CN202125287U - Anchor fluke type sliding sleeve opening tool - Google Patents

Abstract

The utility model relates to an anchor fluke type sliding sleeve opening tool. A sealing body of the tool includes packing components at both ends of the barrel body of the sealing body and a horn-shaped composite ball seat positioned at the uppermost end of the sealing body; the inner diameter of the half upper part of the barrel body of a ball cage combination body is greater than that of the half lower part; the ball cage combination body includes a ball cage composed of an upper ball cage positioned on the half upper part and a lower ball cage positioned on the half lower part; the upper ball cage is provided with a group of openings connected with the inner space of the half upper part of the barrel body; the top lower part of the lower ball cage is close to the inner wall of the half lower part of the barrel body, and the inner diameter of the lower part of the lower ball cage is gradually reduced and the openings at the lowest end extend in the composite ball seat at upper end of the sealing body; the clamping sleeve combination body of the tool is composed of a group of elastic sheets with root parts connected to the upper end of the barrel body of the ball cage combination body; the outer surfaces of the elastic sheets are provided with annular grooves on an intelligent sliding sleeve inner barrel which are positively accorded with convex teeth. The novel conception of opening different locks with different keys fulfills staged fracturing under the stage unrestricting condition.

Description

An anchor claw type sliding sleeve opening tool

technical field

The utility model relates to a device in the technical field of petroleum and natural gas exploitation, in particular to a combined tool for staged fracturing of petroleum and natural gas well completion projects.

Background technique

In recent years, domestic oil and gas fields have successively developed sandblasting sliding sleeves for different reservoir characteristics for the key tool for vertical and horizontal well layered fracturing stimulation. Such as the patent announcement number CN2100480U, the title is called the pressure-guiding sandblasting sliding sleeve for fracturing, which is mainly used for oil well fracturing. This patent was announced in 1992. Patent Publication No. CN200820061922, named Fracturing Sliding Sleeve Sandblast, published in 2008, is mainly used for gas well fracturing. The working principle of this type of sandblasting sliding sleeve is to use the outer cylinder of the sliding sleeve and the core tube arranged in the outer cylinder of the sliding sleeve. The upper port of the outer cylinder of the sliding sleeve has a sealing mating surface for receiving the starting ball; the starting ball and the sealing mating surface cooperate one by one, and the diameter of the starting ball is larger than the inner diameter of the sealing mating surface. Different actuating balls and sealing mating surfaces increase in order according to a certain gradient. During construction, put in the corresponding starting balls in turn, press the shear pin at the wellhead, and realize the opening of the sliding sleeve. The inner diameter of this type of sliding sleeve has multiple throttling surfaces that increase from small to large, which cannot achieve full passage. Since the inner diameter of the sealing mating surface must have a step difference, the stages of fracturing and acidizing are limited. After this type of sliding sleeve is opened, there is no relevant tool for fixed-point closing.

At present, oil and gas horizontal wells, vertical wells staged acidizing, and fracturing techniques are divided into flow-limiting fracturing and staged fracturing methods. The mainstream is staged fracturing methods, including chemical staged fracturing, packer staged fracturing, hydraulic fracturing. Jet staged fracturing, coiled tubing staged fracturing and combined well completion technology. Among the staged fracturing methods, packer staged fracturing is the most widely used, including pumped bridge plug staged fracturing, ball-pitching + sliding sleeve packer staged, annular packer, double-sealed single-pressure fracturing section fracturing, etc.

Among them, there is no limit to the number of fracturing stages for annular packers and pumping bridge plugs, but the fracturing operation cannot be continuous, and re-perforation is required after each stage of operation. After the operation is completed, well-killing drill plugs are required, and the operation period is long ,costly.

Double-seal single-pressure staged fracturing needs to drag the pipe string, and the packer needs to be set and sealed many times, so the construction period is long. The staged fracturing of the pitching ball+sliding sleeve packer uses balls and ball seat combinations with different grades, and multi-stage fracturing can be completed at one time without moving the string. However, because different balls are designed according to a certain gradient, the size of the packer The number of segments is limited.

For example, the "Segmented Fracturing String for Horizontal Wells" disclosed in Chinese patent literature (publication number: CN201396131, publication date: 2010.02.03) is composed of a tubing string, a differential pressure packer, a safety joint, and a sliding sleeve packer. , the differential pressure packer and the sliding sleeve packer are installed on the tubing string, and a safety joint is installed between them. In the staged reconstruction measures of horizontal wells, packers are used to achieve staged fracturing of horizontal wells, thereby significantly improving the overall effect of construction. But it is only applicable to oil fields to solve the problem of sand stuck in the packer in the horizontal well section. This structure uses the fracturing packer to force the construction in sections. After the fracturing of one section is completed, the pipe string is lifted up to proceed to the next layer. The fracturing construction of the section, which makes it difficult to unseal the packer after fracturing; the packer of the lifting string is damaged and the seal is not tight, resulting in fracturing failure; after the fracturing is completed, the formation pressure is high, and the lifting It is easy to cause blowout and accidents when the pipe string is used. The operability is poor and the process is cumbersome. Every time the pipe string is lifted, the wellhead and fracturing pipeline need to be disassembled. The procedure is complicated, the labor intensity of the operators is high, and the safety is poor.

Another document disclosed in the Chinese patent literature is "Horizontal Well Mechanical Staged Fracturing Anti-Stuck Technology String" (publication number: CN101338663, publication date: 2009.01.07), which mainly solves the problem of the fracturing process of horizontal wells in low-permeability reservoirs. Due to the small annulus area of the lower oil casing and the sand stuck problem caused by the sand settling below the sandblasting port, it can only be used for fracturing of horizontal wells in oil fields, and multi-layer fracturing and merging of layers cannot be realized without moving the string Due to the technical requirements of mining, it is not possible to carry out staged fracturing with no limit to the number of stages without moving the string.

The Chinese patent literature also discloses the "Horizontal Well Packer Staged Fracturing Process String" (publication number: CN101560877, publication date: 2009.10.21), although it realizes 2~ Three-layer layer-changing fracturing technology, but it cannot realize unlimited stages of staged fracturing.

Other disclosed inventions, such as the single-layer fracturing and combined production string technology of oil and gas wells (publication number: CN101418681), oil and gas well multi-layer fracturing strings (publication number: CN201144682), etc., all adopt the method of throwing the ball to open the sliding sleeve , Unlimited series sectioning of the fixed string cannot be performed, and the sliding sleeve cannot be closed.

Utility model content

The utility model aims at the current oil and natural gas horizontal wells, vertical wells, and directional wells in staged acidification and fracturing, which need to drag the pipe string and the number of sections is limited, and provides a selectivity for well completion engineering. Opening tool in switch slide assembly.

The anchor claw type sliding sleeve opening tool of the present utility model is realized in this way:

The anchor claw type sliding sleeve opening tool 3 is a cylindrical component that can be inserted into the interior of the intelligent sliding sleeve 1 and matched with the intelligent sliding sleeve 1; The outer surface of the ferrule assembly of the intelligent sliding sleeve opening tool has groove teeth on the inner wall of the inner cylinder 1.3 of the intelligent sliding sleeve 1, and can push the intelligent sliding sleeve 1. Convex teeth and grooves that move to the lower end of the inner cylinder 1.3;

The sealing body of the fluke-type sliding sleeve opening tool 3 includes packing components B-13.1, packing components B-23.2 at both ends of the cylinder, and a trumpet-shaped composite ball seat B3.3 located at the uppermost end of the sealing body;

The inner diameter of the upper half of the cylinder of the anchor claw type sliding sleeve opening tool 3 ball cage assembly is greater than the inner diameter of the lower half, and an upper ball cage B3 located in the upper half is arranged in the ball cage assembly. 7 and a ball cage composed of the lower ball cage B3.6 located in the lower half; a group of openings are opened on the cage wall of the upper ball cage B3.7 to communicate with the inner space of the upper half of the cylinder; the lower ball The lower part of the cage B3.6 is in close contact with the inner wall of the lower half of the cylinder body, the inner diameter of the lower part of the lower ball cage B3.6 gradually decreases and the opening at the lowermost end extends into the composite ball seat B3.3 at the upper end of the sealing body ; There is a sphere B3.5 in the lower cage B3.6 with a diameter larger than the lower opening of the lower cage B3.6; the middle part of the lower cage B3.6 is provided with a flow diversion connecting the inner and outer spaces of the cage Hole B3.8; the composite ball seat B3.3 is provided with a sealing ring B3.4 that cooperates with the lower part of the lower cage B3.6; the outer part of the upper end of the upper cage B3.7 is provided with a salvage tooth B3.9, and the upper half of the cylinder of the ball cage assembly starts at the radial position corresponding to the fishing tooth B3.9, and its inner diameter gradually shrinks upwards to be smaller than the upper ball cage B3.7 the maximum outer diameter;

The ferrule assembly of the anchor claw type sliding sleeve opening tool 3 is composed of a group of shrapnel 3.10 whose roots are connected to the upper end of the ball cage assembly cylinder. The outer surface of the shrapnel 3.10 is provided with the same The annular groove on the inner cylinder 1.3 of the intelligent sliding sleeve 1 fits positively with the protruding teeth and can push the protruding teeth and grooves of the inner cylinder 1.3 to move downward. The bottom is provided with the limit teeth 3.11 that can be stuck in the upper positioning groove 1.5 and the lower positioning groove 1.6 of the inner wall of the intelligent sliding sleeve 1 inner cylinder 1.3.

A group of intelligent sliding sleeve opening tools, a group of intelligent sliding sleeves, and a group of intelligent sliding sleeve closing tools of the utility model are used in one-to-one correspondence; The following components fit for the new same-day application, including

1. Intelligent sliding sleeve

The intelligent sliding sleeve 1 is a cylindrical device connected in the casing or oil pipe, coaxial with the casing or oil pipe, and with the same outer diameter;

The two ends of the intelligent sliding sleeve 1 are the sliding sleeve joints 1.1 connected with the casing or the oil pipe; between the sliding sleeve joints 1.1 are the outer joints 1.1 connected with the sliding sleeve joints 1.1 at both ends, and the outer diameter is the same as that of the casing or the oil pipe. The cylinder 1.2 and the inner cylinder 1.3 whose length is shorter than that of the outer cylinder 1.2, and which form a dynamic seal between the outer walls of both ends and the inner wall of the outer cylinder 1.2, and can move axially in the outer cylinder 1.2;

The wall of the upper end of the outer cylinder 1.2 is provided with a sandblasting port 1.4; when the inner cylinder 1.3 moves from the initial position close to the upper end of the outer cylinder 1.2 to a position close to the lower end of the outer cylinder 1.2, the upper end of the inner cylinder 1.3 moves to the lower end of the sandblasting port 1.4 and expose the sandblasting port 1.4;

In the inner cylinder 1.3, there is a group of annular grooves and protruding teeth distributed on the inner wall of the inner cylinder 1.3 along the axial direction with different intervals;

An upper limit groove 1.5 and a lower limit groove 1.6 are respectively provided at the top and bottom of the annular groove on the inner wall of the inner cylinder 1.3 and the protruding teeth.

2. Intelligent sliding sleeve closing tool

The intelligent sliding sleeve assembly described in the utility model also includes an intelligent sliding sleeve closing tool 4;

The smart sliding sleeve closing tool 4 is a cylindrical structure that can be inserted into the inner cylinder 1.3 of the smart sliding sleeve 1, and consists of a shrapnel 4.1 closed at the bottom and open at the top, and a shrapnel inserted into the opening of the shrapnel 4.1. Pull rod 4.2 composition;

The outer surface of the elastic piece 4.1 is provided with a convex tooth and a groove that are in reverse fit with the annular groove on the inner cylinder 1.3 of the intelligent sliding sleeve 1 and the convex teeth and can push the inner cylinder 1.3 to move upward; the elastic piece 4.1 The top and bottom of the protruding teeth and grooves are provided with upper stopper compression heads 4.5, Compression head 4.6 of the lower limiter; the upper end of the shrapnel is provided with a shrapnel compression head 4.4 with the largest diameter and a slope at the upper and lower ends;

The length of the pulling rod 4.2 is greater than the total length of the shrapnel, and the upper part has a joint 4.7 connected with the feeding pipe string, and the pulling rod 4.2 is screwed into the lower cylindrical body of the shrapnel.

3. Fishing tools

The fishing tool is a cylindrical component that can be inserted into the ferrule assembly at the upper end of the intelligent sliding sleeve opening tool;

The lower end of the fishing tool body is provided with an expanding clip spring capable of catching the fishing teeth.

What is important is that in the sliding sleeve assembly described in the utility model, the diameters of the openings at the lower part of the lower ball cage in all intelligent sliding sleeve opening tools are the same.

In addition, the cross-sectional area of a group of openings in the upper cage should be equal to or greater than the cross-sectional area of the lower openings in the lower cage.

By using the sliding sleeve assembly comprising the intelligent anchor claw type sliding sleeve opening tool of the utility model, segmental fracturing operations with unlimited stages can be completed. The described operation method comprises the following steps:

1. A group of prefabricated smart sliding sleeves 1 with different combinations of grooves and protruding teeth are installed sequentially from bottom to top on the casing or casing of each oil and gas reservoir section in the oil and gas well in the tubing;

2. Pump the supporting intelligent sliding sleeve opening tools into the well in turn. After each matching intelligent sliding sleeve opening tool enters each corresponding sliding sleeve, the convex teeth and grooves on the outer surface of the corresponding ferrule assembly Snap into the grooves and protruding teeth on the inner wall of the inner cylinder 1.3 of the intelligent sliding sleeve 1 that are positively matched with it;

3. After the oil and gas well string is pressurized, each specific intelligent sliding sleeve opening tool drives the corresponding intelligent sliding sleeve to move downward, thereby opening the corresponding intelligent sliding sleeve 1 and exposing the sandblasting port 1.4, implement the fracturing operation of the well section;

4. From the lower end of the wellbore to the upper end, repeat the above 2 and 3 processes in each oil and gas reservoir section installed with a different intelligent sliding sleeve 1, to realize unlimited stages of fracturing, and open the well after fracturing Drain, enter into production.

More specifically, after each supporting intelligent sliding sleeve opening tool in the above step 2 enters each corresponding sliding sleeve, the corresponding sleeve assembly bounces off the outer slip sleeve 2.13 or Open the shrapnel 3.10 so that the protruding teeth and grooves on the outer surface of the ferrule assembly of the intelligent sliding sleeve opening tool snap into the grooves and protrusions on the inner cylinder 1.3 of the intelligent sliding sleeve 1. in the teeth.

In the above operations, when the intelligent sliding sleeve opening tool needs to be recovered after use, a fishing tool can be used to salvage and recover the intelligent sliding sleeve opening tool.

When it is necessary to seal a specific oil and gas reservoir section, after the intelligent sliding sleeve opening tool is fished out of the intelligent sliding sleeve, the method of the utility model can be lowered into the intelligent sliding sleeve specific to the section through the pipe string 1 The matching intelligent sliding sleeve closing tool 4 is inserted into the intelligent sliding sleeve 1, and the annular convex teeth and grooves on the outer surface of the intelligent sliding sleeve 1 are snapped into the inner cylinder 1.3 of the intelligent sliding sleeve. The upper end of the intelligent sliding sleeve closing tool 4 is connected with the coiled tubing or the oil pipe, thereby pulling the inner cylinder 1.3 of the intelligent sliding sleeve 1 to move upward to block the sandblasting port 1.4, and closing the intelligent sliding sleeve 1. Type sliding sleeve 1, stop the fluid output of this section.

In addition, it should be noted that the up and down order mentioned in this article is based on the approach of the top near the wellhead and the bottom far away from the wellhead.

The core idea of the utility model is to open a lock with one key, which is realized by combining the width and shape of the tooth grooves and the number of the tooth grooves. During construction, the intelligent sliding sleeve opening tool is pumped into the downhole by pumping, and each specific intelligent sliding sleeve opening tool will be transported to the specific intelligent sliding sleeve that matches it, and enter its inner cylinder, and the corresponding ferrule The assembly bounces off the outer slip sleeve or its shrapnel, and the protruding teeth and grooves on the outer surface of the ferrule assembly snap into the matching grooves and protruding teeth in the inner cylinder of the intelligent sliding sleeve; at the same time , the intelligent sliding sleeve opening tool is equipped with a ball seat and a ball cage with the same diameter. After the pipe string is sealed in one direction, the pipe string is pressurized, and the intelligent sliding sleeve opening tool is pushed downward, and the inner cylinder of the sliding sleeve is simultaneously pushed toward the down to open the slide. Since the inner diameter of the sliding sleeve is full diameter, the number of sliding sleeves is not limited by the size of the pipe string and the size of the ball. Through the combination of sliding sleeves and packers, it is possible to realize unlimited stages of staged fracturing.

In summary, the selective switch sliding sleeve assembly of the present utility model has the following prominent features:

(1) The inner diameter of the pipe string of the utility model is full diameter, and the number of sliding sleeves is not limited by the diameter of the pipe string.

(2) The selective switch sliding sleeve assembly and method of the present utility model solve the key technical problem of segmental fracturing with unlimited stages in fracturing wells.

(3) Through the application of the utility model, it can achieve staged acidification and fracturing of unlimited stages such as horizontal wells and vertical wells, and the sliding sleeve can be opened and closed at any fixed point, highlighting the characteristics of full diameter, low construction cost and short time.

(4) The selective switch sliding sleeve assembly and method of the present utility model are also suitable for other oil and gas engineering application fields requiring fixed-point switch sliding sleeves and fracturing of shale gas and coalbed methane. .

(5) By compounding in the casing, this method can also realize segmental fracturing with unlimited stages without setting the packer in the cased well.

In recent years, horizontal well technology has become the key technology for developing tight and low permeability reservoirs. However, the staged fracturing technology for horizontal wells is still immature, and the main technical bottleneck is the limited number of stages. The popularization and application of the present invention in the field of petroleum and natural gas engineering will break through the core key of the limited number of horizontal well segments, and has broad application prospects in the future. It is necessary to close the production well of the sliding sleeve at a fixed point.

Compared with conventional horizontal well acidizing and fracturing reconstruction methods, the patent of the present invention utilizes the unique intelligent selective fixed-point switch sliding sleeve and supporting tools, and realizes sliding through the one-to-one correspondence between the sliding sleeve and the groove teeth of the sliding sleeve opening tool. Sets can be placed and opened in an unlimited number of stages. This method solves the key technical problem of staged fracturing with an unlimited number of stages. Combined with fracturing equipment, gas production, well completion acidizing and fracturing strings, it can realize oil and gas wells with unlimited stages of staged acidizing and fracturing reconstruction, and achieve the purpose of multi-stage joint production. This method can be applied to casing And open-hole horizontal well, directional well, vertical well staged fracturing or unlimited stages of staged fracturing. The diameter of the inner cylinder of the sliding sleeve is the same. After the sliding sleeve is taken out and the tool is opened, the gas production pipe can be fully connected, which overcomes the drawbacks of the conventional fracturing activation ball staying in the oil pipe and affecting the production and later production logging; when the oil and gas When water channeling occurs in the well, the corresponding intelligent sliding sleeve closing tool can be lowered to close it. Through the use of this patent, compared with conventional fracturing strings, the number of oil and gas well fracturing segments is effectively increased, the oil and gas development operation process is simplified, the construction operation period is shortened, and the damage to the reservoir caused by well killing and multiple stimulations is reduced. , Oil and gas well post-management is simple and convenient. The invention of the method reduces the development cost and improves the overall development level and development benefit of the oil and gas field. By compounding in the casing, the method can also realize segmental fracturing with unlimited stages without setting the packer in the casing.

Description of drawings

Figure 1 is a schematic diagram of the structure of the intelligent sliding sleeve

Fig. 2 is a structural schematic diagram of the anchor claw type sliding sleeve opening tool.

FIG. 3 is a structural schematic diagram of the intelligent sliding sleeve closing tool 4 .

Detailed ways

The concrete implementation process of the present utility model is as follows:

1) A group of prefabricated smart sliding sleeves with different combinations of convex grooves and concave teeth are installed sequentially from bottom to top in the casing or tubing of each oil and gas reservoir section in the gas well;

2) Pump the supporting intelligent sliding sleeve opening tools into the well in sequence. After each matching intelligent sliding sleeve opening tool reaches each corresponding sliding sleeve, the corresponding ferrule assembly bounces off the outer slip sleeve and enters the well. Matching convex grooves and concave teeth in the intelligent sliding sleeve described above;

3) After the oil and gas well pipe string is pressurized, each specific intelligent sliding sleeve opening tool opens each matching intelligent sliding sleeve to expose the sandblasting hole, and implement the fracturing operation of the well section;

4) From the lower end to the upper end of the wellbore, repeat the above 2) and 3) processes in each oil and gas reservoir section installed with different intelligent sliding sleeves, to realize unlimited stages of segmental fracturing. The well was drained and put into production.

Therefore, the fluke-type sliding sleeve opening tool of the present invention has specific protruding teeth and grooves, and the opening tool is pumped into the well close to the tubing or casing. If the opening tool specific teeth and grooves do not match the teeth of the sleeve inner barrel, the opening mechanism goes in and continues down until the teeth match. Then lock and open the tool, pressurize the pipe string, move down the inner cylinder of the sliding sleeve, and the packing seal assembly enters the designated position to seal the pipe string. At the same time, the sandblasting port is opened to establish a flow passage between the pipe string and the formation, and sand is added for fracturing.

The above-mentioned process is repeated to realize the purpose of segmental fracturing construction with unlimited stages. After each stage is fractured, the well is opened to drain fluid and put into production.

In addition, if it is necessary to salvage the intelligent type sliding sleeve opening device, the overshot of the intelligent type opening tool is lowered, and the sliding sleeve opening tool is salvaged. The specific implementation process is:

Put in the smart sliding sleeve to open the tool fisher, and its expansion spring catches the fishing teeth, lifts up, opens the diversion hole, the upper and lower pressure of the ball seat is connected, continues to lift up, the groove teeth of the tool body are retracted, and the smart slider is extracted. Set of opening devices.

After the sliding sleeve opening tool has been salvaged, if the sliding sleeve needs to be closed, the intelligent sliding sleeve closing tool is lowered into the pipe string to close the sliding sleeve. The specific implementation process is:

The closing tool of the intelligent sliding sleeve is lowered into the inner cylinder of the matching sliding sleeve through the locator. The principle is the same as that of the opening tool. Since the closing tool has matching reverse groove teeth, after the reverse groove teeth are anchored, the pipe string is lifted up and the slide The sleeve inner cylinder moves up to close the sandblasting port, the sliding sleeve is closed, and at the same time the locator is squeezed, the groove teeth of the closing tool exit the matching groove teeth of the sliding sleeve core tube, and the closing tool is taken out.

It can be seen from the above that the utility model satisfies the staged fracturing transformation of unlimited stages of fracturing wells, realizes combined layer opening well drainage and combined layer gas recovery, effectively reduces construction operation costs, and improves oil and gas field development benefits.

The utility model is mainly suitable for infinite stage fracturing and acidification of oil and natural gas horizontal wells.

The utility model is also suitable for oil and natural gas vertical wells and directional wells with unlimited levels of multilayer and layered fracturing and acidification.

Claims (6)

1. an anchor fluke formula sliding sleeve is opened instrument, it is characterized in that

It is the tubular assembly that can insert intelligent sliding sleeve (1) inside and mate with intelligent sliding sleeve (1) that described anchor fluke formula sliding sleeve is opened instrument (3); It is made up of seal, ball cage assembly and three sections cylindrical shells of cutting ferrule assembly to the upper end from the lower end successively; Said intelligent sliding sleeve is opened double wedge and the groove that inner core (1.3) that the groove tooth forward that has on the cutting ferrule assembly external surface of instrument with inner core (1.3) inwall of intelligent sliding sleeve (1) agrees with and can promote intelligent sliding sleeve (1) moves to the lower end;

The seal that said anchor fluke formula sliding sleeve is opened instrument (3) comprises packing assembly B-1 (3.1), the packing assembly B-2 (3.2) at its cylindrical shell two ends and is positioned at described seal tubaeform compound ball seat B (3.3) topmost;

Said anchor fluke formula sliding sleeve is opened the internal diameter of cylindrical shell the first half of instrument (3) ball cage assembly greater than the internal diameter of the latter half, in described ball cage assembly, be provided with one by be positioned at the first half on ball cage B (3.7) and be positioned at the ball cage that ball cage B (3.6) forms under the latter half; Having one group of perforate on described upward ball cage B (3.7) the cage wall communicates with the inner space of cylindrical shell the first half; The inwall of described ball cage B (3.6) bottom down and this section cylindrical shell the latter half is close to, and the internal diameter of following ball cage B (3.6) bottom dwindles gradually and perforate bottom puts in the compound ball seat B (3.3) of said seal upper end; In the described ball cage B (3.6) down the spheroid B (3.5) of a diameter greater than following ball cage B (3.6) bottom perforate arranged; Described ball cage B (3.6) down middle part has the pod apertures B (3.8) that is communicated with ball cage interior or exterior space; Described compound ball seat B (3.3) is provided with the sealing ring B (3.4) that cooperates with described ball cage B (3.6) bottom down; The outer setting of the described ball cage B (3.7) of going up upper end has the tooth B (3.9) of salvaging; And the first half of described ball cage assembly cylindrical shell is beginning corresponding to radial position place of salvaging tooth B (3.9), and its internal diameter upwards is contracted to the maximum outside diameter less than the described ball cage B (3.7) of going up gradually;

Said anchor fluke formula sliding sleeve is opened the cutting ferrule assembly of instrument (3) and is made up of the shell fragment (3.10) that one group of root is connected said ball cage assembly cylindrical shell upper end; The external surface of described shell fragment (3.10) be provided with described intelligent sliding sleeve (1) inner core (1.3) on annular groove and double wedge forward agree with and can promote double wedge and the groove that inner core (1.3) moves down, the double wedge of shell fragment (3.10) external surface and the top of groove and the below be provided with the last locating slot (1.5) and the interior limiting tooth (3.11) of following locating slot (1.6) that can be stuck in intelligent sliding sleeve (1) inner core (1.3) inwall.

2. anchor fluke formula sliding sleeve as claimed in claim 1 is opened instrument, it is characterized in that:

Described intelligent sliding sleeve (1) is in sleeve pipe or the oil pipe, coaxial with sleeve pipe or oil pipe for being connected, with the tubular equipment of external diameter;

The two ends of described intelligent sliding sleeve (1) are the sliding sleeve joint (1.1) that is connected with sleeve pipe or oil pipe; Between the sliding sleeve joint (1.1) for the urceolus (1.2) identical with two ends sliding sleeve joints (1.1) connection, external diameter and sleeve pipe or oil pipe and be shorter in length than urceolus (1.2) and its two ends outer wall and urceolus (1.2) inwall between form movable sealing and can be in urceolus (1.2) axially movable inner core (1.3);

The barrel of described urceolus (1.2) upper end has sand jet outlet (1.4); When inner core (1.3) moves to the position near urceolus (1.2) lower end by the position of being close to urceolus (1.2) upper end of initial state, inner core (1.3) upper end moves to the lower end of sand jet outlet (1.4) and exposes sand jet outlet (1.4);

There is a component to be distributed in annular groove and double wedge on the inwall of inner core (1.3), that spacing differs in the described inner core (1.3) vertically;

On described inner core (1.3) inwall the top of annular groove and double wedge and the below be respectively arranged with upper limit position groove (1.5) and lower limit groove (1.6).

3. anchor fluke formula sliding sleeve as claimed in claim 1 is opened instrument, it is characterized in that:

The latus rectum of ball cage bottom perforate was the same under all intelligent sliding sleeves were opened in the instrument (3) in described one group.

4. intelligent sliding sleeve as claimed in claim 1 is opened instrument, it is characterized in that:

The sectional area that described intelligent sliding sleeve is opened in the instrument (3) one group of perforate in the ball cage on each is equal to or greater than down the sectional area of ball cage bottom perforate.

5. anchor fluke formula sliding sleeve as claimed in claim 1 is opened instrument, it is characterized in that:

Described intelligent sliding sleeve is opened the tooth-shape structure that is furnished with a circle sand control card among packing assembly A-1 (3.1) and the packing assembly A-2 (3.2) at the seal two ends in the instrument (3) on the cross section annular outer surface.

6. anchor fluke formula sliding sleeve as claimed in claim 1 is opened instrument, it is characterized in that:

The latus rectum of ball cage bottom perforate was the same under described one group of anchor fluke formula sliding sleeve was opened in the instrument (3);

The sectional area that described anchor fluke formula sliding sleeve is opened in the instrument (3) one group of perforate in the ball cage on each is equal to or greater than down the sectional area of ball cage bottom perforate;

Described anchor fluke formula sliding sleeve is opened the tooth-shape structure that is furnished with a circle sand control card among packing assembly A-1 (3.1) and the packing assembly A-2 (3.2) at the seal two ends in the instrument (3) on the cross section annular outer surface.

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