CN2181565Y - Microelectrode powered calliper logging device - Google Patents

Abstract

The utility model relates to a microelectrode powered pushing device for measuring the diameter of an open hole. The utility model is characterized in that both ends of a casing 18 are provided with a motor and a center pole 19; two circular slide blocks (14, 17) and a cylinder 8 are arranged between the motor and the center pole 19 in the casing. Four potentiometer cylinders 6 and a piston 9 are penetrated in the cylinder; the four potentiometer cylinders 6 are sheathed with springs 7 which are uniformly distributed. Four two-diameter poles 15 are penetrated into the two slide blocks, and the two-diameter poles 15 are sheathed with springs 16 which are uniformly distributed; the poles are hinged with a supporting pole 13 which passes through an axial groove on the casing. The tail end of the supporting pole is hinged with an arm pole 12, one end of the arm pole is hinged on the casing, and the head of the arm pole is in contact with the piston 9 in a cam mode. Two supporting arms (20, 21) and the slide block 17 form a pushing system with six arms and five sets through a central pole; the pushing system is controlled by the motor. As a result, the measuring precision is enhanced.

Description

Microelectrode powered calliper logging device

Oil is the finishing drilling open hole well, carry out the measurement of hole diameter and formation resistivity, is the important physical parameter that decides down step well cementation and formulate oil production technology, it be well logging must survey project.In recent years, introduction along with external logging technique, hole diameter microelectrode backup instrument is to utilize a motor to promote two support arms of a cover backup system at present, draw in when going into the well, during measurement two arms are pushed open, measuring pad is abutted on the borehole wall, because hole diameter is to utilize two open angles of symmetrical push arm to control a pull bar potentiometer, because of well radius variations is irregular, the ratio of precision of measuring hole diameter is lower, can not satisfy the requirement of the complete standard of well-log information.

The utility model purpose is to avoid the deficiency of above-mentioned background technology, measures the hole diameter microelectrode power pushing device that leg reaches the raising certainty of measurement and provide a kind of to increase.

The utility model purpose can reach by the following technical programs: in the end of original round casing 18 motor 1 is housed, motor promotes by switching mechanism can be along the power transmission arm-tie 2 that slides on the groove of housing two side, drives the opening of two support arms (19,20,21,22) of a cover backup system again by arm-tie.The utility model be between the center-pole 19 of above-mentioned backup system and the motor 1 in be with in the housing slidably and between two round sliders (14,17) and the cylinder 8 of spacing, plug 3 is housed between cylinder and the motor, sealed rubber ring 4 is housed between plug and cylinder.Cylinder 8 axially on have uniform 4 two footpath axial holes, motor side is inserted with potentiometer cylinder 6 and the piston guide rod that is connected for the particle size hole, piston 9 passes hole, thin footpath; Sleeve spring 7 on each potentiometer cylinder 6, an end of spring is supported by piston guide rod, and the other end is by cover [5 shutoff on the potentiometer cylinder, and ring flat-plate is screwed on cylinder 8 ends.The round casing that two round sliders (14,17) are located has axial groove, and arm-tie 2 usefulness screws are crossed groove and fixed slide block; Thick, thin 4 holes of uniform coaxial inner conductor are arranged on two slide blocks, are gross porosity on the slide block 14, insert two footpath bars 15 from gross porosity, are being with spring 16 between two slide blocks on thin bar; Be hinged with the pole 13 of passing the round casing axial groove on the particle size bar, the terminal hinge joint of pole is just like the well logging footpath armed lever 12 like the umbrella leg, and armed lever one end is hinged on the housing 18, and the top ends of each armed lever is with the terminal mutually transmission contact of cam with piston 9.Two support arms (20,21,22) are slidingly connected by core bar and slide block 17.

The utility model and above-mentioned background technology have following effect: owing to increase independently backup system of quadruplet, each leg drives a pull bar potentiometer separately, can improve the precision of measuring hole diameter.

Fig. 1 is the utility model complete section diagrammatic sketch;

Fig. 2, the 3rd, A-A, B-B sectional drawing on Fig. 1;

Fig. 4 is the pore size distribution figure that wears potentiometer cylinder 6 on Fig. 1 cylinder 8;

Fig. 5 is Fig. 1 upper member (3～9) assembling amplification profile;

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

By shown in Figure 1, original hole diameter microelectrode pushing device is to utilize motor 1 to be used as power, motor is the end that is contained in circular shell 18, there is symmetrical axial walls groove the housing both sides, the power transmission arm-tie 2 that slides along groove is housed on the wall groove, driving arm-tie by motor by the switching mechanism (not shown) slides, arm-tie drives the opening of two support arms (19,20,21,22) of a cover backup system again, armed lever 21 opens and is affixed on the borehole wall, opens at armed lever to drive the variation that hole diameter is measured in a potentiometer generation displacement in the process.The utility model is 18 li of circular shells between the center-pole 19 of an above-mentioned cover backup system and motor 1, be with slidably and between two round sliders (14,17) and the cylinder 8 of spacing; Plug 3 is housed between cylinder 8 and the motor; Sealed rubber ring 4 is housed between plug and cylinder; Cylinder 8 axially on have uniform 4 two footpath axial holes, motor side is inserted with potentiometer cylinder 6 and the piston guide rod that is connected with connecting rod for the particle size hole, piston 9 passes hole, thin footpath; Be with spring 7 on each potentiometer cylinder 6, one of spring is sat up straight on piston guide rod, and the other end is by cover [5 shutoff on the potentiometer cylinder, and ring flat-plate is screwed on cylinder 8 ends; Wherein cylinder 8 also is fixed on the housing with screw 24; Show by Fig. 2, two round sliders (14,17) housing located 18 has groove dress arm-tie 2 on axially, arm-tie and slide block (14, axial connection chute is arranged 17), pass the connection chute by arm-tie with screw 23 and be connected slide block (14,17) on, make slide block (14,17) slide with arm-tie and make between two slide blocks along chute apart from definite value, two slide blocks (14, the thick of uniform coaxial inner conductor arranged 17), thin 4 holes, it on the slide block 14 the particle size hole, insert two footpath bars 15 from the particle size hole, an end of bar 15 is a particle size, and the other end is thin footpath, between form the shaft shoulder, be with spring 16 on the bar of thin footpath, an end of spring is a slide block 17, and the other end is the shaft shoulder; 13,4 poles of hinged pole will be passed circular shell 18 on the particle size of bar 15, have corresponding axial groove on the housing; The pole end is hinged with as like the well logging of umbrella leg footpath armed lever 12, and armed lever one end is hinged on the housing 18, and housing 18 is passed with the cams transferring power that contacts with the end of piston 9 in this end of armed lever; Armed lever is affixed on the housing by gathering in the process of going into the well, and through driven by motor arm-tie 2 it is opened and makes the umbrella of 4 armed levers as opening.Two support arms in bottom (20,21,22) are slidingly connected by center-pole 19 and slide block 17.

Claims (1)

1, a kind of hole diameter microelectrode power pushing device that is used for open-hole measurement, it is in the end of circular shell (18) motor (1) to be housed, motor promotes by switching mechanism can be along the power transmission arm-tie (2) that slides on the groove of housing two side, drive the opening of two support arms (19,20,21,22) of a cover backup system, it is characterized in that:

(1), between the center-pole (19) of backup system and the motor (1) in housing (18) lining be with slidably and between two round sliders of spacing (14,17) and cylinder (8), plug (3) is housed between cylinder and the motor, glue ring (4) is housed between plug and cylinder;

(2), cylinder (8) axially on have uniform 4 two footpath axis holes, motor side is inserted with potentiometer cylinder (6) and the piston guide rod that is connected for the particle size hole, piston (9) passes hole, thin footpath; Be with spring (7) on each potentiometer cylinder (6), an end of spring is supported by piston guide rod, and the other end is by overlapping [(5) shutoff on the potentiometer cylinder, and ring flat-plate is screwed on cylinder (8) end;

(3), the round casing (18) located of two round sliders (14,17) has axial groove, arm-tie (2) is crossed groove with screw and is fixed slide block (14,17); Thick, thin 4 holes that uniform coaxial inner conductor is arranged on two slide blocks (14,17), slide block (14) is gone up and is gross porosity, insert two footpath bars (15) from gross porosity, on the particle size bar, be hinged with pole (13) the pole end that passes the circular shell axial groove and be hinged with as like the well logging of umbrella leg footpath armed lever (12) on the bar of thin footpath, being with spring (16) between two slide blocks, armed lever one end is hinged on the housing, and this end of each armed lever is with the terminal mutually transmission contact of cam with piston (9);

(4), two support arms (20,21,22) are slidingly connected by center-pole and slide block (17).

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