CN201857958U

CN201857958U - Six-arm borehole diameter logger

Info

Publication number: CN201857958U
Application number: CN201020278065XU
Authority: CN
Inventors: 李刚
Original assignee: XI'AN WELL-SUN ELECTRONIC INSTRUMENT Co Ltd
Current assignee: XI'AN WELL-SUN ELECTRONIC INSTRUMENT Co Ltd
Priority date: 2010-07-30
Filing date: 2010-07-30
Publication date: 2011-06-08
Anticipated expiration: 2020-07-30

Abstract

The utility model provides a six-arm borehole diameter logger, comprising an upper joint, an electronic instrument, a middle joint, a measuring arm shaft, an elastic sheet, a measuring arm and a lower joint. The measuring arm has six groups which are evenly disposed in the six grooves along the circumferential direction of the measuring arm shaft, and the root of the measuring arm is hinged to the two ends of an axial groove in a V shape. The elastic sheet is an arc spring piece which is disposed at the middle part of the axial groove on the measuring arm shaft with one end being fixed to the groove bottom of the measuring arm shaft and the other end being able to slide along the groove bottom. Holes at two ends of the measuring arm shaft are respectively provided with six groups of sensors evenly arranged along the radial direction, and 12 groups of sensors are fixed to two sensor fixing flanges. The roots of two ends of each measuring arm are both provided with a magnetizer which is relative to a sensor along the axial direction of the measuring arm shaft. The magnetizer can rotate with the measuring arm along a pin. The utility model is advantageous in that the situation in the mine shaft of the barefoot well can be measured from multiple angles and the measuring precision is high; with the arrangement of a free deflection guiding block and a telescopic measuring arm at the contacting part of the measuring arm and the borehole wall, the borehole diameter logger can be prevented from being stuck in the well.

Description

Six arm caliper logging tools

Technical field

The utility model relates to a kind of oil field open hole well device for subsurface measuring, particularly a kind of caliper logging tool of measuring the irregular form of open hole well well diameter.

Background technology

In the oil reservoir logging field, more and more important for the measurement of open hole well well diameter degree of irregularity, by measuring the degree of irregularity of drilling well hole diameter, the needed cement consumption parameter of the permanent position of sleeve pipe and cementing operation when selecting setting of casing; Also can be according to the irregular form of boring, the development degree in analysis and judgement subterranean strata crack and the direction in crack.But now to measure the Instrument measuring precision that the open hole well well diameter changes low in the oil field, can only measured X, the well diameter in two planes of Y, and can not cause measurement result and real well pore morphology deviation bigger from a plurality of angular measurement well diameter variations; Existing apparatus structure, its gage beam and borehole wall contact portion do not have guiding, and its gage beam can only endwisely slip along the centre axle, gage beam self length can't change, if run into borehole wall pit or during along borehole wall radial fissure, gage beam is stuck in pit or the crack easily, causes gage beam to endwisely slip along instrument again, so that instrument is met card, makes troubles to well logging.

Summary of the invention

The utility model has overcome the deficiency of existing instrument, and a kind of six arm caliper logging tools are provided, and can measure certainty of measurement height, and the chance card phenomenon after effectively avoiding instrument to go into the well from a plurality of angles to the situation in the open hole well pit shaft.

The technical solution of the utility model is: a kind of six arm caliper logging tools, comprise top connection, electronics, center tap, measurement arm axle, shell fragment, gage beam and lower contact, it is characterized in that gage beam is six groups altogether, be distributed in six grooves measuring the arm axle circumferencial direction, root is articulated on the gage beam axial notch two ends and struts by bearing pin and is the ∧ type; Shell fragment is an arcuate bombing leaf, is loaded on to measure axial notch middle part on the arm axle, and an end is fixed with at the bottom of the measurement arm axle groove, and the other end can slide along bottom land; In measuring hole, arm axle two ends six groups of radially uniform sensors are housed respectively, every group of sensor and two sensor mounting flanges are fixed, and sensor mounting flange and center tap are fixed, and another sensor mounting flange and lower contact are fixed; At each gage beam two ends root a magnetic conductor is housed all, and each magnetic conductor is axially relative along measuring arm axle with a sensor, this magnetic conductor can rotate along bearing pin with gage beam.

Every group of gage beam is by forming with straight pin axis two parts symmetrical, every part comprises spring, spring strut, guide cylinder, travelling arm and spacer pin, wherein two travelling arms are pegged graft mutually at its top-slitting place and guide pad are housed in its fluting and also use straight pin hinged, two spacer pins are loaded on the guide pad two ends and are connected with the two ends travelling arm, the spring strut top is placed in the travelling arm lower end, spring is contained in the spring strut and withstands on the travelling arm lower surface, and guide cylinder is loaded on the spring strut top and is placed in thin neck place, travelling arm lower end.

Every group of sensor is by a sensor outer housing, three cell windings that are enclosed within on three pin of one group of E sections core, sensor pressing plate and screw are formed, wherein E core is loaded in the sensor outer housing groove and fixes by screw and sensor pressing plate, and the tripod of E sections core is all parallel with the gage beam axis and in the gage beam axis hole.

The utility model has overcome the deficiency of existing instrument, can be from the variation of a plurality of angular measurement open hole well mineshaft diameters, thereby obtain cased well when carrying out cementing cement quantity and judge the development degree in subterranean strata crack and the direction in crack.The utility model sensor adopts the fine motion rotary angle transmitter, the certainty of measurement height, can react situation in the pit shaft more accurately, and and the chance card phenomenon of this caliper logging tool after gage beam and borehole wall contact portion have designed free deflection guide pad and scalable gage beam and effectively avoid instrument to go into the well.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model gage beam structural representation.

Fig. 3 is the syndeton schematic diagram of the utility model sensor and magnetic conductor.

Fig. 4 is the sensor construction schematic diagram.

The specific embodiment

As shown in Figure 1, the utility model mainly consists of: top connection 1, the electronics 2 that axially is connected with top connection, with the electronics 2 axial center taps 3 that are connected, the measurement arm axle 4 that axially is connected with center tap, be loaded on the shell fragment 5 of measuring axial notch middle part on the arm axle 4 and being fixed in bottom land, root be articulated in axial notch two ends on the gage beam 4 by bearing pin 11 and strut the gage beam 6 that is the ∧ type with measure the lower contacts 7 that arm axle 4 axially is connected.Wherein gage beam 6 and shell fragment 5 respectively are six groups, and gage beam 6 is distributed in the groove of measuring arm axle 4 circumferencial directions.

As shown in Figure 2, chief component of the present utility model is a gage beam 6, gage beam 6 is by forming with straight pin 17 axis two parts symmetrical, two travelling arms 15 are pegged graft mutually at its top-slitting place and guide pad 16 are housed in its fluting and also use straight pin 17 hinged, two spacer pins 18 are loaded on guide pad 16 two ends and are connected with two ends travelling arm 15, spring strut 13 tops are placed in travelling arm 15 lower ends, spring 12 is contained in the spring strut 13 and withstands on travelling arm 15 lower surfaces, and guide cylinder 14 is loaded on spring strut 13 tops and is placed in thin neck place, travelling arm 15 lower ends.

The operating principle of the utility model gage beam 6 is: when guide pad 16 contacts with the borehole wall gage beam 6 can along gage beam 6 roots with measure 11 rotations of arm axle 4 hinged place bearing pins, travelling arm 15 also can axially promote spring 12 stretching motions along spring strut 13, guide pad 16 can be along straight pin 17 swings under the effect of spacer pin 18, guide pad 16 play the guiding role in instrument well logging process, prevents instrument chance card; Six groups of gage beams 6 are accepted Tsang on measuring arm axle 4 in the axial notch, when gage beam 6 need strut, measure axial notch middle part on the arm axle 4 and be fixed in the shell fragment 5 of bottom land and give radial load and upspring by being positioned at, so just prevent that gage beam 6 two ends from forming the dead point and can't strut at straight pin 17 places, shell fragment 5 is an arcuate bombing leaf, fixes an end at the bottom of one end and measurement arm axle 4 grooves and can slide along bottom land.

As shown in Figure 3,12 groups of sensors 8 and two sensor mounting flanges 9 are radial uniform being fixed on the side end face along its center, and one of them sensor mounting flange 9 is fixing with center tap 3, and another sensor mounting flange 9 is fixing with lower contact 7.At every group of gage beam 6 two ends roots a magnetic conductor 10 is housed all, and each magnetic conductor 10 is axially relative along measuring arm axle 4 with a sensor 8, this magnetic conductor 10 can rotate along bearing pin 11 with gage beam 6.Gage beam 6 just can drive magnetic conductor 10 and rotates when instrument runs into the pit shaft internal diameter and changes, and sensor 8 produces signal because of magnetic conductor 10 rotates, and this signal is transferred to the variation that ground installation just can be discerned hole diameter after handling by electronics 2.

As shown in Figure 4, each sensor 8 comprises: 23, three of sensor outer housing is enclosed within the cell winding 20 on 21 3 pin of one group of E sections core, sensor pressing plate 19, screw 22.E core 21 is loaded in the sensor outer housing groove and by screw 22 and sensor pressing plate 19 and fixes.

DATA REASONING of the present utility model mainly is to realize by measuring 12 groups of (each six groups at two ends) sensors 8 that are equipped with in 4 liang of stomidiums of arm axle.

Claims

1. arm caliper logging tool, comprise top connection (1), electronics (2), center tap (3), measure arm axle (4), shell fragment (5), gage beam (6) and lower contact (7), it is characterized in that gage beam (6) is six groups altogether, be distributed in six grooves measuring arm axle (4) circumferencial direction, root is articulated in the last axial notch two ends of gage beam (4) and struts by bearing pin (11) and is the ∧ type; Described shell fragment (5) is an arcuate bombing leaf, is loaded on to measure upward axial notch middle part of arm axle (4), and an end is fixed with at the bottom of measurement arm axle (4) groove, and the other end can slide along bottom land; In measuring arm axle (4) two stomidiums, six groups of radially uniform sensors (8) are housed respectively, 12 groups of sensors (8) are fixing with two sensor mounting flanges (9), one of them sensor mounting flange (9) is fixing with center tap (3), and another sensor mounting flange (9) is fixing with lower contact (7); Root all is equipped with a magnetic conductor (10) at each gage beam (6) two ends, and each magnetic conductor (10) is axially relative along measuring arm axle (4) with a sensor (8), and this magnetic conductor (10) can rotate along bearing pin (11) with gage beam (6).

2. six arm caliper logging tools as claimed in claim 1, it is characterized in that every group of gage beam (6) is by forming with straight pin (17) axis two parts symmetrical, every part comprises spring (12), spring strut (13), guide cylinder (14), travelling arm (15) and spacer pin (18), wherein two travelling arms (15) are pegged graft mutually at its top-slitting place and guide pad (16) and hinged with straight pin (17) are housed in its fluting, two spacer pins (18) are loaded on guide pad (16) two ends and are connected with two ends travelling arm (15), spring strut (13) top is placed in travelling arm (15) lower end, spring (12) is contained in the spring strut (13) and withstands on travelling arm (15) lower surface, and guide cylinder (14) is loaded on spring strut (13) top and is placed in thin neck place, travelling arm (15) lower end.

3. six arm caliper logging tools as claimed in claim 1, it is characterized in that every group of sensor (8) is by a sensor outer housing (23), three cell windings (20) that are enclosed within on (21) three pin of one group of E sections core, sensor pressing plate (19) and screw (22) are formed, wherein E core (21) is loaded in the sensor outer housing groove and is fixing by screw (22) and sensor pressing plate (19), and the tripod of E sections core (21) is all parallel with measurement arm axle (4) axis and in measurement arm axle (4) hole.