CN212867471U - Lifting tool - Google Patents

Abstract

The application discloses carry instrument includes: the lower end of the mandrel is sequentially provided with a gradually reducing section and a gradually expanding section along the axial direction, the diameter of the large-diameter end of the gradually expanding section is larger than the diameter of the rest shaft sections of the mandrel, and the mandrel is radially provided with a limit pin; the mandrel is movably sleeved in the sleeve, a guide hole is formed in the cylinder wall of the sleeve, the guide hole can guide the limiting pin to move up and down and move circumferentially, a downward moving limiting table is arranged on the outer wall of the sleeve, a plurality of axial open grooves are formed in the lower cylinder wall of the sleeve, a lifting boss is arranged on the outer wall of the lower end of the sleeve, the diameter of the large-diameter end of the gradually expanding section is larger than the inner diameter of the sleeve and smaller than the outer diameter of the lifting boss, and the gradually expanding section can enter the lower end of the sleeve and radially and outwardly expand the lower cylinder; the lifting ring is fixed at the upper end of the mandrel. This carry instrument makes the gradual-expanding section pull the boss with telescopic carrying to strut or contract and resume to original diameter through the cooperation of the spacer pin of dabber and the different positions of telescopic guiding hole, when having satisfied the suspension force, conveniently dismantles and takes out.

Description

Lifting tool

Technical Field

The utility model relates to a drilling engineering technical field, in particular to lifting tool.

Background

With the increase of directional wells and horizontal wells, the application of measurement instruments while drilling is more and more popular. The measurement-while-drilling instruments are all placed in the non-magnetic drill collar and used for measuring data such as azimuth, well deviation and the like, so that technicians can refer to the data and make measures. The measurement while drilling instrument is suspended and pulled through the pulling tool, and particularly, a shoulder surface is arranged in a water hole at the top of the measurement while drilling instrument and used for being matched and suspended with the lower end of the pulling tool, and the shoulder surface is designed to be conical in order to reduce the eddy effect. For this purpose, the lower end of most pulling tools is also designed with a correspondingly tapered conical design.

The lower end of the pulling tool is provided with a conical structure, so that the lower end of the pulling tool is provided with a conical structure, the lower part of the pulling tool is easy to cause slippage of a measurement-while-drilling instrument hung on the lower part, and the instrument is easy to slip, and the instrument enters a well, therefore, most of the pulling tools of the measurement-while-drilling instruments are designed to be complex for ensuring the pulling force, although the instruments are firmly hung in the using process, the pulling tools are difficult to take out of the measurement-while-drilling instrument after the.

Therefore, how to solve the problems of insufficient hanging force and inconvenient disassembly of the lifting tool becomes a problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a lifting tool to satisfy the suspension force and facilitate the detachment.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a pulling tool, comprising:

the lower end of the mandrel is sequentially provided with a gradually-reducing section and a gradually-expanding section along the axial direction, the diameter of the large-diameter end of the gradually-expanding section is larger than the diameters of the rest shaft sections of the mandrel, and the mandrel is radially provided with a limiting pin;

the mandrel is movably sleeved in the sleeve, a guide hole which is in guide limit fit with the limit pin is formed in the wall of the sleeve, the upper part of the guide hole can guide the limit pin to move up and down, the lower part of the guide hole can guide the limit pin to move circumferentially, a downward movement limit table used for limiting the downward movement of the sleeve is arranged on the outer wall of the sleeve, a plurality of axial open slots which are distributed in the circumferential direction are formed in the wall of the lower part of the sleeve, a lifting boss is arranged on the outer wall of the lower end of the sleeve, the diameter of the large-diameter end of the gradually-expanding section of the mandrel is larger than the inner diameter of the sleeve and smaller than the outer diameter of the lifting boss, and the gradually-expanding section can enter the lower end of the sleeve and radially outwardly expand the wall of the;

and the lifting ring is fixed at the upper end of the mandrel.

Preferably, in the above lifting tool, the guide hole, the downward movement limiting table, the axial opening groove, and the lifting boss are sequentially arranged from top to bottom along the axial direction of the sleeve.

Preferably, in foretell pulling tool, still include the block, the block is provided with axial through-hole, the upper end of dabber passes axial through-hole, the fixed cover of block is located telescopic upper portion outer wall, the block covers the guiding hole, the spacer pin radially alternates and sets up in the round pin shaft hole on dabber upper portion.

Preferably, in the above pulling tool, the guide hole is an L-shaped guide hole or a T-shaped guide hole.

Preferably, in the above pulling tool, the lower inner cylindrical wall of the sleeve is an outwardly expanding conical surface.

Preferably, in the above-described pulling tool, the pulling boss is a pulling frustum, and an upper end surface of the pulling frustum is a tapered surface.

Preferably, in the above pulling tool, the cap is screwed to an upper end outer wall of the sleeve.

Preferably, in the above pulling tool, the bail is screwed to the upper end of the mandrel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a lifting tool, which comprises a mandrel, a sleeve and a lifting ring; the lower end of the mandrel is sequentially provided with a gradually reducing section and a gradually expanding section along the axial direction, the diameter of the large-diameter end of the gradually expanding section is larger than the diameter of the rest shaft sections of the mandrel, and the mandrel is radially provided with a limit pin; the mandrel is movably sleeved in the sleeve, a guide hole which is in guide limit fit with the limit pin is formed in the wall of the sleeve, the upper part of the guide hole can guide the limit pin to move up and down, the lower part of the guide hole can guide the limit pin to move circumferentially, a downward movement limit table used for limiting the downward movement of the sleeve is arranged on the outer wall of the sleeve, a plurality of axial open slots which are distributed in the circumferential direction are formed in the wall of the lower part of the sleeve, a lifting boss is arranged on the outer wall of the lower end of the sleeve, the diameter of the large-diameter end of the gradually-expanded section of the mandrel is larger than the inner diameter of the sleeve and smaller than the outer diameter of the lifting boss, and; the lifting ring is fixed at the upper end of the mandrel.

When the lifting tool works, the mandrel is pushed to move downwards relative to the sleeve, the mandrel drives the limiting pin to move from the upper part to the bottom part of the guide hole, the mandrel is rotated to drive the limiting pin to move circumferentially along the lower part of the guide hole, at the moment, the mandrel is axially limited relative to the sleeve, the gradually-expanding section of the mandrel extends out of the lower end of the sleeve, the inner wall of the sleeve is not in contact with the gradually-expanding section, and the lower cylinder wall of the sleeve is in a natural state; when the lifting tool is placed into a measurement while drilling instrument, manual extrusion force is applied to the lower cylinder wall of the sleeve, and the lower cylinder wall of the sleeve is provided with a plurality of axial open grooves, so that the lower cylinder wall of the sleeve shrinks radially under the action of the extrusion force, the outer diameter of the lifting boss is reduced, at the moment, the lower end of the sleeve can be placed into a water hole of the measurement while drilling instrument, the water hole is enlarged after the lifting boss of the sleeve passes through a conical shoulder of the water hole, the original diameter of the lifting boss of the sleeve is restored due to no extrusion force, and the outer diameter of the lifting boss in a natural state is slightly larger than the conical shoulder of the water hole.

And then, rotating the mandrel to enable the limiting pin to rotate out of the bottom of the guide hole, lifting the mandrel to drive the limiting pin to move to the top of the guide hole relative to the sleeve, axially limiting the mandrel and the sleeve again, transmitting force to the lifting boss of the sleeve through the internal conical shoulder of the measurement-while-drilling instrument under the action of self weight, driving the sleeve to move downwards, keeping the relative position of the mandrel unchanged under the action of the lifting ring, enabling the gradually-expanded section of the mandrel to enter the sleeve and prop open the axial open slot at the lower part of the sleeve to expand the lifting boss of the sleeve, increasing the outer diameter of the lifting boss, and firmly hanging the conical shoulder of the measurement-while-drilling instrument on the lifting boss.

And finally, placing the measurement-while-drilling instrument into the non-magnetic drill collar by using a lifting tool, positioning and placing the downward-moving limiting table of the sleeve on the end surface of the non-magnetic drill collar, tapping the lifting ring to enable the mandrel and the sleeve to slide relatively, pushing down the mandrel axially again to enable the limiting table to drive the limiting pin to move to the bottom of the guide hole, rotating the mandrel until the sleeve and the mandrel rotate together, at the moment, extending the gradually-expanded section of the mandrel out of the sleeve, shrinking the lifting boss of the sleeve to restore the original diameter, lifting the lifting ring, and at the moment, enabling the suspension force between the lifting boss of the lifting tool and the conical shoulder of the measurement-while-drilling instrument to be smaller than the gravity of the measurement-while-drilling instrument, so that the lifting boss of the sleeve shrinks, the outer diameter of the lifting boss of the sleeve becomes smaller, the lifting boss of.

Therefore, the lifting tool is matched with the limiting pin of the mandrel and the guide hole of the sleeve at different positions, when the measurement-while-drilling instrument is lifted, the gradually-expanding section is enabled to expand the lifting lug boss of the sleeve, the outer diameter of the lifting lug boss is increased, the lifting lug boss is enabled to firmly hang the conical shoulder of the measurement-while-drilling instrument, after the measurement-while-drilling instrument is placed in place, the gradually-expanding section extends out of the lower end of the sleeve, the lifting lug boss is contracted and restored to the original diameter, and the hanging force of the lifting lug boss and the conical shoulder is insufficient to lift the measurement-while-drilling instrument, so that the lifting tool is taken out. When having satisfied the suspension force, convenient dismantlement is taken out, and simple structure, the reliability is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a lifting tool according to an embodiment of the present invention;

fig. 2 is a longitudinal sectional view of a lifting tool according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a sleeve of a lifting tool according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a mandrel of a lifting tool according to an embodiment of the present invention.

Wherein, 1 is a lifting ring, 2 is a cover cap, 3 is a sleeve, 31 is a downward moving limiting platform, 32 is an axial opening groove, 33 is a lifting lug boss, 34 is a conical surface, 35 is a guide hole, 4 is a mandrel, 41 is a tapered section, 42 is a tapered section, 43 is a pin shaft hole, and 44 is a threaded hole.

Detailed Description

The core of the utility model is to provide a lifting tool, when satisfying the suspension force, made things convenient for the dismantlement.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, an embodiment of the present invention provides a lifting tool, which includes a mandrel 4, a sleeve 3, and a lifting ring 1; the upper part of the mandrel 4 is cylindrical, the lower end of the mandrel 4 is sequentially provided with a reducing section 41 and a gradually expanding section 42 along the axial direction, the reducing section 41 is connected with the gradually expanding section 42, the diameter of the large-diameter end of the gradually expanding section 42 is larger than the diameters of the rest shaft sections of the mandrel 4, the shape of the gradually expanding section 42 is similar to a horn shape, and the mandrel 4 is radially provided with a convex limiting pin; the sleeve 3 is a hollow cylindrical structure, the mandrel 4 is movably sleeved in the sleeve 3, the mandrel 4 can rotate and axially move relative to the sleeve 3, a guide hole 35 matched with the limiting pin in a guiding and limiting way is formed in the cylinder wall of the sleeve 3, the upper part of the guide hole 35 can guide the limiting pin to move up and down, so that the guide mandrel 4 axially moves relative to the sleeve 3, the lower part of the guide hole 35 can guide the limiting pin to circumferentially move, and then the guide mandrel 4 rotates relative to the sleeve 3, the outer wall of the sleeve 3 is provided with a downward movement limiting table 31 used for limiting the downward movement of the sleeve 3, the downward movement limiting table 31 is used for positioning with a non-magnetic drill collar, the lower cylinder wall of the sleeve 3 is provided with a plurality of axially open grooves 32 distributed in the circumferential direction, the axially open grooves 32 are long-strip-shaped U-shaped grooves, the outer wall of the lower end of the sleeve 3 is provided with a lifting boss 33, and the diameter, the divergent section 42 can enter the lower end of the sleeve 3 and radially outwardly expand the lower cylindrical wall of the sleeve 3; the lifting ring 1 is fixed on the upper end of the mandrel 4.

When the lifting tool works, the mandrel 4 is pushed to move downwards relative to the sleeve 3, the mandrel 4 drives the limiting pin to move to the bottom from the upper part of the guide hole 35, the mandrel 4 is rotated to drive the limiting pin to move along the circumferential direction of the lower part of the guide hole 35, at the moment, the mandrel 4 is axially limited relative to the sleeve 3, the gradually expanding section 42 of the mandrel 4 extends out of the lower end of the sleeve 3, the inner wall of the sleeve 3 is not in contact with the gradually expanding section 42, and the lower cylinder wall of the sleeve 3 is in a natural state; when the lifting tool is placed into a measurement while drilling instrument, manual extrusion force is applied to the lower cylindrical wall of the sleeve 3, and the lower cylindrical wall of the sleeve 3 is provided with the plurality of axial open grooves 32, so that the lower cylindrical wall of the sleeve 3 is radially contracted under the action of the extrusion force, the outer diameter of the lifting boss 33 is reduced, at the moment, the lower end of the sleeve 3 can be placed into a water hole of the measurement while drilling instrument, the water hole is enlarged after the lifting boss 33 of the sleeve 3 passes through a conical shoulder of the water hole, the original diameter of the lifting boss 33 of the sleeve 3 is restored due to no extrusion force, and the outer diameter of the lifting boss 33 in a natural state is slightly larger than the conical shoulder of the water hole.

Then, the mandrel 4 is rotated to enable the limiting pin to rotate out from the bottom of the guide hole 35, at the moment, the mandrel 4 is lifted upwards to drive the limiting pin to move to the top of the guide hole 35 relative to the sleeve 3, the mandrel 4 and the sleeve 3 are axially limited again, at the moment, the measurement while drilling instrument transmits force to the lifting boss 33 of the sleeve 3 through the inner conical shoulder under the action of self weight and drives the sleeve 3 to move downwards, the relative position of the mandrel 4 is kept unchanged under the lifting action of the lifting ring 1, the gradually expanding section 42 of the mandrel 4 enters the sleeve 3 and props open the axial open slot 32 at the lower part of the sleeve 3, the lifting boss 33 of the sleeve 3 is expanded, the outer diameter of the lifting boss 33 is increased, and at the moment, the conical shoulder of the measurement while drilling instrument is firmly hung on the lifting boss 33.

Finally, the measurement-while-drilling instrument is placed into the non-magnetic drill collar by using a lifting tool, the downward movement limiting table 31 of the sleeve 3 is seated on the end face of the non-magnetic drill collar and positioned, the lifting ring 1 is tapped to enable the mandrel 4 and the sleeve 3 to slide relatively, the mandrel 4 is pushed downwards again to drive the limiting pin to move to the bottom of the guide hole 35, the mandrel 4 is rotated until the sleeve 3 and the mandrel 4 rotate together, at the moment, the gradually-expanding section 42 of the mandrel 4 extends out of the sleeve 3, the lifting boss 33 of the sleeve 3 contracts to recover the original diameter, the lifting ring 1 is lifted, at the moment, the suspension force between the lifting boss 33 of the lifting tool and the conical shoulder of the measurement-while-drilling instrument is smaller than the gravity of the measurement-while-drilling instrument, and therefore, under the extrusion effect of the conical shoulder, the lifting boss 33 of the sleeve 3 contracts, the outer diameter becomes smaller, the outer diameter is lifted out of the.

It can be seen that the lifting tool is matched with the guide hole 35 of the sleeve 3 at different positions through the limiting pin of the mandrel 4, when the measurement while drilling instrument is lifted, the gradually expanding section 42 is used for expanding the lifting boss 33 of the sleeve 3, the outer diameter of the lifting boss 33 is increased, so that the lifting boss 33 is firmly hung on the conical shoulder of the measurement while drilling instrument, after the measurement while drilling instrument is placed in place, the gradually expanding section 42 extends out of the lower end of the sleeve 3, the lifting boss 33 is contracted and restored to the original diameter, and the suspension force of the lifting boss 33 and the conical shoulder is not enough to lift the measurement while drilling instrument, so that the lifting tool is taken out. When having satisfied the suspension force, convenient dismantlement is taken out, and simple structure, the reliability is high.

Further, in the present embodiment, the guide hole 35, the downward movement limiting table 31, the axial opening groove 32, and the lifting boss 33 are sequentially arranged from top to bottom in the axial direction of the sleeve 3. So set up, convenient processing. Of course, the guiding hole 35 may be disposed at other positions of the sleeve 3 as long as it can be guided and matched with the limit pin of the mandrel 4.

In this embodiment, the lifting tool further includes a cap 2, the cap 2 is provided with an axial through hole, the upper end of the mandrel 4 penetrates through the axial through hole, the cap 2 is fixedly sleeved on the outer wall of the upper portion of the sleeve 3, the cap 2 covers the guide hole 35, and the limit pin is radially inserted into the pin shaft hole 43 on the upper portion of the mandrel 4. Since the stopper pin is inserted into the pin shaft hole 43 of the spindle 4, the guide hole 35 is covered with the cap 2 in order to prevent the stopper pin from coming out of the pin shaft hole 43 and the guide hole 35. The installation process of the lifting tool comprises the following steps: the end face of the divergent section 42 of the mandrel 4 faces downwards, the divergent section is inserted from the bottom of the sleeve 3, then a limiting pin penetrates through the guide hole 35 of the sleeve 3 and the pin shaft hole 43 of the mandrel 4, and the relative position of the mandrel 4 and the sleeve 3 is fixed through the limiting pin and the guide hole 35. The mandrel 4 is constrained to move up and down and circumferentially within the sleeve 3 along the path of the guide bore 35. The cap 2 is sleeved on the outer walls of the core shaft 4 and the sleeve 3, the cap 2 is fixed on the sleeve 3, and the cap 2 covers the guide hole 35 to prevent the limiting pin from sliding out.

Of course, the cap 2 may not be provided, and the stopper pin may be inserted through the pin shaft hole 43 of the core shaft 4 and then welded or bonded to be fixed, so that the stopper pin does not come out of the pin shaft hole 43 and does not need to be blocked by the cap 2.

In this embodiment, the guiding hole 35 is an L-shaped guiding hole or a T-shaped guiding hole, and a part of the L-shaped guiding hole and the T-shaped guiding hole can axially guide the limit pin, and the other part can circumferentially guide the limit pin, so that the L-shaped guiding hole is simpler in structure, more convenient to operate, and more accurate in positioning. Of course, the guide hole 35 may also have a structure similar to an L-shaped guide hole, and the guide hole 35 is not limited to the shape exemplified in the embodiment, as long as it is capable of achieving the up-down and circumferential guiding, but is not strictly guided in the axial and circumferential directions.

Further, in the present embodiment, the lower inner cylindrical wall of the sleeve 3 is an outwardly expanding conical surface 34, so that when the diverging section 42 of the mandrel 4 extends into the lower end of the sleeve 3, the spreading range of the lower cylindrical wall of the sleeve 3 gradually increases along with the gradual extension of the diverging section 42, thereby being more beneficial to hanging the measurement while drilling instrument.

In this embodiment, the pulling boss 33 is a pulling frustum, the upper end surface of the pulling frustum is a conical surface, and since the conical shoulder in the measurement while drilling instrument is a conical surface, in order to facilitate the detachment of the pulling boss 33 from the conical shoulder when the pulling tool is taken out, the pulling boss 33 is set to be a pulling frustum having the same taper as the conical shoulder.

In this embodiment, the cap 2 is screwed on the outer wall of the upper end of the sleeve 3, so as to facilitate the assembly and disassembly of the cap 2, and of course, the cap 2 can also be fixed on the outer wall of the sleeve 3 by pressing.

In this embodiment, the lifting ring 1 is screwed into the upper threaded hole of the mandrel 4, so that the processing, manufacturing and disassembly are convenient, and the lifting rope is hung in the lifting ring 1. Of course, the bail 1 may also be welded to the upper end of the mandrel 4.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A pulling tool, comprising:

the lower end of the mandrel (4) is sequentially provided with a reducing section (41) and a gradually expanding section (42) along the axial direction, the diameter of the large-diameter end of the gradually expanding section (42) is larger than that of the rest shaft sections of the mandrel (4), and the mandrel (4) is radially provided with a limiting pin;

the sleeve (3), the mandrel (4) is movably sleeved in the sleeve (3), a guide hole (35) which is matched with the limiting pin in a guiding and limiting mode is formed in the cylinder wall of the sleeve (3), the upper portion of the guide hole (35) can guide the limiting pin to move up and down, the lower portion of the guide hole (35) can guide the limiting pin to move circumferentially, a downward moving limiting platform (31) which is used for limiting the downward movement of the sleeve (3) is arranged on the outer wall of the sleeve (3), a plurality of axial open grooves (32) which are distributed in the circumferential direction are formed in the cylinder wall of the lower portion of the sleeve (3), a lifting boss (33) is arranged on the outer wall of the lower end of the sleeve (3), the diameter of the large-diameter end of a gradually expanding section (42) of the mandrel (4) is larger than the inner diameter of the sleeve (3) and smaller than the outer diameter of the lifting boss (33), and the gradually expanding section (42) can enter the lower end of the sleeve (3) and radially A lower cylindrical wall;

the lifting ring (1) is fixed at the upper end of the mandrel (4).

2. The pulling tool according to claim 1, wherein the guide hole (35), the downward movement limiting table (31), the axial opening groove (32) and the pulling boss (33) are sequentially arranged from top to bottom along the axial direction of the sleeve (3).

3. The pulling tool according to claim 2, further comprising a cap (2), wherein the cap (2) is provided with an axial through hole, the upper end of the mandrel (4) passes through the axial through hole, the cap (2) is fixedly sleeved on the outer wall of the upper portion of the sleeve (3), the cap (2) covers the guide hole (35), and the limit pin is radially inserted and arranged in a pin shaft hole (43) in the upper portion of the mandrel (4).

4. The pulling tool according to claim 1, wherein the guide hole (35) is an L-shaped guide hole or a T-shaped guide hole.

5. Pulling tool according to claim 1, characterized in that the lower inner cylinder wall of the sleeve (3) is an outwardly flared conical surface (34).

6. The pulling tool according to claim 1, wherein the pulling boss (33) is a pulling frustum, and an upper end surface of the pulling frustum is a tapered surface.

7. The pulling tool according to claim 3, characterized in that the cap (2) is screwed to the upper outer wall of the sleeve (3).

8. The pulling tool according to claim 1, characterized in that the bail (1) is screwed to the upper end of the mandrel (4).

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