Device for well deep sampling

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry, in particular, to procedure of fluid and gas sampling in wells. Device consists of cylindrical casing, where the following components are installed: sample receiving chamber of suction type with separating piston, ballast chamber, module of control and information exchange interface. The following components are introduced into cylindrical casing between sample receiving and ballast chambers, leakproof relative to environment, serially connected downstream sample receiving chamber: uncontrolled adjustable reduction gear of fluid pressure and hydraulic relay controlled by electric current that is supplied from module of control and information exchange interface, which uses elastic mechanic oscillations excited on device body and noise-immune coding of information for control of device operation, and also for communication to personal computer.

EFFECT: increase of device operation reliability, monitoring of sample receiving chamber opening and time of its filling with fluid, expansion of equipment operation thermobaric range, provision of sample transport safety.

5 cl, 1 dwg

 

The invention relates to the oil and gas industry, in particular to techniques for sampling liquid and gas wells.

Famous sampler [1], consisting of a hydraulic actuator, gettimer, mechanism of opening of the sampling chamber value, sampling chamber value and the ballast chamber. The disadvantages of the design are:

first, a small interval of time expires gettimer;

secondly, the strong dependence of the time of gettimer from external temperature and pressure;

thirdly, the lack of controlling the filling of liquid or gas sampling chamber value.

The presence of capillary tubes and the flow of oil through it in this design did closeprogram the sampling time in the borehole due to the change in the viscosity of the used oil under the action of thermobaric conditions of the external environment. In addition, this low-tech due to the clogging of the capillary tube.

After tripping hydrocele liquid rushes in prosoprano the camera. The degassing of the liquid is prevented by the presence of oil under the piston chamber, which expires in similar capillary tube in the ballast chamber. The rate of flow is established experimentally, and therefore, the degree of rangatiratanga liquid samples it is impossible to establish that affects repeat the TB results in the analysis of samples.

Famous sampler [2], consisting of hydraulic, electronic module, mechanism of opening of the sampling chamber value, sampling chamber value. The disadvantages of the design are:

first, the design complexity, due to the presence of a large number of nodes and technically complex parts;

secondly, the lack of controlling the filling of liquid or gas sampling chamber value;

third, restrictions on hydraulic drive for the operating pressure range.

In fact, this sampler follows the ideology of sampling described in [1]. Instead of gettimer electric timer is used, and the hydraulic actuator is equipped with a controllable opening mechanism of the channel expires oil. Still no control over the opening of the sampling chamber value. Described in [2] control methods only indirectly can yield results. First, the presence of current in the actuator does not always speak about his healthy state. Secondly, the pressure sensor may capture only a partial movement of the piston of the hydraulic drive, which will not lead to the opening of the sampling chamber value.

The absence of a control process fill fluid sampling chamber value does makes the process meaningless. Firstly, there is the degassing of the sample due to the lack of ballast camera with hydrocortisone at least in the form of capillary tubes. The second is x, because of the strong pressure drop in prosoprano chamber is a strong blow of the piston, which can lead to deformation of the structure, and consequently, affects its performance properties.

In any mechanism there are capacity limits and by analogy with the device [2] it is necessary to use interchangeable components to operate over a wide pressure range.

An object of the invention is to improve the reliability of device operation, the control of opening and the time of filling fluid sampling chamber value, the expansion temperature range of operation of the equipment without the use of interchangeable parts, ensuring the safe transport of samples were taken.

The technical problem is solved by the proposed device for sampling fluid, consisting of the suction chamber, the ballast chamber (the chamber at atmospheric pressure) and located between them managed stabilizer pressure drop.

What's new is that:

a) does not require mechanical cock to its original state governing bodies, which during operation are motionless;

b) manage to combine the control for the opening of the sampling chamber value and control over the time of its completion and implementation of this control is not indirectly, but directly at the sensor level;

C) controlled stabilizer is adeniya pressure, consisting of a series unmanaged custom gearbox fluid pressure and managed hydrocele electric current seamlessly within specified through the computer time interval to fill prosoprano the camera regardless of the temperature and pressure used in the oil system;

g) in prosoprano the camera for the first time introduced under pressure by a dividing piston, preventing the filling of its breakdown;

d) in prosoprano chamber is a pressure sensor which is connected to the secondary circuits after removing the sampler from the borehole with the aim of continuously monitoring the pressure of the sample in the chamber during transportation and delivery of appropriate signals in case of seal failure or exceeding the permissible limit for the pressure in the chamber.

The drawing shows the design of the device, where 1 is the head of the fastening device to the wire or geophysical cable, 2 - spring, 3 - filter 4 - axle seat sealing cone, 5 - sealing cone, 6 - separating piston, 7 butter, 8 - case sampling chamber value, 9 separating the piston from the pressure sensor in prosoprano chamber 10 to the pressure sensor, 11 - pressure sensor interface, 12 - stop the puck, 13 - filter 14 - spring, 15 - ball, 16 - protective tube, 17 - unmanaged custom ed is ctor fluid pressure, 18 - managed hydrocele electric shock, 19 - case ballast chamber, 20 gauge, 21 - protective tube, 22 - case control electronics, 23 - management module and interface information exchange, 24 - batteries, 25 - seasonthey, 26 - lower shank.

The operation principle of the sampling wells.

On the surface of the earth staff prepares the device.

First initialize the control module via a personal computer to work on a given program, taking into account the presence (absence) in linking multiple devices sampling with subsequent assignment of the upper device status "main", and other devices "slave".

Thus seasonthey 25 by the elastic mechanical waves propagating through the device, and error-correcting encoded information, allows you to control the sampling of several similar units in the layout.

In the ballast chamber is checked no oil by the extraction tube 21 with the subsequent installation in place. In the suction chamber, the piston 6 is given in the upper position and built pressure in the oil pumped through the valve 15. The pressure is selected at 10% above the wellhead pressure issleduyuschimi.

After setting the device at the sampling point on command from the control module begins the process of transmission oil from the suction chamber in the ballast. Unmanaged custom gearbox fluid pressure, designed for small expenses, supports, slaborebristaya largest outlet pressure when a large change in the input.

By periodically switching on and off managed hydrocele 18 electric current and control the oil level on the testimony of the level sensor 20 a smooth controlled process time. After a process of flowing oil pressure at the inlet unmanaged custom gearbox fluid pressure is zero.

Sources of information

1. Copyright certificate EN No. 2078206, IPC 6 EV 49/08, publ. BI # 10 of 27.04.1997,

2. Copyright certificate EN No. 2280160, IPC 6 EV 49/08, publ. BI No. 20 dated 20.07.2006,

1. Device for selection of the deep samples from wells, consisting of a cylindrical body in which probationa Luggage suction type with a separating piston, the ballast chamber, the management module and interface exchange of information, characterized in that the cylindrical housing between prosoprano and ballast chambers sealed from the external environment, introduced sequentially connected, the following from the sampling chamber value, n is a managed custom gearbox fluid pressure, hydrocele, a controlled electric current coming from the control module and interface information exchange using elastic mechanical vibrations induced on the device, and error-correction coding information to control the operation of the device, as well as for communication with a personal computing machine.

2. The device according to claim 1, characterized in that probationa Luggage under the separating piston is made with the possibility of creating excess pressure.

3. The device according to claim 1, characterized in that the unmanaged custom gearbox fluid pressure, hydrocele controlled electric shock, do not require reloading.

4. The device according to claim 1, characterized in that the unmanaged custom gearbox fluid pressure, hydrocele controlled electric current is arranged to control the beginning and the fill rate sampling chamber value, given the pressure and temperature of the environment through the management module and interface information exchange, based on the direct method of measuring the level of selected samples.

5. The device according to claim 1, characterized in that it is configured to control the pressure in prosoprano chamber without loss of pressure.



 

Same patents:

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EFFECT: increased simplicity, provision of high-quality mixing of sample product and increased sample reliability.

3 dwg

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EFFECT: increased operational reliability and prevention of oil sample degassing due to improved air-tightness of sampling device interior.

2 cl, 1 dwg

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