in the insertion end Automatic water-filling casing pressure tappings of this self-closing valve, the draw bail of its union end then is complementary with the draw bail of described pressure tappings, forms removable sealing and fixing between the two and connects; Pressure tester is made up of pressure sensor that electrically connects each other and measuring instrument respectively, pressure sensor is removable to be connected in the described valve body chamber and to make between its housing cylindrical and the body cavity and form liquid sealing, the crimping and it is pushed into the enable possition mutually of this sensor pressure end and described spool.

2, a kind of water injection well in oil fields cover pressure monitoring system according to claim 1 is characterized in that described measuring instrument is a hand-held measuring appliance.

3, a kind of water injection well in oil fields cover pressure monitoring system according to claim 1 and 2 is characterized in that being shaped on the relief hole that is connected with valve pocket on the end valve body of described self-closing valve union end, and it is stifled that nose end is provided with removable hole.

Images