CN114165170A - High-temperature-resistant underground three-leg cable penetrator and connection method thereof - Google Patents
High-temperature-resistant underground three-leg cable penetrator and connection method thereof Download PDFInfo
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- CN114165170A CN114165170A CN202011303307.0A CN202011303307A CN114165170A CN 114165170 A CN114165170 A CN 114165170A CN 202011303307 A CN202011303307 A CN 202011303307A CN 114165170 A CN114165170 A CN 114165170A
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- cable
- core wire
- temperature
- top connection
- resistant
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 41
- 239000011810 insulating material Substances 0.000 claims description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 16
- 210000001503 joint Anatomy 0.000 claims description 12
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 9
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 9
- 241001330002 Bambuseae Species 0.000 claims description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 9
- 239000011425 bamboo Substances 0.000 claims description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 239000003129 oil well Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/023—Arrangements for connecting cables or wirelines to downhole devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Cable Accessories (AREA)
Abstract
The invention provides a high-temperature-resistant underground three-leg cable penetrator and a connection method thereof. The invention adopts the separate core wire penetrating process, can reduce the diameter of the cable penetrating hole of the packer or other downhole tools to 10mm, greatly reduces the required space for the cable penetrating, and provides a technical solution for the cable penetrating of a small casing or a complex tubular column oil well.
Description
Technical Field
The invention relates to the technical field of artificial lifting in oil exploitation, in particular to a high-temperature-resistant underground three-leg cable penetrator and a connecting method thereof.
Background
According to statistics, the stock quantity of the global thick oil is proved to be about 8150 hundred million tons in 2019, the stock quantity accounts for 70 percent of the residual stock quantity of the global oil, the stock quantity of the thick oil in the Bohai sea oil field in China also reaches more than 85 percent, and the hot recovery of the thick oil becomes increasingly important. The underground temperature of the heavy oil thermal recovery well is higher and can generally reach more than 300 ℃, the penetration safety guarantee of an underground power cable is particularly important, but no underground cable penetration product capable of resisting the temperature of more than 300 ℃ exists at present, and the negative influence is caused on the artificial lifting of the heavy oil thermal recovery.
The existing underground power cable traversing device of the electric submersible pump is of an integrated structure, the outer diameter of the underground power cable traversing device is larger than 40mm, and for some small-casing oil wells or complex tubular column oil wells, the underground cable traversing device cannot be installed and used due to size limitation, so that small-size compact underground cable traversing device products are urgently needed to be developed.
Disclosure of Invention
The invention overcomes the defects in the prior art, the existing cable penetrator cannot be installed and used due to the limited size, and provides the high-temperature-resistant underground three-leg cable penetrator and the connecting method thereof.
The purpose of the invention is realized by the following technical scheme.
The utility model provides a high temperature resistant three leg cable passes through ware in pit, includes top connection, a sealed section of thick bamboo, well joint and lower clutch, the tail end of top connection with the head end of a sealed section of thick bamboo links to each other, the tail end of a sealed section of thick bamboo with the head end of well joint links to each other, the lower clutch is installed in the surperficial through-hole department of packer or other downhole tools, and the heart yearn sinle silk of upper portion cable passes the top connection alone, stretches into in the sealed section of thick bamboo, and the heart yearn sinle silk of lower part cable passes lower clutch and well joint alone in proper order, and the heart yearn sinle silk of upper portion cable crosses the heart yearn sinle silk of connecting copper sheathing and lower part cable and links to each other to realize the purpose of the connection of upper portion cable and lower part cable.
The top connection comprises a top connection clamping sleeve, a top connection nut and a top connection main body, wherein an external thread is arranged on the outer wall of the head end of the top connection main body, the top connection nut is connected with the head end of the top connection main body through the external thread, the top connection clamping sleeve is arranged in a space formed by the top connection nut and the head end of the top connection main body, during connection, the top connection clamping sleeve can clamp a core wire sheath of an upper cable so as to seal the top connection with the core wire sheath of the upper cable, and the external thread is arranged on the outer wall of the tail end of the top connection main body so as to achieve the purpose of connecting the top connection main body with the sealing barrel.
The upper connector cutting sleeve adopts an inverted conical structure with a through hole in the middle.
The structure of the middle joint and the lower joint is the same as that of the upper joint.
The sealing barrel comprises a sealing barrel shell, an insulating material and a connecting copper sleeve, internal threads are formed in the inner walls of the head end and the tail end of the sealing barrel shell, the tail end of the upper joint main body is in threaded connection with the head end of the sealing barrel shell, the connecting copper sleeve is arranged in the sealing barrel shell, the sealing barrel shell is filled with the space formed by the connecting copper sleeve, the insulating material is filled in the space to achieve the high-temperature-resistant insulation purpose of a cable connecting point, and the tail end of the sealing barrel shell is in threaded connection with the head end of the middle joint.
The insulating material is mineral insulating material.
The upper cable and the lower cable are respectively composed of three core wires, each core wire is composed of a core wire core, a core wire sheath and a high-temperature-resistant insulating material, the high-temperature-resistant insulating material is coated on the outer side of each core wire core, and the core wire sheath is coated on the outer side of each high-temperature-resistant insulating material.
Set up the through-hole that runs through packer or other downhole tool on the surface of packer or other downhole tool, the quantity more than or equal to heart yearn sinle silk of through-hole has seted up the internal thread on the head end inner wall of through-hole, and the heart yearn sinle silk of lower part cable passes respectively from the through-hole to external screw thread through lower clutch main part tail end is in order to realize lower clutch and through-hole threaded connection and sealed purpose.
A connecting method of a high-temperature-resistant underground three-leg cable penetrator comprises the following steps:
step 1, removing a core wire sheath and a high-temperature-resistant insulating material from the tail end of each core wire of the upper cable to expose core wire cores, and enabling each core wire core to independently penetrate through an upper joint and then extend into an independent sealing cylinder;
step 2, after removing the core wire sheath and the high-temperature-resistant insulating material from the tail end of each core wire of the lower cable, exposing a core wire core, wherein each core wire core independently penetrates through the lower joint, and extends into an independent sealing cylinder after passing through the middle joint, and the core wire core of the upper cable extending into the sealing cylinder is connected with the core wire core of the lower cable by using the connecting copper sleeve so as to realize the purpose of connection of the upper cable and the lower cable.
The invention has the beneficial effects that: the invention adopts the mineralizer as the insulating material for the through connection of the underground cable, realizes the temperature resistance problem of the through connection of the underground cable, can be suitable for the underground environment temperature of 90-800 ℃, and meets various thermal recovery process requirements such as steam huff and puff; the invention adopts the separate core wire passing process, can reduce the diameter of the cable passing hole of the packer or other downhole tools to 10mm, greatly reduces the space required for cable passing, and provides a technical solution for the cable passing of a small casing or a complex tubular column oil well; the invention adopts the forming mode of the upper joint, the sealing cylinder, the middle joint and the lower joint, has reliable sealing, simple structure, low cost and convenient operation, and is beneficial to the low-cost and high-reliability penetrating production of the underground cable of the oil well.
Drawings
FIG. 1 is a schematic view of the mounting structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
in the figure: 1 is an upper cable, 2 is a core wire sheath, 3 is a high-temperature-resistant insulating material, 4 is a core wire core, 5 is an upper joint ferrule, 6 is an upper joint nut, 7 is an upper joint main body, 8 is a sealing cylinder shell, 9 is an insulating material, 10 is a connecting copper sleeve, 11 is a middle joint main body, 12 is a lower joint main body, 13 is a lower cable, 101 is an upper joint, 102 is a sealing cylinder, 103 is a middle joint, 104 is a lower joint, 201 is an oil pipe, and 202 is a packer;
for a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
The utility model provides a high temperature resistant three leg cable pass through ware in pit, including top connection 101, a sealing cylinder 102, well joint 103 and lower clutch 104, the tail end of top connection 101 links to each other with the head end of a sealing cylinder 102, the tail end of a sealing cylinder 102 links to each other with the head end of well joint 103, lower clutch 104 is installed in the surface through-hole department of packer 202 or other downhole tools, the heart yearn sinle silk 4 of upper portion cable 1 passes top connection 101 alone, stretch into in a sealing cylinder 102, the heart yearn sinle silk of lower part cable 13 passes lower clutch 104 and well joint 103 alone in proper order, the heart yearn sinle silk 4 of upper portion cable 1 links to each other with the heart yearn sinle silk of lower part cable 13 through connecting copper sheathing 10 to realize the purpose of the connection of upper portion cable 1 and lower part cable 13.
Example two
On the basis of embodiment one, top connection 101 includes top connection cutting ferrule 5, top connection nut 6 and top connection main part 7, the external screw thread has been seted up to the head end outer wall of top connection main part 5, top connection nut 6 links to each other through the head end of external screw thread with top connection main part 7, top connection cutting ferrule 5 sets up in the space that top connection nut 6 and the head end of top connection main part 7 formed, during the connection, top connection cutting ferrule 5 can chucking upper portion cable 1's heart yearn sheath 2, in order to realize the sealed of top connection 101 with upper portion cable 1's heart yearn sheath 2, the external screw thread has been seted up to the tail end outer wall of top connection main part 7, in order to realize the purpose of connecting top connection main part 7 and sealed section of thick bamboo 102.
The upper connector cutting sleeve 5 adopts an inverted conical structure with a through hole in the middle.
The structure of the middle joint 103 and the lower joint 104 is the same as that of the upper joint 101.
EXAMPLE III
On the basis of the second embodiment, the sealing cylinder 102 comprises a sealing cylinder shell 8, insulating materials 9 and a connecting copper sleeve 10, internal threads are formed on the inner walls of the head end and the tail end of the sealing cylinder shell 8, the tail end of the upper joint main body 7 is in threaded connection with the head end of the sealing cylinder shell 8, the connecting copper sleeve 10 is arranged in the sealing cylinder shell 8, the insulating materials 9 are filled in the space formed by the sealing cylinder shell 8 and the connecting copper sleeve 10, the purpose of high-temperature insulation of a cable connecting point is achieved, and the tail end of the sealing cylinder shell 8 is in threaded connection with the head end of the middle joint 103.
The insulating material 9 is mineral insulating material.
Example four
On the basis of the third embodiment, the upper cable 1 and the lower cable 13 are both composed of three core wires, each core wire is composed of a core wire core 4, a core wire sheath 2 and a high-temperature-resistant insulating material 3, the high-temperature-resistant insulating material 3 is coated on the outer side of the core wire core 4, and the core wire sheath 2 is coated on the outer side of the high-temperature-resistant insulating material 3.
The surface of the packer 202 or other downhole tools is provided with through holes penetrating through the packer 202 or other downhole tools, the number of the through holes is more than or equal to the number of the core wire cores 4, the inner threads are arranged on the inner wall of the head end of the through holes, the core wire cores of the lower cable 13 respectively pass through the through holes, and the purpose of threaded connection and sealing between the lower connector 104 and the through holes is achieved through the outer threads at the tail end of the lower connector main body 12.
EXAMPLE five
A connecting method of a high-temperature-resistant underground three-leg cable penetrator comprises the following steps:
step 1, removing a core wire sheath and a high-temperature-resistant insulating material from the tail end of each core wire of the upper cable to expose core wire cores, and enabling each core wire core to independently penetrate through an upper joint and then extend into an independent sealing cylinder;
step 2, after removing the core wire sheath and the high-temperature-resistant insulating material from the tail end of each core wire of the lower cable, exposing a core wire core, wherein each core wire core independently penetrates through the lower joint, and extends into an independent sealing cylinder after passing through the middle joint, and the core wire core of the upper cable extending into the sealing cylinder is connected with the core wire core of the lower cable by using the connecting copper sleeve so as to realize the purpose of connection of the upper cable and the lower cable.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The utility model provides a high temperature resistant three legged cable passes through ware in pit which characterized in that: including top connection, a sealed section of thick bamboo, well joint and lower clutch, the tail end of top connection with the head end of a sealed section of thick bamboo links to each other, the tail end of a sealed section of thick bamboo with the head end of well joint links to each other, the lower clutch is installed in the surperficial through-hole department of packer or other downhole tool, and the heart yearn sinle silk of upper portion cable passes the top connection alone, stretches into in the sealed section of thick bamboo, and the heart yearn sinle silk of lower part cable passes lower clutch and well joint alone in proper order, and the heart yearn sinle silk of upper portion cable crosses the heart yearn sinle silk of connecting copper sheathing and lower part cable and links to each other to realize the purpose of the connection of upper portion cable and lower part cable.
2. The high-temperature-resistant downhole three-leg cable crossing device according to claim 1, wherein: the top connection comprises a top connection clamping sleeve, a top connection nut and a top connection main body, wherein an external thread is arranged on the outer wall of the head end of the top connection main body, the top connection nut is connected with the head end of the top connection main body through the external thread, the top connection clamping sleeve is arranged in a space formed by the top connection nut and the head end of the top connection main body, during connection, the top connection clamping sleeve can clamp a core wire sheath of an upper cable so as to seal the top connection with the core wire sheath of the upper cable, and the external thread is arranged on the outer wall of the tail end of the top connection main body so as to achieve the purpose of connecting the top connection main body with the sealing barrel.
3. The high-temperature-resistant downhole three-leg cable crossing device according to claim 2, wherein: the upper connector cutting sleeve adopts an inverted conical structure with a through hole in the middle.
4. The high-temperature-resistant downhole three-leg cable crossing device according to claim 2, wherein: the structure of the middle joint and the lower joint is the same as that of the upper joint.
5. The high-temperature-resistant downhole three-leg cable crossing device according to claim 1, wherein: the sealing barrel comprises a sealing barrel shell, an insulating material and a connecting copper sleeve, internal threads are formed in the inner walls of the head end and the tail end of the sealing barrel shell, the tail end of the upper joint main body is in threaded connection with the head end of the sealing barrel shell, the connecting copper sleeve is arranged in the sealing barrel shell, the sealing barrel shell is filled with the space formed by the connecting copper sleeve, the insulating material is filled in the space to achieve the high-temperature-resistant insulation purpose of a cable connecting point, and the tail end of the sealing barrel shell is in threaded connection with the head end of the middle joint.
6. The high-temperature-resistant downhole three-leg cable crossing device according to claim 5, wherein: the insulating material is mineral insulating material.
7. The high-temperature-resistant downhole three-leg cable crossing device according to claim 1, wherein: the upper cable and the lower cable are respectively composed of three core wires, each core wire is composed of a core wire core, a core wire sheath and a high-temperature-resistant insulating material, the high-temperature-resistant insulating material is coated on the outer side of each core wire core, and the core wire sheath is coated on the outer side of each high-temperature-resistant insulating material.
8. The high-temperature-resistant downhole three-leg cable crossing device according to claim 1, wherein: set up the through-hole that runs through packer or other downhole tool on the surface of packer or other downhole tool, the quantity more than or equal to heart yearn sinle silk of through-hole has seted up the internal thread on the head end inner wall of through-hole, and the heart yearn sinle silk of lower part cable passes respectively from the through-hole to external screw thread through lower clutch main part tail end is in order to realize lower clutch and through-hole threaded connection and sealed purpose.
9. A connecting method of a high-temperature-resistant underground three-leg cable penetrator is characterized by comprising the following steps: the method comprises the following steps:
step 1, removing a core wire sheath and a high-temperature-resistant insulating material from the tail end of each core wire of the upper cable to expose core wire cores, and enabling each core wire core to independently penetrate through an upper joint and then extend into an independent sealing cylinder;
step 2, after removing the core wire sheath and the high-temperature-resistant insulating material from the tail end of each core wire of the lower cable, exposing a core wire core, wherein each core wire core independently penetrates through the lower joint, and extends into an independent sealing cylinder after passing through the middle joint, and the core wire core of the upper cable extending into the sealing cylinder is connected with the core wire core of the lower cable by using the connecting copper sleeve so as to realize the purpose of connection of the upper cable and the lower cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011303307.0A CN114165170B (en) | 2020-11-19 | 2020-11-19 | High-temperature-resistant underground three-leg cable traversing device and connecting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011303307.0A CN114165170B (en) | 2020-11-19 | 2020-11-19 | High-temperature-resistant underground three-leg cable traversing device and connecting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114165170A true CN114165170A (en) | 2022-03-11 |
| CN114165170B CN114165170B (en) | 2024-10-11 |
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| CN114165170B (en) | 2024-10-11 |
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