Oil well separate recovery butt joint device

Abstract

The application discloses an oil well separate production butt joint device and belongs to the technical field of oil field development. The oil well separate production butt joint device comprises a first butt joint part and a second butt joint part. When separate layer oil production is carried out, the first butt joint part is first lowered into a well, when the first butt joint part reaches a first preset position in the well, a connecting assembly in the first butt joint part is pulled out of the well, then the second butt joint part is lowered into the well, in the process of lowering the second butt joint part, a guide head of the first butt joint part pierces a protective cover of the second butt joint part, the second butt joint part is continuously lowered into the well, and the first electrode is butt jointed with the second electrode. Since the outer wall of the first electrode is covered with conductive points, the first electrode can be connected with the second electrode through the conductive points, so that the butt joint success rate is improved. Moreover, the second butt joint part comprises a first protective sleeve, the first protective sleeve is filled with insulating silicone grease, the insulating silicone grease can isolate liquid, and liquid penetration is prevented, so that the butt joint success rate is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield development, and particularly relates to an oil well separate production butt joint device. BACKGROUND

[0002] The cable control type separate layer oil production technology can realize separate layer production allocation of multi-layer system reservoirs, and can monitor parameters such as separate layer liquid production, water cut and temperature and pressure in real time, tap the production capacity of low-yield layers and improve the final development effect of oilfields. However, it is found in the test process that the cable control type separate layer oil production technology has good application effect in rod type pump machine production wells with small displacement, but in pipe type pump machine production wells which need to be completed by using a split type pipe column, the oil well separate production butt joint device is needed to butt joint the cable, so as to meet the needs of downhole to ground two-way communication, production parameter monitoring and real-time regulation and control of produced liquid.

[0003] In the related art, the oil well separate production butt joint device comprises a first butt joint part and a second butt joint part. When separate layer oil production is performed, the first butt joint part is first lowered into the well, and then the second butt joint part is lowered into the well, so that the second butt joint part is butted with the first butt joint part.

[0004] However, during the process of lowering the first butt joint part into the well, pressurization needs to be performed from the wellhead. Liquid in the pressurization process is prone to seep into the first butt joint part, which causes the cable butt joint to fail, resulting in low butt joint success rate. SUMMARY

[0005] Embodiments of the present application provide an oil well separate production butt joint device which can improve butt joint success rate. The technical solution is as follows:

[0006] The present application provides an oil well separate production butt joint device, which comprises a first butt joint part and a second butt joint part. The first butt joint part comprises a coupling, a connecting assembly, a lower central pipe, a first lower joint, a guide head, a first joint body and a first electrode.

[0007] The upper end of the coupling is connected with a pipe column, and the lower end of the coupling is connected with the connecting assembly.

[0008] The upper end of the lower central pipe is connected with the lower end of the first joint body and the connecting assembly, respectively, and the lower end of the lower central pipe is connected with the first lower joint. The first joint body sequentially has the guide head and the first electrode from top to bottom. The outer wall of the first electrode is covered with conductive points, and the first lower joint is provided with a cable channel for connecting a cable joint.

[0009] The second butt joint part comprises a second joint body, a butt joint main body, a second lower joint, a first protective sleeve, a second electrode, a guide sleeve and a protective cover.

[0010] The lower end of the second joint body is connected with the docking body and the second lower joint respectively;

[0011] The upper end of the docking body is connected with the first protective sleeve, the lower end of the docking body is connected with the guide sleeve, and the outside of the guide sleeve is connected with the protective cover; wherein the inside of the first protective sleeve is filled with insulating silicone grease; and the second electrode is located in the docking body;

[0012] The connection assembly is used to be pulled out from the well when the first docking part reaches the first preset position in the well;

[0013] The guide head is used to pierce the protective cover when the second docking part is lowered into the well after the connection assembly is pulled out;

[0014] The first electrode is used to be connected with the second electrode through the conductive point after the guide head pierces the protective cover;

[0015] The guide sleeve is used to seal the insulating silicone grease in the first protective sleeve.

[0016] In a possible implementation, the connection assembly comprises an upper central pipe and a pipe sleeve;

[0017] The lower end of the coupling is connected with the upper end of the upper central pipe, and the middle part of the upper central pipe is provided with a shear pin groove and a plurality of water passing holes;

[0018] The upper end of the pipe sleeve is provided with a shear pin hole matched with the shear pin groove;

[0019] The shear pin hole is used to install a shear pin connecting the upper central pipe with the pipe sleeve;

[0020] The water passing hole is used to pass liquid, and the liquid is pumped into the well by a pump truck after the first docking part is lowered into the well.

[0021] In another possible implementation, the first docking part further comprises a first insulating sleeve and a second insulating sleeve;

[0022] The first insulating sleeve is located between the guide head and the first electrode, and the second insulating sleeve is located below the first electrode;

[0023] The outside of the first insulating sleeve and the outside of the second insulating sleeve are respectively provided with sealing grooves.

[0024] In another possible implementation, the first docking part further comprises a sealing head and a second protective sleeve;

[0025] The upper end of the sealing head is connected with the lower end of the first joint body, and the lower end of the sealing head is connected with the upper end of the second protective sleeve.

[0026] The lower end of the second protective sleeve is provided with a through hole along the axis, and the through hole is used for penetrating the cable.

[0027] In another possible implementation, the middle part of the first joint body is provided with a threading hole, and both sides of the threading hole are sealing grooves.

[0028] The threading hole is used for penetrating the cable.

[0029] In another possible implementation, the second joint body further comprises a third insulating sleeve and a fourth insulating sleeve.

[0030] The third insulating sleeve is located at the upper end of the second electrode, and the fourth insulating sleeve is located at the lower end of the second electrode.

[0031] The inside of the third insulating sleeve and the inside of the fourth insulating sleeve are respectively provided with sealing grooves.

[0032] In another possible implementation, the upper end of the second joint body is provided with a cable plug hole, and the lower end of the second joint body is provided with a fixing groove.

[0033] The cable plug hole is used for penetrating the cable plug.

[0034] The fixing groove is used for fixing the joint body.

[0035] In another possible implementation, the outside of the joint body is provided with a first joint part, a second joint part and a third joint part along the axis.

[0036] The first joint part is used for being inserted into the fixing groove.

[0037] The second joint part and the third joint part are respectively communicated with the inner cavity of the second joint body.

[0038] In another possible implementation, the second joint part further comprises a plug.

[0039] The first joint part is provided with a cable through hole, and the lower part of the cable through hole is provided with an electrode connecting hole perpendicular to the axis, and the electrode connecting hole is sealed by the plug.

[0040] The outside of the plug is provided with a sealing groove.

[0041] In another possible implementation, the second joint part further comprises a ring.

[0042] The collar is located in the second joint body and used for clamping the docking body.

[0043] The application provides an oil well separate recovery docking device. The device is lowered into a well first, and a first docking part reaches a first preset position in the well. A connecting assembly in the first docking part is pulled out of the well, and then a second docking part is lowered into the well. In the process of lowering the second docking part, a guide head of the first docking part pierces a protective cover of the second docking part. The second docking part is continuously lowered, and a first electrode is docked with a second electrode. Since the outer wall of the first electrode is covered with conductive points, the first electrode can be connected with the second electrode through the conductive points, thereby improving the docking success rate. In addition, the second docking part comprises a first protective sleeve, and the first protective sleeve is filled with insulating silicone grease. The insulating silicone grease can isolate liquid and prevent liquid from penetrating, thereby further improving the docking success rate.

[0044] It should be understood that the general description above and the following detailed description are only exemplary and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a schematic diagram of a first docking part provided by an embodiment of the application;

[0046] Figure 2 is a schematic diagram of a second docking part provided by an embodiment of the application;

[0047] Figure 3 is a schematic diagram of a first docking part provided by an embodiment of the application;

[0048] Figure 4 is a schematic diagram of a first electrode provided by an embodiment of the application; Figure 1 is a sectional view of A in FIG. 1;

[0049] Figure 5 is a schematic diagram of a first electrode provided by an embodiment of the application;

[0050] Figure 6 is a schematic diagram of a first docking part provided by an embodiment of the application;

[0051] Figure 7 is a schematic diagram of a first electrode provided by an embodiment of the application; Figure 2 is a sectional view of B in FIG. 1;

[0052] Figure 8 is a schematic diagram of a first docking part and a second docking part after completion of docking provided by an embodiment of the application.

[0053] The reference signs respectively represent:

[0054] 10- coupling, 11- connecting assembly, 12- lower central pipe, 13- first lower joint, 14- guide head,

[0055] 15- first joint body, 16- first electrode, 17- first insulating sleeve, 18- second insulating sleeve,

[0056] 19- sealing head, 20- second protective sleeve, 110- upper central pipe, 111- pipe sleeve, 1101- shear pin groove,

[0057] 1102- water passing hole, 1103- first sealing groove, 1104- second sealing groove, 1105- lock block hole,

[0058] 1106- lock block, 1110- shear pin hole, 1111- shear pin, 1112- third sealing groove, 1113- water passing hole,

[0059] 120- bridge type through hole, 121- limiting groove, 130- cable channel, 150- threading hole, 151- fourth sealing groove,

[0060] 160- conductive point;

[0061] 21- second joint body, 22- butt joint body, 23- second lower joint, 24- first protective sleeve,

[0062] 25- second electrode, 26- guide sleeve, 27- protective cover, 28- plug, 29- third insulating sleeve,

[0063] 30- fourth insulating sleeve, 31- ring, 210- cable plug hole, 211- joint offset hole, 212- fixing groove,

[0064] 220- first butt joint part, 221- second butt joint part, 222- third butt joint part,

[0065] 223- upper sealing groove, 224- lower sealing groove, 225- plug connecting hole, 226- cable through hole,

[0066] 227- electrode connecting hole, 230- fifth sealing groove, 240- protective sleeve, 241- air passing hole,

[0067] 250- seventh sealing groove, 251- eighth sealing groove, 280- sixth sealing groove, 290- ninth sealing groove,

[0068] 300- tenth sealing groove. DETAILED DESCRIPTION

[0069] In order to make the technical solutions and advantages of the present application more clear, the embodiments of the present application are described in further detail below.

[0070] The terms "first", "second", "third", and "fourth" and the like in the description and in the claims of the present application and in the accompanying drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "include", "have", and the like when used herein are meant to encompass the presence of successors, equivalents, equivalents, modifications, or alternatives of follows the listed objects including a series of steps or units and are not limited to the listed objects. For example, a process, a method, a system, a product, or an apparatus including a series of steps or units is not limited to the listed steps or units, but can optionally further include other steps or units not listed or can optionally further include other steps or units inherent to such processes, methods, products, or apparatuses.

[0071] The present application provides an oil well separate production butt joint device, which comprises a first butt joint part and a second butt joint part;

[0072] Referring to Figure 1 , the first butt joint part comprises a coupling 10, a connecting assembly 11, a lower central pipe 12, a first lower joint 13, a guide head 14, a first joint body 15, and a first electrode 16;

[0073] The upper end of the coupling 10 is connected with a pipe string, and the lower end of the coupling 10 is connected with the connecting assembly 11;

[0074] The upper end of the lower central pipe 12 is connected with the lower end of the first joint body 15 and the connecting assembly 11 respectively, and the lower end of the lower central pipe 12 is connected with the first lower joint 13; the guide head 14 and the first electrode 16 are sequentially sleeved on the first joint body 15 from top to bottom; wherein the outer wall of the first electrode 16 is covered with conductive points 160, and the first lower joint 13 is provided with a cable passage 130 for connecting a cable joint;

[0075] Referring to Figure 2 , the second butt joint part comprises a second joint body 21, a butt joint main body 22, a second lower joint 23, a first protective sleeve 24, a second electrode 25, a guide sleeve 26, and a protective cover 27;

[0076] The lower end of the second joint body 21 is connected with the butt joint main body 22 and the second lower joint 23 respectively;

[0077] The upper end of the butt joint main body 22 is connected with the first protective sleeve 24, the lower end of the butt joint main body 22 is connected with the guide sleeve 26, and the outer part of the guide sleeve 26 is connected with the protective cover 27; wherein the inside of the first protective sleeve 24 is filled with insulating silicone grease; the second electrode 25 is located in the butt joint main body 22;

[0078] The connecting assembly 11 is used for tripping out of the well when the first butt joint part reaches a first preset position in the well;

[0079] The guide head 14 is used for piercing the protective cover 27 when the second butt joint part is tripped into the well after the connecting assembly 11 is tripped out;

[0080] The first electrode 16 is used to connect with the second electrode 25 through the conductive points 160 after the guide head 14 pierces the protective cover 27.

[0081] The guide sleeve 26 is used to seal the insulating silicon grease in the first protective sleeve 24.

[0082] The application provides an oil well separate production butt joint device. The device is firstly lowered into a well in a first butt joint part. When the first butt joint part reaches a first preset position in the well, the connecting assembly 11 in the first butt joint part is pulled out of the well, and then a second butt joint part is lowered. In the process of lowering the second butt joint part, the guide head 14 of the first butt joint part pierces the protective cover 27 of the second butt joint part, and the first electrode 16 is connected with the second electrode 25 by continuously lowering the second butt joint part. Since the outer wall of the first electrode 16 is covered with the conductive points 160, the first electrode 16 can be connected with the second electrode 25 through the plurality of conductive points 160, thereby improving the butt joint success rate. In addition, the second butt joint part comprises the first protective sleeve 24, and the first protective sleeve 24 is filled with insulating silicon grease. The insulating silicon grease can isolate liquid and prevent liquid from penetrating, thereby further improving the butt joint success rate.

[0083] The first butt joint part will be introduced first.

[0084] In a possible implementation, referring to Figure 3 The connecting assembly 11 comprises an upper central pipe 110 and a pipe sleeve 111.

[0085] The lower end of the coupling 10 is connected with the upper end of the upper central pipe 110, and the middle part of the upper central pipe 110 is provided with a shear pin groove 1101 and a plurality of water passing holes 1102.

[0086] The upper end of the pipe sleeve 111 is provided with a shear pin hole 1110 matched with the shear pin groove 1101.

[0087] The shear pin hole 1110 is used to install a shear pin 1111 for connecting the upper central pipe 110 with the pipe sleeve 111.

[0088] The water passing hole 1102 is used to flow liquid, which is pumped into the well by a pump truck after the first butt joint part is lowered into the well.

[0089] In the embodiment of the application, the upper end of the coupling 10 is an API (American Petroleum Institute) standard thickened screw thread buckle, which is connected with a pipe string; the lower end of the coupling 10 is a flat type screw thread buckle, and the upper end of the upper central pipe 110 is a male screw thread buckle, which is threadedly connected with the lower end of the coupling 10.

[0090] The upper center pipe 110 is provided with a shear pin groove 1101 at the upper middle end, and is provided with a plurality of water passing holes 1102 perpendicular to the center axis at the lower middle end, and the lower ends of the plurality of water passing holes 1102 are provided with a first sealing groove 1103, and the first sealing groove 1103 is located outside the pipe of the upper center pipe 110; the lower part of the upper center pipe 110 is provided with a second sealing groove 1104, and the second sealing groove 1104 is located inside the pipe of the upper center pipe 110, and the lower end of the second sealing groove 1104 is provided with a plurality of lock block holes 1105 perpendicular to the center axis, and the plurality of lock block holes 1105 are used to place the lock block 1106.

[0091] The upper center pipe 110 cooperates with the pipe sleeve 111, the upper end of the pipe sleeve 111 is provided with a shear pin hole 1110 matched with the shear pin groove 1101, the shear pin hole 1110 can be provided with a shear pin 1111, and the shear pin 1111 is used to control the release of the oil production tool string. The lower end of the shear pin 1111 is a third sealing groove 1112 matched with the upper center pipe 110. The middle part of the pipe sleeve 111 is provided with a plurality of water passing holes 1113 perpendicular to the center axis, and the lower end of the pipe sleeve 111 is a diameter expanding hole, which is used to release the restriction of the lock block 1106 and realize the release of the pipe string.

[0092] The upper end of the lower center pipe 12 is provided with external threads, and is threadedly connected with the lower end of the first joint body 15. The lower end of the external threads of the lower center pipe 12 is provided with a plurality of bridge type through holes 120, and the bridge type through holes 120 are used to communicate the upper and lower cavities, as shown in Figure 4 The lower part of the bridge type through hole 120 is a limiting groove 121 matched with the lock block 1106 placed at the lower end of the upper center pipe 110, and is used to control the release of the oil production tool string.

[0093] The lower end of the lower center pipe 12 is provided with male threads, and is threadedly connected with the upper end of the first lower joint 13. The lower end of the first lower joint 13 is an API standard internal thread buckle. The inner side of the first lower joint 13 is provided with a through hole, which is a cable channel 130, and is used to connect a cable joint.

[0094] In the embodiment, the design of the bridge type through hole 120 can make the oil production tool string be smoothly set, and realize the intelligent separate production of the pipe pump. The cable is arranged in the cable channel 130, so that the data can be safely transmitted. When the restriction of the lock block 1106 is released, the designed release structure can realize the release process after further pressing after setting.

[0095] In a possible implementation, the first joint body 15 is a hollow columnar body, and the lower end is an internal thread buckle, which is threadedly connected with the upper end of the lower center pipe 12. The middle part of the first joint body 15 is provided with a wire passing hole 150 perpendicular to the center axis, and the two sides of the wire passing hole 150 are sealing grooves. The wire passing hole 150 is used to pass through a cable. In order to be easily distinguished, the sealing grooves on the two sides of the wire passing hole 150 are referred to as fourth sealing grooves 151.

[0096] In the embodiment of the present application, the first joint body 15 is sequentially sleeved with the guide head 14 and the first electrode 16 along the axis from top to bottom. The upper part of the guide head 14 is conical, and the inner side of the lower part is threaded and connected with the upper part of the first joint body 15. The first electrode 16 is hollow cylindrical and made of conductive material. The outer part of the cylinder is irregularly covered with a full of stars contact structure, i.e. conductive points 160, see Figure 5 ; The two ends of the tube of the first electrode 16 are respectively provided with sealing grooves.

[0097] In a possible implementation, the first connecting part further comprises: a first insulating sleeve 17 and a second insulating sleeve 18.

[0098] The first insulating sleeve 17 is located between the guide head 14 and the first electrode 16, and the second insulating sleeve 18 is located below the first electrode 16. Correspondingly, the first joint body 15 is sequentially sleeved with the guide head 14, the first insulating sleeve 17, the first electrode 16 and the second insulating sleeve 18 along the axis.

[0099] The first insulating sleeve 17 and the second insulating sleeve 18 are both hollow cylindrical and made of insulating material. The outer part of the first insulating sleeve 17 and the outer part of the second insulating sleeve 18 are both provided with sealing grooves.

[0100] In a possible implementation, the first connecting part further comprises: a sealing head 19 and a second protective sleeve 20.

[0101] The upper end of the sealing head 19 is connected with the lower end of the first joint body 15, and the lower end of the sealing head 19 is connected with the upper end of the second protective sleeve 20.

[0102] The lower end of the second protective sleeve 20 is provided with a through hole along the axis, which is used for passing through the cable.

[0103] In this implementation, the lower end of the first joint body 15 has an axial small hole with internal threads. The sealing head 19 has a through hole along the axis, and the upper end and the lower end of the sealing head 19 both have external threads. The external threads of the upper end of the sealing head 19 are connected with the internal threads of the axial small hole of the lower end of the first joint body 15.

[0104] The second protective sleeve 20 is hollow tubular, the upper end is internally threaded, and the lower end has a through hole along the axis, which can pass through the cable. The upper end of the second protective sleeve 20 is threadedly connected with the lower end of the sealing head 19.

[0105] In the embodiment of the present application, before the first joint part is lowered into the well, the lower end of the first joint part is screwed with the upper end of the production tool string, the upper end of the first joint part is connected with the multifunctional connector, and then the first trip string operation is performed. When the first joint part, the production tool string and the multifunctional connector are lowered to the engineering design position, i.e., the first preset position, the steel ball is put into the multifunctional connector, the steel ball falls in the multifunctional connector, the passage of the oil jacket communication is closed, and then the ground pump truck is pressed to perform the initial setting of the packer, and then the step-by-step pressing is performed to complete the packer operation of different production layers of the oil well. Continue to press, the liquid flows through the water hole 1102 of the upper central pipe 110, pushes the sleeve 111 to move upward along the axis, and the nail 1111 is cut off under a certain pump pressure. The sleeve 111 continues to move upward under the action of hydraulic pressure, the lock block 1106 loses the limiting effect, the pipe string is lifted to realize the release of the sleeve 111, the upper pipe string is lifted, and the lower reserved production tool string with the remaining part of the first joint part is realized. Among them, the first joint part releases the sleeve 111, as shown in Figure 6 .

[0106] After the upper pipe string is lifted, the second trip string operation is performed, and the second joint part is lowered. The second joint part is introduced below.

[0107] In a possible implementation, continue to refer to Figure 2 , the second joint body 21 is hollow tubular, the upper end of the second joint body 21 has two offset holes along the axis, one is a cable plug hole 210, and the other is a joint offset hole 211 with API standard internal thread buckles. Among them, the cable plug hole 210 is used to pass through the cable plug; the lower end of the second joint body 21 at the same axis coplanar with the cable plug hole 210 is provided with a fixing groove 212 along the axial direction, which is used to fix the joint body 22, as shown in Figure 7 .

[0108] In the embodiment of the present application, the lower end of the second joint body 21 is connected with the joint body 22 and the second lower joint 23 respectively. Among them, the second lower joint 23 is hollow tubular, the upper end has external threads, is screwed with the lower end of the second joint body 21, and the middle part of the second lower joint 23 is provided with a fifth sealing groove 230.

[0109] The joint body 22 is hollow cylindrical, the upper and lower ends along the axis are respectively provided with internal threads, and the joint body 22 is respectively provided with an upper sealing groove 223 and a lower sealing groove 224 along the axial cavity. The outer part of the joint body 22 is uniformly distributed with three joint segments along the axis, which are a first joint segment 220, a second joint segment 221 and a third joint segment 222 respectively; and the radius of the first joint segment 220 is greater than the radius of the second joint segment 221 and the third joint segment 222;

[0110] Among them, the first joint segment 220 is used to be inserted into the fixing groove 212;

[0111] The second and third mating segments 221 and 222 are matched with the inner cavity of the second joint body 21.

[0112] In a possible implementation, the second mating part further comprises a plug 28.

[0113] The first mating segment 220 is provided with a cable through hole 226 and a plug connection hole 225 parallel to the axis, and an electrode connection hole 227 perpendicular to the axis is arranged below the cable through hole 226, and the electrode connection hole 227 is sealed by the plug 28.

[0114] The plug 28 is provided with a sealing groove on the outside.

[0115] In this implementation, the sealing groove on the outside of the plug 28 is referred to as the sixth sealing groove 280 for easy identification.

[0116] In the embodiment, the upper end of the mating body 22 is connected with the first protective sleeve 24, and the lower end of the mating body 22 is connected with the guide sleeve 26. The lower end of the first protective sleeve 24 is externally threaded and is threadedly connected with the upper end of the mating body 22. The upper end of the first protective sleeve 24 is a sleeve 240, the middle part is provided with a gas permeable hole 241 perpendicular to the axis, and the inside is filled with high-temperature-resistant insulating silicone grease.

[0117] The upper end of the guide sleeve 26 is threadedly connected with the lower end of the mating body 22, and the guide sleeve 26 is externally threaded and connected with the protective cover 27. The protective cover 27 can be pierced, and the guide sleeve 26 is made of insulating material and is used to seal the high-temperature-resistant insulating silicone grease.

[0118] In the embodiment, by designing the first protective sleeve 24, filling the high-temperature-resistant insulating silicone grease, and the pierceable protective cover 27, the first mating part and the second mating part can be smoothly connected.

[0119] In a possible implementation, the second electrode 25 is located in the mating body 22, the second electrode 25 is a hollow cylinder, and is made of conductive material. The outer tube is provided with a seventh sealing groove 250 and an eighth sealing groove 251 at two ends respectively.

[0120] The mating body 22 further comprises a third insulating sleeve 29 and a fourth insulating sleeve 30, and the second mating part further comprises the third insulating sleeve 29 and the fourth insulating sleeve 30.

[0121] The third insulating sleeve 29 is located at the upper end of the second electrode 25, and the fourth insulating sleeve 30 is located at the lower end of the second electrode 25.

[0122] The third insulating sleeve 29 and the fourth insulating sleeve 30 are respectively provided with sealing grooves in the inside.

[0123] It can be seen that the third insulating sleeve 29, the second electrode 25 and the fourth insulating sleeve 30 are sequentially connected in the docking body 22 from top to bottom. The third insulating sleeve 29 and the fourth insulating sleeve 30 are both hollow cylindrical and are made of insulating material, and the pipes are respectively provided with sealing grooves. In order to distinguish, the sealing groove in the third insulating sleeve 29 is referred to as the ninth sealing groove 290, and the sealing groove in the fourth insulating sleeve 30 is referred to as the tenth sealing groove 300.

[0124] In a possible implementation, the second docking part further comprises a collar 31.

[0125] The collar 31 is located in the second joint body 21 and is used for clamping the docking body 22.

[0126] In this implementation, the collar 31 is annular and has a gap in the axial direction, is installed in the second joint body 21 and is used for clamping the docking body 22.

[0127] In the embodiment of the present application, when the second trip-in pipe string operation is performed, the second docking part is lowered, and when the second docking part is lowered to the engineering design position, the lowering is continued, the guide head 14 pierces the protective cover 27, and the first electrode 16 is connected to the second electrode 25 through the conductive point 160, so that the purposes of intelligent separate layer oil production of the tubular pump oil well and bidirectional communication from the well to the ground are achieved. In addition, the present application adopts the mode of prepositioning the first docking part and docking the second docking part, so that the reliability of repeated docking can be improved. As shown in the following table, after the first docking part and the second docking part are connected, the first electrode 16 is connected to the second electrode 25 through the conductive point 160. Figure 8

[0128] In summary, the present application is designed for separate layer oil production of an oil field, and through two trips of pipe strings for docking, cable communication and liquid production control of the downhole intelligent production allocation tool can be achieved, the problem that the intelligent separate layer production cannot be implemented for the tubular pump oil well is solved, and the separate layer oil production technical level is improved. The release is safe and reliable, the success rate of docking in a high-pressure environment is high, repeated docking can be implemented multiple times. In addition, the lower part of the pipe string does not need to be pulled out during pump inspection operation, the service life of the separate layer production process pipe string is improved, and the application range of the cable control type separate layer oil production technology is expanded.

[0129] The above description is only for the convenience of those skilled in the art to understand the technical solutions of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.​

Claims

1. An oil well commingling interface apparatus, comprising: The device comprises a first docking part and a second docking part; the first docking part comprises a coupling (10), a connecting assembly (11), a lower central pipe (12), a first lower joint (13), a guide head (14), a first joint body (15) and a first electrode (16); the upper end of the coupling (10) is connected with a pipe string, and the lower end of the coupling (10) is connected with the connecting assembly (11); the upper end of the lower central pipe (12) is connected with the lower end of the first joint body (15) and the connecting assembly (11) respectively, and the lower end of the lower central pipe (12) is connected with the first lower joint (13); the first joint body (15) is sequentially sleeved with the guide head (14) and the first electrode (16) from top to bottom; wherein the outer wall of the first electrode (16) is provided with conductive points (160), and the first lower joint (13) is provided with a cable passage (130) for connecting a cable joint; the second docking part comprises a second joint body (21), a docking main body (22), a second lower joint (23), a first protective sleeve (24), a second electrode (25), a guide sleeve (26), a protective cover (27) and a plug (28); the upper end of the second joint body (21) is provided with a cable plug hole (210), and the lower end of the second joint body (21) is provided with a fixing groove (212); the lower end of the second joint body (21) is connected with the docking main body (22) and the second lower joint (23) respectively; the upper end of the docking main body (22) is connected with the first protective sleeve (24), the lower end of the docking main body (22) is connected with the guide sleeve (26), and the outer part of the guide sleeve (26) is connected with the protective cover (27); wherein the inside of the first protective sleeve (24) is filled with insulating silicone grease; the second electrode (25) is located in the docking main body (22); the outer part of the docking main body (22) is provided with a first docking sub-lens (220), a second docking sub-lens (221) and a third docking sub-lens (222) along an axis, the first docking sub-lens (220) is provided with a cable through hole (226), the lower part of the cable through hole (226) is provided with an electrode connecting hole (227) perpendicular to the axis, the electrode connecting hole (227) is sealed by the plug (28); the outer part of the plug (28) is provided with a sealing groove; the connecting assembly (11) is used for being pulled out from the well when the first docking part reaches a first preset position in the well; the guide head (14) is used for piercing the protective cover (27) when the second docking part is lowered into the well after the connecting assembly (11) is pulled out; the first electrode (16) is used for being docked with the second electrode (25) through the conductive points (160) after the guide head (14) pierces the protective cover (27); the guide sleeve (26) is used for sealing the insulating silicone grease in the first protective sleeve (24); the cable plug hole (210) is used for penetrating a cable plug; The fixed groove (212) is used for fixing the butt joint body (22); The first butt joint part (220) is used for inserting into the fixed groove (212); The second butt joint part (221) and the third butt joint part (222) are respectively communicated with the inner cavity of the second joint body (21).

2. The apparatus of claim 1, wherein, The connecting assembly (11) comprises an upper central pipe (110) and a pipe sleeve (111); The lower end of the coupling (10) is connected with the upper end of the upper central pipe (110), and the middle part of the upper central pipe (110) is provided with a shear pin groove (1101) and a plurality of water passing holes (1102); The upper end of the pipe sleeve (111) is provided with a shear pin hole (1110) matched with the shear pin groove (1101); The shear pin hole (1110) is used for mounting a shear pin (1111) connecting the upper central pipe (110) with the pipe sleeve (111); The water passing hole (1102) is used for flowing liquid, and the liquid is pumped into the well by a pump truck after the first butt joint part is lowered into the well.

3. The apparatus of claim 1, wherein, The first butt joint part further comprises a first insulation sleeve (17) and a second insulation sleeve (18); The first insulation sleeve (17) is located between the guide head (14) and the first electrode (16), and the second insulation sleeve (18) is located below the first electrode (16); The outer part of the first insulation sleeve (17) and the outer part of the second insulation sleeve (18) are respectively provided with sealing grooves.

4. The apparatus of claim 3, wherein, The first butt joint part further comprises a sealing head (19) and a second protective sleeve (20); The upper end of the sealing head (19) is connected with the lower end of the first joint body (15), and the lower end of the sealing head (19) is connected with the upper end of the second protective sleeve (20); The lower end of the second protective sleeve (20) is provided with a through hole along the axis, and the through hole is used for penetrating a cable.

5. The apparatus of claim 4, wherein, The middle part of the first joint body (15) is provided with a threading hole (150), and the two sides of the threading hole (150) are sealing grooves; The threading hole (150) is used for penetrating a cable.

6. The apparatus of claim 1, wherein, The second butt joint part further comprises a third insulation sleeve (29) and a fourth insulation sleeve (30); The third insulation sleeve (29) is located at the upper end of the second electrode (25), and the fourth insulation sleeve (30) is located at the lower end of the second electrode (25); The inner part of the third insulation sleeve (29) and the inner part of the fourth insulation sleeve (30) are respectively provided with sealing grooves.

7. The apparatus of claim 1, wherein, The second butt joint part further comprises a clamping ring (31); The clamping ring (31) is located in the second joint body (21) and is used for clamping the butt joint body (22).

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