Geological drilling casing fishing device

Abstract

The utility model provides a geological drilling casing salvage device, which relates to the technical field of geological drilling casing salvage, and comprises a mounting seat detachably connected with a salvage pipe, a mounting channel is arranged in the mounting seat, a plurality of mounting grooves are arranged on the outer side wall of the mounting seat in a surrounding manner, the mounting grooves are communicated with the mounting channel, and first clamping plates are arranged in the mounting grooves. A driving assembly for driving the first clamping plates to move is arranged in the mounting channel, a plurality of protection plates are arranged on the outer side wall of the mounting base in a surrounding mode, and second clamping plates are arranged on the side walls, opposite to the mounting base, of the protection plates; a first clamping plate and a second clamping plate which are arranged on the mounting seat can be used for realizing double fixation on the pipe fitting to be fished, so that the fixing effect of the structure on the pipe fitting during fishing is improved; and the first clamping plate and the second clamping plate are arranged in a grabbing space for accommodating the pipe fitting, which can be defined by the protective plate on the periphery of the mounting seat and the mounting seat, so that the structure can be adaptive to the to-be-fished pipe fittings with different pipe diameters, and the fishing effect of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geological drilling casing fishing, and specifically relates to a geological drilling casing fishing device. Background Technique

[0002] In the geological core drilling project, situations such as collapse and diameter reduction often occur, leading to frequent drilling failures, such as drill pipe unthreading, drill pipe breakage accidents, and technical casings in the hole being unable to be lifted. These technical problems bring great difficulties to the drilling construction, not only with low drilling efficiency, but also it is difficult to achieve the geological objectives in terms of drilling quality, seriously affecting geological exploration work.

[0003] Currently, in the existing technology, the main treatment methods for fishing are mainly three main ways: drilling and grinding, milling, and alternately using fishing tools for dropped objects and milling and fishing. According to different complex situations in the well, drilling and grinding tools include various shaped drill bits, mill shoes, milling cones, milling wedges, casing mills, etc. Fishing tools for dropped objects include five major categories of special tools such as pipe types, rod types, rope types, thick substance sediment types, and small tool objects. There are dozens of corresponding tools. Currently, there are a wide variety of special fishing tools, each with a single function, strong pertinence, large limitations, and the fishing efficiency is restricted by the experience of professionals themselves.

[0004] Fishing tools for dropped objects require the fish top shape of the downhole dropped object to be regular, with accurate inner and outer diameter dimensions. The corresponding inner and outer fishing tools must have sufficient and effective fishing methods at the fish top position to capture the dropped object. The captured dropped object cannot be stuck in the well, otherwise the fishing cannot succeed, affecting the fishing effect of the dropped object. Content of the Utility Model

[0005] The purpose of the utility model is to provide a geological drilling casing fishing device, aiming at the deficiencies of the existing technology, which can solve the problems raised in the above background technique.

[0006] The technical solution of the utility model is realized as follows:

[0007] The utility model provides a geological drilling casing fishing device, which includes a mounting seat detachably connected to a fishing pipe. An installation channel is provided inside the mounting seat. A plurality of installation grooves are circumferentially arranged on the outer side wall of the mounting seat. The installation grooves communicate with the installation channel. First clamping plates are rotatably arranged in the installation grooves. A driving assembly for driving the first clamping plates to move is arranged in the installation channel. A plurality of guard plates are circumferentially arranged on the outer side wall of the mounting seat. Second clamping plates are arranged on the side wall of the guard plate opposite to the mounting seat.

[0008] In some technical solutions of the present utility model, the driving assembly includes a top block seat slidably disposed in the installation channel and a limiting block in the shape of a frustum of a cone. The large-diameter end of the limiting block is connected to the top block seat. Push rods are provided in the installation grooves. An adjusting spring connected to the inner wall of the installation groove is sleeved on the push rod. The push rod is connected to the first clamping plate, and an inclined surface adapted to the conical surface of the limiting block is provided at the free end of the push rod.

[0009] In some technical solutions of the present utility model, a connecting cylinder detachably connected to the fishing pipe is provided on the end surface of the mounting seat.

[0010] In some technical solutions of the present utility model, a piston is slidably disposed in the connecting cylinder, and the piston is connected to the top block seat.

[0011] In some technical solutions of the present utility model, an annular locking groove is provided on the outer side wall of the top block seat, and electromagnetic locks are provided in the installation grooves. A part of the telescopic end of the electromagnetic lock is placed in the installation channel.

[0012] In some technical solutions of the present utility model, the guard plate is rotatably disposed on the outer side wall of the mounting seat. A torsion spring is provided between the guard plate and the mounting seat, and the included angle between the guard plate and the mounting seat is an acute angle.

[0013] In some technical solutions of the present utility model, guide plates are provided at the free ends of the guard plates.

[0014] Compared with the prior art, the present utility model has at least the following advantages or beneficial effects:

[0015] The first clamping plate and the second clamping plate provided on the mounting seat can achieve double fixation of the pipe fittings to be fished, improving the fixation effect of the structure during pipe fitting fishing; and the guard plate provided around the mounting seat with the first clamping plate and the second clamping plate can enclose a grasping space for accommodating the pipe fittings with the mounting seat, enabling the structure to adapt to pipe fittings to be fished with different pipe diameters and improving the fishing effect of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a three-dimensional structural diagram of the present utility model;

[0018] Figure 2 It is a bottom view structural diagram of the present utility model;

[0019] Figure 3 A sectional combination schematic diagram of the present utility model.

[0020] Reference numerals: 1, connecting cylinder; 2, piston; 3, mounting seat; 4, second clamping plate; 5, guard plate; 6, pipe fitting; 7, first clamping plate; 8, torsion spring; 9, top block seat; 10, limiting block; 11, adjusting spring; 12, push rod; 13, electromagnetic lock; 14, guiding plate. Specific embodiments

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0023] Embodiment

[0024] Please refer to Figures 1-3 as shown in

[0025] The present utility model provides a geological drilling casing fishing device, as shown in Figure 1 , Figure 2As shown in the figure, it includes a mounting seat 3 detachably connected to the salvage pipe. A connecting cylinder 1 detachably connected to the salvage pipe is fixed on the end face of the mounting seat 3 by welding. The connecting cylinder 1 passes through the salvage pipe and is detachably connected to it by threaded connection; the mounting seat 3 is a stepped tubular structure. An installation channel is provided inside the mounting seat 3. The cross-section of the installation channel is circular. A plurality of rectangular installation grooves are provided around the outer wall of the mounting seat 3. The installation grooves communicate with the installation channel. First clamping plates 7 are slidably provided in the installation grooves. The number of the first clamping plates 7 is 3. A driving component for driving the first clamping plates 7 to move is provided in the installation channel. A plurality of guard plates 5 are provided around the outer wall of the mounting seat 3. The number of the guard plates 5 is 3. Second clamping plates 4 are provided on the side walls of the guard plates 5 opposite to the mounting seat 3. When salvaging the pipe fitting 6 to be salvaged, a part of the mounting seat 3 can be embedded into the pipe fitting 6 through the above structure. Then, the first clamping plates 7 installed on the mounting seat 3 are driven by the driving component to abut against the inner wall of the pipe fitting 6. And the guard plates 5 provided around the mounting seat 3 can enclose a grasping space for accommodating the pipe fitting 6 with the mounting seat 3. At this time, the second clamping plates 4 provided on the side walls of the guard plates 5 opposite to the mounting seat 3 will apply a top thrust to the outer wall of the pipe fitting 6, and cooperate with the first clamping plates 7 to fix the pipe fitting 6, so as to realize the salvage of the pipe fitting 6 and avoid the problem that the pipe fitting 6 detaches from the salvage device.

[0026] Preferably, the side wall of the first clamping plate 7 in contact with the pipe fitting 6 is an arc surface, and concave and convex scratches are engraved on this arc surface to increase the friction when the first clamping plate 7 contacts the inner wall of the pipe fitting 6.

[0027] Preferably, the guard plate 5 is an arc-shaped plate, and its arc length is one-sixth of the arc length of a circle.

[0028] Preferably, the second clamping plate 4 is also an arc-shaped plate. Tooth grooves are also provided on the inner arc surface of the second clamping plate 4 to increase the friction when the second clamping plate 4 contacts the outer wall of the pipe fitting 6. And the second clamping plate 4 is rotatably arranged on the inner arc surface of the guard plate 5 through a fixing seat, and two second clamping plates 4 are provided on the inner arc surface of the same guard plate 5.

[0029] And during the actual working process, the tooth grooves on the second clamping plate 4 are embedded into the external threads provided on the outer wall of the pipe fitting 6 to increase the biting ability of the two.

[0030] In some technical solutions of the present utility model, the driving assembly includes a top block seat 9 slidably disposed in the installation channel and a limiting block 10 in the shape of a frustum of a cone. The large diameter end of the limiting block 10 is connected to the top block seat 9 by welding or bolts. Push rods 12 are installed in the installation grooves through sliding sleeves. The cross-section of the push rod 12 is rectangular to prevent the push rod 12 from rotating in the installation groove. An adjusting spring 11 connected to the inner wall of the installation groove is sleeved on the push rod 12. After the push rod 12 is not squeezed by the limiting block 10, the push rod 12 can return to its original position under the action of the adjusting spring 11, that is, the first clamping plate 7 protruding from the installation groove is pulled back to the initial position to achieve unlocking. The push rod 12 is connected to the first clamping plate 7, and an inclined surface adapted to the conical surface of the limiting block 10 is provided at the free end of the push rod 12. This structure enables the push rod 12 to always be in contact with the limiting block 10 when the push rod 12 is squeezed by the limiting block 10, avoiding the first clamping plate 7 being out of contact with the inner wall of the pipe fitting 6 at a certain moment due to the lack of the acting force exerted by the limiting block 10 on it, which affects the fixed locking effect of this structure on the pipe fitting 6.

[0031] In some technical solutions of the present utility model, a piston 2 is slidably disposed in the connecting cylinder 1. The piston 2 is connected to the top block seat 9 by a connecting rod, and a limiting spring connected to the inner wall of the installation channel is sleeved on the connecting rod.

[0032] In some technical solutions of the present utility model, an annular locking groove 15 is provided on the outer side wall of the top block seat 9, and electromagnetic locks 13 are provided in the installation grooves. A part of the telescopic end of the electromagnetic lock 13 is placed in the installation channel. When the limiting block 10 moves to the extreme position, the electromagnetic lock 13 is opposite to the locking groove 15. At this time, the telescopic end of the electromagnetic lock 13 will be embedded in the locking groove 15 to limit the movement of the limiting block 10, so that the limiting block 10 continuously exerts a thrust on the push rod 12, keeping the first clamping plate 7 in contact with the inner wall of the pipe fitting 6 all the time, which is convenient for the fishing operation.

[0033] In some technical solutions of the present utility model, a guard plate 5 is rotatably disposed on the outer side wall of the mounting seat 3. A torsion spring 8 is provided between the guard plate 5 and the mounting seat 3, and the included angle between the guard plate 5 and the mounting seat 3 is an acute angle. In this way, under the action of the torsion spring 8, the guard plate 5 can exert a thrust on the second clamping plate 4, forcing the tooth grooves on the second clamping plate 4 to be embedded in the external threads provided on the outer wall of the pipe fitting 6, increasing their biting ability.

[0034] In some technical solutions of the present utility model, guide plates 14 are provided at the free ends of the guard plates 5. When this structure is adapted to the pipe fitting 6, it is convenient for the pipe fitting 6 to smoothly enter the grasping space formed by the guard plate 5 and the mounting seat 3 and cooperate with the first clamping plate 7 and the second clamping plate 4.

[0035] Preferably, the included angle between the guard plate 5 and the guide plate 14 is an obtuse angle, and the guard plate 5 and the guide plate 14 are integrally formed by welding.

[0036] The salvage process of this structure is as follows: First, install the connecting cylinder 1 on the salvage pipe, and then lower the salvage pipe to the component to be salvaged. At this time, the pipe fitting 6 enters the grasping space formed by the guard plate 5 and the mounting seat 3. Inject high-pressure liquid into the salvage pipe. The high-pressure liquid acts on the piston 2, and the piston 2 pushes the top block seat 9 and the limit block 10 to move vertically downward through the connecting rod. At this time, under the action of the push rod 12, the first clamping plate 7 gradually moves out of the installation groove until it abuts against the inner wall of the pipe fitting 6, so that the first clamping plate 7 abuts against the inner wall of the pipe fitting 6, thereby fixing the pipe fitting 6 on the salvage pipe to facilitate the salvage work.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A geological drilling casing fishing device, characterized in that, It includes a mounting seat (3) detachably connected to a fishing pipe. An installation channel is provided in the mounting seat (3). A plurality of mounting grooves are circumferentially provided on the outer side wall of the mounting seat (3). The mounting grooves communicate with the installation channel. A first clamping plate (7) is rotatably provided in each of the mounting grooves. A driving component for driving the movement of the first clamping plate (7) is provided in the installation channel. A plurality of guard plates (5) are circumferentially provided on the outer side wall of the mounting seat (3). A second clamping plate (4) is provided on the side wall of the guard plate (5) opposite to the mounting seat (3).

2. The geological drilling casing fishing device according to claim 1, characterized in that, The driving component includes a top block seat (9) slidably provided in the installation channel and a limiting block (10) in a frustum shape. The large-diameter end of the limiting block (10) is connected to the top block seat (9). A push rod (12) is provided in each of the mounting grooves. An adjusting spring (11) connected to the inner wall of the mounting groove is sleeved on the push rod (12). The push rod (12) is connected to the first clamping plate (7). An inclined surface adapted to the conical surface of the limiting block (10) is provided at the free end of the push rod (12).

3. The geological drilling casing fishing device according to claim 2, characterized in that, A connecting cylinder (1) detachably connected to the fishing pipe is provided on the end surface of the mounting seat (3).

4. The geological drilling casing fishing device according to claim 3, characterized in that, A piston (2) is slidably provided in the connecting cylinder (1). The piston (2) is connected to the top block seat (9).

5. The geological drilling casing fishing device according to claim 2, characterized in that, An annular locking groove (15) is provided on the outer side wall of the top block seat (9). An electromagnetic lock (13) is provided in each of the mounting grooves. A partial telescopic end of the electromagnetic lock (13) is placed in the installation channel.

6. The geological drilling casing fishing device according to claim 1, characterized in that, The guard plate (5) is rotatably provided on the outer side wall of the mounting seat (3). A torsion spring (8) is provided between the guard plate (5) and the mounting seat (3). The included angle between the guard plate (5) and the mounting seat (3) is an acute angle.

7. The geological drilling casing fishing device according to claim 6, characterized in that, Guide plates (14) are provided at the free ends of the guard plates (5).

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