CN217481243U

CN217481243U - Full-diameter electronic control toe end fracturing sliding sleeve with rupture disk

Info

Publication number: CN217481243U
Application number: CN202221185140.7U
Authority: CN
Inventors: 李栋; 张雨生; 刘国永; 李勇彬; 魏荣兵
Original assignee: Puyang Donghao Mechanical & Electronic Co ltd
Current assignee: Puyang Donghao Mechanical & Electronic Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-23
Anticipated expiration: 2032-05-17

Abstract

The utility model relates to a downhole tool technical field, concretely relates to take automatically controlled toe end fracturing sliding sleeve of full latus rectum of rupture disc. The high-temperature pressure sensor and control assembly are electrically connected, a sliding sleeve is arranged in the lower connector, the lower connector is fixedly connected with the left end of the sliding sleeve through a plurality of shear pins, the sliding sleeve is hermetically connected with the lower connector, and the right end of the control nipple is fixedly and hermetically connected with the left end of the sliding sleeve through an electrolysis nipple. The utility model discloses, convenient to use, safe and reliable, before the sliding sleeve is opened, can suppress many times and open, can satisfy the requirement of operator's sleeve pipe pressure testing, can ensure that the success rate is opened to the sliding sleeve.

Description

Full-diameter electronic control toe end fracturing sliding sleeve with rupture disk

Technical Field

The utility model relates to a downhole tool technical field, concretely relates to take automatically controlled toe end fracturing sliding sleeve of full latus rectum of rupture disc.

Background

The pumping can not be carried out before the first section of the horizontal well completion operation is fractured, the perforating operation before the fracturing generally adopts coiled tubing perforating operation (TCP), but the perforating operation is limited by the length of the coiled tubing along with the gradual lengthening of the horizontal well, the perforating operation is limited in length, the risk of the first section of the perforating operation is greatly increased, and the cost is greatly increased. Therefore, the first-section sliding sleeve fracturing technology is successfully developed at home and abroad, the first-section sliding sleeve is lowered and well fixed while a casing is lowered, coiled tubing or cable perforation is not required to be lowered during the first-section fracturing, and the sliding sleeve is directly pressed and opened from a wellhead to perform fracturing, so that the construction period and the cost are saved. However, due to technical defects, the area of the sliding sleeve is poor at two ends when the sliding sleeve is opened, the shear pin is cut off after the sliding sleeve reaches the design pressure, the opening is not reliable, the requirement of an operator for casing high pressure test cannot be met, and the number of times of casing high pressure test is limited even if the sliding sleeve has a delayed opening function, so that the continuous oil pipe truck is required to be on-site standby frequently, and perforation operation is prevented when the sliding sleeve cannot be opened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a convenient to use, safe and reliable, before the sliding sleeve is opened, can suppress many times and open, can satisfy the requirement of operator's sleeve pipe pressure testing, can save high first section coiled tubing perforation expense for the customer, can still realize the automatically controlled toe end fracturing sliding sleeve of full latus rectum of taking rupture disk of fracturing operation when electrical system breaks down.

In order to realize the purpose, the utility model provides a technical scheme is:

a full-bore electronic control toe end fracturing sliding sleeve with a rupture disc comprises an upper joint, wherein the right end of the upper joint is fixedly and hermetically connected with an intermediate pipe, the right end of the intermediate pipe is fixedly and hermetically connected with a lower joint, a control short section is slidably and hermetically connected in the intermediate pipe, the left end of the control short section is in sliding and plugging connection in the upper joint, a high-temperature pressure sensor and a control assembly are fixedly embedded outside the control short section, the high-temperature pressure sensor and the control assembly are electrically connected, the sensing end of the high-temperature pressure sensor extends into a channel in the control short section, the channel is communicated with the interior of the control short section, a sliding sleeve is arranged in the lower joint, the lower joint is fixedly connected with the sliding sleeve through a plurality of shear pins, the sliding sleeve is hermetically connected with the lower joint, a plurality of strip holes are uniformly distributed on the upper circumference of the lower joint, through holes are formed in the sliding sleeve on the right side of the strip holes, the sliding sleeve seals and plugs the strip holes, the control nipple joint right-hand member passes through electrolysis nipple joint fixed connection with the sliding sleeve left end, is provided with the annular cavity between electrolysis nipple joint and the intermediate pipe, the annular cavity intussuseption is filled with electrolyte, is provided with a plurality of electrolysis assemblies and a plurality of reserve fracturing unit spare on the electrolysis nipple joint, electrolysis assembly and control assembly electric connection, the electrolysis assembly electrolysis back annular cavity and the inside intercommunication of electrolysis nipple joint.

Specifically, the electrolysis assembly is including seting up the first ladder hole on the electrolysis nipple joint, the sealed electrolysis anode subassembly of installing in the macropore of first ladder hole, install electrolysis cathode ring in the macropore of the first ladder hole in the electrolysis anode subassembly outside, the macropore female connection of the first ladder hole in the electrolysis cathode ring outside has the swivel nut, the swivel nut tightly supports electrolysis cathode ring, electrolysis anode subassembly includes electrolysis anode, electrolysis anode outside cover is equipped with the rubber layer, the outer terminal surface middle part of electrolysis anode upwards protruding and run through the rubber layer, the interior terminal surface of electrolysis anode has seted up the recess, set up the trompil with the recess intercommunication on the rubber layer, control assembly and electrolysis cathode ring and electrolysis anode electric connection, electrolyte and electrolysis anode and electrolysis cathode ring contact.

Specifically, spare fracturing unit spare is including seting up the second shoulder hole on the electrolysis nipple joint on first shoulder hole right side, and the downthehole macropore internal thread sealing connection of second shoulder has the rupture disc.

Specifically, the control assembly comprises a decoding unit, a microprocessor, a storage unit and an execution unit, wherein the decoding unit is electrically connected with the high-temperature pressure sensor, and the execution unit is electrically connected with the electrolytic anode and the electrolytic cathode ring.

Specifically, a slotted hole is formed in the middle pipe and communicated with the annular cavity, and a liquid injection plug is connected to the inner thread of the slotted hole in a sealing mode.

Specifically, high-temperature solid butter is filled in the channel, the small hole of the first stepped hole, the small hole of the second stepped hole, the groove on the inner end face of the electrolytic anode, the strip hole and the through hole.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses, convenient to use, safe and reliable, before the sliding sleeve is opened, can suppress many times and open, can satisfy the requirement of operator's sleeve pipe pressure testing, can save high first section coiled tubing perforation expense for the customer, can still realize the fracturing operation when electrical system breaks down, can ensure that the sliding sleeve opens the success rate.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is a sectional view taken along line a in fig. 1.

FIG. 3 is a schematic view of the structure of the electrolytic anode and the electrolytic cathode ring.

FIG. 4 is a three-dimensional view of an electrolysis nipple.

Figure 5 is a three-dimensional view of the sliding sleeve.

Fig. 6 is a three-dimensional view of the lower joint.

Detailed Description

As shown in fig. 1-6, a full-bore electronic control toe-end fracturing sliding sleeve with a rupture disc comprises an upper joint 1, wherein the right end of the upper joint 1 is fixedly and hermetically connected with a middle pipe 17, the right end of the middle pipe 17 is fixedly and hermetically connected with a lower joint 22, the middle pipe 17 is slidably and hermetically connected with a control short section 3, the left end of the control short section 3 is slidably and hermetically inserted in the upper joint 1, a high-temperature pressure sensor 6 and a control assembly 5 are fixedly embedded outside the control short section 3, the high-temperature pressure sensor 6 is electrically connected with the control assembly 5, the sensing end of the high-temperature pressure sensor 6 extends into a channel 7 in the control short section 3, the channel 7 is communicated with the interior of the control short section 3, a sliding sleeve 21 is arranged in the lower joint 22, the lower joint 22 is fixedly connected with the sliding sleeve 21 through a plurality of shear pins 20, the sliding sleeve 21 is hermetically connected with the lower joint 22, a plurality of long holes 19 are uniformly distributed on the circumference of the lower joint 22, through-hole 16 has all been seted up on the sliding sleeve 21 on rectangular hole 19 right side, and sliding sleeve 21 seals up rectangular hole 19, and lower clutch 22 seals up through-

hole

16, and 3 right-hand members of control nipple joint and sliding sleeve 21 left end pass through electrolysis nipple joint 13 fixed connection, are provided with the ring cavity between electrolysis nipple joint 13 and the intermediate tube 7, the ring cavity intussuseption is filled with electrolyte 18, set up the slotted hole on the intermediate tube 17, slotted hole and ring cavity intercommunication, slotted hole thread sealing connection have annotate liquid stopper 15, are provided with a plurality of electrolysis assemblies and a plurality of reserve fracturing unit on the electrolysis nipple joint 13, electrolysis assembly and control assembly electric connection, the ring cavity and the inside intercommunication of electrolysis nipple joint 13 after the electrolysis of electrolysis assembly.

The electrolysis assembly is including offering the first step hole 2 on electrolysis nipple 13, the sealed installation has electrolysis anode assembly in the macropore of first step hole 2, install electrolysis cathode ring 9 in the macropore of the first step hole 2 in the electrolysis anode assembly outside, the macropore female connection of the first step hole 2 in the electrolysis cathode ring 9 outside has swivel nut 14, swivel nut 14 tightly supports electrolysis cathode ring 9, electrolysis anode assembly includes electrolysis

positive pole

8, 8 outside covers of electrolysis positive pole are equipped with

rubber layer

10, 8 outer terminal surface middle parts of electrolysis positive pole are upwards protruding and run through rubber layer 10, seted up the recess on the interior terminal surface of electrolysis positive pole 8, set up the trompil 11 with the recess intercommunication on the rubber layer 10, control assembly 5 and

electrolysis cathode ring

9 and 8 electric connection of electrolysis positive pole, electrolyte 18 and electrolysis positive pole 8 and the contact of electrolysis cathode ring 9. The control assembly 5 comprises a decoding unit, a microprocessor, a storage unit and an execution unit, wherein the decoding unit is electrically connected with the high-temperature pressure sensor 6, and the execution unit is electrically connected with the electrolytic anode 8 and the electrolytic cathode ring 9.

The standby fracturing assembly comprises a second stepped hole 4 arranged on an electrolytic nipple 13 on the right side of the first stepped hole 2, and a large-hole internal thread in the second stepped hole 4 is hermetically connected with a rupture disc 12.

All pack in the aperture of passageway 7, first stepped hole 2, the aperture of second stepped hole 4, the recess of the terminal surface in electrolysis positive pole 8, rectangular hole 19 and the through-hole 16 has high-temperature solid butter, consequently, during the well cementation, when cement flows through this automatically controlled toe end fracturing sliding sleeve, can prevent that cement from being preserved in the aperture of passageway 7, first stepped hole 2, the aperture of second stepped hole 4, the recess of the terminal surface in electrolysis positive pole 8, rectangular hole 19 and through-hole 16, prevent to be blocked by cement.

Before the tool is installed, an activation program is written into a storage unit of the control assembly 5, the activation program is a retrieval pressure pulse instruction and is generally written into a high-low voltage value and a high-low pulse frequency within a certain time length, after the activation requirement is met, the activation program enables an execution unit in the control assembly 5 to supply power to the electrolysis assembly, and under the premise that the activation requirement is not met, an operator can carry out infinite casing pressure tests.

The full-bore electronic control toe end fracturing sliding sleeve with a rupture disc is used as a first-stage fracturing sliding sleeve and is put into a well together with a casing for well cementation operation, a high-temperature pressure sensor 6 detects the pressure in a shaft in real time through a channel 7 in a control short section 3, before fracturing construction, a pump truck is used for pressurization and pressure relief operation, pressure pulses with certain rules are generated in the shaft, the high-temperature pressure sensor 6 recognizes the pressure pulses and converts the pressure pulses into electric signals and transmits the electric signals to a decoding unit of a control assembly 5 for decoding, the decoded information is analyzed by a microprocessor in the control assembly 5, when the pressure pulse frequency is greater than or equal to a set value, the microprocessor enables an execution unit to supply power to an electrolysis assembly, namely an electrolysis anode 8 and an electrolysis cathode ring 9 are electrified, under the action of an electrolyte 18, an electrolysis anode 8 which plays a pressure bearing role is punctured by electrolysis, fracturing fluid enters an annular cavity through a first stepped hole 2, the pressure in the annular cavity rises, and after sliding sleeve 21 sheared shear pin 20, sliding sleeve 21, control nipple 3 and electrolysis nipple 13 moved to the left side, and after rectangular hole 19 and through-hole 16 communicate, this toe end fracturing sliding sleeve was opened.

Gas can be generated in the electrolytic process of the electrolytic anode 8 and the electrolytic cathode ring 9, and the pressure in the annular cavity caused by the gas is increased, wherein the pressure is beneficial pressure and can assist the sliding sleeve 21 in opening.

When the electric control system fails, high voltage is applied to the inside of the shaft, and after any rupture disk 12 is broken down, the sliding sleeve 21 can enable the shear pin 20 to move to the left side after being sheared, so that the success rate of opening the sliding sleeve 21 can be ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A full-diameter electric control toe end fracturing sliding sleeve with a rupture disk comprises an upper joint, wherein the right end of the upper joint is fixedly and hermetically connected with an intermediate pipe, the right end of the intermediate pipe is fixedly and hermetically connected with a lower joint, the full-diameter electric control toe end fracturing sliding sleeve is characterized in that a control short section is slidably and hermetically connected in the intermediate pipe, the left end of the control short section is slidably and hermetically inserted in the upper joint, a high-temperature pressure sensor and a control assembly are fixedly embedded outside the control short section, the high-temperature pressure sensor is electrically connected with the control assembly, a sensing end of the high-temperature pressure sensor extends into a channel in the control short section, the channel is communicated with the interior of the control short section, a sliding sleeve is arranged in the lower joint, the lower joint is fixedly connected with the sliding sleeve through a plurality of shear nails, the sliding sleeve is hermetically connected with the lower joint, a plurality of elongated holes are uniformly distributed on the circumference of the lower joint, through holes are formed in the sliding sleeve on the right side of the elongated holes, and the sliding sleeve seals and seals the elongated holes, the lower connector seals the through hole and blocks, and control nipple joint right-hand member passes through electrolysis nipple joint fixed connection with the sliding sleeve left end, is provided with the annular cavity between electrolysis nipple joint and the intermediate tube, the annular cavity intussuseption is filled with electrolyte, is provided with a plurality of electrolysis assemblies and a plurality of reserve fracturing components on the electrolysis nipple joint, electrolysis assembly and control assembly electric connection, electrolysis assembly electrolysis back annular cavity and the inside intercommunication of electrolysis nipple joint.

2. The full-bore electrically controlled toe-end fracturing sliding sleeve with rupture disk of claim 1, the electrolysis assembly is including seting up the first ladder hole on the electrolysis nipple joint, the sealed electrolysis anode subassembly of installing in the macropore of first ladder hole, install electrolysis cathode ring in the macropore of the first ladder hole in the electrolysis anode subassembly outside, the macropore internal thread of the first ladder hole in the electrolysis cathode ring outside has the swivel nut, the swivel nut tightly supports electrolysis cathode ring, the electrolysis anode subassembly includes electrolysis positive pole, electrolysis positive pole outside cover is equipped with the rubber layer, the outer terminal surface middle part of electrolysis positive pole upwards protruding and run through the rubber layer, seted up the recess on the interior terminal surface of electrolysis positive pole, set up the trompil with the recess intercommunication on the rubber layer, control assembly and electrolysis cathode ring and electrolysis positive pole electric connection, electrolyte and electrolysis positive pole and electrolysis cathode ring contact.

3. The full-bore electronic control toe end fracturing sliding sleeve with the rupture disc as claimed in claim 2, wherein the standby fracturing assembly comprises a second stepped hole which is arranged on the electrolysis short section on the right side of the first stepped hole, and the rupture disc is connected with the large-hole internal thread in the second stepped hole in a sealing mode.

4. The full-bore electrically controlled toe fracturing sliding sleeve with rupture disc of claim 2, wherein said control assembly comprises a decoding unit, a microprocessor, a storage unit and an execution unit, wherein the decoding unit is electrically connected with the high temperature pressure sensor, and the execution unit is electrically connected with the electrolytic anode and the electrolytic cathode ring.

5. The full-diameter electronic control toe-end fracturing sliding sleeve with the rupture disc as claimed in claim 1, wherein the middle pipe is provided with a slotted hole, the slotted hole is communicated with the annular cavity, and a liquid filling plug is connected to the internal thread of the slotted hole in a sealing manner.

6. The full-bore electronic control toe end fracturing sliding sleeve with the rupture disk as claimed in claim 3, wherein the channel, the small hole of the first stepped hole, the small hole of the second stepped hole, the groove of the inner end face of the electrolytic anode, the strip hole and the through hole are filled with high-temperature solid butter.