CN203729977U - Emergency safety release device for measurement-while-drilling instruments - Google Patents
Emergency safety release device for measurement-while-drilling instruments Download PDFInfo
- Publication number
- CN203729977U CN203729977U CN201420102331.1U CN201420102331U CN203729977U CN 203729977 U CN203729977 U CN 203729977U CN 201420102331 U CN201420102331 U CN 201420102331U CN 203729977 U CN203729977 U CN 203729977U
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- China
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- housing
- lower contact
- mandrel
- measurement
- spline body
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Abstract
The utility model discloses an emergency safety release device for measurement-while-drilling instruments. The emergency safety release device for measurement-while-drilling instruments comprises a housing and a lower connector. The inner wall of the housing is provided with a serrated wide internal thread; the outer wall of the lower connector is provided with a serrated wide external thread. The lower connector is connected to the serrated width internal thread of the housing through the serrated wide external thread in a fastened manner. Fastening or unfastening is achieved by relatively positively or reversely rotating the housing and the lower connector. A locking device for preventing the lower connector from automatically loosening from the housing is further mounted in the housing. When a downhole bottom drill (a power drill or bit) jams and a geosteering instrument needs to be pulled out, the drill and the instrument above a male connector can be pulled out easily by unfastening the connection threads; both downhole unfastening and fastening are easy and reliable. During normal drilling, the emergency safety release device serves as a downhole tool and is high in operation reliability; the inside and outside diameters of the emergency safety release device are equal to the diameter of a string connected with the device, so that the emergency safety release device can be operated in a water nozzle of the string with no influence.
Description
Technical field
The utility model relates to the aid for geosteering instrument, specifically the emergent safe releasing device of a kind of measurement while-drilling instrument.
Background technology
Geosteering instrument FEWD/LWD is a kind of important tool of horizontal well drilling, it provides important evidence for geologist judges stratum and oil reservoir feature, in recent years because the construction of horizontal well is more and more, geosteering instrument FEWD/LWD is bringing into play more and more important effect, but because horizontal well construction difficulty is large, risk is high, there is once in a while the down hole problems such as bit freezing, part well is because hole condition is complicated, salvaging difficulty is large, the salvaging engineering time is long, lose larger, cause part geology guide instrument FEWD/LWD to fall situation that well cannot salvage, and geosteering instrument FEWD/LWD expensive (domestic 8,000,000, import 1,600 ten thousand), the bit freezing of part well occurs in power drilling tool and above drill bit.So need a kind of instrument that solves problems of exploitation badly, and the present drilling well industry safe releasing device of relevant geology guide instrument also.
Summary of the invention
The purpose of this utility model is to provide the measurement while-drilling instrument safe releasing device of meeting an urgent need, can when there is bit freezing, from instrument bottom, back out smoothly, thereby the safety of saving geosteering instrument from damage, reaches the object that reduces loss and shorten the processing time, has huge economic benefit and social benefit.
In order to reach above-mentioned purpose, the utility model has adopted following technical scheme, the measurement while-drilling instrument safe releasing device of meeting an urgent need, comprise housing, lower contact, described inner walls is offered the wide internal thread of saw shape, described lower contact outer wall is offered the wide external screw thread of saw shape, described lower contact is connected on the wide internal thread of saw shape of housing by the wide external thread rotary button of saw shape, by linking on forward and reverse rotation of housing and lower contact, connect or threaded off mistake even, described enclosure interior is also provided with one and prevents that lower contact automatic trip is buckled in the locking system of housing.
Described locking system mainly comprises mandrel assembly, mandrel assembly comprises mandrel, spline body, piston, in the front end outside of mandrel, cover has piston, piston can stretch into or extract out the inner chamber in lower contact with mandrel, and piston outer wall and lower contact inner chamber are sealing state, be positioned at piston rear for spline body, spline body is enclosed within on mandrel equally, at enclosure interior inwall, offer axial chute, described chute is consistent with the shape of spline body, guarantee that spline physical efficiency moves axially in chute, described lower contact upper end offers the consistent dental inlay of same chute, guarantee that spline body slides in dental inlay under chute continues, just while and chute and dental inlay engagement of spline body like this, prevent that lower contact automatic rotation from threading off in housing.
After described housing is connected with lower contact, by housing outer wall, along radius to lower contact inner chamber, be drilled with a mud hole, according to mud hole site, processing lower contact upper end dental inlay guarantees spline body simultaneously and chute and dental inlay engagement.
Described spline body upper end arranges a pressure cap being enclosed within equally on mandrel, and pressure cap makes spline body fixing on mandrel.
The upper end of described pressure cap is provided with a spring, and the upper end of spring withstands on the annulus gear platform of offering mandrel upper end.
The lower end of described spring is also connected with a spring base, yearns on housing, offer a through hole that is used for installing pin in the footpath, position of spring base, and moving axially of described spring base is limited by radially stopping of pin.
Compared to prior art, the utlity model has following beneficial effect:
With boring the emergent safe releasing device of geosteering instrument (FEWD/LWD), it is a kind of emergent safe releasing device being connected between power drilling tool and geosteering instrument.When bit freezing occurs in power drilling tool and above drill bit, this instrument can be backed out from instrument bottom smoothly when there is bit freezing, thereby the safety of saving geosteering instrument from damage reaches the object that reduces loss and shorten the processing time.At down-hole back-off or make-up is all very easily and reliable again.Drill string is in normal work, and it becomes a drilling tool, and its internal-and external diameter is also consistent with the tubing string being connected, so carry out operation without prejudice in the hydrophthalmia of tubing string.This instrument should meet every requirement of strength such as the tension of instrument in drilling course, antitorque and anti-interior pressure, to meet the object that can back out smoothly when needed simultaneously, bottom of device joint body adopts special wide saw shape thread connection, is designed with tightening structure cleverly.
Male joint top and female joint bottom are tool joint thread, are directly connected with tubing string or instrument, and internal-and external diameter equates with the tubing string being connected, can bear large load as pulling force, torsion, impact force and higher mud circulation pump pressure; In normally creeping into middle instrument, mandrel is subject to annulus pressure effect Compress Spring descending and mesh with wide tooth upper end of joint tooth, to prevent wide toe joint head back-off; When emergent safe releasing device bottom drill bit or centralizer are met card and are difficult to unfreezing, stop mud circulation and apply the pressure of 10-20KN, reversing torque can be opened according to 40～60% operations of torque wrench moment; At down-hole back-off or make-up speed is faster than drilling rod or oil connection again, and the neutrality of looking for of screw thread will be got well.
The utlity model has following advantage: 1, the present invention is simple in structure, do not affect the technical data of normal drilling well.2, the present invention can be in time when down hole problem occurring need to discharge, discharge smoothly, guarantee the safety of upper tool part geosteering instrument.3, the present invention is at down-hole back-off or make-up is all very easily and reliable again.
Accompanying drawing explanation
Fig. 1 is the structural representation of the emergent safe releasing device of measurement while-drilling instrument of the present utility model when engagement;
Fig. 2 is the structural representation of the emergent safe releasing device of measurement while-drilling instrument of the present utility model when throwing off;
Fig. 3 is shell structure figure;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is lower contact structure chart;
Fig. 6 is the B-B sectional view of Fig. 5;
Fig. 7 is axle assembly structure chart;
Fig. 8 is spline body structure figure;
Fig. 9 is the cross-sectional view of the spline body of Fig. 8.
In figure: 1, housing; 2, lower contact; 3, mandrel; 4, spring; 5, spring base; 6 pins; 7, pressure cap; 8, spline body; 9, piston.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, yet accompanying drawing only provides the use of reference with explanation, is not used for the utility model to be limited.
As shown in Fig. 1-9, the measurement while-drilling instrument safe releasing device of meeting an urgent need, comprise housing 1, lower contact 2, described inner walls is offered the wide internal thread of saw shape, described lower contact outer wall is offered the wide external screw thread of saw shape, described lower contact is connected on the wide internal thread of saw shape of housing by the wide external thread rotary button of saw shape, by linking on forward and reverse rotation of housing and lower contact, is connect or is threaded off mistake even, and described enclosure interior is also provided with one and prevents that lower contact automatic trip is buckled in the locking system of housing.Described locking system mainly comprises mandrel assembly, mandrel assembly comprises mandrel 3, spline body 8, piston 9, in the front end outside of mandrel, cover has piston, piston can stretch into or extract out the inner chamber in lower contact with mandrel, and piston outer wall and lower contact inner chamber are sealing state, be positioned at piston rear for spline body, spline body is enclosed within on mandrel equally, at enclosure interior inwall, offer axial chute, described chute is consistent with the shape of spline body, guarantee that spline physical efficiency moves axially in chute, described lower contact upper end offers the consistent dental inlay of same chute, guarantee that spline body slides in dental inlay under chute continues, just while and chute and dental inlay engagement of spline body like this, prevent that lower contact automatic rotation from threading off in housing 1.After described housing is connected with lower contact, by housing outer wall, along radius to lower contact inner chamber, be drilled with a mud hole 21, according to mud hole site, processing lower contact upper end dental inlay guarantees spline body simultaneously and chute and dental inlay engagement.Described spline body upper end arranges a pressure cap 7 being enclosed within equally on mandrel, and pressure cap makes spline body fixing on mandrel.The upper end of described pressure cap is provided with a spring 4, and the upper end of spring withstands on the annulus gear platform of offering mandrel upper end.The lower end of described spring is also connected with a spring base 5, yearns on housing, offer a through hole that is used for installing pin 6 in the footpath, position of spring base, and moving axially of described spring base is limited by radially stopping of pin.
With boring geosteering instrument safe releasing device bottom fitting body, adopt special wide saw shape thread connection, be designed with tightening structure cleverly, during connection, only need apply certain moment of torsion and form a rigid body, when down-hole equipment chance card needs emergency trip, from ground, be greater than and connect moment of torsion more than 40%, and the moment of torsion of opposite direction, can easily thread off; While normally working in down-hole due to this device, there is a locking system, therefore can automatically not thread off.
1, assemble after housing 1, lower contact 2, sludge slurry hole 21, makes it to fix with housing spline position, then dismantles, according to mud hole site, and processing lower contact left end dental inlay, this just guarantees the engagement completely of housing, spline body 8 and lower contact 2 dental inlays.
2, the external splines of spline body 8 can mesh with housing internal spline, lower contact dental inlay simultaneously.
3, in termination of pumping situation, under the effect of spring 4, axle assembly is at high order end, and spline body and lower contact dental inlay are thrown off, and housing 1 can rotate mutually with lower contact 2, because they are AJ type safety joint structures, adds to depress and is easy to move back button.
4, in turn on pump situation, in axle left end, internal pressure drilling tool, press as P1, piston right-hand member pressure is annular pressure P2, due to P1 > P2, axle right lateral, until the dental inlay of the spline of spline body 8 and lower contact 2 meshes completely, now housing 1, spline body 8, lower contact 2 are intermeshing, and housing 1 is circumferentially fixing with lower contact 2, can not mutually rotate, guaranteed that normal drilling process middle shell 1, lower contact 2 can not move back button, guaranteed downhole safety.
With boring the emergent safe releasing device of geosteering instrument (FEWD/LWD), it is a kind of emergent safe releasing device being connected between power drilling tool and geosteering instrument.When well inner bottom part drilling tool (power drilling tool and drill bit) generation bit freezing need to trip out geosteering instrument, can from its body, connect screw thread at an easy rate and open, trip out the above drilling tool of male joint and instrument.At down-hole back-off or make-up is all very easily and reliable again.In normal drilling process, it becomes a downhole tool, and functional reliability is strong, and its internal-and external diameter is also consistent with the tubing string being connected, so carry out operation without prejudice in the hydrophthalmia of tubing string.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (6)
1. the emergent safe releasing device of measurement while-drilling instrument, it is characterized in that, comprise housing, lower contact, described inner walls is offered the wide internal thread of saw shape, described lower contact outer wall is offered the wide external screw thread of saw shape, described lower contact is connected on the wide internal thread of saw shape of housing by the wide external thread rotary button of saw shape, by linking on forward and reverse rotation of housing and lower contact, is connect or is threaded off mistake even, and described enclosure interior is also provided with one and prevents that lower contact automatic trip is buckled in the locking system of housing.
2. the emergent safe releasing device of measurement while-drilling instrument according to claim 1, it is characterized in that, described locking system mainly comprises mandrel assembly, mandrel assembly comprises mandrel, spline body, piston, in the front end outside of mandrel, cover has piston, piston can stretch into or extract out the inner chamber in lower contact with mandrel, and piston outer wall and lower contact inner chamber are sealing state, be positioned at piston rear for spline body, spline body is enclosed within on mandrel equally, at enclosure interior inwall, offer axial chute, described chute is consistent with the shape of spline body, guarantee that spline physical efficiency moves axially in chute, described lower contact upper end offers the consistent dental inlay of same chute, guarantee that spline body slides in dental inlay under chute continues, just while and chute and dental inlay engagement of spline body like this, prevent that lower contact automatic rotation from threading off in housing.
3. the emergent safe releasing device of measurement while-drilling instrument according to claim 2, it is characterized in that, after being connected with lower contact, described housing along radius to lower contact inner chamber, is drilled with a mud hole by housing outer wall, according to mud hole site, processing lower contact upper end dental inlay guarantees spline body simultaneously and chute and dental inlay engagement.
4. the emergent safe releasing device of measurement while-drilling instrument according to claim 2, is characterized in that, described spline body upper end arranges a pressure cap being enclosed within equally on mandrel, and pressure cap makes spline body fixing on mandrel.
5. the emergent safe releasing device of measurement while-drilling instrument according to claim 4, is characterized in that, the upper end of described pressure cap is provided with a spring, and the upper end of spring withstands on the annulus gear platform of offering mandrel upper end.
6. the emergent safe releasing device of measurement while-drilling instrument according to claim 5, it is characterized in that, the lower end of described spring is also connected with a spring base, in the footpath, position of spring base, yearn for and on housing, offer a through hole that is used for installing pin, moving axially of described spring base is limited by radially stopping of pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102331.1U CN203729977U (en) | 2014-03-07 | 2014-03-07 | Emergency safety release device for measurement-while-drilling instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420102331.1U CN203729977U (en) | 2014-03-07 | 2014-03-07 | Emergency safety release device for measurement-while-drilling instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203729977U true CN203729977U (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420102331.1U Expired - Fee Related CN203729977U (en) | 2014-03-07 | 2014-03-07 | Emergency safety release device for measurement-while-drilling instruments |
Country Status (1)
| Country | Link |
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| CN (1) | CN203729977U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895552A (en) * | 2014-03-07 | 2015-09-09 | 中国石油化工集团公司 | Emergency safe release device for apparatus for measurement while drilling |
| CN109538134A (en) * | 2017-09-15 | 2019-03-29 | 刘玉友 | The application method of apparatus for work under a kind of oil well |
| CN111980678A (en) * | 2020-09-15 | 2020-11-24 | 武汉中交岩土工程有限责任公司 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
-
2014
- 2014-03-07 CN CN201420102331.1U patent/CN203729977U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895552A (en) * | 2014-03-07 | 2015-09-09 | 中国石油化工集团公司 | Emergency safe release device for apparatus for measurement while drilling |
| CN104895552B (en) * | 2014-03-07 | 2017-11-14 | 中国石油化工集团公司 | Measurement while-drilling instrument is met an urgent need safe releasing device |
| CN109538134A (en) * | 2017-09-15 | 2019-03-29 | 刘玉友 | The application method of apparatus for work under a kind of oil well |
| CN111980678A (en) * | 2020-09-15 | 2020-11-24 | 武汉中交岩土工程有限责任公司 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151126 Address after: 100029 Beijing Chaoyang District Hui Xin a No. twelve layer 6 Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: Huanghe Well Drilling General Corp., Sinopec Shengli Petroleum Engineering Co., Ltd. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: China Petrochemical Group Corp. Patentee before: Huanghe Well Drilling General Corp., Sinopec Shengli Petroleum Engineering Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20210307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |