Well drilling cross with high sulfur resistance and erosion resistance

Abstract

The utility model relates to the technical field of four-way joints, in particular to a well drilling four-way joint with high sulfur resistance and erosion resistance, which comprises a four-way joint body, a hard alloy inner pipe sleeved on the periphery of the four-way joint body, a connecting pipe sleeved outside the hard alloy inner pipe, a locking hoop sleeved at one end of the connecting pipe, a connecting seat arranged on one side of the locking hoop, and a connecting ring arranged on the other side of the locking hoop. A double-end stud is installed in the connecting ring, and the two ends of the double-end stud are sleeved with nuts in a threaded mode. The four-way joint has the advantages that one end of the hard alloy inner pipe is arranged in the main diameter opening and the bypass diameter opening of the four-way joint body in a sleeved mode, so that the hard alloy inner pipe is fixedly arranged in the four-way joint body in a sleeved mode, and therefore through the arrangement of the hard alloy pipe, the situation that the main diameter opening and an outlet (a bypass blowout opening) of the four-way joint body are communicated is avoided; and when disassembly and maintenance are needed, only the supporting sleeve needs to be disassembled, and the connecting pipe and the hard alloy inner pipe need to be replaced, so that convenience and rapidness in disassembly and maintenance are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of four-way joints, in particular to a high-sulfur-resistant and erosion-resistant drilling four-way joint. Background Art

[0002] Highly sulfur-resistant and erosion-resistant drilling spool. This type of spool is suitable for drilling environments with high sulfur content and high erosion, especially in harsh working conditions such as offshore platforms and deep oil and gas fields, to ensure operational safety and equipment reliability.

[0003] In the prior art, drilling spools are made of integral cast steel or integral forgings. However, in actual use conditions of high-pressure hydrogen sulfide-containing materials, erosion and leakage often occur at the main bore and the outlet (bypass blowout port), which cannot be repaired and is troublesome to replace, requiring the removal of the blowout preventer and other devices. Utility Model Content

[0004] The utility model aims to provide a high sulfur-resistant and erosion-resistant drilling spool to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a highly sulfur-resistant and erosion-resistant drilling spool, comprising: a spool body, a carbide inner tube sheathed around the spool body, a connecting tube sheathed outside the carbide inner tube, and a locking hoop sheathed at one end of the connecting tube.

[0006] A connecting seat is arranged on one side of the locking hoop, and a connecting ring is arranged on the other side of the locking hoop. A stud is installed in the connecting ring, and nuts are arranged on the threaded sleeves at both ends of the stud.

[0007] Preferably, one end of the cemented carbide inner tube is sleeved inside the cross body and abuts against the inner wall of the cross body, and the other end of the cemented carbide inner tube is fixedly sleeved in the connecting tube.

[0008] Preferably, a slot is provided on one side of the connecting pipe, the slot is slidably plugged into the pipe body of the four-way main body, and the other end of the connecting pipe is slidably sleeved in the supporting sleeve.

[0009] Preferably, a fixing plate is provided on one side of the connecting ring, through holes are opened on both sides of the surface of the fixing plate, one end of the locking hoop is fixedly sleeved in the through hole, and the other end of the locking hoop is movably clamped in the clamping ring.

[0010] Preferably, a threaded hole is opened on one side of the through hole, a bolt is sleeved in the threaded hole, one end of the bolt is fixedly connected to the limiting column, and the clamping ring is sleeved on the limiting column and rotatably connected to the limiting column.

[0011] Preferably, limiting rings are provided on both sides of the limiting column, the limiting ring fixing sleeve is provided on the outer ring surface of the connecting pipe, one end of the supporting sleeve abuts against the limiting ring, and the other end of the supporting sleeve is fixed with a connecting flange.

[0012] Preferably, one end of the stud is sleeved in the connecting ring, and the other end of the stud is sleeved in the connecting seat, and one side of the connecting seat is fixedly connected to the outer ring surface of the tube body of the four-way body.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: one end of the carbide inner tube is sleeved in the main diameter opening and the bypass diameter opening of the four-way body, so that one end of the connecting tube is abutted against one side of the connecting seat, the connecting tube is fastened with a locking hoop, and the connecting tube is fixedly sleeved on the outer ring surface of the tube body of the four-way body, so that the carbide inner tube is fixedly sleeved inside the four-way body, and then through the setting of the carbide inner tube, the problem of erosion and leakage that often occurs at the main diameter hole of the four-way body and the outlet bypass discharge nozzle is avoided, the connecting ring and the connecting seat are fixed by studs, so that the support sleeve fixes and supports the connecting tube to ensure its stability, and when disassembly and maintenance are required, only the support sleeve needs to be removed, and the connecting tube and the carbide inner tube need to be replaced, thereby achieving convenient disassembly and repair, simple replacement, and improving the practicality of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a bottom view schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a top view schematic diagram of the overall structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the utility model;

[0018] In the figure: 1. four-way body; 2. carbide inner tube; 3. connecting tube; 4. locking hoop; 5. connecting seat; 6. connecting ring; 7. stud; 8. nut; 9. slot; 10. support sleeve; 11. fixing plate; 12. through hole; 13. threaded hole; 14. bolt; 15. limit column; 16. limit ring; 17. connecting flange; 18. retaining ring. DETAILED DESCRIPTION

[0019] 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.

[0020] Embodiment 1

[0021] See also Figure 1-Figure 4 The utility model provides a technical solution: a highly sulfur-resistant and erosion-resistant drilling spool, comprising: a spool body 1, a carbide inner tube 2 is sleeved around the spool body 1, a connecting pipe 3 is sleeved outside the carbide inner tube 2, a locking hoop 4 is sleeved at one end of the connecting pipe 3, a connecting seat 5 is arranged on one side of the locking hoop 4, a connecting ring 6 is arranged on the other side of the locking hoop 4, a stud 7 is installed in the connecting ring 6, and nuts 8 are threadedly sleeved at both ends of the stud 7.

[0022] One end of the carbide inner tube 2 is sleeved in the main diameter opening and bypass diameter opening of the four-way body 1, so that one end of the connecting tube 3 is abutted against one side of the connecting seat 5, and the connecting tube 3 is fastened with a locking hoop 4, so that the connecting tube 3 is fixedly sleeved on the outer ring surface of the tube body of the four-way body 1, so that the carbide inner tube 2 is fixedly sleeved inside the four-way body 1, and then through the setting of the carbide inner tube 2, the problem of erosion and leakage that often occurs at the main diameter hole of the four-way body 1 and the outlet bypass discharge nozzle is avoided, and the connecting ring 6 and the connecting seat 5 are fixed by the stud 7, so that the support sleeve 10 fixes and supports the connecting tube 3 to ensure its stability. When disassembly and maintenance are required, it is only necessary to remove the support sleeve 10 and replace the connecting tube 3 and the carbide inner tube 2, thereby achieving convenient disassembly and repair, simple operation, and improving the practicality of the entire device.

[0023] Embodiment 2

[0024] On the basis of the first embodiment, one end of the carbide inner tube 2 is sleeved inside the four-way body 1 and abuts against the inner wall of the four-way body 1, and the other end of the carbide inner tube 2 is fixedly sleeved in the connecting tube 3. The carbide inner tube 2 is slidably sleeved in the tube body of the four-way body 1, thereby protecting the main diameter hole and the outlet bypass discharge nozzle of the four-way body 1 from erosion and leakage. A slot 9 is provided on one side of the connecting tube 3, and the slot 9 is slidably plugged into the tube body of the four-way body 1. The other end of the connecting tube 3 is slidably sleeved in the supporting sleeve 10. The slot 9 provided on one side of the connecting tube 3 facilitates the connection between the connecting tube 3 and the tube body of the four-way body 1, and the supporting sleeve 10 is used to connect the connecting tube 3. A limiting support is provided on one side of the connecting ring 6, and through holes 12 are provided on both sides of the surface of the fixing plate 11. One end of the locking hoop 4 is fixedly sleeved in the through hole 12, and the other end of the locking hoop 4 is movably clamped in the clamping ring 18. The through hole 12 provided in the fixing plate 11 fixes one end of the locking hoop 4, and the clamping ring 18 limits the other end of the locking hoop 4. A threaded hole 13 is provided on one side of the through hole 12, and a bolt 14 is sleeved in the threaded hole 13. One end of the bolt 14 is fixedly connected to the limiting column 15, and the clamping ring 18 is sleeved on the limiting column 15 and rotatably connected to the limiting column 15. The bolt 14 is threadedly connected to the threaded hole 13, and the clamping ring 18 is rotatably sleeved on the limiting column 15.

[0025] Insert one end of the carbide inner tube 2 into the inner wall of the tube body of the four-way body 1, and insert the slot 9 provided in the connecting tube 3 into the outer ring of the four-way body 1. At this time, sleeve the locking hoop 4 on the outer ring surface of the connecting tube 3, twist the bolt 14, and since the bolt 14 is threadedly connected with the threaded hole 13 provided on the fixing plate 11, the bolt 14 moves in the fixing plate 11, and one end of the bolt 14 is fixedly connected with the limiting column 15, so that the limiting column 15 rotates in the retaining ring 18 and drives the retaining ring 18 to press one end of the locking hoop 4 to move, and the other end of the locking hoop 4 is fixedly sleeved in the fixing plate 11, so that under the drive of the bolt 14, the locking hoop 4 is tightened inward, so that the locking hoop 4 fastens the connecting tube 3 to the outside of the tube body of the four-way body 1.

[0026] Embodiment 3

[0027] On the basis of the second embodiment, limiting rings 16 are arranged on both sides of the limiting column 15, and the limiting rings 16 are fixedly sleeved on the outer ring surface of the connecting pipe 3. One end of the support sleeve 10 is in contact with the limiting ring 16, and the other end of the support sleeve 10 is fixedly sleeved with a connecting flange 17. A group of two limiting rings 16 are provided and are symmetrically arranged about the central plane of the locking hoop 4. The support sleeve 10 is sleeved on the outer ring surface of the connecting pipe 3 to support and fix the connecting pipe 3. The connecting flange 17 fixedly installed at the other end of the support sleeve 10 is convenient for docking with the blowout preventer and other equipment. One end of the stud 7 is sleeved in the connecting ring 6, and the other end of the stud 7 is sleeved in the connecting seat 5. One side of the connecting seat 5 is fixedly connected to the outer ring surface of the pipe body of the four-way body 1, and one side of the connecting seat 5 is fixedly installed on the outer side of the pipe body of the four-way body 1. Mounting holes are provided on the connecting seat 5 and the connecting ring 6 to facilitate the fixing of the stud 7.

[0028] One end of the stud 7 is sleeved in the connecting ring 6, and then the support sleeve 10 is sleeved on the outer ring surface of the connecting pipe 3 so that one end of the connecting pipe 3 abuts against the limiting ring 16. At the same time, the other end of the stud 7 is inserted into the connecting seat 5. At this time, the nuts 8 are tightened on both ends of the stud 7, so that the support sleeve 10 is fixed on the outer ring of the connecting pipe 3, and then the support sleeve 10 supports the connecting pipe 3 in a limited manner. One end of the support sleeve 10 is fixedly sleeved with a connecting flange 17. The setting of the connecting flange 17 facilitates the prevention of connection and installation of the sprayer with other devices.

[0029] In actual use, one end of the carbide inner tube 2 is inserted into the inner wall of the tube body of the four-way body 1, and the slot 9 provided on the connecting tube 3 is inserted into the outer ring of the four-way body 1. At this time, the locking hoop 4 is sleeved on the outer ring surface of the connecting tube 3, and the bolt 14 is twisted. Since the bolt 14 is threadedly connected with the threaded hole 13 provided on the fixing plate 11, the bolt 14 moves in the fixing plate 11, and one end of the bolt 14 is fixedly connected with the limiting column 15, so that the limiting column 15 rotates in the retaining ring 18 and drives the retaining ring 18 to press one end of the locking hoop 4 to move, and the other end of the locking hoop 4 is fixedly sleeved in the fixing plate 11, so that the locking hoop 4 is tightened inwardly under the drive of the bolt 14, so that the locking hoop 4 fastens the connecting tube 3 to the outside of the tube body of the four-way body 1, and one end of the stud 7 is sleeved on In the connecting ring 6, the support sleeve 10 is sleeved on the outer ring surface of the connecting pipe 3 so that one end of the connecting pipe 3 is abutted against the limiting ring 16, and the other end of the stud 7 is inserted into the connecting seat 5. At this time, the nuts 8 are fastened to the two ends of the stud 7, so that the support sleeve 10 is fixed on the outer ring of the connecting pipe 3, and then the support sleeve 10 supports the connecting pipe 3 in a limited manner. A connecting flange 17 is fixed at one end of the support sleeve 10. The setting of the connecting flange 17 facilitates the prevention of connection and installation of the injector with other devices, so that the carbide inner tube 2 set in the four-way body 1 can avoid the actual use conditions of high-pressure hydrogen sulfide-containing substances: the main diameter hole and the outlet bypass discharge nozzle often have erosion and leakage problems. At the same time, a split installation structure is adopted in the original prone to leakage, which is fast to dismantle and repair and convenient to replace.

[0030] 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 highly sulfur-resistant and erosion-resistant drilling spool, comprising a spool body (1), characterized in that: The four-way body (1) is sheathed with a hard alloy inner tube (2) on all sides, the hard alloy inner tube (2) is sheathed with a connecting tube (3) on the outside, and one end of the connecting tube (3) is sheathed with a locking hoop (4); A connecting seat (5) is arranged on one side of the locking hoop (4), and a connecting ring (6) is arranged on the other side of the locking hoop (4). A stud bolt (7) is installed in the connecting ring (6), and nuts (8) are threadedly sleeved at both ends of the stud bolt (7).

2. The high sulfur and erosion resistance drilling spool according to claim 1, characterized in that: One end of the hard alloy inner tube (2) is sleeved inside the four-way body (1) and abuts against the inner wall of the four-way body (1), and the other end of the hard alloy inner tube (2) is fixedly sleeved inside the connecting tube (3).

3. The high sulfur and erosion resistance drilling spool according to claim 2, characterized in that: A slot (9) is provided on one side of the connecting pipe (3), the slot (9) is slidably plugged into the pipe body of the four-way main body (1), and the other end of the connecting pipe (3) is slidably sleeved in the supporting sleeve (10).

4. The high sulfur and erosion resistance drilling spool according to claim 3, characterized in that: A fixing plate (11) is provided on one side of the connecting ring (6), through holes (12) are provided on both sides of the surface of the fixing plate (11), one end of the locking hoop (4) is fixedly sleeved in the through hole (12), and the other end of the locking hoop (4) is movably clamped in the clamping ring (18).

5. The high sulfur and erosion resistance drilling spool according to claim 4, characterized in that: A threaded hole (13) is provided on one side of the through hole (12), a bolt (14) is sleeved on the threaded hole (13), one end of the bolt (14) is fixedly connected to a limiting column (15), and a clamping ring (18) is sleeved on the limiting column (15) and rotatably connected to the limiting column (15).

6. The high sulfur and erosion resistance drilling spool according to claim 5, characterized in that: Limiting rings (16) are arranged on both sides of the limiting column (15), and the limiting rings (16) are fixedly sleeved on the outer ring surface of the connecting pipe (3). One end of the supporting sleeve (10) is in contact with the limiting ring (16), and the other end of the supporting sleeve (10) is fixedly sleeved with a connecting flange (17).

7. The high sulfur and erosion resistance drilling spool according to claim 6, characterized in that: One end of the stud bolt (7) is sleeved in the connecting ring (6), and the other end of the stud bolt (7) is sleeved in the connecting seat (5). One side of the connecting seat (5) is fixedly connected to the outer ring surface of the tube body of the four-way body (1).

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