CN114352246B

CN114352246B - Multi-structure adjustable bridge type concentric water distributor

Info

Publication number: CN114352246B
Application number: CN202210030778.1A
Authority: CN
Inventors: 江涛
Original assignee: Jingjiang Qianglin Petroleum Drilling Equipment Manufacturing Co ltd
Current assignee: Jingjiang Qianglin Petroleum Drilling Equipment Manufacturing Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2023-03-21
Anticipated expiration: 2042-01-12
Also published as: CN114352246A

Abstract

The invention relates to the technical field of oilfield water injection, in particular to a multi-structure adjustable bridge type concentric water distributor which comprises a first sleeve and a second sleeve. The multi-structure adjustable bridge type concentric water distributor adopts the first sleeve and the second sleeve which are connected in a split mode to assemble the adjusting sealing ring, then the adjusting sealing ring is controlled by the aid of the driving pipe inside, and through the split type structure design, loading and unloading difficulty and later maintenance and replacement cost can be greatly reduced; the driving pipe is in transmission connection with the adjusting sealing ring through an internal linkage mechanism, and meanwhile, the positioning tooth block is matched with the matching tooth block, so that assembly and linkage control are facilitated, and meanwhile, the assembly stability and firmness in the water injection process are improved, and the driving control of the driving pipe is more stable and efficient; meanwhile, the installation stability of the concentric water distributor in the well and the guidance of the interlayer water channel are greatly improved; and adopt to indulge and put the direction seal groove and indulge and put the direction sealing strip and cooperate, promote the side direction leakproofness when can guaranteeing regulation stability.

Description

Multi-structure adjustable bridge type concentric water distributor

Technical Field

The invention relates to the technical field of oilfield water injection, in particular to a multi-structure adjustable bridge type concentric water distributor.

Background

In the middle and later stages of oil field development, in order to supplement stratum energy, water wells need to be injected with water in a separated layer mode. At present, the oil field generally uses the processes of hollow integration, concentric separate injection and one-throw-three-division-equal-separation water injection.

In the process of oilfield water injection development, if the oil layer is thick, the injection layers are multiple, and the heterogeneity is severe, the injected water is often fingered along a high-permeability layer, the water injection swept volume is reduced, the water drive effect is reduced, especially in a heavy oil oilfield with prominent non-homogeneity, the fingering phenomenon of the injected water is more severe, and the oilfield water injection development effect is finally influenced. In order to avoid the early flooding of the oil well caused by the channeling of the injected water along the high permeable stratum, the layered injection allocation is carried out according to the water absorption condition of each stratum of the water injection well so as to ensure that the injected water is uniformly propelled in each stratum.

Water injection is the foundation of oil field development, and a series of layered water injection processes and matched test processes which are suitable for different oil reservoir geological conditions and different well types are formed at present. With the development of old oil fields and the development of various complex oil fields, the adaptability and the matching degree of the separated layer water injection process need to be further improved.

The water distributor is an important device for realizing separated layer water injection. Water distributors come in a variety of forms, such as: eccentric water distributors, hollow water distributors, integrated concentric water distributors, bridge water distributors, and the like. The conventional water distributor is simple in structure, the operation of the control mechanism is inconvenient, the disassembly and the assembly need to be carried out in a segmented mode, the construction period is very high, streaming is easily generated between different stratums in the water injection process, the impact force on a water injection port connecting port is large, the installation stability of the water distributor is limited, and the flow of lateral water injection is not large.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background technology, the improved multi-structure adjustable bridge type concentric water distributor is provided, and the problems that the conventional water distributor is simple in structure, the operation of a control mechanism is inconvenient, the disassembly and the assembly need to be carried out in a segmented mode, the construction period is very high, meanwhile, series flow is easy to generate among different stratums in the water injection process, the impact force on a water injection port connecting port is large, the installation stability of the water distributor is limited, and the flow of lateral water injection is not large are solved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a concentric water injection mandrel of adjustable bridge type of multi-structure, includes first sleeve pipe and second sleeve pipe, first sleeve pipe inside wall lower extreme seted up in the first ring-shaped adjustment tank, second sleeve pipe inside wall upper end set up with adjustment tank matched with second ring-shaped in the first ring-shaped adjustment tank, first sleeve pipe lateral wall correspond in the first ring-shaped adjustment tank position and second sleeve pipe lateral wall correspond in the second ring-shaped adjustment tank position and have all seted up a plurality of arc outside outlet, first ring-shaped in adjustment tank and the second ring-shaped in the inside slip of adjustment tank be equipped with the regulation sealing ring, regulation sealing ring outside arc on seted up a plurality of vertical direction seal grooves, regulation sealing ring inside seted up a plurality of arc inside water gaps of crossing with arc outside outlet matched with, first sleeve pipe and second sleeve pipe inside peg graft and be used for control regulation sealing ring driven drive tube, the drive tube be connected with regulation sealing ring transmission through inside link gear.

The first annular inner adjusting groove inner side opening upper end is provided with a downward convex first inner limiting ring of an integrated structure, the second annular inner adjusting groove inner side opening lower end is provided with an upward convex second inner limiting ring of an integrated structure, and the first annular inner adjusting groove and the second annular inner adjusting groove inner side face are provided with longitudinal guide sealing strips matched with longitudinal guide sealing grooves.

The lower end of the first internal limiting ring is fixedly provided with a first movable assembly frame through an upper support, and the upper end of the second internal limiting ring is fixedly provided with a second movable assembly frame through a lower support.

The internal linkage mechanism comprises an external thread linkage ring movably assembled between the first movable assembling frame and the second movable assembling frame, an internal thread linkage ring fixed on the outer side wall of the driving pipe and fixed on the inner arc-shaped surface of the adjusting sealing ring.

And lateral adjusting through holes with built-in telescopic lateral positioning blocking devices are formed in the first sleeve and the second sleeve.

The inner side wall of the lateral adjusting through hole is provided with a lateral adjusting transmission groove with a built-in lateral linkage gear at the position of the inner opening, and the telescopic lateral positioning blocking device comprises an inner linkage screw rod meshed with the lateral linkage gear, an internal thread telescopic pipe in threaded sleeve joint with the inner linkage screw rod, and an arc-shaped blocking cover coaxially fixed at the top end of the outer side of the internal thread telescopic pipe.

The inner assembly set is provided with lateral linkage tooth blocks matched with the lateral linkage gears on the inner wall of the outer lateral surface matching groove.

The upper and lower end of the adjusting sealing ring is located at the inner side of the first inner limiting ring and the inner side of the second inner limiting ring, the inner guide rod of the extrusion spring is sleeved outside the inner side of the first inner limiting ring, and the inner guide blind holes matched with the inner guide rod are formed in the inner top surface of the first annular inner adjusting groove and the inner bottom surface of the second annular inner adjusting groove.

The internal side face of the external thread linkage ring is provided with an inward convex integrated structure positioning tooth block, the external side face of the internal assembly sleeve is provided with a matching tooth block matched with the positioning tooth block, and the lower end of the positioning tooth block and the upper end of the matching tooth block are provided with arc-shaped limiting plates.

The positioning tooth block is internally provided with a telescopic limiting groove, the matching tooth block is internally provided with a telescopic through hole with a built-in telescopic limiting block, the inner side wall of the driving pipe is provided with an internal extrusion groove, and the top end of the inner side of the telescopic limiting block is positioned in the internal extrusion groove and coaxially fixed with an internal extrusion plate with a built-in reset elastic sheet.

The invention has the beneficial effects that:

(1) The multi-structure adjustable bridge type concentric water distributor adopts the first sleeve and the second sleeve which are connected in a split mode to assemble the adjusting sealing ring, then the adjusting sealing ring is controlled by the aid of the driving pipe inside, and through the split type structure design, loading and unloading difficulty and later maintenance and replacement cost can be greatly reduced;

(2) The driving pipe is in transmission connection with the adjusting sealing ring through an internal linkage mechanism, and meanwhile, the positioning tooth block is matched with the matching tooth block, so that assembly and linkage control are facilitated, and meanwhile, the assembly stability and firmness in the water injection process are improved, and the driving control of the driving pipe is more stable and efficient;

(3) The telescopic lateral positioning and blocking devices are arranged in the first sleeve and the second sleeve, and the driving pipe is internally matched with the telescopic lateral positioning and blocking devices, so that the driving pipe not only has a meshing transmission function, but also can control the telescopic lateral positioning and blocking devices to stretch when being assembled and disassembled, the functionality is greatly enhanced, and the installation stability of the concentric water distributor in a well and the guidance of an interlayer water channel are also greatly improved;

(4) The adjusting sealing ring controls the relative position of the water passing port inside the arc and the water outlet outside the arc through lifting adjustment, the lateral water injection flow and the working efficiency can be greatly improved through horizontal setting, and the longitudinal guide sealing groove is matched with the longitudinal guide sealing strip, so that the lateral sealing performance can be improved while the adjusting stability is ensured.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an internal cross-sectional view of the present invention.

Fig. 3 is a longitudinal sectional view of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1, fig. 2 and fig. 3 show a concentric water injection mandrel of adjustable bridge type of multi-structure, including first sleeve pipe 1 and second sleeve pipe 2, regulation groove 3 in the first annular has been seted up to first sleeve pipe 1 inside wall lower extreme, regulation groove 4 in the second sleeve pipe 2 inside wall upper end seted up with regulation groove 3 matched with in the first annular, first sleeve pipe 1 and second sleeve pipe 2 are through bolt fastening will be adjusted groove 3 and the second annular in regulation groove 4 assembles into a lift adjustment groove that is linked together, 2 arc outside outlet 6 have all been seted up to regulation groove 3 position in the first annular and second sleeve pipe 2 lateral wall corresponding second annular in regulation groove 4 position in first sleeve pipe 1 lateral wall, regulation groove 3 and second annular in regulation groove 4 inside sliding fit have the regulation sealing ring 7, a plurality of vertical direction seal grooves 8 have been seted up on the regulation sealing ring 7 outside arcwall corresponding arc inside, 2 arc inside water passing mouth 9 with arc outside outlet 6 matched with are seted up to regulation sealing ring 7, first sleeve pipe 1 and second sleeve pipe 2 inside grafting have the drive control sealing ring 7, the drive pipe 10 that is used for adjusting the drive sealing ring 7 and the drive adjustment mechanism is connected through drive tube 10.

The number and the dislocation gaps of the arc-shaped outer water outlet 6 and the arc-shaped inner water passing port 9 can be increased or decreased according to actual needs, and the attached drawing is only one schematic.

Further, in order to improve the stability and the tightness of the adjusting seal ring 7, the upper end of the inner side opening of the first annular inner adjusting groove 3 is provided with a downward convex first inner limiting ring 11 in an integral structure, the lower end of the inner side opening of the second annular inner adjusting groove 4 is provided with an upward convex second inner limiting ring 12 in an integral structure, and the inner side surfaces of the first annular inner adjusting groove 3 and the second annular inner adjusting groove 4 are provided with longitudinal guide seal strips 13 matched with the longitudinal guide seal grooves 8.

Further, for the fitting assembly and the position limitation, the lower end of the first inner limiting ring 11 is fixedly assembled with a first movable assembly frame 15 through an upper bracket 14, and the upper end of the second inner limiting ring 12 is fixedly assembled with a second movable assembly frame 17 through a lower bracket 16.

Further, in order to cooperate with the internal linkage control, the internal linkage mechanism includes an external thread linkage ring 18 movably fitted between the first movable fitting frame 15 and the second movable fitting frame 17, an internal fitting ring 19 fixed on the outer side wall of the driving pipe 10, and an internal thread linkage ring 20 fixed on the inner arc surface of the regulating seal ring 7.

Annular limiting grooves are formed in the upper end and the lower end of the external thread linkage ring 18, and the first movable assembling frame 15 and the second movable assembling frame 17 are movably assembled with the external thread linkage ring 18 by being inserted into the annular limiting grooves.

After the driving pipe 10 is inserted, the internal assembly sleeve 19 is meshed with the external thread linkage ring 18, the internal assembly sleeve 19 starts to rotate to drive the external thread linkage ring 18 to rotate, and the external thread linkage ring 18 drives the internal thread linkage ring 20 to lift, so that the purpose of controlling and adjusting the lifting of the sealing ring 7 is achieved.

Further, in order to cooperate with the telescopic control, a lateral adjusting through hole 21 with a built-in telescopic lateral positioning blocking device is formed inside the first sleeve 1 and the second sleeve 2.

Further, in order to improve the assembly stability and lateral water conductivity and avoid series flow, a lateral adjustment transmission groove 23 with a built-in lateral linkage gear 22 is formed in the position, located at the inner opening, of the inner side wall of the lateral adjustment through hole 21, and the telescopic lateral positioning blocking device comprises an inner linkage screw 24 meshed with the lateral linkage gear 22, an internal thread telescopic tube 25 in threaded sleeve connection with the inner linkage screw 24, and an arc-shaped blocking cover 26 coaxially fixed at the top end of the outer side of the internal thread telescopic tube 25.

Further, in order to cooperate with the lateral control, the inner assembly sleeve 19 has a lateral interlocking tooth block 27 on the inner wall of the outer side surface mating groove for cooperating with the lateral interlocking gear 22.

In order to facilitate the assembly and disassembly without influencing the control of the telescopic lateral positioning blocking device, people can adjust the telescopic lateral positioning blocking device in a dislocation mode during the installation, dislocate the lateral linkage tooth block 27 and the lateral linkage gear 22 during the installation process, rotate and reset when reaching the specified stratum depth, align the lateral linkage tooth block 27 to the lateral linkage gear 22, and control the lateral linkage gear 22 to rotate by utilizing the lifting, so as to control the arc-shaped blocking cover 26 to stretch, and the arc-shaped blocking cover 26 is composed of an upper component and a lower component, so that the lateral limiting and closing effects are achieved.

People fix first sleeve 1 and second sleeve 2 bolt earlier, then insert driving tube 10 from last down, drop the appointed water injection layer with the inside link gear on the driving tube 10 earlier, then rotate driving tube 10, conveniently control side direction linkage gear 22 through rotating 90.

Further, in order to promote regulation stability and elasticity reset ability, adjust the inside guide bar 29 that the sealing ring 7 upper and lower end lies in that first inside spacing ring 11 and the inside spacing ring 12 of second are inboard all to have the outside and cup joint extrusion spring 28, all seted up on top surface and the second annular in the adjustment tank 4 bottom surface in the adjustment tank 3 in the first annular and the inside direction blind hole 30 with inside guide bar 29 matched with.

Furthermore, in order to improve the limiting capability after assembly, an integral structure positioning tooth block 31 protruding inwards is arranged on the inner side surface of the external thread linkage ring 18, a matching tooth block 32 matched with the positioning tooth block 31 is arranged on the outer side surface of the internal assembly sleeve 19, and arc-shaped limiting plates 33 are arranged at the lower end of the positioning tooth block 31 and the upper end of the matching tooth block 32.

The positioning toothed block 31 and the matching toothed block 32 are adopted for meshing assembly, so that the driving pipe 10 can be conveniently assembled and disassembled by adopting dislocation, and meanwhile, the distance between the driving pipe 10 and the first sleeve 1 and the second sleeve 2 can be increased, so that the flux inside the driving pipe can be increased.

Then the rotation is reset, so that the positioning tooth block 31 is engaged with the matching tooth block 32, and at the moment, the driving pipe 10 is rotated to control the lifting of the adjusting sealing ring 7.

Further, outwards extrude when inside water pressure is high in order to cooperate, promote assembly firmness and stability, flexible spacing groove 34 has been seted up to location cogged piece 31 is inside, and the flexible through-hole of built-in flexible spacing block 35 has been seted up to cooperation cogged piece 32 is inside, has seted up inside extrusion groove 37 on the driving tube 10 inside wall, and the inboard top of flexible spacing block 35 is located inside coaxial inside the internal extrusion board 39 that is fixed with built-in shell fragment 38 that resets of inside extrusion groove 37.

Under normal conditions, flexible stopper 35 drives through the shell fragment 38 that resets and contracts flexible through-hole inside completely, after the inside water pressure of driving tube 10 has been high, extrudees the inside stripper plate for flexible stopper 35 stretches out flexible through-hole, inserts flexible spacing groove 34 inside, just can not break away from between this time location tooth piece 31 and the cooperation tooth piece 32.

The multi-structure adjustable bridge type concentric water distributor adopts the first sleeve 1 and the second sleeve 2 which are connected in a split mode to assemble the adjusting sealing ring 7, then the adjusting sealing ring 7 is controlled by the driving pipe 10 inside, and through the split type structure design, the assembling and disassembling difficulty and the later maintenance and replacement cost can be greatly reduced; the driving pipe 10 is in transmission connection with the adjusting sealing ring 7 through an internal linkage mechanism, and meanwhile, the positioning tooth block 31 is matched with the matching tooth block 32, so that assembly and linkage control are facilitated, and meanwhile, the assembly stability and firmness in the water injection process are improved, and the driving control is more stable and efficient; the telescopic lateral positioning and blocking devices are arranged in the first sleeve 1 and the second sleeve 2, the internal assembly sleeve 19 on the driving pipe 10 has a meshing transmission function, and meanwhile, the telescopic lateral positioning and blocking devices can be controlled to stretch during assembly and disassembly, so that the functionality is greatly enhanced, and the installation stability of the concentric water distributor in a well and the guidance of an interlayer water channel are also greatly improved; adjusting seal ring 7 controls the relative position of mouth of a river 9 and arc outside outlet 6 through lift adjustment in the arc, sets up through the level and can promote side direction water injection flow and work efficiency greatly to adopt to indulge and put direction seal groove 8 and indulge and put the direction sealing strip 13 and cooperate, promote side direction leakproofness when can guarantee regulation stability.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A concentric injection mandrel of adjustable bridge type of multi-structure, including first sleeve (1) and second sleeve (2), characterized by: the lower end of the inner side wall of the first sleeve (1) is provided with a first annular inner adjusting groove (3), the upper end of the inner side wall of the second sleeve (2) is provided with a second annular inner adjusting groove (4) matched with the first annular inner adjusting groove (3), the positions of the first annular inner adjusting groove (3) and the second annular inner adjusting groove (4) corresponding to the side wall of the first sleeve (1) are respectively provided with a plurality of arc-shaped outer water outlets (6), the inner parts of the first annular inner adjusting groove (3) and the second annular inner adjusting groove (4) are assembled with an adjusting sealing ring (7) in a sliding manner, the outer arc-shaped surface of the adjusting sealing ring (7) is provided with a plurality of longitudinally-arranged guide sealing grooves (8), the inner parts of the adjusting sealing ring (7) are provided with a plurality of arc-shaped inner water passing openings (9) matched with the arc-shaped outer water outlets (6), the inner parts of the first sleeve (1) and the second sleeve (2) are spliced with a driving pipe (10) for controlling and adjusting the driving pipe (7) to be driven, the inner side of the first annular inner side wall of the adjusting sealing ring (10) is provided with an integral second annular inner adjusting mechanism, the inner side opening of the second annular inner adjusting groove (4) is provided with an integral upper end of a second annular inner adjusting limiting ring structure which is provided with an upper end of an inner limiting ring (12) which is provided with an integral limiting ring (11), the inner side surfaces of the first annular inner adjusting groove (3) and the second annular inner adjusting groove (4) are provided with a longitudinal guide sealing strip (13) matched with a longitudinal guide sealing groove (8), the lower end of the first inner limiting ring (11) is fixedly assembled with a first movable assembling frame (15) through an upper bracket (14), the upper end of the second inner limiting ring (12) is fixedly assembled with a second movable assembling frame (17) through a lower bracket (16), the inner linkage mechanism comprises an external thread linkage ring (18) movably assembled between the first movable assembling frame (15) and the second movable assembling frame (17), an inner device matching ring (19) fixed on the outer side wall of a driving pipe (10) and an internal thread linkage ring (20) fixed on the inner side arc-shaped surface of an adjusting sealing ring (7), a lateral adjusting through hole (21) internally provided with a built-in telescopic lateral positioning blocking device is arranged inside the first sleeve (1) and the second sleeve (2), the lateral adjusting through hole (21) is positioned at the position of an inner opening and is provided with a lateral adjusting gear (22), the lateral adjusting transmission groove (23) is meshed with a lateral adjusting screw rod (24) of a telescopic lateral adjusting gear (24) and a lateral blocking screw rod (24) which are coaxially sleeved on the top end of the inner lateral adjusting screw rod (24) and a telescopic lateral blocking cover of the telescopic lateral adjusting screw rod (24), external screw thread link ring (18) medial surface on have inside bellied body structure location tooth piece (31), inside dress form (19) lateral surface on have with location tooth piece (31) matched with cooperation tooth piece (32), location tooth piece (31) lower extreme and cooperation tooth piece upper end all have arc limiting plate (33).

2. A multi-structure adjustable bridge concentric water distributor according to claim 1 wherein: and a lateral linkage tooth block (27) matched with the lateral linkage gear (22) is arranged on the inner wall of the outer lateral surface matching groove of the internal assembly sleeve (19).

3. A multi-structure adjustable bridge concentric water distributor according to claim 1 wherein: the upper and lower ends of the adjusting sealing ring (7) are located on the inner sides of the first inner limiting ring (11) and the second inner limiting ring (12) and are provided with inner guide rods (29) of which the outer sides are sleeved with the extrusion springs (28), and inner guide blind holes (30) matched with the inner guide rods (29) are formed in the inner top surface of the first annular inner adjusting groove (3) and the inner bottom surface of the second annular inner adjusting groove (4).

4. A multi-structure adjustable bridge concentric water distributor according to claim 1 wherein: the positioning tooth block (31) is internally provided with a telescopic limiting groove (34), the matching tooth block (32) is internally provided with a telescopic through hole with a built-in telescopic limiting block (35), the inner side wall of the driving tube (10) is provided with an inner extrusion groove (37), and the top end of the inner side of the telescopic limiting block (35) is positioned in the inner extrusion groove (37) and coaxially fixed with an inner extrusion plate (39) with a built-in reset elastic sheet (38).