Underground wet-type butt joint device

Abstract

The utility model relates to the technical field of oil exploitation intelligent well completion, and discloses an underground wet-type butt joint device, which comprises a male joint part and a female joint part, an upper cable is arranged on one side of the male joint part, a locking cap is arranged on one side of the upper cable, a hoop is arranged at the bottom of the locking cap, and the female joint part is connected with the upper cable. One side of the upper cable is provided with a sealing mandrel, one side of the sealing mandrel is provided with a first sealing ring, and the top of the sealing mandrel is provided with a lifting nipple. The underground wet-type docking device not only can meet the filling and sand prevention operation of a lower well completion, but also can effectively communicate an upper well completion system and a lower well completion system, and effectively connects and separates an underground production fluid control system, an underground dynamic monitoring and signal transmission system and a ground remote control system; and the upper well completion and the lower well completion are effectively butted in a humid environment, so that the real-time monitoring and control of the underground production state are realized, and the exploitation effect of an oil well is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent well completion in petroleum exploitation, in particular to an underground wet docking device. Background Art

[0002] Intelligent completion is a new completion method. This technology is being used more and more widely. It realizes real-time monitoring of oil reservoirs and dynamic regulation of production through the application of intelligent sensors and downhole flow control tools. However, the current intelligent completion technology is only based on upper completion technology and cannot effectively connect the upper completion with the lower completion in a wet environment. Therefore, it is impossible to realize real-time monitoring and control of downhole production status, and the best mining effect is difficult to achieve.

[0003] Therefore, it is necessary to invent a large-diameter cable docking technology in a wet underground environment, which can not only meet the lower completion filling and sand prevention operations, but also effectively communicate the upper and lower completion systems, and effectively connect and separate the underground production fluid control system, the underground dynamic monitoring and signal transmission system and the ground remote control system. Utility Model Content

[0004] The purpose of the utility model is to provide an underground wet docking device to solve the problem proposed in the above background technology that the current intelligent completion technology is only based on the upper completion technology and cannot effectively dock the upper completion with the lower completion in a wet environment, thereby failing to realize real-time monitoring and control of the underground production status, and the optimal mining effect is difficult to achieve.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A downhole wet docking device, comprising a male connector part and a female connector part, an upper cable is arranged on one side of the male connector part, a locking cap is installed on one side of the upper cable, a clamp is arranged at the bottom of the locking cap, a sealing mandrel is arranged on one side of the upper cable, a first sealing ring is arranged on one side of the sealing mandrel, a lifting nipple is arranged on the top of the sealing mandrel, a plastic pin is fixedly connected to the inner wall of the sealing mandrel, a metal integrated block is arranged on the outer side of the upper cable, and an insulating basket is arranged on one side of the metal integrated block;

[0007] An insulating seat is sleeved on the outer surface of the sealing core shaft, and an elastic contact ring is installed on one side of the insulating seat, a copper wire is arranged at the bottom of the metal integrated block, an insulating sealing ring is installed on the outer side of the first sealing ring, a first anti-rotation pin is arranged on one side of the sealing core shaft, a back cap is installed on one side of the sealing core shaft, a plunger piston is arranged on one side of the sealing core shaft, and a floating sealing piston is installed on one side of the plunger piston, a second sealing ring is arranged on one side of the floating sealing piston, and a shear pin is installed on the inner wall of the floating sealing piston;

[0008] A positioning joint is fixedly connected to the bottom of the plunger piston, and a second anti-rotation pin is provided on one side of the positioning joint, an oil storage space is provided on the inner wall of the male joint part, and a release hole is fixedly connected to one side of the oil storage space, a one-way valve is installed on the outer surface of the release hole, and an insulating upper seat is provided on the upper end of the one-way valve, and an insulating lower seat is installed on the upper end of the one-way valve, a filling port is provided on one side of the oil storage space, and a mounting plug is installed on the inner wall of the filling port, a third sealing ring is provided on the inner wall of the sealing core shaft, and a through hole is provided on one side of the sealing core shaft;

[0009] An upper joint is provided on one side of the female joint part, and a fourth sealing ring is provided on one side of the upper joint, a lower joint is installed on the inner wall of the fourth sealing ring, and an upper insulating sleeve is provided on the inner wall of the lower joint, a fifth sealing ring is installed on one side of the upper insulating sleeve, and a middle insulating sleeve is provided on one side of the fifth sealing ring, a contact joint is installed inside the upper insulating sleeve, and a copper sleeve is provided on one side of the contact joint, and a lower insulating sleeve is installed on the outer surface of the copper sleeve;

[0010] A sixth sealing ring is arranged on one side of the lower insulating sleeve, a sealing ring group is installed inside the lower insulating sleeve, a lower cable is arranged on the inner wall of the lower joint, a flow hole is arranged on the inner wall of the copper sleeve, and a flow groove is arranged on the outer wall of the copper sleeve.

[0011] Preferably, the upper cable forms a fixed structure with the sealing core shaft through a locking cap, and the upper end of the upper cable is locked on the sealing core shaft by the locking cap and the clamp.

[0012] Preferably, the insulating basket forms a fixed structure with the sealing core shaft through plastic pins, and the metal integrated block is arranged inside the insulating basket.

[0013] Preferably, the upper cable is fixedly connected to an elastic contact ring through a metal integrated block, a copper wire, and is installed on a sealing core shaft.

[0014] Preferably, the insulating upper seat forms a fixed structure through the insulating lower seat and the one-way valve, and the one-way valve is arranged between the insulating upper seat and the insulating lower seat.

[0015] Preferably, the floating sealing piston is arranged between the first sealing ring and the second sealing ring, and the floating sealing piston is fixed on the plunger piston.

[0016] Preferably, one end of the lower cable is arranged to pass through the lower connector, and the lower cable forms a fixed structure with the lower connector through a locking cap.

[0017] Preferably, one end of the lower cable passes through the inner wall of the lower insulating sleeve, and the sixth sealing ring is arranged between the middle insulating sleeve and the lower insulating sleeve.

[0018] Preferably, the plunger piston forms a fixed structure with the sealing core shaft through a shear pin, and the shear pin is arranged between the plunger piston and the sealing core shaft.

[0019] Preferably, the male joint part forms a fixed structure with the lower joint through a positioning joint, and the number of flow grooves is multiple.

[0020] Compared with the prior art, the utility model has the following beneficial effects: the underground wet docking device,

[0021] The docking device in the utility model can not only meet the lower completion filling and sand prevention operations, but also effectively communicate the upper and lower completion systems, and effectively connect and separate the downhole production fluid control system, the downhole dynamic monitoring and signal transmission system and the ground remote control system, so that the upper completion and the lower completion can be effectively docked in a wet environment, thereby realizing real-time monitoring and control of the downhole production status, and improving the production effect of the oil well. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the male connector of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the first sealing core shaft and the locking cap of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the insulating seat and the elastic contact ring of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the elastic contact ring of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the insulating upper seat and the insulating lower seat of the utility model;

[0027] Figure 6 This is a partial structural diagram of the female connector of the utility model;

[0028] Figure 7 This is a schematic diagram of the clamp structure of the utility model;

[0029] Figure 8 It is a schematic diagram of the structure of the sealing ring group and the sixth sealing ring of the utility model;

[0030] Fig. 9 This is a schematic diagram of the structure of the flow channel of the utility model;

[0031] Fig.10 This is a schematic diagram of the locking cap structure of the utility model.

[0032] In the figure: 10, male connector; 101, lifting nipple; 102, upper cable; 103, locking cap; 104, clamp; 105, first sealing ring; 106, sealing mandrel; 107, plastic pin; 108, metal integrated block; 109, insulating basket; 110, insulating seat; 111, elastic contact ring; 112, copper wire; 113, insulating sealing ring; 114, first anti-rotation pin; 115, back cap; 116, shear pin; 117, floating sealing piston; 118, second sealing ring; 119, plunger piston; 120, second anti-rotation pin; 121, positioning connector; 12 4. Insulation upper seat; 125. One-way valve; 126. Release hole; 127. Insulation lower seat; 128. Plug; 129. Third sealing ring; 130. Oil storage space; 131. Filling port; 132. Through hole; 20. Female connector part; 201. Upper connector; 202. Fourth sealing ring; 203. Lower connector; 204. Upper insulating sleeve; 205. Fifth sealing ring; 206. Middle insulating sleeve; 207. Copper sleeve; 208. Contact connector; 209. Lower insulating sleeve; 210. Sealing ring assembly; 211. Lower cable; 212. Overflow hole; 213. Sixth sealing ring; 214. Overflow groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 ,picture, Fig. 9 and Fig.10The downhole wet docking device is mainly divided into a male connector part 10 and a female connector part 20. The female connector part 20 can be connected to other sand control operation pipe strings. The male connector part 10 carries an upper cable 102. The upper end of the upper cable 102 is locked on the sealing core shaft 106 by a locking cap 103 and a clamp 104. The sealing core shaft 106 is provided with a through hole 132. The upper cable 102 passes through the through hole 132 of the sealing core shaft 106. The upper cable 102 is armored on the outside and has an insulating layer on the inside. The lower end is connected to a metal integrated block 108. The metal integrated block 108 is placed in an insulating basket 109. The insulating basket 109 is made of insulating plastic and is fixed to the sealing core shaft 106 by a plastic pin 107. The lower end of the metal integrated block 108 is also connected to a copper wire. 112 is connected, and the other end of the copper wire 112 is connected to the elastic contact ring 111. The elastic contact ring 111 is installed on the insulating seat 110. The insulating seat 110 is made of insulating plastic. The insulating seat 110 is sleeved on the sealing core shaft 106. The sealing core shaft 106 is connected with a lifting short section 101. The lifting short section 101 is provided with a sealing ring 129 and a male connector part 10 connected and sealed with the sealing core shaft 106. The upper cable 102 is finally connected to the elastic contact ring 111 through the metal integrated block 108 and the copper wire 112, and is installed on the sealing core shaft 106. The sealing core shaft 106 is also provided with a sealing ring 105. The insulating sealing ring 113 is provided with a sealing ring 105 and sleeved on the sealing core shaft 106. The back cap 115 is connected to the sealing core shaft 106 and is provided with an anti-rotation pin 114 prevents loosening. The sealing core shaft 106 and the plunger piston 119 form an oil storage space 130. The oil storage space 130 is connected to the release hole 126. A one-way valve 125 is installed around the release hole 126. The function of the one-way valve 125 is that the insulating oil in the oil storage space 130 can be squeezed and can push the one-way valve 125 out through the release hole 126, and the external liquid is isolated from the outside by the one-way valve 125 and cannot enter the oil storage space 130. The upper end of the one-way valve 125 is equipped with an insulating upper seat 124, and the lower end is equipped with an insulating lower seat 127. The outer side of the insulating upper seat 124 is provided with a sealing ring 105, and the filling port 131 of the oil storage space 130 needs to be installed with a plug 128 after being filled with insulating oil. A floating sealing piston 117 is installed on the plunger piston 119. The floating sealing A sealing ring 105 is provided on the outside of the piston 117, and a sealing ring 118 is provided on the inside. The floating sealing piston 117 is fixed on the plunger piston 119. A circle of pin holes is provided on the floating sealing piston 117. The shear pin 116 is installed in the pin hole of the floating sealing piston 117, and the lower end is located in the shear groove of the plunger piston 119, fixing the position of the plunger piston 119 and the sealing mandrel 106, that is, the oil storage space 130 is in the maximum state. The lower end of the plunger piston 119 is connected to the positioning joint 121, and is provided with an anti-rotation pin 120. The female joint part 20 includes an upper joint 201 and a lower joint 203. A sealing ring 202 is provided on the upper joint 201. After being connected with the lower joint 203, the built-in through hole of the lower joint 203 is sealed, and the lower cable 211 passes through it.The lower end of the lower cable 211 is locked in the through hole of the lower connector 203 by the locking cap 103 and the clamp 104. The lower cable 211 is armored on the outside and has an insulating layer on the inside. The upper end is connected to the contact connector 208, and the contact connector 208 is connected to the copper sleeve 207. The outer periphery of the copper sleeve 207 is provided with an upper insulating sleeve 204, a middle insulating sleeve 206 and a lower insulating sleeve 209. A sealing ring 205 is provided between the upper insulating sleeve 204 and the middle insulating sleeve 206, and a sealing ring 205 is provided between the middle insulating sleeve 206 and the lower insulating sleeve 209. A sealing ring 213 is provided in the lower insulating sleeve 209, and a through hole is provided in the lower insulating sleeve 209, through which the lower cable 211 passes, and a sealing ring group 210 is provided at the end of the through hole. The inner circle of the copper sleeve 207 is provided with a flow hole 212, and the outer circle is provided with a flow groove 214. The male joint part 10 is connected with the female joint part 20 in the well, and the male joint part 10 enters the male joint part 10 from the upper port of the female joint part 20. The initial state is that the position of the plunger piston 119 and the sealing core shaft 106 is fixed by the shear pin 116, that is, the storage The oil space 130 is in the maximum state. After the male connector part 10 enters the female connector part 20, the lower end positioning connector 121 of the male connector is positioned at the lower end of the lower connector 203 of the female connector. The male connector part 10 continues to move downward. At this time, the shear pin 116 is cut off, the oil storage space 130 is compressed, and the insulating oil is squeezed out from the release port 126. As the male connector 10 moves downward, the squeezed insulating oil gradually fills the space where the copper sleeve 207 and the elastic contact ring 111 are located. The excess insulating oil passes through the flow hole 207. 12 flows away from the flow groove 214, and the oil storage space 130 is compressed to zero. At this time, the elastic contact ring 111 is in full contact with the copper sleeve 207, and the surrounding area is filled with insulating oil. The insulating upper seat 124, the insulating sealing ring 113, the upper insulating sleeve 204, the middle insulating sleeve 206, and the lower insulating sleeve 209 are all made of insulating materials. At this time, an insulating space is provided for the elastic contact ring 111 and the copper sleeve 207. The elastic contact ring 111 and the copper sleeve 207 can contact to establish signal transmission between the underground and the ground.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A downhole wet docking device, comprising a male connector part (10) and a female connector part (20), characterized in that: An upper cable (102) is arranged on one side of the male connector part (10), and a locking cap (103) is installed on one side of the upper cable (102), a clamp (104) is arranged at the bottom of the locking cap (103), a sealing core shaft (106) is installed on one side of the upper cable (102), and a first sealing ring (105) is installed on one side of the sealing core shaft (106), a lifting nipple (101) is arranged on the top of the sealing core shaft (106), a plastic pin (107) is fixedly connected to the inner wall of the sealing core shaft (106), a metal integrated block (108) is installed on the outer side of the upper cable (102), and an insulating basket (109) is arranged on one side of the metal integrated block (108); An insulating seat (110) is sleeved on the outer surface of the sealing core shaft (106), and an elastic contact ring (111) is installed on one side of the insulating seat (110); a copper wire (112) is arranged at the bottom of the metal integrated block (108); an insulating sealing ring (113) is installed on the outer side of the first sealing ring (105); a first anti-rotation pin (114) is arranged on one side of the sealing core shaft (106); a back cap (115) is installed on one side of the sealing core shaft (106); a rod piston (119) is arranged on one side of the sealing core shaft (106); a floating sealing piston (117) is installed on one side of the rod piston (119); a second sealing ring (118) is arranged on one side of the floating sealing piston (117); and a shear pin (116) is installed on the inner wall of the floating sealing piston (117); The bottom of the plunger piston (119) is fixedly connected to a positioning joint (121), and a second anti-rotation pin (120) is provided on one side of the positioning joint (121); an oil storage space (130) is provided on the inner wall of the male joint part (10), and a release hole (126) is fixedly connected to one side of the oil storage space (130); a one-way valve (125) is installed on the outer surface of the release hole (126), and an insulating upper seat (124) is provided on the upper end of the one-way valve (125); an insulating lower seat (127) is installed on the upper end of the one-way valve (125); a filling port (131) is provided on one side of the oil storage space (130), and a mounting plug (128) is installed on the inner wall of the filling port (131); a third sealing ring (129) is provided on the inner wall of the sealing core shaft (106), and a through hole (132) is provided on one side of the sealing core shaft (106); An upper joint (201) is provided on one side of the female joint part (20), and a fourth sealing ring (202) is provided on one side of the upper joint (201); a lower joint (203) is installed on the inner wall of the fourth sealing ring (202), and an upper insulating sleeve (204) is provided on the inner wall of the lower joint (203); a fifth sealing ring (205) is installed on one side of the upper insulating sleeve (204), and a middle insulating sleeve (206) is provided on one side of the fifth sealing ring (205); a contact joint (208) is installed inside the upper insulating sleeve (204), and a copper sleeve (207) is provided on one side of the contact joint (208); and a lower insulating sleeve (209) is installed on the outer surface of the copper sleeve (207); A sixth sealing ring (213) is provided on one side of the lower insulating sleeve (209), a sealing ring group (210) is installed inside the lower insulating sleeve (209), a lower cable (211) is provided on the inner wall of the lower joint (203), a flow hole (212) is provided on the inner wall of the copper sleeve (207), and a flow groove (214) is provided on the outer wall of the copper sleeve (207).

2. The downhole wet docking device according to claim 1, characterized in that: The upper cable (102) forms a fixed structure with the sealing core shaft (106) through the locking cap (103), and the upper end of the upper cable (102) is locked on the sealing core shaft (106) by the locking cap (103) and the clamp (104).

3. The downhole wet docking device according to claim 1, characterized in that: The insulating basket (109) forms a fixed structure with the sealing core shaft (106) through the plastic pin (107), and the metal integrated block (108) is arranged inside the insulating basket (109).

4. The downhole wet docking device according to claim 1, characterized in that: The upper cable (102) is fixedly connected via a metal integrated block (108), a copper wire (112) and an elastic contact ring (111), and is installed on a sealing core shaft (106).

5. The downhole wet docking device according to claim 1, characterized in that: The insulating upper seat (124) forms a fixed structure through the insulating lower seat (127) and the one-way valve (125), and the one-way valve (125) is arranged between the insulating upper seat (124) and the insulating lower seat (127).

6. The downhole wet docking device according to claim 1, characterized in that: The floating sealing piston (117) is arranged between the first sealing ring (105) and the second sealing ring (118), and the floating sealing piston (117) is fixed on the plunger piston (119).

7. The downhole wet docking device according to claim 1, characterized in that: One end of the lower cable (211) is arranged to pass through the lower connector (203), and the lower cable (211) forms a fixed structure with the lower connector (203) through a locking cap (103).

8. The downhole wet docking device according to claim 1, characterized in that: One end of the lower cable (211) passes through the inner wall of the lower insulating sleeve (209), and the sixth sealing ring (213) is arranged between the middle insulating sleeve (206) and the lower insulating sleeve (209).

9. The downhole wet docking device according to claim 1, characterized in that: The plunger piston (119) forms a fixed structure with the sealing core shaft (106) through a shear pin (116), and the shear pin (116) is arranged between the plunger piston (119) and the sealing core shaft (106).

10. The downhole wet docking device according to claim 1, characterized in that: The male joint part (10) forms a fixed structure with the lower joint (203) through the positioning joint (121), and the number of the flow grooves (214) is multiple.

Images