CN205532383U - Slips device and rig - Google Patents

Abstract

The utility model discloses a slips device and rig. The slips device includes slip spider and slips assembly, and the slips assembly has a glide plane, and the slip spider has a fitting surface, and the fitting surface includes two at least cooperation portions, the glide plane selectively with at least two cooperation portions in a sliding fit, the control range of the centre gripping latus rectum when every cooperation portion in two at least cooperation portions enables the control range of the centre gripping latus rectum of slips assembly during with glide plane sliding fit the part is different from other cooperation portions with the glide plane cooperation at least, perhaps, the glide plane includes two at least sliding parts, the fitting surface selectively with at least two sliding parts in a sliding fit, the control range of the centre gripping latus rectum when every sliding part in two at least sliding parts enables the control range of the centre gripping latus rectum of slips assembly during with fitting surface sliding fit the part is different from other sliding parts with the fitting surface cooperation at least. The utility model discloses a slips device has increased the control range of its centre gripping latus rectum.

Description

Slips device and rig

Technical Field

The utility model relates to an engineering machine tool field, in particular to slips device and rig.

Background

The slip device is a core component in the drilling operation process of the drilling machine, plays a role in clamping and bearing a drilling tool in a well, and is the key for safely carrying out the drilling operation.

As shown in fig. 1, the slip apparatus 2' of the prior art includes a slip bowl 21' and a plurality of slip units 22 '. The slip unit 22' includes, among other things, a slip body 221' and slip elements 222 '. Because the adjusting range of the clamping drift diameter of the slip device 2' in the prior art is small, when different drilling tools are clamped, the slip body 221' or even the whole slip device 2' needs to be replaced, and the working efficiency is reduced. Therefore, the slip device 2' in the prior art has the problem of small adjustment range of the clamping drift diameter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a slips device and rig aims at increasing the control range of the centre gripping latus rectum of slips device.

The utility model provides a slip device in a first aspect, which comprises a slip seat and a slip assembly, wherein the slip seat is provided with a cavity, the slip assembly comprises a plurality of slip units arranged in the cavity, the slip assembly is provided with a sliding surface, the slip seat is provided with a matching surface arranged on the side wall of the cavity, the matching surface is in sliding fit with the sliding surface so as to enable the slip units to be close to or far away from each other to realize the adjustment of the clamping path of the slip assembly,

The matching surface comprises at least two matching parts, and the sliding surface can be selectively in sliding fit with one of the at least two matching parts, wherein when each matching part in the at least two matching parts is in sliding fit with the sliding surface, the adjusting range of the clamping drift diameter of the slip assembly is at least partially different from the adjusting range of the clamping drift diameter when other matching parts are matched with the sliding surface; or,

the slip surface includes at least two slip portions, and the mating surface is selectively in sliding engagement with one of the at least two slip portions, wherein each of the at least two slip portions when in sliding engagement with the mating surface enables an adjustment range of the grip diameter of the slip assembly to be at least partially different from an adjustment range of the grip diameter of the other slip portions when in mating engagement with the mating surface.

Further, the sliding surface comprises a first sliding portion, the at least two matching portions comprise a first matching portion and a second matching portion arranged on the radial outer side of the first matching portion, and the first matching portion and the second matching portion can be in sliding fit with the first sliding portion respectively.

Further, the sliding surface further includes a second sliding portion located radially inside the first sliding portion, the second sliding portion being in sliding engagement with the first engaging portion when the first sliding portion is in sliding engagement with the second engaging portion.

Furthermore, the sliding surface comprises a first curved surface arranged on the radial outer side of each slip unit, the side wall of the cavity comprises a conical surface and a plurality of strip-shaped grooves which are arranged on the conical surface and extend along the central axis of the slip device, the first matching parts are positioned on the conical surface between the strip-shaped grooves, the second matching parts are positioned on the bottom surface of each strip-shaped groove, and the first curved surface is selectively in sliding fit with the conical surface and the bottom surface.

Furthermore, the sliding surface further comprises second curved surfaces arranged on the radial outer sides of the slip units, the second curved surfaces are located on the two circumferential sides of the first curved surface and located on the radial inner side of the first curved surface, and when the first curved surface is in sliding fit with the bottom surface, the second curved surfaces are in sliding fit with the conical surface.

Further, the slips device still includes the dog, and the up end that is located the radial outside in bar groove of slip seat is equipped with the dog groove, and the dog cooperates in order to release the bar groove with the slips unit with the dog groove.

Furthermore, all the strip-shaped grooves are uniformly arranged at intervals.

Furthermore, the fitting surface comprises a first fitting portion, the at least two sliding portions comprise a first sliding portion and a second sliding portion arranged on the radial outer side of the first sliding portion, and the first sliding portion and the second sliding portion can be in sliding fit with the first fitting portion respectively.

Further, the lateral wall of cavity includes the conical surface and sets up a plurality of bar grooves that extend along slips device's the central axis on the conical surface, first cooperation portion is including being located the conical surface between each bar groove, first sliding part is including setting up in the first curved surface in the radial outside of each slips unit, second sliding part is including setting up in the radial outside of each slips unit and being located the circumference both sides of the first curved surface of place slips unit and being located the radial inboard second curved surface of first curved surface, the conical surface optionally with first curved surface and second curved surface sliding fit.

Further, the slip device also comprises a base, wherein the slip assembly and the slip seat are arranged on the base, and the slip seat is rotatably arranged relative to the base so that the matching surface can be selectively in sliding fit with one of the at least two sliding parts or the sliding surface can be selectively in sliding fit with one of the at least two matching parts.

Furthermore, the slip seat comprises a disc structure, an annular boss is arranged at the lower part of the disc structure, an annular groove is arranged at the upper part of the base, and the annular boss and the annular groove form a rotary motion pair.

Furthermore, the slip device further comprises a rotation driving device arranged between the slip seat and the base, and the rotation driving device can drive the slip seat to rotate relative to the base.

Furthermore, the slip device also comprises a lifting driving device which can drive the slip assembly to ascend or descend so as to realize the mutual approaching or departing of the slip units.

A second aspect of the present invention provides a drilling machine, including the slip device provided by the first aspect of the present invention.

Based on the utility model provides a slips device, including slips seat and slips assembly, the slips seat has the cavity, the slips assembly is including locating a plurality of slips units in the cavity, the slips assembly has the glide plane, the slips seat has the fitting surface that sets up on the lateral wall of cavity, fitting surface and glide plane sliding fit so that a plurality of slips units can be close to each other or keep away from in order to realize the regulation of the centre gripping latus rectum of slips assembly, wherein, the fitting surface includes two at least cooperation portions, the glide plane optionally with one sliding fit in two at least cooperation portions, wherein, can make the accommodation range of the centre gripping latus rectum of slips assembly at least partially be different from the accommodation range of the centre gripping latus rectum when other cooperation portions cooperate with the glide plane when each cooperation portion in two at least cooperation portions and glide plane sliding fit; alternatively, the slip surface includes at least two slip portions, and the mating surface is selectively in sliding engagement with one of the at least two slip portions, wherein each of the at least two slip portions in sliding engagement with the mating surface enables the slip assembly to have a grip path adjustment range that is at least partially different from the grip path adjustment range of the other slip portions in mating engagement with the mating surface. The sliding surface and the matching surface are selectively matched, so that the slip device can select the adjusting range of the clamping drift diameter of the slip assembly according to the diameter of a drilling tool needing to be clamped. Compared with the prior art, the adjusting range of the clamping drift diameter of the slip assembly of the slip device is enlarged.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a schematic diagram of a slip assembly of the prior art;

FIG. 2 is a schematic view of the installation of a slip assembly according to a first embodiment of the present invention;

FIG. 3 is a schematic semi-sectional structural view of the slip assembly of FIG. 2;

FIG. 4 is a schematic illustration of the slip assembly of FIG. 2;

FIG. 5 is a schematic view of a support plate of the slip assembly of FIG. 2;

FIG. 6 is a schematic diagram of the slip assembly of FIG. 2 shown in a low-gage gripping configuration with the support plates removed;

FIG. 7 is a cross-sectional structural schematic view of the slip apparatus of FIG. 6;

FIG. 8 is a schematic diagram of the slip assembly of FIG. 2 shown in a large-diameter gripping configuration with the support plates removed;

FIG. 9 is a cross-sectional schematic view of the slip assembly of FIG. 8;

FIG. 10 is a schematic structural view of the slip bowl of FIG. 2;

FIG. 11 is a schematic cross-sectional view of the slip bowl of FIG. 2;

FIG. 12 is a schematic cross-sectional view of the slip unit of FIG. 2;

FIG. 13 is a schematic cross-sectional view of the slip body of FIG. 12;

FIG. 14 is a schematic top view of the slip body of FIG. 12;

FIG. 15 is a schematic view of a stop of the slip assembly of FIG. 2;

FIG. 16 is a schematic illustration of a base of the slip assembly of FIG. 2;

FIG. 17 is a schematic top view of the base of FIG. 16;

FIG. 18 is a schematic view of the construction of the annular mounting plate of the base of FIG. 16;

fig. 19 is a sectional structure view of the connecting rod of fig. 2.

Each reference numeral represents:

2' -a slip device; 21' -a slip bowl; 22' -a slip unit; 221' -a slip body; 222' -slip teeth; 1-a workbench; 2-a slip device; 21-a slip bowl; 211-a chamber; 211A-cone; 211B-bottom surface; 211C-stop groove; 212-disc configuration; 212A-annular boss; 213-hinge ear; 22-a slip unit; 221-a slip body; 221A-first curved surface; 221B-second curved surface; 221D-hinge eyes; 222-slip teeth; 223-cover plate; 23-a stopper; 24-a base; 241-a ring-shaped mounting plate; 241A-annular groove; 242-an annular pallet; 243-supporting vertical plates; 244-a tray; 245-a bent plate; 246-hinge eyes; 25-a rotation drive; 26-a lift drive; 27-a connecting rod; 28-a nut; 29-a support plate; 291-hinge ear.

Detailed Description

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the following description, "radially inner" and "radially outer" both refer to radially inner and radially outer sides with respect to a central axis of the slip apparatus.

The utility model discloses slips device of each embodiment includes slip bowl and slips assembly. The slip seat is provided with a cavity, and the slip assembly comprises a plurality of slip units arranged in the cavity. The slip assembly has a slip surface and the slip bowl has a mating surface disposed on a sidewall of the cavity. The mating surface is in sliding engagement with the sliding surface to enable the plurality of slip units to move toward and away from each other to effect adjustment of the gripping path of the slip assembly.

The matching surface comprises at least two matching parts, and the sliding surface can be selectively in sliding fit with one of the at least two matching parts, wherein when each matching part of the at least two matching parts is in sliding fit with the sliding surface, the adjusting range of the clamping drift diameter of the slip assembly is at least partially different from the adjusting range of the clamping drift diameter when other matching parts are matched with the sliding surface.

Alternatively, the slip surface includes at least two slip portions, and the mating surface is selectively in sliding engagement with one of the at least two slip portions, wherein each of the at least two slip portions in sliding engagement with the mating surface enables the slip assembly to have a grip path adjustment range that is at least partially different from the grip path adjustment range of the other slip portions in mating engagement with the mating surface.

The sliding surface and the matching surface are selectively matched, so that the slip device can select the adjusting range of the clamping drift diameter of the slip assembly according to the diameter of a drilling tool needing to be clamped. Compared with the prior art, the adjusting range of the clamping drift diameter of the slip assembly of the slip device is enlarged.

First embodiment

The structure of the slip device 2 according to the first embodiment of the present invention will be described in detail with reference to fig. 2 to 19.

As shown in fig. 2, the slip device 2 of the present embodiment is mounted on a table 1.

As shown in fig. 3 and 4, the slip apparatus 2 includes a slip bowl 21 and a slip assembly. Wherein, the slip bowl 21 has a cavity 211, and the slip assembly comprises a plurality of slip units 22 disposed in the cavity 211.

Preferably in this embodiment, the sliding surface includes a first sliding portion. The at least two matching parts comprise a first matching part and a second matching part arranged on the radial outer side of the first matching part. The first matching part and the second matching part can be in sliding fit with the first sliding part respectively.

Specifically, as shown in fig. 10 and 11, the sidewall of the cavity 211 of the slip bowl 21 includes a tapered surface 211A and a plurality of strip-shaped grooves formed on the tapered surface and extending along the central axis of the slip device 2. The first engaging portion is provided on the tapered surface 211A between the respective grooves. The second mating portion is located on the bottom surface 211B of the bar groove.

Preferably, the strip-shaped grooves are uniformly spaced.

As shown in fig. 12 and 13, the slip unit 22 includes a slip body 221 and slip elements 222, and a groove structure is provided at a radially inner side of the slip body 221 for installing the slip elements 222. The slip unit 22 also includes a cover plate 223 for securing the slip elements 222. As shown in fig. 14, in the present embodiment, the slip body 221 has a fan-shaped horizontal cross section.

As shown in fig. 13, the first sliding portion is a first curved surface 221A provided on the radial outer side of the slip body 221.

In this embodiment, the tapered surface 211A and the bottom surface 211B can be slidably engaged with the first curved surface 221A, respectively. The mating relationship between the tapered surface 211A and the bottom surface 211B of the slip bowl 21 and the first curved surface 221A of the slip unit 22 will be described in detail with reference to fig. 6 to 9.

As shown in fig. 6 and 7, the slip assembly has a relatively small grip path adjustment range when the tapered surface 211A is slidably engaged with the first curved surface 221A.

As shown in fig. 8 and 9, the slip assembly has a relatively large adjustment range for the grip path when the bottom surface 211B is slidably engaged with the first curved surface 221A.

In summary, the sliding surface of the slip device 2 of the first embodiment is in sliding fit with the different fitting portions, so that the slip assembly has different adjustment ranges of the holding diameter, and the adjustment range of the holding diameter of the slip assembly is increased.

Additionally, compared with the prior art, the utility model discloses slips device 2 of embodiment need not change the slip body 221 of slips unit 22 just can realize the bigger control range of centre gripping latus rectum, has reduced intensity of labour, has improved work efficiency.

Further preferably in this embodiment, the sliding surface further includes a second sliding portion located radially inside the first sliding portion, and the second sliding portion is slidably engaged with the first engaging portion when the first sliding portion is slidably engaged with the second engaging portion.

Specifically, in the present embodiment, as shown in fig. 7 and 13, the second sliding portion is a second curved surface 221B provided on the radially outer side of the slip body 221, and the second curved surface 221B is located on both circumferential sides of the first curved surface 221A and on the radially inner side of the first curved surface.

In this embodiment, the depth of the groove is equal to the radial distance from the first curved surface 221A to the second curved surface 221B, so that when the first curved surface 221A is slidably engaged with the bottom surface 211B, the second curved surface 221B is also slidably engaged with the tapered surface 211A.

The first curved surface 221A is in sliding fit with the bottom surface 211B, and the second curved surface 221B is in sliding fit with the tapered surface 211A, so that the slip units 22 move closer to or farther away from each other more stably, and the stability of the slip device 2 is improved.

Preferably, in this embodiment, the slip device 2 further comprises a stop 23. Accordingly, as shown in fig. 10, the upper end surface of the slip bowl 21 located radially outside the bar groove is provided with a stopper groove 211C for placing the stopper 23. The stopper 23 cooperates with the stopper groove 211C to push the slip unit 22 out of the bar groove.

Preferably, as shown in fig. 15, the stopper 23 has a fan-shaped sectional shape.

As shown in fig. 3, the slip apparatus 2 further includes a base 24. The slip bowl 21 and slip assembly are both mounted on the base 24. The slip bowl 21 is rotatably disposed relative to the base 24 such that the slip assembly and slip bowl 21 rotate relative to each other to selectively slidably engage the engagement surface with one of the at least two sliding portions or to selectively slidably engage the sliding surface with one of the at least two engagement portions.

Specifically, in the present embodiment, as shown in fig. 16 and 17, the base 24 includes a ring-shaped mounting plate 241. And as shown in fig. 18, an annular groove 241A is provided on the annular mounting plate 241.

Accordingly, as shown in FIG. 11, the slip bowl 21 includes a disc structure 212, and an annular boss 212A is provided at a lower portion of the disc structure 212. The annular boss 212A cooperates with the annular groove 241A to form a rotational kinematic pair.

In order to reduce the working strength and improve the automation degree of the slip device, as shown in fig. 3, a rotation driving device 25 is provided between the slip bowl 21 and the base 24, and the rotation driving device 25 can drive the slip bowl 21 to rotate relative to the base 24.

In the present embodiment, the rotation driving device 25 is a rotary telescopic cylinder. As shown in fig. 7 and 17, the cylinder end of the rotary telescopic cylinder is hinged to the hinge lug 246 of the base 24, and the piston end of the rotary telescopic cylinder is hinged to the hinge lug 213 of the slip seat 21.

As shown in fig. 7, when the piston of the rotary telescopic cylinder is fully retracted, the first curved surface 221A of the slip unit 22 is in sliding engagement with the tapered surface 211A on the slip bowl 21, which enables a relatively small adjustment range of the grip diameter.

As shown in fig. 9, when the piston of the rotary telescopic cylinder extends, the slip seat 21 is driven to rotate by a certain angle, the slip unit 22 enters the strip-shaped groove, the first curved surface 221A is in sliding fit with the bottom surface 211B, and the second curved surface 221B is also in sliding fit with the conical surface 211A. A relatively large adjustment range of the clamping path can be achieved in this case.

Preferably, the slip apparatus 2 further includes a lifting driving apparatus 26, and the lifting driving apparatus 26 drives the plurality of slip units 22 to ascend or descend to achieve the approaching or departing of each slip unit 22.

In the present embodiment, the lift driving device 26 is a lift telescopic cylinder.

To fixedly mount the rod end of the piston lifting the compression cylinder, the slip assembly 2 further includes a support plate 29, as shown in fig. 4. The supporting plate 29 is a blade-shaped flat plate structure as shown in fig. 5, and has 3 through holes uniformly formed thereon for fixedly mounting the rod end of the lifting telescopic cylinder through the nuts 28.

And the cylinder end of the lifting telescopic cylinder is fixedly connected with the base 24.

As shown in fig. 16 and 17, the base 24 further includes an annular supporting plate 242, a supporting vertical plate 243, a tray 244 and a bending plate 245. The number of the supporting vertical plates 243, the number of the trays 244 and the number of the bending plates 245 are all three, and the supporting vertical plates, the trays 244 and the bending plates are all uniformly arranged relative to the central axis of the base 24. The supporting riser 243 is welded between the annular mounting plate 241 and the annular support plate 242. The tray 244 is welded to the annular backing plate 242. The bent plate 245 is welded to the inner side of the vertical supporting plate 243. The cylinder end of the lifting telescopic cylinder is fixed on an annular supporting plate 242 of the base 24 through a bending plate 245 and a tray 244.

In order to enable the lifting telescopic cylinder to transmit power to the slip unit 22 so as to drive the slip unit 22 to ascend or descend, the slip device 2 further comprises a connecting rod 27 arranged between the supporting plate 29 and the slip unit 22, and the structure of the connecting rod 27 is shown in fig. 19. As shown in fig. 3, the support plate 29 is connected to the slip unit 22 by links 27. The telescopic movement of the lifting telescopic cylinder drives the support plate 29 to move up and down, the support plate 29 transmits power to the slip units 22 through the connecting rods 27, and the multiple slip units 22 are close to or far away from each other.

In the present embodiment, the connection relationship between the support plate 29, the link 27 and the slip unit 22 is as follows:

the supporting plate 29 is provided with a hinge eye 291, and the supporting plate 29 is connected with the connecting rod 27 through the hinge eye 291. As shown in fig. 13, the link 27 is connected to the slip unit 22 through a hinge lug 221D provided on the slip body 221.

The assembly method of the slip device 2 in this embodiment is as follows:

the three lifting telescopic cylinders are respectively arranged on a tray 244 of the base 24 and are fixed by a bending plate 245 and a bolt; the slip bowl 21 is installed into the base 24 such that the annular boss 212A of the slip bowl 21 is fitted with the annular groove 241A of the base 24; assembling the slip body 221, the slip teeth 222 and the cover plate 223 into the slip units 22, and uniformly placing the six slip units 22 into the cavity 211 of the slip bowl 21; installing the support plate 29, enabling the through hole in the support plate 29 to be attached to the piston rod end of the lifting telescopic cylinder, and then screwing the nut 28; connecting the support plate 29 and the slip unit 22 with a connecting rod 27 and a bolt; the cylinder end of the rotary telescopic cylinder is hinged with a hinge lug 246 on the base 24, and the piston rod end is hinged with a hinge lug 213 on the slip seat 21.

Second embodiment

In a second embodiment, the sliding surface includes a first sliding portion, the at least two engaging portions include a first engaging portion and a second engaging portion disposed radially outward of the first engaging portion, and the first engaging portion and the second engaging portion are respectively capable of sliding engagement with the first sliding portion.

Similar to the first embodiment, the sidewall of the cavity of the slip bowl includes a tapered surface and a plurality of strip grooves disposed on the tapered surface that extend along the central axis of the slip assembly. The first matching part is arranged on the conical surface between the strip-shaped grooves. The second matching part is positioned on the bottom surface of the strip-shaped groove. The first sliding portion is provided on the first curved surface on the radially outer side of the slip body 221.

Different from the first embodiment, the depth of the strip-shaped groove on the cavity of the slip seat can be set according to the actual requirement of the slip device on the adjustment range of the clamping drift diameter, and the radial outer side of the slip body is only provided with the first curved surface.

The first curved surface can be selectively matched with the conical surface or the bottom surface in a sliding way.

When the first curved surface is matched with the conical surface, the slip assembly has a relatively small adjusting range of the clamping drift diameter. When the slip unit enters the strip-shaped groove, the first curved surface is matched with the bottom surface, and the slip assembly has a relatively large adjusting range for clamping the drift diameter.

The first embodiment can be referred to for other slip devices not described in the second embodiment in terms of structure, function, effect, and the like.

Third embodiment

In a third embodiment, the mating surface includes a first mating portion, the at least two sliding portions include a first sliding portion and a second sliding portion disposed radially outside the first sliding portion, and the first sliding portion and the second sliding portion are respectively capable of sliding mating with the first mating portion.

In a third embodiment, the sidewall of the cavity of the slip bowl includes a tapered surface and a plurality of grooves disposed on the tapered surface that extend along a central axis of the slip assembly. The first matching part is arranged on the conical surface between the strip-shaped grooves.

The first sliding part is a first curved surface arranged on the radial outer side of the slip body, the second sliding part is a second curved surface arranged on the radial outer side of the slip body, and the second curved surface is located on the two circumferential sides of the first curved surface and located on the radial inner side of the first curved surface.

Different from the first embodiment, the depth of the strip-shaped groove is larger than the radial distance from the first curved surface to the second curved surface.

The conical surface can be selectively in sliding fit with the first curved surface or the second curved surface.

When the conical surface is in sliding fit with the first curved surface, the slip assembly has a relatively small adjusting range of the clamping drift diameter. When the slip unit enters the strip-shaped groove, the conical surface is matched with the second curved surface, and the slip assembly has a relatively large adjusting range for clamping the drift diameter.

The first embodiment can be referred to for other structures, functions, effects, and the like of the slip device of the third embodiment which are not described.

The slip teeth of the slip units in the above embodiments can be replaced, thereby achieving a wider range of adjustment of the gripping drift diameter of the slip device.

In other embodiments not shown in the drawings, more than two fitting portions may be further provided on the slip bowl, for example, three fitting portions having different distances from the central axis of the slip device, specifically, two sets of strip-shaped grooves having different depths may be provided on the side wall of the cavity of the slip bowl, and the sliding portion of the slip unit may be selectively in sliding fit with one of the three fitting portions to increase the adjustment range of the holding drift diameter of the slip assembly.

In summary, the slip surface and the mating surface of the slip device according to various embodiments of the present invention are selectively engaged with each other, so that the slip device can select the adjustment range of the clamping drift diameter of the slip assembly according to the diameter of the drilling tool to be clamped. Compared with the prior art, the adjusting range of the clamping drift diameter of the slip assembly of the slip device is enlarged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (14)

1. A slip device, comprising: the slip bowl (21) is provided with a cavity (211), the slip assembly comprises a plurality of slip units (22) arranged in the cavity (211), the slip assembly is provided with a sliding surface, the slip bowl (21) is provided with a matching surface arranged on the side wall of the cavity (211), the matching surface is in sliding fit with the sliding surface so that the slip units (22) can be close to or far away from each other to realize the adjustment of the clamping drift diameter of the slip assembly, wherein,

the matching surface comprises at least two matching parts, and the sliding surface can be selectively matched with one of the at least two matching parts in a sliding mode, wherein when each matching part of the at least two matching parts is matched with the sliding surface in a sliding mode, the adjustment range of the clamping drift diameter of the slip assembly is enabled to be at least partially different from the adjustment range of the clamping drift diameter when other matching parts are matched with the sliding surface; or,

the sliding surface comprises at least two sliding parts, and the mating surface is selectively in sliding fit with one of the at least two sliding parts, wherein each sliding part of the at least two sliding parts can enable the adjustment range of the clamping drift diameter of the slip assembly to be at least partially different from the adjustment range of the clamping drift diameter of the other sliding parts when the sliding parts are matched with the mating surface.

2. The slip apparatus of claim 1, wherein the sliding surface comprises a first sliding portion, the at least two engagement portions comprise a first engagement portion and a second engagement portion disposed radially outward of the first engagement portion, and the first engagement portion and the second engagement portion are each slidably engageable with the first sliding portion.

3. The slip apparatus of claim 2, wherein the sliding surface further comprises a second sliding portion radially inward of the first sliding portion, the second sliding portion being in sliding engagement with the first engagement portion when the first sliding portion is in sliding engagement with the second engagement portion.

4. The slip apparatus of claim 2, wherein the sliding surface comprises a first curved surface (221A) disposed radially outward of each slip unit, the sidewall of the cavity (211) comprises a tapered surface (211A) and a plurality of strip grooves disposed on the tapered surface (211A) and extending along a central axis of the slip apparatus, the first engaging portion is disposed on the tapered surface (211A) between the strip grooves, the second engaging portion is disposed on a bottom surface (211B) of each strip groove, and the first curved surface (221A) is selectively slidably engaged with the tapered surface (211A) and the bottom surface (211B).

5. The slip apparatus of claim 4, wherein the sliding surface further comprises a second curved surface (221B) disposed radially outward of each slip unit, each second curved surface (221B) is disposed circumferentially opposite to the first curved surface (221A) of the slip unit (22) and radially inward of the first curved surface (221A), and the second curved surface (221B) is slidably engaged with the tapered surface (211A) when the first curved surface (221A) is slidably engaged with the bottom surface (211B).

6. The slip arrangement according to claim 4, further comprising a stop (23), wherein an upper end surface of the slip bowl (21) located radially outside the bar groove is provided with a stop groove (211C), and wherein the stop (23) cooperates with the stop groove (211C) to push the slip unit (22) out of the bar groove.

7. The slip assembly of claim 4, wherein each of the plurality of elongated grooves are evenly spaced.

8. The slip apparatus of claim 1, wherein the engagement surface comprises a first engagement portion, the at least two sliding portions comprise a first sliding portion and a second sliding portion disposed radially inward of the first sliding portion, and the first sliding portion and the second sliding portion are each slidably engageable with the first engagement portion.

9. The slip apparatus of claim 8, wherein the side wall of the cavity (211) comprises a tapered surface (211A) and a plurality of grooves extending along a central axis of the slip apparatus provided on the tapered surface (211A), the first matching part comprises the conical surfaces (211A) positioned between the strip-shaped grooves, the first sliding part comprises first curved surfaces (221A) arranged on the radial outer sides of the slip units (22), the second sliding part comprises a first curved surface (221A) and a second curved surface (221B), the first curved surface (221A) is arranged on the radial outer side of each slip unit (22) and is positioned on the two circumferential sides of the first curved surface (221A) of the slip unit (22), the second curved surface (221B) is positioned on the radial inner side of the first curved surface (221A), the tapered surface (211A) can be selectively in sliding fit with the first curved surface (221A) and the second curved surface (221B).

10. The slip arrangement according to any one of claims 1 to 9, further comprising a base (24), wherein the slip assembly and the slip bowl (21) are both provided on the base (24), wherein the slip bowl (21) is rotatably arranged relative to the base (24) such that the engagement surface is selectively in sliding engagement with one of the at least two sliding portions or such that the sliding surface is selectively in sliding engagement with one of the at least two engagement portions.

11. The slip arrangement of claim 10, wherein the slip bowl (21) comprises a disc structure (212), wherein a lower portion of the disc structure (212) is provided with an annular boss (212A), and an upper portion of the base (24) is provided with an annular groove (241A), wherein the annular boss (212A) and the annular groove (241A) form a rotational kinematic pair.

12. Slip arrangement according to claim 10, further comprising a rotational drive (25) arranged between the slip bowl (21) and the base (24), the rotational drive (25) being capable of rotating the slip bowl (21) relative to the base (24).

13. The slip arrangement according to any one of claims 1 to 9, further comprising a lift drive (26), the lift drive (26) being capable of raising and lowering the slip assembly to effect movement of the slip units (22) towards and away from each other.

14. A drilling rig, characterized in that the drilling rig comprises a slip arrangement according to any of claims 1-13.