CN109458158A - A kind of quarrying apparatus and method for coal bed gas horizontal well - Google Patents
A kind of quarrying apparatus and method for coal bed gas horizontal well Download PDFInfo
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- CN109458158A CN109458158A CN201811634606.5A CN201811634606A CN109458158A CN 109458158 A CN109458158 A CN 109458158A CN 201811634606 A CN201811634606 A CN 201811634606A CN 109458158 A CN109458158 A CN 109458158A
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- obturating plug
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- 239000003245 coal Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012856 packing Methods 0.000 claims abstract description 39
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 239000012634 fragment Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 48
- 239000002002 slurry Substances 0.000 claims description 29
- 239000004568 cement Substances 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to coal-bed gas exploitation field, especially a kind of quarrying apparatus and method for coal bed gas horizontal well, including screen casing, the horizontal well position of the screen insertion to coal seam；Casing, described sleeve pipe are connected with screen casing, tripping in straight well fragment position；Connection component, the connection component connects the screen casing and casing, the connection component include packing device and salvageable contents, and the packing device is connected with shell, and the shell is connected through attachment device with casing；The packing device after expanding with the borehole wall for abutting against.Present invention tripping in screen casing into the horizontal well in coal seam in complete well, coal bed gas is collected by screen casing, interference stratum tripping in casing more than coal seam, while sealing is carried out to casing and borehole wall annular space band in a manner of well cementation, with prevent intrusively layer cbm development is interfered；Not only the natural completion of straight well section may be implemented, but also can guarantee the lossless operation in horizontal segment coal seam, fully met the needs of coal bed gas Efficient Development.
Description
Technical field
The present invention relates to coal-bed gas exploitation field, especially a kind of quarrying apparatus and method for coal bed gas horizontal well.
Background technique
Coal bed gas refers to that matrix of coal particle surface or part are adsorbed in coal seam is free in coal hole or is dissolved in coal
Hydrocarbon gas in layer water, ingredient belong to the associated minerals resource of coal based on methane, belong to Unconventional gas, be nearly one
Cleaning, high-grade energy and the industrial chemicals to emerge in the world for 20 years.The development and utilization of coal bed gas can generate huge economy
Benefit has become important national strategy resource.
The exploitation of coal bed gas generally uses drilling well acquisition method, cements the well after drilling, existing cementing technology
It is the tripping in casing in the open hole well being drilled, configured cement slurry is injected into the annular space of wellbore and casing, to water
Firm cement sheath is formed after mud time is solidifying, casing is fixed, the main function of casing cementing is to insulate oil, gas and water layer,
The ground mutual channelling of inter-layer fluid is prevented, to protect production layer；Severe leakage layer, high pressure zone or other easy collapsings etc. can also be insulated
Bad ground with supporting sleeve and prevents corrosion of the underground fluid to casing.
Nearly 2 years, start to develop coal bed gas using horizontal well technology, cbm development can be greatly improved in horizontal well technology
Effect.Horizontal well development technology mainly includes drilling technology, completion technique and production technology etc..Wherein completion technique is linking
Drilling well and production engineering and relatively independent engineering, be after the drilling well, including completion tubular column design, lower completion tubular column,
One systematic engineering of business of cementing well construction etc..The superiority and inferiority of the height of completion technique level and complete well construction quality, to coal seam
Can gas production, which reach expectation index and the economic benefit of cbm development, conclusive influence.Utilize horizontal well development coal seam
The completion technique of gas, is also in the exploratory stage at present, and for containing the coal seam of coal bed gas, geology characteristic is Fractured or hole
Property, well cementation pollutes coal seam there are cement slurry, influences coal-bed gas exploitation, is not suitable for cementing the well, and other more than coal seam interference layers
It needs to carry out plugging separating, avoids the exploitation for influencing coal bed gas and coal seam.
In view of factors above, a kind of quarrying apparatus and method for coal bed gas horizontal well has been invented.
Summary of the invention
The present invention provides a kind of quarrying apparatus and method for coal bed gas horizontal well, in complete well to the level in coal seam
Tripping in screen casing in well collects coal bed gas by screen casing, the interference stratum tripping in casing more than coal seam, while in a manner of well cementation
Sealing is carried out to casing and borehole wall annular space band, with prevent intrusively layer cbm development is interfered；Both it may be implemented straight
The natural completion of well section, and can guarantee the lossless operation in horizontal segment coal seam, the needs of coal bed gas Efficient Development are fully met, together
When meet the easy reliability of site technology operation, improve the safety of operation, it is raw to have reduced well cost and the exploitation in later period
Cost is produced, solves problems of the prior art.
Used technical solution is the present invention to solve above-mentioned technical problem: a kind of exploitation for coal bed gas horizontal well
Device, comprising:
Screen casing, the horizontal well position of the screen insertion to coal seam；
Casing, described sleeve pipe are connected with screen casing, tripping in straight well fragment position；
Connection component, the connection component connect the screen casing and casing, and the connection component includes packing device and can
The contents of salvaging, the packing device are connected with shell, and the shell is connected through attachment device with casing；
The packing device separates the interference stratum for blocking coal seam or more for abutting against after expanding with the borehole wall；
The contents include the first attachment, the second attachment and third attachment, and first attachment makes slurry in casing
Into packing device, second attachment makes the slurry in casing enter annular space band, and the third attachment distinguishes contents
It is disconnected state with packing device, shell, and closes slurry and enters annular space band position.
Preferably, the packing device includes the central tube being connected with screen casing, and the central tube is connected with packer adapter,
It is equipped with admission chamber on packer adapter, expansion glue cylinder is arranged with outside the central tube, slurry is through admission chamber in described sleeve pipe
Into position between expansion packing element and central tube, make to abut against after expanding packing element expansion with the borehole wall.
Preferably, first attachment includes the ball seat shell being set on packer adapter inner wall, on ball seat shell
Equipped with the inlet being connected with admission chamber, it is arranged with ball seat on ball seat outer casing inner wall, stop collar is equipped on ball seat shell,
The ball seat sliding slot being fastened on stop collar is equipped on ball seat, the ball seat is connected with stop collar through the first pin.
Preferably, second attachment includes the opening obturating plug being arranged inside the housing, and obturating plug is equipped on opening obturating plug
Sliding slot, the ball seat cover top portion are connected with the obturating plug runner position for opening obturating plug through the second pin, the opening obturating plug
It can be moved along obturating plug sliding slot relative to ball seat shell, the ball seat cover top portion is used to limit the moving distance for opening obturating plug, outside
Shell is equipped with the first liquid outlet, and the obturating plug of opening is used to closing or opening the first liquid outlet on shell.
Preferably, the third attachment include be arranged inside the housing can fishing socket, it is described can fishing socket and connection dress
Pin block through activity clamping between setting is connected, and is connected that can set on fishing socket inner wall through third pin and closing obturating plug, the pass
Occlusion seat and pin block abut against, it is described can the bottom of fishing socket be connected with ball seat shell, it is described can the bottom of fishing socket be arranged and exist
Position between ball seat shell and shell, it is described open obturating plug top and can fishing socket abut against, it is described open obturating plug lower part
It is connected through the second pin with ball seat shell, the second liquid outlet being connected with the first liquid outlet can be equipped on fishing socket；Institute
Closed cell can be additionally provided with by stating between fishing socket and shell, the closed cell can follow can fishing socket it is mobile, it is outer for closing
The first liquid outlet on shell.
Preferably, the closed cell include be set in shell and can closedown sliding sleeve between fishing socket, in the closing
Sliding sleeve is equipped with the third liquid outlet being connected with the first liquid outlet, closing block is inserted in the closedown sliding sleeve, in institute
The card slot that closedown sliding sleeve is equipped with the clamping that is connected with closing block is stated, the closing block and outer casing inner wall abut against, the pass
Close sliding sleeve can follow can fishing socket it is mobile, release groove is equipped with below closedown sliding sleeve, the closing block is moved in release groove
Make can fishing socket and closedown sliding sleeve be detached from, the third liquid outlet in the closedown sliding sleeve is moved to and the intersection dislocation of the first liquid outlet
It sets, to close first liquid outlet.
Preferably, the inner diameter > that the inner diameter > of the ball seat opens obturating plug closes the diameter of obturating plug.
Preferably, the attachment device includes the lifting sub that the top connection being connected with shell is connected with top connection, described
Obturating plug is closed to be arranged in top connection position.
A kind of recovery method for coal bed gas horizontal well, comprising the following steps:
S1: first by sequential connection screen casing, connection component and casing from bottom to top, and along drilling well successively tripping in screen casing
String, connection component and bunch tube connect guide shoe in the bottom of screen casing；
Under S2: Xiang Jingzhong after complete tubing string, the cementing head on ground is connected, connects cementing head and cement according to direct circulation manifold
Vehicle transfer pipeline makes the first connecting tube of cementing head be connected with mud channel, makes the second connecting tube of cementing head and the water of outside
Slurry transportation pipeline is connected, and turn on pump well-flushing reaches termination of pumping after requirement；
S3: after the lever position placement rack end socket in cementing head, operation lever enters setting head in well with mud, pumps
Send setting ball to ball seat position, after setting ball abuts to ball seat position, pump truck increases pressure and setting ball is pushed to squeeze ball seat, cuts
The first pin of ball seat and stop collar is connected, is moved down under the impetus of the present blocking of ball seat along ball seat sliding slot, ball seat is detached from ball
Inlet on seat shell manages interior mud from inlet and enters admission chamber, and mud is filled with expansion packing element and central tube through admission chamber
Between, expansion packing element is filled up, expansion packing element abuts to the borehole wall, completes packing movement；
S4: continue to increase and manage interior mud pressure, cut the second pin after opening obturating plug stress, open obturating plug along obturating plug sliding slot
Move down, open obturating plug be detached from can fishing socket the second liquid outlet position, manage in mud through the second liquid outlet, third liquid outlet, the
One liquid outlet enters annular space band, cement slurry is conveyed into well by the second connecting tube of cementing head, cement slurry is under pressure
Into annular space band；
S5: after cement slurry is full of annular space band, dismantling the upper end cover of cementing head, will close rubber plug and is put into cementing head shell
In inner cavity, the bar of cementing head is opened, release closes rubber plug, continues through the first connecting tube pumping mud, will close rubber plug pump
It send to shut-off plug seat and sets, increase mud pressure in managing, close after obturating plug is under pressure and cut third pin, close obturating plug and move down
Make pin block from can be detached between fishing socket and top connection, close obturating plug push can fishing socket move down, and can the ball that connects of fishing socket
Seat shell is also synchronized and is moved down, closedown sliding sleeve follow can fishing socket synchronize and move down, when the pin block of closedown sliding sleeve is moved to release slot position
Postpone, pin block and can the card slot of fishing socket be detached from clamped condition, closedown sliding sleeve abuts at the top of packer adapter, closedown sliding sleeve envelope
The first liquid outlet on shell is closed, cement injection well cementing operation is completed；
S6: start to salvage contents after waiting the cement slurry sets in annular space band, connected in drill string lower end and salvage work
The fishing rod insertion of tool, fishing tool can above mention drill string after lockking fishing socket, take inside out of by fishing tool in fishing socket
Attachment；
S7: construction terminates, and has realized well.
Preferably, releasing spear is selected to salvage the contents.
The beneficial effect of the present invention using the above structure is, in complete well into the horizontal well in coal seam tripping in screen casing, pass through
Screen casing collection coal bed gas, the interference stratum tripping in casing more than coal seam, while to casing and borehole wall annular space in a manner of well cementation
Band carry out sealing, with prevent intrusively layer cbm development is interfered；Not only the natural completion of straight well section may be implemented, but also
The lossless operation that can guarantee horizontal segment coal seam, has fully met the needs of coal bed gas Efficient Development, while meeting site technology
The easy reliability of operation, improves the safety of operation, has reduced the exploitation production cost in well cost and later period.
Detailed description of the invention
Fig. 1 is complete well construction first state structural schematic diagram of the invention.
Fig. 2 is complete well construction the second status architecture schematic diagram of the invention.
Fig. 3 is the structural schematic diagram of connection component of the invention.
Fig. 4 is the structural schematic diagram of cementing head of the invention.
Fig. 5 is the structural schematic diagram of closing rubber plug of the invention.
In figure, 1, screen casing；2, casing；3, connection component；4, shell；401, the first liquid outlet；5, annular space band；6, center
Pipe；7, packer adapter；701, admission chamber；8, packing element is expanded；9, ball seat shell；901, inlet；902, ball seat sliding slot；10,
Ball seat；11, stop collar；12, the first pin；13, obturating plug is opened；1301, obturating plug sliding slot；14, the second pin；It 15, can fishing socket；
1501, the second liquid outlet；16, pin block；17, third pin；18, obturating plug is closed；19, closedown sliding sleeve；1901, third liquid outlet；
20, block is closed；21, release groove；22, top connection；23, lifting sub；24, guide shoe；25, cementing head；2501, the first connection
Pipe；2502, the second connecting tube；2503, lever；26, rubber plug is closed；27, fishing tool.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.
As shown in Figs. 1-5, a kind of quarrying apparatus for coal bed gas horizontal well, comprising:
Screen casing 1, the horizontal well position of 1 tripping in of screen casing to coal seam；
Casing 2, described sleeve pipe 2 are connected with screen casing 1, tripping in straight well fragment position；
Connection component 3, the connection component 3 connect the screen casing 1 and casing 2, and the connection component 3 includes packing device
With salvageable contents, the packing device is connected with shell 4, and the shell 4 is connected through attachment device with casing 2；
The packing device separates the interference stratum for blocking coal seam or more for abutting against after expanding with the borehole wall；
The contents include the first attachment, the second attachment and third attachment, and first attachment makes slurry in casing 2
Into packing device, second attachment makes the slurry in casing 2 enter annular space band 5, and the third attachment makes contents point
Not and packing device, shell 4 are disconnected state, and close slurry and enter 5 position of annular space band.
The packing device includes the central tube 6 being connected with screen casing 1, and the central tube 6 is connected with packer adapter 7,
Packer adapter 7 be equipped with admission chamber 701, expansion glue cylinder 8 is arranged with outside the central tube 6, in described sleeve pipe 2 slurry pass through into
Sap cavity 701 enters position between expansion packing element 8 and central tube 6, makes to abut against after expanding the expansion of packing element 8 with the borehole wall.
First attachment includes the ball seat shell 9 being set on 7 inner wall of packer adapter, is equipped on ball seat shell 9
The inlet 901 being connected with admission chamber 701 is arranged with ball seat 10 on 9 inner wall of ball seat shell, is equipped on ball seat shell 9
Stop collar 11 is equipped with the ball seat sliding slot 902 that is fastened on stop collar 11, the ball seat 10 and stop collar 11 through the on ball seat 10
One pin 12 is connected.
Second attachment includes the opening obturating plug 13 being set in inside shell 4, and it is sliding that obturating plug is equipped on opening obturating plug 13
Slot 1301,9 top of ball seat shell are connected with 1,301 second pin of position 14 of obturating plug sliding slot for opening obturating plug 13, institute
Stating opening obturating plug 13 can move along obturating plug sliding slot 1301 relative to ball seat shell 9, for limiting opening plug at the top of the ball seat shell 9
The moving distance of seat 13 is equipped with the first liquid outlet 401 on shell 4, and the opening obturating plug 13 is for closing or opening shell 4
The first liquid outlet 401.
The third attachment include be set in inside shell 4 can fishing socket 15, it is described can fishing socket 15 and attachment device
Between the pin block 16 through activity clamping be connected, be connected that can set on 15 inner wall of fishing socket through third pin 17 and closing obturating plug 18,
The closing obturating plug 18 and pin block 16 abut against, it is described can the bottom of fishing socket 15 be connected with ball seat shell 9, it is described can fishing socket
15 bottom is arranged between ball seat shell 9 and shell 4 position, the top for opening obturating plug 13 and can fishing socket 15 offset
It connects, second pin of lower part 14 for opening obturating plug 13 is connected with ball seat shell 9, can be equipped with to go out with first on fishing socket 15
The second liquid outlet 1501 that liquid mouth 401 is connected；It can be additionally provided with closed cell between fishing socket 15 and shell 4 described, it is described
Closed cell can follow can fishing socket 15 it is mobile, the first liquid outlet 401 on closure 4.
The closed cell include be set in shell 4 and can closedown sliding sleeve 19 between fishing socket 15, slided in the closing
Set 19 is equipped with the third liquid outlet 1901 being connected with the first liquid outlet 401, is inserted with closing in the closedown sliding sleeve 19
Block 20 is equipped with the card slot for the clamping that is connected with closing block 20, the closing block 20 and shell 4 in the closedown sliding sleeve 19
Inner wall abuts against, the closedown sliding sleeve 19 can follow can fishing socket 15 it is mobile, release groove 21, institute are equipped with below closedown sliding sleeve 19
State close block 20 be moved in release groove 21 make can fishing socket 15 and closedown sliding sleeve 19 be detached from, the in the closedown sliding sleeve 19
Three liquid outlets 1901 be moved to 401 crossing position of the first liquid outlet, to close first liquid outlet 401.
In order to guarantee going on smoothly for constructing operation, the inner diameter > of the ball seat 10 opens the inner diameter of obturating plug 13
The diameter of > closing obturating plug 18.So that the setting ball of investment is passed through closing obturating plug 18 and is opened obturating plug 13 and abuts to ball seat 10
It sets, makes mud pressure in pipe be increased to open the second pin 14 that obturating plug 13 cuts its connection when certain pressure value, make investment
Closing 18 position of obturating plug can be abutted to by closing rubber plug.
It is connected for convenience with casing 2, the attachment device includes the top connection 22 and top connection 22 being connected with shell 4
Connected lifting sub 23, the closing obturating plug 18 are arranged in 22 position of top connection.
A kind of recovery method for coal bed gas horizontal well, comprising the following steps:
S1: first by sequential connection screen casing 1, connection component 3 and casing 2 from bottom to top, and successively tripping in is sieved along drilling well
Pipe string, connection component 3 and bunch tube connect guide shoe 24 in the bottom of screen casing 1；
Under S2: Xiang Jingzhong after complete tubing string, the cementing head 25 on ground is connected, connects 25 He of cementing head according to direct circulation manifold
26 transfer pipeline of cementing truck makes the first connecting tube 2501 of cementing head 25 be connected with mud channel, connects the second of cementing head 25
Adapter tube 2502 is connected with external cement slurry transfer pipeline, and turn on pump well-flushing reaches termination of pumping after requirement；
S3: after the 2503 position placement rack end socket of lever in cementing head 25, operation lever 2503 makes setting head with mud
Into in well, setting ball is pumped to 10 position of ball seat, after setting ball abuts to 10 position of ball seat, it is setting that pump truck increases pressure promotion
Ball squeezes ball seat 10, cuts the first pin 12 of connection ball seat 10 and stop collar 11, and ball seat 10 is present under the impetus of blocking
Moved down along ball seat sliding slot 902, ball seat 10 be detached from ball seat shell 9 on inlet 901, manage in mud from inlet 901 enter into
Sap cavity 701, mud are filled between expansion packing element 8 and central tube 6 through admission chamber 701, and expansion packing element 8 is filled up, and expansion packing element 8 supports
It is connected to the borehole wall, completes packing movement；
S4: continue to increase and manage interior mud pressure, cut the second pin 14 after opening 13 stress of obturating plug, open obturating plug 13 along plug
Seat sliding slot 1301 move down, open obturating plug 13 be detached from can fishing socket 15 1501 position of the second liquid outlet, manage in mud go out through second
Liquid mouth 1501, third liquid outlet 1901, the first liquid outlet 401 enter annular space band 5, pass through the second connecting tube 2502 of cementing head 25
Xiang Jingzhong conveys cement slurry, and cement slurry enters annular space band 5 under pressure；
S5: after cement slurry is full of annular space band 5, dismantling the upper end cover of cementing head 25, will close rubber plug 26 and is put into cementing head
In the inner cavity of shell, the bar 2503 of cementing head 25 is opened, rubber plug 26 is closed in release, continues through the pumping of the first connecting tube 2501
Mud will close rubber plug 26 and be pumped to closing 18 position of obturating plug, and increase mud pressure in managing, and close after obturating plug 18 is under pressure and cut
Disconnected third pin 17, closing obturating plug 18 and moving down makes pin block 16 from that can be detached between fishing socket 15 and top connection 22, closes obturating plug 18
Push can fishing socket 15 move down, with can fishing socket 15 connect ball seat shell 9 also synchronize move down, closedown sliding sleeve 19, which follows, to salvage
Cylinder 15 is synchronized and is moved down, after the pin block 16 of closedown sliding sleeve 19 is moved to 21 position of release groove, pin block 16 and can fishing socket 15 card
Slot is detached from clamped condition, and closedown sliding sleeve 19 abuts to 7 top of packer adapter, and first on 19 closure 4 of closedown sliding sleeve goes out
Liquid mouth 401 completes cement injection well cementing operation；
S6: start to salvage contents after waiting the cement slurry sets in annular space band 5, connected in drill string lower end and salvage work
Tool 27, the insertion of the fishing rod of fishing tool 27 can above mention drill string after lockking fishing socket 15, pass through fishing tool in fishing socket 15
27 take contents out of；
S7: construction terminates, and has realized well.
Releasing spear is selected to salvage the contents.The releasing spear belongs to the prior art, can be direct
Commercial product is selected, is easy to use.
Above-mentioned specific embodiment cannot function as limiting the scope of the invention, for the technology people of the art
For member, any alternate modification or transformation made to embodiment of the present invention are fallen within the scope of protection of the present invention.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art of the present technique.
Claims (10)
1. a kind of quarrying apparatus for coal bed gas horizontal well characterized by comprising
Screen casing, the horizontal well position of the screen insertion to coal seam；
Casing, described sleeve pipe are connected with screen casing, tripping in straight well fragment position；
Connection component, the connection component connect the screen casing and casing, and the connection component includes packing device and can salvage
Contents, the packing device is connected with shell, and the shell is connected through attachment device with casing；
The packing device separates the interference stratum for blocking coal seam or more for abutting against after expanding with the borehole wall；
The contents include the first attachment, the second attachment and third attachment, and first attachment enters slurry in casing
Packing device, second attachment make the slurry in casing enter annular space band, and the third attachment makes contents respectively and seals
It is disconnected state every device, shell, and closes slurry and enters annular space band position.
2. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 1, which is characterized in that the packing dress
The central tube including being connected with screen casing is set, the central tube is connected with packer adapter, admission chamber is equipped on packer adapter,
Expansion glue cylinder is arranged with outside the central tube, slurry enters the meta position of expansion packing element and central tube through admission chamber in described sleeve pipe
It sets, makes to abut against after expanding packing element expansion with the borehole wall.
3. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 2, which is characterized in that described first is attached
Part includes the ball seat shell being set on packer adapter inner wall, and the feed liquor being connected with admission chamber is equipped on ball seat shell
Mouthful, it is arranged with ball seat on ball seat outer casing inner wall, stop collar is equipped on ball seat shell, is equipped on ball seat and is fastened on stop collar
On ball seat sliding slot, the ball seat is connected with stop collar through the first pin.
4. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 3, which is characterized in that described second is attached
Part includes the opening obturating plug being arranged inside the housing, and obturating plug sliding slot, the ball seat cover top portion and institute are equipped on opening obturating plug
The obturating plug runner position for stating opening obturating plug is connected through the second pin, and the opening obturating plug can be moved along obturating plug sliding slot with respect to ball seat shell
Dynamic, the ball seat cover top portion is used to limit the moving distance for opening obturating plug, is equipped with the first liquid outlet, the opening on the shell
Obturating plug is used to closing or opening the first liquid outlet on shell.
5. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 4, which is characterized in that the third is attached
Part include be arranged inside the housing can fishing socket, it is described can between fishing socket and attachment device through activity clamping pin block phase
Even, be connected through third pin and closing obturating plug can set on fishing socket inner wall, the closing obturating plug and pin block abut against, it is described can
The bottom of fishing socket is connected with ball seat shell, it is described can fishing socket bottom be arranged between ball seat shell and shell position, institute
State open obturating plug top and can fishing socket abut against, it is described open obturating plug the second pin of lower part be connected with ball seat shell,
The second liquid outlet being connected with the first liquid outlet can be equipped on fishing socket；It can be additionally provided between fishing socket and shell described
Closed cell, the closed cell can follow can fishing socket it is mobile, the first liquid outlet on closure.
6. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 5, which is characterized in that the closing is single
Member include be set in shell and can closedown sliding sleeve between fishing socket, be equipped in the closedown sliding sleeve and be connected with the first liquid outlet
Logical third liquid outlet, is inserted with closing block in the closedown sliding sleeve, is equipped with and closes block in the closedown sliding sleeve
Be connected the card slot of clamping, and the closings block and outer casing inner wall abut against, the closedown sliding sleeve can follow can fishing socket move,
Be equipped with release groove below closedown sliding sleeve, the closings block be moved in release groove make can fishing socket and closedown sliding sleeve disengaging, institute
State the third liquid outlet in closedown sliding sleeve be moved to the first liquid outlet crossing position, to close first liquid outlet.
7. a kind of quarrying apparatus for coal bed gas horizontal well according to claim 6, which is characterized in that the ball seat
The inner diameter > that inner diameter > opens obturating plug closes the diameter of obturating plug.
8. a kind of quarrying apparatus for coal bed gas horizontal well according to any one of claims 1 to 7, which is characterized in that
The attachment device includes the lifting sub that the top connection being connected with shell is connected with top connection, and the closing obturating plug setting exists
Top connection position.
9. based on a kind of recovery method for coal bed gas horizontal well according to any one of claims 8, which is characterized in that including following step
It is rapid:
S1: first by sequential connection screen casing, connection component and casing from bottom to top, and along drilling well successively tripping in screen casing string, even
Connected components and bunch tube connect guide shoe in the bottom of screen casing；
Under S2: Xiang Jingzhong after complete tubing string, the cementing head on ground is connected, cementing head is connected according to direct circulation manifold and cementing truck is defeated
Pipeline is sent, the first connecting tube of cementing head is made to be connected with mud channel, makes the second connecting tube of cementing head and the cement slurry of outside
Transfer pipeline is connected, and turn on pump well-flushing reaches termination of pumping after requirement；
S3: after the lever position placement rack end socket in cementing head, operation lever enters setting head in well with mud, pumps seat
Blocking is to ball seat position, and after setting ball abuts to ball seat position, pump truck increases pressure and setting ball is pushed to squeeze ball seat, cuts connection
First pin of ball seat and stop collar, ball seat be present blocking impetus under moved down along ball seat sliding slot, ball seat be detached from ball seat outside
Inlet on shell manages interior mud from inlet and enters admission chamber, and mud is filled between expansion packing element and central tube through admission chamber,
Expansion packing element is filled up, expansion packing element abuts to the borehole wall, completes packing movement；
S4: continue to increase and manage interior mud pressure, cut the second pin after opening obturating plug stress, open obturating plug under obturating plug sliding slot
Move, open obturating plug be detached from can fishing socket the second liquid outlet position, manage in mud through the second liquid outlet, third liquid outlet, first
Liquid outlet enters annular space band, conveys cement slurry into well by the second connecting tube of cementing head, cement slurry under pressure into
Enter annular space band；
S5: after cement slurry is full of annular space band, dismantling the upper end cover of cementing head, and closing rubber plug is put into the inner cavity of cementing head shell
In, the bar of cementing head is opened, release closes rubber plug, continues through the first connecting tube pumping mud, will close rubber plug and is pumped to
Shut-off plug seat is set, and mud pressure in managing is increased, and is closed after obturating plug is under pressure and is cut third pin, and closing obturating plug and moving down makes pin
Block from can be detached between fishing socket and top connection, close obturating plug push can fishing socket move down, and can be outside the ball seat that connects of fishing socket
Shell is also synchronized and is moved down, closedown sliding sleeve follow can fishing socket synchronize and move down, after the pin block of closedown sliding sleeve is moved to release groove location,
Pin block and can the card slot of fishing socket be detached from clamped condition, closedown sliding sleeve abuts at the top of packer adapter, and closedown sliding sleeve closing is outer
The first liquid outlet on shell completes cement injection well cementing operation；
S6: starting to salvage contents after waiting the cement slurry sets in annular space band, connects fishing tool in drill string lower end, beats
The fishing rod insertion of fishing combined tool can above mention drill string after lockking fishing socket, take contents out of by fishing tool in fishing socket；
S7: construction terminates, and has realized well.
10. based on a kind of recovery method for coal bed gas horizontal well as claimed in claim 9, which is characterized in that selection can move back
Formula fishing spear salvages the contents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811634606.5A CN109458158A (en) | 2018-12-29 | 2018-12-29 | A kind of quarrying apparatus and method for coal bed gas horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811634606.5A CN109458158A (en) | 2018-12-29 | 2018-12-29 | A kind of quarrying apparatus and method for coal bed gas horizontal well |
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| CN109458158A true CN109458158A (en) | 2019-03-12 |
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| CN201811634606.5A Pending CN109458158A (en) | 2018-12-29 | 2018-12-29 | A kind of quarrying apparatus and method for coal bed gas horizontal well |
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