CN106907127A - Cement retains tubing string and squeezing off instrument - Google Patents
Cement retains tubing string and squeezing off instrument Download PDFInfo
- Publication number
- CN106907127A CN106907127A CN201510982812.5A CN201510982812A CN106907127A CN 106907127 A CN106907127 A CN 106907127A CN 201510982812 A CN201510982812 A CN 201510982812A CN 106907127 A CN106907127 A CN 106907127A
- Authority
- CN
- China
- Prior art keywords
- central tube
- tubing string
- cement
- packing element
- squeezing
- 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.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims abstract description 82
- 238000007789 sealing Methods 0.000 claims abstract description 66
- 238000012856 packing Methods 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000037361 pathway Effects 0.000 claims description 23
- 238000004026 adhesive bonding Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000000717 retained effect Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of cement and retains tubing string and squeezing off instrument, and cement retains tubing string includes cement retaining devices and seating and sealing unit, and cement retaining devices include：Expansion packing element, exterior central tube and control unit, seating and sealing unit include：Including inner central tube, sliding sleeve pipe, when squeezing off is carried out, grappling of the squeezing tubing string in open hole well and sealing are realized using packing element is expanded, due to forming the inner chamber body of sealing between exterior central tube and expansion packing element, with in inner chamber body, liquid increases, expansion packing element gradually expands, until expansion packing element integrally fits with the borehole wall, squeezing tubing string is set to be fixed on precalculated position, wherein control unit plays a part of one-way sealing, ensure that liquid will not flow out because of the change of cavity internal pressure in inner chamber body, ensure to be expanded when squeezing off is constructed packing element with sealing state stable in well, so as to improve the success rate of squeezing off construction in open hole well.
Description
Technical field
Tubing string and squeezing are retained the present invention relates to Oil and Gas Exploration Drilling art, more particularly to a kind of cement
Cement instrument.
Background technology
Exploration oil, during gas well, in oil, gas well cement be subject to oil, fate move and stratum is various should
Power effect, the combined influence of many factors such as burn into casing programme is unreasonable so that oil, gas well reclaimed water
Mud is destroyed, and causes oil reservoir to gang up, formation cementation thing is destroyed, and near wellbore zone forms cavity, or because
Sleeve pipe is run-down to prevent oil well from normally producing, at this time, it may be necessary to workover treatment.In workover treatment, it is necessary to
Constructed by squeezing off, repaired at destruction, oil, gas well is resumed production.
In general, oil, gas well are divided into cased well and open hole well according to whether upper sleeve pipe, wherein, set
Pipe well is the oil of upper sleeve pipe, gas well, and open hole well is oil, the gas well for not going up sleeve pipe.Carried out to cased well
, it is necessary to be worked using squeezing off in squeezing off work progress.At present, squeezing off instrument includes water
Mud retains device, setting tool, squeeze tool.Wherein, cement retains device for slips anchoring structure, compression
Formula sleeve is directly set in cement and retains on device, by compression sleeve extruding, by compression sleeve with
The borehole wall is fitted, so as to be sealed to oil, gas well.
However, when cement squeezing construction is carried out to open hole well, because the open hole well borehole wall is rock, the borehole wall
Uneven and irregular, the cement of slips anchoring structure retains device cannot be anchored on the borehole wall, sealing effect
Really poor, the success rate that the squeezing off caused in open hole well is constructed is low, and plugging effect is poor.
The content of the invention
The present invention provides a kind of cement and retains tubing string and squeezing off instrument, to realize entering water-filling to open hole well
When mud is squeezed, effective sealing of squeezing off instrument and the open hole well borehole wall, so as to improve open hole well squeezing water
The success rate of mud construction.
In a first aspect, the embodiment of the present invention provides a kind of cement retains tubing string, including：Cement retaining devices
With seating and sealing unit, wherein,
The cement retaining devices include：Expansion packing element, exterior central tube and control unit, the expansion glue
Jacket casing is sealed on the exterior central tube so as to be formed between the expansion packing element and the exterior central tube
Inner chamber body, the first feed pathway connected with the inner chamber body is offered on the tube wall of the exterior central tube,
The control unit is arranged in first feed pathway, single to inner chamber body inside for controlling liquid
To flowing；
The seating and sealing unit includes：Including inner central tube, sliding sleeve pipe, opened on the tube wall of the inner central tube
The second feed pathway is provided with, the inner central tube is stretched into the exterior central tube, second feed liquor leads to
Road is connected with first feed pathway, and the sliding sleeve pipe is stretched into the inner central tube, for blocking
Second feed pathway.
Optionally, the cement retaining devices also include gluing seat of reel and lower rubber cylinder base, wherein,
First annular groove is offered on the outer ring surface of the gluing seat of reel；
The second annular groove is offered on the outer ring surface of the lower rubber cylinder base；
First annular projection, the expansion packing element first end are set on the inwall of the expansion packing element first end
It is enclosed within the gluing seat of reel, the first annular projection is stretched into the first annular groove；
The second annular protrusion, the end of expansion packing element second are set on the inwall at expansion packing element second end
It is enclosed within the lower rubber cylinder base, second annular protrusion is stretched into second annular groove.
Optionally, the gluing seat of reel is connected with the inner central tube by pin.
Optionally, the seating and sealing unit also includes：Top connection, upper overcoat, piston of giving up, wherein,
The top connection is arranged on the seating and sealing unit top, the inwall of the top connection and the interior center
Pipe is connected through a screw thread, and the lower surface of the top connection is inconsistent with the upper surface of the piston of giving up, institute
Overcoat is stated to be set on the top connection and the outer wall of the piston of giving up.
Optionally, the upper overcoat offers first through hole corresponding to the first position of the inner central tube,
The first through hole is used to connect inside and outside the piston of giving up；The upper overcoat corresponds to the inner central tube
The second place offer the second through hole, second through hole is used to insert the pin；
The one end of the pin deeply to the internal piston of giving up is arranged limited location link, the spacing extension
The first end of ring is inconsistent with the gluing seat of reel, when the piston of giving up reaches to the upper packing element movement
During to precalculated position, the second end of the spacing link contradicts with the piston of giving up, described for hindering
Piston of giving up is continued to move to；
The position of correspondence second through hole is provided with upper-side hole on the inner central tube, and the upper-side hole is used
In the pin is inserted, the upside hole site that the sliding sleeve pipe corresponds to the inner central tube offers
Groove, one end of the pin deeply in the groove, for making the sliding sleeve pipe with the interior center
Pipe is fixed；
The inwall of the piston of giving up fits with the inner central tube, for blocking the upper-side hole.
Optionally, the cement retaining devices also include：Limited location snap ring, spring connector, lower contact,
Wherein,
The inner central tube is inserted into the bottom of cement retaining devices and the spring connector is mounted, and
The spring connector is driven to be moved in the cement retaining devices；
The spring connector includes end and spring detent, and the end is in hollow cylindrical, the end
The lower surface in portion is inconsistent with the inwall of the lower contact, and the spring detent includes that interval same distance is set
The many point pawls on the end upper ring surface；
The limited location snap ring is fixed in the lower contact, the movement for limiting the spring detent.
Optionally, offered on the outer wall of the exterior central tube annular groove, the expansion packing element it is interior
Wall is sealed with the first side wall and second sidewall of the groove both sides, so that groove composition is described
Inner chamber body.
Optionally, annular seal groove is offered on the first side wall, the seal groove enters with described first
Liquid channel connection；
The control unit is the y-type seal ring or V-shaped seal ring being arranged in the annular seal groove.
Optionally, the control unit is ball-and-seat.
Second aspect, the embodiment of the present invention also provides a kind of squeezing off instrument, including as above either type
The cement of realization retains tubing string and squeezing tubing string.
Cement provided in an embodiment of the present invention retains tubing string and squeezing off instrument, and cement retains tubing string to be included
Cement retaining devices and seating and sealing unit, cement retaining devices include：Expansion packing element, exterior central tube and control
Portion processed, seating and sealing unit includes：Including inner central tube, sliding sleeve pipe, when squeezing off is carried out, using expansion
Packing element realizes grappling of the squeezing tubing string in open hole well and sealing, due to exterior central tube and expansion packing element it
Between form the inner chamber body of sealing, with inner chamber body, liquid increases, and expansion packing element gradually expands, until
Expansion packing element is integrally fitted with the borehole wall, squeezing tubing string is fixed on precalculated position, and wherein control unit is played
The effect of one-way sealing, it is ensured that liquid will not flow out because of the change of cavity internal pressure in inner chamber body, it is ensured that
The sealing state of packing element and stabilization in well is expanded when squeezing off is constructed, is squeezed so as to improve in open hole well
The success rate of cementing practice.
Brief description of the drawings
Fig. 1 retains the structural representation of tubing string for cement that one embodiment of the invention is provided；
Fig. 2 is the partial enlarged drawing of part A in Fig. 1；
Fig. 3 is the partial enlarged drawing of part B in Fig. 1；
The structural representation of the squeezing tubing string of the squeezing off instrument that Fig. 4 is provided for one embodiment of the invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with this hair
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, what those skilled in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Fig. 1 retains the structural representation of tubing string for cement that one embodiment of the invention is provided；Fig. 2 is Fig. 1
The partial enlarged drawing of middle part A；Fig. 3 is the partial enlarged drawing of part B in Fig. 1.Below, with reference to figure
The structure and working principle that 1~Fig. 3 retains tubing string to the cement described in the embodiment of the present invention is carried out specifically
It is bright.
First, cement retains the structure of tubing string.
Fig. 1~Fig. 3 is refer to, cement provided in an embodiment of the present invention retains tubing string includes cement retaining devices
With seating and sealing unit, wherein, the cement retaining devices include：For seal open hole well expansion packing element 10,
Exterior central tube 11 and control unit 12, the expansion packing element set 10 on the exterior central tube 11, from
And the inner chamber body of sealing is formed between the expansion packing element 10 and the exterior central tube 11, it is described it is outer in
The first feed pathway connected with the inner chamber body, the control unit 12 are offered on the tube wall of heart pipe 11
It is arranged in first feed pathway, for controlling liquid to inner chamber body inside one-way flow；Institute
Stating seating and sealing unit includes：Including inner central tube 20, sliding sleeve pipe 21, on the tube wall of the inner central tube 20
The second feed pathway is offered, the inner central tube 20 is stretched into the exterior central tube 11, described
Two feed pathways are connected with first feed pathway, and the sliding sleeve pipe 21 is stretched into the inner central tube
In 20, for blocking second feed pathway.Seating and sealing unit is connected with cement retaining devices by pin
Into an entirety.
Secondly, cement retains the operation principle of tubing string.
Specifically, when squeezing off is carried out, cement is retained tubing string and is lowered into be needed to carry out squeezing off
In the well of construction, cement is injected liquid into by water pump and is retained in tubing string, input in pipe is retained in cement
Steel ball simultaneously increases pump pressure, and steel ball promotes sliding sleeve pipe to move downward, and makes the second feed liquor opened up on inner central tube
Passage exposes.Under the effect of the pressure, liquid is by the first feed pathway and the second feed pathway and control
Portion processed is unidirectionally entered into the inner chamber body that sealing is formed between exterior central tube and expansion packing element, so as to realize water
Mud squeezes grappling of the tubing string in open hole well and sealing.During being somebody's turn to do, squeezing pipe is realized using packing element is expanded
Grappling of the post in open hole well and sealing, due to forming the inner chamber of sealing between exterior central tube and expansion packing element
Body, with inner chamber body, liquid increases, and expansion packing element gradually expands, until expansion packing element entirety and well
Wall fits, and squeezing tubing string is fixed on precalculated position, and wherein control unit plays a part of one-way sealing,
Ensure that liquid will not flow out because of the change of cavity internal pressure in inner chamber body.
Cement provided in an embodiment of the present invention retains tubing string, including cement retaining devices and seating and sealing unit, water
Mud retaining devices include：Expansion packing element, exterior central tube and control unit, seating and sealing unit include：Including interior
Central tube, sliding sleeve pipe, when squeezing off is carried out, realize squeezing tubing string in open hole well using packing element is expanded
Interior grappling and sealing, due to forming the inner chamber body of sealing between exterior central tube and expansion packing element, with interior
Liquid increases in cavity, and expansion packing element gradually expands, until expansion packing element integrally fits with the borehole wall,
Squeezing tubing string is set to be fixed on precalculated position, wherein control unit plays a part of one-way sealing, it is ensured that inner chamber body
Interior liquid will not flow out because of the change of cavity internal pressure, it is ensured that when squeezing off is constructed expand packing element with
The sealing state of stabilization in well, so as to improve the success rate of squeezing off construction in open hole well.
Optionally, in an embodiment of the present invention, the cement retaining devices also include gluing seat of reel 13
With lower rubber cylinder base 14, wherein, offered on the outer ring surface of the gluing seat of reel 13 first annular recessed
Groove；The second annular groove is offered on the outer ring surface of the lower rubber cylinder base 14；The expansion packing element 10
First annular projection is set on the inwall of first end, and the first end of expansion packing element 10 is enclosed within the upper packing element
On base 13, the first annular projection is stretched into the first annular groove；The expansion packing element 10
Second annular protrusion is set on the inwall at the second end, and the end of the expansion packing element 10 second is enclosed within the lower rubber cylinder
On base 14, second annular protrusion is stretched into second annular groove.When seating and sealing unit and cement
When retaining devices are connected, the gluing seat of reel 13 of cement retaining devices and the inner central tube 20 of seating and sealing unit
Connected by pin.During squeezing off, due to having the larger liquid of pressure, the first ring in inner chamber body
The raised cooperation with first annular groove of shape, the second annular protrusion can make with the cooperation of the second annular groove
What packing element was more consolidated is fixed.
Specifically, offering the groove of annular, the expansion packing element on the outer wall of the exterior central tube 11
10 inwall is sealed with the first side wall and second sidewall of the groove both sides, so that the groove structure
Into the inner chamber body.Annular seal groove, the seal groove and described first are offered on the first side wall
Feed pathway is connected；The control unit 12 is the y-type seal ring or V being arranged in the annular seal groove
Type sealing ring, the control unit 12 is, for example, ball-and-seat.
In above-described embodiment, when seating and sealing unit is connected with cement retaining devices, cement retaining devices it is upper
Packing element base 13 is connected with the inner central tube 20 of seating and sealing unit by pin.Below, to the setting of pin
Position is described in detail.
Specifically, in an embodiment of the present invention, the seating and sealing unit also includes：It is top connection 22, upper outer
Set 23, give up piston 24 and sealing ring, wherein, the top connection 22 is arranged on the seating and sealing unit
Top, the inwall of the top connection 22 is connected through a screw thread with the inner central tube 20, the top connection
22 lower surface is inconsistent with the upper surface of the piston 24 of giving up, and the upper overcoat 23 is set in described
On top connection 22 and the outer wall of the piston 24 of giving up, that is, overcoat 23 is gone up positioned at seating and sealing unit outermost layer.
Wherein, the upper overcoat 23 offers first through hole corresponding to the first position of the inner central tube 20,
The first through hole is used to connect inside and outside the piston 24 of giving up；The upper overcoat 23 corresponds in described
The second place of central tube 20 offers the second through hole, and second through hole is used to insert the pin；Institute
State pin and be deeply arranged limited location link 25, the spacing extension to the one end inside the piston 24 of giving up
The first end of ring 25 is inconsistent with the gluing seat of reel 13, when the piston 24 of giving up is to the gluing
When cylinder is moved to precalculated position, the second end of the spacing link 25 contradicts with the piston 24 of giving up,
For hindering the piston 24 of giving up to continue to move to；Correspondence second through hole on the inner central tube 20
Position be provided with upper-side hole, the upper-side hole is used to insert the pin, and the sliding sleeve pipe 21 corresponds to
The upside hole site of the inner central tube 20 offers groove, and one end of the pin is deeply extremely described
In groove, for fixing the sliding sleeve pipe 21 and the inner central tube 20；The piston 24 of giving up
Inwall fits with the inner central tube 20, for blocking the upper-side hole.
Fig. 3 is refer to again, and optionally, in an embodiment of the present invention, the cement retaining devices are also wrapped
Include：Limited location snap ring 15, spring connector 16, lower contact 17 and sealing ring.When seating and sealing unit with
When cement retaining devices are connected, the gluing seat of reel 13 of cement retaining devices and the inner central tube of seating and sealing unit
20 are connected by pin, and the inner central tube 20 is inserted into the bottom of cement retaining devices and the spring
Attachment means 16 are mounted, and drive the spring connector 16 to be moved in the cement retaining devices.
After spring connector 16 is moved up, the inside and outside connection side opening of lower contact 17 is sealed.It is of the invention real
Apply in example, in addition to control unit is Y types or V-shaped seal ring, this is used to seal the inside and outside of lower contact 17
The sealing ring for connecting side opening is O-ring seal.
Specifically, the spring connector 16 includes end and spring detent, the end is in hollow cylinder
Shape, the lower surface of the end is inconsistent with the inwall of the lower contact 17, and the spring detent includes interval
Same distance is arranged on many point pawls on the end upper ring surface；The pawl head of spring detent is provided with to carry hangs convex
Rise, the bottom of inner central tube 20 is provided with correspondence and carries hanging and raised carries hanging platform rank.When inner central tube 20 is deep
Enter in spring connector 16, inner central tube 20 carry hanging platform rank and spring connector 16 carry extension
Raised mutually to mount, inner central tube 20 can drive spring connector 16 to move.In lower contact 17 is offered
The annular side opening of outer connection, one end of the annular side opening is corresponding with the pawl seam of spring connector 16, when
When inner central tube 20 and spring detent carry extension and be connecteds, the slotted eye of inner central tube 20 can be stitched by spring detent pawl and
The annular side opening of lower contact 17 is connected.The limited location snap ring 15 is fixed in the lower contact 17, is used
In the movement for limiting the spring detent.After the pawl head of spring detent moves to the top of limited location snap ring 15, spring
Pawl resets under elastic reaction, and inner central tube 20 extracts separation from spring detent.
In general, squeezing off construction includes well-flushing, sets, gives up and unseal these processes.Under
Face, on the basis of above-mentioned cement retains tubular column structure, the operation principle that tubing string is retained to cement is entered to advance
One step is explained.
Well-flushing：Seating and sealing unit and cement extruding injection device are connected into an entirety by pin, well is lowered into
Interior precalculated position, wherein, the inner central tube bottom of seating and sealing unit carries hanging platform rank and spring connector
Carry that extension is raised mutually to be mounted, between the slotted eye of the bottom of inner central tube and the spring detent of spring connector
Pawl is stitched and the side opening of lower contact is connected, and inner central tube is injected liquid into by water pump, and by interior
The side opening of pawl seam and lower contact between the slotted eye of the bottom of heart pipe and the spring detent of spring connector enters
Row well-flushing.
Set：Steel ball is put into seating and sealing unit tubing string, i.e., puts into steel in the inner central tube of seating and sealing unit
Ball, when steel ball rolling to it is inconsistent with sliding sleeve pipe when, improve pump pressure in seating and sealing unit tubing string, steel ball is promoted
Sliding sleeve pipe is moved downward, and cuts the pin in inner central tube upper-side hole, and steel ball continues fortune downwards with sliding sleeve pipe
Dynamic, the upper-side hole and the second feed pathway blocked by sliding sleeve pipe on inner central tube expose, in seating and sealing unit
In tubing string in the presence of pressure, liquid is through the second feed pathway on inner central tube, on exterior central tube
One feed pathway and control unit enter into the inner chamber body of expansion packing element, and expansion packing element is expanded into and well
Wall is brought into close contact, and completes setting for cement retaining devices.Seating and sealing unit tubing string is by being connected to oil pipe or brill
Precalculated position is sent to below bar, oil pipe or drilling rod are referred to as seating and sealing unit tubing string with seating and sealing unit.
Give up：After hydraulically full in the inner chamber body of cement retaining devices, continue to improve ground pump-in pressure,
Liquid enters into the upper surface of the piston head of piston of giving up by the upper-side hole of inner central tube, promotes work of giving up
Plug is pressed down against gluing seat of reel, while entering into the liquid-driving of the upper surface of the piston head of piston of giving up
Top connection drives inner central tube to move upwards, until connection gluing seat of reel is cut with the pin of inner central tube
It is disconnected.When piston of giving up moves downwardly to spacing link, the upper outer first through hole for putting is exposed, in tubing string
Outer connection, that is, the inside and outside connection of piston of giving up, forms quick pressure releasing, it was demonstrated that connection gluing seat of reel with it is interior in
The pin of heart pipe is successfully cut.Inner central tube upwards motion while, drive spring connector to
Upper motion, motion is blocked up to by the annular side opening of lower contact upwards for the end of spring connector, spring
After the spring detent of attachment means moves to limited location snap ring top, spring detent resets under elastic reaction, makes bullet
Spring pawl is separated with the inner central tube that it is hung, and spring detent rests on limited location snap ring top, so as to complete to give up
And cement retaining devices are closed, and seating and sealing unit is risen.
Deblocking：When deblocking is needed after the completion of cement squeezing construction, enter to bore grinder tool in Jing Zhongxia, to water
Mud retaining devices carry out brill mill, the drilled height for grinding off, expanding packing element inner chamber body of control unit of gluing bobbin post
Pressure releasing pressure automatically, expansion packing element resilience is resetted, and deblocking is completed.
In addition, on the basis of above-mentioned cement retains tubing string, the embodiment of the present invention also provides a kind of squeezing water
Bricklayer's has, and it includes that the cement that squeezing tubing string is realized with any of the above-described embodiment retains tubing string.Below, originally
The squeezing tubing string that the work of invention squeezing off includes is described in detail, specifically, Fig. 4 is refer to, Fig. 4
It is the structural representation for squeezing tubing string of the squeezing off instrument that one embodiment of the invention is provided.
Refer to Fig. 4, the squeezing tubing string of squeezing off instrument provided in an embodiment of the present invention, including squeezing
Pipe 40, the bottom of squeezing pipe 40 has notch 401 and carries hanging platform rank.When squeezing off construction is carried out,
The spring connector that squeezing pipe retains tubing string with cement is connected, and the hanging platform rank that carries for squeezing pipe is connected with spring
The raised phase of extension that carries of device is mounted, and spring connector is back into initial position, the annular of lower contact
Side opening exposes.
When squeezing off is constructed, cement is retained into tubing string and is lowered into the well for needing to carry out squeezing off construction,
Pump into cement mortar from squeezing pipe, cement mortar stitched with the pawl of spring detent by the notch of squeezing pipe bottom and
Lower contact side opening is squeezed into the lower section that cement retains tubing string.After the completion of cement squeezing, squeezing pipe is above carried
Post, the hanging platform rank that carries of squeezing tubing string bottom drives spring connector up, the end of spring connector
Move upwards therewith and block the annular side opening of lower contact, and then close cement retaining devices, spring connects
After the spring detent of connection device moves to limited location snap ring top, spring detent resets under elastic reaction, squeezing pipe
Extracted from spring detent and separated, so as to complete cement squeezing construction.
Squeezing off instrument provided in an embodiment of the present invention, including cement retains tubing string and squeezing tubing string, water
Mud retains tubing string includes cement retaining devices and seating and sealing unit.When squeezing off is carried out, using expanding glue
Cylinder realizes grappling of the squeezing tubing string in open hole well and sealing, due to shape between exterior central tube and expansion packing element
Into the inner chamber body of sealing, with inner chamber body, liquid increases, and expansion packing element gradually expands, until expansion
Packing element is integrally fitted with the borehole wall, squeezing tubing string is fixed on precalculated position, and wherein control unit is played unidirectionally
The effect of sealing, it is ensured that liquid will not flow out because of the change of cavity internal pressure in inner chamber body, it is ensured that squeezing
The sealing state of packing element and stabilization in well is expanded during cementing practice, water is squeezed in open hole well so as to improve
The success rate of mud construction.
One of ordinary skill in the art will appreciate that：Realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the related hardware of programmed instruction.Foregoing program can be stored in a computer can
In reading storage medium.The program upon execution, performs the step of including above-mentioned each method embodiment；And
Foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with store program codes
Medium.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than right
Its limitation；Although being described in detail to the present invention with reference to foregoing embodiments, this area it is common
Technical staff should be understood：It can still modify to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to which part or all technical characteristic；And these modifications or replacement, and
The scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution is not made.
Claims (10)
1. a kind of cement retains tubing string, it is characterised in that including：Cement retaining devices and seating and sealing unit,
Wherein,
The cement retaining devices include：Expansion packing element, exterior central tube and control unit, the expansion glue
Jacket casing is sealed on the exterior central tube so as to be formed between the expansion packing element and the exterior central tube
Inner chamber body, the first feed pathway connected with the inner chamber body is offered on the tube wall of the exterior central tube,
The control unit is arranged in first feed pathway, single to inner chamber body inside for controlling liquid
To flowing；
The seating and sealing unit includes：Including inner central tube, sliding sleeve pipe, opened on the tube wall of the inner central tube
The second feed pathway is provided with, the inner central tube is stretched into the exterior central tube, second feed liquor leads to
Road is connected with first feed pathway, and the sliding sleeve pipe is stretched into the inner central tube, for blocking
Second feed pathway.
2. cement according to claim 1 retains tubing string, it is characterised in that the cement retains dress
Putting also includes gluing seat of reel and lower rubber cylinder base, wherein,
First annular groove is offered on the outer ring surface of the gluing seat of reel；
The second annular groove is offered on the outer ring surface of the lower rubber cylinder base；
First annular projection, the expansion packing element first end are set on the inwall of the expansion packing element first end
It is enclosed within the gluing seat of reel, the first annular projection is stretched into the first annular groove；
The second annular protrusion, the end of expansion packing element second are set on the inwall at expansion packing element second end
It is enclosed within the lower rubber cylinder base, second annular protrusion is stretched into second annular groove.
3. cement according to claim 2 retains tubing string, it is characterised in that the gluing seat of reel
It is connected by pin with the inner central tube.
4. cement according to claim 3 retains tubing string, it is characterised in that the seating and sealing unit is also
Including：Top connection, upper overcoat, piston of giving up, wherein,
The top connection is arranged on the seating and sealing unit top, the inwall of the top connection and the interior center
Pipe is connected through a screw thread, and the lower surface of the top connection is inconsistent with the upper surface of the piston of giving up, institute
Overcoat is stated to be set on the top connection and the outer wall of the piston of giving up.
5. cement according to claim 4 retains tubing string, it is characterised in that the upper overcoat correspondence
First through hole is offered in the first position of the inner central tube, the first through hole is used to connect described losing
Inside and outside hand piston；The second place that the upper overcoat corresponds to the inner central tube offers the second through hole,
Second through hole is used to insert the pin；
The one end of the pin deeply to the internal piston of giving up is arranged limited location link, the spacing extension
The first end of ring is inconsistent with the gluing seat of reel, when the piston of giving up reaches to the upper packing element movement
During to precalculated position, the second end of the spacing link contradicts with the piston of giving up, described for hindering
Piston of giving up is continued to move to；
The position of correspondence second through hole is provided with upper-side hole on the inner central tube, and the upper-side hole is used
In the pin is inserted, the upside hole site that the sliding sleeve pipe corresponds to the inner central tube offers
Groove, one end of the pin deeply in the groove, for making the sliding sleeve pipe with the interior center
Pipe is fixed；
The inwall of the piston of giving up fits with the inner central tube, for blocking the upper-side hole.
6. the cement according to any one of Claims 1 to 5 retains tubing string, it is characterised in that the water
Mud retaining devices also include：Limited location snap ring, spring connector, lower contact, wherein,
The inner central tube is inserted into the bottom of cement retaining devices and the spring connector is mounted, and
The spring connector is driven to be moved in the cement retaining devices；
The spring connector includes end and spring detent, and the end is in hollow cylindrical, the end
The lower surface in portion is inconsistent with the inwall of the lower contact, and the spring detent includes that interval same distance is set
The many point pawls on the end upper ring surface；
The limited location snap ring is fixed in the lower contact, the movement for limiting the spring detent.
7. the cement according to any one of Claims 1 to 5 retains tubing string, it is characterised in that
Offered on the outer wall of the exterior central tube annular groove, the inwall of the expansion packing element with it is described
The first side wall and the second sidewall sealing of groove both sides, so that the groove constitutes the inner chamber body.
8. cement according to claim 7 retains tubing string, it is characterised in that
Annular seal groove is offered on the first side wall, the seal groove connects with first feed pathway
It is logical；
The control unit is the y-type seal ring or V-shaped seal ring being arranged in the annular seal groove.
9. the cement according to Claims 1 to 5,8 any one retains tubing string, it is characterised in that
The control unit is ball-and-seat.
10. a kind of squeezing off instrument, it is characterised in that including as described in any one of claim 1~9
Cement retain tubing string and squeezing tubing string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510982812.5A CN106907127B (en) | 2015-12-23 | 2015-12-23 | Cement retains tubing string and squeezing off tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510982812.5A CN106907127B (en) | 2015-12-23 | 2015-12-23 | Cement retains tubing string and squeezing off tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907127A true CN106907127A (en) | 2017-06-30 |
| CN106907127B CN106907127B (en) | 2019-05-03 |
Family
ID=59207041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510982812.5A Active CN106907127B (en) | 2015-12-23 | 2015-12-23 | Cement retains tubing string and squeezing off tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106907127B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387018A (en) * | 2017-07-28 | 2017-11-24 | 四机赛瓦石油钻采设备有限公司 | A kind of one-trip string completes the instrument set with squeeze method construction of cement retainer |
| CN108979582A (en) * | 2018-08-31 | 2018-12-11 | 四川昆仑石油设备制造有限公司 | One kind is with brill blowout hookup |
| CN110500043A (en) * | 2019-08-23 | 2019-11-26 | 中国石油大学(北京) | Cementing system and casing joint |
| CN112228002A (en) * | 2020-09-09 | 2021-01-15 | 大庆康盛石油节能科技开发有限公司 | Plugging device for near wellbore zone of perforated oil layer |
| CN112682000A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Hydraulic setting tool for completing cement squeezing operation by one-trip pipe column |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2632306Y (en) * | 2003-07-10 | 2004-08-11 | 王文龙 | Double cylinder cleaning hole packer |
| CN201778747U (en) * | 2010-08-20 | 2011-03-30 | 中国石油天然气股份有限公司 | Controllable packer |
| CN202125275U (en) * | 2011-05-18 | 2012-01-25 | 中国石油化工集团公司 | Drilling-plug-free tool for top cementing of horizontal well sieve tube |
| CN202441295U (en) * | 2012-02-27 | 2012-09-19 | 中国石油天然气股份有限公司 | Safety relief device for pipe column |
| CN203626710U (en) * | 2013-12-10 | 2014-06-04 | 中国石油集团西部钻探工程有限公司 | Inwardly-pushing type packer |
| CN103835676A (en) * | 2013-11-07 | 2014-06-04 | 北京中煤矿山工程有限公司 | High-pressure grout stopping device for L-shaped drill hole ground pre-grouting |
| WO2014154480A1 (en) * | 2013-03-27 | 2014-10-02 | Saltel Industries | A device for controlling and isolating a tool in the form of an expansible sleeve for isolating areas in a well |
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN104695894A (en) * | 2015-02-28 | 2015-06-10 | 荆州市赛瑞能源技术有限公司 | Hydraulic detachable packer with sliding sleeve |
| CN204402420U (en) * | 2015-01-15 | 2015-06-17 | 青岛瑞信石油设备制造有限公司 | A kind of compression pilot sand-blast packer |
-
2015
- 2015-12-23 CN CN201510982812.5A patent/CN106907127B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2632306Y (en) * | 2003-07-10 | 2004-08-11 | 王文龙 | Double cylinder cleaning hole packer |
| CN201778747U (en) * | 2010-08-20 | 2011-03-30 | 中国石油天然气股份有限公司 | Controllable packer |
| CN202125275U (en) * | 2011-05-18 | 2012-01-25 | 中国石油化工集团公司 | Drilling-plug-free tool for top cementing of horizontal well sieve tube |
| CN202441295U (en) * | 2012-02-27 | 2012-09-19 | 中国石油天然气股份有限公司 | Safety relief device for pipe column |
| WO2014154480A1 (en) * | 2013-03-27 | 2014-10-02 | Saltel Industries | A device for controlling and isolating a tool in the form of an expansible sleeve for isolating areas in a well |
| CN103835676A (en) * | 2013-11-07 | 2014-06-04 | 北京中煤矿山工程有限公司 | High-pressure grout stopping device for L-shaped drill hole ground pre-grouting |
| CN104653145A (en) * | 2013-11-25 | 2015-05-27 | 天津大港油田钻采技术开发公司 | Long-rubber-barrel differential pressure type water filling packer capable of washing well |
| CN203626710U (en) * | 2013-12-10 | 2014-06-04 | 中国石油集团西部钻探工程有限公司 | Inwardly-pushing type packer |
| CN204402420U (en) * | 2015-01-15 | 2015-06-17 | 青岛瑞信石油设备制造有限公司 | A kind of compression pilot sand-blast packer |
| CN104695894A (en) * | 2015-02-28 | 2015-06-10 | 荆州市赛瑞能源技术有限公司 | Hydraulic detachable packer with sliding sleeve |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387018A (en) * | 2017-07-28 | 2017-11-24 | 四机赛瓦石油钻采设备有限公司 | A kind of one-trip string completes the instrument set with squeeze method construction of cement retainer |
| CN107387018B (en) * | 2017-07-28 | 2023-07-14 | 四机赛瓦石油钻采设备有限公司 | Tool for completing setting and cement extrusion construction of cement retainer by one-pass pipe column |
| CN108979582A (en) * | 2018-08-31 | 2018-12-11 | 四川昆仑石油设备制造有限公司 | One kind is with brill blowout hookup |
| CN110500043A (en) * | 2019-08-23 | 2019-11-26 | 中国石油大学(北京) | Cementing system and casing joint |
| CN112682000A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Hydraulic setting tool for completing cement squeezing operation by one-trip pipe column |
| CN112682000B (en) * | 2019-10-18 | 2022-09-23 | 中国石油化工股份有限公司 | Hydraulic setting tool for completing cement squeezing operation by one-trip pipe column |
| CN112228002A (en) * | 2020-09-09 | 2021-01-15 | 大庆康盛石油节能科技开发有限公司 | Plugging device for near wellbore zone of perforated oil layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106907127B (en) | 2019-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106907127A (en) | Cement retains tubing string and squeezing off instrument | |
| CN102071900B (en) | Custom-pressure expandable naked eye packer | |
| CN102695846B (en) | Process and apparatus to improve reliability of pinpoint stimulation operations | |
| RU2005113714A (en) | FINISHING A WELL FOR ONE DOWN OF A PUMP AND COMPRESSOR COLUMN | |
| US20050249613A1 (en) | Apparatus and method | |
| CN108119091B (en) | Well cementation and completion pipe string and method | |
| CN105484695A (en) | Mechanical hydraulic double-acting expansion device suitable for expansion tube drilling | |
| CN110821454B (en) | Downhole pulse generating device driven by oil pipe transmission and injection method | |
| US8479818B2 (en) | Method and apparatus to cement a perforated casing | |
| CN201883994U (en) | Self-pressure-retaining expansion open hole packer | |
| CN111794723B (en) | Side drilling small casing well cementation method | |
| CN202882841U (en) | Pipe external packer capable of being self-expandable when encountering water or oil | |
| CN104120997A (en) | Pipe column for horizontal well | |
| US20240060409A1 (en) | Methods of stimulating a hydrocarbon well | |
| US7980299B1 (en) | Horizontal well treating method | |
| CN203420698U (en) | Well completion fracture integrated pipe column for open hole horizontal well | |
| CN205382907U (en) | Two effect expansion devices of machinery hydraulic pressure suitable for expansion pipe well drilling | |
| DK201770608A1 (en) | System and method for controlling placement of a flowable material in a well with a low formation pressure | |
| CN205297515U (en) | Coiled tubing drags hydraulic jet fracturing device | |
| CN214944177U (en) | CO (carbon monoxide)2Oil well driving non-killing oil production pipe column | |
| CN110067541A (en) | The water filling of fractured-cavernous carbonate reservoir individual well is for oily method and device | |
| CN2758455Y (en) | Expanding tool of expandable pipe for use in petroleum engineering | |
| CN206309293U (en) | Sand control pipe | |
| CN203531867U (en) | Primary sand prevention letting-in tool and secondary resanding extruding and filling tool of primary sand prevention letting-in tool | |
| US2268010A (en) | Method of and means for cementing well formations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |