CN207795145U - A kind of coal bed gas horizontal well cementing tool - Google Patents
A kind of coal bed gas horizontal well cementing tool Download PDFInfo
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- CN207795145U CN207795145U CN201721836568.2U CN201721836568U CN207795145U CN 207795145 U CN207795145 U CN 207795145U CN 201721836568 U CN201721836568 U CN 201721836568U CN 207795145 U CN207795145 U CN 207795145U
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Abstract
The utility model discloses a kind of coal bed gas horizontal well cementing tools, belong to cementing technology field.In the tool, lifting sub is connect with top connection, and top connection is connect with outer sleeve upper end, and outer sleeve is connect with lower contact, and lower contact is connect with inflatable packer；Central tube is sheathed in outer sleeve, and closing is sheathed between central tube and outer sleeve, is closed obturating plug and is sheathed in central tube by upper shear pin, and central tube, closing set are closed obturating plug by block and are pressed on outer sleeve；Central tube, the circulation canal closed set, be provided with conducting on outer sleeve, open set and are sheathed in central tube by middle shear pin, and closure circulation canal；Central tube, lower contact wall on be provided with the packer feed pathway being connected to the inlet opening of inflatable packer, ball seat is sheathed on by lower shear pin in central tube, and plugging packer feed pathway；Upper shear pin, middle shear pin, lower shear pin shear strength be gradually reduced；Input ball is for blocking ball seat；Shut-off plug closes obturating plug for blocking.
Description
Technical field
The utility model is related to cementing technology field, more particularly to a kind of coal bed gas horizontal well cementing tool.
Background technology
During cbm development, it usually needs carry out half way well cementation to well section more than coal seam, it is seen then that provide a kind of
Cementing tool is very necessary.
In the prior art, entering well casing string structure when half way is cemented the well is：Guide shoe+screen casing string+1-2 roots casing+blind plate+full rubber
Packer+sizing collar+bunch tube.Cement is injected from wellhead casing pipe when well cementation, cement enters the borehole wall and casing annular through sizing collar
Spatially return to 200 meters -250 meters of well depth.It is returned on the cement that sizing collar, external packer of pipe and blind plate are injected with the use of guiding
The borehole wall and casing annulus, have reached casing cementing sealing coal seam upper formation, and sieve tube completion supports coal seam horizontal segment purpose.
After cement is waited and coagulated, needs to bore mill packer, sizing collar and blind plate, be connected to casing annulus and screen casing annular space, form methane and desorb
Enter the Channel Group channel of well head by pit shaft, the final purpose for realizing mining of coal bed gas.
Designer has found that the cementing tool that the prior art provides at least has following technical problem：
In drilling and grinding process, the relatively wammel mill for being easy the residual ring left on the borehole wall and being deposited in net horizontal section screen casing is residual
Block so that lower pump is gone into operation, the well casing string that enters of subsequent job is obstructed, and easily causes construction failure.
Utility model content
A kind of coal bed gas horizontal well cementing tool, the cementing tool include：Lifting sub, top connection, outer sleeve, under connect
Head, central tube, closes set, closes obturating plug, block, opens set, ball seat, input ball, shut-off plug at inflatable packer；
The lower end outer wall of the lifting sub is connect with the top connection, the lower end outer wall of the top connection and the housing
The upper end inner wall connection of cylinder, the lower end inner wall of the outer sleeve are connect with the upper end outer wall of the lower contact, the lower contact
Lower end is connect with the inflatable packer；
The central tube is sheathed on inside the outer sleeve, and the closing is sheathed on the central tube and the outer sleeve
Between, the closing obturating plug is sheathed on by upper shear pin inside the central tube, and the central tube, closing set pass through described
Block is pressed on by the closing obturating plug on the outer sleeve, after the upper shear pin is cut, the closing obturating plug, it is described in
Heart pipe, closing set can move down；
The circulation canal of conducting, the opening set are provided on the central tube, the wall for closing set, the outer sleeve
It is sheathed on by middle shear pin inside the central tube below the closing obturating plug, and blocks the circulation canal；
The central tube, the lower contact wall on be provided with the packing being connected to the inlet opening of the inflatable packer
Device feed pathway, the ball seat are sheathed on by lower shear pin inside the central tube for opening set lower section, and described in closure
Packer feed pathway；
The upper shear pin, the middle shear pin, the lower shear pin shear strength be gradually reduced；
The input ball is for blocking the ball seat；
The shut-off plug is for blocking the closing obturating plug.
In a kind of possible design, top bar, the top bar and the pass are provided on the inner wall of the central tube
There is spacing between the bottom of occlusion seat, for offseting with the bottom for closing obturating plug.
In a kind of possible design, middle step is provided on the inner wall of the central tube, the middle step is beaten with described
Opening has spacing between the bottom of set, for offseting with the bottom for opening set.
In a kind of possible design, there is toroidal cavity, institute between the closing set bottom and lower contact top
The closing set of the toroidal cavity for accommodating downlink is stated, so that on the upper circulation canal of closing set and the outer sleeve
Circulation canal is staggered；
There is spacing between at the top of the center bottom of the tube and the inflatable packer, for accommodate downlink it is described in
Heart pipe, so that the circulation canal on the central tube is staggered with the circulation canal on the outer sleeve.
In a kind of possible design, the central tube, the closing put on the gear hole for being disposed radially corresponding connection；
Gear rank corresponding with the gear hole is provided on the inner wall of the outer sleeve；
The block is flexible block, and the block is compressed in by the closing obturating plug in the gear hole and the gear rank.
In a kind of possible design, be provided in an axial direction on the ball seat major diameter bore that is sequentially connected to from top to bottom and
Path bore；
The internal diameter of the major diameter bore is more than the diameter of the input ball；
The internal diameter of the path bore is less than the diameter of the input ball.
In a kind of possible design, the shut-off plug includes：Block section connected in sequence and guide section from top to bottom；
The guide section is used to stretch to described close in the axially extending bore of obturating plug；
The block section is used to block the axially extending bore for closing obturating plug.
In a kind of possible design, the block section includes：Multiple leather cup bodies connected in sequence from top to bottom.
In a kind of possible design, the lower end outer wall of the lifting sub and the upper end inner thread of the top connection connect
It connects.
In a kind of possible design, the lower end outer wall of the top connection and the upper end inner thread of the outer sleeve connect
It connects；
The lower end inner wall of the outer sleeve is connect with the upper end outer wall thread of the lower contact.
The advantageous effect brought of technical solution that the utility model embodiment provides is：
The coal bed gas horizontal well cementing tool that the utility model embodiment provides, in application, being consolidated this using pipe string structure
The horizontal segment of well tool tripping in coal bed gas well, and inflatable packer is made to be located in coal seam section roof mudstone, it is ensured that well cementation mud
Coal seam will not be entered.First, the input input ball into the cementing tool, makes it block ball seat.It is suppressed into cementing tool, first
So that lower shear pin is cut, at this time ball seat downlink, to expose packer feed pathway, then to fluid injection in cementing tool, make its by
Packer feed pathway enters in the inlet opening of inflatable packer, and inflatable packer is expanded to block the cementing tool and well
Annular space between cylinder.Then, continue to suppress, middle shear pin is made to cut, at this point, opening set downlink to expose circulation canal, to well cementation
Pump priming mud in tool makes it enter in the annular space above inflatable packer through circulation canal.After cementing, to well cementation
Input shut-off plug is continued thereafter with and is suppressed to block closing obturating plug in tool, and shear pin is made to cut, at this point, obturating plug downlink is closed, gear
Block is no longer compacted, and central tube, closing set move down, and the circulation canal of circulation canal and outer sleeve thereon is made to be staggered,
Realize the closing of circulation canal.Hou Ning is after, tripping in fishing tool, and cementing tool is proposed well head, terminates well cementing operation.
As it can be seen that the cementing tool that the utility model embodiment provides fills in (i.e. drilling and grinding operation) when carrying out well cementing operation, without boring, in turn
Avoid due to bore fill in caused by pit shaft be obstructed problem, the half way for being suitable for coal bed gas well net horizontal section is cemented the well.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram for the coal bed gas horizontal well cementing tool that the utility model embodiment provides；
Fig. 2 is the structural schematic diagram for the input ball that the utility model embodiment provides；
Fig. 3 is the structural schematic diagram for the shut-off plug that the utility model embodiment provides.
Reference numeral indicates respectively：
1- lifting subs,
2- top connections,
3- outer sleeves,
4- lower contacts,
5- inflatable packers,
6- central tubes,
7- closes set,
8- closes obturating plug,
9- blocks,
10- opens set,
11- ball seats,
12- puts into ball,
13- shut-off plugs, the block sections 131-, 132- guide sections,
The upper shear pins of 14-,
Shear pin in 15-,
Shear pin under 16-,
17- circulation canals.
Specific implementation mode
Unless otherwise defined, all technical terms used in the utility model embodiment all have and those skilled in the art
Normally understood identical meaning.To keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with attached
Figure is described in further detail the utility model embodiment.
The utility model embodiment provides a kind of coal bed gas horizontal well cementing tool, such as 3 institute of attached drawing 1, attached drawing 2 and attached drawing
Show, which includes：Lifting sub 1, outer sleeve 3, lower contact 4, inflatable packer 5, central tube 6, closes at top connection 2
Set 7 is closed, obturating plug 8, block 9 is closed, opens set 10, ball seat 11, input ball 12, shut-off plug 13.
Wherein, the lower end outer wall of lifting sub 1 is connect with top connection 2, and the lower end outer wall of top connection 2 is upper with outer sleeve 3
Inner wall connection, the lower end inner wall of outer sleeve 3 is held to be connect with the upper end outer wall of lower contact 4, lower end and the expansion type of lower contact 4 insulate
Device 5 connects.
Central tube 6 is sheathed on inside outer sleeve 3, is closed set 7 and is sheathed between central tube 6 and outer sleeve 3, closes obturating plug 8
It is sheathed on inside central tube 6 by upper shear pin 14, central tube 6, closing set 7 are closed obturating plug 8 by block 9 and are pressed on outer sleeve
On 3, after upper shear pin 14 is cut, closing obturating plug 8, central tube 6, closing set 7 can move down.
Central tube 6 closes the circulation canal 17 that conducting is provided on the wall for covering 7, outer sleeve 3, opens during set 10 passes through and cuts
Nail 15 is sheathed on inside the central tube 6 for closing 8 lower section of obturating plug, and blocks the circulation canal 17.
Central tube 6, lower contact 4 wall on to be provided with the packer feed liquor that is connected to the inlet opening of inflatable packer 5 logical
Road, ball seat 11 is sheathed on by lower shear pin 16 inside the central tube 6 for opening 10 lower section of set, and blocks the packer feed pathway.
Upper shear pin 14, middle shear pin 15, lower shear pin 16 shear strength be gradually reduced；Input ball 12 is for blocking ball seat 11；It closes
Occlusion 13 closes obturating plug 8 for blocking.
Below with regard to the utility model embodiment provide coal bed gas horizontal well cementing tool operation principle and its effect to
Give elaboration：
In application, using pipe string structure by the horizontal segment of the cementing tool tripping in coal bed gas well, and make inflatable packer 5
In coal seam section roof mudstone, it is ensured that well cementation mud will not enter coal seam.First, the input input ball into the cementing tool
12, so that it is blocked ball seat 11.It is suppressed into cementing tool, is first cut lower shear pin 16, at this time 11 downlink of ball seat, to expose
Packer feed pathway, then to fluid injection in cementing tool, make its by packer feed pathway enter inflatable packer 5 into
In fluid apertures, inflatable packer 5 is expanded to block the annular space between the cementing tool and pit shaft.Then, continue to suppress, be cut in making
Nail 15 is cut, at this point, opening 10 downlinks of set to expose circulation canal 17, the pump priming mud into cementing tool keeps it logical through recycling
Road 17 enters in the annular space of 5 top of inflatable packer.After cementing, shut-off plug 13 is put into cementing tool to block
Obturating plug 8 is closed, continues thereafter with and suppresses, shear pin 14 is made to cut, at this point, closing 8 downlink of obturating plug, block 9 is no longer compacted, center
Pipe 6, closing set 7 move down, and circulation canal 17 and the circulation canal 17 of outer sleeve 3 thereon is made to be staggered, and realize that cycle is logical
The closing in road 17.Hou Ning is after, tripping in fishing tool, and cementing tool is proposed well head, terminates well cementing operation.As it can be seen that this
The cementing tool that utility model embodiment provides fills in (i.e. drilling and grinding operation) when carrying out well cementing operation, without boring, and then avoids
Due to bore fill in caused by pit shaft be obstructed problem, the half way for being suitable for coal bed gas well net horizontal section is cemented the well.
It should be noted that being simultaneously gradually reduced the shear strength of shear pin 14, middle shear pin 15, lower shear pin 16, to ensure
Lower shear pin 16, middle shear pin 15, upper shear pin 14 are cut successively from front to back, that is, lower shear pin 16 is cut first, then middle shear pin 15
It is cut, then upper shear pin 14 is cut.
Wherein, lifting sub 1 is used for that the cementing tool is made to connect with running string, according to the connector knot of running string
The upper end of structure, lifting sub 1 is designed to the connection header structure of adaptability.
In addition, due to the utility model embodiment provide cementing tool central tube 6 be internally provided with close obturating plug 8,
Set 10 etc. is opened, after the completion of well cementation, by tripping in fishing tool, it is made to be opened in upper carry, to block closing obturating plug 8 or beat
Set 10 is opened, realizes the salvaging of the cementing tool.
It can move down in order to ensure closing obturating plug 8, and be located inside central tube 6 after moving down, the utility model is implemented
In example, it is provided with top bar on the inner wall of central tube 6, there is spacing between top bar and the bottom for closing obturating plug 8, is used for and pass
The bottom of occlusion seat 8 offsets.After upper shear pin 14 is cut, 8 downlink of obturating plug is closed, and seat is in top bar.Wherein, top bar
It can be arranged to ring-shaped step, and its internal diameter does not influence to put into passing through for ball 12.It is understood that top bar and shut-off plug
Seat 8 bottom between spacing with meet close 8 downlink of obturating plug after, no longer compress block 9, so that block 9 is affranchised.
In order to ensure open set 10 can downlink, and after downlink be located at 6 inner wall of central tube, the utility model embodiment
In, it is provided with middle step on the inner wall of central tube 6, there is spacing between middle step and the bottom for opening set 10, is used for and opening
The bottom of set 10 offsets.After shear pin 15 is cut in the middle, 10 downlinks of set are opened, and seat is on middle step.Wherein, middle step can be with
It is arranged to ring-shaped step, and its internal diameter is more than the diameter of input ball 12, is passed through with not influencing to put into ball 12.It is appreciated that
It is after the spacing between 10 bottoms of middle step and opening set is to meet opening 10 downlinks of set, not block circulation canal 17.
For the downlink of ball seat 11, it can make it that there is spacing between the bottom of central tube 6, and in central tube
Setting is got out of a predicament or an embarrassing situation in 6 bottom interior wall, so that the ball seat 11 after downlink is fallen on.
It is above-mentioned to refer to, after closing 8 downlink of obturating plug, central tube 6 and close set 7 also can downlink, in order to ensure under the two
Row space, in the utility model embodiment, closing between 4 top of 7 bottoms of set and lower contact, there is toroidal cavity, toroidal cavity to use
In the closing set 7 for accommodating downlink, it is staggered with the circulation canal 17 on outer sleeve 3 with turning off the circulation canal 17 on set 7；Center
6 bottom of pipe and inflatable packer have spacing, the central tube 6 for accommodating downlink, so that on central tube 6 between 5 top
Circulation canal 17 is staggered with the circulation canal 17 on outer sleeve 3.So set, after central tube 6 and closing set 7 move down,
The circulation canal 17 of the two is staggered with the circulation canal 17 on outer sleeve 3, to realize the closing of circulation canal 17, that is, well cementation
Circulation canal 17 between tool interior and annular space is simultaneously not turned on.
It is understood that central tube 6, opening cover the circulation canal 17 on 10, outer sleeve 3 radially from the inside to the outside
It is successively set on the wall of three.
Above-mentioned to refer to, central tube 6, closing set 7 are closed obturating plug 8 by block 9 and are pressed on outer sleeve 3, work as shut-off plug
After seat 8 moves down, block 9 will be in free state, be based on this, give illustrate to the set-up mode of block 9 below：
As shown in Fig. 1, the gear hole of corresponding connection is radially provided on central tube 6, closing set 7；Outer sleeve 3 it is interior
Gear rank corresponding with gear hole is provided on wall.Block 9 is flexible block, and block 9 is closed obturating plug 8 and is compressed in gear hole and gear rank
In.
In application, being flexible block based on block 9, passes through central tube 6 and close the gear hole on set 7, and one end
On the gear rank of 3 inner wall of outer sleeve, the other end is closed obturating plug 8 and offsets, and block 9 is made to be compressed, and realizes central tube 6, closes
Set 7 and outer sleeve 3 are relatively fixed.After closing obturating plug 8 moves down, no longer compression stop 9, block 9 will restore nature,
And popped up by keeping off on rank, it is moved down to make central tube 6, close set 7.
In the utility model embodiment, when the input input ball 12 into cementing tool, ball seat 11 can be blocked, is made
The major diameter bore being sequentially connected to from top to bottom and path are provided on the ball seat 11 in an axial direction as shown in Fig. 1 for a kind of example
Bore；The internal diameter of major diameter bore is more than the diameter of input ball 12；The internal diameter of path bore is less than the diameter of input ball 12.By setting
Major diameter bore is set, is entered in it in order to put into ball 12, on smooth seat to ball seat 11.By the way that path bore is arranged, to be put into
Ball 12 blocks, and realizes the closure to ball seat 11.
In the utility model embodiment, as shown in Fig. 3, shut-off plug 13 includes：Closure connected in sequence from top to bottom
Section 131 and guide section 132, wherein guide section 132 is used to stretch in the axially extending bore for closing obturating plug 8；Block section 131 is used for
Block the axially extending bore for closing obturating plug 8.By the way that guide section 132 is arranged in order on 13 smooth seat of shut-off plug to closing obturating plug 8.It is logical
Setting block section 131 is crossed, to realize the closure to closing obturating plug 8.
Illustratively, as shown in Fig. 3, block section 131 includes：Ontology is sequentially set on the body multiple from top to bottom
Leather cup body, to improve it and close the leakproofness between obturating plug 8.Guide section 132 can be arranged to taper structure.It is appreciated that
, metal parts may be used in guide section 132 and the ontology of block section 131.
For the ease of the dismounting and assembling of the cementing tool, make in the lower end outer wall of lifting sub 1 and the upper end of top connection 2
Wall is threadedly coupled.The lower end outer wall of top connection 2 is connect with the upper end inner thread of outer sleeve 3；The lower end inner wall of outer sleeve 3 is under
The outer wall thread of connector 4 connects.
In addition, it is necessary to which explanation, inflatable packer 5 are common for this field comprising pass through sulfuration process set
The packing element being located on its ontology is provided with inlet opening on the roof of packing element, check valve is provided in inlet opening, to ensure to inject liquid
By packer feed pathway unidirectionally into packing element is expanded in inlet opening, the setting of inflatable packer 5 is realized.
The size with regard to all parts in the cementing tool, which is given, below illustrates：
Lifting sub 1：Outer diameter 154mm, internal diameter 120mm, the pipe of length 900mm, material are structural alloy steel, and both ends add
Work taper thread is connect by taper thread with top connection 2.
Top connection 2：Outer diameter 190mm, internal diameter 120, mm, the pipe of length 350mm, material are structural alloy steel, and both ends add
Work straight thread, lower end are connect by straight thread with shell.
Central tube 6：Outer diameter 120mm, High-strength aluminum alloy round pipe.
Block 9：The rectangle metal derby of long 40mm, wide 12mm, are processed using high-strength alloy structural steel.
Close obturating plug 8：Outer diameter 80mm, internal diameter 60mm, the cylinder of length 80mm, material are structural alloy steel.
Close set 7：Outer diameter 150mm, internal diameter 120mm, the metal circular tube of length 350mm are processed by structural alloy steel.
Open set 10：Outer diameter 80mm, internal diameter 55mm, the High-strength aluminum alloy round pipe of long 120mm.
Outer sleeve 3：Outer diameter 190mm, internal diameter 150mm, the metal circular tube of length 700mm, material are high-strength alloy structure
Steel.
Lower contact 4：Outer diameter 190mm, internal diameter 120mm, the metal circular tube of length 400mm, upper and lower ends process screw thread, material
For structural alloy steel.
Ball seat 11：Outer diameter 80mm, internal diameter 35mm, the tube and pipe of aluminium alloy of length 60mm.
Put into ball 12：The bakelite ball of diameter 40mm.
The above is only the preferred embodiment of the present invention, the protection domain being not intended to limit the utility model,
Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should be included in this reality
Within novel protection domain.
Claims (10)
1. a kind of coal bed gas horizontal well cementing tool, which is characterized in that the cementing tool includes：Lifting sub (1), top connection
(2), outer sleeve (3), lower contact (4), inflatable packer (5), central tube (6), closing set (7), closing obturating plug (8), block
(9), set (10), ball seat (11), input ball (12), shut-off plug (13) are opened；
The lower end outer wall of the lifting sub (1) is connect with the top connection (2), the lower end outer wall of the top connection (2) and institute
The upper end inner wall connection of outer sleeve (3) is stated, the lower end inner wall of the outer sleeve (3) connects with the upper end outer wall of the lower contact (4)
It connects, the lower end of the lower contact (4) is connect with the inflatable packer (5)；
The central tube (6) is sheathed on the outer sleeve (3) inside, and the closing set (7) is sheathed on the central tube (6) and institute
Between stating outer sleeve (3), the closing obturating plug (8) is sheathed on the central tube (6) inside, the center by upper shear pin (14)
Pipe (6), closing set (7) are pressed on by the closing obturating plug (8) on the outer sleeve (3) by the block (9), work as institute
It states after shear pin (14) cut, the closing obturating plug (8), the central tube (6), closing set (7) can move down；
The circulation canal (17) of conducting is provided on the central tube (6), the wall for closing set (7), the outer sleeve (3),
The set (10) of opening is sheathed on the central tube (6) inside closed below obturating plug (8) by middle shear pin (15), and seals
Block up the circulation canal (17)；
The central tube (6), the lower contact (4) wall on be provided with and be connected to the inlet opening of the inflatable packer (5)
Packer feed pathway, the ball seat (11) by lower shear pin (16) be sheathed on it is described open set (10) below the center
(6) inside is managed, and blocks the packer feed pathway；
The upper shear pin (14), the middle shear pin (15), the lower shear pin (16) shear strength be gradually reduced；
The input ball (12) is for blocking the ball seat (11)；
The shut-off plug (13) is for blocking the closing obturating plug (8).
2. tool according to claim 1, which is characterized in that be provided with top bar on the inner wall of the central tube (6), institute
Stating between top bar and the bottom for closing obturating plug (8) has spacing, for offseting with the bottom of the closing obturating plug (8).
3. tool according to claim 1, which is characterized in that be provided with middle step, institute on the inner wall of the central tube (6)
Stating between step and the bottom for opening set (10) has spacing, for offseting with the bottom for opening set (10).
4. tool according to claim 1, which is characterized in that at the top of closing set (7) bottom and the lower contact (4)
Between there is toroidal cavity, the toroidal cavity is used to accommodate the closing set (7) of downlink, so that closings covers on (7)
Circulation canal (17) be staggered with the circulation canal (17) on the outer sleeve (3)；
There is spacing, for accommodating the described of downlink between at the top of central tube (6) bottom and the inflatable packer (5)
Central tube (6), so that the circulation canal (17) on the central tube (6) and the circulation canal (17) on the outer sleeve (3) are wrong
It opens.
5. tool according to claim 1, which is characterized in that on the central tube (6), closing set (7) radially
It is provided with the gear hole of corresponding connection；
Gear rank corresponding with the gear hole is provided on the inner wall of the outer sleeve (3)；
The block (9) is flexible block, and the block (9) is compressed in the gear hole and the gear by the closing obturating plug (8)
In rank.
6. tool according to claim 1, which is characterized in that be provided in an axial direction on the ball seat (11) suitable from top to bottom
The major diameter bore and path bore of secondary connection；
The internal diameter of the major diameter bore is more than the diameter of the input ball (12)；
The internal diameter of the path bore is less than the diameter of the input ball (12).
7. tool according to claim 1, which is characterized in that the shut-off plug (13) includes：It is sequentially connected with from top to bottom
Block section (131) and guide section (132)；
The guide section (132) is used to stretch in the axially extending bore of the closing obturating plug (8)；
The block section (131) is used to block the axially extending bore of the closing obturating plug (8).
8. tool according to claim 7, which is characterized in that the block section (131) includes：It is ontology, suitable from top to bottom
The multiple leather cup bodies of secondary suit on the body.
9. tool according to claim 1, which is characterized in that the lower end outer wall of the lifting sub (1) with it is described on connect
The upper end inner thread connection of head (2).
10. tool according to claim 1, which is characterized in that the lower end outer wall of the top connection (2) and the outer sleeve
(3) upper end inner thread connection；
The lower end inner wall of the outer sleeve (3) is connect with the upper end outer wall thread of the lower contact (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721836568.2U CN207795145U (en) | 2017-12-25 | 2017-12-25 | A kind of coal bed gas horizontal well cementing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721836568.2U CN207795145U (en) | 2017-12-25 | 2017-12-25 | A kind of coal bed gas horizontal well cementing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207795145U true CN207795145U (en) | 2018-08-31 |
Family
ID=63281592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721836568.2U Active CN207795145U (en) | 2017-12-25 | 2017-12-25 | A kind of coal bed gas horizontal well cementing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207795145U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458158A (en) * | 2018-12-29 | 2019-03-12 | 德州众凯石油科技有限公司 | A kind of quarrying apparatus and method for coal bed gas horizontal well |
| CN111946295A (en) * | 2020-09-04 | 2020-11-17 | 中国石油天然气股份有限公司 | Plug seat |
-
2017
- 2017-12-25 CN CN201721836568.2U patent/CN207795145U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458158A (en) * | 2018-12-29 | 2019-03-12 | 德州众凯石油科技有限公司 | A kind of quarrying apparatus and method for coal bed gas horizontal well |
| CN111946295A (en) * | 2020-09-04 | 2020-11-17 | 中国石油天然气股份有限公司 | Plug seat |
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