Fracturing wellhead anti-collision wear-resistant sleeve

Abstract

The utility model relates to the technical field of well drilling tools, in particular to a fracturing wellhead anti-collision type wear-resisting sleeve which comprises a linear connecting ring, a first upper abutting ring, a left sleeve die, a first lower abutting ring, a second upper abutting ring, a right sleeve die and a second lower abutting ring, the first upper abutting ring is fixed to the upper end of the left sleeve die, and the first lower abutting ring is fixed to the lower end of the left sleeve die. A second upper abutting ring is fixed to the upper end of the right cover die, a second lower abutting ring is fixed to the lower end of the right cover die, vertical anti-abrasion strips and transverse anti-abrasion strips are fixed to the surface of the left cover die and the surface of the right cover die and are distributed in a crossed mode to form a net-shaped structure, and springs are arranged on the surfaces of the inserting rods in a sleeving mode. The anti-abrasion device has the beneficial effects that through the vertical anti-abrasion strips and the transverse anti-abrasion strips which are arranged on the left cover die and the right cover die, the original direct hard contact between a sleeve and a drill rod is changed into indirect soft contact between the drill rod and the inner wall of the sleeve through the vertical anti-abrasion strips and the transverse anti-abrasion strips; and mutual damage caused by contact friction between the drill rod and the sleeve is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of drilling tools, in particular to an anti-collision wear-resistant sleeve for a fracturing wellhead. Background Art

[0002] With the growth of global energy demand, oil and gas extraction technology continues to develop, among which shale gas and unconventional oil and gas resources have become the focus. In the process of exploiting these resources, hydraulic fracturing technology is widely used. However, the high pressure and complex environment in the fracturing process put forward extremely high requirements on wellhead equipment, especially the wear resistance and impact resistance of wellhead casing.

[0003] In the prior art, during the drilling and completion process, due to the long construction time, the drill pipe body causes great wear to the casing in the well, which seriously affects the life of the construction well. At the same time, the long-term wear of the drill pipe will also affect the normal service life of the drilling tool. Moreover, when the drill pipe is moving, the drill pipe joint will contact the inner wall of the casing under the action of unilateral load. Such contact will cause additional casing wear, which is not conducive to protecting the drill pipe and the casing. At the same time, it will cause the casing sealing to decrease, affecting the mining efficiency and safety.

[0004] To this end, the utility model proposes an anti-collision wear-resistant sleeve for a fracturing wellhead to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a fracturing wellhead anti-collision wear-resistant sleeve to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fracturing wellhead anti-collision wear-resistant sleeve, the fracturing wellhead anti-collision wear-resistant sleeve comprises: a linear connecting ring, a first upper butt ring, a left sleeve mold, a first lower butt ring, a second upper butt ring, a right sleeve mold and a second lower butt ring, the first upper butt ring is fixed to the upper end of the left sleeve mold, the first lower butt ring is fixed to the lower end of the left sleeve mold, the second upper butt ring is fixed to the upper end of the right sleeve mold, and the second lower butt ring is fixed to the lower end of the right sleeve mold, and the surfaces of the left sleeve mold and the right sleeve mold are both fixed with vertical anti-wear strips and horizontal anti-wear strips, and the vertical anti-wear strips and the horizontal anti-wear strips are cross-distributed to form a mesh structure;

[0007] The insert rod has a spring sleeved on its surface, one end of the spring is fixedly connected to a stop ring, and the other end of the spring is fixedly connected to a linear connection ring.

[0008] Preferably, the insertion rod is fixedly connected to the linear connection ring, and a plurality of insertion rods are provided, and the plurality of insertion rods are equidistantly distributed on both sides of the linear connection ring, and the end faces of the insertion rods are chamfered, and the stop ring is slidably connected to the insertion rods.

[0009] Preferably, a second mounting hole is opened on the surface of the linear connecting ring, and a plurality of second mounting holes are provided, and the plurality of second mounting holes are evenly distributed on both sides of the linear connecting ring.

[0010] Preferably, the surfaces of the first upper retaining ring, the first lower retaining ring, the second upper retaining ring and the second lower retaining ring are all provided with connecting holes, and stud bolts are provided in the connecting holes.

[0011] Preferably, the surfaces of the first upper retaining ring and the second upper retaining ring are both provided with a first mounting hole, the first mounting hole and the second mounting hole correspond to each other, the first mounting hole and the second mounting hole are connected by a pin, the upper surfaces of the first upper retaining ring and the second upper retaining ring are both provided with a stop groove, a slot is provided at the bottom of the stop groove, the stop ring can be embedded in the stop groove, the insert rod can be inserted into the slot, and the end surface of the slot is chamfered.

[0012] Preferably, the vertical anti-wear strips and the transverse anti-wear strips are high-strength composite non-metallic strips or metal strips with relatively low hardness.

[0013] Preferably, guide grooves are provided at both ends of the left sleeve mold, and guide blocks are fixed at both ends of the right sleeve mold, and the guide blocks can be embedded in the guide grooves and slide.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model proposes a fracturing wellhead anti-collision wear-resistant sleeve, which successfully transforms the direct, high-strength friction contact between the casing and the drill pipe in the traditional design into a moderate contact mode between the drill pipe and the inner wall of the casing via the flexible vertical and horizontal wear-resistant strips. This innovation significantly reduces the wear and damage caused by direct friction between the two, and effectively improves the durability and operation efficiency of the entire downhole operation system. In this way, it avoids the problem that during the movement of the drill pipe, the drill pipe joint will contact the inner wall of the casing under the action of a unilateral load, and such contact will cause additional casing wear, which is not conducive to protecting the drill pipe and the casing, and will also cause the casing sealing to decrease, affecting the mining efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the second mounting hole structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the left sleeve mold structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the right sleeve mold structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the stop groove of the utility model;

[0021] Figure 6 for Figure 2 A magnified view of the structure in the middle.

[0022] In the figure: 1. straight connecting ring; 2. first upper supporting ring; 3. first mounting hole; 4. vertical anti-wear strip;

[0023] 5. Horizontal anti-wear strip; 6. Left sleeve mold; 7. First lower retaining ring; 8. Second lower retaining ring; 9. Right sleeve mold;

[0024] 10. connecting hole; 11. second upper retaining ring; 12. second mounting hole; 13. guide groove; 14. guide block;

[0025] 15. Slot; 16. Stop groove; 17. Insert rod; 18. Stop ring; 19. Spring. DETAILED DESCRIPTION

[0026] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figure 1-Figure 6 The utility model provides a technical solution: a fracturing wellhead anti-collision wear-resistant sleeve, the fracturing wellhead anti-collision wear-resistant sleeve comprises: a linear connecting ring 1, a first upper butt ring 2, a left sleeve die 6, a first lower butt ring 7, a second upper butt ring 11, a right sleeve die 9 and a second lower butt ring 8, the first upper butt ring 2 is fixed to the upper end of the left sleeve die 6, the first lower butt ring 7 is fixed to the lower end of the left sleeve die 6, the second upper butt ring 11 is fixed to the upper end of the right sleeve die 9, the second lower butt ring 8 is fixed to the lower end of the right sleeve die 9, the surfaces of the left sleeve die 6 and the right sleeve die 9 are fixed with vertical anti-wear strips 4 and transverse anti-wear strips 5, and the vertical anti-wear strips 4 and the transverse anti-wear strips 5 are cross-distributed to form a mesh structure;

[0029] When in use, the vertical anti-wear strips 4 and transverse anti-wear strips 5 on the left sleeve mold 6 and the right sleeve mold 9 successfully transform the direct, high-intensity friction contact between the casing and the drill pipe in the traditional design into a moderate contact mode between the drill pipe and the inner wall of the casing via the flexible vertical anti-wear strips 4 and transverse anti-wear strips 5. This innovation significantly reduces the wear and damage caused by direct friction between the two, and effectively improves the durability and operating efficiency of the entire downhole operation system. The vertical anti-wear strips 4 and transverse anti-wear strips 5 are cross-distributed to form a mesh structure, which increases the force strength.

[0030] Embodiment 2

[0031] On the basis of the first embodiment, the plug rod 17 is provided with a spring 19 on the surface of the plug rod 17, one end of the spring 19 is fixedly connected to the stop ring 18, the other end of the spring 19 is fixedly connected to the linear connection ring 1, the plug rod 17 is fixedly connected to the linear connection ring 1, a plurality of plug rods 17 are provided, and the plurality of plug rods 17 are equidistantly distributed on both sides of the linear connection ring 1, the end surface of the plug rod 17 is chamfered, and the stop ring 18 is slidably connected to the plug rod 17;

[0032] The upper surfaces of the first upper retaining ring 2 and the second upper retaining ring 11 are both provided with a retaining groove 16, and the bottom of the retaining groove 16 is provided with a slot 15, a retaining ring 18 can be embedded in the retaining groove 16, and an insert rod 17 can be inserted into the slot 15, and the end surface of the slot 15 is chamfered.

[0033] When in use, the left sleeve mold 6 and the right sleeve mold 9 can be installed respectively. First, the insertion rod 17 is correspondingly inserted into the slot 15, and then the stop ring 18 is correspondingly embedded in the stop groove 16. With continuous stop, the spring 19 is compressed to store elastic potential energy, and a downward thrust is applied to the left sleeve mold 6 and the right sleeve mold 9. At the same time, the first mounting hole 3 and the second mounting hole 12 can be made to correspond, and the multiple connecting holes 10 can be made to correspond, which is convenient for the subsequent installation of pins and stud bolts, and there is no need to match the holes, saving time and effort;

[0034] A second mounting hole 12 is provided on the surface of the linear connection ring 1, and a plurality of the second mounting holes 12 are provided, and the plurality of second mounting holes 12 are evenly distributed on both sides of the linear connection ring 1. A connection hole 10 is provided on the surfaces of the first upper retaining ring 2, the first lower retaining ring 7, the second upper retaining ring 11, and the second lower retaining ring 8, and a stud bolt is provided in the connection hole 10. A first mounting hole 3 is provided on the surfaces of the first upper retaining ring 2 and the second upper retaining ring 11, and the first mounting hole 3 corresponds to the second mounting hole 12, and the first mounting hole 3 and the second mounting hole 12 are connected by a pin;

[0035] When in use, after the left sleeve die 6 and the right sleeve die 9 are plugged in, the connection between the first mounting hole 3 and the second mounting hole 12 is achieved through a pin, thereby installing the left sleeve die 6 and the right sleeve die 9 on the linear connecting ring 1, and then using stud bolts to fix the left sleeve die 6 and the right sleeve die 9, while cooperating with the elastic force of the spring 19 to improve the strength of the connection.

[0036] Embodiment 3

[0037] On the basis of the second embodiment, the vertical anti-wear strip 4 and the transverse anti-wear strip 5 are high-strength composite non-metallic strips or metal strips with low hardness, the two ends of the left sleeve mold 6 are provided with guide grooves 13, and the two ends of the right sleeve mold 9 are fixed with guide blocks 14, which can be embedded in the guide grooves 13 and slide;

[0038] When in use, the vertical anti-wear strips 4 and the transverse anti-wear strips 5 are composed of high-strength composite non-metallic strips or metal strips with lower hardness to improve the anti-damage strength. When installing the left sleeve mold 6 and the right sleeve mold 9, the set guide blocks 14 are correspondingly embedded in the guide grooves 13 to achieve the fit between the left sleeve mold 6 and the right sleeve mold 9 and improve the airtightness.

[0039] In actual use, the vertical anti-wear strips 4 and the transverse anti-wear strips 5 on the left sleeve mold 6 and the right sleeve mold 9 successfully transform the direct and high-intensity friction contact between the casing and the drill pipe in the traditional design into a moderate contact mode between the drill pipe and the inner wall of the casing via the flexible vertical anti-wear strips 4 and the transverse anti-wear strips 5. This innovation significantly reduces the wear and damage caused by direct friction between the two, and effectively improves the durability and operating efficiency of the entire downhole operation system. The vertical anti-wear strips 4 and the transverse anti-wear strips 5 are cross-distributed to form a mesh structure to increase the force strength. Such contact will cause additional casing wear, which is not conducive to protecting the drill pipe and casing. At the same time, it will cause the casing sealing to decrease, affecting the mining efficiency and safety.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fracturing wellhead anti-collision wear-resistant sleeve, characterized in that: The anti-collision wear-resistant sleeve for the fracturing wellhead comprises: a linear connecting ring (1), a first upper supporting ring (2), a left sleeve mold (6), a first lower supporting ring (7), a second upper supporting ring (11), a right sleeve mold (9) and a second lower supporting ring (8); the first upper supporting ring (2) is fixed to the upper end of the left sleeve mold (6), the first lower supporting ring (7) is fixed to the lower end of the left sleeve mold (6), the second upper supporting ring (11) is fixed to the upper end of the right sleeve mold (9), and the second lower supporting ring (8) is fixed to the lower end of the right sleeve mold (9); vertical anti-wear strips (4) and transverse anti-wear strips (5) are fixed to the surfaces of the left sleeve mold (6) and the right sleeve mold (9); the vertical anti-wear strips (4) and the transverse anti-wear strips (5) are cross-distributed to form a mesh structure; The insert rod (17) has a spring (19) sleeved on its surface, one end of the spring (19) is fixedly connected to the stop ring (18), and the other end of the spring (19) is fixedly connected to the linear connection ring (1).

2. The anti-collision wear-resistant sleeve for a fracturing wellhead according to claim 1, characterized in that: The insert rod (17) is fixedly connected to the linear connection ring (1), and a plurality of insert rods (17) are provided. The plurality of insert rods (17) are equidistantly distributed on both sides of the linear connection ring (1), and the end faces of the insert rods (17) are chamfered, and the stop ring (18) is slidably connected to the insert rods (17).

3. The anti-collision wear-resistant sleeve for fracturing wellhead according to claim 1, characterized in that: A second mounting hole (12) is provided on the surface of the linear connection ring (1), and a plurality of second mounting holes (12) are provided. The plurality of second mounting holes (12) are evenly distributed on both sides of the linear connection ring (1).

4. The anti-collision wear sleeve for a fracturing wellhead according to claim 1, characterized in that: The surfaces of the first upper retaining ring (2), the first lower retaining ring (7), the second upper retaining ring (11) and the second lower retaining ring (8) are all provided with connecting holes (10), and stud bolts are arranged in the connecting holes (10).

5. The anti-collision wear-resistant sleeve for fracturing wellhead according to claim 1, characterized in that: The surfaces of the first upper retaining ring (2) and the second upper retaining ring (11) are both provided with a first mounting hole (3), the first mounting hole (3) and the second mounting hole (12) correspond to each other, the first mounting hole (3) and the second mounting hole (12) are connected by a pin, the upper surfaces of the first upper retaining ring (2) and the second upper retaining ring (11) are both provided with a stop groove (16), the bottom of the stop groove (16) is provided with a slot (15), the stop ring (18) can be embedded in the stop groove (16), the insertion rod (17) can be inserted into the slot (15), and the end surface of the slot (15) is chamfered.

6. The anti-collision wear sleeve for a fracturing wellhead according to claim 1, characterized in that: The vertical anti-wear strips (4) and the transverse anti-wear strips (5) are high-strength composite non-metallic strips or metal strips with relatively low hardness.

7. The anti-collision wear sleeve for a fracturing wellhead according to claim 1, characterized in that: The two ends of the left sleeve mold (6) are provided with guide grooves (13), and the two ends of the right sleeve mold (9) are fixed with guide blocks (14), which can be embedded in the guide grooves (13) and slide.

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