CN2039733U - Directioning instrument for core drilling in rock - Google Patents

Abstract

The utility model discloses an orientation instrument for core drilling in rock with small caliber, comprising a downhole follow drilling probe, an electrode bar and a ground control circuit. The probe is provided with a measuring device used to measure azimuth angle, a zero line angle, and a rake angle, and a switching device used to control the measuring device to stay in different states (measuring the azimuth angle, the zero line angle and the rake angle, and the locking and stopping). The utility model, which has the advantages of high precision, convenient operation and high reliability, is suitable for the orientation measurement of straight and inclined holes.

Description

Directioning instrument for core drilling in rock

The utility model relates to a kind of direction finder that the control directional drilling is awarded in the construction of small-bore core drilling field that is used for.

" geology and exploration " the 23rd volume the 7th phase (in July, 1987) discloses a kind of pendulum-type direction finder, and the existing problem of this instrument is:

When 1, instrument is worked, with lead sensor is lowered in the drilling rod earlier, keyway on the mule shoe guide is fallen on the directional bond of orientation joint, this method of operating, need according to directional bond top rod length with whether be lowered to conductor length consistent, and time fashionable sensation, determine whether the mule shoe guide keyway goes into key, therefore not only operation inconvenience, and do not go into the key orientation that makes the mistake because of guide shoe keyway reality easily;

2, the ground instrument circuit is simple, can't reading, thereby orientation accuracy is not high, even produce directed misjudgment;

3, this pendulum-type direction finder can only use in the inclined hole of inclination angle more than 3 °, can't be used for the straight hole orientation.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of orientation accuracy height is provided, and is easy and simple to handle reliable, is applicable to direction finder straight, the small-bore core drilling of inclined hole.

The direction finder that the utility model proposed, it is made up of with drill pipe, electrode bar and control circuit the down-hole.Be equipped with in the inserting tube and be used to measure azimuth, zero line angle, and structure is the measurement mechanism of magnetic compass compression, wherein azimuth compass resistance and zero line angle compass resistance series connection back is as gage beam, form two groups of wheatstone bridges with the Ground Control line resistance, bridge arm ratio share a wirewound potential meter with coaxial dial than arm and gage beam, one diametrical connection of electric bridge is gone into galvanometer, and another diagonal angle inserts dc source.When the compass resistance of gage beam is distinguished short circuit part resistance, then bridge balance is subjected to corresponding destruction, the galvanometer reading produces deviation, by regulating the coaxial resistance of dial, make electric bridge reach balance again, therefore from dial, can read the number of degrees that the azimuth becomes the zero line angle, two angle value additions, be zero line on the inserting tube be marked in the hole towards the angle, thereby reach the purpose of oriented detection.

Below in conjunction with accompanying drawing direction finder of the present utility model is described in detail.

Direction finder of the present utility model comprises that the down-hole is with drill pipe, electrode bar and three ingredients of control circuit.

Referring to Fig. 1, inserting tube is socketed to form mutually by four layers of concentric tube (dividing A, B, C, D from outside to inside).

Referring to Fig. 2, the A pipe by last catcher 1, coupling sleeve 2, internal spline joint 3, outer tube 4, take over 6 down and form, and be coupled to each other by screw thread and be integral.Upper and lower catcher car has screw thread, can be respectively with drilling rod with lead oblique drilling tool and connect, the reverse valve 5 of unidirectional water flowing is housed in the following catcher, the B pipe is between reverse valve and internal spline joint, leave annular gap between A, B pipe, to guarantee to have enough cross-sections of river, the B pipe connects with A pipe internal spline joint by spline.

Referring to Fig. 3, the B pipe is made up of electrode tip holder joint 10, inside and outside spline joint 11, outer tube 12, shockproof joint 13, and is coupled to each other by screw thread and is integral.Filling the sealing chamber 8 of waterproof insulation liquid and the electrode tip holder 7 of water lily shaped structure connects with the electrode tip holder joint by clamp nut 9, insulation sleeve 14 is arranged between electrode tip holder and the joint, the waterproof insulation flowing fluid ratio is great, water insoluble, it can be well-separated electrode and water, realizes that electrode connects, this iknsulating liquid can adopt commercial carbon tetrachloride liquid, require proportion generally 1.59～1.632, best proportion is 1.6311, and the dielectric strength general requirements is 500M Ω/mm ²The C pipe and is managed with B by spline and to be connected in B pipe between shockproof joint and the inside and outside spline joint.

Referring to Fig. 4, the C pipe by external splines joint 15, on cut outer tube 36, cut outer tube 31 down, shockproof joint 28 is formed, and respectively by electrode tip holder 17, go up dead head 34, insulation sleeve 27 and holding screw and be connected into one.Be equipped with in the C pipe and be used for the conversion equipment that the control survey device is in different conditions (interception angle, survey zero line angle, locking stop), said conversion equipment can be by motor 16, gearbox 18 and shaft coupling, and the helical compression formula transmission mechanism of tri-color ball-point pen formula is formed, motor preferably adopts starting resistor 1.5V-12V, rated current is at 30～200mA, it is the micro-gearbox of 5000:2 that the minisize dc magneto of rotating speed 500r/min, gearbox preferably adopt gear ratio; Output at gearbox is equipped with ratchet mechanism 19, to guarantee that screw-drive mechanism 20 does not produce reverse rotation; Symmetry is equipped with two adjustable pressure bars 21 on the screw-drive mechanism, and by platen 22 and connecting rod 23 compression springs 35, retainer moves down in the promotion, following retainer 25 be screwed under cut in the outer tube; Be contained in top 33, spring 30 and regulating block 29 are housed down on the following dead head 26 in the insulation sleeve, zero line angle compass resistance 32 is screwed on dead head down, the D pipe in the C pipe on dead head and time top between.

Referring to Fig. 5, the D pipe by framework 39, go up dead head and top 38 and down top dimple 53 and insulation sleeve 51 form, and be integral by screw attachment.The following push-plate 52 that last push-plate 37 is equipped with contact chip 54 by connecting rod 48 compression springs 55 promotions of two symmetries moves down; The compass body 46 that orientation electrical coil resistance 57 and weight 47 are housed is supported in the framework by jackscrew, needle 44 and needle seat 58 that contact chip 45 is housed are by the top compass body top that is supported on, the top compass body and weight and arc of passing tried to stop people from fighting each other and 60 connected with nut 61, between the top and compass spring 59 is housed, in the middle part of trying to stop people from fighting each other, arc has groove, support bar 63 on one end and the supporting disk 56 is hinged, and be connected the location with supporting disk by extension spring 62, be connected (referring to Fig. 6) by extension spring 64 with cross bar 49 on being contained in connecting rod 48; Be screwed eccentric lead 50 in the bottom of framework, with guarantee framework towards stability.

Between A, the B pipe, shock-absorbing spring all is equipped with between B, the C pipe and the upper and lower part between the C, D pipe, to guarantee that measurement mechanism does not damage because of the drilling tool judder; A, B, C pipe adopt splined, have both reduced the vibration of inserting tube, have guaranteed the uniformity of three pipe zero lines again; When measurement mechanism is in non-measurement state, make up and down by conversion equipment that retainer firmly clamps the D pipe, guaranteed that measurement mechanism is not subjected to drilling tool axial vibration Li with rotation leaves the destruction of mental and physical efforts.

The utility model inserting tube adopts four layers of concentric tube to be socketed to form mutually, with drilling rod with lead oblique drilling tool and connect, bears the pressure of the drill and moment of torsion by the A pipe, reaches the purpose with brill; Leave annular gap between B pipe and the A pipe, guaranteed that flushing liquor has enough cross-sections of river, the B pipe in pipe, fills damping oil with C pipe and D duct occlusion in the pipe, can play damping and lubrication; The sealing chamber of B pipe upper end is equipped with waterproof insulation liquid, it can be well-separated electrode and water, when needing to measure, to be connected to the electrode bar of cable by the drill pipe bore input, insert electrode tip holder with the electrode bar deadweight, can realize easily that the down-hole inserting tube is communicated with the Ground Control circuit, the conversion equipment in managing by C control survey device respectively is in azimuth and zero line angular measurement state.Before inserting tube uses, orientation resistance zero point and zero line angle resistance zero point and inserting tube zero line mark are in a straight line, in the time of in inserting tube is lowered to boring, needle still is still on the level of magnetization of north and south, and resistance relative needle at zero point in orientation produces an angular difference, at this moment if during the last sub-resistance of short circuit azimuth compass, can record actual orientation angles; Zero line angle resistance rotates with inserting tube, therefore resistance zero point and inserting tube zero line mark are still point-blank, but contact chip has rotated an angle with push-plate Relative Zero line angle resistance under the D pipe zero point, so the part of short circuit zero line angle compass resistance, can record actual zero line angle.With azimuth, the addition of zero line angular measurement value, can obtain the inserting tube zero line be marked in the hole towards the angle, thereby reach the purpose of orientation survey.

Electrode bar of the present utility model is by cable connector 69, barred body 68 and be equipped with two groups and form by the annular electrode of insulation sleeve 66 mutually insulateds and the contact head 65 of electrode cores 67.Distinguish conducting conversion equipment and measurement mechanism by two groups of electrodes on the contact head.

The control circuit of the utility model direction finder mainly comprises: two groups of wheatstone bridges that orientation resistance of connecting mutually in ground line resistance and the down-hole inserting tube and zero line angle resistance are formed, and bridge arm ratio share a wirewound potential meter with coaxial dial (coil the high scale value and can reflect azimuth and zero line angle) than arm and gage beam; Also have measuring switch, changeover switch, cable compensated regulator, voltage regulator in addition and respectively as two milliammeters of state indication and bridge balance indication.

Direction finder of the present utility model, owing to adopt measurement mechanism and two groups of wheatstone bridge balanced bridge penalty method measurement circuitry of magnetic compass compression structure, and the easy device that conducts, thereby well logging, directed easy fast, accurately and reliably, reading is directly perceived, can be used for straight, inclined hole orientation survey.

Can also load onto the resistance 42 that is used to measure dip angle of hole in the utility model inserting tube, resistance can be fixed on the seat 43 that places D pipe magnetic compass top, the pendulum 40 of band contact chip 41 is equipped with in the top of seat, contact with resistance by the contact chip on the voussoir extruding pendulum on the push rod, inclination angle resistance is with after azimuth resistance, zero line angle resistance are connected, as gage beam, form three groups of wheatstone bridges with the Ground Control line resistance, like this, the direction finder one-time detection can obtain the numerical value at bore direction and inclination angle.

The utility model direction finder and deflecting drilling tool or the supporting use of directional coring apparatus, can realize in the small-bore core drilling straight inclined hole directed well straightening, directional inclination, beat directed branch hole or orientation is got functions such as core.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the utility model inserting tube assembling schematic diagram.

Fig. 2 is an A pipe sectional view in the utility model inserting tube.

Fig. 3 is a B pipe sectional view in the utility model inserting tube.

Fig. 4 is a C pipe sectional view in the utility model inserting tube.

Fig. 5 is a D pipe sectional view in the utility model inserting tube.

Fig. 6 is an E-E sectional view among Fig. 5.

Fig. 7 is the utility model electrode bar sectional view.

Claims (8)

1, a kind of small-bore core drilling direction finder, it is characterized in that it comprises that the down-hole is with drill pipe, electrode bar and Ground Control circuit, inserting tube is equipped with and is used to measure the azimuth, the zero line angle, and structure is the measurement mechanism of magnetic compass compression, and the control survey device is in different conditions (interception angle, survey the zero line angle, locking stop), and structure is the conversion equipment of the helical compression transmission of tri-color ball-point pen formula, with with electrode bar butt joint so that the electrode tip holder that down-hole inserting tube and Ground Control circuit are communicated with, two groups of wheatstone bridges that control circuit is made up of orientation resistance of connecting mutually in ground line resistance and the inserting tube and zero line angle resistance drift angle, bridge arm ratio share a wirewound potential meter with coaxial dial (coil the high scale value and can reflect azimuth and zero line angle angle numerical value) than arm and gage beam.

2, according to the described direction finder of claim 1, it is characterized in that inserting tube is socketed to form (dividing A, B, C, D from outside to inside) mutually by four layers of concentric tube, the A pipe by last catcher 1, coupling sleeve 2, internal spline joint 3, outer tube 4, take over 6 down and form, and be integral by thread connection, the reverse valve 5 of unidirectional water flowing is housed in the following catcher, the B pipe and leaves annular gap with the A pipe in A pipe between reverse valve and the internal spline joint; The B pipe is by electrode tip holder joint 10, inside and outside spline joint 11, outer tube 12, shockproof joint 13 is formed, and be integral by thread connection, the electrode tip holder 7 that fills the sealing chamber 8 of waterproof insulation liquid and water lily shaped structure connects with the electrode tip holder joint by clamp nut 9, and the C pipe is in B manages between shockproof joint and the internal spline joint; The C pipe is by external splines joint 15, go up and cut outer tube 36, under cut outer tube 31, shockproof joint 28 is formed, and be connected into one by electrode tip holder 17, last dead head 34, insulation sleeve 27 and holding screw respectively, the conversion equipment of being made up of the helical compression formula transmission mechanism of micromachine 16, micro-gearbox 18 and tri-color ball-point pen formula is installed in the C pipe, be fixed with the following dead head 26 of zero line angle compass resistance 32 and top 33 be contained in the insulation sleeve down, the D pipe in the C pipe on dead head and descend top between; The D pipe is by framework 39, last dead head and top 38, and following top dimple 53 and insulation sleeve 51 compositions, and be integral by screw attachment, in the C pipe at D pipe two ends retainer 24 and following retainer 25 are housed, last retainer is by connecting rod 23, platen 22 is connected with screw mechanism 20 with adjustable pressure bar 21, the following push-plate 52 that push-plate 37 is equipped with contact chip 54 by 55 promotions of connecting rod 48 compression springs on the D pipe moves down, the compass body 46 that orientation electrical coil resistance 57 and weight 47 are housed is supported in the framework by jackscrew, needle and the needle seat 58 of contact chip 45 is housed by the top top that is supported on compass body, the top compass body and weight and arc of passing tried to stop people from fighting each other and 60 connected with nut 61, in the middle part of trying to stop people from fighting each other, arc has groove, support bar 63 on one end and the supporting disk 56 is hinged, and be connected the location with supporting disk by extension spring 62, be connected with cross bar 49 on being contained in connecting rod 48 by extension spring 64, eccentric block 50 be housed in the bottom of framework.

3, according to the described direction finder of claim 2, it is characterized in that it is 1.6311 that sealing chamber inner waterproofing iknsulating liquid adopts best proportion, dielectric strength is 500M Ω/mm ²Carbon tetrachloride liquid.

4,, it is characterized in that electrode bar is by cable connector 69, barred body 68 be equipped with two groups and form by the annular electrode of insulation sleeve 66 mutually insulateds and the contact head 65 of electrode cores 67 according to the described direction finder of claim 3.

5,, it is characterized in that the Ground Control circuit also comprises measuring switch, changeover switch, cable compensated regulator, voltage regulator and respectively as 2 milliammeters of state indication and bridge balance indication according to the described direction finder of claim 4.

6, according to claim 2 or 5 described direction finders, it is characterized in that being equipped with in the D pipe resistance 42, the resistance that are used to measure dip angle of hole and be fixed on the seat 43 that places D pipe magnetic compass top, the pendulum 40 of band contact chip 41 is equipped with in the top of seat, contacts with resistance by the contact chip on the voussoir extruding pendulum on the push rod; Inclination angle resistance is connected the back as gage beam with orientation resistance, zero line angle resistance, form three groups of wheatstone bridges with the Ground Control line resistance.

7,, it is characterized in that between A, the B pipe that shock-absorbing spring all is equipped with between B, the C pipe and the top and the bottom between the C, D pipe according to the described direction finder of claim 2.

8,, it is characterized in that between A, the B pipe that shock-absorbing spring all is equipped with between B, the C pipe and the top and the bottom between the C, D pipe according to the described direction finder of claim 6.

Images