CN105239962B - With brill with hydraulic control device under kill-job - Google Patents
With brill with hydraulic control device under kill-job Download PDFInfo
- Publication number
- CN105239962B CN105239962B CN201510593806.0A CN201510593806A CN105239962B CN 105239962 B CN105239962 B CN 105239962B CN 201510593806 A CN201510593806 A CN 201510593806A CN 105239962 B CN105239962 B CN 105239962B
- Authority
- CN
- China
- Prior art keywords
- outer barrel
- face
- inner cylinder
- tooth
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
One kind is with brill with hydraulic control device under kill-job.Main purpose is to provide a kind of downhole hardware, the problem of needing to change tubing string when can be solved using the device and be carried out drilling well and pressure break at present, it is possible to achieve pressure break is carried out while drilling well.It is characterized in that：The device is made up of several parts such as outer barrel top, outer barrel bottom, inner cylinder, ball-and-seat closure member and springs；Wherein, with teeth and neck is all designed at the top of part under the bottom of part and outer barrel on outer barrel, and the tooth being engaged is designed with the outer wall of inner cylinder and inwall, there is pod apertures at upper end, and ball-and-seat closure member is arranged in the middle part of inner cylinder end face；Wherein inner cylinder and spring are arranged in outer barrel, and two parts are connected through a screw thread above and below outer barrel.The device connects inflatable packer and sanding machine, can realize connection and closure in drilling rod by controlling controlling flow direction, and then realize drilling well and the conversion of pressure break.
Description
Technical field：
The present invention relates to a kind of underground equipment being applied in Oil-Gas Field Development Engineering field.
Background technology：
With the consumption of the energy, the exploitation of unconventionaloil pool is increasingly paid attention to.In unconventionaloil pool development process, it is
Raising yield can bore multilateral well or implement hydraulic fracturing after drilling well terminates.Although production can be improved by boring multilateral well
Amount, but effect is limited.In order to further improve the development degree of oil gas, Multilateral Wells can be implemented with hydraulic fracturing, but technology at present
It is difficult to which fracturing string is transferred in Multilateral Wells, therefore there is technical difficulty to Multilateral Wells pressure break.If after being terminated using drilling well
Implementing hydraulic fracturing then needs to be replaced with fracturing string after the drill string of underground is all proposed, but the process for changing tubing string can disappear
Substantial amounts of time and manpower and materials are consumed, the efficiency of exploitation is had a strong impact on.Can be with if it can carry out pressure break while drilling well
Solving Multilateral Wells pressure break and can not change tubing string the problem of waste time and energy.
The content of the invention：
In order to solve the technical problem being previously mentioned in background technology, the present invention provides one kind with brill with hydraulic control under kill-job
Device, this kind is simple in construction with hydraulic control device under kill-job with boring, and designs ingenious, it is easy to dismounting and installation, can pass through control
Controlling flow direction realizes connection and closure in drilling rod, and then realizes drilling well and the conversion of pressure break.
The technical scheme is that：This kind is with brill with hydraulic control device under kill-job, including outer barrel top, outer barrel
Portion, inner cylinder, ball-and-seat closure member and spring, it is characterised in that：
Outer barrel top has internal cavities and is provided with outer barrel outlet, and the internal cavities intersect at outer barrel with outer barrel outlet and gone out
Mouth end；The inwall of the internal cavities is provided with deep trouth and shallow slot, is in outer tube inner wall tooth, outer barrel between deep trouth and shallow slot
Parietal tooth has outer tube inner wall increment face, and outer tube inner wall increment face is smooth bevel；It is used for and institute in the bottom on the outer barrel top
State the junction that outer barrel bottom is connected and be provided with internal thread；
Outer barrel bottom is also to have outer barrel lower teeth, outer barrel lower teeth on the inside of hollow cylinder, the bottom of the outer barrel bottom
Tooth wall and the outer barrel bottom madial wall between form outer barrel lower channel, the groove width of the outer barrel lower channel and the width of spring
Degree matches to realize the installation to the spring；Outer barrel lower teeth has outer barrel lower teeth end face, and outer barrel lower teeth end face is
Smooth bevel；The junction for being used to be connected with the outer barrel top on the top of the outer barrel bottom is provided with external screw thread；
Inner cylinder had and closed between the different hollow cavity of upper and lower two diameters, upper and lower two hollow cavities by ball-and-seat
Closing member mounting hole separates, and around the ball-and-seat closure member mounting hole is provided with several pod apertures；The outer wall bottom of the inner cylinder
End is provided with inner tank theca tooth, and inner tank theca tooth has inner tank theca increment face, and inner tank theca increment face is smooth bevel, described interior
The inwall bottom of cylinder is provided with inner cylinder end-tooth, with inner cylinder end-tooth end face, and inner cylinder end-tooth end face is smooth bevel；Inner cylinder
Upper hollow cavity has inner cylinder exit end face；
Wherein, the inner tank theca tooth is meshed with outer tube inner wall tooth, so that in inner tank theca increment face and outer barrel
Can occur relative slip under pressure effect at one end between the end face of parietal tooth end face, to realize rotation of the inner cylinder in outer barrel top
Turn；The inner cylinder end-tooth is meshed with outer barrel lower teeth so that outer barrel lower teeth end face and inner cylinder end-tooth end face it
Between can pressure effect at one end it is lower occur it is relative slide, to realize rotation of the inner cylinder in outer barrel bottom；
The ball-and-seat closure member is made up of ball-and-seat lower surface and ball-and-seat upper end face and cylinder rod；Wherein single current
Valve lower surface is engaged with inner cylinder exit end face, for setting the end face；Ball-and-seat upper end face is engaged with outer barrel exit end face,
For setting the end face；
Outer barrel top, outer barrel bottom, inner cylinder, ball-and-seat closure member and spring are connected as follows, and ball-and-seat is closed
Closing member is arranged in the ball-and-seat closure member mounting hole on inner cylinder and can be freely movable wherein, and inner tube installation is on outer barrel top
Interior, inner tank theca tooth can enter in deep trouth or shallow slot, and when inner tank theca tooth replaces between deep trouth and shallow slot, inner cylinder can revolve
Turn, spring is placed in outer barrel lower channel；Outer barrel top is closely coupled by screw thread with outer barrel bottom, and the end face of inner cylinder is by spring
It is compressed in outer barrel lower channel.
The present invention has the advantages that：The present apparatus can be threadedly attached on drilling rod, without extensive to drilling rod
Transformation, only need to connect sanding machine and inflatable packer on drilling rod in use, convenient and practical；The present apparatus can pass through
Control controlling flow direction realizes connection and closure in drilling rod, only needs to control the mobility status of liquid can when in use on ground
So that inner cylinder rotating, and then realize the switch of valve.When valve is in opening, liquid can be by pod apertures in drilling rod
Inner-outer circulation, can normally drilling well, when valve is closed, do not connected inside drilling rod, can be built the pressure in drilling rod makes envelope
Set every device, sanding machine is opened, pressure break is implemented to stratum.Drilling well and pressure break are dexterously combined together by the present apparatus, thus
It can realize that drilling fracturing uses a set of tubing string, solves the problem of frequently changing tubing string and multilateral well pressure break with boring with pressure,
The time of drilling equipment and fracturing unit resettlement has been saved, the cost of exploitation oil gas is reduced.
Brief description of the drawings：
Fig. 1 is the three dimensional structure diagram of the present invention.
Fig. 2 is the section of structure of the present invention.
Fig. 3 is the tomograph of inner cylinder of the present invention.
Fig. 4 is the section of structure of inner cylinder of the present invention.
Fig. 5 is the tomograph under another visual angle of Fig. 3.
Fig. 6 is the tomograph on outer barrel top of the present invention.
Fig. 7 is the tomograph of ball-and-seat closure member of the present invention.
Fig. 8 is the tomograph of outer barrel bottom of the present invention.
1- outer barrels top in figure, 2- outer barrels bottom, 3- inner cylinders, 4- ball-and-seat closure members, 5- ball-and-seat upper ends face, 6- bullets
Spring, 7- inner tank theca teeth, 8- outer wall increments face, 9- outer barrels outlet, 10- outer barrel exit end faces, 11- deep trouths, 12- shallow slots, 13- is led
Discharge orifice, 14- ball-and-seat closure member mounting holes, 15- inner cylinder end-tooths, 16- outer barrel lower teeths, 17- outer barrel lower channels, 18- inner cylinders
End-tooth end face, 19- inner cylinder exit end faces, 20- outer tube inner wall teeth, 21- ball-and-seats lower surface, 22- outer barrel lower teeth end faces,
23- outer tube inner wall increments face.
Embodiment：
The invention will be further described below in conjunction with the accompanying drawings：
The present apparatus coordinates miscellaneous part when working, i.e., used after being connected together with drill string, sanding machine, packer.On outer barrel
Portion 1 is threadedly attached on the drill string of nearly drill bit, and outer barrel top 1 is connected by screw thread with outer barrel bottom 2, outer barrel bottom 2
It is connected after being connected through a screw thread one section of drill string with sanding machine, sanding machine other end connection packer, the packer other end is connected to
On subaerial drill string.The present apparatus is connected on drill string by above-mentioned annexation.
As shown in figure 1, this kind with bore with hydraulic control device under kill-job, including：Outer barrel top 1, outer barrel bottom 2, inner cylinder
3rd, ball-and-seat closure member 4 and spring 6, it is unique in that：As shown in Fig. 6 combinations Fig. 1, Fig. 2, the outer barrel top 1 is
Hollow cylinder, outer barrel top 1 has outer barrel to export 9 and cavity, and both are intersected at outer barrel exit end face 10；The inwall of cavity has
Deep trouth 11 and shallow slot 12；There are outer tube inner wall tooth 20 and outer tube inner wall increment face 23 between deep trouth 11 and shallow slot 12；Outer barrel top 1 with
There is screw thread the junction of outer barrel bottom 2；
As shown in Fig. 8 combinations Fig. 1, Fig. 2, the outer barrel bottom 2 is by outer barrel lower teeth end face 22, outer barrel lower channel 17 and sky
Chamber is constituted；Wherein outer barrel lower channel installs spring 6；There is screw thread outer barrel bottom 2 with the junction of outer barrel top 1；
If Fig. 3,4,5 are with reference to shown in Fig. 1, Fig. 2, the inner cylinder 3 is made up of two hollow cylinders up and down；Hollow cylinder
Junction have several pod apertures 13, there is ball-and-seat closure member mounting hole 14 centre；Inner tank theca has inner tank theca tooth 7；It is interior
Cylinder inwall has inner cylinder end-tooth 15；The inner tank theca tooth 7 is meshed with outer tube inner wall tooth 20, due to inner tank theca increment face 8
Smooth bevel is with outer tube inner wall increment face 23, relative slip occurs for the lower two increment faces of pressure effect at one end, so as to realize
Inner cylinder 3 rotates in outer barrel top 1；The inner cylinder end-tooth 15 is meshed with outer barrel lower teeth 16, due to inner cylinder end face increment
Face 18 is smooth bevel with outer barrel lower teeth end face 22, and the lower two increment faces of pressure effect at one end occur to slide relatively, so that
Realize that inner cylinder 3 rotates in outer barrel bottom 2；
As shown in Fig. 7 combinations Fig. 1, Fig. 2, the ball-and-seat closure member 4 is by ball-and-seat lower surface 21 and ball-and-seat upper end face 5
And cylinder rod is constituted；Wherein method ball-and-seat lower surface 21 sets inner cylinder exit end face 19, and ball-and-seat upper end face 5 sets outer barrel
Exit end face 10.
The annexation of above-mentioned each component is：Ball-and-seat closure member 4 is arranged on the ball-and-seat closure member mounting hole on inner cylinder 3
In 14 and can wherein freely activity, inner cylinder 3 be arranged on outer barrel top 1 in, inner tank theca tooth 7 can enter deep trouth 11 or shallow
Groove 12, when inner tank theca tooth 7 replaces between deep trouth 11 and shallow slot 12, inner cylinder 3 can rotate, and spring 6 is placed in outer barrel bottom
In groove 17, because outer barrel top 1 is closely coupled by screw thread with outer barrel bottom 2, the end face of inner cylinder 3 can compress spring 6 outside
In cylinder lower channel 17, while inner cylinder end-tooth 15 is intermeshed with outer barrel lower teeth 16.
The present apparatus constitutes a switch by liquid flow direction control valve.Inner tank theca tooth 7 is in shallow slot 12,
Ball-and-seat upper end face 5 can not set outer barrel exit end face 10, liquid can forward direction pass through；Liquid reverse flow, ball-and-seat bottom end
Face 21 sets inner cylinder exit end face 19, promotes inner cylinder movement, and inner cylinder end-tooth 15 contacts outer barrel lower teeth 16, and inner cylinder 3 revolves
Turn；Liquid forward flow, ball-and-seat closure member 4 is opened, and spring 6 promotes inner cylinder 3 to move, the contact outer tube inner wall of inner tank theca tooth 7
Tooth 20 enters deep trouth 11, and ball-and-seat upper end face 5 sets outer barrel exit end face 10, and liquid can not pass through；Liquid reverse flow, single current
Valve lower end surface 21 sets inner cylinder exit end face 19, promotes inner cylinder movement, the contact outer barrel of inner cylinder end-tooth 15 lower teeth 16, inner cylinder
3 rotate；Liquid forward flow, ball-and-seat closure member 4 is opened, and spring 6 promotes inner cylinder 3 to move, and inner tank theca tooth 7 contacts outer
Parietal tooth 20 enters shallow slot 12 in cylinder, and ball-and-seat upper end face 5 can not set outer barrel exit end face 10, and liquid can pass through.
When inner tank theca tooth is in shallow slot, drilling fluid is normal through drilling well is normally carried out；After reacting cycle injection liquid just
Circulating liquid, closes with hydraulic control device central passage under kill-job with boring, is pumped into higher pressure packer setting, sanding machine
Open, pressure break can be carried out to stratum；Direct circulation liquid after reacting cycle injection liquid, with brill with hydraulic control device center under kill-job
Passage is opened, and drilling fluid can be with normal circulation, normal drilling.
The work process of the present apparatus is as follows：
One section of drill string is connected after drill bit and then the present apparatus is connected, connected successively again after one section of drill string of reconnection after the present apparatus
Connect sanding machine and inflatable packer.
In normal drilling process, inner tank theca tooth 7 is stuck in shallow slot 12, and liquid by pod apertures 13 and can push single current open
Valve closure member 4, now ball-and-seat upper end face 5 do not set at outer barrel exit end face 10, liquid can pass through outer barrel outlet 9 flow direction bore
Head；When needing to target zone pressure break, ground reacting cycle injects liquid, the pressure effect of liquid to the annular space of drill string and pit shaft
On ball-and-seat upper end face 5 and promote ball-and-seat closure member 4 movement until ball-and-seat closure member 4 set in inner cylinder exit end face 19
On, liquid cannot be back through now fluid pressure is just acted on inner cylinder 3, and promotes inner cylinder 3 to move compression spring 6, directly
It is intermeshed to inner cylinder end-tooth 15 with outer barrel lower teeth 16, inner cylinder is rotated, then ground direct circulation is injected into drill string
Liquid, inner cylinder 3 is moved in the presence of liquid thrust and the elastic force of spring 6, until inner tank theca tooth 7 is mutually nibbled with outer tube inner wall tooth 20
Close, inner cylinder 3 is rotated, and inner tank theca tooth 7 is stuck in deep trouth 11, and now ball-and-seat upper end face 5 sets outer barrel exit end face 10
Place, liquid can not be pumped into higher pressure sanding machine and be opened over the ground by outer barrel outlet 9, ground pump-in pressure, packer setting
Layer carries out pressure break.Repeatable aforesaid operations when needing to continue to creep into, make inner tank theca tooth 7 be in shallow slot 12, liquid can pass through
Outer barrel outlet 9 flows to drill bit.
Claims (1)
1. one kind is with brill with hydraulic control device under kill-job, including outer barrel top (1), outer barrel bottom (2), inner cylinder (3), ball-and-seat
Closure member (4) and spring (6), it is characterised in that：
Outer barrel top (1) has internal cavities and is provided with outer barrel outlet (9), and the internal cavities are intersected at outer barrel outlet (9)
Outer barrel exit end face (10) place；The inwall of the internal cavities is provided with deep trouth (11) and shallow slot (12), in deep trouth (11) and shallow slot
(12) it is outer tube inner wall tooth (20) between, outer tube inner wall tooth (20) has outer tube inner wall increment face (23), outer tube inner wall increment face
(23) it is smooth bevel；The junction for being used to be connected with the outer barrel bottom in the bottom on the outer barrel top is provided with interior spiral shell
Line；
Outer barrel bottom (2) is also to have outer barrel lower teeth (16), outer barrel bottom on the inside of hollow cylinder, the bottom of the outer barrel bottom
Outer barrel lower channel (17), the groove width of the outer barrel lower channel are formed between the tooth wall of tooth (16) and the madial wall of the outer barrel bottom
Match to realize the installation to the spring with the width of spring (6)；Outer barrel lower teeth (16) has outer barrel lower teeth end face
(22), outer barrel lower teeth end face (22) is smooth bevel；It is used to be connected with the outer barrel top on the top of the outer barrel bottom
The junction connect is provided with external screw thread；
Inner cylinder (3) had and closed between the different hollow cavity of upper and lower two diameters, upper and lower two hollow cavities by ball-and-seat
Closing member mounting hole (14) separates, and around the ball-and-seat closure member mounting hole is provided with several pod apertures (13)；The inner cylinder
Outer wall bottom be provided with inner tank theca tooth (7), inner tank theca tooth (7) has inner tank theca increment face (8), inner tank theca increment face
(8) it is smooth bevel, the inwall bottom of the inner cylinder is provided with inner cylinder end-tooth (15), interior with inner cylinder end-tooth end face (18)
Cylinder end-tooth end face (18) is smooth bevel；The upper hollow cavity of inner cylinder (3) has inner cylinder exit end face (19)；
Wherein, the inner tank theca tooth (7) is meshed with outer tube inner wall tooth (20) so that inner tank theca increment face (8) with
Can occur relative slip under pressure effect at one end between the end face in outer tube inner wall increment face (23), to realize that inner cylinder (3) exists
Rotation in outer barrel top (1)；The inner cylinder end-tooth (15) is meshed with outer barrel lower teeth (16), so that outer barrel bottom
Can occur relative slip under pressure effect at one end between increment face (22) and inner cylinder end-tooth end face (18), to realize inner cylinder
(3) rotation in outer barrel bottom (2)；
The ball-and-seat closure member (4) is made up of ball-and-seat lower surface (21) and ball-and-seat upper end face (5) and cylinder rod；Its
Middle ball-and-seat lower surface (21) is engaged with inner cylinder exit end face (19), for setting the end face；Ball-and-seat upper end face (5) with it is outer
Cylinder exit end face (10) is engaged, for setting the end face；
Outer barrel top (1), outer barrel bottom (2), inner cylinder (3), ball-and-seat closure member (4) and spring (6) connect as follows
Connect, ball-and-seat closure member (4) is in the ball-and-seat closure member mounting hole (14) on inner cylinder (3) and can freely live wherein
Dynamic, inner cylinder (3) is arranged in outer barrel top (1), and inner tank theca tooth (7) can enter in deep trouth (11) or shallow slot (12), inner cylinder
When outer parietal tooth (7) replaces between deep trouth (11) and shallow slot (12), inner cylinder (3) can rotate, and spring (6) is placed in outer barrel bottom
In groove (17)；Outer barrel top (1) and outer barrel bottom (2) are closely coupled by screw thread, and the end face of inner cylinder (3) compresses spring (6)
In outer barrel lower channel (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593806.0A CN105239962B (en) | 2015-09-17 | 2015-09-17 | With brill with hydraulic control device under kill-job |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593806.0A CN105239962B (en) | 2015-09-17 | 2015-09-17 | With brill with hydraulic control device under kill-job |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105239962A CN105239962A (en) | 2016-01-13 |
| CN105239962B true CN105239962B (en) | 2017-07-14 |
Family
ID=55037756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510593806.0A Active CN105239962B (en) | 2015-09-17 | 2015-09-17 | With brill with hydraulic control device under kill-job |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105239962B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9683424B2 (en) | 2015-02-06 | 2017-06-20 | Comitt Well Solutions Us Holding Inc. | Apparatus for injecting a fluid into a geological formation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202266240U (en) * | 2011-08-17 | 2012-06-06 | 宝鸡瑞林石油机电设备有限责任公司 | Underground differential-pressure repeated circulation valve device |
| CN103291263A (en) * | 2013-05-24 | 2013-09-11 | 贵州航天凯山石油仪器有限公司 | Method and device for hollow water-distribution flow adjusting |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201022004D0 (en) * | 2010-12-24 | 2011-02-02 | Managed Pressure Operations | Drill pipe |
| US8555988B2 (en) * | 2011-01-06 | 2013-10-15 | Halliburton Energy Services, Inc. | Low equivalent circulation density setting tool |
| NO337583B1 (en) * | 2011-09-05 | 2016-05-09 | Interwell As | Fluid-activated circulating valve |
-
2015
- 2015-09-17 CN CN201510593806.0A patent/CN105239962B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202266240U (en) * | 2011-08-17 | 2012-06-06 | 宝鸡瑞林石油机电设备有限责任公司 | Underground differential-pressure repeated circulation valve device |
| CN103291263A (en) * | 2013-05-24 | 2013-09-11 | 贵州航天凯山石油仪器有限公司 | Method and device for hollow water-distribution flow adjusting |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
Non-Patent Citations (1)
| Title |
|---|
| 井下液控换向阀的设计与应用研究;朱朝发;《中国优秀硕士学位论文全文数据库 基础科学辑》;20141015(第10期);第4-22页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105239962A (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277079B (en) | A kind of tubing string of horizontal well fracturing completion and pressing crack construction method thereof | |
| CN103277078B (en) | A kind of hydraulic sliding sleeve | |
| CN205047207U (en) | Colliery binary channels segmentation in pit hydraulic fracturing device | |
| CN106837172B (en) | A kind of radial well solves the boring method of thin interbed | |
| CN109798097B (en) | Unlimited-use fracturing sand blower | |
| CN205063929U (en) | Colliery is sealed in pit and is pressed integration segmentation hydraulic fracturing device | |
| CN107044276B (en) | Novel intelligence well cementation sliding sleeve | |
| CN109236189A (en) | A kind of downhole drill reamer | |
| CN201908639U (en) | Valving claw locking ball injection type sand blasting sliding sleeve for horizontal well fracturing | |
| CN105888639A (en) | Feeding-controlling full-bore sliding sleeve sectional fracturing tube column | |
| CN103573214B (en) | A kind of Operating Pressure circulation bottom valve | |
| CN115217458A (en) | Integrated device for fracturing and propping agent injection in mine and construction method | |
| CN107023259B (en) | A kind of well system based on double-wall drill pipe | |
| CN104196492B (en) | A kind of dragging down-hole plugging valve with pressure | |
| CN204371173U (en) | A kind of anchor | |
| CN106703728B (en) | The two-way displacement apparatus of reciprocating rotary | |
| CN103306645A (en) | Once drilling fracturing completion pipe string of horizontal well and drilling fracturing completion technology | |
| CN104100249B (en) | Do not limit the sliding sleeve of bushing of hop count pressure break | |
| CN105239962B (en) | With brill with hydraulic control device under kill-job | |
| CN206035458U (en) | Clear hole of hydraulic jet pierces through device | |
| CN205977171U (en) | Rotatory cementing -head of side joint | |
| CN203239310U (en) | Unlimited-section fracture casing pipe sliding sleeve | |
| CN104747434A (en) | Screw pump equipment for exploiting coal bed gas | |
| CN103437742A (en) | Sand-replenishing tool for rapidly opening and closing filling channel | |
| CN217151901U (en) | Coal seam open hole staged fracturing throttleer and staged fracturing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |