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 an upper connecting pipe and a lower connecting pipe, and is characterized in that an inner sealing sleeve is fixedly connected to the inner wall of the upper connecting pipe and the inner wall of the lower connecting pipe, and a fixing pipe is slidably connected to the inner wall of the inner sealing sleeve; the outer wall of the upper connecting pipe and the outer wall of the lower connecting pipe are fixedly connected with filling blocks corresponding to the inner clamping holes, outer clamping holes communicated with the inner clamping holes are formed in the filling blocks, and the inner clamping holes are connected with the filling blocks through adjusting plates. The butt joint ring, the inner sealing annular plate and the outer sealing annular plate are matched to form an I shape, the sealing performance of the connecting position of the upper connecting pipe and the lower connecting pipe is guaranteed, meanwhile, the two ends of the fixing pipe are located in the upper connecting pipe and the lower connecting pipe, and the sealing performance of the connecting position of the upper connecting pipe and the lower connecting pipe is guaranteed. And the influence of vibration of the upper connecting pipe and the lower connecting pipe can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling and production, and particularly relates to a fracturing device for an oil drilling and production wellhead. Background Technique

[0002] In the oil field, fracturing refers to a method of forming fractures in oil and gas reservoirs by using hydraulic action during oil or gas production, also known as hydraulic fracturing. The fracturing equipment used in the fracturing process, such as a fracturing pump, is one of the main equipment to increase oil production. With the increasing requirement for oil production rate, fracturing pumps are also developing in the direction of high power, high pressure, large displacement, and large volume. However, the existing fracturing device for an oil drilling and production wellhead has the following problems during use. Due to the hydraulic action, the force on the connection is relatively large, which may cause liquid leakage at the connection.

[0003] After retrieval, the "fracturing device for an oil drilling and production wellhead" with the application number CN202320296512.1 is installed inside the slot through a clamping block, and the position is extruded against the side of the sealing plate to enhance the sealing performance. At the same time, the deformation plate is pressed against the inner wall of the sealing groove, and the supporting force of the deformation plate is further enhanced by the deformation force of the supporting plate. The first connecting pipe and the second connecting pipe are fixedly connected together through screw threads, and the connecting block further facilitates the installation and disassembly of the screws, avoiding the occurrence of liquid leakage at the connection.

[0004] However, during normal use, due to the hydraulic pressure being transported by the fracturing pump, the pressure on the pipeline is relatively large, and the water flow velocity in the pipe is too fast, causing the water flow to be unstable and vibrate. When the pipeline vibrates, the connection part of the pipeline will become loose, the weld will crack, the pipeline will be damaged by fatigue, and even cracks and perforations will occur, resulting in leakage, which is not conducive to the sealed transportation of the liquid in the pipeline and affects the fracturing work. Content of the Utility Model

[0005] The utility model provides a fracturing device for an oil drilling and production wellhead, which has the characteristic of solving the problem that when two pipelines are directly connected by a connecting piece during pipeline connection, the connection firmness is easily affected greatly by pipeline vibration.

[0006] The utility model provides the following technical solution: it includes an upper connecting tube and a lower connecting tube, characterized in that: the inner walls of the upper connecting tube and the lower connecting tube are fixedly connected with an inner sealing sleeve, the inner wall of the inner sealing sleeve is slidably connected with a fixing tube, the top and bottom of the fixing tube are both provided with a plurality of inner clamping holes, the outer walls of the upper connecting tube and the lower connecting tube are fixedly connected with filling blocks corresponding to the inner clamping holes, the filling blocks are provided with outer clamping holes connected with the inner clamping holes, the inner clamping holes and the filling blocks are connected by an adjusting plate, the connection between the upper connecting tube and the lower connecting tube is fixedly connected with a fixing ring, the fixing rings are clamped and connected with a docking ring, the inner wall of the docking ring is fixedly connected with an inner sealing annular plate matching the inner walls of the upper connecting tube and the lower connecting tube, and the outer wall of the docking ring is fixedly connected with an outer sealing annular plate matching the outer wall of the fixing ring.

[0007] Wherein, a sealing gasket is fixedly connected at the connection between the adjustment plate and the filling block, and the outer wall of the fixed tube fits with the inside of the inner sealing sleeve.

[0008] Among them, a clearance groove matching the docking ring is opened on the top of the fixing ring, a plurality of limit blocks are fixedly connected to the inner wall of the clearance groove, and a plurality of limit grooves corresponding to the limit blocks are opened on the top and bottom of the docking ring.

[0009] Wherein, the docking ring and the outer sealing annular plate are connected via a connecting ring, and the connecting ring and the outer sealing annular plate are matched with the upper connecting pipe and the lower connecting pipe.

[0010] Wherein, the outer wall of the outer sealing annular plate is sleeved with four arc-shaped plates, and a connecting block is fixedly connected to the connection between two of the arc-shaped plates, and the connecting blocks are connected by screws.

[0011] The beneficial effects of the utility model are as follows: the inner sealing sleeve and the fixed tube are connected and sealed, and the matching docking ring, the inner sealing annular plate and the outer sealing annular plate form an "I" shape, so that the sealing of the connection between the upper connecting tube and the lower connecting tube is guaranteed, and at the same time, the two ends of the fixed tube are in the upper connecting tube and the lower connecting tube, and are connected and fixed by the clamping rod between the inner clamping hole and the outer clamping hole, so that the device can ensure the sealing of the connection between the upper connecting tube and the lower connecting tube, and can reduce the influence of the vibration of the upper connecting tube and the lower connecting tube, thereby ensuring the stability of the connection between the upper connecting tube and the lower connecting tube.

[0012] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2It is a schematic diagram of the cross-sectional structure of the lower connecting pipe in the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the docking ring in the utility model;

[0016] Figure 4 It is a three-dimensional structural schematic diagram of the middle and lower connecting pipes of the utility model.

[0017] In the figure: 1, upper connecting tube; 11, lower connecting tube; 12, inner sealing sleeve; 13, fixed tube; 14, inner clamping hole; 141, outer clamping hole; 142, filling block; 15, clamping rod; 16, adjustment plate; 161, sealing gasket; 2, fixing ring; 21, clearance groove; 22, limiting block; 3, docking ring; 31, inner sealing annular plate; 32, connecting ring; 33, outer sealing annular plate; 34, limiting groove; 35, arc plate; 36, connecting block. DETAILED DESCRIPTION

[0018] See also Figures 1-4 The utility model provides the following technical scheme: it comprises an upper connecting tube 1 and a lower connecting tube 11, wherein the inner walls of the upper connecting tube 1 and the lower connecting tube 11 are fixedly connected with an inner sealing sleeve 12, the inner wall of the inner sealing sleeve 12 is slidably connected with a fixing tube 13, the top and the bottom of the fixing tube 13 are provided with a plurality of inner clamping holes 14, the outer walls of the upper connecting tube 1 and the lower connecting tube 11 are fixedly connected with filling blocks 142 corresponding to the inner clamping holes 14, the filling blocks 142 are provided with outer clamping holes 141 connected with the inner clamping holes 14, the inner clamping holes 14 and the filling blocks 142 are connected by an adjusting plate 16, a fixing ring 2 is fixedly connected with the connection between the upper connecting tube 1 and the lower connecting tube 11, a docking ring 3 is clamped and connected between the fixing rings 2, an inner sealing annular plate 31 matching the inner walls of the upper connecting tube 1 and the lower connecting tube 11 is fixedly connected with the inner wall of the docking ring 3, and an outer sealing annular plate 33 matching the outer wall of the fixing ring 2 is fixedly connected with the outer wall of the docking ring 3.

[0019] In this embodiment: the upper connecting tube 1 and the lower connecting tube 11 match each other, and the upper connecting tube 1 and the lower connecting tube 11 are used to transmit liquid. When the upper connecting tube 1 and the lower connecting tube 11 need to be connected and sealed, the inner sealing sleeve 12 fixedly connected to the inner wall of the upper connecting tube 1 and the lower connecting tube 11 can match the outer wall of the fixed tube 13, so that the inner wall of the inner sealing sleeve 12 can fit the outer wall of the fixed tube 13, so that the sealing between the inner sealing sleeve 12 and the fixed tube 13 is guaranteed, so that the upper connecting tube 1 and the lower connecting tube 11 can be connected to each other through the fixed tube 13, so that the liquid can be discharged from the upper connecting tube 1 to the lower connecting tube 11 through the fixed tube 13, and the fixed tube 13 can be connected to each other through the fixed tube 13. The plurality of inner card holes 14 opened on the outer walls of the top and bottom correspond to the plurality of outer card holes 141 opened on the outer walls of the upper connecting tube 1 and the lower connecting tube 11, so that the position of one end of the fixed tube 13 can correspond to the inner card hole 14 and the outer card hole 141, and then the inner card hole 14 and the outer card hole 141 are connected and fixed by the clamping rod 15, so that the top and bottom of the fixed tube 13 can effectively be connected and limited by the clamping rod 15 between the inner card hole 14 and the outer card hole 141, so that the position of the fixed tube 13 on the upper connecting tube 1 and the lower connecting tube 11 is supported and fixed, so that the position between the upper connecting tube 1 and the lower connecting tube 11 can be connected and fixed by the fixing tube 13, and when the liquid is connected in the upper connecting tube 1 and the lower connecting tube 11, the liquid flow rate is faster and the pressure is higher. When the upper connecting pipe 1 and the lower connecting pipe 11 are impacted by the water flow and vibrate, when the upper connecting pipe 1 and the lower connecting pipe 11 vibrate, the inner clamping hole 14 and the outer clamping hole 141 are respectively connected to the clamping rod 15 on the upper connecting pipe 1 and the lower connecting pipe 11, so that the clamping rod 15 can vibrate synchronously with the upper connecting pipe 1 and the lower connecting pipe 11, so that when the clamping rod 15 limits the two ends of the fixing pipe 13, the clamping rod 15 can be synchronized with the vibration of the upper connecting pipe 1 and the lower connecting pipe 11, preventing the upper connecting pipe 1 and the lower connecting pipe 11 from being connected and fixed through the connecting piece. When the upper connecting pipe 1 and the lower connecting pipe 11 vibrate, if the vibration frequency is different, the connection stability of the connecting piece will be greatly affected, so that the connection sealing of the device can be more stable. At the same time, the upper connecting pipe 1 and the lower connecting pipe 11 are connected. The fixing ring 2 fixedly connected at the joint of the pipe 1 and the lower connecting pipe 11 can be snap-fitted and installed on the docking ring 3 through the opening of the make way groove 21. The inner sealing annular plate 31 fixedly connected on the docking ring 3 is supported on the inner walls of the upper connecting pipe 1 and the lower connecting pipe 11, thereby increasing the sealing performance of the docking ring 3 between the upper connecting pipe 1 and the lower connecting pipe 11. The outer sealing annular plate 33 is located on the outer wall of the fixing ring 2, so that the docking ring 3, the inner sealing annular plate 31 and the outer sealing annular plate 33 form an "I" shape, so that the connection between the upper connecting pipe 1 and the lower connecting pipe 11 is sealed by the fixing pipe 13 and the inner sealing sleeve 12, while the upper connecting pipe 1 and the lower connecting pipe 11 are sealed by the docking ring 3, the inner sealing annular plate 31 and the outer sealing annular plate 33, thereby ensuring the sealing performance.Thus, the device can ensure the sealing of the connection between the upper connecting pipe 1 and the lower connecting pipe 11, while reducing the impact of vibration of the upper connecting pipe 1 and the lower connecting pipe 11, and ensuring the stability of the connection between the upper connecting pipe 1 and the lower connecting pipe 11.

[0020] A sealing gasket 161 is fixedly connected at the connection between the adjustment plate 16 and the filling block 142, and the outer wall of the fixed tube 13 fits with the inside of the inner sealing sleeve 12; the sealing gasket 161 fixedly connected at the connection between the adjustment plate 16 and the filling block 142 can enable the clamping rod 15 to seal the outer clamping hole 141 at the same time after being connected to the inner clamping hole 14 and the outer clamping hole 141, thereby ensuring the sealing of the device.

[0021] A clearance groove 21 matching the docking ring 3 is provided at the top of the fixing ring 2, and a plurality of limit blocks 22 are fixedly connected to the inner wall of the clearance groove 21. A plurality of limit grooves 34 corresponding to the limit blocks 22 are provided at the top and bottom of the docking ring 3; the clearance groove 21 provided at the top of the fixing ring 2 is used for limiting the connection of the docking ring 3, increasing the contact area between the docking ring 3 and the upper connecting pipe 1, the lower connecting pipe 11 and the clearance groove 21, thereby ensuring the sealing after the connection.

[0022] The docking ring 3 and the outer sealing annular plate 33 are connected by a connecting ring 32, and the connecting ring 32 and the outer sealing annular plate 33 match the upper connecting tube 1 and the lower connecting tube 11; the docking ring 3 and the outer sealing annular plate 33 are connected by a connecting ring 32, and the connecting ring 32 is used to be supported at the top position of the fixing ring 2, and the connecting ring 32 and the outer sealing annular plate 33 match the upper connecting tube 1 and the lower connecting tube 11, so that the inner sealing annular plate 31 and the outer sealing annular plate 33 can ensure the sealing of the connection between the upper connecting tube 1 and the lower connecting tube 11.

[0023] Four arc plates 35 are sleeved on the outer wall of the outer sealing annular plate 33, and a connecting block 36 is fixedly connected to the connection between two arc plates 35, and the connecting blocks 36 are connected by screws; the arc plates 35 sleeved on the outer wall of the outer sealing annular plate 33 are used to support and restrain the outer sealing annular plate 33 on the outer walls of the upper connecting pipe 1 and the lower connecting pipe 11, so that the sealing performance of the device can be guaranteed in multiple layers. After the arc plates 35 correspond to each other through the connecting blocks 36, the arc plates 35 are fixedly connected to each other by screws, so that the arc plates 35 are restrained to the position of the outer sealing annular plate 33.

[0024] The working principle and use process of the utility model are as follows: the inner sealing sleeve 12 fixedly connected to the inner wall of the upper connecting tube 1 and the lower connecting tube 11 matches the outer wall of the fixed tube 13, and the multiple inner clamping holes 14 opened on the outer wall of the top and bottom of the fixed tube 13 correspond to the multiple outer clamping holes 141 opened on the outer wall of the upper connecting tube 1 and the lower connecting tube 11, so that the top and bottom of the fixed tube 13 can effectively connect and limit the inner clamping holes 14 and the outer clamping holes 141 through the clamping rod 15. When the upper connecting tube 1 and the lower connecting tube 11 are impacted by the water flow and vibrate, the clamping rod 15 can be synchronized with the vibration of the upper connecting tube 1 and the lower connecting tube 11 to prevent the upper connecting tube 1 and the lower connecting tube 11 from being connected and fixed through the connecting piece. At the same time, the upper connecting tube 1 and The fixing ring 2 fixedly connected at the joint of the lower connecting tube 11 can be snap-fitted and installed with the docking ring 3 through the opening of the make way groove 21, so that the docking ring 3, the inner sealing annular plate 31 and the outer sealing annular plate 33 form an "I" shape, so that the connection between the upper connecting tube 1 and the lower connecting tube 11 is sealed by the fixing tube 13 and the inner sealing sleeve 12, while the upper connecting tube 1 and the lower connecting tube 11 are sealed by the docking ring 3, the inner sealing annular plate 31 and the outer sealing annular plate 33 to ensure the sealing. Therefore, the device can ensure the sealing of the connection between the upper connecting tube 1 and the lower connecting tube 11 while reducing the influence of the vibration of the upper connecting tube 1 and the lower connecting tube 11, thereby ensuring the stability of the connection between the upper connecting tube 1 and the lower connecting tube 11.

Claims

1. An oil drilling and production wellhead fracturing device, comprising an upper connecting pipe (1) and a lower connecting pipe (11), characterized in that: The inner walls of the upper connecting tube (1) and the lower connecting tube (11) are fixedly connected with an inner sealing sleeve (12), the inner wall of the inner sealing sleeve (12) is slidably connected with a fixing tube (13), the top and bottom of the fixing tube (13) are both provided with a plurality of inner clamping holes (14), the outer walls of the upper connecting tube (1) and the lower connecting tube (11) are fixedly connected with a filling block (142) corresponding to the inner clamping hole (14), the filling block (142) is provided with an outer clamping hole (141) connected with the inner clamping hole (14), the inner clamping hole (14) and the filling block (142) are connected by a clamping rod (15), one end of the clamping rod (15) is fixedly connected to an adjustment plate (16), a fixing ring (2) is fixedly connected at the connection between the upper connecting tube (1) and the lower connecting tube (11), a docking ring (3) is snap-connected between the fixing rings (2), an inner sealing annular plate (31) matching the inner walls of the upper connecting tube (1) and the lower connecting tube (11) is fixedly connected to the inner wall of the docking ring (3), and an outer sealing annular plate (33) matching the outer wall of the fixing ring (2) is fixedly connected to the outer wall of the docking ring (3).

2. The hydraulic fracturing device for an oil drilling and production wellhead according to claim 1, characterized in that: A sealing gasket (161) is fixedly connected at the connection between the adjustment plate (16) and the filling block (142), and the outer wall of the fixed tube (13) fits the inside of the inner sealing sleeve (12).

3. The hydraulic fracturing device for an oil drilling and production wellhead according to claim 1, characterized in that: The top of the fixing ring (2) is provided with a clearance groove (21) matching the docking ring (3); the inner wall of the clearance groove (21) is fixedly connected with a plurality of limit blocks (22); the top and bottom of the docking ring (3) are provided with a plurality of limit grooves (34) corresponding to the limit blocks (22).

4. A wellhead fracturing device for oil drilling and production according to claim 1, characterized in that: The docking ring (3) and the outer sealing annular plate (33) are connected via a connecting ring (32), and the connecting ring (32) and the outer sealing annular plate (33) match the upper connecting pipe (1) and the lower connecting pipe (11).

5. The hydraulic fracturing device for an oil drilling and production wellhead according to claim 1, wherein: The outer wall of the outer sealing annular plate (33) is sleeved with four arc-shaped plates (35), and a connecting block (36) is fixedly connected at the connection point of two of the arc-shaped plates (35), and the connecting blocks (36) are connected by screws.

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