Salvage die tap

Abstract

The invention relates to the technical field of downhole tools, in particular to a fishing male tap which comprises a connector, a connecting block, a limiting mechanism and a driving mechanism, the connecting block is arranged at the lower end of the connector, the limiting mechanism and the driving mechanism are arranged at the lower end of the connecting block, and the limiting mechanism comprises a first taper block. Sliding grooves are formed in the lower surface of the connecting block in a cross-shaped and equidistant penetrating mode, sliding blocks are slidably connected to the inner walls of the sliding grooves, one ends of the sliding blocks extend out of the sliding grooves and are fixedly connected with first conical blocks, second conical blocks are fixedly connected to the lower surfaces of the first conical blocks, and third conical blocks are fixedly connected to one ends of the second conical blocks. The outer diameters of the conical blocks can be adjusted according to the aperture of a fish, the conical blocks are prevented from entering the fish, the use flexibility of the equipment is improved, metal chips enter gaps among the first conical block, the second conical block and the third conical block and are discharged through the drainage holes, and the situation that the metal chips block the outer walls of the conical blocks of the equipment, and consequently the equipment is blocked and use is affected is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of downhole tools, in particular to a fishing cone. Background Art

[0002] The salvage cone is a commonly used salvage tool in oil and gas drilling and well repair operations. It is mainly used to retrieve broken, fallen or stuck drill tools, casing, oil pipes and other metal fish from the wellbore. Its working principle is to create a buckle on the inner or outer wall of the fish through a tapered thread to form a firm connection, thereby lifting the fish out of the wellbore. It is generally used to salvage broken drill pipes, drill collars and casing.

[0003] The aperture of the salvage male cone is fixed when in use. When the aperture is too small or too large, it cannot effectively fix the inner wall of the fallen fish, reducing the flexibility of use. At the same time, when the salvage male cone is in use, metal debris cannot be effectively discharged and will jam the tool, affecting its use. Therefore, it is necessary to propose a salvage male cone. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a salvage male cone.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a salvage male cone, comprising a joint and a connecting block, the lower end of the joint is provided with a connecting block, the lower end of the connecting block is provided with a limiting mechanism and a driving mechanism; The limiting mechanism includes a first cone block, a lower surface of the connecting block is cross-shaped and has sliding grooves equidistantly penetrated therethrough, an inner wall of the sliding groove is slidably connected with a slider, one end of the slider extends out of the sliding groove and is fixedly connected to the first cone block, a second cone block is fixedly connected to the lower surface of the first cone block, one end of the second cone block is fixedly connected to the third cone block, the first cone block is connected to the second cone block and the third cone block in a stepped manner, and the first cone block is fixedly connected to the inner walls of the second cone block and the third cone block with a fixed block.

[0006] Specifically, the driving mechanism includes a screw, a screw hole is opened through the middle position of the connecting block and is threadedly connected to the screw, one end of the screw extends to one side of the fixed block, an inclined groove is opened through the inner wall of the fixed block, the inner wall of the inclined groove is slidably connected to a circular ring block, and the circular ring block is rotatably connected to the screw.

[0007] Specifically, outer walls of the first cone block, the second cone block and the third cone block are equidistantly penetrated with salvage threads, and the salvage threads are arranged at an angle of 55 degrees relative to the first cone block, the second cone block and the third cone block.

[0008] Specifically, a drainage hole is formed through the outer wall of the connection block, and the drainage hole is arranged in an arc shape.

[0009] Specifically, a sealing ring is fixedly connected to the outer wall of the joint.

[0010] Specifically, one end of the screw rod extends out of the joint and is fixedly connected with a handle.

[0011] Specifically, chip removal grooves are formed through the outer walls of the first cone block, the second cone block and the third cone block.

[0012] Beneficial effects of the present invention: The salvage male cone described in the present invention can use a handle to drive the screw to rotate when the inner diameter of the fallen fish is small, and the screw pushes the annular block to move in the inclined groove opened in the fixed block, and the annular block gradually approaches the connecting block and pushes the fixed block and the first cone block, the second cone block and the third cone block to move inward, thereby reducing the aperture size of the first cone block, the second cone block and the third cone block; if the inner diameter of the fallen fish is large, the handle can be used to drive the screw to rotate in the opposite direction, and the annular block gradually approaches the connecting block and pushes the fixed block and the first cone block, the second cone block and the third cone block to move outward, thereby increasing the aperture size of the first cone block, the second cone block and the third cone block; the outer diameter size of the cone block can be adjusted according to the aperture size of the fallen fish to prevent the cone block from being unable to enter the fallen fish, thereby increasing the flexibility of equipment use.

[0013] The salvage male cone described in the present invention can rotate the device when the first cone block, the second cone block and the third cone block are inserted into the fallen fish. The first cone block, the second cone block and the third cone block are embedded into the fallen fish using salvage threads. Metal debris enters the gap between the first cone block and the second cone block and the third cone block and is discharged through the drainage hole, preventing metal debris from clogging the outer wall of the cone block of the device, causing the device to get stuck and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of the front view structure of a salvage male cone provided by the present invention; Figure 2 A schematic cross-sectional structure diagram of a salvage male cone provided by the present invention; Figure 3 A schematic diagram of the front view structure of a fixing block of a salvage male cone provided by the present invention; Figure 4 A schematic diagram of the front view structure of a joint of a salvage male cone provided by the present invention; Figure 5 A schematic diagram of the front view structure of a connection block of a salvage male cone provided by the present invention; Figure 6 The present invention is a schematic diagram of the front view structure of a circular ring block of a salvage male cone provided by the present invention.

[0016] In the figure: 1. joint; 2. connecting block; 3. limiting mechanism; 31. first cone block; 32. sliding block; 33. second cone block; 34. third cone block; 35. fixed block; 4. driving mechanism; 41. screw; 42. inclined groove; 43. circular ring block; 5. salvage thread; 6. drainage hole; 7. sealing ring; 8. handle; 9. chip groove. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1-Figure 6 As shown, the present invention provides the following technical solutions: Embodiment 1: The technical solution of this embodiment is different from that of Embodiment 1 and includes: the limiting mechanism 3 includes a first cone block 31, the lower surface of the connecting block 2 is cross-shaped and equidistantly penetrated with a slide groove, the inner wall of the slide groove is slidably connected with a slider 32, one end of the slider 32 extends out of the slide groove and is fixedly connected with the first cone block 31, the lower surface of the first cone block 31 is fixedly connected with a second cone block 33, one end of the second cone block 33 is fixedly connected with a third cone block 34, the first cone block 31 is connected with the second cone block 33 and the third cone block 34 in a stepped manner, and the inner walls of the first cone block 31 and the second cone block 33 and the third cone block 34 are all fixedly connected with a fixed block 35; The driving mechanism 4 includes a screw rod 41. A screw hole is formed in the middle of the connecting block 2 and is threadedly connected to the screw rod 41. One end of the screw rod 41 extends to one side of the fixed block 35. An inclined groove 42 is formed in the inner wall of the fixed block 35. The inner wall of the inclined groove 42 is slidably connected to a circular ring block 43. The circular ring block 43 is rotationally connected to the screw rod 41.

[0019] When in use, put the device into the well until the first cone block 31, the second cone block 33 and the third cone block 34 gradually touch the inner wall of the fish, use the handle to drive the first cone block 31, the second cone block 33 and the third cone block 34 to rotate, the first cone block 31, the second cone block 33 and the third cone block 34 are gradually embedded in the fish through the salvage thread 5 for connection, after fixing, move the device upward, the device moves the fish out of the well, when the inner diameter of the fish is small, the handle 8 can be used to drive the screw 41 to rotate, the screw 41 drives the annular block 43 toward the connecting block 2 direction, the annular block 43 moves in the inclined groove 42, the annular block 43 pushes the fixed block 35 and the first cone block 31, the second cone block 33 and the third cone block 34 to move inward, reducing the outer diameter of the third cone block 34. If the inner diameter of the fish is larger, the handle 8 can be used to drive the screw 41 and the annular block 43 to move away from the connecting block 2, the annular block 43 pushes the fixed block 35 to move outward, increasing the outer diameter of the first cone block 31, and the metal debris can enter the gap between the first cone block 31, the second cone block 33 and the third cone block 34 for discharge.

[0020] Embodiment 2: The technical solution of this embodiment, which is different from that of Embodiment 1, includes: A drainage hole 6 is formed through the outer wall of the connection block 2 . The drainage hole 6 is arranged in an arc shape, so that the water in the well can be drained out through the drainage hole 6 .

[0021] Among them, the outer wall of the joint 1 is fixedly connected with a sealing ring 7, which has a certain elasticity. After being installed on the salvage male cone, it can fill the tiny irregular gap between the male cone and the surface of the inner hole of the fallen object, making the position of the male cone in the inner hole of the fallen object more stable, reducing the difficulty of making a buckle or the poor quality of making a buckle due to shaking, and helping to improve the success rate of buckle making and the firmness of the connection.

[0022] One end of the screw rod 41 extends out of the joint 1 and is fixedly connected to a handle 8 , so that the handle 8 can be used to drive the screw rod 41 to rotate.

[0023] The outer walls of the first cone block 31 , the second cone block 33 and the third cone block 34 are all penetrated with a chip removal groove 9 to facilitate the removal of metal debris from the chip removal groove 9 .

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A salvage male cone, comprising a joint (1) and a connecting block (2), wherein the lower end of the joint (1) is provided with a connecting block (2), and the lower end of the connecting block (2) is provided with a limiting mechanism (3) and a driving mechanism (4); It is characterized in that The limiting mechanism (3) comprises a first cone block (31), the lower surface of the connecting block (2) is provided with a slide groove equidistantly extending therethrough in a cross shape, the inner wall of the slide groove is slidably connected with a slider (32), one end of the slider (32) extends out of the slide groove and is fixedly connected with the first cone block (31), the lower surface of the first cone block (31) is fixedly connected with a second cone block (33), one end of the second cone block (33) is fixedly connected with a third cone block (34), the first cone block (31) is connected with the second cone block (33) and the third cone block (34) in a stepped manner, and the inner walls of the first cone block (31) and the second cone block (33) and the third cone block (34) are all fixedly connected with a fixing block (35).

2. A salvage taper according to claim 1, characterized in that: The driving mechanism (4) comprises a screw rod (41), a screw hole is formed through the middle position of the connecting block (2) and is threadedly connected to the screw rod (41), one end of the screw rod (41) extends to one side of the fixing block (35), an inclined groove (42) is formed through the inner wall of the fixing block (35), the inner wall of the inclined groove (42) is slidably connected to a circular ring block (43), and the circular ring block (43) is rotationally connected to the screw rod (41).

3. A salvage taper according to claim 1, characterized in that: The outer walls of the first cone block (31), the second cone block (33) and the third cone block (34) are all equidistantly penetrated with fishing threads (5), and the fishing threads (5) are arranged at an angle of 55 degrees relative to the first cone block (31), the second cone block (33) and the third cone block (34).

4. A salvage taper according to claim 1, characterized in that: A drainage hole (6) is provided through the outer wall of the connection block (2), and the drainage hole (6) is arranged in an arc shape.

5. A salvage taper according to claim 1, characterized in that: A sealing ring (7) is fixedly connected to the outer wall of the joint (1).

6. A salvage taper according to claim 1, characterized in that: One end of the screw rod (41) extends outside the joint (1) and is fixedly connected to a handle (8).

7. A salvage taper according to claim 1, characterized in that: The outer walls of the first cone block (31), the second cone block (33) and the third cone block (34) are all provided with chip removal grooves (9) extending through them.

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