CN210264667U - Guiding and damping device for open hole logging instrument - Google Patents

Abstract

The utility model relates to a guiding and damping device for an open hole logging instrument, which comprises an upper joint connected with the logging instrument, wherein a soft whip connecting device is suspended below the upper joint, and the lower end of the soft whip connecting device is connected with a soft whip assembly extending downwards; the soft whip assembly comprises a plurality of soft whip blocks which are sequentially hinged, one side of each soft whip block facing the well wall is a soft whip block arc surface, one side of each soft whip block facing the center of the well hole is a soft whip block plane, and the upper end of each soft whip block is provided with a soft whip block hinge joint extending upwards; the lower part of each soft whip block plane is respectively provided with an inwards concave soft whip block hinge socket, and the soft whip block hinge joint of the soft whip block positioned below is respectively hinged in the soft whip block hinge socket of the last soft whip block. The soft whip connecting device is provided with a damping spring assembly and a plane bearing slewing mechanism. The guiding and damping device for the open hole logging instrument can reliably protect the logging instrument and has the function of searching a well hole, so that the instrument can be smoothly put into the well.

Description

Guiding and damping device for open hole logging instrument

Technical Field

The utility model relates to a barefoot well is guide and damping device for logging instrument belongs to logging instrument appurtenance technical field in the pit, but the device wide application in highly deviated well, complicated well oil barefoot well logging construction operation.

Background

In the well logging construction process of an oil open hole well, the phenomenon that an instrument string meets a resistance at a step in the well is easy to occur, and the problem of the resistance is solved mainly by a method of guide weighting and lengthening at present. But the guide weighting is only suitable for the condition of simpler well condition, and the success rate of solving the problem of obstruction is lower. When facing a highly deviated well, a complex well and a plurality of steps in the well, the guidance capability and the guidance sensitivity are low, so that the guide instrument can not be used for searching the well hole, and the problem that the instrument string is blocked can not be solved.

In addition, when the instrument string is blocked in the well, a large impact force can be generated, and the instrument is easy to malfunction and even damaged. Not only increases the cost of maintaining or purchasing the instrument, but also needs to be strung down the well for many times under many conditions, prolongs the logging time, has low logging efficiency and causes unpredictable risks in the well.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a guide and damping device for open hole logging instrument, can protect the instrument reliably to have the function of looking for the well, make the instrument can descend the well smoothly.

In order to solve the technical problem, the utility model discloses a guiding and damping device for an open hole logging instrument, which comprises an upper joint connected with the logging instrument, wherein a soft whip connecting device is suspended below the upper joint, and the lower end of the soft whip connecting device is connected with a soft whip assembly extending downwards; the soft whip assembly comprises a plurality of soft whip blocks which are sequentially hinged, one side of each soft whip block, which faces a well wall, is a soft whip block arc surface, one side of each soft whip block, which faces the center of the well hole, is a soft whip block plane, and the upper end of each soft whip block is provided with a soft whip block hinge head which extends upwards; the lower part of each soft whip block plane is respectively provided with an inwards concave soft whip block hinge socket, and the soft whip block hinge joint of the soft whip block positioned below is respectively hinged in the soft whip block hinge socket of the last soft whip block.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the device is connected at the bottom of a logging instrument string, during logging, the arc surface of the soft whip block moves downwards towards the well wall, the hinge head of the soft whip block below is hinged in the hinge socket of the soft whip block above, so that the upper soft whip block and the lower soft whip block can rotate at a certain angle, and the soft whip blocks are sequentially hinged to enable the soft whip assembly to have larger bending performance. When the device meets a well wall step, the flexible whip assembly can bend in a direction away from the well wall, so that the purpose of avoiding the step and guiding the instrument string to search the well hole is achieved.

As the improvement of the utility model, two groups of soft whip block hinges and soft whip block hinge sockets are symmetrically arranged by taking the longitudinal axis of the soft whip block plane as a center, the round head of each soft whip block hinge is respectively provided with a soft whip block hinge pin hole, the axis of the soft whip block hinge pin hole is parallel to the width direction of the soft whip block plane, and a soft whip block hinge shaft is inserted into the soft whip block hinge pin hole; two be equipped with the articulated seat of soft whip piece of protrusion in soft whip piece plane between the articulated nest of soft whip piece, the width of the articulated seat of soft whip piece and the interval looks adaptation between two soft whip piece hinges, be equipped with the articulated seat pinhole of soft whip piece in the articulated seat of soft whip piece, the middle part of the articulated shaft of soft whip piece articulates respectively in the articulated seat pinhole of soft whip piece. The round head of the soft whip block hinge head protrudes out of the upper end of the soft whip block, and the cooperation of the round head of the soft whip block hinge head and the soft whip block hinge socket is favorable for the swinging of two sections of soft whip blocks; the soft whip block hinge seat of the previous section is clamped between the two soft whip block hinges of the next section, and the two soft whip block hinges through the soft whip block hinge shaft, so that the structure is very compact; the clearance between the upper soft whip block and the lower soft whip block provides conditions for the soft whip block to swing around the hinge shaft of the soft whip block on one hand, and limits the maximum swinging angle on the other hand.

As a further improvement of the utility model, the lower part of the soft whip block plane is provided with an inward-concave soft whip block hinge shaft avoiding groove, and the soft whip block hinge shaft avoiding groove is positioned outside one of the soft whip block hinge sockets and is coaxial with the pin hole of the soft whip block hinge seat; the soft whip block articulated shaft dodges the top in groove and is equipped with soft whip stationary blade recess, it is equipped with the soft whip stationary blade to inlay in the soft whip stationary blade recess, the lower extreme of soft whip stationary blade stretches into the soft whip block articulated shaft of its below and dodges in the groove and support and lean on the outer end at soft whip block articulated shaft. The soft whip block articulated shaft is inserted into the soft whip block articulated seat pin hole from one side of the soft whip block articulated shaft avoiding groove until the inner side end is abutted against the side wall of the soft whip block articulated socket, then the soft whip fixing piece is embedded into the soft whip fixing piece groove and fixed, and the outer side end of the soft whip block articulated shaft is blocked by the soft whip fixing piece to prevent the soft whip block articulated shaft from moving left and right; the upper and lower sections of soft whip blocks are reliably hinged and are convenient to disassemble and assemble.

As a further improvement of the utility model, the middle part of the soft whip block in the width direction of the plane is provided with a soft whip block fixing seat, the lower end of the soft whip block fixing seat covers the top of the soft whip block hinging seat, the upper end of the soft whip block fixing seat is flush with the upper end face of the soft whip block, the middle part of the soft whip block fixing seat in the height direction is provided with a soft whip spring support fixing groove extending along the transverse direction, the bottom of the soft whip spring support fixing groove is provided with a soft whip block fixing seat pin hole at a certain distance, and the axis of the soft whip block fixing seat pin hole is parallel to the axis of the soft whip spring support fixing; the soft whip spring support is embedded in the soft whip spring support fixing groove, the left side and the right side of the soft whip spring support extend towards the plane direction of the soft whip block and are clamped on the left side and the right side of the soft whip block fixing seat respectively, a soft whip spring support pin shaft is inserted into the bottom of the soft whip spring support, and the middle part of the soft whip spring support pin shaft is inserted into the soft whip block fixing seat pin hole; the soft whip spring support is characterized in that a soft whip spring fixing seat is embedded at the top of the soft whip spring support, a soft whip spring fixing shaft extending downwards is arranged at the lower end of the soft whip spring fixing seat, and a soft whip spring extending downwards is arranged on the soft whip spring fixing shaft; the upper end face of each soft whip spring fixing seat is provided with a soft whip spring fixing seat counter bore coaxial with the soft whip spring fixing shaft, a connecting shaft coaxial with the soft whip spring fixing shaft is inserted in each soft whip spring fixing seat counter bore, a connecting shaft convex ring is arranged in the middle of the connecting shaft, the lower end face of the connecting shaft convex ring abuts against the upper end of the soft whip spring fixing seat, and the lower end cap of the last soft whip spring is sleeved at the upper end of the connecting shaft and abuts against the corresponding connecting shaft convex ring. The soft whip block fixing seat is used for installing a soft whip spring positioned on the outer side of the plane of the soft whip block, the soft whip spring support is spanned on the soft whip block fixing seat and embedded in the soft whip spring support fixing groove, and the soft whip spring support pin shaft penetrates through a pin hole at the lower end of the soft whip spring support and a pin hole of the soft whip block fixing seat to fix the soft whip spring support on the soft whip block fixing seat. The soft whip spring support is provided with a semicircular top, a semicircular groove is formed in the middle of the semicircular top, the soft whip spring fixing seat is embedded in the semicircular groove of the soft whip spring support, the lower end of the connecting shaft is inserted into a counter bore of the soft whip spring fixing seat to achieve positioning, and the lower end face of the convex ring of the connecting shaft abuts against the soft whip spring fixing seat below to achieve axial positioning; the upper end of the soft whip spring is sleeved on a soft whip spring fixing shaft which extends downwards from the soft whip spring fixing seat; the lower end of the soft whip spring is sleeved on the connecting shaft. Through the insertion structure, the support at the two ends of the soft whip spring is very reliable and the installation is fast and convenient; on one hand, the soft whip spring provides buffer for bending of the soft whip assembly, reduces impact force and plays a role in protecting instruments; on the other hand, the tension of the soft whip spring enables the soft whip assembly to have a straightening trend, under the condition that the guide head is blocked, the soft whip overcomes the tension of the soft whip spring to bend, and after the soft whip crosses the step, the soft whip assembly returns to the straightening state, so that the soft whip assembly can be conveniently and rapidly put into a well.

As a further improvement of the utility model, the upper end of the top soft whip block is provided with a suspension connector, the upper part of the suspension connector is a complete suspension ring, a suspension semi-ring connected with the suspension ring into a whole is arranged below the suspension ring, and the suspension semi-ring is connected with a semi-ring gland surrounded by the suspension semi-ring; the suspension semi-ring is provided with a semi-annular groove, a rear semi-ring is embedded in the semi-annular groove, a semi-ring screw hole is formed in the circumference of the bottom wall of the semi-annular groove, a clamping ring set screw is screwed in the semi-ring screw hole, and the inner end of the clamping ring set screw is inserted into a rear semi-ring counter bore in the outer circumference of the rear semi-ring; the lower end of the soft whip connecting device is provided with a suspension shaft extending downwards, the lower end of the suspension shaft penetrates out of a central hole of the suspension connector downwards, a necking section is arranged at a distance from the lowest end of the suspension shaft, and the inner circumference of the rear half ring is clamped on the rear half circumference of the necking section of the suspension shaft; and a front half ring matched with the rear half ring is arranged on the end surface of the half ring gland facing the suspension half ring, and the inner circumference of the front half ring is clamped on the front half circumference of the neck section of the suspension shaft. The soft whip assembly is suspended below the suspension connector through the suspension shaft, the rear half ring is embedded in the semi-annular groove to obtain axial positioning, and the clamping ring tightens the screw to ensure that the rear half ring obtains radial positioning; after the semi-ring gland and the suspension semi-ring are encircled, the rear half circumference of the neck section of the suspension shaft is clamped by the rear semi-ring, the front side of the neck section is clamped by the front semi-ring, and the front semi-ring and the semi-ring gland are connected into a whole, so that the axial positioning of the suspension shaft and the soft whip assembly is realized, but the suspension shaft and the soft whip assembly can rotate, and the step of a well wall is avoided.

As a further improvement of the utility model, the upper end of the suspension shaft is connected to the center of the lower end of the suspension core cylinder, and the upper end of the suspension core cylinder is provided with an outward convex ring of the suspension core cylinder which is turned over outwards; the lower end of the upper joint is connected with a cylindrical sleeve through threads, the lower port of the cylindrical sleeve is provided with an inner convex ring of the cylindrical sleeve which protrudes inwards, and the lower step of the outer convex ring of the suspended core cylinder is pressed on the upper step of the inner convex ring of the cylindrical sleeve; and a suspension core cylinder counter bore is arranged in the center of the upper part of the suspension core cylinder, and a damping spring is arranged between the bottom wall of the suspension core cylinder counter bore and the lower end face of the upper joint. When the seeker is blocked by a larger amount, a larger impact force is generated, the soft whip assembly bends, and the suspension core cylinder compresses the damping spring upwards to lift the whole soft whip assembly upwards to absorb the impact energy, so that the impact force on the instrument string can be effectively relieved, the instrument is protected, and meanwhile, the buffering effect prevents the instrument from being blocked and static at a step, so that the instrument still has the kinetic energy of downward movement, and the instrument is favorable for finding a well hole. When the guide head passes over the step, the tension of the damping spring pushes the suspension core barrel to move downwards, so that the outer convex ring of the suspension core barrel is pressed on the inner convex ring of the cylindrical sleeve again to reset.

As a further improvement of the present invention, the upper end of the suspension shaft is connected to the center of the lower end of the suspension core cylinder, the upper end of the suspension core cylinder is provided with a suspension core cylinder internal thread, the suspension core cylinder internal thread is screwed to the periphery of the lower end of the connecting sleeve, the upper end circumference of the suspension core cylinder is screwed with an inner hexagon screw, and the inner end of the inner hexagon screw is screwed to the screw hole on the outer wall of the connecting sleeve; the outer periphery of the upper end of the connecting sleeve is screwed with a sealing cover, the transition joint penetrates through a central hole of the sealing cover, the sealing is realized by an O-shaped ring between the sealing cover and the sealing cover, the lower end of the transition joint extends downwards from the central hole of the connecting sleeve, the outer periphery of the lower end of the transition joint is provided with a transition joint thread, a bearing positioning ring is screwed on the transition joint thread, a lower plane bearing is arranged above the bearing positioning ring, and the top of the lower plane bearing is supported on an inner step of a lower port of the connecting sleeve; an upper plane bearing is mounted on an inner step of an upper port of the connecting sleeve, and the top of the upper plane bearing is supported below a shaft shoulder of the transition joint. The transition joint can be directly connected below the upper joint, and the sealing cover and the O-shaped ring thereof seal the space where the bearing is located, so that the good lubrication of the two plane bearings is ensured; because the soft whip block is asymmetric structure, under the effect of two plane bearings to and the effect of soft whip block self gravity, when transferring the instrument in the pit shaft, soft whip block circular arc face is transferred along the wall of a well, and two plane bearings can reduce the resistance when soft whip assembly is rotatory, make soft whip block can rotate more in a flexible way for transition joint.

As a further improvement of the utility model, the upper end of the transition joint is provided with a transition joint convex ring which is turned over outwards; the lower end of the upper joint is connected with a cylindrical sleeve through threads, the lower port of the cylindrical sleeve is provided with an inner convex ring of the cylindrical sleeve, and the lower step of the outer convex ring of the transition joint is pressed on the upper step of the inner convex ring of the cylindrical sleeve; and a transition joint counter bore is formed in the center of the upper part of the transition joint, and a damping spring is arranged between the bottom wall of the transition joint counter bore and the lower end face of the upper joint. The embodiment has the shock absorption function of the shock absorption spring, the flexible rotation function of the plane bearing and the function of automatically searching the borehole by the soft whip assembly, can effectively solve the problem that an instrument meets the step resistance during open hole well logging, can improve the logging timeliness, reduce the logging cost and simultaneously reduce the risk caused by multiple logging constructions; in addition, the shock absorption spring assembly effectively relieves the impact force on the instrument, can effectively reduce the damage rate of the instrument and reduce the cost for maintaining the instrument.

As a further improvement of the utility model, the center of the upper end of the soft whip fixing seat is provided with an inward-concave limiting press block long groove, the bottom wall of the limiting press block long groove is provided with a limiting press block long groove screw hole, a limiting block is fixed in the limiting press block long groove through a limiting block screw, and the inner end of the limiting block screw is screwed in the limiting press block long groove screw hole; the upper end of the limiting block is provided with an arc-shaped head, the center of the lower end of the soft whip block fixing seat is provided with a limiting arc-shaped groove, and the arc-shaped head at the upper end of the limiting block is embedded in the limiting arc-shaped groove of the last soft whip block. The circular arc head of stopper upper end and the cooperation of the spacing arc wall of last flexible whip piece form the effect similar to joint head and glenoid, make the swing of two sections flexible whip pieces about making on the one hand more stable, and on the other hand is spacing to the limit angle of swing again.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a front view of a first embodiment of the present invention.

Fig. 2 is a rear view of fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a cross-sectional view taken along a-a in fig. 1.

Fig. 5 is a perspective view of fig. 1.

Fig. 6 is an exploded view of fig. 5.

Fig. 7 is a perspective view of the whip block of fig. 1.

Fig. 8 is a front view of the whip block of fig. 1.

Fig. 9 is a left side view of fig. 8.

Fig. 10 is a bottom view of fig. 8.

Fig. 11 is a front view of a second embodiment of the present invention.

Fig. 12 is an enlarged view of the portion above the suspension shaft in fig. 11.

Fig. 13 is a front view of a third embodiment of the present invention.

In the figure: 1. an upper joint; 2. a cylindrical sleeve; 2a, a convex ring is arranged in the cylindrical sleeve; 3. a damping spring; 4. suspending the core barrel; 4a. a suspension shaft; 4a1. a necked section; 4b, suspending the outer convex ring of the core barrel; 4c, hanging the core cylinder counter bore; 5. a hanging connector; 5a, hanging a circular ring; 5b, hanging the semi-ring; 5b1. a semi-annular groove; 5b2. half-ring screw holes; 5c, a rear half ring; 5c1, forming a rear half ring counter bore; 5d, clamping ring set screws; 5e, semi-ring gland; 5e1. front half ring; 6. a soft whip block; 6a, a circular arc surface of the soft whip block; 6b, a soft whip block plane; 6c, a soft whip block hinge joint; 6c1. pin holes of the soft whip block hinge joint; 6d, hinging the soft whip block with the nest; 6e, hinging the soft whip block; 6f, a flexible whip block hinge seat; 6f1. pin hole of soft whip block hinge seat; 6g, hinging the soft whip block to avoid the groove; 6h, a groove of the soft whip fixing piece; 6j, a soft whip fixing piece; 6k, fixing a soft whip block; 6k1. soft whip spring support fixing groove; 6k2. soft whip block fixing seat pin hole; 6m1. limiting press block long groove; 6m2, limiting the arc-shaped groove; 6m3. limiting the screw hole of the long groove of the pressing block; 6n, a limiting block; 7. a soft whip spring support; 7a, a soft whip spring support pin shaft; 8. a soft whip spring fixing seat; 8a, fixing a shaft of the soft whip spring; 9. a connecting shaft; 9a, connecting shaft convex rings; 10. a soft whip spring; 11. a seeker; 11a, guiding a hinge joint; 11b, guiding a circular arc transition surface; a seeker spring seat; 11c1. a seeker spring insertion shaft; 12. connecting sleeves; 12a. socket head cap screw; 13. a sealing cover; 13a.O loops; 14. an upper flat bearing; 15. a lower plane bearing; 16. a bearing positioning ring; 17. a transition joint; transition joint outer convex ring.

Detailed Description

Fig. 1 to 10 show a first embodiment of the present invention, which is a guiding and damping device for an open hole logging instrument, and includes an upper joint 1 connected to a logging instrument, a soft whip connecting device suspended below the upper joint 1, a soft whip assembly extending downward and connected to a lower end of the soft whip connecting device, and a guiding head 11 connected to a lower end of the soft whip assembly; the soft whip assembly comprises a plurality of soft whip blocks 6 which are sequentially hinged, one side of each soft whip block 6, which faces the well wall, is a soft whip block arc surface 6a, one side of each soft whip block 6, which faces the center of the well hole, is a soft whip block plane 6b, and the upper end of each soft whip block 6 is provided with a soft whip block hinge joint 6c which extends upwards; the lower part of each soft whip block plane 6b is respectively provided with an inwards concave soft whip block hinge socket 6d, and the soft whip block hinge joint 6c of the soft whip block 6 positioned at the lower part is respectively hinged in the soft whip block hinge socket 6d of the last soft whip block 6.

The device is connected in the bottom of logging instrument cluster, and during the logging, soft whip piece arc surface 6a is down towards the wall of a well, and soft whip piece articulated joint 6c of below articulates in the articulated nest 6d of soft whip piece in the top, can take place the rotation of certain angle between two sections soft whip pieces 6 about making, and soft whip piece 6 of multisection is articulated in proper order and is made soft whip assembly have great bending property. When the device meets a well wall step, the flexible whip assembly can bend in a direction away from the well wall, so that the purpose of avoiding the step and guiding the instrument string to search the well hole is achieved.

Each soft whip block hinge 6c and the soft whip block hinge socket 6d are symmetrically provided with two groups by taking the longitudinal axis of the soft whip block plane 6b as a center, the round head of each soft whip block hinge 6c is provided with a soft whip block hinge pin hole 6c1 respectively, the axis of the soft whip block hinge pin hole 6c1 is parallel to the width direction of the soft whip block plane 6b, and a soft whip block hinge shaft 6e is inserted into the soft whip block hinge pin hole 6c 1; a soft whip block hinging seat 6f protruding out of the soft whip block plane 6b is arranged between the two soft whip block hinging sockets 6d, the width of the soft whip block hinging seat 6f is matched with the distance between the two soft whip block hinging heads 6c, a soft whip block hinging seat pin hole 6f1 is arranged in the soft whip block hinging seat 6f, and the middle parts of soft whip block hinging shafts 6e are respectively hinged in the soft whip block hinging seat pin holes 6f1.

The round head of the soft whip block hinge 6c protrudes out of the upper end of the soft whip block 6, and the round head of the soft whip block hinge 6c is matched with the soft whip block hinge socket 6d to facilitate the swing between the two sections of soft whip blocks 6; the soft whip block hinge seat 6f of the previous section is clamped between the two soft whip block hinge heads 6c of the next section, and the two soft whip block hinge heads are mutually hinged through the soft whip block hinge shafts 6e, so that the structure is very compact; the clearance between the upper and lower sections of the soft whip block 6 provides conditions for the soft whip block to swing around the soft whip block hinge shaft 6e on one hand, and limits the maximum swinging angle on the other hand.

The lower part of the soft whip block plane 6b is provided with an inward-sunken soft whip block hinge shaft avoiding groove 6g, and the soft whip block hinge shaft avoiding groove 6g is positioned at the outer side of one soft whip block hinge socket 6d and is coaxial with the soft whip block hinge seat pin hole 6f 1; the upper side of the soft whip block articulated shaft avoiding groove 6g is provided with a soft whip fixing piece groove 6h, the soft whip fixing piece groove 6h is embedded with a soft whip fixing piece 6j, and the lower end of the soft whip fixing piece 6j extends into the soft whip block articulated shaft avoiding groove 6g below the soft whip fixing piece and abuts against the outer end of the soft whip block articulated shaft 6e. The soft whip block articulated shaft 6e is inserted into the soft whip block articulated seat pin hole 6f1 from the side where the soft whip block articulated shaft avoiding groove 6g is located until the inner side end abuts against the side wall of the soft whip block articulated nest 6d, then the soft whip fixing piece 6j is embedded into the soft whip fixing piece groove 6h and fixed, and the outer side end of the soft whip block articulated shaft 6e is blocked by the soft whip fixing piece 6j to prevent the soft whip block articulated shaft from moving left and right; the upper and lower sections of soft whip blocks 6 are reliably hinged and are convenient to disassemble and assemble.

The middle part of soft whip piece plane 6b width direction is equipped with soft whip piece fixing base 6k, the lower extreme of soft whip piece fixing base 6k covers the top at the articulated seat 6f of soft whip piece, the upper end of soft whip piece fixing base 6k and the up end parallel and level of soft whip piece 6, the middle part of soft whip piece fixing base 6k direction of height is equipped with the fixed recess 6k1 of soft whip spring support along horizontal extension, one section distance in soft whip spring support fixed recess 6k 1's bottom interval is equipped with soft whip piece fixing base pinhole 6k2, the axis of soft whip piece fixing base pinhole 6k2 is on a parallel with the axis of soft whip spring support fixed recess 6k1.

The soft whip spring support 7 is embedded in the soft whip spring support fixing groove 6k1, the left side and the right side of the soft whip spring support 7 respectively extend towards the direction of the soft whip block plane 6b and are clamped on the left side and the right side of the soft whip block fixing seat 6k, the bottom of the soft whip spring support 7 is inserted with a soft whip spring support pin shaft 7a, and the middle of the soft whip spring support pin shaft 7a is inserted into the soft whip block fixing seat pin hole 6k2.

A soft whip spring fixing seat 8 is embedded at the top of the soft whip spring support 7, a soft whip spring fixing shaft 8a extending downwards is arranged at the lower end of the soft whip spring fixing seat 8, and a soft whip spring 10 extending downwards is arranged on the soft whip spring fixing shaft 8 a; the upper end face of each soft whip spring fixing seat 8 is provided with a soft whip spring fixing seat counter bore coaxial with the soft whip spring fixing shaft 8a respectively, a connecting shaft 9 coaxial with the soft whip spring fixing shaft 8a is inserted in each soft whip spring fixing seat counter bore, the middle part of the connecting shaft 9 is provided with a connecting shaft convex ring 9a, the lower end face of the connecting shaft convex ring 9a is abutted against the upper end of the soft whip spring fixing seat 8, and the lower end cap of the last soft whip spring 10 is sleeved at the upper end of the connecting shaft 9 and abutted against the corresponding connecting shaft convex ring 9a.

The soft whip block fixing seat 6k is used for installing a soft whip spring 10 located on the outer side of the soft whip block plane 6b, the soft whip spring support 7 straddles the soft whip block fixing seat 6k and is embedded in a soft whip spring support fixing groove 6k1, and a soft whip spring support pin shaft 7a penetrates through a pin hole in the lower end of the soft whip spring support 7 and a soft whip block fixing seat pin hole 6k2 to fix the soft whip spring support 7 on the soft whip block fixing seat 6k.

The soft whip spring support 7 is provided with a semicircular top, a semicircular groove is formed in the middle of the semicircular top, the soft whip spring fixing seat 8 is embedded in the semicircular groove of the soft whip spring support 7, the lower end of the connecting shaft 9 is inserted into a counter bore of the soft whip spring fixing seat to achieve positioning, and the lower end face of the connecting shaft convex ring 9a abuts against the soft whip spring fixing seat 8 below to achieve axial positioning; the upper end of the soft whip spring 10 is sleeved on a soft whip spring fixing shaft 8a extending downwards from the soft whip spring fixing seat 8; the lower end of the soft whip spring 10 is sleeved on the connecting shaft 9.

Through the insertion structure, the support at the two ends of the soft whip spring 10 is very reliable and the installation is fast and convenient; on one hand, the soft whip spring 10 provides buffer for bending of the soft whip assembly, reduces impact force and plays a role in protecting instruments; on the other hand, the tension of the soft whip spring 10 enables the soft whip assembly to have a straightening tendency, under the condition that the guide head 11 meets resistance, the soft whip overcomes the tension of the soft whip spring 10 to bend, and after the soft whip assembly passes over a step, the soft whip assembly returns to a straightening state, so that the soft whip assembly can be rapidly put into a well.

The upper end of the top soft whip block is provided with a suspension connector 5, the upper part of the suspension connector 5 is a complete suspension circular ring 5a, a suspension semi-ring 5b which is connected with the suspension circular ring 5a into a whole is arranged below the suspension circular ring 5a, and the suspension semi-ring 5b is connected with a semi-ring gland 5e which is surrounded with the suspension semi-ring 5 b; the suspension semi-ring 5b is provided with a semi-annular groove 5b1, a rear semi-ring 5c is embedded in the semi-annular groove 5b1, the circumference of the bottom wall of the semi-annular groove 5b1 is provided with a semi-ring screw hole 5b2, a clamping ring set screw 5d is screwed in the semi-ring screw hole 5b2, and the inner end of the clamping ring set screw 5d is inserted in a rear semi-ring counter bore 5c1 on the outer circumference of the rear semi-ring 5 c; the lower end of the soft whip connecting device is provided with a suspension shaft 4a extending downwards, the lower end of the suspension shaft 4a penetrates out of a central hole of the suspension connector 5 downwards, a necking section 4a1 is arranged at a distance from the lowest end of the suspension shaft 4a, and the inner circumference of the rear half ring 5c is clamped on the rear half circumference of the necking section 4a1 of the suspension shaft; the end surface of the half ring gland 5e facing the suspension half ring 5b is provided with a front half ring 5e1 matched with the rear half ring 5c, and the inner circumference of the front half ring 5e1 is clamped on the front half circumference of the suspension shaft necking section 4a1.

The soft whip assembly is suspended below the suspension connector 5 through the suspension shaft 4a, the rear half ring 5c is embedded in the semi-annular groove 5b1 to obtain axial positioning, and the clamping ring set screw 5d enables the rear half ring 5c to obtain radial positioning; after the semi-ring gland 5e and the suspension semi-ring 5b are encircled, the rear half circumference of the suspension shaft necking section 4a1 is clamped by the rear semi-ring 5c, the front side of the necking section 4a1 is clamped by the front semi-ring 5e1, and the front semi-ring 5e1 and the semi-ring gland 5e are connected into a whole, so that the axial positioning of the suspension shaft 4a and the soft whip assembly is realized, but the rotation is facilitated, and the step of the well wall is avoided.

The upper end of the suspension shaft 4a is connected with the center of the lower end of the suspension core barrel 4, and the upper end of the suspension core barrel 4 is provided with a suspension core barrel outer convex ring 4b which is turned outwards; the lower end of the upper joint 1 is connected with a cylindrical sleeve 2 through threads, the lower port of the cylindrical sleeve 2 is provided with an inner convex ring 2a of the cylindrical sleeve which protrudes inwards, and the lower step of the outer convex ring 4b of the suspended core cylinder is pressed on the upper step of the inner convex ring 2a of the cylindrical sleeve; the center of the upper part of the suspension core cylinder 4 is provided with a suspension core cylinder counter bore 4c, and a damping spring 3 is arranged between the bottom wall of the suspension core cylinder counter bore 4c and the lower end surface of the upper joint 1.

When the seeker 11 encounters a larger obstruction, a larger impact force is generated, the suspension core cylinder 4 compresses the damping spring 3 upwards while the soft whip assembly is bent, so that the whole soft whip assembly is lifted upwards, the impact energy is absorbed, the impact force on an instrument string can be effectively relieved, the instrument is protected, and meanwhile, the buffering effect prevents the instrument from being stopped at a step, so that the instrument still has kinetic energy of downward movement, and the instrument is favorable for finding a well hole. When the guide head 11 passes over the step, the tension of the damping spring 3 pushes the suspension core barrel 4 to descend, so that the outer convex ring 4b of the suspension core barrel presses the inner convex ring 2a of the cylindrical sleeve again to reset.

The center of the upper end of the soft whip fixing seat 6k is provided with an inward-sunken limiting press block long groove 6m1, the bottom wall of the limiting press block long groove 6m1 is provided with a limiting press block long groove screw hole 6m3, a limiting block 6n is fixed in the limiting press block long groove 6m1 through a limiting block screw, and the inner end of the limiting block screw is screwed in the limiting press block long groove screw hole 6m 3; the upper end of the limiting block 6n is provided with a circular arc-shaped head, the center of the lower end of the soft whip block fixing seat 6k is provided with a limiting arc-shaped groove 6m2, and the circular arc-shaped head at the upper end of the limiting block 6n is embedded in the limiting arc-shaped groove 6m2 of the last soft whip block 6. The circular arc head of the upper end of the limiting block 6n is matched with the limiting arc groove 6m2 of the last soft whip block 6 to form the effect similar to a joint head and a joint socket, so that the swinging of the upper soft whip block 6 and the lower soft whip block 6 is more stable on one hand, and the swinging limit angle is limited on the other hand.

The guide head 11 is L-shaped in section, the upper end of the guide head 11 is provided with a guide hinge joint 11a extending upwards, and the guide hinge joint 11a is hinged in a soft whip block hinge socket 6d of the bottom soft whip block; a guide head spring seat 11c is installed at the lower end of the guide head 11, the lower end of the guide head spring seat 11c is inserted into a counter bore at the lower end of the guide head 11, a guide head spring insertion shaft 11c1 which extends upwards is arranged at the upper end of the guide head spring seat 11c, and the lower end of the soft whip spring 10 at the lowest end is sleeved on the guide head spring insertion shaft 11c 1; the outer periphery and the bottom of the guide head 11 are provided with guide arc transition surfaces 11b which are contracted towards the center downwards. The guiding arc of the guiding head 11 is beneficial to finding a well hole and crossing a step of a well wall, the guiding head spring seat 11c provides positioning for the soft whip spring 10 at the lowest end, and the guiding head 11 and the soft whip block 6 at the lowest part can swing at a certain angle, so that guiding is smoother.

The soft whip block planes 6b of the soft whip blocks 6 are positioned in the same vertical plane, the soft whip block arc surfaces 6a of at least four sections of soft whip blocks 6 at the lower part are in a conical shape with a larger upper part and a smaller lower part, and the sizes of the soft whip blocks 6 are smaller downwards. The soft whip assembly is of a structure with a large upper part and a small lower part, has elasticity and is favorable for moving downwards in a well hole and crossing over a well wall step.

Fig. 11 and 12 show a second embodiment of the present invention, and the structure of the flexible whip assembly is the same as that of the first embodiment. The upper end of a suspension shaft 4a is connected to the center of the lower end of a suspension core barrel 4, the upper end of the suspension core barrel 4 is provided with suspension core barrel internal threads, the suspension core barrel internal threads are screwed on the periphery of the lower end of a connecting sleeve 12, the upper end circumference of the suspension core barrel 4 is screwed with an inner hexagon screw 12a, and the inner end head of the inner hexagon screw 12a is screwed in a screw hole in the outer wall of the connecting sleeve 12; the periphery of the upper end of the connecting sleeve 12 is screwed with a sealing cover 13, a transition joint 17 penetrates through a central hole of the sealing cover 13, the sealing between the sealing cover and the sealing cover is realized through an O-shaped ring 13a, the lower end of the transition joint 17 extends downwards from the central hole of the connecting sleeve 12, the periphery of the lower end of the transition joint 17 is provided with a transition joint thread, a bearing positioning ring 16 is screwed on the transition joint thread, a lower plane bearing 15 is arranged above the bearing positioning ring 16, and the top of the lower plane bearing 15 is supported on an inner step of a lower port of the connecting; an upper plane bearing 14 is arranged on an inner step of the upper port of the connecting sleeve 12, and the top of the upper plane bearing 14 is supported below a shaft shoulder of the transition joint 17.

The transition joint 17 can be directly connected below the upper joint 1, and the sealing cover 13 and the O-shaped ring 13a thereof seal the space where the bearing is positioned, so that the good lubrication of the two plane bearings is ensured; because the soft whip block 6 is asymmetric structure, under the effect of two plane bearings to and the effect of soft whip block 6 self gravity, when transferring the instrument in the pit shaft, soft whip block arc surface 6a transfers against the wall of a well, and two plane bearings can reduce the resistance when soft whip assembly is rotatory, make soft whip block 6 can rotate more in a flexible way for transition joint 17.

Fig. 13 shows a third embodiment of the present invention, in which a damping spring 3 assembly is added to the second embodiment. The upper end of the transition joint 17 is provided with a transition joint convex ring 17a which is turned over outwards; the lower end of the upper joint 1 is connected with a cylindrical sleeve 2 through threads, the lower port of the cylindrical sleeve 2 is provided with an inner convex ring 2a of the cylindrical sleeve which protrudes inwards, and the lower step of the outer convex ring 17a of the transition joint is pressed on the upper step of the inner convex ring 2a of the cylindrical sleeve; the center of the upper part of the transition joint 17 is provided with a transition joint counter bore, and a damping spring 3 is arranged between the bottom wall of the transition joint counter bore and the lower end face of the upper joint 1.

The embodiment has the shock absorption function of the shock absorption spring 3, the flexible rotation function of the plane bearing and the function of automatically searching the borehole by the soft whip assembly, can effectively solve the problem that an instrument meets the step resistance during open hole well logging, can improve the logging time efficiency, reduce the logging cost and simultaneously reduce the risk caused by multiple logging constructions; in addition, the shock absorption spring assembly effectively relieves the impact force on the instrument, can effectively reduce the damage rate of the instrument and reduce the cost for maintaining the instrument.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims (9)

1. The utility model provides a guide and damping device for open hole logging instrument, includes the top connection of being connected with logging instrument, its characterized in that: a soft whip connecting device is suspended below the upper connector, and the lower end of the soft whip connecting device is connected with a soft whip assembly extending downwards; the soft whip assembly comprises a plurality of soft whip blocks which are sequentially hinged, one side of each soft whip block, which faces a well wall, is a soft whip block arc surface, one side of each soft whip block, which faces the center of the well hole, is a soft whip block plane, and the upper end of each soft whip block is provided with a soft whip block hinge head which extends upwards; the lower part of each soft whip block plane is respectively provided with an inwards concave soft whip block hinge socket, and the soft whip block hinge joint of the soft whip block positioned below is respectively hinged in the soft whip block hinge socket of the last soft whip block.

2. The apparatus of claim 1, wherein the apparatus further comprises: two groups of soft whip block hinges and soft whip block hinge sockets are symmetrically arranged by taking the longitudinal axis of the plane of the soft whip block as a center, the round head of each soft whip block hinge is respectively provided with a soft whip block hinge pin hole, the axis of each soft whip block hinge pin hole is parallel to the width direction of the plane of the soft whip block, and a soft whip block hinge shaft is inserted in each soft whip block hinge pin hole; two be equipped with the articulated seat of soft whip piece of protrusion in soft whip piece plane between the articulated nest of soft whip piece, the width of the articulated seat of soft whip piece and the interval looks adaptation between two soft whip piece hinges, be equipped with the articulated seat pinhole of soft whip piece in the articulated seat of soft whip piece, the middle part of the articulated shaft of soft whip piece articulates respectively in the articulated seat pinhole of soft whip piece.

3. The guidance and damping device for an open hole logging instrument of claim 2, wherein: the lower part of the soft whip block plane is provided with an inward-sunken soft whip block hinge shaft avoiding groove, and the soft whip block hinge shaft avoiding groove is positioned at the outer side of one soft whip block hinge socket and is coaxial with the pin hole of the soft whip block hinge seat; the soft whip block articulated shaft dodges the top in groove and is equipped with soft whip stationary blade recess, it is equipped with the soft whip stationary blade to inlay in the soft whip stationary blade recess, the lower extreme of soft whip stationary blade stretches into the soft whip block articulated shaft of its below and dodges in the groove and support and lean on the outer end at soft whip block articulated shaft.

4. The guidance and damping device for an open hole logging instrument of claim 2, wherein: the middle part of the plane width direction of the soft whip block is provided with a soft whip block fixing seat, the lower end of the soft whip block fixing seat covers the top of the soft whip block hinge seat, the upper end of the soft whip block fixing seat is flush with the upper end face of the soft whip block, the middle part of the height direction of the soft whip block fixing seat is provided with a soft whip spring support fixing groove extending along the transverse direction, the bottom of the soft whip spring support fixing groove is provided with a soft whip block fixing seat pin hole at a certain distance, and the axis of the soft whip block fixing seat pin hole is parallel to the axis of the soft whip spring support fixing groove; the soft whip spring support is embedded in the soft whip spring support fixing groove, the left side and the right side of the soft whip spring support extend towards the plane direction of the soft whip block and are clamped on the left side and the right side of the soft whip block fixing seat respectively, a soft whip spring support pin shaft is inserted into the bottom of the soft whip spring support, and the middle part of the soft whip spring support pin shaft is inserted into the soft whip block fixing seat pin hole; the soft whip spring support is characterized in that a soft whip spring fixing seat is embedded at the top of the soft whip spring support, a soft whip spring fixing shaft extending downwards is arranged at the lower end of the soft whip spring fixing seat, and a soft whip spring extending downwards is arranged on the soft whip spring fixing shaft; the upper end face of each soft whip spring fixing seat is provided with a soft whip spring fixing seat counter bore coaxial with the soft whip spring fixing shaft, a connecting shaft coaxial with the soft whip spring fixing shaft is inserted in each soft whip spring fixing seat counter bore, a connecting shaft convex ring is arranged in the middle of the connecting shaft, the lower end face of the connecting shaft convex ring abuts against the upper end of the soft whip spring fixing seat, and the lower end cap of the last soft whip spring is sleeved at the upper end of the connecting shaft and abuts against the corresponding connecting shaft convex ring.

5. The apparatus of claim 4, wherein the apparatus further comprises: the upper end of the top soft whip block is provided with a suspension connector, the upper part of the suspension connector is a complete suspension ring, a suspension semi-ring connected with the suspension ring into a whole is arranged below the suspension ring, and the suspension semi-ring is connected with a semi-ring gland surrounding the suspension semi-ring; the suspension semi-ring is provided with a semi-annular groove, a rear semi-ring is embedded in the semi-annular groove, a semi-ring screw hole is formed in the circumference of the bottom wall of the semi-annular groove, a clamping ring set screw is screwed in the semi-ring screw hole, and the inner end of the clamping ring set screw is inserted into a rear semi-ring counter bore in the outer circumference of the rear semi-ring; the lower end of the soft whip connecting device is provided with a suspension shaft extending downwards, the lower end of the suspension shaft penetrates out of a central hole of the suspension connector downwards, a necking section is arranged at a distance from the lowest end of the suspension shaft, and the inner circumference of the rear half ring is clamped on the rear half circumference of the necking section of the suspension shaft; and a front half ring matched with the rear half ring is arranged on the end surface of the half ring gland facing the suspension half ring, and the inner circumference of the front half ring is clamped on the front half circumference of the neck section of the suspension shaft.

6. The guidance and damping device for an open hole logging instrument of claim 5, wherein: the upper end of the suspension shaft is connected to the center of the lower end of the suspension core barrel, and the upper end of the suspension core barrel is provided with an outward convex ring of the suspension core barrel which is turned over outwards; the lower end of the upper joint is connected with a cylindrical sleeve through threads, the lower port of the cylindrical sleeve is provided with an inner convex ring of the cylindrical sleeve which protrudes inwards, and the lower step of the outer convex ring of the suspended core cylinder is pressed on the upper step of the inner convex ring of the cylindrical sleeve; and a suspension core cylinder counter bore is arranged in the center of the upper part of the suspension core cylinder, and a damping spring is arranged between the bottom wall of the suspension core cylinder counter bore and the lower end face of the upper joint.

7. The guidance and damping device for an open hole logging instrument of claim 5, wherein: the upper end of the suspension shaft is connected to the center of the lower end of the suspension core cylinder, the upper end of the suspension core cylinder is provided with suspension core cylinder internal threads, the suspension core cylinder internal threads are screwed on the periphery of the lower end of the connecting sleeve, the upper end circumference of the suspension core cylinder is screwed with inner hexagon screws, and the inner end heads of the inner hexagon screws are screwed in screw holes in the outer wall of the connecting sleeve; the outer periphery of the upper end of the connecting sleeve is screwed with a sealing cover, the transition joint penetrates through a central hole of the sealing cover, the sealing is realized by an O-shaped ring between the sealing cover and the sealing cover, the lower end of the transition joint extends downwards from the central hole of the connecting sleeve, the outer periphery of the lower end of the transition joint is provided with a transition joint thread, a bearing positioning ring is screwed on the transition joint thread, a lower plane bearing is arranged above the bearing positioning ring, and the top of the lower plane bearing is supported on an inner step of a lower port of the connecting sleeve; an upper plane bearing is mounted on an inner step of an upper port of the connecting sleeve, and the top of the upper plane bearing is supported below a shaft shoulder of the transition joint.

8. The guidance and damping device for an open hole logging instrument of claim 7, wherein: the upper end of the transition joint is provided with a transition joint convex ring which is turned over outwards; the lower end of the upper joint is connected with a cylindrical sleeve through threads, the lower port of the cylindrical sleeve is provided with an inner convex ring of the cylindrical sleeve, and the lower step of the outer convex ring of the transition joint is pressed on the upper step of the inner convex ring of the cylindrical sleeve; and a transition joint counter bore is formed in the center of the upper part of the transition joint, and a damping spring is arranged between the bottom wall of the transition joint counter bore and the lower end face of the upper joint.

9. The apparatus of claim 4, wherein the apparatus further comprises: the upper end center of the soft whip block fixing seat is provided with an inward-sunken limiting pressing block long groove, the bottom wall of the limiting pressing block long groove is provided with a limiting pressing block long groove screw hole, a limiting block is fixed in the limiting pressing block long groove through a limiting block screw, and the inner end of the limiting block screw is screwed in the limiting pressing block long groove screw hole; the upper end of the limiting block is provided with an arc-shaped head, the center of the lower end of the soft whip block fixing seat is provided with a limiting arc-shaped groove, and the arc-shaped head at the upper end of the limiting block is embedded in the limiting arc-shaped groove of the last soft whip block.

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