CN103375152A

CN103375152A - Adjustable plug capable of simultaneously controlling one water nozzle to be opened and the other closed

Info

Publication number: CN103375152A
Application number: CN2013103453850A
Authority: CN
Inventors: 石建设; 彭中; 纪艳娟; 刘松林; 吴波; 夏兰
Original assignee: 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: 2013-08-09
Filing date: 2013-08-09
Publication date: 2013-10-30
Anticipated expiration: 2033-08-09
Also published as: CN103375152B

Abstract

The invention discloses an adjustable plug capable of simultaneously controlling one water nozzle to be opened and the other closed, and relates to the technical field of oil fields, in particular to a water division plug of a packing water distributor in the field of oil field separated layer water injection, namely, a water division tool for simultaneous measurement and allocation on water amounts of two layers. The adjustable plug capable of simultaneously controlling one water nozzle to be opened and the other closed comprises a fishing head, an upper outer shell, a middle outer shell, a lower outer shell and a lower connector, wherein the fishing head, the upper outer shell, the middle outer shell, the lower outer shell and the lower connector are mutually and sequentially connected in the axial direction. An upper water outlet is formed in the side wall of the upper outer shell, an upper water inlet is formed in the side wall of the middle outer shell, a lower water outlet is formed in the side wall of the lower outer shell, and a lower water inlet is formed in the lower connector. The adjustable plug capable of simultaneously controlling one water nozzle to be opened and the other closed can solve the problem of water distribution difficultly caused by large difference of water absorbing capacities of two adjacent oil layers and the problems of allocation difficulty of the water volumes of multiple injection allocation equant layers and the like.

Description

Two-layer water nozzle is controlled simultaneously one and is opened an adjustable blanking plug that closes

Technical field

The present invention relates to the oilfield technology field, the water distribution plug of separated-zone water infection oil field field packing water distributor particularly, the water-distributing tool that the especially two-layer water yield is transferred with pacing.

Background technology

The two-layer blanking plug of the eccentric integrated packing water distributor that each oil field is newly developed, built-in two water nozzles, the size of water nozzle is fixed, and needs during replacing to pull out from the down-hole, drops into again, and workload is large; Adopt storing flow during the test allotment, data need arrive the ground playback, need repeatedly throw, drag for according to the two-layer blanking plug of test case, along with the increase of layering progression, have prolonged the survey accent cycle, have increased cost of production and labour intensity.

The individual layer stopper with adjustable low that separated-zone water infection oil field is commonly used: 1. poly-expelling water drives electronic adjustable water nozzle (patent No. 201220147780.9), 2. singly opens screwed adjustable blanking plug (patent No. 200920216267.9); Two patents have only realized individual layer blanking plug flow measuring and adjusting, all do not relate to two-layer blanking plug flow measuring and adjusting.

Existing Intelligent testing conditioning technology: marginal not is transferred the accent intelligent synchronization concocting method while surveying described in the intelligent synchronization measuring and regulating method (patent No. 200910013016.5) while surveying, main existing problems: 1. cost is high, every the injection well downhole flow regulator in down-hole all needs an intelligent measurement and adjustment instrument, and the many testers of the number of plies are just many; 2. workload is large and reliability is low, and every intelligent measurement and adjustment instrument all needs to drop into piano wire, finish to dock with water distribution plug and throw off two actions; 3. test accuracy is low, many errors that intelligent measurement and adjustment instrument self exists; 4. adopt storing flow, data need arrive the ground playback, have prolonged the survey accent cycle; 5. every intelligent measurement and adjustment instrument can only be finished one deck and survey accent.

The oil field is in the water flooding recovery process, and the water absorbing capacity of each oil-producing formation there are differences, and the oil reservoir of identical water absorbing capacity is because the difference of injection allocation amount also can produce difference, and allotment has increased difficulty to stratified water amount like this; Face two oil reservoir water absorbing capacities by a minute phase separation and have following 3 kinds of situations: 1. the upper strata strata pressure is low, suction good and lower floor's strata pressure is high, suction is poor; 2. strata pressure and water absorbing capacity are identical; 3. lower floor's strata pressure is low, suction good and strata pressure high suction in upper strata is poor.

Summary of the invention

The present invention seeks to propose a kind of employing and once control, realize that simultaneously upper and lower two-layer water nozzle processes one and open one and close the adjustable blanking plug of effect.

The present invention includes the fishing head, upper shell, housing, lower casing and the lower contact that mutually axially connect successively, offer the upper water-out mouth at the sidewall of upper shell, offer water inlet at the sidewall of housing, sidewall at lower casing is offered lower outlet, offer lower water inlet in lower contact, it is characterized in that in described fishing head axially grafting driving shaft, outer being equipped with driven cover at the driving shaft middle part, the driving shaft lower end and under drive the set upper side and mutually be axial grafting; At driving shaft and drive a silk axle is set between the cover, on drive the cover bottom inner surface be mutual grafting by keyway and driving key outside the upper silk axle; Between the upper shell below the described upper water-out mouth and driving shaft, muzzle is set, described upper muzzle is fixedly installed in the shell, on described, cooperate an axially movable upper mouth core in the muzzle, described upper mouth core is fixedly connected on described upper silk axle lower end, between silk axle and the upper shell silk braid is set on described, described upper axle is threaded with upper silk braid; Lower casing below described lower outlet is fixedly installed lower muzzle, cooperates an axially movable lower mouth core in described lower muzzle, and described lower mouth core is fixedly connected on silk axle lower end; The upper end of a described lower axle is connected to by the underdrive key and drives in the cover under described, between a described lower axle and lower casing, lower silk braid is set, lower silk braid is threaded with a lower axle, lower casing respectively, and described upper silk axle is opposite with the thread rotary orientation between a lower axle and the lower silk braid with thread rotary orientation between the upper silk braid.

During reset condition, initially being equipped with of the initial cooperation between above-mentioned upper mouth core and the upper muzzle and lower mouth core and lower muzzle is out that one closes; Or the opening of two-layer water nozzle is set to: identical, up big and down small, up-small and down-big.One group of water nozzle opening is made as standard-sized sheet as inciting somebody to action first wherein, another group water nozzle opening is made as full cut-off, drop into again in the seating nipple of eccentric integrated packing water distributor and namely realize two-layer water distribution, because upper silk axle is opposite with the thread rotary orientation between a lower axle and the lower silk braid with hand of spiral between the upper silk braid, when drive shaft turns, the moving direction of upper mouth core and lower mouth core is opposite.So when adopting same driving shaft to carry out positive and negative rotation, can realize respectively that one of two groups of water nozzles open one and close.Can require directly to regulate in the down-hole according to measured data and two-layer injection allocation during layering allotment of the present invention, need not repeat the pulling blanking plug, simplify to survey and transferred operation, improve testing efficiency, test accuracy.

The present invention can solve the problems such as the contradiction of facing mutually the large water distribution difficulty of two oil reservoir water absorbing capacity differences and the difficult allotment of the multilayer injection allocation hierarchical water yield.Be specially: 1. the upper strata strata pressure is low, suction good and lower floor's strata pressure is high, suction is poor; 2. two strata pressures and water absorbing capacity are identical, but water distribution quantity is different; 3. lower floor's strata pressure is low, suction good and strata pressure high suction in upper strata is poor.Improve the flow rate test accuracy rate, improve allotment efficient, reduce labour intensity.

In order to prevent the phase mutual interference play between each entery and delivery port, the present invention also can the periphery of the upper shell above the upper water-out mouth, between upper water inlet and upper water-out mouth upper shell periphery, in the lower casing periphery between upper water inlet and the lower outlet, lower contact periphery between lower water inlet and lower outlet sealing ring is set respectively.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention.

The specific embodiment

As shown in Figure 1, the present invention is provided with fishing head 1, upper shell 6, housing 11, lower casing 14 and the lower contact 17 that mutually axially connects successively, offer upper water-out mouth 6-1 at the sidewall of upper shell 6, offer water inlet 11-1 at the sidewall of housing 11, offer lower outlet 14-1 at the sidewall of lower casing 14, offer lower water inlet 17-1 in lower contact 17.

At fishing head 1 interior axial grafting driving shaft 2, outside driving shaft 2 middle parts, be equipped with and drive cover 3, and in fishing head 1 lower end interior step surface 2-1 is set.

Driving shaft 2 lower ends are overlapped 13 upper ends and mutually are axial grafting with lower driving; At driving shaft 2 and drive cover a silk axle 5 is set between 3, on drive cover 3 bottoms the driving key 5-1 of inner surface by keyway and upper axle 5 outsides be mutual grafting.

Driving the upper spring 4 that arranges between cover 3 and the fishing head 1 with axially parallel, between the upper shell 6 below the upper water-out mouth 6-1 and driving shaft 2, muzzle 9 is set, upper muzzle 9 is fixedly installed in the shell 6, at the axially movable upper mouth core 8 of the interior cooperation of upper muzzle 9 one, upper mouth core 8 is fixedly connected on described upper silk axle 5 lower ends, between upper silk axle 5 and upper shell 6 silk braid 7 is set, upper silk braid 7 is connected with upper shell 6 by the upper pin 18 that radially arranges, and upper silk axle 5 is threaded with upper silk braid 7.

Lower casing 14 below lower outlet 14-1 is fixedly installed lower muzzle 20, and at the axially movable lower mouth core 19 of the interior cooperation of lower muzzle 20 one, lower mouth core 19 is fixedly connected on silk axle 15 lower ends.

The upper end of lower silk axle 15 is connected to described lower driving by underdrive key 15-1 and overlaps in 13, drive down arrange between cover 13 and the housing 11 seal 12 and with the lower spring 21 of axially parallel, lower silk braid 22 is set between a lower axle 15 and lower casing 14, lower silk braid 22 is threaded with a lower axle 15, lower casing 14 respectively, and lower bearing pin 16 radially is set between lower silk braid 22 and lower casing 14.

Upper silk axle 5 is opposite with the hand of spiral between a lower axle 15 and the lower silk braid 22 with hand of spiral between the upper silk braid 7.

The periphery of the upper shell 6 above upper water-out mouth 6-1 arranges sealing ring 23, the periphery of the upper shell between upper water inlet 11-1 and upper water-out mouth 6-1 arranges sealing ring 10, lower casing 14 peripheries between upper water inlet 11-1 and lower outlet 14-1 arrange sealing ring 24, and lower contact 17 peripheries between lower water inlet 17-1 and lower outlet 14-1 arrange respectively sealing ring 25.

Operating principle: measurement and adjustment instrument is given driving shaft 2 revolving forces by fishing head 1, driving shaft 2 by on drive cover 3 and drive upper silk axle 5 and rotate, driving shaft 2 by under drive cover 13 and drive a lower axle 15 rotations.1. when driving shaft 2 up times are rotated: because upper muzzle 9 maintains static, upper silk axle 5 and upper mouth core 8 move down and screw in the upper mouth overcoat 9, and the radially water channel 8-1 of upper mouth core 8 is turned down gradually, and injection rate is turned down; Because the lower muzzle 20 of lower floor's adjustable water nozzle maintains static, lower silk axle 15 and lower mouth core 19 move up and screw out in the lower muzzle 20, and the radially water channel of lower mouth core 19 is opened greatly gradually, and injection rate tunes up; The realization upper strata is closed, lower floor's standard-sized sheet.2. when driving shaft 2 backward rotation: the upper muzzle 9 of upper strata adjustable water nozzle maintains static, and upper silk axle 5 and upper mouth core 8 move up and screw out in the upper muzzle 9, and the radially water channel of upper mouth core 8 is opened greatly gradually, and injection rate tunes up; The lower muzzle 20 of lower floor's adjustable water nozzle maintains static, and lower silk axle 15 and lower mouth core 19 move down and screw in the lower mouth overcoat 20, and the radially water channel of lower mouth core 19 is turned down gradually, and injection rate is turned down; Realize the upper strata standard-sized sheet, lower floor closes.3. when driving shaft 2 up times or backward rotation during to the centre position, the opening of upper mouth core 8, upper mouth overcoat 9 can be set to three kinds of states with the opening of lower mouth core 19, lower mouth overcoat 20: identical, up big and down small, up-small and down-big.

Claims

1. two-layer water nozzle is controlled simultaneously one and is opened an adjustable blanking plug that closes, comprise the fishing head, upper shell, housing, lower casing and the lower contact that mutually axially connect successively, offer the upper water-out mouth at the sidewall of upper shell, offer water inlet at the sidewall of housing, sidewall at lower casing is offered lower outlet, offer lower water inlet in lower contact, it is characterized in that axial grafting driving shaft in described fishing head, outer being equipped with driven cover at driving shaft middle part, the driving shaft lower end and under drive the set upper side and mutually be axial grafting; At driving shaft and drive a silk axle is set between the cover, on drive the cover bottom inner surface be mutual grafting by keyway and driving key outside the upper silk axle; Between the upper shell below the described upper water-out mouth and driving shaft, muzzle is set, described upper muzzle is fixedly installed in the shell, on described, cooperate an axially movable upper mouth core in the muzzle, described upper mouth core is fixedly connected on described upper silk axle lower end, between silk axle and the upper shell silk braid is set on described, described upper axle is threaded with upper silk braid; Lower casing below described lower outlet is fixedly installed lower muzzle, cooperates an axially movable lower mouth core in described lower muzzle, and described lower mouth core is fixedly connected on silk axle lower end; The upper end of a described lower axle is connected to by the underdrive key and drives in the cover under described, between a described lower axle and lower casing, lower silk braid is set, lower silk braid is threaded with a lower axle, lower casing respectively, and described upper silk axle is opposite with the thread rotary orientation between a lower axle and the lower silk braid with thread rotary orientation between the upper silk braid.

2. described two-layer water nozzle is controlled simultaneously one and is opened an adjustable blanking plug that closes according to claim 1, it is characterized in that periphery, the upper shell between upper water inlet and upper water-out mouth at the upper shell above the upper water-out mouth periphery, in the lower casing periphery between upper water inlet and the lower outlet, lower contact periphery between lower water inlet and lower outlet sealing ring is set respectively.