Cable transmission clustering perforation operation explosion jam release method

Abstract

The invention discloses a cable transmission clustering perforation operation explosion jam release method, comprising the following steps: a, connecting a fishing spear, an added weight, a magnetic locator, a crossover coupling, an electromechanical release device, a multi-level perforation gun string and a bridge plug tool in sequence, connecting a pipe string with a cable, and descending the pipe string in a well; b, if blockage occurs in a construction process, releasing the perforation gun string, sending an electric signal to an ignition selection block, and detonating a detonator and a detonating fuse in the electromechanical release device, so that a weak point on a weak point exploding rod is broken by exploding and well liquid enters an inner cavity of the electromechanical release device by a through hole in an exploding bypass,; pushing a piston to move downward, and withdrawing a claw end of an out-of-hand elastic claw, so that a release sleeve is released together with the perforation gun string under the action of the self gravity of the pipe string or the tensile force of the external cable, and jam release is realized. The weak point tensile force of the cable can be increased, the weight of the cable and a tool string in the well is enabled ensured not to be less than wellhead pressure load in case of jam lease, and the safety of the cable is ensured.

Description

technical field

[0001] The invention relates to a cable-transported clustered perforation operation explosive jam release method, which belongs to the technical field of conventional and unconventional oil and gas well development. Background technique

[0002] Clustered perforation technology has been widely used in the exploration and development of unconventional oil and gas reservoirs. This technology requires wellhead pressure operation, and the weight of the running string needs to be increased during operation to ensure that the string can run in the vertical well section by its own weight. run.

[0003] During the operation of vertical wells and horizontal wells with complex well conditions, on the one hand, the casing of vertical wells is deformed, or the formation of sand, chemical sediment precipitation, wellbore deformation, and irregular wellbore trajectory, etc. Reasons, on the other hand, when the cable is set to seal the bridge plug, the weak point is not ou...

Examples

Embodiment 1

[0031] A cable-transported cluster perforation operation explosive release method, comprising the following steps:

[0032] a. Connect the fishing head 2, the weight 3, the magnetic locator 4, the conversion joint 5, the electromechanical release device 6, the multi-stage perforating gun string 7 and the bridge plug tool 8 in sequence, and the connected pipe string is connected with the cable 1, go down the well;

[0033] b. If the perforating gun string needs to be discarded during the construction process, an electric signal is sent to the firing block 9 to detonate the detonator 10 and the detonating cord 11 in the electromechanical throwing device 6, so that the weak point on the weak point explosive rod 12 is blown off , the well fluid enters the inner cavity of the electromechanical throwing device 6 through the through hole on the explosion bypass 13, pushes the piston rod 16 to move downward, and recovers the claw end of the throwing claw 15, and the throwing sleeve 18...

Embodiment 2

[0043] Such as figure 2 As shown, the assembly steps of the electromechanical throwing device in the present invention are as follows: 1) Connect one end of the throwing claw 15 to the explosion bypass 13, and the other end to the claw jacket 17; 2) Press one end of the throwing sleeve 18 3) Press the sealed wire column 14 into the piston rod 16, pull out the wires at both ends, and then press into the throwing sleeve 18 until it enters the inner cavity of the claw cover 17; 4) Connect with the first stage The relay sub-joint 19 connected with the perforating gun; 5) connect the selection block 9, the detonator 10 and the detonating cord 11, and then connect with the lead wire at one end of the sealed wire column 14, insert the weak point explosive rod 12, and finally install it as a whole into the side of the explosion Pass 13.

[0044] The specific implementation steps of the explosive release of jamming hands during cable conveying cluster perforating operations: 1) Conne...

Embodiment 3

[0046] The electromechanical device for throwing hands among the present invention comprises weak point explosive rod 12, explosion bypass 13, piston rod 16, insulating sealing plug, bullet claw 15, throwing gloves sleeve 18 and gun string connection joint.

[0047] Design ring-shaped weak points and through holes on the weak point explosive rod 12. The weak point explosive rod 12 has built-in pyrotechnics and wires. The rod 12 is placed inside the explosion bypass 13, and the weak point of the explosion rod 12 has the function of resisting pressure of 105MPa.

[0048] Explosion bypass 13 has 4 through holes in the annular design, and the position of the annular weak point is exactly the same as that of the through holes. One end of the female button is connected to the ignition head; the insulating sealing plug has the function of insulating the movable piston rod 16, and can realize normal power supply and signal transmission. Be installed on movable piston rod 16 upper ends...

technical field

[0001] The invention relates to a cable-transported clustered perforation operation explosive jam release method, which belongs to the technical field of conventional and unconventional oil and gas well development. Background technique

[0002] Clustered perforation technology has been widely used in the exploration and development of unconventional oil and gas reservoirs. This technology requires wellhead pressure operation, and the weight of the running string needs to be increased during operation to ensure that the string can run in the vertical well section by its own weight. run.

[0003] During the operation of vertical wells and horizontal wells with complex well conditions, on the one hand, the casing of vertical wells is deformed, or the formation of sand, chemical sediment precipitation, wellbore deformation, and irregular wellbore trajectory, etc. Reasons, on the other hand, when the cable is set to seal the bridge plug, the weak point is not ou...

Examples

Embodiment 1

[0031] A cable-transported cluster perforation operation explosive release method, comprising the following steps:

[0032] a. Connect the fishing head 2, the weight 3, the magnetic locator 4, the conversion joint 5, the electromechanical release device 6, the multi-stage perforating gun string 7 and the bridge plug tool 8 in sequence, and the connected pipe string is connected with the cable 1, go down the well;

[0033] b. If the perforating gun string needs to be discarded during the construction process, an electric signal is sent to the firing block 9 to detonate the detonator 10 and the detonating cord 11 in the electromechanical throwing device 6, so that the weak point on the weak point explosive rod 12 is blown off , the well fluid enters the inner cavity of the electromechanical throwing device 6 through the through hole on the explosion bypass 13, pushes the piston rod 16 to move downward, and recovers the claw end of the throwing claw 15, and the throwing sleeve 18...

Embodiment 2

[0043] Such as figure 2 As shown, the assembly steps of the electromechanical throwing device in the present invention are as follows: 1) Connect one end of the throwing claw 15 to the explosion bypass 13, and the other end to the claw jacket 17; 2) Press one end of the throwing sleeve 18 3) Press the sealed wire column 14 into the piston rod 16, pull out the wires at both ends, and then press into the throwing sleeve 18 until it enters the inner cavity of the claw cover 17; 4) Connect with the first stage The relay sub-joint 19 connected with the perforating gun; 5) connect the selection block 9, the detonator 10 and the detonating cord 11, and then connect with the lead wire at one end of the sealed wire column 14, insert the weak point explosive rod 12, and finally install it as a whole into the side of the explosion Pass 13.

[0044] The specific implementation steps of the explosive release of jamming hands during cable conveying cluster perforating operations: 1) Conne...

Embodiment 3

[0046] The electromechanical device for throwing hands among the present invention comprises weak point explosive rod 12, explosion bypass 13, piston rod 16, insulating sealing plug, bullet claw 15, throwing gloves sleeve 18 and gun string connection joint.

[0047] Design ring-shaped weak points and through holes on the weak point explosive rod 12. The weak point explosive rod 12 has built-in pyrotechnics and wires. The rod 12 is placed inside the explosion bypass 13, and the weak point of the explosion rod 12 has the function of resisting pressure of 105MPa.

[0048] Explosion bypass 13 has 4 through holes in the annular design, and the position of the annular weak point is exactly the same as that of the through holes. One end of the female button is connected to the ignition head; the insulating sealing plug has the function of insulating the movable piston rod 16, and can realize normal power supply and signal transmission. Be installed on movable piston rod 16 upper ends...

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