CN210164464U

CN210164464U - Single-layer adjustable water nozzle

Info

Publication number: CN210164464U
Application number: CN201920729672.4U
Authority: CN
Inventors: 石建设; 石易蕾; 彭太祥; 余立群
Original assignee: Jiangsu Oil Field Mining Development Co Ltd; China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Current assignee: Jiangsu Oil Field Mining Development Co Ltd; China Petroleum and Chemical Corp; Sinopec Jiangsu Oilfield Co
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-03-20
Anticipated expiration: 2030-01-03

Abstract

The utility model relates to a single-layer adjustable water nozzle in the field of oilfield separate-layer water injection tools, which comprises a fishing head, wherein the lower part of the fishing head is fixedly connected with a main driving shaft, the lower part of the main driving shaft is abutted and connected with a tip cone, the periphery of the middle part of the main driving shaft is slidably connected with a screw shaft sleeve through an insertion key, the periphery of the screw shaft sleeve is in threaded transmission connection with a screw shell, the lower part of the screw shell is connected with a pressing cap, the inner periphery of the lower end of the screw shaft sleeve is fixedly connected with a nozzle core, an annular space with an open lower part is arranged between the lower part of the nozzle core and the main driving shaft, the peripheral part of the nozzle core is provided with a radial water outlet, the periphery of the pressing cap is circumferentially provided with a water inlet, the gap sleeve of the periphery of the nozzle core corresponding to the radial water outlet is sleeved with a nozzle sleeve, the nozzle sleeve is arranged in the screw shell in a, the lower end of the nozzle sleeve and the upper end of the pressing cap are provided with a return spring which is axially abutted.

Description

Single-layer adjustable water nozzle

Technical Field

The utility model relates to an oil field layering water injection instrument field, in particular to be suitable for adjustable water injection well choke of individual layer of survey limit accent water.

Background

The single-layer adjustable blanking plug for the domestic oil field is widely applied and can be divided into a constant-flow blanking plug, a single-flow blanking plug and a closeable blanking plug according to functions. The problems that exist are that: 1. constant flow type injection amount less than 15m³The/d is difficult to control, the service life is short, a nozzle needs to be put into a seat for sealing, and the stratum cannot be directly plugged; 2. the single flow type is used for showing multiple distribution if the water distributor main body is provided with the function; 3. can be closed, can reduce one-time throwing and fishing, and when the control pressure difference is increased, the small injection allocation quantity is difficult to realize, especially the injection allocation quantity is less than 10m³Strata within/d.

For example, in a constant-flow and adjustable dual-function plug with patent number ZL201120065811.1, a water nozzle is made of hard alloy materials, and a balance spring is adopted to realize constant flow, so that the service life is prolonged, and the water distribution precision is improved. For example, an adjustable shut-off water nozzle with the patent number ZL201120065811.1 adopts a matching gap between a reducing shaft at the lower end of a threaded shaft and a valve sleeve to control flow, and utilizes a first sealing ring and a second sealing ring to realize shut-off. Zero leakage can be realized to two patents, all adopt fit clearance control flow, and minimum fit clearance is certain, can't change, and minimum injection allocation volume increases along with the increase of pressure differential, and the branch injection well that the difference is big between the layer is not adapted to little injection allocation volume.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a zero leakage quantity to be convenient for accurate regulation and control minimum injection allocation quantity, seat seal, tubular column pressure testing and individual layer stop annotating temporarily can be accomplished to a process, reduce the adjustable water injection well choke of individual layer of throwing and dragging for water injection well choke work load.

The utility model aims at realizing the same, a single-layer adjustable water nozzle comprises a fishing head, wherein the periphery of the fishing head is provided with a fishing component, the lower part of the fishing head is fixedly connected with a main driving shaft, the lower part of the main driving shaft is abutted against and connected with a tip cone, the periphery of the middle part of the main driving shaft is connected with a screw sleeve through an insertion key in a sliding way, the periphery of the screw sleeve is in threaded transmission connection with a screw shell, the upper part of the screw shell is fixedly connected with the fishing head component, the lower part of the screw shell is connected with a pressing cap, the pressing cap is sleeved with the main driving shaft annular space, the inner periphery of the bottom end is in threaded connection with the tip cone, the inner periphery of the lower end of the screw sleeve is fixedly connected with a nozzle core, an annular space with an open lower part is arranged between the lower part of the nozzle core and the main driving shaft, the periphery of the nozzle core is provided with, the nozzle sleeve is arranged in the screw shell in a floating mode, a sealing ring is arranged between the nozzle sleeve and the screw shell, a sealing abutting conical surface for opening and closing a radial water outlet is arranged at the position, matched with the nozzle core, of the inner periphery of the upper end of the nozzle sleeve, a limiting step is arranged on the inner periphery of the screw shell corresponding to the upper end of the nozzle sleeve, the water outlet is arranged on the upper side of the limiting step in the circumferential direction of the screw shell, and a reset spring for axial abutting is arranged at the lower end of the nozzle sleeve and the upper end of.

The utility model discloses an adjustable water injection well choke of individual layer's working process does: through the rotation of fishing head, drive main driving shaft and rotate, because main driving shaft and silk axle sleeve are through grafting key sliding connection, can rotate along with main driving shaft simultaneously, also can follow axial displacement, silk axle sleeve is connected with fixed silk shell is screw drive simultaneously, the rotation of silk axle sleeve drives the rotation of mouth core simultaneously, also follows axial displacement, realizes the axial motion of the relative mouth cover of mouth core to realize the switch of mouth in-core water distribution passageway and the regulation of switch size. In the utility model, the lower part and the upper part of the nozzle core are set into the reducing nozzle core, a conical sealing matching surface is arranged at the joint of the two diameters, a valve port for opening and closing the radial water outlet of the nozzle core is formed, and the radial water outlet is circumferentially arranged at the lower part of the valve port; a floating nozzle sleeve is designed, the two conical surface valve ports are tightly combined by utilizing a spring and pressure difference force, a backspacing gap during thread self-locking is eliminated, and the sealing effect is good; the annular fit clearance between the nozzle core and the nozzle sleeve and the opening and closing of the conical sealing surfaces are utilized to adjust the water quantity, when the two conical surfaces approach infinitely, the clearance at the matching surface is smaller than the annular fit clearance, the leakage quantity is further reduced, and when the nozzle core pushes the nozzle sleeve to move downwards to be completely combined with the two valve ports, zero leakage is realized; meanwhile, the small water amount can be accurately distributed and sealed and closed by adjusting the opening degree of the conical sealing surface, so that the mutual noninterference of water flows inside and outside the valve is ensured, and the work is reliable.

For the needs of further adaptation different stratums, different injection quantities, reduce the mouth and decrease, improve regulation efficiency, the radial delivery port of mouth core sets up 2 ~ 4 along the center pin symmetry, the shape of radial delivery port is the bottle shape of the inversion of big end down. The radial water outlet of the nozzle core is set to be a structure with a small upper part and a large lower part, so that accurate allocation during small injection allocation and quick response of large injection allocation can be ensured.

In order to facilitate the fixed connection of the nozzle core and the screw shaft sleeve, the nozzle core is in threaded connection with the screw shaft sleeve, and a reinforcing pin is arranged in the radial direction of the threaded connection part.

Furthermore, the periphery of the upper part of the screw shaft sleeve is sleeved with an upper spacer sleeve, the upper end of the upper spacer sleeve is in circumferential sealing sleeve joint with the main drive shaft, and the upper spacer sleeve floating seal sleeve is arranged between the screw shell and the fishing assembly.

For the screw-in depth of the limiting screw shaft sleeve, a lower spacer ring is arranged on the inner periphery of the screw shell on the upper side of the water outlet, the lower spacer ring and the screw shell are fixed through radial pins, the lower spacer ring is used for limiting the limit depth of the screw shaft sleeve screwed in the screw shell, a spring is arranged between the outer periphery of the screw shaft sleeve and the lower spacer ring, and an outer step which is convenient for the spring to abut against is arranged on the outer periphery of the screw shaft sleeve.

In order to facilitate reliable connection of the fishing head and the fishing assembly during working, the fishing assembly comprises a connecting sleeve sleeved on the outer periphery of the fishing head, an annular groove is formed in the circumferential direction of the fishing head and the connecting sleeve in a matched and sleeved mode, an anti-dropping pin extending into the annular groove is radially arranged on the connecting sleeve, an annular space is formed between the lower portion of the connecting sleeve and the fishing head, a spring is arranged in the annular space between the fishing head and the connecting sleeve, an outer connecting sleeve is in threaded connection with the inner periphery of the lower portion of the connecting sleeve, and the inner periphery of the lower portion of the outer connecting sleeve is in threaded; the inner periphery of the joint of the connecting sleeve and the outer connecting sleeve is provided with an inner limiting sleeve, and the main drive shaft on the lower side of the fishing head is connected with a cam through a rotating pin. The anti-drop pin is arranged between the connecting sleeve and the fishing head, when the water nozzle is adjusted, the fishing head does not limit the rotation movement, only the tension of axial movement is increased, firstly, the cam is prevented from entering the well in a release state, and secondly, the instrument blocking accident caused by the fact that the blanking plug is taken out when the measuring and adjusting instrument is lifted is avoided.

Drawings

Fig. 1 is a schematic structural view of the single-layer adjustable water nozzle of the present invention.

Fig. 2 is a schematic structural view of a mouth core.

Fig. 3 is a partial enlarged view of fig. 1 at E.

1, fishing a head; 2, preventing the pin from falling off; 3 connecting sleeves; 4, a spring; 5, an inner limiting sleeve; 6, externally connecting a sleeve; 7, a main driving shaft; 8, a cam; 9, rotating the pin; 10, arranging a spacer bush; 11 a spring; 12 wire shaft sleeves; 13, a silk shell; 13-1 inner step; 14 springs; 15 reinforcing pins; 16 mouth cores; 16-1 seals against the conical surface; 16-2 radial water outlet; 17, a mouth sleeve; 18 sealing rings; 19 pressing down the cap; 19-1 water inlet; 20, tip cone; 21 a return spring; 22 a seal ring; 23 water outlet; 24 lower spacer rings; 25 radial pins; 26. 27, 28 sealing ring.

Detailed Description

The utility model discloses a single-layer adjustable water nozzle, as shown in fig. 1-2, including fishing head 1, fishing head 1's periphery is provided with salvage assembly, in order to guarantee fishing head and salvage assembly during operation reliable connection, the utility model discloses a salvage assembly includes that fishing head 1 periphery covers the adapter sleeve 3 of establishing, fishing head 1 and adapter sleeve 3 cooperate the circumference of cup jointing to be equipped with the annular, adapter sleeve 3 radially is equipped with the anticreep round pin 2 that stretches into the annular, be equipped with the annular space between adapter sleeve 3 lower part and fishing head 1, be equipped with spring 4 in the annular space between fishing head 1 and adapter sleeve 3, adapter sleeve 3 lower part inner periphery threaded connection has outer connecting sleeve 6, outer connecting sleeve 6 lower part inner periphery and lower part wire shell 13 threaded seal connect; an inner limiting sleeve 5 is arranged on the inner periphery of the joint of the connecting sleeve 3 and the outer connecting sleeve 6, and a main drive shaft 7 on the lower side of the fishing head 1 is rotatably connected with a cam 8 through a rotating pin 9. The utility model discloses in, at the anticreep round pin 2 that sets up between adapter sleeve 3 and salvage head 1, during the water injection well choke transfer, salvage head 1 rotary motion not restrict, only increased axial displacement's pulling force, firstly avoid cam 8 to go into the well under the release state, secondly avoid measuring and transferring the instrument and carry out the instrument card accident that forms with the blanking plug when lifting.

The lower part of the fishing head 1 is connected with a main driving shaft 7 in a sliding mode through an inserting key, the lower part of the main driving shaft 7 is connected with a tip cone 20 in an abutting mode, the outer periphery of the middle part of the main driving shaft 7 is connected with a screw shaft sleeve 12 in a sliding mode through the inserting key, the outer periphery of the screw shaft sleeve 12 is connected with a screw shell 13 in a threaded mode through threads, the upper part of the screw shell 13 is connected with a fishing head assembly connecting sleeve 3 in a threaded mode and sealed through a sealing ring 27, the lower part of the screw shell 13 is connected with a pressing cap 19, the pressing cap 19 is sleeved with the annular space of the main driving shaft 7, the inner periphery of the bottom end of the pressing cap is connected with the tip cone 20 in a threaded mode, a nozzle core 16 is fixedly connected to the inner periphery of the lower end of the screw shaft sleeve 12, an annular space with the. The outer wall of the lower pressing cap on the upper side of the water inlet 19-1 and the outer wall of the screw shell on the upper side of the water outlet are respectively provided with a sealing ring 18 to be sealed with the inner wall of an external water distributor, so as to separate the external water inlet and outlet flow direction, a nozzle sleeve 17 is sleeved on the outer periphery of a nozzle core 16 corresponding to the radial water outlet 16-2 in a clearance mode, the nozzle sleeve 17 is arranged in the screw shell 13 in a floating mode, a sealing ring 22 is arranged between the nozzle sleeve 17 and the screw shell 13, the position, matched with the nozzle core 16, of the inner periphery of the upper end of the nozzle sleeve 17 is provided with a sealing abutting conical surface 16-1 for opening and closing the radial water outlet 16-2, as shown in figure 3, the inner periphery of the screw shell 13 corresponding to the upper end of the nozzle sleeve 17 is provided with a limiting step 13-1, the screw shell 13 on the.

In order to further adapt to the requirements of different stratums and different injection quantities, as shown in fig. 2, the radial water outlets 16-2 of the nozzle core 16 of the utility model are symmetrically arranged 2-4 along the central axis, and the radial water outlets 16-2 are in the shape of inverted bottles with big top and small bottom. The radial water outlet 16-2 of the nozzle core 16 is set to be a structure with a small upper part and a big lower part, when the nozzle core 16 moves upwards in the axial direction and the sealing conical surface is opened, the bottleneck part of the bottle-shaped radial water outlet is opened first, and accurate control is carried out when the water distribution requirement of small injection quantity is met; the large water outlet at the lower part realizes the quick response of large injection amount.

In order to facilitate the fixed connection of the nozzle core 16 and the screw shaft sleeve 12, the nozzle core 16 is in threaded connection with the screw shaft sleeve 12, and a reinforcing pin 15 is arranged in the radial direction of the threaded connection part.

In order to ensure the sealing connection of the connection structure of the upper side of the water nozzle, the upper spacer sleeve 10 is sleeved on the periphery of the upper part of the screw shaft sleeve 12, the sealing ring 28 is circumferentially arranged at the upper end of the upper spacer sleeve 10 and the main drive shaft 7 to realize sealing sleeve connection, the floating seal sleeve of the upper spacer sleeve is arranged between the screw shell and the fishing assembly, the specific connection structure is that the periphery of the upper part of the upper spacer sleeve 10 and the connection sleeve are sealed through the sealing ring 26, and the periphery of the lower part of the upper spacer sleeve 10 and the inner annular space of the connection sleeve 3 are.

In order to facilitate the screwing-in depth of the limiting screw shaft sleeve 12, a lower spacing ring 24 is arranged on the inner periphery of the screw shell 13 on the upper side of the water outlet 23, the lower spacing ring 24 and the screw shell 13 are fixed through a radial pin 25, the lower spacing ring 24 is used for limiting the screwing-in depth of the limiting screw shaft sleeve 12 into the screw shell 13, a spring 14 is arranged between the outer periphery of the screw shaft sleeve 12 and the lower spacing ring 24, and an outer step which is convenient for the spring 14 to abut against is arranged on the outer periphery of the screw.

Adopt the utility model discloses white above-mentioned adjustable water injection well choke working example of individual layer: the single-layer adjustable water nozzle is thrown into the eccentric water distributor, and is put into a well along with a pipe column, and the packer setting and the pipe column pressure test are completed by pressurizing from a well mouth; after the measuring and adjusting instrument is put into the well mouth and is in butt joint with the fishing head 1 of the single-layer adjustable water nozzle, the water injection is started when the measuring and adjusting instrument instructs to remove the sealing and closing state; the uploaded flow data is the actual injection amount of the layer, if the actual injection amount of the layer is not consistent with the injection amount of the geological design, the fishing head 7 is rotated to drive the main driving shaft 7, the screw shaft sleeve 12 rotates, and simultaneously, the screw shaft sleeve 12 and the screw shell 13 drive the nozzle core 16 to move up or down axially under the action of screw transmission so as to adjust the axial position of the nozzle core 16 relative to the nozzle sleeve 17, so that the injection amount is adjusted until the injection amount is qualified; when the multi-layer separate injection is carried out, if a certain layer needs to be stopped temporarily, a sealing closing instruction is given to the testing and adjusting instrument, and the closing is realized when the uploading flow is zero.

Claims

1. A single-layer adjustable water nozzle comprises a fishing head, wherein a fishing assembly is arranged on the periphery of the fishing head, a main driving shaft is fixedly connected to the lower portion of the fishing head, the lower portion of the main driving shaft is connected with a tip cone in an abutting mode, a wire sleeve is connected to the periphery of the middle portion of the main driving shaft in a sliding mode through an inserting key, a wire shell is connected to the periphery of the wire sleeve in a threaded transmission mode, the upper portion of the wire shell is fixedly connected with the fishing head assembly, a lower pressing cap is connected to the lower portion of the wire shell and sleeved with a main driving shaft annular space, the inner periphery of the bottom end of the main driving shaft is connected with the tip cone in a threaded mode, a nozzle core is fixedly connected to the inner periphery of the lower end of the wire sleeve, a lower portion open annular space is arranged between the lower portion of the nozzle core and the main driving shaft, a radial water outlet is arranged on the periphery of the nozzle core, a water, and a sealing ring is arranged between the nozzle sleeve and the screw shell, a sealing abutting conical surface for opening and closing a radial water outlet is arranged at the part of the inner periphery of the upper end of the nozzle sleeve, which is matched with the nozzle core, a limiting step is arranged on the inner periphery of the screw shell corresponding to the upper end of the nozzle sleeve, the water outlet is arranged in the circumferential direction of the screw shell at the upper side of the limiting step, and a spring axially abutted is arranged at the lower end of the nozzle sleeve and the upper end of the pressing cap.

2. The single-layer adjustable water nozzle as claimed in claim 1, wherein 2-4 radial water outlets are symmetrically arranged along the central axis of the nozzle core, and the radial water outlets are in the shape of an inverted bottle with a large top and a small bottom.

3. The single-layer adjustable water nozzle as claimed in claim 1, wherein the nozzle core is in threaded connection with the threaded sleeve, and a reinforcing pin is arranged radially at the threaded connection part.

4. The single-layer adjustable water nozzle as claimed in claim 1, wherein an upper spacer sleeve is sleeved on the periphery of the upper portion of the screw shaft sleeve, the upper end of the upper spacer sleeve is circumferentially and hermetically sleeved with the main drive shaft, and the upper spacer sleeve is arranged between the screw shell and the fishing assembly in a floating sealing manner.

5. The single-layer adjustable water nozzle as claimed in claim 4, wherein the inner periphery of the screw shell at the upper side of the water outlet is provided with a lower spacer ring, the lower spacer ring and the screw shell are fixed through radial pins, the lower spacer ring is used for limiting the limit depth of the screw shaft sleeve screwed into the screw shell, a spring is arranged between the outer periphery of the screw shaft sleeve and the lower spacer ring, and the outer periphery of the screw shaft sleeve is provided with an outer step which is convenient for the spring to abut against.

6. The single-layer adjustable water nozzle as claimed in claim 1, wherein the fishing assembly comprises a connecting sleeve sleeved on the outer periphery of the fishing head, an annular groove is formed in the circumferential direction of the fishing head and the connecting sleeve, the connecting sleeve is radially provided with a drop-proof pin extending into the annular groove, an annular space is formed between the lower part of the connecting sleeve and the fishing head, a spring is arranged in the annular space between the fishing head and the connecting sleeve, an outer connecting sleeve is connected to the inner periphery of the lower part of the connecting sleeve in a threaded manner, and the inner periphery of the lower part of the outer connecting sleeve is connected with the thread shell in a threaded manner in; the inner periphery of the joint of the connecting sleeve and the outer connecting sleeve is provided with an inner limiting sleeve, and the main drive shaft on the lower side of the fishing head is connected with a cam through a rotating pin.