A cable retrieval bi-directional gripping sealed through-cable packer and method of use

Abstract

The present application relates to packer and its using method, specifically relates to a cable lifting two-way clamping sealing cable through packer and its using method, used for solving the problem that the quality of electric submersible pump is small, and the cable cannot exert downward pressure, resulting in that the reliability of the electric submersible pump upper and lower annulus stress seat seal cannot be guaranteed when the conventional tubing and external cable cooperate with the downhole electric submersible pump to carry out oil production operation.The cable lifting two-way clamping sealing cable through packer directly lifts the electric submersible pump through the cable, and utilizes the weight of the electric submersible pump to start the anti-falling slip preliminary seat seal, then supplements the hydraulic pressure to the casing annular cavity at the ground wellhead, promotes the two-way clamping and seat seal of the cable through packer.At the same time, the present application discloses a using method of the cable lifting two-way clamping sealing cable through packer.

Description

TECHNICAL FIELD

[0001] The present application relates to packers and methods of using the same, and more particularly to a cable-lifting bidirectional clamping sealing cable-passing packer and a method of using the same. BACKGROUND

[0002] In the oilfield well oil production supporting tool scheme, with the continuous cable technology and the continuous cable quality constantly mature and the application range expanding, due to the utilization of conventional tubing and external cable cooperation with downhole electric submersible pump for oil production operation is subject to certain limitations, and the use of continuous cable lifting electric submersible pump for oil production is not only feasible but also low in construction cost, and in the later period, it can also cooperate with the cable-lifting electric submersible pump for oil production operation. However, due to the small quality of the electric submersible pump, and the cable cannot exert downward pressure, when the conventional tubing and the external cable cooperate with the downhole electric submersible pump for oil production operation, the reliability of the upper and lower annulus stress seat seal of the electric submersible pump cannot be guaranteed. SUMMARY

[0003] The purpose of the present application is to solve the problem that due to the small quality of the electric submersible pump, and the cable cannot exert downward pressure, when the conventional tubing and the external cable cooperate with the downhole electric submersible pump for oil production operation, the reliability of the upper and lower annulus stress seat seal of the electric submersible pump cannot be guaranteed, and to provide a cable-lifting bidirectional clamping sealing cable-passing packer and a method of using the same.

[0004] In order to solve the above-mentioned problems existing in the prior art, the present application provides the following technical solutions:

[0005] A cable-lifting bidirectional clamping sealing cable-passing packer, characterized in that: comprising a cable sealing adapter, a central rod and a top clamping slip assembly, an upper cone sleeve, a rubber sleeve assembly, a lower cone sleeve and a centralizing friction slip assembly which are sequentially sleeved on the central rod from top to bottom between the cable lifting cable and the electric submersible pump.

[0006] The cable sealing adapter is provided with a cable transition joint in the cable sealing adapter;

[0007] The central rod is provided with a biasing cable passing channel and an eccentric oil and water channel, the biasing cable passing channel inlet is located on the upper end face of the central rod, the biasing cable passing channel outlet is located on the lower part of the side wall of the central rod, the biasing cable passing channel is provided with a passing packer cable assembly, the upper end of the passing packer cable assembly is connected with the lower end of the cable lifting cable through the cable transition joint, and the lower end of the passing packer cable assembly is connected with the electric submersible pump through the biasing cable passing channel outlet; the side opening located above the top clamping slip assembly is provided on the side wall of the central rod, the side opening is communicated with the eccentric oil and water channel, and the outlet of the eccentric oil and water channel is located on the lower end face of the central rod;

[0008] The top clamping slip assembly is used for cooperating with the cone segment of the upper cone sleeve to prevent the cable-passing packer from moving upward due to the pressure in the well;

[0009] The rubber sleeve assembly is used to seal the annular cavity between the central rod and the sleeve after the outer expansion of the rubber sleeve assembly, so as to divide the annular cavity into upper and lower annular cavities;

[0010] The central rod side wall is provided with a plurality of long guide rail grooves and a plurality of short guide rail grooves, the plurality of long guide rail grooves and the plurality of short guide rail grooves are arranged in the axial direction, and the lower ends of the plurality of long guide rail grooves and the plurality of short guide rail grooves are communicated through the reversing guide rail groove, the top end height of the plurality of long guide rail grooves is higher than the top end height of the plurality of short guide rail grooves, the plurality of guide pins realize the axial movement of the central rod side wall through the plurality of long guide rail grooves and the plurality of short guide rail grooves, and the switching between the plurality of long guide rail grooves and the plurality of short guide rail grooves is realized through the reversing guide rail groove.

[0011] The central rod side wall is provided with a plurality of long guide rail grooves and a plurality of short guide rail grooves, the plurality of long guide rail grooves and the plurality of short guide rail grooves are arranged in the axial direction, and the lower ends of the plurality of long guide rail grooves and the plurality of short guide rail grooves are communicated through the reversing guide rail groove, the top end height of the plurality of long guide rail grooves is higher than the top end height of the plurality of short guide rail grooves, the plurality of guide pins realize the axial movement of the central rod side wall through the plurality of long guide rail grooves and the plurality of short guide rail grooves, and the switching between the plurality of long guide rail grooves and the plurality of short guide rail grooves is realized through the reversing guide rail groove.

[0012] Further, the anti-jacking slip body assembly comprises an anti-jacking slip body, a fixing screw, a first tongue-shaped compression spring and an anti-jacking slip, the anti-jacking slip body is threadedly connected with the central rod, the upper end of the first tongue-shaped compression spring is fixed on the anti-jacking slip body through the first fixing screw, and the lower end of the first tongue-shaped compression spring presses the upper end of the anti-jacking slip; the upper cone sleeve cone section extends into the lower end of the anti-jacking slip, and a plurality of circumferentially distributed push-away springs are arranged between the upper cone sleeve and the anti-jacking slip body, the upper end of each push-away spring is located in the first accommodating hole on the anti-jacking slip body, and the lower end of each push-away spring is located in the second accommodating hole on the upper cone sleeve.

[0013] Further, the anti-jacking slip body is provided with an annular protrusion on the side wall, a plurality of circumferentially distributed grooves are arranged on the annular protrusion, and the plurality of grooves divide the annular protrusion into a protruding centralizer block and a recessed flow passage.

[0014] Further, the central rod side wall is provided with a plurality of long guide rail grooves and a plurality of short guide rail grooves, the plurality of long guide rail grooves and the plurality of short guide rail grooves are arranged in the axial direction, and the lower ends of the plurality of long guide rail grooves and the plurality of short guide rail grooves are communicated through the reversing guide rail groove, the top end height of the plurality of long guide rail grooves is higher than the top end height of the plurality of short guide rail grooves, the plurality of guide pins realize the axial movement of the central rod side wall through the plurality of long guide rail grooves and the plurality of short guide rail grooves, and the switching between the plurality of long guide rail grooves and the plurality of short guide rail grooves is realized through the reversing guide rail groove.

[0015] The anti-falling slip body main body is sleeved on the central rod, the upper end of the anti-falling slip body main body is provided with a slip anti-falling ring and a plurality of anti-falling components; each anti-falling component comprises a second tongue-shaped compression spring and an anti-falling slip, the lower end of the second tongue-shaped compression spring is fixed on the upper end of the anti-falling slip body main body by a second fixing screw and is located in the slip anti-falling ring, and the upper end of the second tongue-shaped compression spring presses the lower end of the anti-falling slip; a plurality of friction components are arranged on the middle part of the outer wall of the anti-falling slip body main body, each friction component comprises a mounting groove arranged on the outer wall of the anti-falling slip body main body, an arc spring arranged in the mounting groove, and a friction block located at the periphery of the arc spring and clamped with the edge of the mounting groove, and the arc spring is used for applying a force away from the shaft center to the friction block, so that the outer surface of the friction block is pressed on the inner wall of the sleeve; a cavity is formed between the lower end of the anti-falling slip body main body and the inner wall of the protective cap, a guide pin spacer ring is arranged in the cavity, a plurality of guide pins are arranged on the inner wall of the guide pin spacer ring, and the guide pin spacer ring can be driven to rotate circumferentially in the reversing guide rail groove by the guide pins.

[0016] Further, a sealing component is arranged at the center of the upper end surface of the central rod, and is used for sealing the annular cavity between the through packer cable component and the central rod; the sealing component comprises a cylindrical groove located at the center of the upper end surface of the central rod, an annular pressing cap threadedly connected with the cylindrical groove, and a two-piece disc-shaped pressing plate located between the lower end of the annular pressing cap and the bottom surface of the cylindrical groove, and the two-piece disc-shaped pressing plate is used for limiting the rubber sleeve of the through packer cable component.

[0017] Further, the lower cone sleeve comprises a positioning ring sleeved on the central rod and an annular cone connected to the outer side of the positioning ring; the positioning ring, the annular cone and the central rod form a first cavity; an annular protrusion is arranged on the central rod and can move axially in the first cavity.

[0018] Further, the rubber sleeve component comprises a side sealing rubber sleeve, a rubber sleeve spacer ring, a middle sealing rubber sleeve, a spacer ring and a side sealing rubber sleeve arranged in sequence, the hardness of the middle sealing rubber sleeve is smaller than that of the side sealing rubber sleeve, and the middle sealing rubber sleeve is more easily deformed and expanded after being pressed.

[0019] Further, the cable transition joint comprises a cable transition upper joint, a transition cable and a cable transition lower joint arranged in sequence between the downhole cable and the through packer cable component.

[0020] Further, the through packer cable component comprises a cable component upper joint, a through packer cable and a cable component lower joint, the cable component upper joint is located in the cable sealing adapter and is connected with the cable transition lower joint, the through packer cable extends out of the outlet of the offset through cable passage after passing through the offset through cable passage, and the cable component lower joint is electrically connected with the electric submersible pump.

[0021] Further, a construction method of the cable pulling and releasing two-way clamping sealing through cable packer, which has the special features that it comprises the following steps:

[0022] Step 1, connecting the electric submersible pump, the through cable packer and the cable pulling and releasing cable in sequence on the ground, wherein the electric submersible pump and the through cable packer form a tool string;

[0023] Step 2, hoisting the whole formed in step 1 and putting it into the well;

[0024] Step 3, lowering the cable pulling and releasing cable, and ensuring that the guide pin in the centralizing and friction slip body assembly is located in the short guide rail slot when the through cable packer enters the wellhead casing, so as to avoid the through cable packer slip from being misseated during the entering process;

[0025] Step 4, continuing to lower the cable pulling and releasing cable and the tool string, so that the tool string reaches the preset working position;

[0026] Step 5, lifting and lowering the cable pulling and releasing cable according to the preset distance requirement, so that the guide pin in the centralizing and friction slip body assembly is changed into the long guide rail slot, and then the cable pulling and releasing cable is continuously lowered, the lower cone sleeve is moved downward to make the anti-falling slip in the centralizing and friction slip body assembly open and tightly abut against the inner wall of the casing, and the rubber sleeve assembly is compressed to expand outward, so as to seal the annular cavity between the rubber sleeve assembly and the casing, and separate the annular cavity between the upper and lower central rods of the rubber sleeve assembly and the casing;

[0027] Step 6, injecting water into the casing, and the injected water enters the electric submersible pump through the eccentric oil and water channel from the side opening, and the one-way valve in the electric submersible pump prevents the water from entering the casing, and the continuous water injection can make the casing full of water;

[0028] Step 7, injecting water from the upper part of the wellhead to pressurize the casing, so that the central rod continues to move downward, and relatively, under the upward pushing of the centralizing and friction slip body assembly and the downward pressure of the water in the casing on the central rod, the rubber sleeve assembly is further compressed, and at the same time, the upper cone sleeve is moved upward to make the anti-jacking slip in the anti-jacking slip body assembly outwardly expand and clamp the inner wall of the casing, so as to prevent the tool string from moving upward under the pressure of the bottom of the well;

[0029] Step 8, performing the preset working pressure test on the tool string, and the tool string needs to satisfy the preset working pressure without moving;

[0030] Step 9, after the setting is completed, the wellhead cable cutting and wellhead positioning procedures are completed;

[0031] Step 10, checking the electric submersible pump during operation or after the operation of the electric submersible pump is completed, and then lifting the cable pulling and releasing cable to release the slip.

[0032] Compared with the prior art, the beneficial effects of the present application are:

[0033] (1) The cable pulling bidirectional clamping sealing through cable packer of the present application directly pulls and releases the electric submersible pump through the cable, and uses the weight of the electric submersible pump to start the anti-falling slip to preliminarily seat the packer, then supplements the hydraulic pressure to the casing annulus at the wellhead on the ground to make the through cable packer bidirectionally clamp and seat, which solves the hidden danger that the through cable packer cannot be reliably clamped and seated due to the light weight of the electric submersible pump and the inability to apply downward pressure through the cable pulling.

[0034] (2) The cable pulling bidirectional clamping sealing through cable packer of the present application sets a push-away spring between the upper cone sleeve and the anti-jacking slip body, so that the upper cone sleeve is always separated from the anti-jacking slip when going down the well, thereby avoiding the misclamping of the anti-jacking slip during the downhole process.

[0035] (3) The cable pulling bidirectional clamping sealing through cable packer of the present application places the cable passing through the through cable packer in the center rod instead of outside the packer center rod, effectively solving the problem of sealing the annulus between the outer wall of the center rod and the inner wall of the casing, improving the sealing effectiveness, and avoiding the difficult problem of sealing the cable outside the pipe. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure diagram of one embodiment of the cable pulling bidirectional clamping sealing through cable packer of the present application;

[0037] Figure 2 The sectional view of Figure 1 (not showing the cable sealing connector);

[0038] Figure 3 The connection structure diagram of the center rod and the through packer cable in the embodiment of the present application;

[0039] Figure 4 The structure diagram of the cable transition joint in the embodiment of the present application;

[0040] Figure 5 The A-A sectional view of Figure 3 ;

[0041] Figure 6 The B-B sectional view of Figure 3 ;

[0042] Figure 7 The C-C sectional view of Figure 3 ;

[0043] Figure 8 The D-D sectional view of Figure 3 ;

[0044] Figure 9 The structure diagram ofFigure 3 EE cross-section of ;

[0045] Figure 10 for Figure 3 FF cross-section diagram;

[0046] Figure 11 Schematic diagram of the expanded structure of the long guide rail groove, the short guide rail groove and the reversing guide rail groove in an embodiment of the present invention;

[0047] Figure 12 Schematic diagram of the structure of the anti-top slip assembly in an embodiment of the present invention;

[0048] Figure 13 2 is a schematic structural diagram of the main body of the anti-top slip body in an embodiment of the present invention;

[0049] Figure 14 for Figure 12 GG section diagram;

[0050] Figure 15 for Figure 12 HH cross-section diagram;

[0051] Figure 16 for Figure 12 II-direction cross-section;

[0052] Figure 17 Schematic diagram of the structure of the upper cone sleeve in an embodiment of the present invention;

[0053] Figure 18 for Figure 17 JJ-direction rotation cross-section;

[0054] Figure 19 This is a schematic structural diagram of a rubber sleeve assembly in an embodiment of the present invention;

[0055] Figure 20 Schematic diagram of the structure of the righting friction slip assembly in an embodiment of the present invention;

[0056] Figure 21 Schematic diagram of the appearance of the righting friction slip assembly in an embodiment of the present invention;

[0057] Figure 22 Schematic diagram of the structure of the lower cone sleeve in an embodiment of the present invention;

[0058] Figure 23 This is a diagram of the reversing state of the cable packer in an embodiment of the present invention;

[0059] Figure 24 2. A diagram showing the setting state of the cable packer in an embodiment of the present invention;

[0060] Figure 25Structure diagram of the over-cable packer cable assembly in the embodiment of the present application.

[0061] The reference signs are explained as follows: 1-lifting cable; 2-cable sealing adapter; 3-cable transition joint, 301-cable transition upper joint, 302-transition cable, 303-cable transition lower joint; 4-over-cable packer cable assembly, 401-cable assembly upper joint, 402-over-cable packer cable, 403-cable assembly lower joint; 5-center rod, 501-annular compression cap, 502-two half disc type compression plate, 503-first rubber sleeve, 504-eccentric oil and water channel, 505-side opening, 506-annular step, 507-long guide rail groove, 508-short guide rail groove, 509-reversing guide rail groove, 510-biased over-cable passage; 6-anti-jacking slip body assembly, 601-anti-jacking slip body main body, 602-first fixing screw, 603-first tongue type compression spring, 604-anti-jacking slip, 605-first mounting hole, 606-groove; 7-push-away spring; 8-upper cone sleeve, 801-second mounting hole; 9-rubber sleeve assembly, 901-side sealing rubber sleeve, 902-rubber sleeve spacer ring, 903-middle sealing rubber sleeve; 10-lower cone sleeve, 1001-positioning ring, 1002-cone segment, 1003-first cavity; 11-centralizing friction slip body assembly, 1101-falling-prevention slip, 1102-second tongue type compression spring, 1103-second fixing screw, 1104-friction block, 1105-arc spring, 1106-guide pin spacer ring, 1107-protecting cap, 1108-guide pin, 1109-falling-prevention slip body main body, 1110-slip anti-disengagement ring, 1111-mounting groove; 12-electric submersible pump; 13-casing. DETAILED DESCRIPTION

[0062] The present application is further described below in conjunction with the drawings and exemplary embodiments.

[0063] An over-cable packer with lifting and releasing cable bidirectional clamping sealing, comprising a cable sealing adapter 2, a center rod 5, and an anti-jacking slip body assembly 6, an upper cone sleeve 8, a rubber sleeve assembly 9, a lower cone sleeve 10 and a centralizing friction slip body assembly 11 which are sequentially sleeved on the center rod 5 from top to bottom, and are sequentially connected between the lifting cable 1 and the electric submersible pump 12; the cable sealing adapter 2 and the center rod 5, and the center rod 5 and the electric submersible pump 12 are connected by threads.

[0064] The cable sealing adapter 2 is provided with a cable transition joint 3; the cable transition joint 3 comprises a cable transition upper joint 301, a transition cable 302 and a cable transition lower joint 303 which are sequentially arranged between the lower end of the lifting cable 1 and the over-cable packer cable assembly 4.

[0065] The center rod 5 is provided with a bias cable passage 510 and an eccentric oil channel 504; the bias cable passage 510 is in the shape of a long rectangular or circular hole, the entrance of the bias cable passage 510 is located on the upper end surface of the center rod 5, the exit of the bias cable passage 510 is located on the lower side wall of the center rod 5, and the bias cable passage 510 is provided with a through packer cable assembly 4, which comprises an upper cable assembly joint 401, a through packer cable 402 and a lower cable assembly joint 403; the upper cable assembly joint 401 is located in the cable sealing connector 2 and connected with the cable transition lower joint 303; the through packer cable 402 extends out of the exit of the bias cable passage 510 after passing through the bias cable passage 510; and the lower cable assembly joint 403 is electrically connected with the electric submersible pump 12, forming a current transmission channel.

[0066] The upper end surface of the center rod 5 is provided with a sealing assembly in the center for limiting the first rubber sleeve 503 of the through packer cable 402; the sealing assembly comprises a cylindrical groove located in the center of the upper end surface of the center rod 5, an annular compression cap 501 threadedly connected with the cylindrical groove, and a two-piece disc-type compression plate 502 located between the lower end of the annular compression cap 501 and the bottom surface of the cylindrical groove.

[0067] The side wall of the center rod 5 is provided with a side opening 505 above the anti-top slip body assembly 6, which is communicated with the eccentric oil channel 504, and the exit of the eccentric oil channel 504 is located on the lower end surface of the center rod 5.

[0068] The anti-top-kick body assembly 6 is used to cooperate with the taper section of the upper taper sleeve 8 to prevent the over-cable packer from moving upward due to the upward top of the pressure in the well. The anti-top-kick body assembly 6 includes an anti-top-kick body 601, a fixing screw, a first tongue-shaped compression spring 603, and an anti-top-kick 604. The anti-top-kick body 601 is threadedly connected with the central rod 5. The upper end of the first tongue-shaped compression spring 603 is fixed on the anti-top-kick body 601 by the first fixing screw 602. The lower end of the first tongue-shaped compression spring 603 presses the upper end of the anti-top-kick 604. The taper section of the upper taper sleeve 8 extends into the lower end of the anti-top-kick 604. Four circumferentially distributed push-away springs 7 are arranged between the upper taper sleeve 8 and the anti-top-kick body 601. The upper end of each push-away spring 7 is located in the first seating hole 605 on the anti-top-kick body 601, and the lower end is located in the second seating hole 801 on the upper taper sleeve 8. The push-away spring 7 can prevent the upper taper sleeve 8 from moving upward and expanding the anti-top-kick 604, ensuring that the over-cable packer can be smoothly lowered to the preset position. The sidewall of the anti-top-kick body 601 is provided with an annular protrusion. A plurality of circumferentially distributed grooves 606 are arranged on the annular protrusion. The plurality of grooves 606 divide the annular protrusion into a protruding centralizer and a recessed flow passage, which are used to ensure that the axis of the over-cable packer always coincides with the axis of the casing 13, so that the over-cable packer is smoothly lowered or lifted, and the local increase in the outer diameter of the anti-top-kick body 601 avoids the formation of a flow resistance in the local part of the well fluid.

[0069] The rubber sleeve assembly 9 is used to separate the annular cavity between the upper and lower central rods 5 and the casing 13 after the rubber sleeve assembly 9 is externally expanded under pressure. The rubber sleeve assembly 9 includes a side sealing rubber sleeve 901, a rubber sleeve spacer ring 902, a middle sealing rubber sleeve 903, a rubber sleeve spacer ring 902, and a side sealing rubber sleeve 901 arranged in sequence. The hardness of the middle sealing rubber sleeve 903 is less than that of the side sealing rubber sleeve 901, and it is easier to deform and expand externally under pressure.

[0070] The straightening friction slip assembly 11 is used to cooperate with the cone section of the lower cone sleeve 10 to prevent the cable packer from falling. The straightening friction slip assembly 11 includes an anti-falling slip body 1109, a slip anti-slip ring 1110, five anti-falling components, five friction components, a protective cap 1107, a guide pin spacer 1106 and two guide pins 1108; the anti-falling slip body 1109 is connected to the center rod 5 by a threaded connection, and a slip anti-slip ring 1110 and five anti-falling components are set on the upper end of the anti-falling slip body 1109; each of the anti-falling components includes a second tongue-shaped compression spring 1102 and an anti-falling slip 1101, and the lower end of the second tongue-shaped compression spring 1102 is fixed by a second fixing screw 1103 The second tongue-shaped compression spring 1102 is fixed on the upper end of the anti-falling slip body 1109 and is located in the slip anti-slip ring 1110. The upper end of the second tongue-shaped compression spring 1102 presses the lower end of the anti-falling slip 1101. Five friction components are provided in the middle of the outer wall of the anti-falling slip body 1109. Each friction component includes a mounting groove 1111 provided on the outer wall of the anti-falling slip body 1109, a bow spring 1105 provided in the mounting groove 1111, and a spring located outside the bow spring 1105 and in contact with the mounting groove 1111. The friction block 1104 is clamped at the edge of the groove 1111, and the bow spring 1105 is used to apply a force away from the axis to the friction block 1104, so that the outer surface of the friction block 1104 is pressed against the inner wall of the sleeve 13; a cavity is formed between the lower end of the anti-fall cava body 1109 and the inner wall of the protective cap 1107, and a guide pin spacer 1106 is arranged in the cavity. The guide pin spacer 1106 can be axially rotated in the cavity, and two guide pins 1108 are arranged on the inner wall of the guide pin spacer 1106.

[0071] The cone section of the lower cone sleeve 10 extends into the upper end of the anti-fall cava 1101, and the lower cone sleeve 10 includes a positioning ring 1001 sleeved on the center rod 5 and an annular cone 1002 connected to the outside of the positioning ring 1001; a first cavity 1003 is formed between the positioning ring 1001, the annular cone 1002 and the center rod 5; an annular protrusion 506 is provided on the center rod 5, and the annular protrusion 506 can move axially in the first cavity 1003.

[0072] The side wall of the center rod 5 is provided with two long guide grooves 507 evenly distributed around the circumference and two short guide grooves 508 evenly distributed around the circumference. The two long guide grooves 507 and the two short guide grooves 508 are all arranged axially, and the lower ends are connected through a reversing guide groove 509. The top height of the two long guide grooves 507 is higher than the top height of the two short guide grooves 508; the guide pin 1108 realizes the axial movement of the straightening friction slip body assembly 11 through the two long guide grooves 507 and the two short guide grooves 508, and realizes the switching between the two long guide grooves 507 and the two short guide grooves 508 through the reversing guide groove 509.

[0073] When the guide pin 1108 is at the top end of the short guide rail groove 508, the axial upward position of the straightening friction cava body assembly 11 relative to the center rod 5 is limited, the lower cone sleeve 10 cannot contact the cava teeth of the anti-fall cava 1101, the anti-fall cava 1101 is in a contracted state, and the rubber sleeve assembly 9 is in an uncompressed state.

[0074] When the guide pin 1108 is in the long guide rail groove 507, the center rod 5 can move downward relative to the straightening friction cava body assembly 11. When the lower cone sleeve 10 contacts the cava teeth of the anti-fall cava 1101, the guide pin 1108 has not reached the top of the long guide rail groove 507. Therefore, the center rod 5 drives the rubber sleeve assembly 9 and the lower cone sleeve 10 to move further downward. The lower cone sleeve 10 moves downward to open the anti-fall cava 1101 and tighten the inner wall of the sleeve 13. At the same time, the lower cone sleeve 10 moves upward along the center rod 5 under the reverse push of the straightening friction cava body assembly 11 and compresses the rubber sleeve assembly 9. The rubber sleeve assembly 9 expands outward under pressure, sealing the annular cavity between the rubber sleeve assembly 9 and the sleeve 13, and separating the rubber sleeve assembly 9. The annular cavity between the upper and lower center rods 5 and the casing 13; at the same time, the rubber sleeve assembly 9 and the upper cone sleeve 8 also move upward, and the upper cone sleeve 8 overcomes the thrust of the push-off spring 7, causing the anti-top-up slips 604 to press against the inner wall of the casing 13. At this time, the downward movement of the center rod 5 relative to the righting friction slip assembly 11 is achieved by the weight of the cable packer and the electric submersible pump 12. The pressure of the anti-top-up slips 604 and the anti-fall slips 1101 against the inner wall of the casing 13 is limited.

[0075] The present invention discloses a construction method of a cable packer using the cable lifting and releasing bidirectional clamping and sealing method, comprising the following steps:

[0076] Step 1: On the surface, sequentially connect the electric submersible pump 12 to the center rod 5, the upper connector 401 of the cable assembly to the lower cable transition connector 303, the upper cable transition connector 301 to the lower end of the lifting and releasing cable 1, and the center rod 5 to the cable sealing sleeve 2. The electric submersible pump 12 and the cable packer form a tool string.

[0077] Step 2: Lift the whole formed in step 1 and place it into the well;

[0078] Step 3: When lowering and lowering the cable 1 and passing through the cable packer into the wellhead casing 13, ensure that the guide pin 1108 in the righting friction slip assembly 11 is located in the short guide rail groove 508, the falling slip 1101 is in a retracted state, and the anti-top slip 604 is not in contact with the upper cone sleeve 8 under the elastic force of the push-off spring 7, so as to avoid the cable packer slip from being accidentally seated during the wellbore entry process;

[0079] Step 4: Continue lowering the lifting cable 1 and the tool string to the preset working position;

[0080] Step 5, the lifting and lowering cable 1 is lifted and lowered according to the preset distance requirement, the guide pin 1108 is changed from the short guide rail groove 508 into the long guide rail groove 507, the lifting and lowering cable is continuously lowered, the lower cone sleeve 10 moves downward to make the anti-falling slip 1101 open and tightly abut against the inner wall of the casing 13, and the middle sealing rubber sleeve 903 is pressed to expand outward, so as to seal the annular cavity between the middle sealing rubber sleeve 903 and the casing 13, and separate the annular cavity between the upper and lower central rods 5 of the rubber sleeve assembly 9 and the casing 13;

[0081] Step 6, since the weight of the through-cable packer and the electric submersible pump 12 is limited, and the lifting and lowering cable 1 cannot exert downward pressure, water needs to be injected into the casing 13. The injected water enters the electric submersible pump 12 through the eccentric oil and water channel 504 from the side opening 505, and the one-way valve in the electric submersible pump 12 prevents water from entering the casing 13. Continuous water injection can make the casing 13 full of water;

[0082] Step 7, water injection and pressure test are performed on the casing 13 from the upper part of the wellhead, so that the central rod 5 continues to move downward, and the opposite, the central rod 5 is pushed upward by the centralizing friction slipper body assembly 11 and the water in the casing 13, and the side sealing rubber sleeve 901 and the middle sealing rubber sleeve 903 are further pressed to expand outward, while the upper cone sleeve 8 is pushed upward to make the anti-top slipper 604 expand outward and tightly abut against the inner wall of the casing 13, so as to prevent the tool string from moving upward under the pressure of the well bottom;

[0083] Step 8, the tool string is subjected to a pre-set working pressure test, and the tool string needs to meet the pre-set working pressure without moving;

[0084] Step 9, after the setting is completed, the wellhead lifting and lowering cable 1 is cut and the wellhead is positioned;

[0085] Step 10, check the electric submersible pump 12 during operation or after operation, and then lift the lifting and lowering cable to release the slip;

[0086] The specific process is as follows: the lifting and lowering cable 1 is lifted, the central rod 5 drives the anti-top slipper body assembly 6 to move upward, the anti-top slipper 604 moves away from the upper cone sleeve 8, and the anti-top slipper 604 contracts to release the slip; the central rod 5 continues to move upward, the side sealing rubber sleeve 901 and the middle sealing rubber sleeve 903 rebound to contract and release the seal, the annular cavity between the upper and lower central rods 5 of the rubber sleeve assembly 9 and the casing 13 is communicated, and the tool string is balanced in pressure; the central rod 5 continues to move upward, the lower cone sleeve 10 is separated from the anti-falling slip 1101, the anti-falling slip 1101 contracts to release the slip, the through-cable packer is released, and the lifting and lowering cable 1 is continuously lifted, so that the through-cable packer and the electric submersible pump 12 are lifted out of the casing 13.

[0087] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application. For those skilled in the art, the specific technical solutions described in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by the present application.

Claims

1. A cable packer with bidirectional clamping and sealing for cable lifting and lowering, characterized by: The invention comprises a cable sealing connection sleeve (2) and a center rod (5) which are sequentially connected in series between a lifting cable (1) and an electric submersible pump (12) from top to bottom, and an anti-top slip assembly (6), an upper cone sleeve (8), a rubber sleeve assembly (9), a lower cone sleeve (10) and a righting friction slip assembly (11) which are sequentially sleeved on the center rod (5) from top to bottom; A cable transition joint (3) is provided in the cable sealing connection tube (2); The center rod (5) is provided with an offset cable passage (510) and an eccentric oil and water passage (504). The inlet of the offset cable passage (510) is located on the upper end face of the center rod (5), and the outlet of the offset cable passage (510) is located on the lower side wall of the center rod (5). A packer cable assembly (4) is provided in the offset cable passage (510). The upper end of the packer cable assembly (4) is connected to the lower end of the lifting cable (1) through a cable transition joint (3). The lower end of the packer cable assembly (4) extends from the outlet of the offset cable passage (510) and is electrically connected to the electric submersible pump (12). A side opening (505) located above the anti-top slip body assembly (6) is provided on the side wall of the center rod (5). The side opening (505) is connected to the eccentric oil and water passage (504). The outlet of the eccentric oil and water passage (504) is located on the lower end face of the center rod (5). The anti-top-up slip assembly (6) is used to cooperate with the cone section of the upper cone sleeve (8) to prevent the cable packer from moving upward due to the top-up of the wellbore pressure; The rubber sleeve assembly (9) is used to seal the annular cavity between the central rod (5) and the sleeve (13) after it expands under pressure, so as to separate the annular cavity into upper and lower annular cavities; The straightening friction slip assembly (11) is used to cooperate with the cone section of the lower cone sleeve (10) to prevent the cable packer from falling. The straightening friction slip assembly (11) includes a guide pin (1108) adapted to a plurality of long guide rail grooves (507) and a short guide rail groove (508); the inner wall of the lower cone sleeve (10) is limited by a limit assembly provided on the side wall of the center rod (5); The side wall of the center rod (5) is provided with a plurality of long guide rail grooves (507) and a plurality of short guide rail grooves (508) adapted to the plurality of guide pins (1108); the plurality of long guide rail grooves (507) and the plurality of short guide rail grooves (508) are all arranged along the axial direction, and the lower ends are all connected through the reversing guide rail groove (509); the top heights of the plurality of long guide rail grooves (507) are higher than the top heights of the plurality of short guide rail grooves (508); the plurality of guide pins (1108) realize the axial movement of the straightening friction slip body assembly (11) through the plurality of long guide rail grooves (507) and the plurality of short guide rail grooves (508), and realize the switching between the plurality of long guide rail grooves (507) and the plurality of short guide rail grooves (508) through the reversing guide groove (509).

2. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 1, characterized in that: The anti-top slip assembly (6) comprises an anti-top slip body (601), a fixing screw, a first tongue-shaped pressure spring (603) and an anti-top slip (604); the anti-top slip body (601) is connected to the center rod (5) by a threaded connection; the upper end of the first tongue-shaped pressure spring (603) is fixed to the anti-top slip body (601) by a first fixing screw (602); the lower end of the first tongue-shaped pressure spring (603) presses the upper end of the anti-top slip (604); the cone section of the upper cone sleeve (8) extends into the lower end of the anti-top slip (604); a plurality of circumferentially evenly distributed push-off springs (7) are arranged between the upper cone sleeve (8) and the anti-top slip body (601); the upper end of each push-off spring (7) is located in a first placement hole (605) on the anti-top slip body (601), and the lower end is located in a second placement hole (801) on the upper cone sleeve (8).

3. The cable packer with bidirectional clamping and sealing function for cable lifting and lowering according to claim 2, characterized in that: An annular protrusion is provided on the side wall of the anti-top slip body (601), and a plurality of circumferentially evenly distributed grooves (606) are provided on the annular protrusion. The plurality of grooves (606) divide the annular protrusion into a protruding straightening block and a concave flow channel.

4. A cable packer with bidirectional clamping and sealing for cable lifting and lowering according to any one of claims 1 to 3, characterized in that: The straightening friction slip assembly (11) further comprises an anti-fall slip body (1109), a slip anti-fall ring (1110), a plurality of anti-fall assemblies, a plurality of friction assemblies, a protective cap (1107), and a guide pin spacer ring (1106); The anti-falling slip body (1109) is sleeved on the central rod (5), and a slip anti-slip ring (1110) and a plurality of anti-falling components are provided on the upper end of the anti-falling slip body (1109); each of the anti-falling components comprises a second tongue-shaped compression spring (1102) and an anti-falling slip (1101); the lower end of the second tongue-shaped compression spring (1102) is fixed to the upper end of the anti-falling slip body (1109) by a second fixing screw (1103) and is located in the slip anti-slip ring (1110); the upper end of the second tongue-shaped compression spring (1102) presses the lower end of the anti-falling slip (1101); a plurality of friction components are provided in the middle of the outer wall of the anti-falling slip body (1109), and each friction component comprises a mounting groove provided on the outer wall of the anti-falling slip body (1109) (1111), a bow spring (1105) arranged in the installation groove (1111), and a friction block (1104) located on the periphery of the bow spring (1105) and engaged with the edge of the installation groove (1111), the bow spring (1105) is used to apply a force away from the axis to the friction block so that the outer surface of the friction block (1104) is pressed against the inner wall of the sleeve (13); a cavity is formed between the lower end of the anti-falling slip body (1109) and the inner wall of the protective cap (1107), a guide pin spacer (1106) is arranged in the cavity, and the multiple guide pins (1108) are arranged on the inner wall of the guide pin spacer (1106), and the guide pin spacer (1106) can be driven by the guide pins (1108) to rotate circumferentially in the reversing guide groove (509).

5. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 4, characterized in that: A sealing assembly is provided at the center of the upper end face of the center rod (5) for sealing the annular cavity between the through-packer cable assembly (4) and the center rod (5); the sealing assembly comprises a cylindrical groove located at the center of the upper end face of the center rod (5), an annular pressure cap (501) threadedly connected to the cylindrical groove, and a two-half disc-shaped pressure plate (502) located between the lower end of the annular pressure cap (501) and the bottom surface of the cylindrical groove; the two-half disc-shaped pressure plate (502) is used to limit the first rubber sleeve (503) sleeved on the through-packer cable assembly (4).

6. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 5, characterized in that: The lower cone sleeve (10) comprises a positioning ring (1001) sleeved on the center rod (5) and an annular cone (1002) connected to the outside of the positioning ring (1001); a first cavity (1003) is formed between the positioning ring (1001), the annular cone (1002) and the center rod (5); an annular protrusion (506) is provided on the center rod (5), and the annular protrusion (506) can move axially in the first cavity (1003).

7. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 6, characterized in that: The rubber sleeve assembly (9) comprises an edge sealing rubber sleeve (901), a rubber sleeve spacer ring (902), a middle sealing rubber sleeve (903), a rubber sleeve spacer ring (902), and an edge sealing rubber sleeve (901) which are arranged in sequence, and the hardness of the middle sealing rubber sleeve (903) is smaller than that of the edge sealing rubber sleeve (901).

8. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 7, characterized in that: The cable transition joint (3) comprises a cable transition upper joint (301), a transition cable (302), and a cable transition lower joint (303) which are sequentially arranged between the lower end of the lifting and releasing cable (1) and the packer cable assembly (4).

9. The cable packer with bidirectional clamping and sealing for cable lifting and lowering according to claim 8, characterized in that: The packer cable assembly (4) comprises a cable assembly upper connector (401), a packer cable (402) and a cable assembly lower connector (403). The cable assembly upper connector (401) is located in the cable sealing sleeve (2) and is connected to the cable transition lower connector (303). The packer cable (402) passes through the offset cable passage (510) and extends from the outlet of the offset cable passage (510). The cable assembly lower connector (403) is electrically connected to the electric submersible pump (12).

10. A construction method using the cable lifting and releasing bidirectional clamping and sealing cable packer according to claim 1, characterized in that: The steps include: Step 1: Connecting an electric submersible pump (12), a cable packer, and a lifting cable (1) in sequence on the surface, wherein the electric submersible pump (12) and the cable packer form a tool string; Step 2: Use a crane to lift the whole formed in step 1 and place it into the well; Step 3: When lowering the lifting cable (1) and passing through the cable packer into the wellhead casing (13), ensure that the guide pin (1108) in the straightening friction slip assembly (11) is located in the short guide rail groove (508) to avoid the cable packer slip from being incorrectly seated during the well entry process; Step 4: Continue lowering the lifting cable (1) and the tool string to bring the tool string to a preset working position; Step 5: Lift and lower the lifting cable (1) according to the preset distance requirement, so that the guide pin (1108) in the straightening friction slip body assembly (11) is replaced in the long guide rail groove (507), and the lifting cable (1) is continued to be lowered. The lower cone sleeve (10) moves downward to open the anti-fall slip (1101) in the straightening friction slip body assembly (11) to press against the inner wall of the sleeve (13), and the rubber sleeve assembly (9) is compressed and expanded outward, thereby sealing the annular cavity between the rubber sleeve assembly (9) and the sleeve (13), and separating the annular cavity between the upper and lower center rods (5) of the rubber sleeve assembly (9) and the sleeve (13); Step 6: Inject water into the casing (13). The injected water enters the electric submersible pump (12) through the side opening (505) and the eccentric oil-water channel (504). The check valve in the electric submersible pump (12) prevents the water from entering the casing (13). By continuously injecting water, the casing (13) is filled with water. Step 7: Water is injected into the casing (13) from the upper part of the wellhead to pressurize the center rod (5) so that the center rod (5) continues to move downward. In contrast, under the upward push of the straightening friction slip body assembly (11) and the downward pressure of the water pressure in the casing (13), the rubber sleeve assembly (9) is further compressed, and at the same time, the upper cone sleeve (8) is pushed upward to make the anti-top slips (604) in the anti-top slip body assembly (6) clamp the inner wall of the casing (13) to prevent the tool string from moving upward due to the bottom hole pressure. Step 7: Test the tool string at the preset working pressure. The tool string must not move under the preset working pressure. Step 8: After the seal is set, the wellhead cable (1) cutting and wellhead positioning process are completed; Step 9: When checking the operation of the electric submersible pump (12) or after the operation of the electric submersible pump (12) is completed, lift the lifting cable (1) to release the jam.

Images