Slip with lining capable of being rapidly replaced

Abstract

The utility model provides a slip with a lining capable of being replaced quickly, which relates to the technical field of petroleum drilling and comprises a slip body component and a lining component, and the lining component is inserted into the slip body component. The slip body assembly is a three-piece type universal slip body and comprises a dovetail block, a plunger latch and a plunger latch pin which are arranged on the slip body, a spring is arranged between each slip body and the plunger latch, and the plunger latch rotates around the plunger latch pin; a dovetail groove matched with the dovetail block is formed in the outer conical surface of the lining assembly, and the dovetail groove is used for rapidly inserting the lining assembly into the dovetail block of the slip body and locking the lining assembly after the plunger latch is pushed open. According to the utility model, the structure is simple and practical, a left, middle and right three-piece type general slip body structure is adopted, an insertion type structure is designed, and pipe columns with different pipe diameters are clamped by replacing lining components with different specifications, so that the lining components are convenient to replace, unique falling locking and lifting releasing functions are realized, and hidden dangers caused by easy-to-loosen parts such as bolts and pins are eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil drilling, specifically, a slip with replaceable inner liner. BACKGROUND

[0002] The current slip used in the process of oil and gas field downhole casing operation, the tooth plate is directly installed in the slip body, and is fixed by bolts or pins, when clamping different pipe diameters, the slip body needs to be removed first, and then the tooth plate is replaced, which is time-consuming and laborious, and very troublesome, and the bolts and pins and other loose parts for fixing the tooth plate can also cause hidden troubles. Therefore, a new technical solution is needed to solve the above problems. SUMMARY

[0003] The utility model discloses a kind of slips with replaceable inner liner, to solve the problem one and multiple problems raised in the above background technology.

[0004] To achieve the above object, the present application provides a kind of slips with replaceable inner liner, including slip body component and inner liner component, inner liner component inserts the inside of slip body component;Slip body component is three-piece general slip body, including mounting on the dovetail block of slip body, latch and latch pin, spring is mounted between each slip body and latch, latch rotates around latch pin;

[0005] The outer conical surface of inner liner component is provided with dovetail groove matched with dovetail block, and the dovetail groove is used to quickly insert the dovetail block of slip body and lock after the latch is opened.

[0006] As a kind of realizable preferred mode, inner liner component includes inner liner, stop block, trigger and tooth plate, trigger is fixed on inner liner by stop block, and tooth plate is mounted on the surface of inner liner.

[0007] As a kind of realizable preferred mode, when inner liner component is inserted into slip body, inner liner is locked by latch;When the trigger of inner liner component is lifted, the inner liner component can be taken out after the latch is opened by trigger.

[0008] As a kind of realizable preferred mode, slip body component includes left slip body, middle slip body and right slip body, left slip body and right slip body are connected with middle slip body by hinge pin.

[0009] Compared with prior art, the utility model has the advantages that:

[0010] The utility model has the advantages that: the structure is simple and practical, adopts three-piece general slip body structure of left, middle and right, and designs plug-in structure, clamps pipe column of different pipe diameters by replacing inner liner component of different specifications, the inner liner component is convenient to replace, realizes unique "falling down locking, lifting releasing" function, and eliminates hidden troubles caused by bolts and pins and other loose parts. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A slip structure with quick replaceable inner liner provided by the utility model shows a schematic diagram;

[0012] Figure 2 A slip in the slip structure with quick replaceable inner liner provided by the utility model shows a plan view;

[0013] Figure 3 A slip body assembly in the slip structure with quick replaceable inner liner provided by the utility model shows a structural schematic diagram;

[0014] Figure 4 A slip body assembly in the slip structure with quick replaceable inner liner provided by the utility model shows a plan view structural schematic diagram;

[0015] Figure 5 An inner liner assembly in the slip structure with quick replaceable inner liner provided by the utility model shows a structural schematic diagram;

[0016] Figure 6 An inner liner assembly in the slip structure with quick replaceable inner liner provided by the utility model shows another angle structural schematic diagram. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] It should be noted that all the "first", "second", "third" and "fourth" expressions in the embodiments of the utility model are used to distinguish two same name different entities or different parameters. It can be seen that "first", "second", "third" and "fourth" are only for the convenience of description, and should not be understood as the limitation of the embodiments of the utility model. The subsequent embodiments will not be described one by one.

[0019] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as the limitation of the protection scope of the utility model.

[0020] As Figures 1-6 shown, the utility model provides a quick replaceable slip, especially suitable for the slip used in casing running operation process, the structure includes slip body assembly 3 and lining assembly 4, lining assembly 4 inserts the inside of slip body assembly 3, slip body assembly 3 is three-piece general slip body, is connected by two hinge pins. Slip body assembly 3 is left, middle, right three-piece general slip, left slip body 3.9 and right slip body 3.6 are connected with middle slip body 3.5 respectively through hinge pin 3.7. Different specifications lining assembly can be inserted into general slip body, and the lining of lining assembly is provided with a jaw plate. The slip body assembly 3 of the application is connected with an actuating mechanism 2, which controls the lifting of the slip body and realizes the loosening and clamping of the pipe string. The actuating mechanism includes left and right power cylinders, which are connected with the corresponding slip body through synchronous shafts and swing arms, thereby ensuring the synchronization of the power cylinder operation. It should be noted that the slip of the application is installed in a turntable and flush with the drilling platform, with a very small height exposed from the turntable, thereby saving the working space of the drilling platform and eliminating the work platform for centralizing and operating the power tong in casing running operation.

[0021] As shown, the slip body assembly 3 includes dovetail blocks 3.4, latches 3.1 and latch pins 3.2 installed on the slip body, a spring 3.3 is installed between each slip body and the latch 3.1, and the latch 3.1 rotates around the latch pin 3.2. It should be noted that the lining assembly 4 includes a lining 4.3, a stop block 4.2, a trigger 4.1 and a jaw plate 4.4, the trigger 4.1 is fixed on the lining 4.3 through the stop block 4.2 and can slide up and down for a distance, and the surface of the lining is provided with the jaw plate 4.4. Thus, different pipe diameters of the pipe string can be clamped by replacing the lining assembly of different specifications.

[0022] The outer conical surface of the lining assembly 4 is provided with a dovetail groove matched with the dovetail block 3.4, which is used to quickly insert the lining assembly 4 into the dovetail block 3.4 of the slip body and lock after the latch 3.1 is pulled. Therefore, when the lining assembly 4 is inserted into the slip body, the lining 4.3 is locked by the latch 3.1, and when the trigger 4.1 of the lining assembly is lifted, the latch 3.1 is smoothly removed after being pushed open by the trigger 4.1. The slip is provided with a general slip body assembly and adopts an insertion structure, so that when clamping different pipe diameters, the operator can directly replace the lining assembly to achieve quick, convenient, safe and reliable replacement of the lining assembly, reduce the labor intensity of the workers and improve the safety and reliability of the operation and the efficiency of the drilling machine.

[0023] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A quickly replaceable liner slip characterized in that, It comprises a slip body assembly (3) and an inner liner assembly (4) which is inserted into the inside of the slip body assembly (3); The slip body assembly (3) is a three-piece universal slip body which comprises dovetail blocks (3.4) installed on the slip body, a latch (3.1) and a latch pin (3.2), and a spring (3.3) is installed between each slip body and the latch (3.1), and the latch (3.1) rotates around the latch pin (3.2); The outer taper surface of the inner liner assembly (4) is provided with dovetail grooves which cooperate with the dovetail blocks (3.4) and are used to quickly insert and lock the inner liner assembly (4) into the dovetail blocks (3.4) of the slip body after the latch (3.1) is unlocked.

2. A quickly changeable liner of the slip according to claim 1, characterized in that: The inner liner assembly (4) comprises an inner liner (4.3), a stop block (4.2), a trigger (4.1) and a toothed plate (4.4), the trigger (4.1) is fixed on the inner liner (4.3) through the stop block (4.2), and the surface of the inner liner is provided with the toothed plate (4.4).

3. A quickly changeable liner hirth according to claim 2, characterized in that: When the inner liner assembly (4) is inserted into the slip body, the inner liner (4.3) is locked by the latch (3.1); when the trigger (4.1) of the inner liner assembly is lifted, the inner liner assembly (4) can be taken out after the latch (3.1) is pushed open by the trigger (4.1).

4. A quickly changeable liner hirth according to claim 3, characterized in that: The slip body assembly (3) comprises a left slip body (3.9), a middle slip body (3.5) and a right slip body (3.6), and the left slip body (3.9) and the right slip body (3.6) are connected to the middle slip body (3.5) through a hinge pin (3.7).

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