CN211230433U - Shock absorber of logging instrument - Google Patents

Abstract

The utility model discloses a logging instrument bumper shock absorber belongs to the mechanical equipment field. The end of the shock absorption main shaft far away from the sliding piece is connected to a logging instrument, the logging instrument is placed in an oil well, when the situation that the deformation of a pipe column is collided or the sand outlet of the oil well is met, the sliding piece on the shock absorber of the logging instrument is impacted firstly, the sliding piece is impacted, the sliding piece can drive the connecting piece fixed with the sliding piece to move in the strip-shaped hole, the shock absorption main shaft moves in the sliding groove of the sliding piece, the impact cannot directly act on the logging instrument connected with the shock absorption main shaft, meanwhile, when the sliding piece moves together with the connecting piece, the elastic piece between the sliding piece and the shock absorption main shaft can be compressed, the elastic piece absorbs the impact and provides elastic force for avoiding the impact of the connecting piece and the strip-shaped hole, the shock absorption main shaft and the logging instrument connected with the shock absorption main shaft cannot be greatly impacted and vibrated.

Description

Shock absorber of logging instrument

Technical Field

The disclosure relates to the field of mechanical equipment, in particular to a shock absorber of a logging instrument.

Background

In the development process of an oil field, a logging instrument is often required to be placed in an oil well so as to know the stratum information of the oil well and the pipe column condition of the oil well, and then the next operation is carried out based on the logging result obtained by the logging instrument.

The oil well is in a relatively unstable state during the development process, and the deformation of an oil well pipe column or the sand production in the oil well can occur in the oil well. When the logging instrument is placed at the position where the pipe column deforms or sand is produced in the oil well, the logging instrument easily and directly collides the deformed position of the pipe column or the sand producing position of the oil well under the action of inertia, and the logging instrument is greatly impacted, so that the logging instrument can be damaged.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a shock absorber for a logging instrument, which can reduce the impact borne by the logging instrument when the logging instrument is impacted and reduce the possibility of damage to the logging instrument. The technical scheme is as follows:

the embodiment of the disclosure provides a shock absorber of a logging instrument, which comprises a shock absorption main shaft, a connecting piece, a sliding piece and an elastic piece,

it has the bar hole to open on the lateral wall of shock attenuation main shaft, the bar hole radially runs through the shock attenuation main shaft, the length direction in bar hole is parallel the axis of shock attenuation main shaft, it has the spout to open on the slider, the one end slidable ground of shock attenuation main shaft is inserted and is established in the spout, the slip direction of shock attenuation main shaft is parallel the axis of shock attenuation main shaft, the connecting piece is inserted and is established in the bar hole, the connecting piece with bar hole clearance fit, the connecting piece with slider fixed connection, the both ends of elastic component are connected respectively the shock attenuation main shaft with the slider, the flexible direction of elastic component is parallel the axis of shock attenuation main shaft.

Optionally, the sliding part is a sliding shaft, and an axis of the sliding part coincides with an axis of the shock absorption main shaft.

Optionally, the sliding groove is a cylindrical groove, an axis of the sliding groove coincides with an axis of the damping spindle, and the sliding groove is in clearance fit with the damping spindle.

Optionally, the sliding part is provided with an exhaust hole, and one end of the exhaust hole is communicated with the bottom of the sliding groove.

Optionally, the resilient member is in a compressed state.

Optionally, the elastic member is a spiral spring, two ends of the spiral spring respectively abut against the damping spindle and the sliding member, and the spiral spring is coaxially sleeved on the damping spindle.

Optionally, a positioning shoulder is disposed on the damping spindle, and one end of the spiral spring abuts against the positioning shoulder.

Optionally, a protrusion is disposed on an end surface of one end of the sliding member, which is far away from the damping spindle, and a projection area of the protrusion is smaller than a projection area of the sliding member on a plane where the end surface of the damping spindle is located.

Optionally, the shock absorber of the logging instrument further comprises a conical head, and a bottom surface of the conical head is connected with the protrusion.

Optionally, a coaxial weight-reduction annular groove is formed in the damping main shaft.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects: one end, far away from the sliding part, of the damping main shaft is connected to a logging instrument, the logging instrument is placed in an oil drainage well, if the end, far away from the sliding part, of the damping main shaft meets the deformation position of a pipe column or the sand production position of the oil well, the sliding part on a shock absorber of the logging instrument is impacted, the sliding part moves towards the damping main shaft, the damping main shaft moves in a sliding groove of the sliding part relative to the sliding part, the damping main shaft slides along the axial direction of the damping main shaft, and the damping. The connecting piece fixed with the slider also can produce the removal in the main epaxial bar hole of shock attenuation, connecting piece and bar hole clearance fit, the parallel shock attenuation main shaft's of length direction in bar hole axis, therefore the connecting piece can play the effect of direction to the slider, can produce the frictional force opposite with the impact force between connecting piece and the bar hole simultaneously, alleviates partial impact, reduces the impact and the vibrations that shock attenuation main shaft and logging instrument can receive. When the shock absorption main shaft and the sliding part are close to each other, the elastic part between the shock absorption main shaft and the sliding part can be compressed, the elastic part parallel to the axis of the shock absorption main shaft in the stretching direction can absorb the impact of the shock absorption main shaft in the axial direction, the shock absorption main shaft and the well logging instrument connected with the shock absorption main shaft can further reduce the impact and the shock, and the possibility that the well logging instrument is damaged due to the impact and the shock is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly introduced,

FIG. 1 is a schematic diagram of a shock absorber of a logging tool provided in an embodiment of the present disclosure;

FIG. 2 is a top view of a shock absorber of a logging instrument provided by embodiments of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a shock absorber of a logging tool provided in an embodiment of the present disclosure. Fig. 2 is a top view of a shock absorber of a logging tool provided in an embodiment of the present disclosure, and in conjunction with fig. 1 and 2, the shock absorber of the logging tool includes a shock-absorbing main shaft 1, a connecting member 2, a sliding member 3, and an elastic member 4.

Open on the lateral wall of shock attenuation main shaft 1 has bar hole 11, bar hole 11 radially runs through shock attenuation main shaft 1, the parallel axis of shock attenuation main shaft 1 of length direction A of bar hole 11, it has spout 31 to open on slider 3, the one end slidable of shock attenuation main shaft 1 is inserted and is established in spout 31, the parallel axis 1a of shock attenuation main shaft 1 of the slip direction of shock attenuation main shaft 1, connecting piece 2 is inserted and is established in bar hole 11, connecting piece 2 and 11 clearance fit in bar hole, connecting piece 2 and 3 fixed connection of slider, shock attenuation main shaft 1 and slider 3 are connected respectively to the both ends of elastic component 4, the parallel axis 1a of shock attenuation main shaft 1 of the flexible direction of elastic component 4.

One end, far away from the sliding part 3, of the damping main shaft 1 is connected to a logging instrument 10, the logging instrument 10 is placed in an oil drain well, if a deformation part of a pipe column or a sand outlet part of the oil well is met, the sliding part 3 on the damping device of the logging instrument is impacted, the sliding part 3 moves towards the damping main shaft 1, the damping main shaft 1 moves in a sliding groove 31 of the sliding part 3 relative to the sliding part 3, the damping main shaft 1 slides along the axial direction of the damping main shaft 1, and the damping main shaft 1 and the sliding part 3 are close to each other. Also can also produce the removal in the bar hole on shock attenuation main shaft 1 with 2 connecting pieces that slider 3 is fixed, connecting piece 2 and 11 clearance fit in bar hole, the parallel axis 1a of shock attenuation main shaft 1 of length direction A in bar hole 11, consequently connecting piece 2 can play the effect of direction to slider 3, can produce the frictional force opposite with the impact force between connecting piece 2 and the bar hole 11 simultaneously, alleviate some impact, reduce the impact and the vibrations that shock attenuation main shaft 1 and logging instrument 10 can receive. When the shock absorption main shaft 1 and the sliding part 3 are close to each other, the elastic part 4 between the shock absorption main shaft 1 and the sliding part 3 is compressed, the elastic part 4 parallel to the axis of the shock absorption main shaft 1 in the stretching direction can absorb the impact of the shock absorption main shaft 1 in the axial direction, the shock and the vibration of the shock absorption main shaft 1 and the logging instrument 10 connected with the shock absorption main shaft 1 are further reduced, and the possibility that the logging instrument 10 is damaged due to the shock and the vibration is reduced.

Referring to fig. 2, an intersection line of the strip-shaped hole 11 and the side wall of the damper spindle 1 is an intersection line 11a, and a longitudinal direction a of the strip-shaped hole 11 is a longitudinal direction of a geometric figure formed by the intersection line 11 a.

As shown in fig. 1, the end of the shock-absorbing spindle 1 away from the sliding member 3 may be provided with a threaded groove 12, and the threaded groove 12 is in threaded connection with a threaded protrusion 101 on the logging tool 10.

The adoption of the structure facilitates the connection of the damping main shaft 1 and the logging instrument 10.

In other embodiments provided by the present disclosure, the damping spindle 1 and the logging tool 10 may also be connected by using a connection plate and a bolt for fixing, which is not limited by the present disclosure.

As shown in fig. 1, a coaxial weight-reduction annular groove 13 may be formed in the damper spindle 1.

The weight reduction annular groove 13 is arranged, so that the shock absorption main shaft 1 can be conveniently disassembled and assembled, and the possibility that the shock absorption main shaft 1 is contacted with the side wall of an oil well is reduced.

Alternatively, the connecting member 2 may be a connecting pin.

The connecting piece 2 is a connecting pin, so that the matching between the connecting piece 2 and the strip-shaped hole 11 is easy to realize.

In other embodiments provided by the present disclosure, the connecting member 2 may also be a pin or screw structure, which is not limited by the present disclosure.

Referring to fig. 1 and 2, the slider 3 may be a sliding shaft, and an axis of the slider 3 coincides with an axis 1a of the damper spindle 1.

The sliding part 3 is arranged as a shaft, so that the sliding part 3 can move smoothly in an oil well, the axis of the sliding part 3 is coincided with the axis 1a of the damping main shaft 1, the gravity center of the shock absorber of the logging instrument can be close to the axis 1a of the damping main shaft 1, and the energy conservation that the logging instrument 10 shakes due to the unstable gravity center of the shock absorber of the logging instrument is reduced.

Illustratively, the sliding slot 31 may be a cylindrical slot, the axis of the sliding slot 31 coincides with the axis 1a of the shock absorbing main shaft 1, and the shock absorbing main shaft 1 and the sliding slot 31 are in clearance fit.

The sliding groove 31 is a cylindrical groove, the axis of the sliding groove 31 coincides with the axis 1a of the damping main shaft 1, and the damping main shaft 1 is in clearance fit with the sliding groove 31, the damping main shaft 1 can stably move along the axial direction of the damping main shaft 1 in the sliding groove 31, the damping main shaft 1 cannot generate large displacement in the radial direction of the damping main shaft 1, and vibration of the logging instrument 10 can be reduced. The clearance fit between the damping main shaft 1 and the sliding chute 31 can also ensure that the damping main shaft 1 smoothly moves in the sliding chute 31 and simultaneously exert certain friction force on the sliding chute 31 to offset part of impact force.

It should be noted that, in the axial direction of the damper spindle 1, the depth D of the chute 31 may be greater than the length L of the strip-shaped hole 11.

The depth D of the chute 31 is greater than the length L of the strip-shaped hole 11, so that the shock absorption main shaft 1 cannot collide with the bottom of the chute 31 when the connecting piece 2 moves in the strip-shaped hole 11.

As shown in fig. 1, the sliding member 3 may be provided with an air vent hole 32 on the premise that the sliding groove 31 is a cylindrical groove and the axis of the sliding groove 31 coincides with the axis 1a of the damper spindle 1, and one end of the air vent hole 32 communicates with the bottom of the sliding groove 31.

The exhaust hole 32 formed in the sliding part 3 and communicated with the sliding groove 31 enables air extruded in the sliding groove 31 to be exhausted from the exhaust hole 32 when the damping spindle 1 moves in the sliding groove 31, so that the movement of the damping spindle 1 cannot be influenced by air resistance, and the stable work of the shock absorber of the logging instrument is ensured.

Alternatively, the extending direction of the exhaust hole 32 may be perpendicular to the axial direction of the damper spindle 1.

This arrangement may reduce the effect of the vent holes on the strength of the tool shock absorber.

As shown in fig. 1, a weight-reducing annular groove 13 may also be provided on the slider 3 for ease of installation.

As shown in fig. 1, an end of the sliding member 3 away from the damper spindle 1 may be provided with a protrusion 33, and a projected area of the protrusion 33 on a plane of an end surface of the damper spindle 1 is smaller than a projected area of the sliding member 3.

The bulge 33 arranged at one end of the sliding part 3 far away from the damping spindle 1 directly contacts with a barrier in an oil well, and the projection area of the bulge 33 on the plane of the end face of the damping spindle 1 is smaller than that of the bulge 33 of the sliding part 3 on the plane of the end face of the damping spindle 1, so that the bulge 33 can bear impact in a concentrated manner, and the elastic part 4 can absorb the impact force conveniently.

In other embodiments provided by the present disclosure, the protrusion 33 and the sliding groove 31 may also be disposed in an irregular shape or a prism shape, which is not limited by the present disclosure.

The shock absorber of the logging instrument may further comprise a conical head 5, and the bottom surface of the conical head 5 is connected with the protrusion 33.

The arrangement of the conical head 5 can reduce the possibility that the shock absorber of the logging instrument is clamped in an oil well, and the shock absorber of the logging instrument is convenient to lift out of the oil well.

Alternatively, in the case where the slide groove 31 is a cylindrical groove and the slider 3 is a shaft, the projection 33 provided on the slider 3 may be provided in a cylindrical shape, and the axial direction of the projection 33 coincides with the axis of the slider 3.

Under the condition of the arrangement, most of the impact received by the protrusion 33 can be transmitted along the axial direction of the protrusion 33, at the moment, the damping main shaft 1 can stably move along the axial direction of the damping main shaft 1, the connecting piece 2 can stably move along the length direction A of the strip-shaped hole 11, the shock absorber of the logging instrument mainly transmits impact along the axial direction of the damping main shaft 1, the possibility of shaking of the shock absorber of the logging instrument is reduced, the possibility of shaking of the logging instrument 10 is reduced, and the possibility of damage is reduced.

On the premise that the protrusion 33 is cylindrical, a thread may be provided on the sidewall of the protrusion 33, and the protrusion 33 and the conical head 5 may be connected by the thread.

This arrangement facilitates the mounting and dismounting of the projection 33 to and from the cone head 5. Illustratively, the elastic member 4 may be in a compressed state.

When the elastic piece 4 is in a compressed state, the elastic piece 4 originally has certain elastic force on the damping spindle 1 and the sliding piece 3, when the sliding piece 3 is impacted, the elastic piece 4 can absorb the impact force, and meanwhile, the elastic force applied on the damping spindle 1 and the sliding piece 3 by the elastic piece 4 can simultaneously prevent the damping spindle 1 from sliding downwards and the sliding piece 3 from moving upwards, so that the displacement generated when the damping spindle 1 is impacted is reduced, and the use safety of the logging instrument 10 is improved.

Optionally, the elastic member 4 is a spiral spring, two ends of the spiral spring respectively abut against the damping spindle 1 and the sliding member 3, and the spiral spring is coaxially sleeved on the damping spindle 1.

The spiral spring can absorb more impact, and the structure is convenient to disassemble and assemble.

Optionally, the damper spindle 1 is provided with a positioning shoulder 14, and one end of the spiral spring abuts against the positioning shoulder 14. This structure can facilitate the installation of the elastic member 4.

The other end of the coil spring may abut against the end surface of the slider 3. The whole disassembly and assembly of the spiral spring are convenient.

In other embodiments provided by the present disclosure, the elastic member 4 may also use an annular elastic rubber or a spring installed at one side of the damper spindle 1 to achieve buffering between the damper spindle 1 and the slider 3, which is not limited by the present disclosure.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A shock absorber for a logging instrument is characterized by comprising a shock absorption main shaft (1), a connecting piece (2), a sliding piece (3) and an elastic piece (4),

a strip-shaped hole (11) is formed in the side wall of the damping main shaft (1), the strip-shaped hole (11) radially penetrates through the damping main shaft (1), the length direction (A) of the strip-shaped hole (11) is parallel to the axis (1a) of the damping main shaft (1), a sliding groove (31) is formed on the sliding part (3), one end of the damping main shaft (1) is inserted in the sliding groove (31) in a sliding way, the sliding direction of the damping main shaft (1) is parallel to the axis (1a) of the damping main shaft (1), the connecting pieces (2) are inserted in the strip-shaped holes (11), the connecting pieces (2) are in clearance fit with the strip-shaped holes (11), the connecting piece (2) is fixedly connected with the sliding piece (3), two ends of the elastic piece (4) are respectively connected with the damping main shaft (1) and the sliding piece (3), the stretching direction of the elastic piece (4) is parallel to the axis (1a) of the damping main shaft (1).

2. Logging instrument shock absorber according to claim 1, wherein the slide (3) is a sliding shaft, the axis of the slide (3) coinciding with the axis (1a) of the shock absorbing spindle (1).

3. A logging instrument shock absorber according to claim 2, wherein the slide groove (31) is a cylindrical groove, the axis of the slide groove (31) coincides with the axis (1a) of the shock absorbing spindle (1), the slide groove (31) being clearance fitted with the shock absorbing spindle (1).

4. A shock absorber according to claim 3, wherein the sliding member (3) is provided with a vent hole (32), and one end of the vent hole (32) is communicated with the bottom of the chute (31).

5. A logging instrument shock absorber according to any of claims 1-4, wherein the resilient member (4) is in compression.

6. A shock absorber according to any one of claims 1 to 4, wherein the elastic member (4) is a coil spring, both ends of the coil spring respectively abut against the shock absorbing main shaft (1) and the sliding member (3), and the coil spring is coaxially sleeved on the shock absorbing main shaft (1).

7. Logging instrument shock absorber according to claim 6, wherein the shock absorbing spindle (1) is provided with a positioning shoulder (14), one end of the helical spring abutting against the positioning shoulder (14).

8. A logging instrument shock absorber according to any of claims 1-4, wherein the end surface of the end of the sliding element (3) remote from the shock absorption spindle (1) is provided with a protrusion (33), and the projection area of the protrusion (33) on the plane of the end surface of the shock absorption spindle (1) is smaller than the projection area of the sliding element (3).

9. The logging instrument shock absorber according to claim 8, further comprising a conical head (5), wherein a bottom surface of the conical head (5) is connected with the protrusion (33).

10. A logging tool shock absorber according to any of claims 1-4, wherein the shock absorbing spindle (1) is provided with a coaxial weight-reducing annular groove (13).

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