Coiled tubing jar

Abstract

The present invention discloses a continuous tubing jar, comprising a connecting tube, wherein one side of the connecting tube is threadedly connected to a pressure tube, the other side of the pressure tube is threadedly connected to a spline tube, the interior of the connecting tube is threadedly connected to a punching tube, the interior of the pressure tube is slidably connected to a spline shaft, two groups of pistons and sealing rings are oppositely connected at both ends of the outer side of the spline shaft, a plurality of connecting plates are fixedly connected at equal distances to one side of the inner wall of the sealing ring, and a piston is fixedly connected to the end of the connecting plate away from the sealing ring, and wireless liquid sensors are bolted to both sides of the connecting plate. The present invention uses a micro-oil pump and oil pipe inside the sealing ring, and after the piston oil leaks, the oil pump can be used to re-pump the leaked hydraulic oil into the cavity, actively processing the leaked hydraulic oil and avoiding the situation where the device cannot be used after the hydraulic oil is lost.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum machinery downhole tools, in particular to a coiled tubing jar. Background Art

[0002] Coiled tubing was first used during World War II and became a fully operational technology in the oil industry in 1962. While still in its exploratory stages during the 1960s and 1970s, improvements in steel quality, significant innovations in coiled tubing manufacturing processes, and the continuous improvement of coiled tubing equipment performance in the 1980s led to fundamental improvements in its performance. Today, coiled tubing technology is widely used in various oil exploration fields abroad.

[0003] Patent No. CN202110035642.5 discloses a hydraulic bidirectional jar for continuous oil tubing, including a lower joint, a conversion joint, a hydraulic cylinder, a grease cylinder, a cylinder head, an upper joint, a core shaft, a jar piston, a cap, a locking screw, a connecting short section, a lower piston, an upper piston, a seal, an O-type seal, a dust ring, an O-type seal, a metal sealing assembly, and an oil filling hole. The lower joint, the conversion joint 2, the hydraulic cylinder, the grease cylinder, and the cylinder head are connected as one body to form the outer shell part, the core shaft, the jar piston 8, the cap, the connecting short section, and the upper joint are connected as one body to form the core shaft part. The jar piston realizes full metal sealing. When striking down or up, the hydraulic oil can only pass through the throttle hole. The hydraulic oil chamber is designed with a lower piston, and the lower part of the grease chamber is provided with an upper piston, which effectively balances the pulse pressure caused by the jarring and improves the reliability of the product.

[0004] At present, the existing coiled tubing jars still have some shortcomings. For example, although the existing coiled tubing jars use a jar piston to achieve full metal sealing, which improves the sealing performance of the piston, the metal piston will be affected by corrosion and other conditions after long-term use, and the problem of piston hydraulic oil leakage will still exist. It is impossible to actively solve the problem of piston hydraulic oil leakage. Therefore, a coiled tubing jar is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a coiled tubing jar that solves the problems raised in the background art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a coiled tubing jar, comprising a connecting tube, a pressure tube being threadedly connected to one side of the connecting tube, a spline tube being threadedly connected to one side of the pressure tube, a punching tube being threadedly connected to the interior of the connecting tube, a spline shaft being slidably connected to the interior of the pressure tube, two sets of pistons and sealing rings being oppositely connected to the outer ends of the spline shaft, a plurality of connecting plates being equidistantly fixedly connected to one side of the inner wall of the sealing ring, a piston being fixedly connected to the end of the connecting plate away from the sealing ring, and wireless liquid sensors being bolted to both sides of the connecting plate;

[0007] Circular holes are provided on the front and rear sides and the upper and lower sides of the sealing ring, and the inner walls of the circular holes are sealedly connected to a micro oil pump. Oil pipes are connected to both sides of the micro oil pump.

[0008] As an optional solution of the technical solution of the present application, the other side of the inner wall of the sealing ring is fixedly connected to oil-swelling rubber.

[0009] As an optional solution of the technical solution of the present application, a spline cylinder short section is fixedly connected to one end inside the spline cylinder.

[0010] As an optional solution of the technical solution of the present application, an oil filling hole plug is fixedly connected to the inner wall of the spline cylinder.

[0011] As an optional solution of the technical solution of the present application, an upper joint is threadedly connected to one side of the connecting tube.

[0012] As an optional solution of the technical solution of this application, the spline cylinder is threadedly connected to a lower joint on one side.

[0013] As an optional solution of the technical solution of the present application, a spiral capillary oil unloading groove is provided on the end surface of the sealing ring on the side in contact with the piston.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention uses a wireless liquid sensor on the connecting plate to detect the hydraulic oil. When there is a hydraulic oil leakage problem in the piston, the wireless liquid sensor will detect the hydraulic oil and use the wireless liquid sensor to send a signal to the outside to remind the outside staff that there is a leakage problem in the piston and sealing ring, reminding the staff to deal with it in time.

[0016] 2. The present invention uses the micro oil pump and oil pipe in the sealing ring. After the piston oil leaks, the leaked hydraulic oil can be re-pumped into the cavity by the oil pump, actively processing the leaked hydraulic oil, and avoiding the situation where the device cannot be used after the hydraulic oil is lost.

[0017] 3. The present invention uses the oil-swelling rubber between the sealing ring and the piston. After the oil-swelling rubber contacts the hydraulic oil, it can rapidly expand, thereby improving the sealing effect of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 This is an overall view of the coiled tubing jar of the present invention;

[0020] Figure 2 This is a view of the piston and sealing ring of the coiled tubing jar of the present invention.

[0021] In the figure: 1, upper joint 2, connecting cylinder 3, flushing pipe 4, sealing ring 5, piston 6, spline shaft 7, pressure cylinder 8, spline cylinder 9, oil filling hole plug 10, spline cylinder short section 11, lower joint 12, oil-swelling rubber 13, connecting plate 14, wireless liquid sensor 15, round hole 16, micro oil pump 17, oil pipe. DETAILED DESCRIPTION

[0022] See also Figure 1-2 The present invention provides a technical solution: a coiled tubing jar, comprising a connecting tube 2, one side of the connecting tube 2 being threadedly connected to a pressure tube 7, one side of the pressure tube 7 being threadedly connected to a spline tube 8, a punching tube 3 being threadedly connected inside the connecting tube 2, a spline shaft 8 being slidably connected inside the pressure tube 7, two sets of pistons 5 and sealing rings 4 being oppositely connected at both ends of the outer side of the spline shaft 8, a plurality of connecting plates 13 being fixedly connected at equal intervals to one side of the inner wall of the sealing ring 4, and a piston 5 being fixedly connected to the end of the connecting plate 13 away from the sealing ring 4;

[0023] When the upper piston 5 moves slowly away from the sealing surface of the pressure cylinder 7, the working chamber is connected again, and the lower hydraulic oil can be quickly relieved. At this time, the outer working cylinder loses resistance and moves upward. The spline shaft short section 10 moves upward rapidly with the external working cylinder, and the internal step of the short section quickly hits the load-bearing end surface of the spline shaft 6, forming an upward shock to the lower tool. When a downward shock is required, the pipe string is pressed down, and the piston 5 starts to move upward relative to the pressure cylinder 7. The above working process is carried out in reverse. After the sealing surface of the lower piston is separated from the working surface of the pressure cylinder 7, the external working cylinder moves downward rapidly, and the spline shaft short section 10 quickly hits the lower joint 11, forming a downward shock to the lower tool.

[0024] The wireless liquid sensor 14 is bolted to both sides of the connecting plate 13;

[0025] In this technical solution, when there is a hydraulic oil leakage problem in the piston 5, the wireless liquid sensor 14 will detect the hydraulic oil, and then use the wireless liquid sensor 14 to send a signal to the outside, reminding the external staff that there is a leakage problem in the piston 5 and the sealing ring 4, and reminding the staff to deal with it in time.

[0026] Circular holes 15 are formed on both the front and rear sides and the upper and lower sides of the sealing ring 4 , and a micro oil pump 16 is sealedly connected to the inner wall of the circular hole 15 . Oil pipes 17 are connected to both sides of the micro oil pump 16 .

[0027] In this technical solution, through the micro oil pump 16 and oil pipe 17 in the sealing ring 4, after the piston 5 leaks oil, the leaked hydraulic oil can be re-pumped into the cavity by using the oil pump, actively processing the leaked hydraulic oil, and avoiding the situation where the device cannot be used after the hydraulic oil is lost.

[0028] In some technical solutions, an oil-swellable rubber 12 is fixedly connected to the other side of the inner wall of the sealing ring 4 .

[0029] In this technical solution, the oil-swellable rubber 12 between the sealing ring 4 and the piston 5 can rapidly expand when it contacts the hydraulic oil, thereby improving the sealing effect of the hydraulic oil.

[0030] In some technical solutions, a spline cylinder short section 10 is fixedly connected to one end of the spline cylinder 8 .

[0031] In some technical solutions, an oil filling hole plug 9 is fixedly connected to the inner wall of the spline cylinder 8.

[0032] In some technical solutions, one side of the connecting tube 2 is threadedly connected to the upper joint 1.

[0033] In some technical solutions, one side of the spline cylinder 8 is threadedly connected to a lower joint 11 .

[0034] In some technical solutions, a spiral capillary oil unloading groove is provided on the end surface of the sealing ring 4 on the side in contact with the piston 5.

Claims

1. A coiled tubing jar, comprising a connecting tube (2), characterized in that: One side of the connecting cylinder (2) is threadedly connected to a pressure cylinder (7), and one side of the pressure cylinder (7) is threadedly connected to a spline cylinder (8). The interior of the connecting cylinder (2) is threadedly connected to a flushing pipe (3), and the interior of the pressure cylinder (7) is slidably connected to a spline shaft (6). Two groups of pistons (5) and sealing rings (4) are oppositely connected at both ends of the outer side of the spline shaft (6). A plurality of connecting plates (13) are fixedly connected at equal distances to one side of the inner wall of the sealing ring (4), and the end of the connecting plate (13) away from the sealing ring (4) is fixedly connected to the piston (5). Both sides of the connecting plate (13) are bolted to wireless liquid sensors (14); Circular holes (15) are provided on both the front and rear sides and the upper and lower sides of the sealing ring (4), and the inner wall of the circular hole (15) is sealedly connected to a micro oil pump (16), and both sides of the micro oil pump (16) are connected to oil pipes (17); The other side of the inner wall of the sealing ring (4) is fixedly connected to an oil-expanding rubber (12), and the end surface of the sealing ring (4) in contact with the piston (5) is provided with a spiral capillary oil unloading groove.

2. The coiled tubing jar according to claim 1, characterized in that: One end of the interior of the spline cylinder (8) is fixedly connected to a spline cylinder short section (10).

3. The coiled tubing jar according to claim 1, characterized in that: An oil filling hole plug (9) is fixedly connected to the inner wall of the spline cylinder (8).

4. The coiled tubing jar according to claim 1, characterized in that: One side of the connecting tube (2) is threadedly connected to an upper joint (1).

5. The coiled tubing jar according to claim 1, characterized in that: One side of the spline cylinder (8) is threadedly connected to a lower joint (11).

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