A double-insulated, double-weak-point integrated faucet

Abstract

The present invention relates to a double-insulated double-weak-point integrated horse head, comprising a long torpedo assembly, an overshot tube, a piston rod, a piston sleeve, a wire protection rubber sleeve, a limit sleeve, a double-weak-point assembly, a sealed short connector assembly, and a 31-core plug module; the long torpedo assembly comprises a torpedo spring, a long overshot torpedo, and a three-cone sleeve; the front end of the long overshot torpedo is connected to the torpedo spring, the rear end is fixedly connected to the three-cone sleeve, and the overshot tube is sleeved on the outside of the long overshot torpedo; one end of the piston rod is fixedly connected to the long overshot torpedo through a thread, the three-cone sleeve is fixed to the piston rod, the piston rod is fixed with a piston sleeve on the outside, and the piston sleeve divides the piston rod and the overshot tube into two chambers; the overshot tube is fixedly connected with a limit sleeve, and the limit sleeve is arranged between the piston rod and the sealed short connector. The advantage is that the horse head greatly reduces the work of disassembling, inspecting, and replacing the tension rod.

Description

Technical Field

[0001] The invention belongs to the field of petroleum well logging, and in particular relates to a double-insulated double-weak-point integrated faucet. Background Art

[0002] In oil exploration and logging, a malachite plug is needed to connect the logging cable to the logging instrument. When the logging instrument is blocked underground and the pulling force is close to the upper limit of the safe use of the logging cable, the tension rod inside the malachite plug can be broken in time to protect the logging cable from being disconnected from the logging instrument and safely brought up to the well; the malachite plug is equipped with a through wire connecting the cable core and the instrument, which can ensure good signal connection and insulation requirements in the high temperature and high pressure underground environment, so that the underground instrument can be powered normally and transmit logging signals to the equipment on the ground.

[0003] As the depth of oil well mining increases, the underground working conditions become more and more complex and harsh, and the design requirements for logging bridles are also increasing. Most of the bridles currently used are insulated by filling with silicone grease, which is in a paste form. When filling, it is easy to form cavities inside the bridle that cannot be filled. During oil well testing, the cavity is compressed to disappear under the action of underground pressure, which is very likely to cause mud intrusion, thereby reducing insulation. In addition, the sealing plug is installed by welding wire, and the sealing plug needs to be re-welded during installation and maintenance. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a double-insulated double-weak-point integrated faucet for connecting a logging cable with a logging instrument in petroleum logging to protect the safety of the logging cable.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A double-insulated double-weak-point integrated malachite head, comprising a long torpedo assembly, a salvage tube, a piston rod, a piston sleeve, a wire protection rubber sleeve, a limit sleeve, a double-weak-point assembly, a sealed short connector assembly, and a 31-core plug module;

[0007] The long torpedo assembly includes a torpedo spring, a long torpedo over the line, and a three-cone sleeve. The front end of the long torpedo over the line is connected to the torpedo spring, the rear end is fixedly connected to the three-cone sleeve, and the overshot tube is sleeved on the outside of the long torpedo over the line.

[0008] One end of the piston rod is fixedly connected to the long torpedo through a thread, and a cavity is formed at the fixed connection. A three-cone sleeve is built in the cavity. The three-cone sleeve is fixed to the piston rod by screws to prevent the three-cone sleeve and the piston rod from rotating relative to each other. A piston sleeve is fixed to the outside of the piston rod, and the piston sleeve divides the piston rod and the salvage tube into two chambers; a limit sleeve is fixedly connected inside the salvage tube, and the limit sleeve is arranged between the piston rod and the sealing short connector. The cavity in the piston rod is connected to the inner cavity of the limit sleeve through a wire hole. The wire holes are evenly distributed on the piston rod along the circumference, and a wire protection rubber sleeve is fixed to the inner wall of the wire hole;

[0009] The double weak point assembly includes a cylindrical pin, a tension sleeve, a fixed upper sleeve, a fixed lower sleeve, a tension rod, and an insulating pad. The fixed upper sleeve is connected to the other end of the piston rod through a cylindrical pin. The fixed upper sleeve and the fixed lower sleeve are limitedly connected by a limit pin to prevent the fixed upper sleeve and the fixed lower sleeve from radially rotating. The tension rod is fixed in the fixed upper sleeve and the fixed lower sleeve. An insulating pad is provided between the tension rod and the sealed short connector; the tension sleeve is sleeved on the outside of the fixed upper sleeve and the fixed lower sleeve;

[0010] The sealing short connector assembly includes a sealing short connector, a guide rod, and a check ring. The interior of one end of the sealing short connector is threadedly connected to the fixed lower sleeve, and the exterior is threadedly connected to the salvage tube. The other end of the sealing short connector is connected to the wire protector. The sealing short connector is radially evenly distributed with sealing positioning holes; the guide rod is plugged into the sealing short connector and limited by the check ring, and the bottom end of the guide rod is plugged into the wire tube; a 31-core plug module is connected inside the sealing short connector.

[0011] The 31-core plug module includes a wire barrel, a female pin sleeve, a plug, and an extended sealing plug. The wire barrel is arranged in a sealed short connector and fixedly connected to the sealed short connector. A positioning hole is radially opened on the wire barrel. The extended sealing plug is connected to the female pin sleeve through the sealing short connector and the positioning holes of the wire barrel. The rubber-tail copper plug is plugged into the sealed positioning hole of the sealed short connector and is located in the same straight line as the extended sealing plug. The plug is arranged in the sealed short connector and fixedly connected to the wire barrel.

[0012] The interiors of the two chambers are filled with silicone oil and silicone grease respectively.

[0013] A wire pressing plate is provided at the end of the wire passing hole, and the wire pressing plate is fixedly connected to the piston rod by screws.

[0014] An anti-dropping clamp ring is arranged between the cylindrical pin and the fixed upper sleeve.

[0015] The tension rod is threadedly connected to the fixed lower sleeve, the fixed lower sleeve is threadedly connected and fixed to the tension sleeve, the fixed upper sleeve is threadedly connected and fixed to the tension rod, and the lower sleeve is axially locked and fixed after connection.

[0016] The tension sleeve is fixed to the lower fixing sleeve by threaded connection. An inner stop is arranged in the tension sleeve. The tension sleeve is connected to the upper fixing sleeve by the inner stop to limit the axial position of the upper fixing sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adopts double insulation and double weak point design, which greatly reduces the work of disassembly inspection and replacement of tension rods, and realizes the "maintenance-free" use of the instrument. The specific advantages are:

[0019] 1) The piston sleeve and wire protection rubber sleeve form a sealed cavity, which makes the faucet have double insulation of silicone grease and silicone oil. It improves the insulation degree of the faucet and makes it safer and more reliable to use.

[0020] 2) The double weak point assembly is used to avoid the logging instrument falling into the well due to fatigue fracture of the tension rod. The double weak point also ensures the safe separation of the cable from the logging instrument when the cable tension is overloaded.

[0021] 3) After removing the cylindrical pin between the long torpedo assembly and the fixing sleeve, the long torpedo assembly can be completely separated from the faucet without affecting the connection between the cable and the long torpedo assembly. The long torpedo assembly connected and fixed to the logging cable is suitable for the detection and marking of the logging cable just like the ordinary torpedo, which truly realizes the integrated design of the torpedo and the faucet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 yes Figure 1 Section view along line AA.

[0024] Figure 3 yes Figure 2 Section view along line BB.

[0025] Figure 4 yes Figure 2 Enlarged view of part I.

[0026] Figure 5 It is a connection diagram of a double weak point assembly and a sealed short connector assembly.

[0027] Figure 6 It is a structural diagram of a tension sleeve.

[0028] Figure 7 This is a diagram of the logging cable passing through the three-cone sleeve.

[0029] In the figure: torpedo spring 1, salvage tube 2, long torpedo through the line 3, three-cone sleeve 4, screws 5-7, piston rod 8, piston sleeve 9, screws 10, baffles and sealing rings 11-14, wire protection rubber sleeve 15, limit sleeve 16, oil plug 17, O-ring 18, extended sealing plug 19, wire pressing plate 20, screw 21, cylindrical pin 22, anti-drop clamping ring 23, tension sleeve 24, fixed upper sleeve 25, limit pin 26, fixed lower sleeve 27, tension rod 28, insulating pad 29, guide rod 30, check ring 31, O-ring 32-33, sealed short connector 34, wire barrel 35, female pin sleeve 36, screw 37, plug 38, O-ring 39-40, wire protection 41, rubber tail copper plug 42, positioning stopper plane 43, outer sleeve 401, middle sleeve 402, inner sleeve 403. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0031] See Figure 1-Figure 4 , a double-insulated double-weak-point integrated horse head, including a long torpedo assembly, a salvage tube 2, a piston rod 8, a piston sleeve 9, a wire protection rubber sleeve 15, a limit sleeve 16, a double-weak-point assembly, a sealed short connector assembly, and a 31-core plug module;

[0032] The long torpedo assembly includes a torpedo spring 1, a long torpedo 3, and a three-cone sleeve 4. The front end of the long torpedo 3 is provided with a groove for connecting with the torpedo spring 1. The tail end of the long torpedo 3 is connected with the three-cone sleeve 4. The overshot tube 2 is sleeved on the outside of the long torpedo 3. During normal transportation or downhole testing, the faucet will be bent relative to the cable. The head of the faucet, i.e., the root of the cable, is most susceptible to damage. The torpedo spring 1 is provided to provide a bending force on the logging cable to protect the logging cable.

[0033] A cavity is provided in the piston rod 8, one end of the piston rod 8 is fixedly connected to the over-line torpedo 3 by a thread, the three-cone sleeve 4 is placed in the cavity between the over-line torpedo 3 and the piston rod 8, the screw 5 is installed in the threaded hole of the piston rod 8 and penetrates into the notch of the three-cone sleeve 4 to prevent the three-cone sleeve 4 from rotating; a piston sleeve 9 is fixed to the outside of the piston rod 8, and the piston sleeve 9 divides the space between the piston rod 8 and the overshot tube 2 into two chambers, and the interiors of the two chambers are filled with silicone oil and silicone grease respectively. Figure 2 In the figure, the chamber on the left side of the piston sleeve 9 is filled with silicone grease, and the chamber on the right side is filled with silicone oil, which plays a double insulation protection function at the connection point of the logging cable core. A limit sleeve 16 is fixedly connected inside the salvage tube 2. The limit sleeve 16 is arranged between the piston rod 8 and the sealing short connector 34. The cavity inside the piston rod 8 is connected to the inner cavity of the limit sleeve 16 through a wire hole. The wire holes are evenly distributed on the piston rod 8 along the circumference. A wire protection rubber sleeve 15 is fixed on the inner wall of the wire hole; the wire hole is a conical hole, which cooperates with the conical wire protection rubber sleeve 15. When pressed, the wire protection rubber sleeve 15 is deformed to play a sealing role. The wire protection rubber sleeve 15 is pressed and fixed by the wire pressing plate 20 and the screw 21. After the logging cable core passes through the inner hole of the three-cone sleeve 4, it passes through the wire protection rubber sleeve 15 with a single line and is connected to the rubber tail copper plug 42; the cavity is filled with silicone grease, which plays a role in blocking mud and instrument insulation. The built-in three-cone sleeve of the faucet is directly connected to the logging cable, omitting the structure that the ordinary faucet needs to be connected to the logging torpedo, and realizing the integration of the torpedo and the faucet (in conventional use, the torpedo is connected to the logging cable, and the torpedo is then connected to the faucet).

[0034] See Figure 7The internal three-cone sleeve 4 is used to clamp the high-strength steel wire on the outer periphery of the logging cable. The three-cone sleeve 4 is composed of a three-layer structure of an outer sleeve 401, a middle sleeve 402, and an inner sleeve 403. During installation, the outer steel wire of the logging cable passes between the outer sleeve 401 and the middle sleeve 402 of the three-cone sleeve 4, the inner steel wire of the logging cable passes between the middle sleeve 402 and the inner sleeve 403 of the three-cone sleeve 4, and the cable core of the logging cable passes through the middle through hole of the inner sleeve 403 of the three-cone sleeve 4 and then disperses and passes through the piston rod 8 in a single line. The wire protection rubber sleeve 15 and the wire pressing plate 20 realize the sealing function, and the logging cable core is finally connected to the rubber tail copper plug 42 to realize the output of the power supply and signal line.

[0035] See Figure 4 The piston sleeve 9 is sealed with the overshot tube 2 and the piston rod 8 through the baffle and the sealing ring 11-14, see Figure 2 The screw 7 and the piston limit sleeve 16 connected to the overshot tube 4 play the role of axial limiting the piston sleeve 9. A hole is opened on the piston rod 8 and connected and blocked with a screw 6. The threaded hole of the mounting screw 6 is used to inject silicone grease into the piston rod 8. The threaded hole on the outer surface of the overshot tube 2 is processed and sealed with an oil plug 17 and an O-ring 18, which are used to fill silicone oil and exhaust gas into the bridle. The piston rod 8 is threadedly connected to the over-line long torpedo 3 and is limited by a radial screw 10 to prevent the over-line long torpedo 3 and the piston rod 8 from rotating.

[0036] See Figure 2 , Figure 5 , Figure 6 The double weak point assembly includes a cylindrical pin 22, a tension sleeve 24, a fixed upper sleeve 25, a fixed lower sleeve 27, a tension rod 28, and an insulating pad 29. The fixed upper sleeve 25 is connected to the other end of the piston rod 8 through the cylindrical pin 22 and the anti-dropping collar 23. An anti-dropping collar 23 is provided between the cylindrical pin 22 and the fixed upper sleeve 25. The fixed upper sleeve 25 and the fixed lower sleeve 27 are limitedly connected by a limit pin 26 to prevent the two from rotating. The tension rod 28 is arranged in the fixed upper sleeve 25 and the fixed lower sleeve 27. The tension rod 28 passes through the fixed lower sleeve 27 and is connected to the fixed upper sleeve 25 by threads. An insulating pad 29 is provided between the tension rod 28 and the sealing short connector 34; the tension sleeve 24 is sleeved on the outside of the fixed upper sleeve 25 and the fixed lower sleeve 27, and the tension sleeve 24 can be connected to the fixed lower sleeve 27 by threads. The tension sleeve 24 and the fixed upper sleeve 25 maintain an axial distance of 10mm. When the tension rod 28 breaks and the tension sleeve 24 is not broken, the long torpedo assembly can drive the fixed upper sleeve 25 to move 10mm axially back and forth inside the faucet. The double weak point assembly is provided with two fracture weak points, namely the tension sleeve 24 and the tension rod 28. When the tension rod 28 breaks due to fatigue, the tension sleeve 24 ensures the normal operation of the faucet, realizes double weak point protection, and eliminates the maintenance work of frequently replacing the tension rod.

[0037] Specifically, the tension rod 28 is threadedly connected to the fixed lower sleeve 27, and the fixed lower sleeve 27 is threadedly connected and fixed to the tension sleeve 24. The fixed upper sleeve 25 is threadedly connected and fixed to the tension rod 28, and the fixed lower sleeve 27 is axially locked after connection. An anti-rotation limit pin 26 is arranged between the fixed upper sleeve 25 and the fixed lower sleeve 27, so that the fixed upper sleeve 25 and the fixed lower sleeve 27 can move relative to each other axially (when the tension rod is broken) but cannot move relative to each other radially. The fixed upper sleeve 25 and the piston rod 8 are relatively fixed by the cylindrical pin 22, while there is no connection between the tension rod 28 and the piston rod 8. The tension sleeve 24 and the lower fixed sleeve 27 are fixed by threaded connection. There is a positioning stop surface 43 in the tension sleeve to limit the axial position of the upper fixed sleeve 25. When the tension rod 28 is broken, the upper fixed sleeve 25 and the main body of the tension rod 28 are separated and axially displaced until the upper fixed sleeve 25 contacts the positioning stop surface 43 in the tension sleeve 24. If the tension on the logging cable is still greater than the load of the tension sleeve at this time, the tension sleeve will break. The logging cable drives the long torpedo, the piston rod 8 and the bridle to separate and rise to the well, protecting the cable from damage.

[0038] See Figure 2 , Figure 5 , Figure 7 The sealed short connector assembly includes a sealed short connector 34, a guide rod 30, and a check ring 31. The interior of one end of the sealed short connector 34 is threadedly connected to the fixed lower sleeve 25, and the exterior is threadedly connected to the salvage tube 2. An O-ring 33 is provided between the salvage tube 2 and the sealed short connector 34 for sealing. The other end of the sealed short connector 34 is connected to the protective wire 41, and the sealed short connector 34 and the protective wire 41 are sealed by O-rings 39-40. The sealed short connector 34 is radially uniformly provided with sealed positioning holes; the guide rod 30 is plugged into the sealed short connector 34 and sealed by an O-ring 32. The guide rod 30 is limited by the check ring 31, and the bottom end of the guide rod 30 is plugged into the wire barrel 35. The guide rod 30 and the check ring 31 limit the rotation of the double weak point assembly to prevent the logging cable core from being twisted off due to the relative rotation of the long torpedo assembly and the Malvern. The inner cavity of the sealed short connector 34 is connected with a 31-core plug module, which is positioned and fixed by a positioning key slot hole.

[0039] The 31-core plug module includes a wire barrel 35, a female pin sleeve 36, and a plug 38. The wire barrel 35 is arranged in the sealed short connector 34 and is fixedly connected to the sealed short connector 34. Positioning holes are evenly distributed radially on the wire barrel 35, and the end of the positioning hole is connected to the female pin sleeve 36. The extended sealing plug 19 is connected to the sealed short connector 34 through a thread. The extended sealing plug 19 is connected to the female pin sleeve 36 through the positioning holes of the sealed short connector 34 and the wire barrel 35 to achieve the conduction of the signal line; the extended sealing plug 19 adopts a plug-in connection without welding leads, which is simple and convenient to replace. The rubber-tail copper plug 42 is plugged into the sealed positioning hole of the sealed short connector 34 and is located in the same straight line as the extended sealing plug 19. The plug 38 is arranged in the sealed short connector 34 and is fixedly connected to the wire barrel 35. The wire barrel 35 is connected to the plug 38 by radially arranged screws 37; the female pin sleeve 36 and the plug 38 are connected by welding leads. Plug 38 is a 31-core plug, which consists of 31-core electrical parts and a wire barrel 35 with built-in wires. The extended sealing plug 19 installed on the sealed short connector 34 is connected to the female pin in the female pin sleeve in the wire barrel 35 to achieve the connection of power and signal lines.

[0040] The modular design of the 31-core plug eliminates the need to disconnect or weld the sealing plug during maintenance and repair of the faucet, and also eliminates the need to disconnect or weld the sealing plug when replacing the sealing plug, which not only reduces the maintenance workload, but also saves maintenance time, and increases equipment utilization. The integrated design eliminates the need to weld the sealing plug, and also avoids poor insulation caused by improper handling of the joints and leads, making the equipment safer and more reliable to use.

Claims

1. A double-insulated double-weakness integrated faucet, characterized in that: Including long torpedo assembly, salvage tube, piston rod, piston sleeve, wire protection rubber sleeve, limit sleeve, double weak point assembly, sealed short connector assembly, 31-core plug module; The long torpedo assembly includes a torpedo spring, a long torpedo over the line, and a three-cone sleeve. The front end of the long torpedo over the line is connected to the torpedo spring, the rear end is fixedly connected to the three-cone sleeve, and the overshot tube is sleeved on the outside of the long torpedo over the line. One end of the piston rod is fixedly connected to the long torpedo through a thread, and a cavity is formed at the fixed connection. A three-cone sleeve is built in the cavity. The three-cone sleeve is fixed to the piston rod by screws to prevent the three-cone sleeve and the piston rod from rotating relative to each other. A piston sleeve is fixed to the outside of the piston rod, and the piston sleeve divides the piston rod and the salvage tube into two chambers; a limit sleeve is fixedly connected inside the salvage tube, and the limit sleeve is arranged between the piston rod and the sealing short connector. The cavity in the piston rod is connected to the inner cavity of the limit sleeve through a wire hole. The wire holes are evenly distributed on the piston rod along the circumference, and a wire protection rubber sleeve is fixed to the inner wall of the wire hole; The double weak point assembly includes a cylindrical pin, a tension sleeve, a fixed upper sleeve, a fixed lower sleeve, a tension rod, and an insulating pad. The fixed upper sleeve is connected to the other end of the piston rod through a cylindrical pin. The fixed upper sleeve and the fixed lower sleeve are limitedly connected by a limit pin to prevent the fixed upper sleeve and the fixed lower sleeve from radially rotating. The tension rod is fixed in the fixed upper sleeve and the fixed lower sleeve. An insulating pad is provided between the tension rod and the sealed short connector; the tension sleeve is sleeved on the outside of the fixed upper sleeve and the fixed lower sleeve; The sealing short connector assembly includes a sealing short connector, a guide rod, and a check ring. The interior of one end of the sealing short connector is threadedly connected to the fixed lower sleeve, and the exterior is threadedly connected to the salvage tube. The other end of the sealing short connector is connected to the wire guard. The sealing short connector is radially evenly distributed with sealing positioning holes; the guide rod is plugged into the sealing short connector and limited by the check ring, and the bottom end of the guide rod is plugged into the wire barrel; the sealing short connector is connected with a 31-core plug module; The interiors of the two chambers are filled with silicone oil and silicone grease respectively; A wire pressing plate is provided at the end of the wire passing hole, and the wire pressing plate is fixedly connected to the piston rod by screws.

2. A double-insulated double-weak-point integrated faucet according to claim 1, characterized in that: The 31-core plug module includes a wire barrel, a female pin sleeve, a plug, and an extended sealing plug. The wire barrel is arranged in a sealed short connector and fixedly connected to the sealed short connector. A positioning hole is radially opened on the wire barrel. The extended sealing plug is connected to the female pin sleeve through the sealing short connector and the positioning holes of the wire barrel. The rubber-tail copper plug is plugged into the sealed positioning hole of the sealed short connector and is located in the same straight line as the extended sealing plug. The plug is arranged in the sealed short connector and fixedly connected to the wire barrel.

3. The double-insulated double-weak-point integrated faucet according to claim 1, characterized in that: An anti-dropping clamp ring is arranged between the cylindrical pin and the fixed upper sleeve.

4. The double-insulated double-weakness-point integrated faucet according to claim 1, characterized in that: The tension rod is threadedly connected to the fixed lower sleeve, the fixed lower sleeve is threadedly connected and fixed to the tension sleeve, the fixed upper sleeve is threadedly connected and fixed to the tension rod, and the lower sleeve is axially locked and fixed after connection.

5. The double-insulated double-weakness-point integrated faucet according to claim 1, characterized in that: The tension sleeve is fixed to the lower fixing sleeve by threaded connection. An inner stop is arranged in the tension sleeve. The tension sleeve is connected to the upper fixing sleeve by the inner stop to limit the axial position of the upper fixing sleeve.

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