CN208310759U

CN208310759U - Bidirectional electric eccentric

Info

Publication number: CN208310759U
Application number: CN201820878745.1U
Authority: CN
Inventors: 吴东
Original assignee: BEIJING GEO-VISTA TECHNOLOGY Ltd
Current assignee: BEIJING GEO-VISTA TECHNOLOGY Ltd
Priority date: 2018-06-07
Filing date: 2018-06-07
Publication date: 2019-01-01
Anticipated expiration: 2028-06-07

Abstract

The utility model relates to a kind of bidirectional electric eccentrics, mainly by circuit control unit, backup power detection unit, backup unit, bottom tuning unit composition.Circuit control unit is connected with backup arm, is opened and closed by motor control backup arm, and backup power detection unit is connected with backup arm, by displacement sensor backup pressure, controls the size of backup power.3.625 inches of instrument maximum gauge (92 millimeters), is used to help the instrument well logging that compensated neutron logging tool and litho-density tool etc. need eccentric tight contact well logging by 3.3 meters of length.The characteristics of instrument is survey and lower survey on instrument in the case where bias can be achieved.

Description

Bidirectional electric eccentric

Technical field

The utility model relates to a kind of bidirectional electric eccentrics, belong to oil exploration and development fields, are used to help in compensation Bias is can be achieved in the instrument well logging of the eccentric tight contact well logging of the needs such as sub- logging instrument and litho-density tool, the instrument In the case of, survey and lower survey on instrument.

Background technique

Existing eccentric, the following limitations exist: first, latch plate eccentric latch plate cannot be withdrawn, in wellbore Small or hole condition is difficult to by when bad and has the risk blocked.Second, common electric eccentric can only go up survey, cannot descend to survey. Third, common eccentric backup power is non-adjustable, the bad adaptability in different size of wellbore.

Summary of the invention

The purpose of this utility model is to provide a kind of bidirectional electric eccentrics (EDS-B), using latch plate backup arm knot Structure is opened and closed by motor control backup arm, adjusts backup power size, and is able to achieve survey and lower survey.Eccentric patch well can be reduced Risk of the wall logger in the bad well of hole condition when operation expands the applicable range of instrument.

The utility model uses following technical scheme: bidirectional electric eccentric is mainly by circuit control unit, backup power Detection unit, backup arm, bottom tuning unit composition, wherein circuit control unit is connected with backup arm, is pushed away by motor control Arm rest folding, backup power detection unit are connected with backup arm, by displacement sensor backup pressure, control the big of backup power It is small.

Backup arm is connected the design of additional latch plate using upper lower support arm, and latch plate is installed on the outside of support arm, outside instrument Backup slot is designed on shell, the thrust of the borehole wall can press down latch plate when surveying lower survey on instrument, shrink back backup arm in backup slot.

Direct current generator drives pull rod hinge that backup arm is pulled to realize folding by screw pair in circuit control unit.

Backup power detection unit uses displacement sensor, displacement sensor pull rod is connected on drive rod, real-time detection Backup pressure can carry out backup power control from surface readout pressure value.

Bottom tuning unit, tuning ring are connected by screw thread with lower contact, and tuning ring is adjusted by way of threading Position adjusts eccentric direction to adjust the direction of lower contact, the face that the instrument probe alignment connect under making needs to be close to.

The utility model has the advantages that:

1, receipts leg is opened using DC MOTOR CONTROL instrument, reduces instrument and meets card risk;

2, using displacement sensor, backup power control can be carried out by detecting backup pressure from surface readout real-time pressure value System;

3, two-way backup arm adds latch plate to design, and may be implemented to survey under survey.

Detailed description of the invention

The instrument system operation principle schematic diagram of Fig. 1 the utility model；

Fig. 2 circuit control unit apparatus structure figure；

Fig. 3 backup power detection unit apparatus structure figure；

Fig. 4 backup unit apparatus structure figure；

The bottom Fig. 5 tuning unit apparatus structure figure.

Specific embodiment

As shown in Figure 1, Figure 2, it is to pass through lead screw (25) and lead screw spiral shell by motor (12) that instrument shown in Fig. 3, Fig. 4 and Fig. 5, which is opened and receives leg, Female (30) drive drive rod (34) and interlocking lever (46) to do straight reciprocating motion, by hinge (47) drive backup arm (52) and (76) receipts leg is opened.

The pull rod of sensor (78) and drive rod (34) are fixed to one by link block (82) by the detection unit of backup power It rises.It is mobile that drive rod (34) are driven by motor (12), and drive the pull rod of sensor (78), and coupled arm fixed block (43) is fixed not It is dynamic, compressed spring (42) when drive rod (34) is mobile.Shift motion is limited by limit switch (31).When drive rod (34) is mobile, The decrement of spring (42) can change therewith, and backup power changes therewith.Pass through the variation monitoring backup of the pull rod of sensor (78) The variation of power.

To make instrument that upper survey and lower survey may be implemented, improved using upper and lower backup arm configuration and latch plate (85) The stress condition of backup arm, and protect backup arm.

The above is the preferred embodiment of the utility model and its technical principle used, for the technology of this field It is any to be based on technical solutions of the utility model base without departing substantially from the spirit and scope of the utility model for personnel Equivalent transformation, simple replacement on plinth etc. obviously change, and belong within scope of protection of the utility model.

Claims

1. a kind of bidirectional electric eccentric, it is characterised in that: mainly by circuit control unit, backup power detection unit, backup arm, Bottom tuning unit composition;

Wherein, circuit control unit is connected with backup arm, is opened and closed by motor control backup arm, backup power detection unit and backup Arm is connected, and by displacement sensor backup pressure, controls the size of backup power.

2. bidirectional electric eccentric according to claim 1, it is characterised in that: the backup arm uses upper lower support arm phase Even additional latch plate design, latch plate are installed on the outside of support arm, and backup slot is designed on tool housing, well when surveying lower survey on instrument The thrust of wall can press down latch plate, shrink back backup arm in backup slot.

3. bidirectional electric eccentric according to claim 1, it is characterised in that: direct current generator in the circuit control unit Drive pull rod hinge that backup arm is pulled to realize folding by screw pair.

4. bidirectional electric eccentric according to claim 1, it is characterised in that: the backup power detection unit is using displacement Displacement sensor pull rod is connected on drive rod by sensor, real-time detection backup pressure, can be with from surface readout pressure value Carry out the control of backup power.

5. bidirectional electric eccentric according to claim 1, it is characterised in that: the bottom tuning unit, tuning ring are logical It crosses screw thread to be connected with lower contact, the direction that the position adjustment lower contact of tuning ring is adjusted by way of threading is inclined to adjust Heart direction, the face that the instrument probe alignment connect under making needs to be close to.