CN2340896Y

CN2340896Y - High accuracy storing style temperature and pressure meter

Info

Publication number: CN2340896Y
Application number: CN 97216255
Authority: CN
Inventors: 骆仁星; 马云泽; 李驰
Original assignee: TAIHE ELECTRIC (XIANGFAN) CO Ltd
Current assignee: TAIHE ELECTRIC (XIANGFAN) CO Ltd
Priority date: 1997-06-02
Filing date: 1997-06-02
Publication date: 1999-09-29
Anticipated expiration: 2007-06-02

Abstract

The utility model discloses a high-accuracy storing type temperature and pressure meter. The utility model is an independent entirety which is mainly composed of a sealing type housing 1, a pressure sensor 2, a temperature sensor 3, a data acquisition storing circuit 4, a chip interface 5, a controllable battery 6, etc., and the entirety is unnecessary to connected with a cable. The utility model has the advantages that the power supply of each part in the data acquisition storing circuit can be automatically switched on or off, a plurality of groups of data which are acquired underground can be continuously stored and recorded, and the temperature and the pressure of a medium can be directly measured; the utility model also has the advantages of continuous, long working time, simple operation, etc. The utility model is suitable for measuring various underground temperature and pressures in oil fields.

Description

A kind of high accuracy memory type thermobarometer

The utility model relates to the instrument of a kind of oil and gas wells in oil fields downhole temperature, the automatic acquisition, storage of pressure.

Parameters such as oil and gas wells in oil fields down-hole pressure, temperature are most important to the production in oil field.The quality and the block oil reservoir distribution situation of living in of this oil gas well working condition can be judged by to down-hole pressure, temperature curve analysis in the oil field.So the order of accuarcy of oil gas well surveying temperature and pressure and method of testing are very important concerning the oil field.

At present, generally adopt mechanical-type manometer at home, it is recorded in data on the card, analytical calculation force value thus, and its certainty of measurement is not high, and it is also lower to measure success rate." the oil well downforce testing arrangement " that application number 92205665 discloses, it is made up of aboveground and down-hole two parts, and the downhole testing signal is transmitted to aboveground after amplifying by lead, carry out the data processing by aboveground instrument, this mode more complicated that operates." the high-precision electronic pressure gauge " of application number 93237518 disclosures and many similar enterprises produce the various electronic pressure gauges of trial-production in addition, all there is some deficiency, such as the mode of operation complexity, can not many mouthfuls of well data of recording occurring continuously, the testing time is short, temperature-responsive is slow, can't effectively record well temperature gradient and pulsation well temperature, temperature to the pressure test influence greatly, the build-up of pressure measuring accuracy is low etc.

The purpose of this utility model be for oilfield well testing provide a kind of execute-in-place simple, with the high accuracy memory type electron temperature pressure gauge that does not abovegroundly need that cable is connected, many mouthfuls of well data of energy recording occurring continuously, certainty of measurement height, working time are grown.

Above-mentioned purpose of the present utility model is achieved in that but pressure sensor, temperature pick up, data acquisition storage circuit, chip interface and control battery etc. partly is assembled in the tubular sealed enclosure, form an independently integral body, self-supply power source.Sealed enclosure has slotted eye in the temperature and pressure transmitter installation place.Be convenient to the pressure and the temperature of direct sensing medium.The CPU control module is by mcu programming each several part power supply in the auto switching circuit on demand in the data acquisition storage circuit, the memory cell data that the many groups of storage record are gathered that circulate in order.After the downhole data acquisition, storage finishes, take out from the down-hole that the electron temperature pressure gauge connects with playback apparatus by interface this memory type, just can read downhole data, finish the test of downhole temperature pressure by playback apparatus.

After the utility model adopts above-mentioned design, the instrument energy consumption is reduced greatly, (reaching 600 hours) adopts big storage capacity circuit to have prolonged the working time, and the many mouthfuls of well data of storage that can circulate have continuously been simplified operating procedure in the test.The slot type structure then is convenient to sense force value really and accurately, reduces measure error.

Fig. 1 is a structure diagram of the present utility model

Fig. 2 is the schematic diagram of the composition of ground playback apparatus

Fig. 3 is the utility model automatic control circuit of power supply schematic diagram

Further set forth the utility model below in conjunction with accompanying drawing.

As shown in Figure 1, but the utility model mainly by sealed enclosure 1, pressure sensor 2, temperature pick up 3, data acquisition storage circuit 4, chip interface 5 control batteries 6 etc. partly form one independent whole.But parts such as pressure sensor 2, temperature pick up 3, data acquisition storage circuit 4, chip interface 5 control batteries 6 all are assembled in the sealed enclosure 1, sealed enclosure 1 adopts fabricated structure, it is an elongated combined type cylindrical tubular body, the place of setting pressure sensor and temperature pick up wherein, leave groove or hole, pressure sensor and temperature pick up only allow pressure sensor pressure tap and temperature pick up temperature probe externally open wide after sealing, directly feel the pressure and the temperature of medium.

In traditional electronic pressure gauge, simple and convenient for what seal, temperature pick up mostly is installed on pressure gauge inside, carries out temperature survey by shell heat conduction.Like this, temperature-sensitive speed slow (reaching more than the 5min), sensitivity is extremely low, accurately actual measurement downhole temperature gradient and each point pulsation well temperature.The utility model adopts similarly shell mechanism (as shown in Figure 1) such as groove or hole, and temperature pick up does not need intermediary's material heat conduction temperature-sensitive like this, but directly contacts with testee (oil in the oil well, the water in the water injection well, the natural gas in the gas well).Pressure sensor only allows pressure tap externally open wide after sealing in addition, has improved the sensitivity and the precision of temperature pick up and pressure sensor so greatly, has realized the accurate test of temperature and pressure.Simultaneously, high sensitivity, the actual test of high-precision temperature also for the manometer pressure self calibration provides a temperature, pressure checking list accurately, have significantly reduced the influence of temperature to pressure testing data, have improved the pressure test precision.

Contain CPU control module, memory cell etc. in the utility model data acquisition storage circuit 4, the CPU control module is a kind of SCM system, promptly by single-chip microcomputer according to need of work, cut off or open each ingredient power supply in the data acquisition storage circuit automatically.Its power supply Automatic Control Theory figure as shown in Figure 3, wherein A is a power supply, B is circuit powers such as measurement, storage, conversion.

Because mode of operation of the present utility model is that single-chip microcomputer is tested according to the programming timetable, this characteristics have determined that pressure, thermometer most time are to be in wait state.At waiting time, in the pressure and temp meter systems, its Sensor section, memory part, logic control part, electric voltage frequency conversion portion do not need work.And single-chip microcomputer also is in sleep state, only has only counter and interrupt unit in work.So at waiting time, put the power supply that the P10 electronegative potential turn-offs all other parts, enter sleep state then by single-chip microcomputer.When after the stand-by period, put high potential by interrupting waking single-chip microcomputer up to P10, to turn on the power switch, give system's other parts power supply, carry out data acquisition.Promptly regularly opening power supply carries out data acquisition, and collection finishes, and system enters wait state again.So periodic duty, this method greatly reduces the power consumption of whole system, forms a super low-power consumption test macro, and system test time is prolonged, among the embodiment, the longest having reached more than 600 hours of testing time.

Contain memory cell in the data acquisition storage circuit 4 of the present utility model, will at every turn the switch on data of test of memory cell are stored in the memory in order, and do not wash away the data that write down previously.Behind common manometry a bite well, necessary playback of data at once, otherwise, when testing for the second time, a bite well data before will losing.And adopt this method, the data in the scene, oil field can many mouthfuls of wells of follow-on test.Playback of data together also in needs has been simplified oil field execute-in-place step so greatly, has improved operating efficiency.

When the utility model uses at the scene, earlier this memory type electron temperature pressure gauge is put into the place of the required test in down-hole with sucker rod or wire rope, after test a period of time, it just will be located the temperature of oil reservoir and pressure and write down at regular intervals once and store, and take out this memory type electron temperature pressure gauge and connect (as shown in Figure 2) with the ground playback apparatus by interface.The ground playback apparatus is made up of computer part 7, data readback part 8, terrestrial interface 9, and it is one and integrates programming, communication, data-storing curve printing, shows the multifunction system of editing.This memory type electron temperature pressure gauge data that just can read the down-hole acquisition, storage by playback apparatus are finished whole test like this.

Claims

1. a high accuracy memory type thermobarometer of measuring oil field downhole temperature pressure is mainly by sealed enclosure (1), pressure sensor (2), temperature pick up (3), data acquisition storage circuit (4), chip interface (5) and can control battery parts such as (6) and form, pressure sensor (2), temperature pick up (3), data acquisition storage circuit (4), chip interface (5) and can control battery parts such as (6) and be assembled in the tubular sealed enclosure (1), independently sealing is whole to form one, separates with the ground playback apparatus.It is characterized in that: the place that sealed enclosure (1) is installed at pressure sensor (2), temperature pick up (3) offers groove or hole; The data acquisition storage circuit is made up of CPU control module and memory cell.

2. memory type thermobarometer according to claim 1 is characterized in that: on the sealed enclosure (1), groove or hole are opened in temperature sensor probe and pressure sensor pressure tap place.