Mouse hole slip capable of adjusting height of drill string

Abstract

The invention discloses a mouse hole slip capable of adjusting the height of a drill string, and relates to the technical field of petroleum drilling mechanical equipment. One end of the guide pipe is connected with the hydraulic clamping mechanism; the hydraulic lifting mechanism is connected with the other end of the guide pipe; the hydraulic clamping mechanism comprises a clamping shell, an assembling cavity is formed in the clamping shell, and corresponding pipe holes are formed in the top side and the bottom side of the clamping shell; the two clamping hydraulic cylinders are installed in the clamping shell in a spaced mode, the clamping hydraulic cylinders are located on the two sides of the pipe hole, and the output ends of the clamping hydraulic cylinders face the pipe hole; the two clamping tong heads are mounted at the output ends of the clamping hydraulic cylinders in a one-to-one correspondence manner; the clamping tooth plates are installed on the side faces of the clamping tong heads respectively. The technical problems that an existing mouse hole slip is complex in structure, difficult to operate and unreliable in clamping are solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling mechanical equipment, in particular to a mouse hole slip with adjustable drill column height. Background Art

[0002] In the process of oil drilling, a mouse hole is used to temporarily store a single drill pipe or connect drilling tools. The depth from the drilling table to the square well meets the length requirement, so it is generally not necessary to dig a hole, or a pit with a depth of several dozen centimeters and a diameter of about 10" will do. A 9-5 / 8" or 13-3 / 8" casing will be laid in the mouse hole as a mouse hole pipe. Holes are cut at different positions on the lower part of the pipe to insert pins, which are used to adjust the length of the drill pipe or other pipe string exposed on the drilling table after it is placed in the mouse hole pipe.

[0003] At present, manual handling is adopted in the connection of single-rod parts in small mouse holes of drilling. The lifting card and back-up clamp are manually moved. The drill pipe joint is seated on the lifting card, and the back-up clamp bears the reverse torque of the make-up. Some parts also use corresponding slips to clamp and adjust the extension height of the drill pipe, but this kind of slips has a complex structure and is not easy to operate. The clamping is unreliable and easy to slip. Summary of the invention

[0004] The purpose of the present invention is to provide a mouse hole slip with adjustable drill string height, which solves the technical problems of the mouse hole slip in the prior art that the structure is complex and the operation is difficult.

[0005] The present application embodiment discloses a mouse hole slip with adjustable drill string height, comprising: Hydraulic clamping mechanism; A guide tube, one end of which is connected to the hydraulic clamping mechanism; A hydraulic lifting mechanism connected to the other end of the guide tube; The hydraulic clamping mechanism comprises: A holding shell, wherein an assembly cavity is provided inside the holding shell, and corresponding tube holes are opened on the top and bottom sides of the holding shell; Two clamping hydraulic cylinders are installed inside the clamping housing at intervals, and the clamping hydraulic cylinders are located on both sides of the pipe hole, and the output ends of the clamping hydraulic cylinders face the pipe hole; Two clamping pliers are mounted on the output ends of the clamping hydraulic cylinder in a one-to-one correspondence; The clamping teeth are respectively installed on the side surfaces of the clamping pliers heads.

[0006] The present application designs a hydraulic clamping mechanism, and utilizes the push of a clamping hydraulic cylinder to achieve subsequent clamping of the drill rod.

[0007] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, a guide sleeve is installed on the pipe hole. The beneficial effect of adopting this step is that the drill rod can be inserted and removed through the guide sleeve.

[0008] Furthermore, the hydraulic clamping mechanism further comprises a synchronous connection unit, the synchronous connection unit is installed inside the clamping housing, and both ends of the synchronous connection unit are respectively connected to the clamping pliers; The synchronous connection unit comprises: A connecting shaft is installed inside the holding housing; A cross bar, movably mounted on the connecting shaft; Two connecting rods are respectively installed at the two ends of the cross bar, and the ends of the connecting rods are connected to the clamping pliers. The beneficial effect of adopting this step is that the synchronous movement of the two clamping pliers can be achieved through the synchronous connection unit.

[0009] Furthermore, a mounting positioning block is provided on the side of the holding shell. The beneficial effect of adopting this step is that the stable assembly of the entire holding shell is ensured by the mounting positioning block.

[0010] Furthermore, the hydraulic lifting mechanism comprises: A lifting shell, wherein a receiving cavity is provided inside the lifting shell; An upper connecting plate connected to the bottom of the guide tube; A lifting cylinder, one end of which is connected to the upper connecting plate; A rathole pipe is installed at the bottom of the upper connecting plate; A lower connecting plate is sleeved on the rathole pipe; The pulley block is respectively connected with the upper connecting plate and the lower connecting plate; The pipe support assembly is arranged inside the rathole pipe, and the pipe support assembly is connected to the wire rope of the pulley block. The beneficial effect of adopting this step is that the drill rod can be stably driven to move up and down through the hydraulic lifting mechanism.

[0011] Furthermore, there are at least two pulley groups. The beneficial effect of adopting this step is to ensure the stability of movement through multiple groups.

[0012] Furthermore, the pulley block comprises: A fixed pulley, mounted on the bottom of the upper connecting plate; A movable pulley, mounted on the top of the lower connecting plate; One end of the wire rope is connected to the inner wall of the lifting shell, and the other end is connected to the pipe support assembly after passing through the movable pulley and the fixed pulley in sequence. The beneficial effect of adopting this step is that the stroke of the up and down movement of the pipe support assembly can be increased through the corresponding gear train.

[0013] Furthermore, a through groove for the steel wire rope to pass through is provided on the side of the rathole pipe.

[0014] Furthermore, the pipe support assembly comprises: A lifting pipe, located inside the rathole pipe, and the lifting pipe is connected to the steel wire rope; A pipe column tray installed inside the lifting pipe; A spring is arranged inside the lifting tube, and the spring cooperates with the bottom of the column tray. The beneficial effect of adopting this step is that the spring can play a buffering role.

[0015] Furthermore, a mousehole tube lower short circuit is installed at the bottom of the mousehole tube.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The present application is provided with a hydraulic clamping mechanism, which can complete the clamping of the top of the drill rod and ensure the stability of the drill rod after placement.

[0017] 2. The present application is provided with a hydraulic lifting mechanism, which utilizes a pipe support assembly to carry the drill rod, and cooperates with a hydraulic clamping mechanism to ensure the stability of the drill rod clamping.

[0018] 3. The present application can realize long-stroke movement of the drill rod by cooperating with the pulley block and the lifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a mouse hole slip with adjustable drill string height according to a specific embodiment of the present invention; Figure 2 for Figure 1 A structural diagram of the hydraulic lifting mechanism in FIG. Figure 3 for Figure 1 Schematic diagram of the internal structure of the hydraulic lifting mechanism; Figure 4 for Figure 3 A schematic diagram of the structure of the middle tube support assembly; Figure 5 for Figure 1 The structural diagram of the hydraulic clamping mechanism part; Figure 6 for Figure 5 Schematic diagram of the internal structure; The specific reference numerals are as follows: 1-Hydraulic clamping mechanism; 2-Guide pipe; 3-Hydraulic lifting mechanism; 4-Synchronous connection unit; 101-holding housing; 102-assembly cavity; 103-tube hole; 104-holding hydraulic cylinder; 105-holding clamp head; 106-guide sleeve; 107-installation positioning block; 108-holding tooth plate; 301-lifting shell; 302-locking bolt; 303-upper connecting plate; 304-lifting cylinder; 305-mouse hole pipe; 306-lower connecting plate; 307-pulley block; 308-pipe support assembly; 309-fixed pulley; 310-movable pulley; 311-wire rope; 312-through groove; 313-lifting pipe; 314-pipe column tray; 315-spring; 316-mouse hole pipe lower short circuit; 401-connecting shaft; 402-cross bar; 403-connecting rod. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1: like Figure 1-6 As shown, an embodiment of the present application discloses a mouse hole slip with adjustable drill string height, which is used to adjust the drill string height. At the same time, the present application also provides components such as a tray inside the slip slot for supporting the drill string.

[0025] like Figure 1-3As shown, the specific structure of this application includes A hydraulic clamping mechanism 1 is used to clamp the drill pipe after it has entered and adjusted to a corresponding position to prevent it from shaking; A guide tube 2, one end of which is connected to the hydraulic clamping mechanism 1. The guide tube 2 is used to facilitate the entry of the drill rod and provide protection to reduce external influences. The guide tube 2 can be a telescopic tube or a fixed-length pipe; A hydraulic lifting mechanism 3 is connected to the other end of the guide tube 2, and is used to lift the drill rod so that it moves up and down inside the guide tube 2; The hydraulic clamping mechanism 1 comprises: A clamping shell 101, wherein an assembly cavity 102 is provided inside the clamping shell 101, and corresponding tube holes 103 are provided on the top and bottom sides of the clamping shell 101, and the tube holes 103 are convenient for subsequent drill rods to enter therefrom, and the tube holes 103 at the bottom correspond to the guide tube 2, and the drill rod will enter the guide tube 2. Preferably, the clamping shell 101 is a rectangular shell; Two clamping hydraulic cylinders 104 are installed inside the clamping housing 101 at intervals, and the clamping hydraulic cylinders 104 are located on both sides of the pipe hole 103, and the output ends of the clamping hydraulic cylinders 104 face the pipe hole 103; Two clamping pliers 105 are mounted on the output ends of the clamping hydraulic cylinder 104 in a one-to-one correspondence; The clamping teeth 108 are respectively installed on the sides of the clamping clamp head 105. The present application completes the clamping of the drill pipe through the clamping hydraulic cylinder 104. When the drill pipe passes through the pipe hole 103 and reaches the corresponding position, the clamping hydraulic cylinder 104 moves to complete the clamping.

[0026] In order to ensure that the drill rod can enter more stably, the present application installs a guide sleeve 106 on the pipe hole 103, so as to reduce shaking and damage after the drill rod enters.

[0027] In order to ensure stability during clamping, the hydraulic clamping mechanism 1 further includes a synchronous connection unit 4, which is installed inside the clamping housing 101, and both ends of the synchronous connection unit 4 are respectively connected to the clamping pliers 105; like Figure 6 As shown, the synchronous connection unit 4 includes: The connecting shaft 401 is installed inside the holding housing 101; A cross bar 402, movably mounted on the connecting shaft 401; Two connecting rods 403 are respectively installed at the two ends of the cross bar 402, and the ends of the connecting rods 403 are connected to the clamping pliers 105; the present application utilizes the movement of the cross bar along the connecting axis 401 to achieve synchronization of the connecting rods 403, and the connection method of the connecting rods 403 is hinged.

[0028] In one embodiment, a mounting positioning block 107 is disposed on the side of the holding housing 101 , and a card slot is disposed at the bottom of the mounting positioning block 107 to facilitate subsequent positioning and installation.

[0029] Among them, Figure 2-3 As shown, in order to realize the lifting of the drill rod, the present application designs a hydraulic lifting mechanism 3, and the hydraulic lifting mechanism 3 includes: A lifting shell 301, wherein a receiving cavity is provided inside the lifting shell 301, and locking bolts 302 are installed on the periphery of the lifting shell 301; The upper connecting plate 303 is connected to the bottom of the guide tube 2, and the lifting housing 301 is connected to the upper connecting plate 303; A lifting cylinder 304, one end of which is connected to the upper connecting plate 303, and the lifting cylinder 304 is used as a power source to drive the subsequent movement of the lower connecting plate, thereby realizing the up and down movement of the corresponding internal mechanism; A rat hole pipe 305 is installed at the bottom of the upper connecting plate 303; A lower connecting plate 306 is sleeved on the mouse hole tube 305; The pulley block 307 is respectively connected with the upper connecting plate 303 and the lower connecting plate 306; The pipe support assembly 308 is arranged inside the rathole tube 305, and the pipe support assembly 308 is connected to the wire rope of the pulley block 307; the present application utilizes the movement of the lifting cylinder 304 to drive the lower connecting plate 306 to move, and then through the drive of the pulley block 307, the pipe support assembly 308 moves up and down, thereby driving the drill rod to move up and down.

[0030] Specifically, there are at least two pulley groups 307, so that the suspension movement can be more stable.

[0031] Specifically, the pulley block 307 includes: A fixed pulley 309 is installed at the bottom of the upper connecting plate 303; A movable pulley 310 is mounted on the top of the lower connecting plate 306; One end of the wire rope 311 is connected to the inner wall of the lifting shell 301, and the other end is connected to the pipe support assembly 308 after passing through the movable pulley 310 and the fixed pulley 309 in sequence; the pulley group 307 of the present application can ensure that the pipe support assembly 308 can move up and down stably, thereby driving the drill pipe up and down.

[0032] Among them, the side of the rathole tube 305 is provided with a through groove 312 for the steel wire rope 311 to pass through. Because the pipe support assembly 308 is inside the rathole tube 305 and requires the steel wire rope 311 to pull it, the through groove 312 needs to be provided so that the pipe support assembly 308 can be pulled stably.

[0033] Specifically, Figure 4 As shown, the tube support assembly 308 includes: A lifting pipe 313 is located inside the rat hole pipe 305, and the lifting pipe 313 is connected to the steel wire rope 311; A pipe column tray 314 is installed inside the lifting pipe 313; The spring 315 is arranged inside the lifting tube 313, and the spring 315 cooperates with the bottom of the pipe column tray 314; the pipe column tray 314 in the present application is used to support the drill pipe, and at the same time, the spring 315 plays a buffering role. Driven by the wire rope 311, the lifting tube 313 and the pipe column tray 314 can be pulled up and down, thereby realizing the up and down movement of the drill pipe.

[0034] Specifically, a mousehole tube lower short circuit 316 is installed at the bottom of the mousehole tube 305 .

[0035] The working process of this application is as follows: The drill pipe is inserted from the guide sleeve 106, through the pipe hole 103, and then moved down along the guide tube 2 and the mouse hole tube 305 until it reaches the pipe column tray 314, where the spring 315 can achieve a buffering effect; at this time, the lifting cylinder 304 moves, and the lifting tube 313 moves down or up through the reversal of the pulley block 307, and finally reaches the corresponding position; the clamping hydraulic cylinder 104 is started to drive the clamping clamp head 105 and the clamping tooth plate 108 to complete the clamping of the drill pipe.

[0036] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A mouse hole slip with adjustable drill string height, characterized in that: include Hydraulic clamping mechanism; A guide tube, one end of which is connected to the hydraulic clamping mechanism; A hydraulic lifting mechanism connected to the other end of the guide tube; The hydraulic clamping mechanism comprises: A holding shell, wherein an assembly cavity is provided inside the holding shell, and corresponding tube holes are opened on the top and bottom sides of the holding shell; Two clamping hydraulic cylinders are installed inside the clamping housing at intervals, and the clamping hydraulic cylinders are located on both sides of the pipe hole, and the output ends of the clamping hydraulic cylinders face the pipe hole; Two clamping pliers are mounted on the output ends of the clamping hydraulic cylinder in a one-to-one correspondence; The clamping teeth are respectively installed on the side surfaces of the clamping pliers heads.

2. The mouse hole slip according to claim 1, characterized in that: A guide sleeve is installed on the pipe hole.

3. The mouse hole slip according to claim 1, characterized in that: The hydraulic clamping mechanism further comprises a synchronous connection unit, which is installed inside the clamping housing, and both ends of the synchronous connection unit are respectively connected to the clamping pliers; The synchronous connection unit comprises: A connecting shaft is installed inside the holding housing; A cross bar, movably mounted on the connecting shaft; Two connecting rods are respectively installed at two ends of the cross bar, and the ends of the connecting rods are connected to the clamping pliers.

4. The mouse hole slip according to claim 1, characterized in that: A mounting positioning block is arranged on the side of the clamping shell.

5. The mouse hole slip according to claim 1, characterized in that: The hydraulic lifting mechanism comprises: A lifting shell, wherein a receiving cavity is provided inside the lifting shell; An upper connecting plate connected to the bottom of the guide tube; A lifting cylinder, one end of which is connected to the upper connecting plate; A rathole pipe is installed at the bottom of the upper connecting plate; A lower connecting plate is sleeved on the rathole pipe; The pulley block is respectively connected with the upper connecting plate and the lower connecting plate; The pipe support assembly is arranged inside the rathole pipe, and the pipe support assembly is connected to the steel wire rope of the pulley block.

6. The mouse hole slip according to claim 5, characterized in that: There are at least two pulley blocks.

7. The mouse hole slip according to claim 5, characterized in that: The pulley block comprises: A fixed pulley, mounted on the bottom of the upper connecting plate; A movable pulley, mounted on the top of the lower connecting plate; One end of the steel wire rope is connected to the inner wall of the lifting shell, and the other end of the steel wire rope is connected to the pipe support assembly after passing through the movable pulley and the fixed pulley in sequence.

8. The mouse hole slip according to claim 7, characterized in that: A through groove for the steel wire rope to pass through is arranged on the side of the rat hole pipe.

9. The mouse hole slip according to claim 7, characterized in that: The pipe support assembly comprises: A lifting pipe, located inside the rathole pipe, and the lifting pipe is connected to the steel wire rope; A pipe column tray installed inside the lifting pipe; A spring is arranged inside the lifting tube, and the spring is matched with the bottom of the column tray.

10. The mouse hole slip according to claim 7, characterized in that: A mouse hole pipe lower short circuit is installed at the bottom of the mouse hole pipe.

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