CN217380495U - Sleeve toe end sliding sleeve for controlling delay time on ground - Google Patents

Abstract

A sleeve toe end sliding sleeve for controlling delay time on the ground relates to the field of well completion fracturing construction of oil and gas wells. The sleeve pipe toe end sliding sleeve of ground control time delay includes that sleeve pipe body and cover locate the cylinder liner of sleeve pipe body outer wall, enclose between sleeve pipe body and the cylinder liner and close the vacuole formation, the cavity communicates through a plurality of connecting holes and a plurality of sandblast hole with sleeve pipe body inside and cylinder liner outer wall respectively, be equipped with the piston that is used for cuting connecting hole and sandblast hole in the cavity, intercommunication connecting hole and sandblast hole when the piston removes along the cavity, the inside and cavity one end of sleeve pipe body passes through the pressurization passageway intercommunication, be equipped with the blasting valve in the pressurization passageway, the one end that the cavity is close to the pressurization passageway still is equipped with time delay buffering subassembly. The sleeve toe end sliding sleeve for controlling the delay time on the ground improves the opening safety and reliability of the toe end sliding sleeve.

Description

Sleeve toe end sliding sleeve for controlling delay time on ground

Technical Field

The application relates to the field of fracturing construction of well completion of oil and gas wells, in particular to a sleeve toe end sliding sleeve for controlling delay time on the ground.

Background

The toe end sliding sleeve is an oil extraction device which opens a sand blasting hole to establish a first section of fracturing channel when the pressure in a casing reaches a preset value, and is mainly matched with a blasting valve and a delay mechanism in structure, the blasting valve is opened through wellhead pressure holding to introduce a wellbore high-pressure liquid into the sliding sleeve, and a time delay is formed through the delay mechanism, so that the casing pressure integrity test is carried out before a flow channel to a target stratum is established, after the time delay is completed, a piston moves in place to enable the inside and the outside of the casing to be communicated, and the wellbore-stratum flow channel is established. The core of the existing delay mechanism is a delay valve and hydraulic oil, the performance of the delay valve directly influences the reliability of the sliding sleeve, as the hydraulic oil is sensitive to temperature and the viscosity can change along with high pressure and high temperature, the delay time error is larger, in field application, the conditions of delay failure or incapability of opening the sliding sleeve due to the blockage of the delay valve often occur, the problems of high failure rate and low reliability exist, and in addition, products with different pressure specifications need to be correspondingly used in the face of wells with different vertical depths, and the manufacturing cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sleeve pipe toe end sliding sleeve of ground control delay time, it can improve the security and the reliability that the toe end sliding sleeve opened.

The embodiment of the application is realized as follows:

the embodiment of the application provides a sleeve toe end sliding sleeve for controlling delay time on the ground, which comprises a sleeve body and a cylinder sleeve sleeved on the outer wall of the sleeve body, wherein a cavity is formed by enclosing the sleeve body and the cylinder sleeve, the cavity is respectively communicated with the inside of the sleeve body and the outer wall of the cylinder sleeve through a plurality of connecting holes and a plurality of sand blasting holes, a piston for cutting off the connecting holes and the sand blasting holes is arranged in the cavity, the piston is communicated with the connecting holes and the sand blasting holes when moving along the cavity, the inside of the sleeve body and one end of the cavity are communicated through a pressurizing channel, a blasting valve is arranged in the pressurizing channel, one end of the cavity close to the pressurizing channel is also provided with a delay buffering assembly, at least one flow guide hole for communicating the cavity and the outer wall of the cylinder sleeve is arranged on the cylinder sleeve, the delay buffering assembly comprises buffering rods which are in one-to-one correspondence with the flow guide holes and buffering springs for connecting the corresponding buffering rods and the inner walls of the cavities, and the buffering rods are used for cutting off the corresponding flow guide holes and cavities, when the pressure of one end of the cavity close to the pressurizing channel is increased, the buffer spring is pushed to be lifted and the buffer rod is enabled to move to keep the sealed diversion hole, when the pressure of one end of the cavity close to the pressurizing channel is reduced, the buffer spring contracts to drive the buffer rod to move to communicate with the corresponding diversion hole and the cavity, and liquid flowing into the diversion hole is enabled to push the piston to move to communicate with the connecting hole and the sand blasting hole.

In some optional embodiments, the outer wall of the cylinder liner is provided with at least one flow guide groove extending along the circumferential direction of the cylinder liner, and the flow guide hole is formed in the bottom wall of the flow guide groove.

In some alternative embodiments, the outer wall of the cylinder sleeve is provided with at least one drainage groove extending axially along the cylinder sleeve, and the drainage groove is communicated with the diversion groove.

In some alternative embodiments, the buffer rod comprises an upper valve rod, an overshooting claw and a lower valve rod which are connected in sequence.

In some optional embodiments, the inner wall of the cavity is connected with crescent plates which are connected with the buffer springs in a one-to-one correspondence manner.

In some alternative embodiments, a plurality of sand blast holes are spaced circumferentially along the liner.

In some alternative embodiments, the plurality of connection apertures are spaced circumferentially along the cannula body.

In some alternative embodiments, an upper connector and a lower connector are connected to both ends of the sleeve body, respectively.

The beneficial effect of this application is: the sleeve toe end sliding sleeve for controlling the time delay on the ground comprises a sleeve body and a cylinder sleeve sleeved on the outer wall of the sleeve body, a cavity is formed by enclosing between the sleeve body and the cylinder sleeve, the cavity is respectively communicated with the inside of the sleeve body and the outer wall of the cylinder sleeve through a plurality of connecting holes and a plurality of sand blasting holes, a piston for cutting off the connecting holes and the sand blasting holes is arranged in the cavity, the piston is communicated with the connecting holes and the sand blasting holes when moving along the cavity, the inside of the sleeve body and one end of the cavity are communicated through a pressurizing channel, a blasting valve is arranged in the pressurizing channel, a time delay buffering assembly is also arranged at one end of the cavity close to the pressurizing channel, at least one flow guide hole for communicating the cavity and the outer wall of the cylinder sleeve is arranged on the cylinder sleeve, the time delay buffering assembly comprises buffering rods which are in one-to-one correspondence with the flow guide holes and buffering springs for connecting the corresponding flow guide rods and the inner wall of the cavity, and the buffering rods are used for cutting off the corresponding flow guide holes and the cavity, when the pressure of one end of the cavity close to the pressurizing channel is increased, the buffer spring is pushed to be pulled up and the buffer rod is made to move to keep the sealed diversion hole, when the pressure of one end of the cavity close to the pressurizing channel is reduced, the buffer spring contracts to drive the buffer rod to move to communicate with the corresponding diversion hole and the cavity, and liquid flowing into the diversion hole pushes the piston to move to communicate with the connecting hole and the sand blasting hole. The sleeve toe end sliding sleeve for controlling the delay time on the ground improves the opening safety and reliability of the toe end sliding sleeve.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a partial cross-sectional view of a casing toe end slip sleeve for controlling delay time at the surface as provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a partial structure of a sleeve toe end sliding sleeve for controlling delay time on the ground according to an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view of a bumper bar of the sleeve toe sliding sleeve for controlling delay time in the ground according to an embodiment of the present application.

In the figure: 100. a sleeve body; 110. an upper joint; 120. a lower joint; 130. a cylinder liner; 140. a cavity; 150. connecting holes; 160. sand blasting holes; 170. a piston; 180. a pressurizing channel; 181. a blast valve; 190. a buffer rod; 191. an upper valve stem; 192. fishing claws; 193. a lower valve stem; 200. a buffer spring; 210. a flow guide hole; 220. a diversion trench; 230. a drainage groove; 240. a crescent moon plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The features and properties of the surface controlled delay time casing toe end slip of the present application are described in further detail below in conjunction with the examples.

As shown in fig. 1, 2, 3 and 4, an embodiment of the present application provides a sleeve toe end sliding sleeve for controlling a delay time on a ground, including a sleeve body 100 and a cylinder sleeve 130 sleeved on an outer wall of the sleeve body 100, two ends of the sleeve body 100 are respectively connected with an upper joint 110 and a lower joint 120, a cavity 140 is formed between the sleeve body 100 and the cylinder sleeve 130, the cavity 140 is respectively communicated with an inside of the sleeve body 100 and an outer wall of the cylinder sleeve 130 through eight connecting holes 150 and eight sand blasting holes 160, the eight sand blasting holes 160 are arranged at intervals along a circumferential direction of the cylinder sleeve 130, the eight connecting holes 150 are arranged at intervals along the circumferential direction of the sleeve body 100, a piston 170 for cutting off the connecting holes 150 and the sand blasting holes 160 is arranged in the cavity 140, the connecting holes 150 and the sand blasting holes 160 are communicated when the piston 170 moves along the cavity 140, the inside of the sleeve body 100 and one end of the cavity 140 are communicated through a pressurizing channel 180, a blasting valve 181 is arranged in the pressurizing channel 180, a time delay buffer assembly is further arranged at one end of the cavity 140 close to the pressurizing channel 180, two oppositely-arranged guide holes 210 are formed in the cylinder sleeve 130, and the guide holes 210 are communicated with the outer walls of the cavity 140 and the cylinder sleeve 130; the delay buffer assembly comprises buffer rods 190 which are in one-to-one correspondence with the diversion holes 210 and buffer springs 200 which are connected with the corresponding buffer rods 190 and the inner walls of the cavities 140, the inner walls of the cavities 140 are connected with crescent plates 240 which are in one-to-one correspondence with the buffer springs 200, the buffer rods 190 are used for cutting off the corresponding diversion holes 210 and the cavities 140, each buffer rod 190 comprises an upper valve rod 191, a fishing claw 192 and a lower valve rod 193 which are sequentially connected, three diversion grooves 220 which extend along the circumferential direction of the outer wall of the cylinder sleeve 130 are formed in the outer wall of the cylinder sleeve 130, each diversion hole 210 is formed in the bottom wall of one diversion groove 220, two drainage grooves 230 which extend along the axial direction of the outer wall of the cylinder sleeve 130 are formed in the outer wall of the cylinder sleeve 130, and one ends of the two drainage grooves 230 are communicated with the diversion grooves 220 which are provided with the diversion holes 210; when the pressure of the end of the cavity 140 close to the pressurizing passage 180 increases, the buffer spring 200 is pushed to be lifted and the buffer rod 190 moves to keep sealing the diversion hole 210, and when the pressure of the end of the cavity 140 close to the pressurizing passage 180 decreases, the buffer spring 200 contracts to drive the buffer rod 190 to move to communicate the corresponding diversion hole 210 and the cavity 140, and the liquid flowing into the diversion hole 210 pushes the piston 170 to move.

After the sleeve toe end sliding sleeve for controlling the delay time on the ground provided by the embodiment is extended into an oil well, before a flow channel for a target stratum is opened and established, a sleeve pressure integrity test needs to be firstly carried out, a pressurization test is carried out on the inside of the sleeve body 100 on the ground, when the pressure inside the sleeve body 100 reaches a preset value, the explosion valve 181 is broken, the pressurization channel 180 cut by the explosion valve 181 is communicated, the sleeve body 100 is communicated with the cavity 140 through the pressurization channel 180, so that the pressure inside the pressurization channel 180 is introduced into one end, close to the pressurization channel 180, of the cavity 140, the pressure is increased at one end, close to the pressurization channel 180, of the cavity 140, so that the buffer spring 200 is pushed to be pulled up, the buffer rod 190 is moved to one end, close to the piston 170, so that the corresponding diversion hole 210 is isolated from the cavity 140, and after the pressurization test process is finished, an operator carries out pressure relief on the ground on the inside of the sleeve body 100, the pressure of the wellhead is zero, at the moment, the pressure of one end, close to the pressurizing channel 180, of the cavity 140 is reduced, the buffer spring 200 contracts to drive the buffer rod 190 to move towards the direction away from the piston 170 to stop sealing the guide hole 210, the corresponding guide hole 210 is communicated with the cavity 140 between the buffer rod 190 and the piston 170, high-pressure liquid outside the casing body 100 flows into the cavity 140 through the guide hole 210 to further push the piston 170 to move, the piston 170 stops isolating the connecting hole 150 and the sand blasting hole 160 after moving, the cavity 140 is respectively communicated with the eight connecting holes 150 and the eight sand blasting holes 160, and a fracturing channel for communicating the inside and the outside of the casing body 100 is formed to perform fracturing operation.

The burst valve 181 is a rupture disk, the outer wall of the cylinder sleeve 130 is provided with three flow guide grooves 220 extending along the circumferential direction thereof, the flow guide hole 210 is formed in the bottom wall of one flow guide groove 220, the outer wall of the cylinder sleeve 130 is provided with two flow guide grooves 230 extending along the axial direction thereof, one ends of the two flow guide grooves 230 are communicated with the flow guide groove 220 provided with the flow guide hole 210, high-pressure liquid outside the sleeve body 100 can be introduced into the flow guide hole 210 formed in the bottom wall of the flow guide groove 220 through the flow guide hole 210, and therefore the high-pressure liquid outside the sleeve body 100 flows into the cavity 140 through the flow guide hole 210 and further pushes the piston 170 to move to form a fracturing channel.

The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Claims (8)

1. The utility model provides a ground control delay time's sleeve pipe toe end sliding sleeve, its characterized in that, it includes that sleeve pipe body and cover are located the cylinder liner of sleeve pipe body outer wall, enclose between the sleeve pipe body with close the vacuole formation between the cylinder liner, the cavity respectively with inside the sleeve pipe body with the cylinder liner outer wall is through a plurality of connecting holes and a plurality of sandblast hole intercommunication, be equipped with in the cavity and be used for cutting the connecting hole with the piston of sandblast hole, the piston along the cavity communicates when removing connecting hole with the sandblast hole, inside the sleeve pipe body with cavity one end is through the pressurization passageway intercommunication, be equipped with the blasting valve in the pressurization passageway, the cavity is close to the one end of pressurization passageway still is equipped with time delay buffer assembly, seted up on the cylinder liner at least one intercommunication the cavity with the water conservancy diversion hole of cylinder liner outer wall, time delay buffer assembly include with the water conservancy diversion hole one-to-one buffer rod and connection correspondence the buffer rod with empty air conservancy diversion hole The buffer spring of intracavity wall, the buffer beam is used for cuting the correspondence the water conservancy diversion hole with the cavity, the cavity is close to promote when the one end pressure of pressurization passageway increases buffer spring draws to rise and makes the buffer beam removes to keep sealed the water conservancy diversion hole, the cavity is close to when the one end pressure of pressurization passageway reduces buffer spring shrink drives the buffer beam removes the intercommunication and corresponds the water conservancy diversion hole with the cavity, and makes the downthehole inflow liquid of water conservancy diversion promotes the piston removes the intercommunication the connecting hole with the sandblast hole.

2. The sleeve toe end sliding sleeve for controlling delay time on the ground as recited in claim 1, wherein the outer wall of the cylinder sleeve is provided with at least one flow guide groove extending along the circumferential direction of the cylinder sleeve, and the flow guide hole is opened at the bottom wall of the flow guide groove.

3. The sleeve toe end sliding sleeve for controlling delay time on the ground as recited in claim 2, wherein the outer wall of the cylinder sleeve is provided with at least one drainage groove extending along the axial direction of the cylinder sleeve, and the drainage groove is communicated with the diversion groove.

4. The sleeve toe end sliding sleeve for controlling delay time on the ground as claimed in claim 1, wherein the buffer rod comprises an upper valve rod, a fishing claw and a lower valve rod which are connected in sequence.

5. The ground delay time controlling sleeve toe end sliding sleeve according to claim 1, wherein the inner wall of the cavity is connected with crescent plates which are connected with the buffer springs in a one-to-one correspondence manner.

6. The ground delay time control sleeve toe end sliding sleeve according to claim 1, wherein a plurality of the sand blasting holes are arranged at intervals along the circumferential direction of the cylinder sleeve.

7. The ground controlled delay time casing toe end slip sleeve of claim 1, wherein a plurality of said connection holes are spaced circumferentially along said casing body.

8. The ground controlled delay time sleeve toe end sliding sleeve according to claim 1, wherein the two ends of the sleeve body are respectively connected with an upper joint and a lower joint.

Images