Logging Bridle

Abstract

The invention discloses a logging bridle, which relates to the field of logging instruments. The bridle is provided with a pressure ring, a metal sleeve, a first soft sealing sleeve and a second soft sealing sleeve. The first soft sealing sleeve and the second soft sealing sleeve cooperate with silicone grease for sealing, and the sealing effect of the device is greatly improved, and the device can adapt to a high-pressure environment and is not easy to leak under a high-pressure environment. The metal sleeve is provided with an opening for the outer steel wire of the cable to reversely pass through. After the cable passes through the metal sleeve, the outer steel wire of the cable is reversely passed through and tightened, and is compacted by the pressure ring. With such a configuration, the cable connection is firm and the requirements on the material and hardness of the metal sleeve itself are low.

Description

Technical Field

[0001] The invention relates to the field of well logging instruments, in particular to a well logging bridle. Background Art

[0002] At present, bridles are mostly used for logging operations and other underground operations with low voltage or even no power supply for cables. They are mainly sealed with silicone grease and the outer steel wire of the cable is squeezed by the cone sleeve to achieve cable tension and load-bearing. Silicone seals have little effect on low-pressure operations. Under high-pressure conditions underground, wellbore liquids can easily penetrate into the bridle through the cable access port, causing a short circuit in the bridle's internal circuit and burning the instrument, which has a huge impact on high-voltage and high-power underground operations. In addition, the cone sleeve tensioning has very high requirements on the material and hardness of the cone sleeve.

[0003] Therefore, how to improve the sealing performance of the bridle so that it is not easy to leak under high pressure underground, and how to reduce the requirements of the bridle on the material and hardness of the cone sleeve have become urgent problems to be solved by technical personnel in this field. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a logging bridle, which has good sealing effect, is not easy to leak under the high-pressure environment underground, and reduces the requirements of the bridle on the material and hardness of the cone sleeve.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a logging bridle, comprising: a cylinder, wherein a first installation cavity, a silicone grease cavity and a second installation cavity which are connected in sequence are arranged inside the cylinder along an axial direction, a silicone grease hole which is connected to the silicone grease cavity is opened on the cylinder, and the silicone grease hole is used to inject silicone grease into the silicone grease cavity; a sealing component, comprising a first soft sealing sleeve and a second soft sealing sleeve, the first soft sealing sleeve being used to seal an end of the cylinder close to the first installation cavity, the second soft sealing sleeve being used to seal an end of the cylinder close to the second installation cavity, and both the first soft sealing sleeve and the second soft sealing sleeve being connected to the silicone grease cavity; an inlet cable nipple, which is arranged at an end of the cylinder close to the first installation cavity, is connected to the first soft sealing sleeve, and squeezes the first soft sealing sleeve so that the first soft sealing sleeve seals the end of the cylinder close to the first installation cavity; an outlet cable nipple, which is arranged at an end of the cylinder close to the second installation cavity, and is connected to the The second soft sealing sleeve is connected and squeezes the second soft sealing sleeve so that the second soft sealing sleeve seals the end of the cylinder body close to the second installation cavity; a pressure ring is arranged in the second installation cavity, is connected to the second soft sealing sleeve, and is arranged at the end of the second soft sealing sleeve away from the cable outlet short section; a metal sleeve is arranged in the second installation cavity, is arranged at the end of the pressure ring away from the second soft sealing sleeve, one end of which is connected to the silicone grease cavity and the other end is connected to the pressure ring, and the metal sleeve radially extends to form a flange, and the flange is circumferentially provided with a plurality of openings, after the cable passes through the cable inlet short section, the first soft sealing sleeve, the silicone grease cavity and the metal sleeve in sequence, the outer steel wire of the cable passes through the opening in the reverse direction, the cable core of the cable passes through the pressure ring, the second soft sealing sleeve and the cable outlet short section in sequence and extends out, and the pressure ring is pressed on the flange to compress the outer steel wire.

[0007] Preferably, the logging bridle also includes a locking cap and an instrument connector, a boss is provided at one end of the cable outlet short section away from the second soft sealing sleeve, the boss is embedded in the locking cap, a limiting step for limiting the axial movement of the boss is provided inside the locking cap, the end of the boss close to the cable outlet short section abuts against the limiting step, the end of the boss away from the cable outlet short section is recessed to form a groove, the cable core extends into the groove, the instrument connector is detachably connected to the locking cap, and the end of the instrument connector close to the locking cap extends into the groove, the instrument cable passes through the instrument connector and is connected to the cable core.

[0008] Preferably, a plurality of annular grooves are axially arranged on the outer peripheral side wall of one end of the instrument connector close to the locking cap, and a sealing ring is installed in one of the annular grooves, and the sealing ring is used to seal the gap between the outer peripheral side wall of one end of the instrument connector close to the locking cap and the inner side wall of the groove.

[0009] Preferably, a first external thread is provided on an outer peripheral side wall of the instrument connector, a first internal thread is provided on an inner peripheral side wall of one end of the locking cap close to the instrument connector, and the first external thread is threadably connected to the first internal thread.

[0010] Preferably, a second external thread is provided on the outer peripheral side wall of the cable inlet short section, and a second internal thread is provided on one end of the cylinder body close to the cable inlet short section, and the second external thread is threadably connected to the second internal thread.

[0011] Preferably, the inner diameter of the pressure ring is the same as the inner diameter of the flange, the outer diameter is the same as the outer diameter of the flange, and the pressure ring is coaxially arranged with the metal sleeve.

[0012] Preferably, the metal sleeve is a conical steel sleeve, the first soft sealing sleeve is a first conical soft sealing sleeve, the second soft sealing sleeve is a second conical soft sealing sleeve, the first conical soft sealing sleeve and the second conical soft sealing sleeve have the same orientation, the small ends of the first conical soft sealing sleeve and the metal sleeve are opposite, the first conical soft sealing sleeve is arranged in the first installation cavity, the outer wall of the first conical soft sealing sleeve is fitted with the inner wall of the first installation cavity, the large end of the second conical soft sealing sleeve is abutted against the end of the pressure ring away from the metal sleeve, the small end is embedded in the cable outlet short section and fits with the inner wall of the cable outlet short section, and the end of the metal sleeve close to the pressure ring radially extends to form the flange.

[0013] Preferably, the first soft sealing sleeve and the second soft sealing sleeve are both made of insulating rubber.

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

[0015] Compared with the simple use of silicone grease sealing, the logging bridle provided by the present invention adds a first soft sealing sleeve and a second soft sealing sleeve. During specific use, the first soft sealing sleeve and the second soft sealing sleeve respectively complete the sealing of the two ends of the cylinder under the extrusion of the inlet cable short section and the outlet cable short section, so that the sealing effect of the device is greatly improved, the sealing effect of the device is good, and it is not easy to leak under the high-pressure environment underground; compared with the use of a conical sleeve to extrude and tighten the cable, the logging bridle is provided with a pressure ring and a metal sleeve to replace the conical sleeve, and the metal sleeve is provided with an opening for the outer steel wire of the cable to reversely pass through. After the cable passes through the metal sleeve, the outer steel wire of the cable is reversed and tightened, and compacted by the pressure ring. With this arrangement, the cable connection is firm and the material and hardness requirements of the metal sleeve itself are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a well logging bridle provided in an embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of a metal sleeve of a well logging bridle provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the reverse threading method of the outer steel wire of the logging bridle cable provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of a well logging bridle pressure ring provided in an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection between the well logging bridle lock cap and the instrument connector provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Cable inlet nipple, 2. First soft sealing sleeve, 3. Silicone grease hole, 4. Second soft sealing sleeve, 5. Metal sleeve, 6. Pressure ring, 7. Locking cap, 8. Silicone grease cavity, 9. Cable core, 10. Cable outlet nipple, 11. Outer steel wire, 12. Opening, 13. Ring groove, 14. Instrument connector, 15. Flange, 16. Groove, 17. First external thread, 18. First internal thread, 19. First through hole, 20. Instrument cable, 21. Boss, 22. Limiting step. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide a logging bridle which has good sealing effect, is not easy to leak under the downhole high pressure environment, and has low requirements on the material and hardness of the cone sleeve.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-4 As shown, this embodiment provides a logging bridle, including: a cylinder, wherein a first installation cavity, a silicone grease cavity 8 and a second installation cavity which are connected in sequence are arranged inside the cylinder along the axial direction, a silicone grease hole 3 which is connected to the silicone grease cavity 8 is opened on the cylinder, and the silicone grease hole 3 is used to inject silicone grease into the silicone grease cavity 8; a sealing component, which includes a first soft sealing sleeve 2 and a second soft sealing sleeve 4, the first soft sealing sleeve 2 is used to seal the end of the cylinder close to the first installation cavity, the second soft sealing sleeve 4 is used to seal the end of the cylinder close to the second installation cavity, and the first soft sealing sleeve 2 and the second soft sealing sleeve 4 are both connected to the silicone grease cavity 8; an inlet cable nipple 1, which is arranged at the end of the cylinder close to the first installation cavity, is connected to the first soft sealing sleeve 2, and squeezes the first soft sealing sleeve 2 so that the first soft sealing sleeve 2 seals the end of the cylinder close to the first installation cavity; an outlet cable nipple 10, which is arranged at the end of the cylinder close to the second installation cavity, and is connected to the second soft sealing sleeve 4. The first soft sealing sleeve 4 is connected, and it squeezes the second soft sealing sleeve 4 so that the second soft sealing sleeve 4 seals one end of the cylinder body close to the second installation cavity; the pressure ring 6 is arranged in the second installation cavity, is connected with the second soft sealing sleeve 4, and is arranged at the end of the second soft sealing sleeve 4 away from the cable short section 10; the metal sleeve 5 is arranged in the second installation cavity, is arranged at the end of the pressure ring 6 away from the second soft sealing sleeve 4, one end of which is connected with the silicone grease cavity 8 and the other end is connected with the pressure ring 6, and the metal sleeve 5 is radially extended to form a flange 15, and the flange 15 is circumferentially provided with a plurality of openings 12. After the cable passes through the cable short section 1, the first soft sealing sleeve 2, the silicone grease cavity 8 and the metal sleeve 5 in sequence, the outer steel wire 11 of the cable passes through the opening 12 in the reverse direction, and the cable core 9 of the cable passes through the pressure ring 6, the second soft sealing sleeve 4 and the cable short section 10 in sequence and extends out, and the pressure ring 6 is pressed on the flange 15 to compress the outer steel wire 11. The logging bridle has a good sealing effect, is not easy to leak in the downhole high pressure environment, and has low requirements on the material and hardness of the metal sleeve.

[0028] In this embodiment, if Figure 5As shown, in order to facilitate connection with the instrument, the logging bridle also includes a locking cap 7 and an instrument connector 14. A boss 21 is provided at one end of the cable short section 10 away from the second soft sealing sleeve 4. The boss 21 is embedded in the locking cap 7. A limiting step 22 for limiting the axial movement of the boss 21 is provided inside the locking cap 7. The end of the boss 21 close to the cable short section 10 abuts against the limiting step 22. The end of the boss 21 away from the cable short section 10 is recessed to form a groove 16. After the outer steel wire 11 of the cable passes through the opening 12 in the reverse direction, the cable core 9 of the cable passes through the pressure ring 6, the second soft sealing sleeve 4 and the cable short section 10 in turn and extends into the groove 16. The instrument connector 14 is detachably connected to the locking cap 7, and the end of the instrument connector 14 close to the locking cap 7 extends into the groove 16. The instrument cable 20 passes through the instrument connector 14 and is connected to the cable core 9.

[0029] In this embodiment, Figure 5 As shown, in order to make the sealing effect of the logging bridle better, a plurality of annular grooves 13 are axially arranged on the outer peripheral side wall of one end of the instrument connector 14 close to the locking cap 7, and a sealing ring is installed in one annular groove 13, and the sealing ring is used to seal the gap between the outer peripheral side wall of one end of the instrument connector 14 close to the locking cap 7 and the inner side wall of the groove 16.

[0030] In this embodiment, if Figure 5 As shown, in order to facilitate the disassembly and assembly of the lock cap 7 and the instrument connector 14, a first external thread 17 is provided on the outer peripheral side wall of the instrument connector 14, and a first internal thread 18 is provided on the inner peripheral side wall of the end of the lock cap 7 close to the instrument connector 14, and the first external thread 17 is threadedly connected with the first internal thread 18. When disassembling, the cable can be separated from the instrument by simply loosening the lock cap 7, and the device is easy to use.

[0031] In this embodiment, in order to facilitate the disassembly and assembly of the cable inlet short section 1 and the cable outlet short section 10 with the cylinder, a second external thread is provided on the outer peripheral side wall of the cable inlet short section 1, and a second internal thread is provided at one end of the cylinder close to the cable inlet short section 1, and the second external thread is threadedly connected with the second internal thread.

[0032] In this embodiment, if Figure 4 As shown, the inner diameter of the pressure ring 6 is the same as the inner diameter of the flange 15 , the outer diameter is the same as the outer diameter of the flange 15 , and the pressure ring 6 is coaxially arranged with the metal sleeve 5 .

[0033] In this embodiment, if Figure 2As shown, the metal sleeve 5 is a conical steel sleeve, the first soft sealing sleeve 2 is a first conical soft sealing sleeve, the second soft sealing sleeve 4 is a second conical soft sealing sleeve, the first conical soft sealing sleeve and the second conical soft sealing sleeve are oriented in the same direction, the small ends of the first conical soft sealing sleeve and the metal sleeve 5 are opposite, the first conical soft sealing sleeve is arranged in the first installation cavity, the outer wall of the first conical soft sealing sleeve is fitted with the inner wall of the first installation cavity, the large end of the first conical soft sealing sleeve is against the incoming cable short section 1, the large end of the second conical soft sealing sleeve is against the end of the pressure ring 6 away from the metal sleeve 5, the small end is embedded in the cable short section 10 and fits with the inner wall of the outgoing cable short section 10, and the end of the metal sleeve 5 close to the pressure ring 6 radially extends to form a flange 15.

[0034] In this embodiment, the first soft sealing sleeve 2 and the second soft sealing sleeve 4 are both made of insulating rubber.

[0035] In addition, specifically, a first through hole 19 for the cable to pass through is opened on the inlet cable short section 1, and a second through hole for the cable to pass through is opened on the outlet cable short section 10. The small end of the second soft sealing sleeve 4 is embedded in the second through hole and fits with the inner wall of the second through hole. The first through hole 19, the first soft sealing sleeve 2, the silicone grease cavity 8, the metal sleeve 5, the pressure ring 6, the second soft sealing sleeve 4 and the second through hole are coaxially arranged and connected in sequence.

[0036] Specific use process:

[0037] like Figure 1 As shown, after the first through hole 19, the first soft sealing sleeve 2, the silicone grease cavity 8, and the metal sleeve 5 are inserted into the cable in sequence, the outer steel wire 11 of the cable is reversed, and then the cable core 9 of the cable is passed through the pressure ring 6, the second soft sealing sleeve 4, and the cable outlet short section 10 in sequence, and then the cable inlet short section 1 and the cable outlet short section 10 are screwed several times, and the cable inlet short section 1 and the cable outlet short section 10 are respectively pressed against the first soft sealing sleeve 2 and the second soft sealing sleeve 4, and silicone grease is injected into the silicone cavity 8 through the silicone grease hole 3, and silicone grease overflows from the first through hole 19 and the second through hole, and finally, the first soft sealing sleeve 2 and the second soft sealing sleeve 4 are squeezed by continuously tightening the cable inlet short section 1 and the cable outlet short section 10, and the huge pressure causes the first soft sealing sleeve 2 and the second soft sealing sleeve 4 to deform, and the first soft sealing sleeve 2 and the second soft sealing sleeve 4 are embedded in the gap of the cable steel wire to achieve a better sealing effect;

[0038] like Figure 3 As shown, after the cable passes through the metal sleeve 5, the outer steel wire 11 is peeled off in sequence and reversely inserted into the opening 12, the long steel wire is cut off along the bottom surface of the metal sleeve 5, the steel wire is tightened, the pressure ring 6 is pressed on, and the cable short section 10 is tightened to compact the outer steel wire 11, so that the connection between the cable and the bridle is more secure.

[0039] like Figure 5 As shown, when the bridle is connected to the instrument, a sealing ring is installed in the annular groove 13, the instrument connector 14 is inserted into the groove 16, and the locking cap 7 is directly tightened to complete the connection.

[0040] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A logging bridle, characterized in that: include: A cylinder, wherein a first installation cavity, a silicone grease cavity and a second installation cavity are sequentially connected to each other along the axial direction, and a silicone grease hole connected to the silicone grease cavity is opened on the cylinder, and the silicone grease hole is used to inject silicone grease into the silicone grease cavity; A sealing assembly, comprising a first soft sealing sleeve and a second soft sealing sleeve, wherein the first soft sealing sleeve is used to seal an end of the cylinder body close to the first installation cavity, and the second soft sealing sleeve is used to seal an end of the cylinder body close to the second installation cavity, and both the first soft sealing sleeve and the second soft sealing sleeve are connected to the silicone grease cavity; A cable inlet nipple, which is disposed at one end of the cylinder body close to the first installation cavity, is communicated with the first soft sealing sleeve, and presses the first soft sealing sleeve so that the first soft sealing sleeve seals the end of the cylinder body close to the first installation cavity; A cable outlet nipple, which is disposed at one end of the cylinder body close to the second installation cavity, is communicated with the second soft sealing sleeve, and presses the second soft sealing sleeve so that the second soft sealing sleeve seals the end of the cylinder body close to the second installation cavity; A pressure ring is disposed in the second installation cavity, is communicated with the second soft sealing sleeve, and is disposed at an end of the second soft sealing sleeve away from the cable outlet nipple; A metal sleeve is arranged in the second installation cavity, and is arranged at one end of the pressure ring away from the second soft sealing sleeve, one end of which is connected to the silicone grease cavity, and the other end is connected to the pressure ring, and the metal sleeve radially extends to form a flange, and the flange is circumferentially provided with a plurality of openings, after the cable passes through the inlet cable nipple, the first soft sealing sleeve, the silicone grease cavity and the metal sleeve in sequence, the outer steel wire of the cable passes through the opening in the reverse direction, the cable core of the cable passes through the pressure ring, the second soft sealing sleeve and the outlet cable nipple in sequence, and the pressure ring is pressed against the flange to press the outer steel wire, wherein the metal sleeve is a conical steel sleeve, and the first The soft sealing sleeve is a first conical soft sealing sleeve, and the second soft sealing sleeve is a second conical soft sealing sleeve. The first conical soft sealing sleeve and the second conical soft sealing sleeve have the same orientation, and the small ends of the first conical soft sealing sleeve and the metal sleeve are opposite to each other. The first conical soft sealing sleeve is arranged in the first installation cavity, and the outer wall of the first conical soft sealing sleeve is in contact with the inner wall of the first installation cavity. The large end of the second conical soft sealing sleeve is against the end of the pressure ring away from the metal sleeve, and the small end is embedded in the cable outlet short section and in contact with the inner wall of the cable outlet short section. The end of the metal sleeve close to the pressure ring radially extends to form the flange. A locking cap and an instrument connector, a boss is provided at one end of the cable outlet short section away from the second soft sealing sleeve, the boss is embedded in the locking cap, a limiting step for limiting the axial movement of the boss is provided inside the locking cap, the end of the boss close to the cable outlet short section abuts against the limiting step, the end of the boss away from the cable outlet short section is recessed to form a groove, the cable core extends into the groove, the instrument connector is detachably connected to the locking cap, and the end of the instrument connector close to the locking cap extends into the groove, and the instrument cable passes through the instrument connector and is connected to the cable core.

2. The well logging bridle according to claim 1, characterized in that: The outer peripheral side wall of one end of the instrument connector close to the locking cap is axially provided with a plurality of annular grooves, a sealing ring is installed in one of the annular grooves, and the sealing ring is used to seal the gap between the outer peripheral side wall of one end of the instrument connector close to the locking cap and the inner side wall of the groove.

3. The well logging bridle according to claim 1, characterized in that: A first external thread is arranged on the outer peripheral side wall of the instrument connector, and a first internal thread is arranged on the inner peripheral side wall of one end of the locking cap close to the instrument connector, and the first external thread is threadably connected with the first internal thread.

4. The well logging bridle according to claim 1, characterized in that: A second external thread is arranged on the outer peripheral side wall of the cable inlet short section, and a second internal thread is arranged on one end of the cylinder body close to the cable inlet short section, and the second external thread is threadably connected with the second internal thread.

5. The well logging bridle according to claim 1, characterized in that: The inner diameter of the pressure ring is the same as the inner diameter of the flange, the outer diameter is the same as the outer diameter of the flange, and the pressure ring is coaxially arranged with the metal sleeve.

6. The well logging bridle according to claim 1, characterized in that: The first soft sealing sleeve and the second soft sealing sleeve are both made of insulating rubber.

Images