Wellhead fracturing device for petroleum drilling and production

Abstract

The utility model belongs to the technical field of petroleum drilling and production, and particularly relates to a petroleum drilling and production wellhead fracturing device which comprises a first connecting pipe. The end part of the first connecting pipe is connected with a second connecting pipe; a first clamping groove is formed in the end part of the first connecting pipe; a first convex block is arranged at the end part of the first connecting pipe; a second clamping groove is formed in the end part of the second connecting pipe; a second protruding block is arranged at the end of the second connecting pipe. The first protruding block is connected with the second clamping groove in a clamped mode. The first clamping groove is connected with the second protruding block in a clamped mode. In the step, a first clamping groove and a first convex block are respectively clamped and matched with a second convex block and a second clamping groove, so that two arched barriers can be formed; the contact surface between the ends of the first connecting pipe and the second connecting pipe is increased, so that the first connecting pipe and the second connecting pipe are connected more tightly, the situation that liquid leaks from the joint of the first connecting pipe and the second connecting pipe due to large water pressure can be reduced, and the stability of the joint is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling and production, in particular to an oil drilling and production wellhead fracturing device. Background Art

[0002] Oil is an important energy source. In the process of oil extraction, fracturing is usually used for extraction. Using hydraulic power to form cracks in oil and gas layers is also called hydraulic fracturing. At this time, an oil drilling wellhead fracturing device is needed to extract oil.

[0003] The fracturing pump is an important component of the existing oil drilling wellhead fracturing device. When in use, the fracturing pump is connected to the pipeline and then the fracturing pump pressurizes water and sends it into the pipeline to perform fracturing on the oil in the oil well. During long-term use and observation, it is found that the fracturing pump of the existing oil drilling wellhead fracturing device pressurizes water and then sends it into the connected pipeline when working. When the water flows in the pipeline, due to the large hydraulic pressure, there is a problem that the connection will become loose and leak due to the long-term high water pressure on the connection.

[0004] To this end, the utility model provides a petroleum drilling wellhead fracturing device. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one problem raised in the background technology, a petroleum drilling wellhead fracturing device is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an oil drilling wellhead fracturing device described in the utility model comprises a first connecting pipe; the end of the first connecting pipe is connected to the second connecting pipe; the end of the first connecting pipe is provided with a first clamping groove; the end of the first connecting pipe is provided with a first protrusion; the end of the second connecting pipe is provided with a second clamping groove; the end of the second connecting pipe is provided with a second protrusion; the first protrusion and the second clamping groove are in a clamping connection; the first clamping groove and the second protrusion are in a clamping connection; the first connecting pipe and the second connecting pipe are bolted together; this step can form two arched barriers by setting the first clamping groove and the first protrusion to be clamped with the second protrusion and the second clamping groove respectively, so as to increase the contact surface between the ends of the first connecting pipe and the second connecting pipe, so as to make the first connecting pipe and the second connecting pipe connected more tightly, and reduce the leakage from the connection between the first connecting pipe and the second connecting pipe due to high water pressure, so as to improve the stability of the connection.

[0007] Preferably, the side walls of the first connecting tube and the second connecting tube are provided with a plurality of fixing frames; a threaded rod is threadedly connected to the top of the fixing frame; a fixing block is fixedly connected to the end of the threaded rod; in this step, the first connecting tube and the second connecting tube can be clamped and fixed from the outside by setting the fixing frame to connect the threaded rod and the fixing block, so as to reduce the looseness of the connection between the first connecting tube and the second connecting tube due to the high internal water pressure, so as to improve the tightness of the connection between the first connecting tube and the second connecting tube.

[0008] Preferably, a plurality of sliding holes are provided in the middle of the fixing block; a spring rod is slidably connected in the sliding hole; in this step, the fixing block is arranged to connect the spring rod so that the spring rod can contact the surface of the first connecting tube. When the surface of the first connecting tube is an irregular surface, the ends of the plurality of spring rods contact the irregular surface. At this time, the spring rods will respectively produce different degrees of stretching to increase the contact area between the fixing block and the surface of the first connecting tube, thereby improving the clamping and fixing effect of the first connecting tube and the second connecting tube.

[0009] Preferably, a sealing gasket is provided between the first connecting tube and the second connecting tube; the sealing gasket is arranged in an arch shape; this step can reduce the gap between the first slot and the second bump and between the first bump and the second slot when they are engaged and connected by arranging the sealing gasket to cover the first slot, the first protrusion, the second slot, and the second protrusion, so as to improve the tightness of the connection between the first connecting tube and the second connecting tube and reduce leakage at the connection.

[0010] Preferably, a pair of sealing strips are fixedly connected to the side wall of the sealing gasket; the pair of sealing strips are arranged alternately; in this step, the sealing strips are arranged to deform when the first slot and the second protrusion and the first protrusion and the second slot are engaged and connected, thereby filling the gaps between the sealing gasket and the first slot and the second protrusion and the first protrusion and the side wall of the second slot, so as to improve the tightness during connection and reduce leakage.

[0011] Preferably, a pair of buffer springs are fixedly connected to the side wall of the fixing frame; the ends of the pair of buffer springs are commonly fixedly connected to a protective plate; in this step, the buffer springs are arranged to connect the fixing frame and the protective plate so as to block the falling rocks and clods of earth, and when the rocks and clods of earth come into contact, the buffer springs will contract to provide a buffering force, thereby reducing the impact force generated during collision.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model discloses a petroleum drilling wellhead fracturing device, which can form two arched barriers by arranging a first slot and a first protrusion to engage with the second protrusion and the second slot respectively, so as to increase the contact surface between the ends of the first connecting pipe and the second connecting pipe, so as to make the first connecting pipe and the second connecting pipe connected more tightly, and reduce the leakage from the connection between the first connecting pipe and the second connecting pipe due to high water pressure, so as to improve the stability of the connection.

[0014] 2. The oil drilling wellhead fracturing device described in the utility model can clamp and fix the first connecting pipe and the second connecting pipe from the outside by setting a fixing frame to connect the threaded rod and the fixing block, so as to reduce the loosening of the connection between the first connecting pipe and the second connecting pipe due to the high internal water pressure, so as to improve the tightness of the connection between the first connecting pipe and the second connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a stereogram in the utility model;

[0017] Figure 2 It is a cross-sectional view in the utility model;

[0018] Figure 3 It is a schematic diagram of the matching structure of the first connecting pipe, the second connecting pipe, the sealing gasket and the sealing strip in the utility model;

[0019] Figure 4 It is a schematic diagram of the matching structure of the fixing frame and the protective plate in the utility model;

[0020] Figure 5 It is a schematic diagram of the matching structure of the spring rod and the suction cup in the utility model;

[0021] Legend:

[0022] 1. First connecting tube; 11. Second connecting tube; 12. First slot; 13. First protrusion; 14. Second slot; 15. Second protrusion; 16. Bolt; 2. Fixing frame; 21. Threaded rod; 22. Fixing block; 3. Sliding hole; 31. Spring rod; 4. Sealing pad; 5. Sealing strip; 6. Buffer spring; 61. Protective plate; 7. Suction cup. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on 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.

[0024] Specific examples are given below.

[0025] like Figures 1 to 3As shown, a petroleum drilling wellhead fracturing device according to an embodiment of the utility model comprises a first connecting pipe 1; the end of the first connecting pipe 1 is connected to a second connecting pipe 11; the end of the first connecting pipe 1 is provided with a first groove 12; the end of the first connecting pipe 1 is provided with a first protrusion 13; the end of the second connecting pipe 11 is provided with a second groove 14; the end of the second connecting pipe 11 is provided with a second protrusion 15; the first protrusion 13 and the second groove 14 are snap-fitted; the first groove 12 and the second protrusion 15 are snap-fitted; the first connecting pipe 1 and the second connecting pipe 11 are bolted together by bolts 16; when working, the first groove 12 and the first protrusion 13 at the end of the first connecting pipe 1 are respectively snap-fitted to the second groove 14; the first groove 12 and the second protrusion 15 are snap-fitted to the second groove 15; the first connecting pipe 1 and the second connecting pipe 11 are bolted together by bolts 16; when the fracturing pump is connected, the first groove 12 and the first protrusion 13 at the end of the first connecting pipe 1 are respectively snap-fitted to the first groove 14; the first groove 12 and the second protrusion 15 are snap-fitted to the second groove 15; the first connecting pipe 1 and the second connecting pipe 11 are bolted together by bolts 16; when working, the first groove 12 and the first protrusion 13 at the end of the first connecting pipe 1 are snap-fitted to the second groove 14; the first groove 12 and the second protrusion 15 are snap-fitted to the second groove 15; the first connecting pipe 1 and the second connecting pipe 11 are bolted together by bolts 16; when working, the first groove 12 and the first protrusion 13 at the end The second protrusion 15 and the second groove 14 at the end of the second connecting tube 11 are aligned, and at this time, the first groove 12 and the second protrusion 15 and the first protrusion 13 and the second groove 14 are respectively clamped together, and then the first connecting tube 1 and the second connecting tube 11 are bolted together by the bolt 16 to complete the connection. In this step, two arched barriers can be formed by setting the first groove 12 and the first protrusion 13 to be clamped with the second protrusion 15 and the second groove 14 respectively, so as to increase the contact surface between the ends of the first connecting tube 1 and the second connecting tube 11, so that the first connecting tube 1 and the second connecting tube 11 are connected more tightly, which can reduce the leakage from the connection between the first connecting tube 1 and the second connecting tube 11 due to high water pressure, so as to improve the stability of the connection.

[0026] like Figure 1 and Figure 4 As shown, the side walls of the first connecting tube 1 and the second connecting tube 11 are provided with a plurality of fixing frames 2; the top of the fixing frame 2 is threadedly connected with a threaded rod 21; the end of the threaded rod 21 is fixedly connected with a fixing block 22; during operation, after the first connecting tube 1 and the second connecting tube 11 are connected, the plurality of fixing frames 2 are respectively placed around the first connecting tube 1 and the second connecting tube 11, and then the fixing block 22 is driven to move toward the surface of the first connecting tube 1 by rotating the threaded rod 21, and when the fixing block 22 contacts the surface of the first connecting tube 1, the first connecting tube 1 and the second connecting tube 11 can be clamped and fixed in cooperation with the fixing frame 2. In this step, the first connecting tube 1 and the second connecting tube 11 can be clamped and fixed from the outside by setting the fixing frame 2 to connect the threaded rod 21 and the fixing block 22, so as to reduce the loosening of the connection of the first connecting tube 1 and the second connecting tube 11 due to the high internal water pressure, so as to improve the tightness of the connection between the first connecting tube 1 and the second connecting tube 11.

[0027] like Figure 5As shown, a plurality of sliding holes 3 are opened in the middle of the fixing block 22; a spring rod 31 is slidably connected in the sliding hole 3; during operation, when the threaded rod 21 drives the fixing block 22 to move toward the surface of the first connecting tube 1, it will drive the spring rod 31 to move toward the surface of the first connecting tube 1 at the same time; when the surface of the first connecting tube 1 is an irregular plane, the end of the spring rod 31 will contact the irregular surface; when continuing to move toward the surface of the first connecting tube 1, the plurality of spring rods 31 will respectively produce different degrees of stretching and generate rebound force to clamp and fix the surface of the first connecting tube 1. In this step, the fixing block 22 is arranged to connect the spring rod 31 so that it can contact the surface of the first connecting tube 1. When the surface of the first connecting tube 1 is an irregular surface, the ends of the plurality of spring rods 31 contact the irregular surface. At this time, the spring rods 31 will respectively produce different degrees of stretching to increase the contact surface between the fixing block 22 and the surface of the first connecting tube 1, which can improve the clamping and fixing effect of the first connecting tube 1 and the second connecting tube 11.

[0028] like Figure 3 As shown, a sealing gasket 4 is provided between the first connecting tube 1 and the second connecting tube 11; the sealing gasket 4 is arranged in an arc shape; during operation, when the first connecting tube 1 and the second connecting tube 11 are connected, the sealing gasket 4 is located at the connection between the first connecting tube 1 and the second connecting tube 11 and can cover the first card groove 12, the first protrusion 13, the second card groove 14, and the second protrusion 15, which can increase the tightness of the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 when they are engaged and connected. In this step, by arranging the sealing gasket 4 to cover the first card groove 12, the first protrusion 13, the second card groove 14, and the second protrusion 15, the gap between the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 when they are engaged and connected can be reduced, so as to improve the tightness of the connection between the first connecting tube 1 and the second connecting tube 11 and reduce the leakage at the connection.

[0029] like Figure 3 As shown, a pair of sealing strips 5 are fixedly connected to the side wall of the sealing gasket 4; the pair of sealing strips 5 are arranged in a staggered manner; during operation, after the sealing gasket 4 is placed at the connection, the pair of sealing strips 5 are respectively located on the sides of the engagement positions of the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14. When engaging, the sealing strip 5 is arranged in an arc shape. The first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 will squeeze the sealing strip 5 to deform it, and can fill the gap between the sealing gasket 4 and the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 side walls. In this step, the sealing strip 5 is arranged to deform when the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 are engaged and connected, and the gap between the sealing gasket 4 and the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 side walls are filled, so as to improve the tightness during connection and reduce the occurrence of leakage.

[0030] like Figure 4 As shown, a pair of buffer springs 6 are fixedly connected to the side wall of the fixing frame 2; the ends of the pair of buffer springs 6 are commonly fixedly connected to a protective plate 61; when working, in a rocky area or an area with a harder soil layer, when stones or soil blocks fall to the connection between the first connecting pipe 1 and the second connecting pipe 11, the protective plate 61 will block the fallen rocks and soil blocks. In this step, the buffer springs 6 are arranged to connect the fixing frame 2 and the protective plate 61 to block the fallen rocks and soil blocks. When the rocks and soil blocks come into contact, the buffer springs 6 will generate a contraction force to provide a buffering force, thereby reducing the impact force generated during the collision.

[0031] like Figure 5 As shown, the end of the spring rod 31 is fixedly connected with a suction cup 7; during operation, when the end of the spring rod 31 contacts the surface of the first connecting tube 1, the suction cup 7 will be adsorbed on the surface of the first connecting tube 1. In this step, the suction cup 7 is provided to connect the spring rod 31 so that it can be adsorbed on the surface of the first connecting tube 1 to increase the tightness of the connection between the spring rod 31 and the surface of the first connecting tube 1, so as to improve the clamping and fixing effect of the connection.

[0032] Working principle: When working, when connecting the fracturing pump, the first slot 12 and the first protrusion 13 at the end of the first connecting pipe 1 are aligned with the second protrusion 15 and the second slot 14 at the end of the second connecting pipe 11 respectively. At this time, the first slot 12 and the second protrusion 15 and the first protrusion 13 and the second slot 14 are respectively clamped together, and then the first connecting pipe 1 and the second connecting pipe 11 are bolted together by bolts 16 to complete the connection. After the first connecting pipe 1 and the second connecting pipe 11 are connected, multiple fixing frames 2 are placed around the first connecting pipe 1 and the second connecting pipe 11 respectively, and then The threaded rod 21 is rotated to drive the fixing block 22 to move toward the surface of the first connecting tube 1. When the fixing block 22 contacts the surface of the first connecting tube 1, the fixing frame 2 can be used to clamp and fix the first connecting tube 1 and the second connecting tube 11. When the threaded rod 21 drives the fixing block 22 to move toward the surface of the first connecting tube 1, the spring rod 31 is driven to move toward the surface of the first connecting tube 1 at the same time. When the surface of the first connecting tube 1 is an irregular plane, the end of the spring rod 31 will contact the irregular surface. When continuing to move toward the surface of the first connecting tube 1, the multiple spring rods 31 will be stretched to different degrees and produce The rebound force clamps and fixes the surface of the first connecting tube 1. When the first connecting tube 1 is connected to the second connecting tube 11, the sealing gasket 4 is located at the connection between the first connecting tube 1 and the second connecting tube 11 and can cover the first card groove 12, the first protrusion 13, the second card groove 14, and the second protrusion 15, which can increase the tightness of the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14 when they are engaged. After the sealing gasket 4 is placed at the connection, a pair of sealing strips 5 are respectively located on the sides of the engagement positions of the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14. When the sealing gasket 4 is placed at the connection, a pair of sealing strips 5 are respectively located on the sides of the engagement positions of the first card groove 12 and the second protrusion 15 and the first protrusion 13 and the second card groove 14. When engaged, the sealing strip 5 is arranged in an arc shape, and the first groove 12 and the second protrusion 15 and the first protrusion 13 and the second groove 14 will squeeze the sealing strip 5 to deform it, and fill the gap between the sealing gasket 4 and the side walls of the first groove 12 and the second protrusion 15 and the first protrusion 13 and the second groove 14. When in a rocky area or an area with a harder soil layer, when stones or soil blocks fall to the connection between the first connecting pipe 1 and the second connecting pipe 11, the protective plate 61 will block the fallen rocks and soil blocks, and when the end of the spring rod 31 contacts the surface of the first connecting pipe 1, the suction cup 7 will be adsorbed on the surface of the first connecting pipe 1.

[0033] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A petroleum drilling wellhead fracturing device, comprising a first connecting pipe (1); characterized in that: The end of the first connecting tube (1) is connected to the second connecting tube (11); the end of the first connecting tube (1) is provided with a first clamping groove (12); the end of the first connecting tube (1) is provided with a first protrusion (13); the end of the second connecting tube (11) is provided with a second clamping groove (14); the end of the second connecting tube (11) is provided with a second protrusion (15); the first protrusion (13) and the second clamping groove (14) are in a clamping connection; the first clamping groove (12) and the second protrusion (15) are in a clamping connection; the first connecting tube (1) and the second connecting tube (11) are bolted together by bolts (16).

2. The oil drilling wellhead fracturing device according to claim 1, characterized in that: The side walls of the first connecting tube (1) and the second connecting tube (11) are provided with a plurality of fixing frames (2); the top of the fixing frame (2) is threadedly connected to a threaded rod (21); and the end of the threaded rod (21) is fixedly connected to a fixing block (22).

3. The oil drilling wellhead fracturing device according to claim 2, characterized in that: A plurality of sliding holes (3) are provided in the middle of the fixed block (22); spring rods (31) are slidably connected in the sliding holes (3).

4. The oil drilling wellhead fracturing device according to claim 3, characterized in that: A sealing gasket (4) is provided between the first connecting pipe (1) and the second connecting pipe (11); the sealing gasket (4) is arranged in an arcuate shape.

5. The oil drilling wellhead fracturing device according to claim 4, characterized in that: A pair of sealing strips (5) are fixedly connected to the side wall of the sealing pad (4); the pair of sealing strips (5) are arranged in a staggered manner.

6. The oil drilling wellhead fracturing device according to claim 5, characterized in that: A pair of buffer springs (6) are fixedly connected to the side wall of the fixing frame (2); and a protective plate (61) is fixedly connected to the ends of the pair of buffer springs (6).

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