A method of operating wells

 

(57) Abstract:

The invention relates to the oil industry and can find application in the operation of horizontal and inclined oil-producing and injection wells. Provides increased maneuverability depth of the instrument in the borehole. The inventive method includes the descent on the cable depth of the device and its promotion in the horizontal and inclined sections. Before the underlying instrument equipped with a rotation period of armored logging cable, which rotate while pushing the depth of the device. Below the depth of the device include a reversible electric motor with a reducer. Cut logging armored cable attached to the output shaft of the gearbox. Rotation of the segment armored logging cable to perform reverse rotation. The motor includes at slowing the speed of descent of the depth of the device by 5-10% with reverse rotation every minute with an equal number of turns in the forward and reverse directions.

The invention relates to the oil industry and can find application in the operation of horizontal and inclined oil-producing and injection wells.

The known method is too cumbersome equipment used and the duration of operations.

Closest to the invention to the technical essence is a method of operating a horizontal and inclined wells, including the descent on the cable depth of the device and its promotion in the horizontal and inclined sections due to the rigidity of the hoist cable (RF Patent No. 2087929, publ. 20.08.97 - prototype).

The disadvantage of this method is that while pushing the cable deep unit deviates from the direction of the well, against the borehole wall and creates resistance to movement through the borehole.

The invention solves the problem of increasing the maneuverability of the depth of the instrument in the well.

The task is solved in that in the method of operation of the wells, including the descent on the cable depth of the device and its promotion in the horizontal and inclined sections, according to the invention, before the underlying instrument equipped with a rotation period of logging bronirovannom rotation.

Features of the invention are:

1. descent by cable depth instrument;

2. pushing depth of the instrument in the horizontal and inclined sections;

3. the accommodation before the underlying instrument cut logging armored cable;

4. the same with possibility of rotation;

5. rotation with reverse rotation while pushing the depth of the device cut armored logging cable.

Signs 1, 2 are shared with the prototype, signs 3-5 are the distinguishing features of the invention.

The essence of the invention.

During well operation there is a need to control the parameters of its operation. To do this well down deep devices, such as gauges, thermometers, flow meters, etc. Descent of underlying instruments on the cable under its own weight in a vertical borehole, as a rule, does not cause complications. In horizontal and inclined wells descent of underlying instruments on the cable under its own weight can be difficult or even impossible due to the small vertical component of the weight force and complications of passing the depth of the device, i.e. pirania underlying instruments in the wall of the well Ernie movement through the borehole. In the proposed invention solves the problem of increasing the maneuverability of the depth of the instrument in the borehole, exceptions pirania in the wall of the well and minimize resistance to movement through the borehole. The problem is solved as follows.

Below the depth of the device, mounted on the end of the cable features a reversible electric motor with a reduction gear to the output shaft of which is connected segment armored logging cable. Thus, the segment armored logging cable is installed rotatably. When slowing down the speed of descent in the range of 5 to 10% during the descent on the cable deep and pushing in the horizontal and inclined sections cut logging armored cable rotate with reverse rotation. Preferred is equal to the number of revolutions in the forward direction and the reverse rotation in the opposite direction. The number of revolutions per minute of the segment armored logging cable preferably from 30 to 60. Cut logging armored cable select length from 5 to 7 PM as cut logging armored cable is used sections of cables grades KG1-24-90, KG1-50-90. As a reversible electric motor use electrodes the psi.

Complications of passing the depth of the device include a reversible electric motor and rotate the segment armored logging cable with reverse rotation. Thus the free end of the segment armored logging cable finds places with the least resistance to movement of the underlying instrument that promotes depth of the device in a horizontal or inclined portion of the wellbore.

An example of a specific implementation.

In a well with a vertical segment with a length of 1600 m and a sloped segment with a length of 275 m and an angle of inclination to the horizontal of 45°, wireline lower depth thermometer brand TR-341, to the lower end of which is attached reversible motor brand DP-6-130 with gear, to the output shaft of which is connected segment armored logging cable brand KG1-24-90 length of 6 m deep Descent device lead with a speed of 1000 m/H. With the slow descent down to 10% include a reversible electric motor and rotate the segment armored logging cable with a speed of 30 rpm with reverse every minute. The result can be achieved sump wells and measure the temperature around the wellbore.

Use awn into the well.

A method of operating a well comprising the descent on the cable depth of the device and its promotion in the horizontal and inclined sections, the location of the front of the underlying instrument, with the possibility of rotation of the segment armored logging cable and its rotation while pushing the depth of the device, characterized in that below the depth of the device include a reversible motor with gearbox, cut logging armored cable attached to the output shaft, the rotation of the segment armored logging cable to perform reverse rotation, include the motor during deceleration of the speed of descent of the depth of the device by 5-10% with reverse rotation every minute with an equal number of turns in the forward and reverse directions.



 

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FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

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