CN113605859B - Well cementation sliding sleeve system, using method, well cementation sliding sleeve assembling method and maintenance method - Google Patents
Well cementation sliding sleeve system, using method, well cementation sliding sleeve assembling method and maintenance method Download PDFInfo
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- CN113605859B CN113605859B CN202111078758.3A CN202111078758A CN113605859B CN 113605859 B CN113605859 B CN 113605859B CN 202111078758 A CN202111078758 A CN 202111078758A CN 113605859 B CN113605859 B CN 113605859B
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012423 maintenance Methods 0.000 title claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims abstract description 5
- 235000014121 butter Nutrition 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract 3
- 239000012530 fluid Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 210000000707 wrist Anatomy 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
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Abstract
The application provides a well cementation sliding sleeve system and a using method thereof, a well cementation sliding sleeve assembling method and a maintenance method, wherein the using method comprises the following steps: (1) The well cementation sliding sleeve is set into the design depth of the shaft according to the operation requirement; (2) After the well cementation is finished, opening the toe end sliding sleeve and fracturing; (3) After fracturing, putting a first layer of well cementation sliding sleeve soluble bridge plug, when the soluble bridge plug reaches the position of the first layer of well cementation sliding sleeve, putting for 20-40 m, if an extraction reaction exists, stopping extraction within 0.5T of over-extraction of the hanging weight, and correcting the depth; (4) Thirdly, igniting and setting the soluble bridge plug after confirming that the depth is correct, and pulling out the setting tool and the cable; (5) Starting a pump to reach the opening pressure of the well cementation sliding sleeve and observing the change of the pressure of the pump, wherein the fracturing construction of the layer can be started at the moment when the sliding sleeve is opened and if the pressure of the pump has an instant pressure drop display; the perforation operation is avoided, the fracturing step is reduced, the service life of the sleeve is prolonged, the sleeve is prevented from deforming or even breaking, the damage of parts is avoided, and the maintenance is convenient.
Description
Technical Field
The invention relates to the technical field of oil and gas field drilling, in particular to a well cementation sliding sleeve system and a using method thereof, a well cementation sliding sleeve assembling method and a maintenance method.
Background
At present, petroleum, shale gas, natural gas and the like are developed by fracturing underground to be exploited, a casing perforation technology is generally adopted at present, but the technology can cause the casing strength to be reduced, and large-scale hydraulic fracturing can cause casing deformation in a long-term production process, so that the normal operation of oil-gas production is influenced; the well cementation sliding sleeve is designed aiming at the problems, and provides great improvement for the existing production process, but the existing well cementation sliding sleeve generally needs the matching of a bottom packer and a soluble bridge plug, is only suitable for oil and gas fields with lower formation pressure coefficients, and cannot be used in a continuous oil pipe.
Disclosure of Invention
In view of the defects of the related prior art, the application provides a well cementation sliding sleeve system, a using method, a well cementation sliding sleeve assembling method and a maintenance method, the well cementation sliding sleeve system is not influenced by a formation pressure coefficient, and can be used in a continuous oil pipe, the universality is greatly improved, meanwhile, the participation of a bottom packer is not needed, the structure is simplified, the fracturing step is reduced, and the practicability is high.
In order to achieve the above object, the present invention employs the following techniques:
a well cementation sliding sleeve system, comprising: the device comprises an outer sleeve, an inner sleeve, a sliding sleeve, a joint, a soluble bridge plug and a positioner.
The inner sleeve is arranged in the outer sleeve, at least one part of one end of the inner sleeve is positioned on the outer side of the outer sleeve, the outer wall of one end of the inner sleeve is in a step shape, the steps are three in number, first pressure transfer holes with uniform intervals are arranged on the side surface of the first step of the inner sleeve, two second ring grooves are arranged on the second step from the center of the inner sleeve to the outside, and second pressure transfer holes with uniform intervals are arranged at the other end of the inner sleeve; the outer wall of the inner sleeve is provided with a first ring groove, the first ring groove is close to the first step side surface of the inner sleeve, a part of the other end of the inner sleeve protrudes outwards to form a convex part, and the convex part is provided with two third ring grooves along the circumferential direction;
furthermore, at least one sliding sleeve is sleeved on the inner sleeve, when a plurality of sliding sleeves are arranged, the sliding sleeves are arranged adjacently and are integrally positioned in the outer sleeve, the outer wall of each sliding sleeve is matched with the inner wall of the outer sleeve, fifth ring grooves are formed in the inner walls of the two ends of each sliding sleeve along the circumferential direction, sixth ring grooves are formed in one side of each fifth ring groove and are positioned on the outer wall of each sliding sleeve, one sixth ring groove is close to the center of each sliding sleeve, the other sixth ring groove is close to the end face of each sliding sleeve, and an installation hole is formed in one side of each sixth ring groove, which is close to the end face of each sliding sleeve;
furthermore, the joint is arranged at one end of the outer sleeve, at least one part of one end of the joint is positioned in the outer sleeve and between the inner sleeve and the outer sleeve, two ends of the joint are both inwards sunken to form concave parts, and the outer wall of one concave part is provided with two fourth ring grooves;
further, a locator is secured to an end of the soluble bridge plug and, in use, is disposed within the inner sleeve with the soluble bridge plug, the locator being adapted to define a position of the soluble bridge plug within the inner sleeve.
A well cementation sliding sleeve assembling method comprises the following steps:
the method comprises the following steps: the inner sleeve is placed on the bench clamp and fixed;
step two: marking in a first ring groove of the inner sleeve by using a white mark pen;
step three: checking whether a first pressure transmission hole and a second pressure transmission hole on the inner sleeve are smooth or not;
step four: a layer of butter is evenly coated on the inner sleeve;
step five: an O-shaped ring coated with butter is arranged in one of the second ring grooves on the inner sleeve and one of the third ring grooves on the convex part;
step six: coating grease on the O-shaped ring on the sliding sleeve and installing the O-shaped ring in the fifth ring groove and the sixth ring groove;
step seven: grease is uniformly coated inside the sliding sleeve;
step eight: moving the sliding sleeve upwards from the bottom of the inner sleeve to a stepped limiting position at the top of the inner sleeve;
step nine: observing and confirming the marked place of the marker pen in the first ring groove of the inner sleeve through the mounting hole of the sliding sleeve, and mounting uniformly distributed shearing pins in the mounting hole according to construction requirements to ensure that the shearing force borne by the pins is uniform when the pins are sheared;
step ten: uniformly coating butter/thread oil on the ACME thread part of the inner sleeve;
step eleven: the outer sleeve is installed and fixed from the bottom of the inner sleeve upwards.
Further, the number of the shear pins to be installed in the step ten is 6~8.
A well cementation sliding sleeve maintenance method comprises the following steps:
the method comprises the following steps: placing the end part of the inner sleeve of the well cementation sliding sleeve on a bench clamp and fixing;
step two: taking out the positioning steel pin connected with the joint and the inner sleeve by using an inner hexagonal;
step three: detaching the bottom of the joint from the position between the inner sleeve and the outer sleeve by using 36' pipe tongs;
step four: taking out the O-shaped ring in the fourth ring groove of the joint;
step five: taking out the positioning pin of the outer sleeve by using an inner hexagon;
step six: the outer sleeve is taken down from the inner sleeve by chain tongs;
step seven: cleaning the sliding sleeve and the inner sleeve;
step eight: taking out the shearing pin on the sliding sleeve by using a screwdriver;
step nine: detaching the slave sliding sleeve from the inner sleeve by using chain tongs;
step ten: removing all O-shaped rings on the sliding sleeve;
step eleven: cleaning the inner sleeve and removing all O-shaped rings on the inner sleeve;
step twelve: and removing the inner sleeve from the bench clamp.
Furthermore, the number of the positioning pins in the second step is 8.
A method for using a well cementation sliding sleeve system comprises the following steps:
the method comprises the following steps: the toe end sliding sleeve and the well cementation sliding sleeve are lowered into the shaft according to the design depth of the operation requirement;
step two: after the well cementation is finished, opening the toe end sliding sleeve and performing fracturing operation;
step three: after fracturing is finished, putting a soluble bridge plug into the first layer of well cementation sliding sleeve, when the soluble bridge plug reaches the position of the first layer of well cementation sliding sleeve, putting 20 to 40 meters in more, reversely lifting the well cementation sliding sleeve, measuring the reverse lifting hanging weight, and when the soluble bridge plug is close to the position of the first layer of well cementation sliding sleeve, if an over-lifting reaction exists, stopping over-lifting within 0.5T of over-lifting of the hanging weight, and correcting the depth;
step four: step three, after the depth is confirmed to be correct, igniting, setting the soluble bridge plug, and pulling out the setting tool and the cable;
step four: starting a pump to reach the opening pressure of the well cementation sliding sleeve and observing the change of the pressure of the pump, wherein the fracturing construction of the layer can be started at the moment when the sliding sleeve is opened and if the pressure of the pump has an instant pressure drop display;
step six: and performing fracturing construction operation layer by layer according to the steps from the first step to the fifth step.
Further, the correction depth is equal to the design depth.
Further, the back weight is equal to the weight in the casing plus the weight of the locator.
Further, the setting tool is a Beck 20 setting tool or a hydraulic setting device, and before the setting tool enters the well, the stress of the well cementation sliding sleeve is balanced.
The invention has the beneficial effects that: the well cementation sliding sleeve is activated by fluid pressure, and fluid holes are opened by controlling the fluid pressure, so that fluid flows into an underground target layer from a well casing, perforation operation is avoided, fracturing steps in the construction process are reduced, and the service life of the casing is greatly prolonged; the number of times of the sleeve subjected to pressure is reduced due to the reduction of the fracturing step, so that the phenomena of deformation, even breakage and the like of the sleeve caused by overlarge pressure are prevented to the maximum extent; the well cementation sliding sleeve has a simple assembly mode, can greatly avoid the damage of parts caused by assembly errors in the assembly process, and reduces the resource waste; and after the assembly is completed, if a problem is found, the well cementation sliding sleeve can be disassembled, parts are replaced, and the maintenance is convenient.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic cross-sectional view of the overall structure of an embodiment of the present application.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
Fig. 3 is an enlarged schematic view of fig. 1 at B.
Fig. 4 is an enlarged schematic view of fig. 1 at C.
Fig. 5 is a schematic perspective view of a cross-sectional structure of an inner sleeve according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
As shown in fig. 1 to 5, the present embodiment provides a well cementation sliding sleeve system, which comprises an outer sleeve 1, an inner sleeve 2, a sliding sleeve 3, a joint 4, a soluble bridge plug 5 and a locator 6.
The inner sleeve 2 is arranged in the outer sleeve 1, at least one part of one end of the inner sleeve 2 is positioned outside the outer sleeve 1, the outer wall of one end of the inner sleeve 2 is in a step shape, the steps are three in number, first pressure transmission holes 21 with uniform intervals are arranged on the side surface of the first step of the inner sleeve 2, two second ring grooves 23 are arranged on the second step from the center of the inner sleeve 2 to the outside, and second pressure transmission holes 24 with uniform intervals are arranged at the other end of the inner sleeve 2; a first ring groove 22 is formed in the outer wall of the inner sleeve 2, the first ring groove 22 is close to the first step side face of the inner sleeve 2, a part of the other end of the inner sleeve 2 protrudes outwards to form a convex part 25, and two third ring grooves 26 are formed in the convex part 25 in the circumferential direction;
specifically, at least one sliding sleeve 3 is sleeved on the inner sleeve 2, when a plurality of sliding sleeves 3 are arranged, the sliding sleeves 3 are arranged adjacently and are integrally positioned in the outer sleeve 1, the outer wall of each sliding sleeve 3 is matched with the inner wall of the outer sleeve 1, the inner walls at two ends of each sliding sleeve 3 are provided with fifth annular grooves 31 along the circumferential direction, one side of each fifth annular groove 31 is provided with a sixth annular groove 32, each sixth annular groove 32 is positioned on the outer wall of each sliding sleeve 3, one sixth annular groove 32 is close to the center of each sliding sleeve 3, the other sixth annular groove 32 is close to the end face of each sliding sleeve 3, and one sixth annular groove 32 is provided with a mounting hole 33 at one side close to the end face of each sliding sleeve 3;
specifically, the joint 4 is arranged at one end of the outer sleeve 1, at least one part of one end of the joint 4 is arranged in the outer sleeve 1 and is arranged between the inner sleeve 2 and the outer sleeve 1, two ends of the joint 4 are both inwards recessed to form concave portions 41, and two fourth ring grooves 42 are arranged on the outer wall of one concave portion 4;
specifically, a locator 6 is secured to one end of the soluble bridge plug 5 and, in use, is disposed within the inner housing 2 along with the soluble bridge plug 5, the locator 6 serving to define the position of the soluble bridge plug 5 within the inner housing 2.
A well cementation sliding sleeve assembling method comprises the following steps:
the method comprises the following steps: the inner sleeve 2 is placed on the bench clamp and fixed;
step two: marking in the first ring groove 22 of the inner sleeve 2 by using a white mark pen;
step three: checking whether the first pressure transmission hole 21 on the inner sleeve 2 is unobstructed;
step four: a layer of butter is evenly smeared on the inner sleeve 2;
step five: installing butter-smeared O-shaped rings in one of the second ring grooves 23 on the inner sleeve 2 and one of the third ring grooves 26 on the convex part 25;
step six: coating grease on the O-shaped ring on the sliding sleeve 3 and installing the O-shaped ring in the fifth ring groove 31 and the sixth ring groove 32;
step seven: grease is uniformly smeared inside the sliding sleeve 3;
step eight: moving the sliding sleeve 3 upwards from the bottom of the inner sleeve 2 to a step limiting position at the top of the inner sleeve 2;
step nine: observing and confirming the mark place of the marker in the first ring groove 22 of the inner sleeve 2 through the mounting hole 33 of the sliding sleeve 3, and mounting uniformly distributed shearing pins in the mounting hole 33 according to construction requirements to ensure that the shearing force borne by the pins is uniform when the pins are sheared;
step ten: the inner sleeve 2ACME screw thread part is evenly coated with butter/screw thread oil;
step eleven: the outer sleeve 1 is loaded and fixed from the bottom of the inner sleeve 2 upwards.
Specifically, the number of shear pins to be installed in the step ten is 6~8.
A well cementation sliding sleeve maintenance method comprises the following steps:
the method comprises the following steps: placing the end part of the inner sleeve 2 of the well cementation sliding sleeve on a bench clamp and fixing;
step two: taking out the positioning pin connected with the joint 4 and the inner sleeve 2 by using an inner hexagonal;
step three: detaching the bottom of the joint 4 from the position between the inner sleeve 2 and the outer sleeve 1 by using 36' pipe tongs;
step four: removing the O-ring in the fourth ring groove 42 of the joint 4;
step five: taking out the positioning pin of the outer sleeve 1 by using an inner hexagon;
step six: the outer sleeve 1 is taken down from the inner sleeve 2 by chain tongs;
step seven: cleaning the sliding sleeve 3 and the inner sleeve 2;
step eight: taking out the shearing pin on the sliding sleeve 3 by using a screwdriver;
step nine: the slave sliding sleeve 3 is detached from the inner sleeve 2 by chain tongs;
step ten: removing all O-shaped rings on the sliding sleeve 3;
step eleven: cleaning the inner sleeve 2 and removing all O-shaped rings on the inner sleeve 2;
step twelve: the inner sleeve 2 is removed from the vise.
Specifically, the number of the positioning pins in the second step is 8.
A method for using a well cementation sliding sleeve system comprises the following steps:
the method comprises the following steps: the toe end sliding sleeve and the well cementation sliding sleeve are set to the designed depth in the shaft according to the operation requirement;
step two: after the well cementation is finished, opening the toe end sliding sleeve and fracturing;
step three: after fracturing is finished, putting a soluble bridge plug 5 into the first layer of well cementation sliding sleeve, when the soluble bridge plug 5 reaches the position of the first layer of well cementation sliding sleeve, putting 20-40 m more, lifting the well cementation sliding sleeve backwards, measuring the lifting suspension weight, and when the soluble bridge plug 5 is close to the position of the first layer of well cementation sliding sleeve, if an over-lifting reaction exists, stopping over-lifting within 0.5T of over-lifting suspension weight, and correcting the depth;
step four: thirdly, igniting and setting the soluble bridge plug 5 after confirming that the depth is correct, and pulling out the setting tool and the cable;
step five: the pump is started to pump to reach the opening pressure of the well cementation sliding sleeve and the change of the pump pressure is observed, the fracturing construction of the layer can be started if the instantaneous pressure drop display of the pump pressure exists at the opening moment of the sliding sleeve 3;
step six: and performing fracturing construction operation layer by layer according to the steps from the first step to the fifth step.
Specifically, the correction depth is equal to the design depth.
Specifically, the back weight is equal to the weight inside the casing plus the weight of the positioner 6.
Specifically, the setting tool is a Beck 20 setting tool or a hydraulic setting device, and before the setting tool enters the well, the stress of the well cementation sliding sleeve is balanced.
Specific embodiments are described below:
firstly, an inner sleeve 2 is placed on bench vice and fixed, a mark is made in a first ring groove 22 of the inner sleeve 2 by using a white mark pen, whether a first pressure transmission hole 21 on the inner sleeve 2 is smooth is checked, a layer of butter is evenly smeared on the inner sleeve 2, an O-shaped ring smeared with the butter is installed in one second ring groove 23 on the inner sleeve 2 and one third ring groove 26 on a convex part 25, the O-shaped ring on a sliding sleeve 3 is smeared with the butter and installed in a fifth ring groove 31 and a sixth ring groove 32, the butter is evenly smeared in the sliding sleeve 3, the sliding sleeve 3 is moved upwards from the bottom of the inner sleeve 2 to the top step limiting part of the inner sleeve 2, the mark place of the mark in the first ring groove 22 of the inner sleeve 2 is observed and confirmed through an installation hole 33 of the sliding sleeve 3, 6~8 evenly distributed shear pins are installed in an installation hole 33 according to the construction requirement, the shear force borne by the pins is ensured to be even when the pins are sheared, ACME screw thread part of the inner sleeve 2 is evenly smeared with the butter or the screw thread part, and the outer sleeve 1 is upwards loaded into the inner sleeve 2 and fixed;
if the well cementation sliding sleeve is found to have problems after the assembly is completed, the treatment of the maintenance process can be carried out, or the end part of an inner sleeve 2 of the well cementation sliding sleeve is placed on a bench vice and fixed, 8 positioning pins for connecting a joint 4 with the inner sleeve 2 are taken out by an inner hexagonal wrench, the bottom of the joint 4 is taken out from between the inner sleeve 2 and an outer sleeve 1 by a 36-inch pipe vice, an O-shaped ring in a fourth ring groove 42 of the joint 4 is taken out, the positioning pins of the outer sleeve 1 are taken out by the inner hexagonal wrench, the outer sleeve 1 is taken off from the inner sleeve 2 by a chain vice, the sliding sleeve 3 and the inner sleeve 2 are cleaned, a shearing pin on the sliding sleeve 3 is taken out by a screwdriver, the sliding sleeve 3 is taken off from the inner sleeve 2 by the chain vice, all O-shaped rings on the sliding sleeve 3 are removed, the inner sleeve 2 is cleaned, all the O-shaped rings on the inner sleeve 2 are removed, and the inner sleeve 2 is taken off from the bench vice;
when a well cementation sliding sleeve is required to be used for operation, the well cementation sliding sleeve and the toe end sliding sleeve are lowered into the designed depth of a shaft according to the operation requirement, after the well cementation is finished, the toe end sliding sleeve is opened and fracturing is carried out, after the fracturing is finished, the soluble bridge plug 5 is connected with the positioner 6, then the soluble bridge plug 5 is placed into the first layer of well cementation sliding sleeve, the soluble bridge plug 5 and the positioner 6 are ignited to be seated through a setting tool, and meanwhile hydraulic setting can also be used;
when the soluble bridge plug 5 reaches the fourth annular groove 42 of the joint 4 of the first layer of well cementation sliding sleeve, putting 20-40 m more, lifting the well cementation sliding sleeve reversely, measuring the lifting overhang, when the soluble bridge plug 5 is close to the position of the first layer of well cementation sliding sleeve, stopping lifting within 0.5T of lifting overhang if a lifting reaction exists, correcting the depth, and supporting out of the annular groove by a positioning block on the positioner 6 under the action of a spring so as to position the device; after the depth is confirmed to be correct, igniting and setting the soluble bridge plug 5, connecting a setting tool or a hydraulic setting device with the upper part of the central tube, pushing the spacer ring to move downwards, meanwhile, pushing the anchoring component, the upper cone, the outer wrist guard, the inner wrist guard, the middle rubber tube, the lower cone and the anti-collision ring of the soluble bridge plug 5 to move downwards together, expanding the middle rubber tube and the wrist guard component outwards to fit the sleeve in the extrusion process, meanwhile, expanding the anchoring component outwards in the movement process, and at the moment, tightly clamping the anchoring component on the wall of the sleeve to limit other components to continue moving downwards; therefore, the middle rubber cylinder is expanded and deformed to perform setting due to the continuous downward force, and the upper anchoring component is outwards propped on the wall of the sleeve to be clamped due to the influence of the setting force and the upper and lower centrum on the anchoring component, so that the whole setting process is completed, and a setting tool and a cable are pulled out;
after the soluble bridge plug 5 is seated, the first pressure transfer hole 21 and the second pressure transfer hole 24 are isolated, when hydraulic pressure is applied to the upper piston hole, pressure difference occurs between the upper part and the lower part of a piston of the well cementation sliding sleeve, thrust is generated, the pin is sheared, the sliding sleeve 3 is opened, the sliding sleeve hole is exposed, a channel communicated with the bottom layer in the sleeve is realized, and fracturing construction is realized. The display groove arranged in the well cementation sliding sleeve is matched with the elastic display of the soluble bridge plug 5, an over-lifting force is provided for the cable, the construction display is used as the basis, the pump is started to pump to reach the opening pressure of the well cementation sliding sleeve, the change of the pump pressure is observed, the sliding sleeve is opened instantly, and if the pump pressure has an instant pressure drop display, the fracturing construction of the layer can be started.
The well cementation sliding sleeve of the embodiment is activated by fluid pressure, and the fluid holes are opened by controlling the fluid pressure, so that fluid flows into an underground target layer from a well casing, perforation operation is avoided, fracturing steps in the construction process are reduced, and the service life of the casing is greatly prolonged; the fracturing steps are reduced, so that the phenomena of deformation, even breakage and the like of the sleeve are effectively prevented; the well cementation sliding sleeve has a simple assembly mode, can avoid the damage of parts in the assembly process and reduce the resource waste; and after the assembly is completed, if a problem is found, the well cementation sliding sleeve can be disassembled, parts are replaced, and the maintenance is convenient.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A well cementation sliding sleeve system, which is characterized by comprising:
a jacket (1);
the inner sleeve (2) is arranged in the outer sleeve (1), at least one part of one end of the inner sleeve (2) is positioned outside the outer sleeve (1), the outer wall of one end of the inner sleeve (2) is in a step shape, the steps are three in number, first pressure transfer holes (21) which are uniformly spaced are formed in the side face of the first step of the inner sleeve (2), two second annular grooves (23) are formed in the second step which is counted outwards from the center of the inner sleeve (2), and second pressure transfer holes (24) which are uniformly spaced are formed in the other end of the inner sleeve (2); a first ring groove (22) is formed in the outer wall of the inner sleeve (2), the first ring groove (22) is close to the first step side face of the inner sleeve (2), a part of the other end of the inner sleeve (2) protrudes outwards to form a convex part (25), and two third ring grooves (26) are formed in the convex part (25) along the circumferential direction;
the sliding sleeve (3) is sleeved on the inner sleeve (2), when the sliding sleeve (3) is provided with a plurality of sliding sleeves, the sliding sleeves (3) are arranged adjacently and are integrally positioned in the outer sleeve (1), the outer wall of each sliding sleeve (3) is matched with the inner wall of the outer sleeve (1), the inner walls at two ends of each sliding sleeve (3) are respectively provided with a fifth annular groove (31) along the circumferential direction, one side of each fifth annular groove (31) is provided with a sixth annular groove (32), each sixth annular groove (32) is positioned on the outer wall of each sliding sleeve (3), one sixth annular groove (32) is close to the center of each sliding sleeve (3), the other sixth annular groove (32) is close to the end face of each sliding sleeve (3), and one side, close to the end face of each sliding sleeve (3), of each sixth annular groove (32) is provided with a mounting hole (33);
the joint (4) is arranged at one end of the outer sleeve (1), at least one part of one end of the joint (4) is positioned in the outer sleeve (1) and is positioned between the inner sleeve (2) and the outer sleeve (1), two ends of the joint (4) are inwards sunken to form concave parts (41), and two fourth annular grooves (42) are formed in the outer wall of one concave part (41);
and the locator (6) is fixed at one end of the soluble bridge plug (5) and is arranged in the inner sleeve (2) together with the soluble bridge plug (5) when in use, and the locator (6) is used for limiting the position of the soluble bridge plug (5) in the inner sleeve (2).
2. The well cementation sliding sleeve assembly method is applied to the well cementation sliding sleeve system as claimed in claim 1, and is characterized by comprising the following steps of:
s01, placing the inner sleeve (2) on a bench clamp and fixing;
s02, marking in a first ring groove (22) of the inner sleeve (2);
s03, checking whether a first pressure transmission hole (21) and a second pressure transmission hole (24) in the inner sleeve (2) are unobstructed or not;
s04, uniformly coating a layer of butter on the inner sleeve (2);
s05, installing an O-shaped ring coated with butter in one of the second ring grooves (23) on the inner sleeve (2) and one of the third ring grooves (26) on the convex part (25);
s06, coating grease on the O-shaped ring on the sliding sleeve (3) and installing the O-shaped ring in the fifth annular groove (31) and the sixth annular groove (32);
s07, uniformly smearing butter inside the sliding sleeve (3);
s08, moving the sliding sleeve (3) upwards from the bottom of the inner sleeve (2) to a stepped limiting position at the top of the inner sleeve (2);
s09, observing and confirming the position of the mark of the first ring groove (22) of the inner sleeve (2) through the mounting hole (33) of the sliding sleeve (3), and mounting uniformly distributed shearing pins in the mounting hole (33) according to construction requirements;
s10, uniformly coating butter/thread oil on the ACME thread part of the inner sleeve (2);
s11, the outer sleeve (1) is installed upwards from the bottom of the inner sleeve (2) and fixed.
3. The well cementation sliding sleeve assembling method according to claim 2, wherein the number of the installed shear pins of S09 is 6~8.
4. A well cementation sliding sleeve maintenance method, which applies the well cementation sliding sleeve system as claimed in claim 1, and is characterized by comprising the following steps:
s01, placing the end part of the inner sleeve (2) of the well cementation sliding sleeve on a bench clamp and fixing;
s02, taking out the positioning pin connected with the joint (4) and the inner sleeve (2);
s03, detaching the bottom of the joint (4) from the position between the inner sleeve (2) and the outer sleeve (1);
s04, taking out the O-shaped ring in the fourth annular groove (42) of the joint (4);
s05, taking out the positioning pin of the outer sleeve (1);
s06, taking the outer sleeve (1) down from the inner sleeve (2);
s07, cleaning the sliding sleeve (3) and the inner sleeve (2);
s08, taking out the shear pin on the sliding sleeve (3);
s09, detaching the auxiliary sliding sleeve (3) from the inner sleeve (2);
s10, removing all O-shaped rings on the sliding sleeve (3);
s11, cleaning the inner sleeve (2) and removing all O-shaped rings on the inner sleeve (2);
s12, the inner sleeve (2) is taken down from the bench clamp.
5. The well cementation sliding sleeve maintenance method according to claim 4, wherein the number of the positioning pins of S02 is 8.
6. The use method of the well cementation sliding sleeve system is applied to the well cementation sliding sleeve system as described in claim 1, and is characterized by comprising the following steps of:
s01, putting a first layer of well cementation sliding sleeve and a toe end sliding sleeve into a designed depth in a shaft according to operation requirements;
s02, after well cementation is finished, opening the toe end sliding sleeve and performing fracturing operation;
s03, after fracturing, putting a soluble bridge plug (5) into the first layer of well cementation sliding sleeve, when the soluble bridge plug (5) reaches the position of the first layer of well cementation sliding sleeve, lowering for 20-40 m, reversely lifting the well cementation sliding sleeve, measuring the reversely lifted suspension weight, when the soluble bridge plug (5) is close to the position of the first layer of well cementation sliding sleeve, if an over-lifting reaction occurs, stopping over-lifting within 0.5T of over-lifting of the over-lifting weight, and correcting the depth;
s04, igniting after the depth is confirmed to be correct in the step three, setting the soluble bridge plug (5), and pulling out a setting tool and a cable;
s05, starting a pump to reach the opening pressure of the well cementation sliding sleeve and observing the change of the pressure of the pump, wherein the fracturing construction of the layer is carried out when the sliding sleeve (3) is opened instantly and if the pressure of the pump has an instant pressure drop display;
and S06, performing fracturing construction operation layer by layer according to the steps from S01 to S05.
7. The method of using the well cementation slide sleeve system of claim 6, wherein the correction depth is equal to the design depth.
8. The method of using the well cementation sliding sleeve system according to claim 6, wherein the back lifting weight is equal to the weight in the casing plus the action weight of the positioner (6).
9. The method for using the well cementation sliding sleeve system according to claim 6, wherein the setting tool is a Beck 20 setting tool or a hydraulic setting device.
10. The use method of the well cementation sliding sleeve system according to claim 6, wherein the well cementation sliding sleeve is stressed in a balanced manner before the setting tool enters the well.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111078758.3A CN113605859B (en) | 2021-09-15 | 2021-09-15 | Well cementation sliding sleeve system, using method, well cementation sliding sleeve assembling method and maintenance method |
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| CN113605859B true CN113605859B (en) | 2023-02-03 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2345686Y (en) * | 1998-01-13 | 1999-10-27 | 辽河石油勘探局井下作业公司 | Retrievable bridging plug |
| CN108104769A (en) * | 2018-02-02 | 2018-06-01 | 西南石油大学 | A kind of explosion chip fracturing control valve |
| CN112211592A (en) * | 2019-07-12 | 2021-01-12 | 中国石油化工股份有限公司 | Switchable well cementation sliding sleeve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8944167B2 (en) * | 2009-07-27 | 2015-02-03 | Baker Hughes Incorporated | Multi-zone fracturing completion |
| CN108138548B (en) * | 2015-07-31 | 2021-01-12 | Abd技术有限责任公司 | Up-down fracturing system |
-
2021
- 2021-09-15 CN CN202111078758.3A patent/CN113605859B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2345686Y (en) * | 1998-01-13 | 1999-10-27 | 辽河石油勘探局井下作业公司 | Retrievable bridging plug |
| CN108104769A (en) * | 2018-02-02 | 2018-06-01 | 西南石油大学 | A kind of explosion chip fracturing control valve |
| CN112211592A (en) * | 2019-07-12 | 2021-01-12 | 中国石油化工股份有限公司 | Switchable well cementation sliding sleeve |
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