阅读说明：本技术 逐级定向水力喷射分层压裂管柱 (Step-by-step directional hydraulic jet separate layer fracturing string ) 是由 赵三省 李同桂 高涛 李文霞 刘慎成 李有盛 张毅 赵继业 于 2020-05-27 设计创作，主要内容包括：本发明涉及井下压裂装置技术领域,是一种逐级定向水力喷射分层压裂管柱,其包括由上至下串接在连续油管上的水力锚、完井滑套、逐级压裂总成、单流阀、筛管和导向头,逐级压裂总成包括至少两个由上至下串接在一起的压裂组件。本发明结构合理而紧凑,使用方便,通过设置第一滑套和第一剪钉,便于投球实现逐级开始座封；通过设置扩径环槽,使下行的第一滑套下部径向向外扩张,实现憋压球继续下落；通过在喷射器本体上设置不对称分布的喷射孔,能够实现在原压裂缝网不同方位开启新缝；通过设置第二滑套和第二剪钉,便于投球实现逐级打开喷射器本体上的喷射孔,具有稳定、易形成新缝和便于控制的特点。(The invention relates to the technical field of underground fracturing devices, in particular to a step-by-step oriented hydraulic jet layered fracturing string which comprises a hydraulic anchor, a well completion sliding sleeve, a step-by-step fracturing assembly, a check valve, a sieve tube and a guide head which are connected with a continuous oil tube in series from top to bottom, wherein the step-by-step fracturing assembly comprises at least two fracturing components which are connected with each other in series from top to bottom. The ball injection device is reasonable and compact in structure and convenient to use, and the ball injection device is convenient for ball injection to start seat sealing step by arranging the first sliding sleeve and the first shear pin; the lower part of the descending first sliding sleeve is radially expanded outwards by arranging the diameter expansion ring groove, so that the pressure build-up ball continuously falls; the novel crack can be opened in different directions of the original crack net by arranging the asymmetrically distributed injection holes on the injector body; through setting up second sliding sleeve and second shear pin, the jet orifice on the sprayer body is opened step by step to the bowling realization of being convenient for, has stably, easily forms new seam and the characteristics of being convenient for control.)

1. A step-by-step directional hydraulic jet layered fracturing string is characterized by comprising a hydraulic anchor, a well completion sliding sleeve, a step-by-step fracturing assembly, a check valve, a sieve tube and a guide head which are connected in series on a continuous oil tube from top to bottom, wherein the step-by-step fracturing assembly comprises at least two fracturing components which are connected in series from top to bottom, each fracturing component comprises a packer, a cross-over oil tube, a centralizer and an ejector which are connected in series from top to bottom, each packer comprises an upper joint, a central tube, a lower joint, a rubber sleeve device and a first sliding sleeve, an upper joint is fixedly arranged on the outer side of the upper part of the central tube, a lower joint is fixedly arranged on the outer side of the lower part of the central tube, a rubber sleeve assembly with expandable liquid inlet is arranged on the outer side of the middle part of the central tube, an expansion gap is arranged between the rubber sleeve assembly and the central tube, a liquid inlet through which the inner tube and the outer tube, the upper end of the first sliding sleeve is positioned above the liquid inlet hole, the lower end of the first sliding sleeve is positioned below the liquid inlet hole, and an expanding ring groove is formed in the inner side of the middle of the lower connector corresponding to the position below the first sliding sleeve; the sprayer includes sprayer body, nozzle and second sliding sleeve, and this internal overflow channel that link up from top to bottom that is equipped with of sprayer, the sprayer body outside along circumferencial direction interval distribution about have at least two can with overflow the jet orifice of passageway intercommunication, equal fixed mounting has the nozzle in the jet orifice, through second shear pin fixed mounting have the second sliding sleeve in the overflow channel, the second sliding sleeve upper end is located the jet orifice top of the position of the top, the second sliding sleeve lower extreme is located the jet orifice below of the position of the bottom.

2. The staged directional hydraulic jet layered fracturing string as recited in claim 1, further comprising an upper fixing assembly, a lower floating assembly and a limiting assembly, wherein the rubber sleeve assembly comprises an outer rubber sleeve, an inner rubber sleeve and supporting bars, the outer side of the middle part of the central tube is sleeved with the inner rubber sleeve, at least two supporting bars are uniformly distributed on the outer side of the inner rubber sleeve along the circumference, the upper ends of the supporting bars are fixedly installed together with the outer side of the upper end of the inner rubber sleeve at corresponding positions, the lower ends of the supporting bars are fixedly installed together with the outer side of the lower end of the inner rubber sleeve at corresponding positions, the outer rubber sleeve is sleeved on the outer side of the middle part of the inner rubber sleeve, and the inner side of the middle part of the outer; the upper end of the inner rubber cylinder is fixedly arranged together with the upper joint through an upper fixing assembly, the lower end of the inner rubber cylinder is fixedly provided with a lower floating assembly capable of axially moving along the outer side of the upper part of the lower joint, and the outer side of the middle part of the lower joint corresponding to the lower position of the lower floating assembly is fixedly provided with a limiting assembly.

3. The staged-oriented hydraulic jet layered fracturing string as recited in claim 2, wherein the upper fixing device comprises an upper rubber cylinder base, the outer side of the lower end of the upper joint is fixedly provided with the upper rubber cylinder base, and the inner side of the lower end of the upper rubber cylinder base is fixedly arranged with the inner rubber cylinder; the lower floating assembly comprises a lower rubber cylinder seat, a floating sleeve and a first sealing ring, the outer side of the middle part of the lower joint is provided with the floating sleeve, the upper part of the floating sleeve is positioned above the lower rubber cylinder seat, the floating sleeve comprises a connecting part and a floating part, the outer side of the upper end of the connecting part is fixedly installed with the inner side of the upper end of the floating part, the lower rubber cylinder seat sleeved on the outer side of the lower part of the central pipe is fixedly installed at the lower end of the inner rubber cylinder, the inner side of the lower end of, a sealing ring table is arranged on the outer side of the upper part of the lower joint corresponding to the position below the liquid inlet hole, a sliding vertical groove is arranged on the inner side of the upper end of the floating part corresponding to the position above the sealing ring table, a sliding block is fixedly installed on the outer side of the upper end of the lower joint, the outer end of the sliding block is positioned in the sliding vertical groove, at least one first sealing ring is arranged between the lower rubber cylinder seat and the connecting part at an upper-lower interval, at least one first sealing ring is arranged between the lower joint and the central pipe at an upper-lower interval, and at least one first sealing ring is arranged between the; the limiting assembly comprises a limiting stop ring and a limiting screw, the limiting stop ring is arranged on the outer side of the middle part of the lower connector corresponding to the lower position of the floating assembly, and the limiting stop ring is fixedly installed together with the lower connector through the limiting screw.

4. The staged directional hydraulic jet layered fracturing string as claimed in claim 1, 2 or 3, wherein the right side of the upper part of the injector body is provided with jet holes, and the front side of the lower part of the injector is provided with jet holes; the axis of the injection hole at the right side is a first axis, the projection of the first axis on the horizontal plane is a first projection, the axis of the injection hole at the front side is a second axis, the projection of the second axis on the horizontal plane is a second projection, the included angle between the first projection and the second projection is a first included angle, and the first included angle is 75-150 degrees.

5. The staged directional hydraulic jet layered fracturing string as recited in claim 4, further comprising a first centering block and a second centering block, wherein the first centering block and the second centering block are arranged at intervals on the left rear side of the injector body corresponding to the positions between the jet holes, the angular bisector of the first included angle is a symmetry line, the projection of the first centering block on the horizontal plane is a third projection, the projection of the second centering block on the horizontal plane is a fourth projection, and the third projection and the fourth projection are symmetrical along the symmetry line; or/and the first included angle is 90 degrees.

6. The staged directional hydraulic jet layered fracturing string as claimed in claim 1, 2 or 3, wherein the right side of the upper part of the injector body is provided with jet holes, the front side of the middle part of the injector is provided with jet holes, and the left rear side of the lower part of the injector body is provided with jet holes; the axis of the injection hole positioned at the right side is a third axis, the projection of the third axis on the horizontal plane is a sixth projection, the axis of the injection hole positioned at the front side is a fourth axis, the projection of the fourth axis on the horizontal plane is a seventh projection, the axis of the injection hole positioned at the left rear side is a fifth axis, and the projection of the fifth axis on the horizontal plane is an eighth projection; an included angle between the sixth projection and the seventh projection is a second included angle, the second included angle is between 75 degrees and 150 degrees, an included angle between the seventh projection and the eighth projection is a third included angle, the third included angle is between 75 degrees and 150 degrees, an included angle between the eighth projection and the sixth projection is a fourth included angle, and the fourth included angle is between 75 degrees and 150 degrees.

7. The staged directional hydrajetting staged fracturing string according to claim 6, further comprising a third centering block, a fourth centering block and a fifth centering block, wherein the third centering block is disposed on the left side of the injector body corresponding to the position of the right side jet hole, the fourth centering block is disposed on the rear side of the injector body corresponding to the position of the front side jet hole, and the fifth centering block is disposed on the right front side of the injector body corresponding to the position of the left rear jet hole; or/and the second included angle is 90 degrees, the third included angle is 135 degrees, and the fourth included angle is 135 degrees.

8. The staged directional hydraulic jet layered fracturing string as claimed in claim 1, 2, 3, 5 or 7, wherein the first sliding sleeve comprises a plugging sleeve, elastic claws and second sealing rings, the upper end of the plugging sleeve is located above the liquid inlet hole, the lower end of the plugging sleeve is located below the liquid inlet hole, the elastic claws are fixedly installed at the lower end of the plugging sleeve at intervals along the circumferential direction, a limiting boss is arranged on the outer side of the lower end of each elastic claw, the second sealing ring is arranged between the first sliding sleeve corresponding to the position above the liquid inlet hole and the lower joint, and the second sealing ring is arranged between the first sliding sleeve corresponding to the position below the liquid inlet hole and the lower joint; the third sealing ring is arranged between the second sliding sleeve corresponding to the position above the jet hole at the uppermost position and the injector body, and the third sealing ring is arranged between the second sliding sleeve corresponding to the position below the jet hole at the lowermost position and the injector body; and/or the sprayer further comprises a nozzle pressing cap, an anti-reverse-splashing lining block and a fourth sealing ring, wherein an arc-shaped mounting groove is formed in the outer side of the sprayer body corresponding to each spray hole, the arc-shaped mounting groove is internally and fixedly provided with the anti-reverse-splashing lining block matched with the arc-shaped mounting groove, the anti-reverse-splashing lining block corresponding to the spray hole is provided with a mounting hole which is communicated with the inside and the outside, a mounting ring groove is formed in the inner side of the outer end of the mounting hole, the nozzle pressing cap with the outer end located in the mounting hole is fixedly mounted in the spray hole, an outer ring platform located in the mounting ring groove is arranged at the outer end of the nozzle pressing cap, an inner ring platform is arranged on the inner side of the outer end of the nozzle pressing cap, a nozzle.

9. The staged fracturing string as recited in claim 4, wherein the first sliding sleeve comprises a plugging sleeve, elastic claws and second sealing rings, the upper end of the plugging sleeve is located above the liquid inlet hole, the lower end of the plugging sleeve is located below the liquid inlet hole, the elastic claws are fixedly installed at the lower end of the plugging sleeve along the circumferential direction at intervals, a limiting boss is arranged on the outer side of the lower end of each elastic claw, the second sealing ring is arranged between the first sliding sleeve corresponding to the position above the liquid inlet hole and the lower joint, and the second sealing ring is arranged between the first sliding sleeve corresponding to the position below the liquid inlet hole and the lower joint; the third sealing ring is arranged between the second sliding sleeve corresponding to the position above the jet hole at the uppermost position and the injector body, and the third sealing ring is arranged between the second sliding sleeve corresponding to the position below the jet hole at the lowermost position and the injector body; and/or the sprayer further comprises a nozzle pressing cap, an anti-reverse-splashing lining block and a fourth sealing ring, wherein an arc-shaped mounting groove is formed in the outer side of the sprayer body corresponding to each spray hole, the arc-shaped mounting groove is internally and fixedly provided with the anti-reverse-splashing lining block matched with the arc-shaped mounting groove, the anti-reverse-splashing lining block corresponding to the spray hole is provided with a mounting hole which is communicated with the inside and the outside, a mounting ring groove is formed in the inner side of the outer end of the mounting hole, the nozzle pressing cap with the outer end located in the mounting hole is fixedly mounted in the spray hole, an outer ring platform located in the mounting ring groove is arranged at the outer end of the nozzle pressing cap, an inner ring platform is arranged on the inner side of the outer end of the nozzle pressing cap, a nozzle.

10. The staged fracturing string as recited in claim 6, wherein the first sliding sleeve comprises a plugging sleeve, elastic claws and second sealing rings, the upper end of the plugging sleeve is located above the liquid inlet hole, the lower end of the plugging sleeve is located below the liquid inlet hole, the elastic claws are fixedly installed at the lower end of the plugging sleeve along the circumferential direction at intervals, a limiting boss is arranged on the outer side of the lower end of each elastic claw, the second sealing ring is arranged between the first sliding sleeve corresponding to the position above the liquid inlet hole and the lower joint, and the second sealing ring is arranged between the first sliding sleeve corresponding to the position below the liquid inlet hole and the lower joint; the third sealing ring is arranged between the second sliding sleeve corresponding to the position above the jet hole at the uppermost position and the injector body, and the third sealing ring is arranged between the second sliding sleeve corresponding to the position below the jet hole at the lowermost position and the injector body; and/or the sprayer further comprises a nozzle pressing cap, an anti-reverse-splashing lining block and a fourth sealing ring, wherein an arc-shaped mounting groove is formed in the outer side of the sprayer body corresponding to each spray hole, the arc-shaped mounting groove is internally and fixedly provided with the anti-reverse-splashing lining block matched with the arc-shaped mounting groove, the anti-reverse-splashing lining block corresponding to the spray hole is provided with a mounting hole which is communicated with the inside and the outside, a mounting ring groove is formed in the inner side of the outer end of the mounting hole, the nozzle pressing cap with the outer end located in the mounting hole is fixedly mounted in the spray hole, an outer ring platform located in the mounting ring groove is arranged at the outer end of the nozzle pressing cap, an inner ring platform is arranged on the inner side of the outer end of the nozzle pressing cap, a nozzle.

Technical Field

The invention relates to the technical field of underground fracturing devices, in particular to a step-by-step directional hydraulic jet separate-layer fracturing string.

Background

Hydraulic jet fracturing is an important oil and gas well development mode at present, integrates sand-collecting and jetting perforation, fracturing and isolation, and is suitable for oil and gas wells of various well types. In the perforation fracturing process, a packer is needed to be used for packing a plurality of oil-gas layers, mutual interference and influence between construction layers are eliminated, the trend of fracturing sand fluid is ensured to enter a construction target layer, and the fracturing construction effect is improved. At present, when separate-layer fracturing operation is carried out, different oil and gas layers need to be set in the step-by-step fracturing process from bottom to top, and step-by-step setting cannot be realized through the conventional packer; in addition, the hydraulic ejector provided with nozzles in a circumferentially and uniformly distributed manner has quick attenuation of the jetting energy of fracturing sand liquid, can only enter and extend along the conventional fracturing crack direction, cannot generate a new crack net, and a sand blaster needs to be replaced when 2-3 layers of the sand blaster are constructed generally.

Disclosure of Invention

The invention provides a step-by-step directional hydraulic jet separate-layer fracturing string, overcomes the defects of the prior art, can effectively solve the problem that the conventional packer cannot realize step-by-step setting, and further solves the problem that the conventional hydraulic jet cannot generate a new seam net.

The technical scheme of the invention is realized by the following measures: a step-by-step directional hydraulic jet layered fracturing string comprises a hydraulic anchor, a well completion sliding sleeve, a step-by-step fracturing assembly, a check valve, a sieve tube and a guide head which are serially connected with a continuous oil tube from top to bottom, wherein the step-by-step fracturing assembly comprises at least two fracturing components serially connected from top to bottom, each fracturing component comprises a packer, a cross oil separating tube, a centralizer and an ejector which are serially connected from top to bottom, each packer comprises an upper joint, a central tube, a lower joint, a rubber cylinder device and a first sliding sleeve, an upper joint is fixedly installed on the outer side of the upper portion of the central tube, a lower joint is fixedly installed on the outer side of the lower portion of the central tube, a rubber cylinder assembly with expandable liquid inlet is installed on the outer side of the middle portion of the central tube, an expansion gap is formed between the rubber cylinder assembly and the central tube, a liquid inlet through which an inner tube and an outer tube pass is formed in, the upper end of the first sliding sleeve is positioned above the liquid inlet hole, the lower end of the first sliding sleeve is positioned below the liquid inlet hole, and an expanding ring groove is formed in the inner side of the middle of the lower connector corresponding to the position below the first sliding sleeve; the sprayer includes sprayer body, nozzle and second sliding sleeve, and this internal overflow channel that link up from top to bottom that is equipped with of sprayer, the sprayer body outside along circumferencial direction interval distribution about have at least two can with overflow the jet orifice of passageway intercommunication, equal fixed mounting has the nozzle in the jet orifice, through second shear pin fixed mounting have the second sliding sleeve in the overflow channel, the second sliding sleeve upper end is located the jet orifice top of the position of the top, the second sliding sleeve lower extreme is located the jet orifice below of the position of the bottom.

The following is further optimization or/and improvement of the technical scheme of the invention:

the rubber sleeve assembly comprises an outer rubber sleeve, an inner rubber sleeve and support bars, the outer side of the middle part of the central tube is sleeved with the inner rubber sleeve, the outer side of the inner rubber sleeve is uniformly provided with at least two support bars along the circumference, the upper ends of the support bars are fixedly arranged with the corresponding positions of the outer side of the upper end of the inner rubber sleeve, the lower ends of the support bars are fixedly arranged with the corresponding positions of the outer side of the lower end of the inner rubber sleeve, the outer rubber sleeve is sleeved on the outer side of the middle part of the inner rubber sleeve, and the inner side of the middle part of the outer rubber sleeve is fixedly arranged with the outer side of the middle part of; the upper end of the inner rubber cylinder is fixedly arranged together with the upper joint through an upper fixing assembly, the lower end of the inner rubber cylinder is fixedly provided with a lower floating assembly capable of axially moving along the outer side of the upper part of the lower joint, and the outer side of the middle part of the lower joint corresponding to the lower position of the lower floating assembly is fixedly provided with a limiting assembly.

The upper fixing device can comprise an upper rubber cylinder seat, the outer side of the lower end of the upper joint is fixedly provided with the upper rubber cylinder seat, and the inner side of the lower end of the upper rubber cylinder seat is fixedly arranged with the inner rubber cylinder; the lower floating assembly comprises a lower rubber cylinder seat, a floating sleeve and a first sealing ring, the outer side of the middle part of the lower joint is provided with the floating sleeve, the upper part of the floating sleeve is positioned above the lower rubber cylinder seat, the floating sleeve comprises a connecting part and a floating part, the outer side of the upper end of the connecting part is fixedly installed with the inner side of the upper end of the floating part, the lower rubber cylinder seat sleeved on the outer side of the lower part of the central pipe is fixedly installed at the lower end of the inner rubber cylinder, the inner side of the lower end of, a sealing ring table is arranged on the outer side of the upper part of the lower joint corresponding to the position below the liquid inlet hole, a sliding vertical groove is arranged on the inner side of the upper end of the floating part corresponding to the position above the sealing ring table, a sliding block is fixedly installed on the outer side of the upper end of the lower joint, the outer end of the sliding block is positioned in the sliding vertical groove, at least one first sealing ring is arranged between the lower rubber cylinder seat and the connecting part at an upper-lower interval, at least one first sealing ring is arranged between the lower joint and the central pipe at an upper-lower interval, and at least one first sealing ring is arranged between the; the limiting assembly comprises a limiting stop ring and a limiting screw, the limiting stop ring is arranged on the outer side of the middle part of the lower connector corresponding to the lower position of the floating assembly, and the limiting stop ring is fixedly installed together with the lower connector through the limiting screw.

Preferably, the right side of the upper part of the injector body can be provided with an injection hole, and the front side of the lower part of the injector is provided with an injection hole; the axis of the injection hole at the right side is a first axis, the projection of the first axis on the horizontal plane is a first projection, the axis of the injection hole at the front side is a second axis, the projection of the second axis on the horizontal plane is a second projection, the included angle between the first projection and the second projection is a first included angle, and the first included angle is 75-150 degrees.

The ejector comprises an ejector body and is characterized by further comprising a first centering block and a second centering block, wherein the first centering block and the second centering block are arranged on the left rear side of the ejector body at intervals and correspond to positions between the injection holes, an angular bisector of the first included angle is a symmetry line, the projection of the first centering block on the horizontal plane is a third projection, the projection of the second centering block on the horizontal plane is a fourth projection, and the third projection and the fourth projection are symmetrical along the symmetry line.

The first angle may be 90 °.

Preferably, the right side of the upper part of the injector body can be provided with an injection hole, the front side of the middle part of the injector is provided with an injection hole, and the left rear side of the lower part of the injector body is provided with an injection hole; the axis of the injection hole positioned at the right side is a third axis, the projection of the third axis on the horizontal plane is a sixth projection, the axis of the injection hole positioned at the front side is a fourth axis, the projection of the fourth axis on the horizontal plane is a seventh projection, the axis of the injection hole positioned at the left rear side is a fifth axis, and the projection of the fifth axis on the horizontal plane is an eighth projection; an included angle between the sixth projection and the seventh projection is a second included angle, the second included angle is between 75 degrees and 150 degrees, an included angle between the seventh projection and the eighth projection is a third included angle, the third included angle is between 75 degrees and 150 degrees, an included angle between the eighth projection and the sixth projection is a fourth included angle, and the fourth included angle is between 75 degrees and 150 degrees.

The ejector comprises an ejector body, a front ejector body and a rear ejector body, and is characterized by further comprising a third centering block, a fourth centering block and a fifth centering block, wherein the third centering block is arranged on the left side of the ejector body corresponding to the position of the right-side injection hole, the fourth centering block is arranged on the rear side of the ejector body corresponding to the position of the front-side injection hole, and the fifth centering block is arranged on the right front side of the ejector body corresponding to the position of the left-rear injection hole.

The second included angle may be 90 °, the third included angle 135 °, and the fourth included angle 135 °.

The first sliding sleeve can comprise a blocking sleeve, elastic claws and second sealing rings, the upper end of the blocking sleeve is positioned above the liquid inlet hole, the lower end of the blocking sleeve is positioned below the liquid inlet hole, the elastic claws are fixedly installed at the lower end of the blocking sleeve at intervals along the circumferential direction, a limiting boss is arranged on the outer side of the lower end of each elastic claw, the second sealing rings are arranged between the first sliding sleeve corresponding to the position above the liquid inlet hole and the lower connector, and the second sealing rings are arranged between the first sliding sleeve corresponding to the position below the liquid inlet hole and the lower connector.

The above-mentioned still can include the third sealing washer, is equipped with the third sealing washer between the second sliding sleeve that corresponds the jet orifice upper position of the top position and the sprayer body, is equipped with the third sealing washer between the second sliding sleeve that corresponds the jet orifice lower position of the bottommost position and the sprayer body.

The sprayer body outer side corresponding to each spray hole position is provided with an arc mounting groove, the arc mounting groove is internally and fixedly provided with an anti-splashing lining block matched with the arc mounting groove, the anti-splashing lining block corresponding to the spray hole position is provided with a mounting hole communicated with the inside and the outside, the inner side of the outer end of the mounting hole is provided with a mounting ring groove, the spray hole is internally and fixedly provided with a spray nozzle pressing cap, the outer end of the spray nozzle pressing cap is provided with an outer ring platform positioned in the mounting ring groove, the inner side of the outer end of the spray nozzle pressing cap is provided with an inner ring platform, a spray nozzle is fixedly arranged in the spray nozzle pressing cap corresponding to the inner end position of the inner ring platform, and a fourth sealing ring is arranged between the spray nozzle pressing cap corresponding to the inner end.

The ball injection device is reasonable and compact in structure and convenient to use, and the ball injection device is convenient for ball injection to start seat sealing step by arranging the first sliding sleeve and the first shear pin; the lower part of the descending first sliding sleeve is radially expanded outwards by arranging the diameter expansion ring groove, so that the pressure build-up ball continuously falls; the novel crack can be opened in different directions of the original crack net by arranging the asymmetrically distributed injection holes on the injector body; through the arrangement of the second sliding sleeve and the second shear pins, the injection holes in the injector body can be opened step by conveniently throwing the balls; by arranging the centering block, the centering thrust is ensured to be provided in the direction opposite to the spraying direction of the nozzle, and the centering device has the characteristics of stability, easiness in forming a new seam and convenience in control.

Drawings

Fig. 1 is a schematic front view structure diagram of the first embodiment.

FIG. 2 is a front, semi-sectional, schematic view of the packer of FIG. 1.

FIG. 3 is a schematic front view semi-sectional structure of an ejector according to a fourth embodiment.

FIG. 4 is a schematic sectional view of the ejector according to the second embodiment.

FIG. 5 is a schematic sectional view of the ejector according to the third embodiment in a top view.

The codes in the figures are respectively: 1 is an ejector body, 2 is a nozzle, 3 is a nozzle pressing cap, 4 is an anti-splashing lining block, 5 is a mounting ring groove, 6 is an outer ring table, 7 is an inner ring table, 8 is an overflowing channel, 9 is an injection hole, 10 is a second sliding sleeve, 11 is a second shear pin, 12 is a third sealing ring, 13 is a fourth sealing ring, 14 is a first centering block, 15 is a second centering block, 16 is a third centering block, 17 is a fourth centering block, 18 is a fifth centering block, 19 is an upper joint, 20 is a central pipe, 21 is a lower joint, 22 is a liquid inlet hole, 23 is an expanding ring groove, 24 is a sealing sleeve, 25 is an elastic claw, 26 is an outer rubber cylinder, 27 is an inner rubber cylinder, 28 is a supporting bar, 29 is an upper rubber cylinder seat, 30 is a lower rubber cylinder seat, 31 is a connecting part, 32 is a floating part, 33 is a sliding block, 34 is a limiting retaining ring, 35 is a limiting screw, 36 is a first shear pin, 37 is a sealing ring table, and 38 is a first sealing ring, 39 is a second sealing ring, 40 is a continuous oil pipe, 41 is a hydraulic anchor, 42 is a well completion sliding sleeve, 43 is a check valve, 44 is a screen pipe, 45 is a guide head, 46 is a sleeve, 47 is a straddle nipple, and 48 is a centralizer.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described with reference to the following examples and figures: