A water control completion open hole packer and its setting tool and method

Abstract

The application relates to a water control completion open hole packer and a setting tool and method thereof, the packer comprising a piston movement mechanism, a cylinder sleeve and a packer body, the cylinder sleeve being sleeved on the packer body and leaving a cavity between the cylinder sleeve and the packer body, a piston being arranged in the cavity, and a pressure transmission through hole being arranged on the packer body and being communicated with the cavity; a piston retreat prevention mechanism, comprising a retreat prevention ring and a retreat prevention fixing ring, both being sleeved on the downstream of the piston and being located in the cavity, the retreat prevention fixing ring being located downstream of the retreat prevention ring, and a setting pin being arranged on the retreat prevention fixing ring; and a self-sealing rubber sleeve assembly, comprising a plurality of self-sealing rubber sleeves, the self-sealing rubber sleeves being serially sleeved on an extension pipe, the extension pipe being sleeved on the downstream end of the packer body, and a push sleeve being further sleeved on the upstream end of the extension pipe, the downstream end of the push sleeve being connected with the self-sealing rubber sleeve, the upstream end of the push sleeve being connected with a piston cap, the piston cap being sleeved on the packer body and being located at the downstream end of the piston, and the piston cap being in time abutted with the retreat prevention fixing ring.

Description

TECHNICAL FIELD

[0001] The present application relates to a water control completion open hole packer and its setting tool and method, and belongs to the technical field of oil drilling and production equipment. BACKGROUND

[0002] In the process of oilfield exploitation, the influence of water layer is inevitable. Most of the oil wells have a short water-free oil production period and a rapid water cut increase. By effectively controlling the flow of formation water, the invasion of water into the oil well can be reduced, and the crude oil production can be improved. As an important water control technology, the open hole packer plays an important role in offshore oil well exploitation. By using the packer to isolate the well section, the flow of formation water in the wellbore can be effectively controlled, thereby reducing the risk of water flooding of the entire producing layer section.

[0003] At present, the open hole packer commonly used in the field adopts a self-expanding sealing process. This method is the simplest, but the self-expanding open hole packer needs a long time to set, and the sealing pressure after setting is low, so the sealing effect is difficult to ensure, and therefore it has its own application shortcomings. The hydraulic compression setting process is more reliable in setting mode. The hydraulic mechanical action is used to ensure the sealing of the open hole packer, and the packer has high pressure resistance. The setting process has simple and complex according to different application occasions. The simple string does not have a screen pipe or a perforated pipe, and can be directly set by one-time pressing, and then the sliding sleeve is opened for production. The one with a screen pipe and a perforated pipe needs to set the packer layer by layer, and the process is relatively complex. SUMMARY

[0004] In view of the above technical problems, the present application provides a water control completion open hole packer and its setting tool and method. The packer is suitable for sealing of open hole wells, especially for sealing of irregular open hole wells and open hole wells with large expansion rate. Compared with the ordinary open hole packer, the packer of the present application has higher pressure resistance after expanding in the open hole, can seal larger size open hole, can seal irregular open hole, and has a wide range of applications. The setting method of the present application can be applied to the completion mode with water control screen pipe, and can realize one-time setting of all open hole packers, simplifying the operation process and improving the efficiency of field operation.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] A water control completion open hole packer, comprising:

[0007] A piston movement mechanism, comprising a packer body and a cylinder sleeve, the cylinder sleeve being sleeved on the packer body and leaving a cavity therebetween, a piston being arranged in the cavity, and a pressure transmission through hole being arranged on the packer body and communicating with the cavity;

[0008] A piston stop mechanism comprises a stop ring and a stop fixed ring, both of which are sleeved downstream of the piston and located in the cavity, the stop fixed ring is located downstream of the stop ring, and a setting pin is arranged on the stop fixed ring;

[0009] A self-sealing rubber sleeve assembly comprises a plurality of self-sealing rubber sleeves, the plurality of self-sealing rubber sleeves are sequentially sleeved on an extension pipe, the extension pipe is sleeved on a downstream end of the packer body, an upstream end of the extension pipe is also sleeved with a push sleeve, a downstream end of the push sleeve is connected with the self-sealing rubber sleeve, an upstream end of the push sleeve is connected with a piston cap, the piston cap is sleeved on the packer body and located at a downstream end of the piston, and the piston cap is in time abutted with the stop fixed ring.

[0010] Preferably, a thread is arranged on an outer wall surface of the piston, a thread is also arranged on an inner wall surface of the stop ring, and the stop fixed ring is connected with the cylinder sleeve through the threads.

[0011] Preferably, the self-sealing rubber sleeve assembly further comprises two rubber sleeve shoulder guards, and the two rubber sleeve shoulder guards are sleeved on two ends of the self-sealing rubber sleeve respectively.

[0012] Preferably, the self-sealing rubber sleeve assembly further comprises a plurality of spacer rings, and the plurality of spacer rings are sleeved between adjacent two self-sealing rubber sleeves.

[0013] Preferably, a groove is arranged on one side of the self-sealing rubber sleeve in contact with the extension pipe; and / or,

[0014] A radial hole is arranged on the self-sealing rubber sleeve.

[0015] The second aspect of the present application provides a setting completion tool, which comprises the water control completion open hole packer in any one of the above aspects, and further comprises:

[0016] An outer pipe string comprises a blind pipe, a plurality of AICD water control screen pipes are sleeved on an outer wall of the blind pipe at intervals, an open hole packer is sleeved between adjacent AICD water control screen pipes, and a well flushing leading shoe is arranged at a forward end of the blind pipe.

[0017] An inner pipe string comprises a drill pipe, the drill pipe comprises a central pipe, a circulation hole short section and a round plug which are sequentially connected in series.

[0018] Preferably, a top packer is further sleeved on an upstream end of the blind pipe, a top packer sealing sleeve is sleeved on an inner wall of the blind pipe, and a well flushing sealing sleeve is sleeved on an inner wall of a downstream end of the blind pipe.

[0019] The setting completion well tool, preferably, the top packer service tool and the upper isolation sealing element are sleeved on the outer wall of the upstream end of the drill pipe.

[0020] The setting completion well tool, preferably, the top packer service tool and the upper isolation sealing element are sleeved on the outer wall of the upstream end of the drill pipe.

[0021] The third aspect of the present application provides an operating method of a setting completion well tool, comprising the following steps:

[0022] After the outer pipe column is connected with the inner pipe column, the drill pipe is sent to a predetermined position in the well, the top packer service tool is connected with the top packer together and kept in a locked state, the well flushing isolation sealing element is located in the well flushing sealing cylinder, the circulation hole of the circulation hole nipple is located at the lower end of the well flushing sealing cylinder, the well flushing guide shoe can be opened for circulation under the action of the positive pressure, and the well flushing guide shoe is reversely closed.

[0023] The setting ball is thrown to the top packer service tool, the inner pipe column is pressed to set and hang the top packer, then the inner pipe column is pressed to release the service tool, the inner pipe column and the outer pipe column can be separated, the ball seat is dropped on the ball catcher of the release service tool, and the injection circulation in the inner pipe column and the outer pipe column is not affected.

[0024] The inner pipe column is lifted, the upper isolation sealing element enters the top packer sealing cylinder, and the lower isolation sealing element enters the well flushing sealing cylinder, at this time, under the joint action of the outer pipe column, the upper isolation sealing element and the lower isolation sealing element, the outer pipe column forms a closed state from the inside to the open hole annulus direction, the liquid injected through the circulation hole of the circulation hole nipple cannot enter the stratum through the AICD water control screen pipe, the inner pipe column is pressed to form pressure in the outer pipe column, thereby setting multiple open hole packers, the inner pipe column is pressurized, the open hole packer is expanded and sealed to the wellbore under the action of the hydraulic pressure, all the open hole packers are set at one time, and the open hole packer remains in the set state after pressure relief.

[0025] After the open hole packer is set, the inner pipe column can be lifted, and the operation is completed.

[0026] The present application has the following advantages due to the above technical scheme:

[0027] 1. Existing self-sealing rubber packers expand by absorbing oil, water, oil-water mixtures, or other liquid materials. When encountering a large open-hole enlargement ratio, there is a possibility of incomplete expansion. Even if expansion is complete, the rubber strength is low and the pressure resistance is weak. The compression-type self-sealing rubber packer of this invention, through mechanical compression, expands the packer to the well wall, resulting in high rubber strength and strong pressure resistance. Furthermore, its pressure resistance is further enhanced through self-expansion.

[0028] 2. Conventional compression packers, after mechanical compression, are difficult to apply to open holes with large wellbore enlargement ratios. For irregular open holes, compression makes it difficult to achieve a seal. However, the compression self-sealing rubber sleeve packer of this invention (i.e., water-controlled completion open hole packer), after compression and expansion, can automatically fill the irregular wellbore shape using its self-sealing properties to achieve a seal in cases where the open hole diameter is irregular.

[0029] 3. The setting tool of this invention, through the coordinated action of the completion water control outer tubing string and the service inner tubing string, can efficiently set multiple open-hole packers at once, saving operation time, improving operational safety, and increasing operational efficiency on-site. The matching compression-type self-sealing rubber packer (i.e., the water control completion open-hole packer) effectively solves the sealing problem of compression packers in wellbore with large well enlargement ratios, and effectively solves the pressure resistance problem of self-sealing rubber packers, thus having a wide range of applications. This open-hole packer and setting tool have broad application prospects in water control completion applications. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a water-controlled well completion open hole packer provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the piston movement mechanism in the packer provided in this embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the piston anti-reverse mechanism in the packer provided in this embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the self-sealing rubber sleeve assembly in the packer provided in this embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram showing the state of the packer after it has been set in this embodiment of the invention.

[0035] Figure 6 Figure 1 shows a comparison of the sealing properties of existing self-sealing rubber sleeves and the compression self-sealing rubber sleeve of the present invention. Figure 2 shows the sealing state of the existing self-sealing rubber sleeve after mechanical compression, and Figure 3 shows the self-sealing state of the compression self-sealing rubber sleeve of the present invention after mechanical compression in contact with well fluid.

[0036] Figure 7 The sealing comparison diagram of the existing ordinary compression packer and the compression self-sealing rubber sleeve packer of the present application in the irregular well wall, wherein figure a is a sealing schematic diagram of the existing ordinary compression packer in the irregular well wall, and figure b is a sealing schematic diagram of the compression self-sealing rubber sleeve packer of the present application in the irregular well wall;

[0037] Figure 8 The schematic diagram of the setting completion well completion tool provided by the embodiment of the present application;

[0038] Figure 9 The production state diagram of the setting completion well completion tool after the operation of the embodiment of the present application is completed;

[0039] Figure 10 The schematic diagram of the setting completion well completion tool provided by the embodiment of the present application after being lowered into the well and being in place, breaking the glue and circulating to wash the well, and removing the wellbore mud cake;

[0040] Figure 11 The schematic diagram of the setting completion well completion tool provided by the embodiment of the present application after removing the wellbore mud cake, setting the setting ball, and making the inner string and the outer string separate;

[0041] Figure 12 The schematic diagram of the setting completion well completion tool provided by the embodiment of the present application, which sets all open hole packers at one time, and the open hole packer remains in the setting state after pressure relief;

[0042] Figure 13 The schematic diagram of the setting completion well completion tool provided by the embodiment of the present application after the open hole packer is set, the inner string is pulled out, and the operation is completed;

[0043] The reference signs in the drawings are as follows:

[0044] 1-packer body; 2-piston; 3-cylinder sleeve; 4-retaining ring; 5-retaining fixed ring; 6-setting pin; 7-piston cap; 8-push cylinder; 9-extension pipe; 10-rubber sleeve shoulder; 11-self-sealing rubber sleeve; 12-separation ring; 13-lower joint; 14-sealed casing or wellbore; 15-string connected with the packer; 16-irregular well wall; 17-ordinary compression rubber; 18-self-expanding rubber; 19-top packer; 20-sealing sleeve of the top packer; 21-blind pipe; 22-wellbore; 23-open hole packer; 24-AICD water control screen pipe; 25-washing sealing sleeve; 26-washing leading shoe; 27-drill pipe; 28-top packer service tool; 29-upper isolation sealing element; 30-central pipe; 31-washing isolation sealing element; 32-lower isolation sealing element; 33-circulation hole nipple; 34-round plug. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application are clearly and completely described below. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0046] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by those skilled in the art to which the present application pertains. The terms "first", "second", "third", "fourth" and similar words used in the present application do not indicate any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar words mean that the components or objects before the words cover the components or objects listed after the words and their equivalents, and do not exclude other components or objects. The terms "connect" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect.

[0047] For the convenience of description, spatial relative terms can be used in the description to describe the relationship of one element or feature relative to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0048] The self-expanding sealing process is currently used in the field for the bare hole packer, which is the simplest way, but the self-expanding sealing bare hole packer needs a long time to set, and the sealing pressure is low after setting, so the sealing effect is difficult to ensure, and therefore it has its own application shortcomings; the hydraulic compression setting process is more reliable in setting, and uses hydraulic mechanical action to ensure the sealing of the bare hole packer, and has high pressure resistance. The setting process has simple and complex according to different application occasions, the simple pipe string has no screen pipe or perforating pipe, and can be directly set by one-time pressing, and then the sliding sleeve is opened for production, and the perforating pipe with screen pipe needs to be set layer by layer, and the process is relatively complex.

[0049] Based on the above technical problems, the application provides a water control completion open hole packer and a setting method thereof, the packer is suitable for open hole sealing, especially for irregular open hole and open hole with large expansion rate. Compared with the ordinary open hole packer, the packer has higher pressure resistance after open hole expansion, can seal larger open hole and irregular open hole, and has a wide range of applications. The setting method can be applied to the completion method with water control screen pipe, and can realize one-time setting of all open hole packers, simplify the operation process and improve the field operation efficiency.

[0050] As shown in Figures 1-5 , the water control completion open hole packer comprises:

[0051] A piston movement mechanism comprises a packer body 1 and a cylinder sleeve 3, the cylinder sleeve 3 is sleeved on the packer body 1 and a cavity is left between the two, a piston 2 is arranged in the cavity, the packer body 1 is provided with a pressure transmission hole (after the packer body 1 is pressed by a service tool, pressure acts on the left end face of the piston 2, the piston 2 is pushed to move, and the movement of the piston 2 will cut the setting pin 6, and from then on the hydraulic pressure is converted into mechanical thrust for the setting movement of the packer) which is in communication with the cavity; a piston retreat prevention mechanism comprises a retreat prevention ring 4 and a retreat prevention fixing ring 5, both of which are sleeved downstream of the piston 2 and located in the cavity, the retreat prevention fixing ring 5 is located downstream of the retreat prevention ring 4, and the retreat prevention fixing ring 5 is provided with a setting pin 7; a self-sealing rubber tube assembly comprises a plurality of self-sealing rubber tubes 11, the plurality of self-sealing rubber tubes 11 are serially sleeved on an extension pipe 9, the extension pipe 9 is sleeved on the downstream end of the packer body 1, the upstream end of the extension pipe 9 is also slidably sleeved with a push tube 8, the downstream end of the push tube 8 is connected with the self-sealing rubber tube 11, the upstream end of the push tube 8 is connected with a piston cap 7, the piston cap 7 is slidably sleeved on the packer body 1 and located at the downstream end of the piston 2, and timely abuts against the retreat prevention fixing ring 5.

[0052] Further, as shown in Figure 2 , 3 , a thread is arranged on the outer wall surface of the piston 2, a thread is also arranged on the inner wall surface of the retreat prevention ring 4, and the retreat prevention fixing ring 5 is connected with the cylinder sleeve 3 through the thread. The thread direction of the retreat prevention ring 4 affects the movement of the piston 2, which can only move in one direction, and the movement in the opposite direction is limited. When the piston 2 moves to the final position, the retreat prevention ring 4 locks the position of the piston 2 through the thread. The retreat prevention fixing ring 5 is connected with the cylinder sleeve 3 through the thread, which limits the movement of the retreat prevention ring 4.

[0053] Further, as shown in Figure 4As shown, the self-sealing rubber sleeve assembly further comprises two rubber sleeve shoulder 10, two rubber sleeve shoulder 10 is respectively set in the two ends of the self-sealing rubber sleeve 11. The self-sealing rubber sleeve assembly further comprises a plurality of spacer ring 12, a plurality of spacer ring 12 is set between two adjacent self-sealing rubber sleeve 11. Preferably, the self-sealing rubber sleeve 11 is provided with a groove on the side in contact with the extension pipe 9;A radial hole is formed on the self-sealing rubber sleeve 11.

[0054] As shown in the drawings, Figure 4 The present application takes three rubber sleeves as an example. The rubber sleeve shoulder 10 is a relatively thin metal ring with partial wire cutting, which has a certain expansion property. During the rubber expansion process, the rubber sleeve shoulder 10 has a certain deformation, which can assist the expansion of the self-sealing rubber sleeve 11, improve the pressure resistance of the self-sealing rubber sleeve 11 after expansion, and the spacer ring 12 helps the self-sealing rubber sleeve 11 to expand according to the preset expansion effect during the extrusion process, preventing the self-sealing rubber sleeve 11 from being misaligned. The self-sealing rubber sleeve 11 can automatically expand and seal the annulus of the wellbore in the liquid environment of the wellbore. In terms of structure, the self-expanding rubber sleeve has a groove inside and a small hole in the middle, which can make the rubber sleeve expand according to the designed expansion shape.

[0055] The self-sealing rubber sleeve 11 (the rubber of the self-sealing rubber sleeve 11 is known rubber) of the present application is made of oil-absorbing or water-absorbing or oil-water mixture or other liquid materials. When in use, the packer is pressed by using the inner string, the hydraulic pressure pushes the piston 2, the piston 2 pushes the self-sealing rubber sleeve 11 to expand the annulus between the outer string and the open hole, and after the self-sealing rubber sleeve 11 is compressed in place, the self-sealing rubber sleeve 11 always maintains the compressed expansion state due to the effect of the packer stop ring 4. In addition, for wells with large wellbore expansion rate or irregular wellbore, the self-sealing rubber sleeve can further expand by absorbing the liquid in the wellbore, thereby sealing larger wellbores or irregular wellbores.

[0056] As shown in the drawings, Figure 8 The present application also relates to a setting completion tool, which comprises the above-mentioned water control completion open hole packer and further comprises: an outer string, the outer string comprises a blind pipe 21, a plurality of AICD water control screen pipes 24 are sleeved on the outer wall of the blind pipe 21 at intervals, an open hole packer 23 is sleeved between adjacent AICD water control screen pipes 24, and a well flushing leading shoe 26 is arranged at the front end of the blind pipe 21;An inner string, the inner string comprises a drill pipe 27, the drill pipe 27 comprises a central pipe 30, a circulation hole short section 33 and a round plug 34 connected in series.

[0057] In some preferred embodiments of the present application, as shown in the drawings, Figure 8 The upstream end of the blind pipe 21 is further provided with a top packer 19 on the outer wall, and a top packer sealing sleeve 20 is sleeved on the inner wall of the blind pipe 21, and the downstream end of the blind pipe 21 is further provided with a well flushing sealing sleeve 25 on the inner wall.

[0058] Further, the upstream end of the drill pipe 27 is sleeved with a top packer service tool 28 and an upper isolation seal 29. The downstream end of the drill pipe 27 is sleeved with a well flushing isolation seal 31, and the outer wall of the circulation hole nipple 33 is sleeved with a lower isolation seal 32.

[0059] The setting and completion tool provided by the application comprises an outer pipe string with segmented water control and sand prevention function and an inner pipe string with packer setting service. After the outer pipe string and the inner pipe string are connected at the wellhead, they are sent downhole to a designated position by the drill pipe 27. After being positioned, the setting of all packers on the outer pipe string is completed through hydraulic and mechanical actions. The completion process can set multiple open hole packers 23 at one time. Compared with setting multiple open hole packers 23 one by one, setting multiple open hole packers 23 at one time has extremely high timeliness and safety.

[0060] As shown in Figures 10-13 The application also relates to a method for operating the setting and completion tool, which comprises the following steps:

[0061] After the outer pipe string and the inner pipe string are connected, they are sent downhole to a designated position by the drill pipe 27. After the outer pipe string and the inner pipe string are positioned, the top packer service tool 28 is connected with the top packer 19 and kept in a locked state. The well flushing isolation seal 31 is located in the well flushing seal cylinder 25, and the circulation hole of the circulation hole nipple 33 is located at the lower end of the well flushing seal cylinder 25. The well flushing guide shoe 26 can open the circulation under the action of the positive pressure, and the well flushing guide shoe 26 is reversely closed. The liquid is injected in the inner pipe string and then circulated to the annulus between the open hole packer 23 and the outer pipe string, so that the gel breaking and well flushing are performed, and the wellbore cake is removed, as shown in Figure 10 .

[0062] The setting ball is set to the top packer service tool 28. The inner pipe string is pressed to set and hang the top packer 19. Then, the inner pipe string and the outer pipe string are disconnected by pressing the release service tool. The ball seat is dropped on the ball catcher of the release service tool, without affecting the liquid injection circulation in the inner pipe string and the outer pipe string, as shown in Figure 11 .

[0063] The inner pipe string is lifted, the upper isolation seal 29 enters the top packer seal cylinder 20, and the lower isolation seal 32 enters the well flushing seal cylinder 25. At this time, under the joint action of the outer pipe string, the upper isolation seal 29 and the lower isolation seal 32, the outer pipe string forms a closed state from the inside to the open hole annulus direction. The liquid injected through the circulation hole of the circulation hole nipple 33 cannot enter the stratum through the AICD water control screen pipe 24. The inner pipe string is pressed to build pressure in the outer pipe string, so that the multiple open hole packers 23 are set. The inner pipe string is pressurized, the open hole packer 23 is inflated and sealed to the wellbore under the action of the hydraulic pressure, all the open hole packers 23 are set at one time, and the open hole packer 23 remains in the set state after pressure relief, as shown inFigure 12 As shown;

[0064] After the open-eye packer 23 is set, the inner tubing can be removed, and the operation is complete. Figure 13 As shown.

[0065] like Figure 9 As shown, this is the production state after the operation is completed: the formation fluid is isolated by the open hole packer 23, enters the AICD water control screen 24 or AICD short section from its respective section, enters the screen pipe from the AICD valve, and flows out from the wellbore to the wellhead.

[0066] like Figure 5 As shown, the working principle of the naked-eye occluder 23 is as follows:

[0067] The fluid inside the open-hole packer 23 is pressurized. The fluid transmits pressure to the piston 2 through the pressure transmission hole on the packer body 1. The hydraulic pressure is converted into mechanical thrust on the piston 2. When the piston 2 moves, it shears the setting pin 6. Under the continuous action of hydraulic pressure, the piston 2, piston cap 7, and pusher 8 move towards the self-sealing rubber sleeve 11, pushing and squeezing the self-sealing rubber sleeve 11. Under the action of mechanical force, the self-sealing rubber sleeve 11 expands and seals the wellbore, achieving the purpose of sealing the packer annulus. After depressurization, when the piston 2 moves to its final position, the reverse movement of the piston 2 is restricted by the thread direction of the anti-reverse ring 4. The anti-reverse ring 4 locks the position of the piston 2 through the thread, and the packer remains in a seated and sealed state. Under the wellbore fluid environment conditions, the self-sealing rubber sleeve 11 can further expand after being soaked for several days, which can seal irregular wellbores and further enhance its pressure resistance.

[0068] like Figure 6 As shown, where Figure 6 In this context, 'a' refers to an existing self-sealing rubber packer. Because it expands by absorbing oil, water, an oil-water mixture, or other liquid materials, it may not expand completely when encountering a large open-hole enlargement rate. Even if it expands completely, the rubber strength is low, resulting in weak pressure resistance. The compression-type self-sealing rubber packer of this invention, however, uses mechanical compression to expand the packer to the well wall. It has high rubber strength and strong pressure resistance, and its pressure resistance is further enhanced by its own expansion. Figure 6 As shown in b in the figure.

[0069] like Figure 7 As shown, where Figure 7 In this context, 'a' refers to a standard compression packer, which, after mechanical compression, is difficult to apply to open holes with large borehole enlargement ratios. For irregular open holes, compression is insufficient to achieve a seal. However, as... Figure 7As shown in b in the figure, the compression type self-sealing rubber sleeve packer of the present application can automatically fill the irregular wellbore and realize sealing by using the self-sealing property of the self-sealing rubber sleeve when the compression expansion is encountered in the case of irregular shape of the open hole wellbore.

[0070] The water control completion open hole packer and the setting tool thereof can efficiently realize one-time setting of multiple open hole packers 23 through the cooperation of the completion water control outer string and the service inner string, can save operation time on site, improve operation safety and efficiency. The matched compression type self-sealing rubber sleeve packer (i.e. open hole packer 23) can effectively solve the sealing problem of the compression type packer in the wellbore with large expansion rate, effectively solve the pressure resistance problem of the self-sealing rubber packer, and has a wide application range. The open hole packer 23 and the setting tool thereof have a wide application prospect in the application of water control completion.

[0071] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A setting completion tool comprising a water control completion open hole packer, characterized in that, Also comprising: an outer pipe column comprising a blind pipe (21), a plurality of AICD water control screens (24) are sleeved on the outer wall of the blind pipe (21) at intervals, open hole packers (23) are sleeved between adjacent AICD water control screens (24), and a well flushing leading shoe (26) is arranged at the front end of the blind pipe (21); an inner pipe column comprising a drill pipe (27), the drill pipe (27) comprising a central pipe (30), a circulation hole short section (33) and a round plug (34) connected in series; a top packer (19) is further sleeved on the outer wall of the upstream end of the blind pipe (21), and a top packer sealing cylinder (20) is sleeved on the inner wall of the blind pipe (21), and a well flushing sealing cylinder (25) is sleeved on the inner wall of the downstream end of the blind pipe (21); a top packer service tool (28) and an upper isolation sealing element (29) are sleeved on the outer wall of the upstream end of the drill pipe (27); a well flushing isolation sealing element (31) is sleeved on the outer wall of the downstream end of the drill pipe (27), and a lower isolation sealing element (32) is sleeved on the outer wall of the circulation hole short section (33); the open hole packer for water control completion comprises: a piston movement mechanism comprising a packer body (1) and a cylinder sleeve (3), the cylinder sleeve (3) being sleeved on the packer body (1) and leaving a cavity therebetween, a piston (2) being arranged in the cavity, and a pressure transmission through hole being arranged on the packer body (1) and communicating with the cavity; a piston retreat prevention mechanism comprising a retreat prevention ring (4) and a retreat prevention fixing ring (5), both being sleeved downstream of the piston (2) and located in the cavity, the retreat prevention fixing ring (5) being located downstream of the retreat prevention ring (4), and a setting pin (6) being arranged on the retreat prevention fixing ring (5); a self-sealing rubber sleeve assembly comprising a plurality of self-sealing rubber sleeves (11), the plurality of self-sealing rubber sleeves (11) being connected in series and sleeved on an extension pipe (9), the extension pipe (9) being sleeved on the downstream end of the packer body (1), the upstream end of the extension pipe (9) further sleeving a push sleeve (8), the downstream end of the push sleeve (8) being connected with the self-sealing rubber sleeve (11), the upstream end of the push sleeve (8) being connected with a piston cap (7), and the piston cap (7) being sleeved on the packer body (1) and located at the downstream end of the piston (2), and timely abutting against the retreat prevention fixing ring (5).

2. The setting completion tool of claim 1, wherein, The outer wall surface of the piston (2) is provided with threads, the inner wall surface of the retreat prevention ring (4) is also provided with threads, and the retreat prevention fixing ring (5) is connected with the cylinder sleeve (3) through threads.

3. The setting completion tool of claim 1, wherein, The self-sealing rubber sleeve assembly further comprises two rubber sleeve shoulder guards (10), and the two rubber sleeve shoulder guards (10) are respectively sleeved on both ends of the self-sealing rubber sleeve (11).

4. The setting completion tool of claim 1, wherein, The self-sealing rubber sleeve assembly further comprises a plurality of spacer rings (12), and the plurality of spacer rings (12) are sleeved between adjacent two self-sealing rubber sleeves (11).

5. The setting completion tool of claim 1, wherein, The side of the self-sealing rubber sleeve (11) in contact with the extension pipe (9) is provided with a groove; and / or, Radial holes are arranged on the self-sealing rubber sleeve (11).

6. A method of operating a setting completion tool according to claim 1, characterized in that, comprising the following steps: After the outer string and the inner string are connected, the drill pipe (27) is sent to a predetermined position in the well, the outer string and the inner string are lowered to the position, the top packer service tool (28) is connected with the top packer (19) and kept in a locked state, the well flushing isolation seal (31) is located in the well flushing seal cylinder (25), the circulation hole of the circulation hole nipple (33) is located at the lower end of the well flushing seal cylinder (25), the well flushing shoe (26) can be opened for circulation under the action of a positive pressure, and the well flushing shoe (26) is reversely closed, the inner string is pressurized to inject liquid, the liquid is circulated from the inner string to the annulus between the open hole packer (23) and the outer string, gel breaking and well flushing are performed, and wellbore mud cake is removed; A ball is dropped into the top packer service tool (28), the inner string is pressurized to be set and hung on the top packer (19), then a hand-off service tool is pressurized, the inner string and the outer string are separated, a ball seat is dropped on a ball catcher of the hand-off service tool, and the injection circulation in the inner string and the outer string is not affected; The inner string is pulled up, the upper isolation seal (29) enters the top packer seal cylinder (20), and the lower isolation seal (32) enters the well flushing seal cylinder (25), at this time, under the joint action of the outer string, the upper isolation seal (29) and the lower isolation seal (32), the outer string is in a closed state from the inside to the open hole annulus direction, liquid injected through the circulation hole of the circulation hole nipple (33) cannot enter the stratum through the AICD water control screen pipe (24), the inner string is pressurized to be pressurized in the outer string, so that multiple open hole packers (23) are set, the inner string is pressurized, the open hole packer (23) is expanded and sealed to the wellbore under the action of the hydraulic pressure, all the open hole packers (23) are set at one time, and the open hole packer (23) remains in the set state after pressure relief. After the open hole packer (23) is set, the inner string can be pulled out, and the operation is completed.

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