CN2076601U

CN2076601U - Continuous slope measurer

Info

Publication number: CN2076601U
Application number: CN 90220918
Authority: CN
Inventors: 冯祥正
Original assignee: XI'AN PETROLEUM EXPLORATION INSTRUMENT GENERAL FACTORY
Current assignee: XI'AN PETROLEUM EXPLORATION INSTRUMENT GENERAL FACTORY
Priority date: 1990-09-19
Filing date: 1990-09-19
Publication date: 1991-05-08

Abstract

The utility model discloses a continuous slope measurer, which is composed of a downhole instrument and a ground instrument, wherein, the sensor of the downhole instrument is composed of an external ring, an inner ring, a compass, an azimuth angle potentiometer, a slope angle potentiometer, etc. The utility model can continuously measure the azimuth angle and the slope angle of an oil well barrel, and can record values by a recorder. The existing point-type slope measurer can be replaced by the utility model, the measuring speed can be increased, and the utility model adopts combination measurement. The utility model is mainly used in geophysical exploration of petroleum wells.

Description

Continuous slope measurer

The utility model belongs to the geophysical exploration field, is specially adapted to the oil exploration well logging.

The inclinometer that uses in the geophysical prospecting for oil well logging all is a survey formula at present.Survey a point every certain well section, artificial reading, timeliness is low, and human factor is big.During current diamond oil well, all there is higher requirement at the verticality and the azimuth of pit shaft, deviated directional drilling also bores more and morely gradually.It is very important that continuous measurement pit shaft gradient and azimuth seem, is badly in need of a kind of continuous inclinometer.

The purpose of this utility model provides a kind of continuous inclinometer, and it can measure the gradient and the dip azimuth angle of the pit shaft that gets out in the earth's crust continuously, apace.And use existing method and apparatus and be recorded on the record-paper.

The utility model is realized as follows.Continuous inclinometer of the present utility model is made up of ground instrument and downhole cartridge two parts, has comprised measuring circuit and power supply etc. in the instrument of ground, and downhole cartridge is made up of Aided Machine parts, auxiliary circuit and sensor.

Sensor is constructed as follows: by the outer shroud that constitutes gimbal and the interior ring that have eccentric weight to point to, the azimuth potentiometer that drags by compass of sliding end in being loaded on the ring, and the resistance dish be loaded in ring go up the angle of slope potentiometer that sliding end is fixed on the outer shroud and form jointly.Outer shroud is a rectangle, sleeve outwards is equipped with at its minor face center, finally sensor is installed on the downhole cartridge shell by sleeve, it is horizontal that axle inwardly is equipped with at its center, long limit, on a side plane of outer shroud, eccentric weight is housed, be contained in the both sides of ring in the bowl-type within the outer shroud, be through on the transverse axis, the upper and lower both sides of ring are equipped with vertical pivot in passing, the top of ring in the azimuth potentiometer is contained in, the vertical pivot upper end is passed from its center, and sliding end is fixed on the vertical pivot upper end, also fixing the compass that bar magnet and bar magnet frame are formed on the vertical pivot, the compass plane is vertical with vertical pivot.On the side of ring, transverse axis passed from its center in the resistance dish of angle of slope potentiometer was installed in, and sliding end is fixed on the transverse axis.

On the side plane of outer shroud eccentric weight is housed.When downhole cartridge was vertically placed, eccentric weight was inoperative, and outer shroud stops in rotation process at random.In the original assembling process of sensor, the gap of the resistance dish of azimuth potentiometer to be aimed at compass refer to north point, the resistance readings of establishing at this moment is zero, and energising back measuring voltage also is " 0 ", and deflection is decided to be " 0 ".When the downhole cartridge run-off the straight, eccentric weight drives sensor and rotates, and stable during to the center of gravity minimum point, at this moment the resistance dish of outer shroud, interior ring, potentiometer all has a permanent position under this azimuth.Bar magnet at compass is subjected under the drive of geomagnetic field action, and the sliding end of azimuth potentiometer is still kept position, absolute finger north, and at this moment the potentiometer output voltage values is corresponding tool-tilt azimuth at this moment.Along with downhole cartridge moves in well, the azimuthal variation of downhole cartridge, the output voltage values that reflects azimuthal azimuth potentiometer is also along with variation.Note this voltage change curve, just can be converted into the azimuthal variation curve.

Also have the angle of slope potentiometer in aforementioned, the bowl-type base of ring was forever in minimum point in the whole device comprehensive gravity centers during design on the interior ring made, and interior ring is in normal level state.When downhole cartridge is vertically placed, outer shroud and in ring all be in the straight state of tree, the sliding end of establishing angle of slope potentiometer at this moment is " 0 " with the relative position between the resistance dish, does not promptly have inclination.When the downhole cartridge run-off the straight, interior ring is vertical forever under action of gravity, the state when the resistance dish of the angle of slope potentiometer of installing on it still keeps " 0 ".And its sliding end makes sliding end change the arc of an angle of slope size on the resistance dish along with tilting simultaneously under the overall drive of transverse axis, outer shroud and downhole cartridge.Certainly also corresponding voltage changes, and reads this magnitude of voltage, promptly tries to achieve the angle of slope.

Downhole cartridge is subjected to the inclination of the effect perception pit shaft of pit shaft must occur deflection and angle of slope simultaneously.The two is converted into magnitude of voltage simultaneously, handles through electronic circuit, is got off by recording device records.Downhole cartridge moves the full curve in two expression instruments (being pit shaft) inclination and orientation that just draws continuously in pit shaft.

Advantage of the present utility model is that it can measure continuously that the pit shaft each point tilts and the continuous change curve in orientation.Measuring speed is fast, can use self-recording unit, has overcome the shortcoming of some survey formula inclinometer fully.

Below in conjunction with accompanying drawing the utility model embodiment is described further:

Fig. 1 is the utility model downhole cartridge cut-away section assembling drawing.

Fig. 2 is the sensor side view.

Fig. 3 is interior ring front view.

Fig. 4 is interior ring vertical view.

Fig. 5 is the compass front view.

Fig. 6 is the compass vertical view.

With reference to figure 1, downhole cartridge shell (15) lining of garden tubular is installed with sensor (1), the ragged edge of sensor (1) is the outer shroud (14) of rectangle, major axis along outer shroud (14) outwards is equipped with sleeve (17), sleeve (17) finally is fixed on the shell (15) on the one hand, hold (16) by the longitudinal axis on the other hand and be installed on the outer shroud (14), like this, outer shroud (14) serves as that axle freely rotates with sleeve (17).The lateral view structure of outer shroud (14) as shown in Figure 2, wherein shown eccentric weight (23), on long limit, inherence, respectively adorn the transverse axis (9) of one piece of weak point along the short-axis direction of outer shroud (14), by bearing (8) interior ring (21) is installed on the transverse axis (9), interior ring (21) is a bowl-type ring, and its shape as shown in Figure 3 and Figure 4.Transverse axis (9) inserts from two sides of interior ring, and interior ring (21) can freely swing on transverse axis (9).

It is following to pass going up of interior ring (21), by means of the decorative pearl on top of an official cap (3) and bearing (4) (bearing (4) about both sides respectively have one) vertical pivot (5) is installed on the interior ring (21).Vertical pivot (5) lower end is following equal with interior ring (21), the upper end of vertical pivot (5) is exposed one section from the top of interior ring (21), vertical pivot (5) passes going up of interior ring (21) compass is installed on the following interlude, the detailed structure of compass is seen Fig. 5 and Fig. 6, mainly form by bar magnet frame (6) and bar magnet (7), bar magnet (7) pierces in the groove of bar magnet frame (6) as shown in Figure 5 and Figure 6 like that, and the bar magnet of present embodiment (7) is formed by two.And vertical pivot (5) vertically pierces into bar magnet frame (6), and when downhole cartridge was in running order, compass kept level.

With reference to figure 3, there is one section concave portions the top of interior ring (21), and the resistance dish of azimuth potentiometer (10) is fixed thereon, and the top of vertical pivot (5) is just passed from the center of potentiometer (10).On the top of vertical pivot (5) brush assembly of electric (19) is installed, and the sliding end of azimuth potentiometer (10) is connected with brush assembly of electric (19).By terminal plate (11) and brush (12) sliding end of potentiometer (10) is connected with treatment circuit again.

With reference to Fig. 1, the resistance dish of angle of slope potentiometer (20) is installed on the side of interior ring (21), and transverse axis (9) is just passed from the center of the resistance dish of potentiometer (20), the sliding end of potentiometer (20) then is fixed on the transverse axis (9), thereby the resistance dish of angle of slope potentiometer (20) is gone up swing and relative slip corresponding to interior ring (21) at transverse axis (9) with sliding end.Rely on slip ring assembly (18) and brush (12) outwards to draw circuit connection from sensor (1).Dress respectively has an eccentric weight (23) on the minor face of outer shroud (14), their shape and position as shown in Figure 2, all on the plane, the same side of outer shroud (14).Can pin interior ring (21) by screw (2) and the locking device (22) that is installed in interior ring (21) bottom, bad to prevent in transportation sensor (1) shake.

The sensor (1) mixes auxiliary machinery and auxiliary circuit is formed downhole cartridge, and downhole cartridge and ground instrument combine and constitute continuous inclinometer of the present utility model.

Claims

1, a kind of continuous inclinometer, form by downhole cartridge and ground instrument, it is characterized in that the sensor (1) in the downhole cartridge is by the outer shroud that constitutes gimbal (14) that has eccentric weight to point to, interior ring (21), be loaded on the azimuth potentiometer (10) that the sliding end on the interior ring (21) is dragged by compass, and the resistance dish is loaded on the angle of slope potentiometer (20) that sliding end on the interior ring (21) is fixed on the outer shroud (14) and forms.

2, continuous inclinometer according to claim 1 is characterized in that outer shroud (14) is a rectangle, and sleeve (17) outwards is equipped with at its minor face center, inside and outside its center, long limit transverse axis (9) is housed, and eccentric weight (23) is housed on the one side plane.

3, continuous inclinometer according to claim 1 is characterized in that interior ring (21) is a bowl-type, and its both sides are through on the transverse axis (9), passes the upper and lower limit of interior ring (21) vertical pivot (5) is installed.

4, according to claim 1 or 3 described continuous inclinometers, it is characterized in that there is the resistance dish of azimuth potentiometer (10) interior ring (21) top, and the upper end of vertical pivot (5) is passed from the center of resistance dish, and potentiometer (10) sliding end is fixed on the upper end of vertical pivot (5).

5, according to claim 1 or 3 described continuous inclinometers, it is characterized in that being fixed with the compass of forming by bar magnet frame (6) bar magnet (7) on the vertical pivot (5), compass plane and vertical pivot (5) are perpendicular.

6, continuous inclinometer according to claim 1, it is characterized in that being fixed with on the side of interior ring (21) the resistance dish of angle of slope potentiometer (20), and transverse axis (9) is just passed therethrough, and the sliding end of potentiometer (20) is fixed on transverse axis (9) end.