CN203239260U

CN203239260U - Down-hole remote-control locking device

Info

Publication number: CN203239260U
Application number: CN 201320118287
Authority: CN
Inventors: 林雅玲; 崔凯; 徐丙贵; 郭慧娟; 王雪
Original assignee: China National Petroleum Corp; CNPC Drilling Research Institute Co Ltd
Current assignee: China National Petroleum Corp; CNPC Engineering Technology R&D Co Ltd
Priority date: 2013-03-15
Filing date: 2013-03-15
Publication date: 2013-10-16
Anticipated expiration: 2023-03-15

Abstract

The utility model discloses a down-hole remote-control locking device, and belongs to the technical field of petroleum and natural gas drilling. Bypass holes are formed in a body, a locked body and an unlocking sleeve, the locked body is installed on the inner side of the body, the unlocking sleeve is installed on the outer side of the body, and the body is connected with an upper shell body through threads. Grooves are formed in the middle of the body, locking blocks are installed in the grooves of the body, the number of the locking blocks in the circumferential direction is at least two, and the number of the grooves of the body in the circumferential direction is at least two. Grooves are formed in the middle of the locked body, and the tooth-shaped axial section of each groove is meshed with each locking block. A ring-shaped groove is formed in the inner side of the lower portion of the unlocking sleeve, and is matched with slope bosses of the locking blocks. An unlocking sleeve spring is arranged in a ring-shaped space formed between the unlocking sleeve and the upper end face of the pitch diameter portion of the body, and a locked body spring is arranged in a ring-shaped space formed between the lower portion of the locked body and the side face of the large-diameter end of the body. A seal ring is arranged at the position, corresponding to the body, of the unlocking sleeve. The down-hole remote-control locking device achieves repeated locking and release of components.

Description

Down-hole remote-controlled lock locking apparatus

Technical field

The utility model relates to down-hole remote-controlled lock locking apparatus.Belong to oil, gas drilling technical field.

Background technology

In the downhole tool design of oil drilling, a lot of situations all can relate to locking and the release function of a certain parts in the instrument.The lockable mechanism that uses in the most instrument has the following disadvantages: some mechanism can not come by the mode of ground remote control locking and the release of the lockable mechanism in the manipulation tool, is unfavorable for the control of instrument; Some mechanism is fixed two parts by pin, when needs separate, mode by pitching increases pressure reduction and cuts off pin and realize separating, this mechanism can only be used for discharging lockable mechanism once, can not reuse, and not being suitable for the down-hole needs the repeatedly instrument of control, and underground working is complicated, sometimes unexpected impact force also might cause pin to be interrupted, and parts discharge in advance, cause adverse consequences; Some tool applications distinguish elastic claw mechanism or radial piston retaining mechanism are realized locking and release function, the axial dimension of elastic claw mechanism is long, when bearing larger end thrust, can occur to throw off the phenomenon that discharges, the radial piston retaining mechanism exists contact area little, and stress is large, the shortcoming that lost efficacy easily, and these two kinds of mechanisms all require at first should determine first the to axial position of two parts, trigger the action of lock sleeve or radial piston again and carry out locking, operate comparatively loaded down with trivial details.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides down-hole remote-controlled lock locking apparatus.

Down-hole remote-controlled lock locking apparatus is by upper shell, by lock body, release sleeve spring, separate lock barrel, lock dog, body, formed by the lock body spring; Body, conciliate on the lock barrel by lock body and to be had by-pass prot; Be installed on the body inboard by lock body, separate the outside that lock barrel is installed on body, body and upper shell are with being threaded; Body middle part fluting, lock dog is installed in the groove of body, and being recessed at of lock dog and body upwards has two week at least; Had groove by the lock body middle part, the axial section profile of tooth is meshed with lock dog; Release lower cartridge inboard has annular groove, matches with the inclined-plane boss of lock dog; The release sleeve spring places in the annular space of separating between lock barrel and the body path portion upper surface, is placed by in the annular space between lock body bottom and the body bigger diameter end side by the lock body spring; The corresponding positions of separating lock barrel and body is equipped with sealing ring.

Lock dog one side has the sawtooth profile of axial distribution, and opposite side has the inclined-plane boss structure, and corresponding with the contour structure of being conciliate lock barrel by lock body respectively, under the end thrust effect, lock dog can move radially.

When being meshed fully by the sawtooth profile of lock body and lock dog, axially aligned by the by-pass prot on lock body and the body; The boss bottom of separating lock barrel has by-pass prot to communicate with annular space.

A kind of down-hole remote control locking method, contain following steps:

When normally creeping into, mechanism is in release conditions, when needs lock, increase work discharge capacity is to controlling discharge capacity, descending by the lock body spring in the differential pressure action lower compression by lock body, until contacted with the step surface of upper shell by the step surface of lock body upper end, alignd with the by-pass prot of body by the by-pass prot of lock body this moment, drilling fluid flows into the annular space of release upper cartridge by by-pass prot, under the effect of inside and outside annulus pressure, release sleeve compresses release sleeve spring is descending, and the boss of lock dog breaks away from groove under the end thrust of separating lock barrel, move to mechanism's center position, and be meshed by the zigzag groove of lock body; At this moment, revert to the normal operation discharge capacity, still be subjected to inside and outside annulus pressure effect owing to separate lock barrel, although pressure reduction reduces when controlling discharge capacity, but still exist larger pressure reduction to guarantee that the solution lock barrel can not be repositioned to mechanism's release conditions, so the radial motion of lock dog is defined, this moment, mechanism still was in lockup state;

When needs discharge, termination of pumping, the pressure reduction of separating the lock barrel upper and lower end face has not existed, and is up under the restoring force effect of release sleeve spring, contact with the step surface of upper shell until separate the lock barrel upper surface, the annular groove that separate lock barrel this moment is axially corresponding with the boss of lock dog; Simultaneously, be subjected to the restoring force effect that made progress by the lock body spring by lock body during termination of pumping, at lock dog and under by the inclined-plane contact action of lock body, the trend of the oriented body movement outside of lock dog, when the boss of the annular groove of separating lock barrel and lock dog axially at once, lock dog radially outward moves, and boss is combined with groove, and mechanism finishes release movement.

The utility model has the advantages that providing a kind of can be widely used in downhole tool, can by the mode of ground remote control, realize repeatedly locking and the release of parts.When normally creeping into, mechanism is in release conditions; When needs lock, increase the work discharge capacity to controlling discharge capacity, trigger mechanism moves, the normal discharge capacity of recovery after action is finished, lockable mechanism is in lockup state, when needs discharge, termination of pumping, mechanism finishes release movement.

Description of drawings

When considered in conjunction with the accompanying drawings, by the following detailed description of reference, can more completely understand better the utility model and learn easily wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, consist of a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model, such as figure wherein:

Fig. 1 is the overall structure schematic diagram of the utility model when lockup state.

Fig. 2 is the overall structure schematic diagram of the utility model when release conditions.

Below in conjunction with drawings and Examples the utility model is further specified.

The specific embodiment

Obviously, the many modifications and variations done based on aim of the present utility model of those skilled in the art belong to protection domain of the present utility model.

Embodiment 1: as shown in Figure 1 and Figure 2,

Down-hole remote-controlled lock locking apparatus is by upper shell 1, by lock body 2, release sleeve spring 3, separate lock barrel 4, lock dog 5, body 6, formed by lock body spring 7.Body 6, conciliate on the lock barrels 4 by lock body 2 and to be had by-pass prot.Be installed on body 6 inboards by lock body 2, separate the outside that lock barrel 4 is installed on body 6, body 6 is threaded with upper shell 1 usefulness.Body 6 middle parts fluting, lock dog 5 is installed in the groove of body 6, and lock dog 5 upwards has two week at least with being recessed at of body 6.Had groove by lock body 2 middle parts, the axial section profile of tooth is meshed with lock dog 5, and axially the number of teeth is many, and the end thrust that then is distributed on each tooth is little, helps to improve intensity.Separate lock barrel 4 lower inside and have annular groove, match with the inclined-plane boss of lock dog 5.Release sleeve spring 3 places in the annular space of separating between lock barrel 4 and the body 6 path portion upper surfaces, is placed by in the annular space between lock body 2 bottoms and the body 6 bigger diameter end sides by lock body spring 7.Separate lock barrel 4 and be connected sealing ring with the relevant position of body 6.

Down-hole remote control locking method, contain following steps:

When normally creeping into, mechanism is in release conditions, when needs lock, increase work discharge capacity is to controlling discharge capacity, descending by lock body spring 7 in the differential pressure action lower compression by lock body 2, until contacted with the step surface of upper shell by the step surface of lock body 2 upper ends, alignd with the by-pass prot of body 6 by the by-pass prot of lock body 2 this moment, drilling fluid flows into the annular space of separating lock barrel 4 tops by by-pass prot, under the effect of inside and outside annulus pressure, it is descending to separate lock barrel 4 compression release sleeve springs 3, and the boss of lock dog 5 breaks away from groove under the end thrust of separating lock barrel 4, move to mechanism's center position, and be meshed by the zigzag groove of lock body 2; At this moment, revert to the normal operation discharge capacity, still be subjected to inside and outside annulus pressure effect owing to separate lock barrel, although pressure reduction reduces when controlling discharge capacity, but still exist larger pressure reduction to guarantee that solution lock barrel 4 can not be repositioned to mechanism's release conditions, so the radial motion of lock dog 5 is defined, this moment, mechanism still was in lockup state;

When needs discharge, termination of pumping, the pressure reduction of separating lock barrel 4 upper and lower end faces has not existed, and is up under the restoring force effect of release sleeve spring 3, contact with the step surface of upper shell 1 until separate lock barrel 4 upper surfaces, the annular groove that separate lock barrel 4 this moment is axially corresponding with the boss of lock dog 5; Simultaneously, be subjected to the restoring force effect that made progress by lock body spring 7 by lock body 2 during termination of pumping, at lock dog 5 and under by the inclined-plane contact action of lock body 2, the trend of lock dog 5 oriented body 6 movement outside, when the boss of the annular groove of separating lock barrel 4 and lock dog 5 axially at once, lock dog 5 radially outward moves, and boss is combined with groove, and mechanism finishes release movement.

Embodiment 2: as shown in Figure 1 and Figure 2,

On body middle part and lower stage terrace, place respectively by the lock body spring and conciliate the lock barrel spring, lock dog is installed in the through hole of body, install to separate lock barrel in body exterior, upper shell is threaded with this body and function, at last will be by the lock body body interior of packing into from top to bottom.

When normally creeping into, mechanism is in release conditions, when needs lock, increases the work discharge capacity to controlling discharge capacity, is alignd with the by-pass prot of body by lock body, and the solution lock barrel is descending under the effect of inside and outside annulus pressure, lock dog be meshed by the cannelure of lock body.At this moment, revert to the normal operation discharge capacity, mechanism still is in lockup state.

When needs discharge, termination of pumping, it is up under the restoring force effect of release sleeve spring to separate lock barrel, and its annular groove is axially corresponding with the boss of lock dog.Be subjected to the restoring force effect that made progress by the lock body spring by lock body, when the boss of the annular groove of separating lock barrel and lock dog axially at once, lock dog radially outward moves, boss is combined with groove, mechanism finishes release movement.

As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection domain of the present utility model.

Claims

1. remote-controlled lock locking apparatus in down-hole is characterized in that, by upper shell, by lock body, release sleeve spring, separate lock barrel, lock dog, body, formed by the lock body spring; Body, conciliate on the lock barrel by lock body and to be had by-pass prot; Be installed on the body inboard by lock body, separate the outside that lock barrel is installed on body, body and upper shell are with being threaded; Body middle part fluting, lock dog is installed in the groove of body, and being recessed at of lock dog and body upwards has two week at least; Had groove by the lock body middle part, the axial section profile of tooth is meshed with lock dog; Release lower cartridge inboard has annular groove, matches with the inclined-plane boss of lock dog; The release sleeve spring places in the annular space of separating between lock barrel and the body path portion upper surface, is placed by in the annular space between lock body bottom and the body bigger diameter end side by the lock body spring; The corresponding positions of separating lock barrel and body is equipped with sealing ring.

2. down-hole according to claim 1 remote-controlled lock locking apparatus, it is characterized in that: lock dog one side has the sawtooth profile of axial distribution, and opposite side has the inclined-plane boss structure, and is corresponding with the contour structure of being conciliate lock barrel by lock body respectively, under the end thrust effect, lock dog can move radially.

3. down-hole according to claim 2 remote-controlled lock locking apparatus is characterized in that: when being meshed fully by the sawtooth profile of lock body and lock dog, axially aligned by the by-pass prot on lock body and the body; The boss bottom of separating lock barrel has by-pass prot to communicate with annular space.