CN103375151A

CN103375151A - Clutch drive type double-layer adjustable plug

Info

Publication number: CN103375151A
Application number: CN2013103450034A
Authority: CN
Inventors: 石建设; 刘松林; 彭太祥; 聂厚文; 吴昭; 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: CN103375151B

Abstract

The invention discloses a clutch drive type double-layer adjustable plug, and relates to the technical field of water distribution plug structures of eccentric subdivision packing water distributors in the field of separated layer water injection of an oil field water injection well. The clutch drive type double-layer adjustable plug comprises a fishing head, a drive shaft, an upper outer shell, a lower outer shell, a lower connector, an upper screw shaft, an upper nozzle core, an upper nozzle outer sleeve, a lower ratchet, a lower nozzle core, a lower nozzle outer sleeve and the like, wherein the upper screw shaft is connected in the middle of an upper drive sleeve through a driving key. According to the clutch drive type double-layer adjustable plug, flow measurement on two layers can be completed through one-time underground butt joint, and besides, allocation and measurement are carried out according to injection allocation amounts of the two layers; the accuracy rate in flow measurement on each single layer and allocation efficiency in the process of subdivision water injection of a plurality of thin interlayers are improved, and labor intensity is reduced.

Description

The two-layer adjustable blanking plug of clutch drive-type

Technical field

The present invention relates to the water distribution plug technical field of structures of the eccentric segmentation in a kind of water injection well in oil fields seperated layer water injection field packing water distributor, the especially two-layer water yield is surveyed the water-distributing tool of accent simultaneously.

Background technology

The common individual layer blanking plug of the most frequently used common eccentric injection mandrel of separated-zone water infection oil field, but be not suitable with a plurality of short lap segmentations, the injection well downhole flow regulator spacing must be greater than 8 meters technical barrier.Although each oil field eccentric subdivision injection technique newly developed has solved lesser calorie apart from problem, the blanking plug in the eccentric packing water distributor, built-in two water nozzles, the size of water nozzle is fixed, and is the same with the individual layer blanking plug during replacing, needs to pull out from the down-hole, drop into, workload is large again; 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.

Be used at present the adjustable flow blanking plug of down-hole, will progressively replace the common blanking plug of individual layer, it is low to have solved many single-interval tests accuracy rate, water filling allotment difficulty; The problems such as pulling efficient is low, testing efficiency is low; Such as 1. a kind of adjustable water nozzle for the little water injection rate well in oil field (patent No. 200920245845.1); 2. stopper with adjustable low (patent No. 201120354427.3); 3. constant current and adjustable dual functional blanking plug (patent No. 201120065811.1); Realize the individual layer flow measuring and adjusting, all do not related to two-layer flow measuring and adjusting.

Summary of the invention

The present invention seeks to propose a kind of two-layer adjustable blanking plug of clutch drive-type with upper and lower two adjustable water nozzles.

The present invention includes the driving shaft that is connected with fishing head, connect shell in the fishing head lower end in the driving shaft outside, lower end at upper shell connects lower casing, lower end at lower casing connects lower contact, it is characterized in that cooperating with the spline housing that drives the set upper side inner surface by spline in the outside, driving shaft middle part, connect the silk axle by driving key at the described cover middle part of driving, described upper silk axle sleeve is put outside driving shaft, the upper end of silk axle arranges with spending of driving shaft and is good for corresponding spline chamber on described, lower end at upper silk axle is fixedly connected with the mouth core, on described outside the mouth core axially the upper mouth overcoat that cooperates of slidingtype be fixed in the shell, the upper shell on described above the mouth overcoat is offered the upper water-out mouth; Limit-type in the driving shaft lower end lower ratchet is set; In described lower casing, arrange to projecting inward step, the spline that makes driving shaft and the spline housing that drives cover are set between described step and described lower ratchet are the state that often closes, and make the lower ratchet that is enclosed within the driving shaft lower end overlap the back-moving spring that is normally open with lower driving; The water inlet of offering at described lower casing, on the lower casing below the upper water inlet, also offer lower outlet, offer lower water inlet in lower contact, lower mouth core and the lower mouth overcoat that cooperatively interacts is set between described lower outlet and lower water inlet, described lower mouth overcoat is fixedly installed in the lower casing of lower outlet below, described lower mouth core is fixedly connected on the lower end of a lower axle, and lower mouth overcoat is fixed in the lower casing; The upper end of a described lower axle is connected to down the lower end of driving cover by the underdrive key, drives under described to be set in the lower casing, and lower driving between cover and the lower casing arranges spring.

The present invention is provided with two adjustable water nozzles, action one: regulate the position relationship of upper mouth core and upper mouth overcoat when driving shaft directly rotates, to by upper water inlet through upper mouth overcoat, regulate from the upper strata water yield of upper water-out mouth discharge; Action two: give first descending power of driving shaft, the spline at driving shaft middle part with on drive the cover disengagement, the lower ratchet of driving shaft bottom drives the position relationship of lower mouth core and lower mouth overcoat, to by lower water inlet through lower mouth overcoat, regulate from lower floor's water yield of lower outlet discharge.Characteristics of the present invention are: 1. two adjustable water nozzles share a driving shaft; 2. when drive shaft upper water muzzle, lower floor's water nozzle is motionless; 3. when drive shaft lower layer of water muzzle and the upper strata water nozzle throw off; 4. driving shaft can positive and negatively rotate, and water nozzle is turned down gradually or opens gradually large.Two-layer flow rate test is once namely finished in docking so that measurement and adjustment instrument is gone into the well, and allocates and test according to two-layer injection allocation amount; Each individual layer flow rate test accuracy rate and allotment efficient reduce labour intensity when improving a plurality of short lap subdivision injection.

The present invention is dropped in the seating nipple of eccentric integrated packing water distributor, can realize respectively two-layer water distribution, in layering when allotment, can require directly carry out in the down-hole according to measured data and two-layer injection allocation, need not the pulling blanking plug, simplify traditional survey and transferred operation, improved testing efficiency, test accuracy.

The topmost meaning of the present invention is that the measurement and adjustment instrument docking of going into the well once namely finishes two-layer flow rate test, and allocates and tests according to two-layer injection allocation amount; Each individual layer flow rate test accuracy rate and allotment efficient reduce labour intensity when improving a plurality of short lap subdivision injection.

In addition, produce for convenient, the present invention arranges silk braid between upper silk axle and upper shell, and described upper silk braid is threaded in outside the silk axle, and upper silk braid is fixedly connected with upper shell; Between a lower axle and lower casing lower silk braid is set, described lower silk braid is threaded in outside the lower axle, and lower silk braid is fixedly connected with lower casing.

In addition, between upper silk braid and upper shell, arrange radially upper fixed pin shaft and a lower axle and lower casing between the rationed marketing axle is set is a kind of mode that is fixedly connected with of the present invention.

Ratchet is nested with outside driving shaft under the described overcoat, and the upper end of described lower ratchet is limited in the step surface below of driving shaft lower end.

In order to separate the water quality of different intake-outlets, the present invention also the upper shell periphery above the upper water inlet, between upper water inlet and upper water-out mouth the lower casing periphery, in the lower casing periphery between upper water inlet and the lower outlet, the O sealing ring is set respectively between lower water inlet and lower outlet.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the present invention.

The specific embodiment

The driving shaft 3 that the present invention is provided with fishing head 1, is connected with fishing head 1 connects shell 7 in fishing head 1 lower end in driving shaft 3 outsides, connects lower casing 13 in the lower end of upper shell 7, connects lower contact 20 in the lower end of lower casing 13.

Between the upper shell 7 of fishing head 1 lower end and driving shaft 3, arrange and drive cover 4, and driving the spring 5 that arranges between cover 4 and fishing head 1 lower end with axially parallel.

Cooperate with the spline housing 4-1 that drives cover 4 upper end inner surfaces by spline 3-1 in the outside, driving shaft 3 middle parts, connect silk axle 6 by driving key driving cover 4 middle parts, upper silk axle 6 is nested with outside driving shaft 3, between upper silk axle 6 and upper shell 7, silk braid 8 is set, upper silk braid 8 is threaded in outside the silk axle 6, and upper fixed pin shaft 28 radially is set between upper silk braid 8 and upper shell 7.

The spline chamber 6-2 corresponding with the strong 3-1 of spending of driving shaft 3 is set in the upper end of upper silk axle 6, lower end at upper silk axle 6 is fixedly connected with mouth core 9, the upper mouth overcoat 10 that cooperates at upper mouth core 9 outer axial slidingtypes is fixed in the shell 7, and the upper shell 7 above upper mouth overcoat 10 is offered upper water-out mouth 7-1.

Limit-type in driving shaft 3 lower ends lower ratchet 11 is set, ratchet 11 is nested with outside driving shaft 3 under the overcoat, and the upper end of lower ratchet 11 is limited in the step surface 3-2 below of driving shaft 3 lower ends.

Lower casing 13 interior settings to projecting inward step 13-3, the spline 3-1 that makes driving shaft 3 and the spline housing 4-1 that drives cover 4 are set between step 13-3 and lower ratchet 11 are the state that often closes, and make the lower ratchet 11 that is enclosed within driving shaft 3 lower ends and drive down the back-moving spring 12 that cover 15 is normally open, offer water inlet 13-1 at lower casing 13, on the lower casing 13 below the upper water inlet 13-1, also offer lower outlet 13-2, offer lower water inlet 20-1 in lower contact 20.

Lower mouth core 19 and the lower mouth overcoat 23 cooperatively interact are set between lower outlet 13-2 and lower water inlet 20-1, and lower mouth overcoat 23 is fixedly installed in the lower casing 13 of lower outlet 13-2 below, lower mouth core 19 by the time screw 18 be fixedly connected in the lower axle 16.The upper end of lower silk axle 16 is connected to down to drive by underdrive key 16-1 overlaps 15 lower end, and the lower cover 15 that drives is arranged in the lower casing 13, and lower driving between cover 15 and the lower casing 13 arranges spring 24.

Lower silk braid 22 is set between a lower axle 16 and lower casing 13, and the upper end of lower silk braid 22 is threaded on the lower axle 16, and lower fixed pin shaft 17 is set between lower silk braid 22 and lower casing 13.

Upper shell 7 peripheries above upper water inlet 13-1 arrange O sealing ring 25, lower casing 13 peripheries between upper water inlet 13-1 and upper water-out mouth 7-1 arrange O sealing ring 26, lower casing 13 peripheries between upper water inlet 13-1 and lower outlet 13-2 arrange O sealing ring 27, between lower water inlet 20-1 and lower outlet 13-2 O sealing ring 21 are set respectively.

Details are as follows for operating principle of the present invention:

Upper adjustable water nozzle of the present invention by on drive cover 4, upper silk axle 6, upper silk braid 8, upper mouth core 9 and upper mouth overcoat 10 etc. and consist of; Lower adjustable water nozzle by under drive cover 15, a lower axle 16, lower silk braid 22, screw 18, lower mouth core 19 and mouth overcoat 10 etc. and consist of.

Clutch drives component part: the spline 3-1 at driving shaft 3 middle parts with on drive the spline housing 4-1 that overlaps 4 tops and under the effect of back-moving spring 12, be always the state that often closes; Lower ratchet 11 is being separated position with the lower cover 15 that drives naturally under the effect of back-moving spring 12.

The present invention is dropped in the off-centre segmentation packing water distributor of dispensing well and namely begin seperated layer water injection; Measurement and adjustment instrument is lowered to after the fishing head 1 of the two-layer adjustable blanking plug of clutch drive-type docks from well head, the data on flows of uploading is the actual injection rate of upper and lower layer, if be not inconsistent with geological design injection allocation amount, can give the measurement and adjustment instrument instruction, regulate two-layer injection rate until qualified.

The upper strata water yield is adjusted: measurement and adjustment instrument is given driving shaft 3 revolving forces by fishing head 1, driving shaft 3 by on drive cover 4 and drive silk axle 6 and rotate, because upper silk axle 6 can be realized positive and negative screwing with upper silk braid 8, can make silk axle 6, upper mouth core 9 produce downward or upward motion.Because upper mouth overcoat 10 maintains static, when upper mouth core 9 screws in upper mouth overcoat 10 when interior, upper mouth core 9 radially water channel is turned down gradually, and injection rate is turned down; And screw out upper mouth overcoat 10 when interior when upper mouth core 9, and upper mouth core 9 radially water channel is opened greatly gradually, and injection rate tunes up.

The lower floor water yield is adjusted: give first 3 one downward thrusts of driving shaft by fishing head 1, the spline 3-1 at driving shaft 3 middle parts enters among the spline chamber 6-2 of silk axle 6, this moment driving shaft 3 with on drive cover 4 and throw off; Measurement and adjustment instrument is during to revolving force, driving shaft 3 by under drive cover 15 and drive a lower axle 16 and rotate because a lower axle 16 and lower silk braid 22 can be realized positive and negative screwing, a

lower axle

16,19 generations of lower mouth core are moved downward or upward.Because lower mouth overcoat 23 maintains static, mouth core 19 screws in lower mouth overcoat 23 when interior instantly, and lower mouth core 19 radially water channel is turned down gradually, and injection rate is turned down; And mouth core 19 screws out lower mouth overcoat 23 when interior instantly, and lower mouth core 19 radially water channel is opened greatly gradually, and injection rate tunes up.

Claims

1. the two-layer adjustable blanking plug of clutch drive-type, comprise fishing head, the driving shaft that is connected with fishing head, connect shell in the fishing head lower end in the driving shaft outside, lower end at upper shell connects lower casing, lower end at lower casing connects lower contact, it is characterized in that cooperating with the spline housing that drives the set upper side inner surface by spline in the outside, driving shaft middle part, connect the silk axle by driving key at the described cover middle part of driving, described upper silk axle sleeve is put outside driving shaft, the upper end of silk axle arranges with spending of driving shaft and is good for corresponding spline chamber on described, lower end at upper silk axle is fixedly connected with the mouth core, on described outside the mouth core axially the upper mouth overcoat that cooperates of slidingtype be fixed in the shell, the upper shell on described above the mouth overcoat is offered the upper water-out mouth; Limit-type in the driving shaft lower end lower ratchet is set; In described lower casing, arrange to projecting inward step, the spline that makes driving shaft and the spline housing that drives cover are set between described step and described lower ratchet are the state that often closes, and make the lower ratchet that is enclosed within the driving shaft lower end overlap the back-moving spring that is normally open with lower driving; The water inlet of offering at described lower casing, on the lower casing below the upper water inlet, also offer lower outlet, offer lower water inlet in lower contact, lower mouth core and the lower mouth overcoat that cooperatively interacts is set between described lower outlet and lower water inlet, described lower mouth overcoat is fixedly installed in the lower casing of lower outlet below, described lower mouth core is fixedly connected on the lower end of a lower axle, and lower mouth overcoat is fixed in the lower casing; The upper end of a described lower axle is connected to down the lower end of driving cover by the underdrive key, drives under described to be set in the lower casing, and lower driving between cover and the lower casing arranges spring.

2. the two-layer adjustable blanking plug of described clutch drive-type according to claim 1 is characterized in that between upper silk axle and upper shell silk braid being set, and described upper silk braid is threaded in outside the silk axle, and upper silk braid is fixedly connected with upper shell; Between a lower axle and lower casing lower silk braid is set, described lower silk braid is threaded in outside the lower axle, and lower silk braid is fixedly connected with lower casing.

3. the two-layer adjustable blanking plug of described clutch drive-type according to claim 1 and 2 is characterized in that described lower ratchet is nested with outside driving shaft, and the upper end of described lower ratchet is limited in the step surface below of driving shaft lower end.

4. the two-layer adjustable blanking plug of described clutch drive-type according to claim 1, it is characterized in that the upper shell periphery above the upper water inlet, between upper water inlet and upper water-out mouth the lower casing periphery, in the lower casing periphery between upper water inlet and the lower outlet, the O sealing ring is set respectively between lower water inlet and lower outlet.