CN208456523U - Split type casing suspension device - Google Patents

Split type casing suspension device Download PDF

Info

Publication number
CN208456523U
CN208456523U CN201820883612.3U CN201820883612U CN208456523U CN 208456523 U CN208456523 U CN 208456523U CN 201820883612 U CN201820883612 U CN 201820883612U CN 208456523 U CN208456523 U CN 208456523U
Authority
CN
China
Prior art keywords
hanging
joint
hanging head
releasing
diameter section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201820883612.3U
Other languages
Chinese (zh)
Inventor
陈小元
秦春
周瑞强
陈金国
李根奎
顾克江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Sinopec East China Petroleum Engineering Corp
Original Assignee
Sinopec Oilfield Service Corp
Sinopec East China Petroleum Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sinopec Oilfield Service Corp, Sinopec East China Petroleum Engineering Corp filed Critical Sinopec Oilfield Service Corp
Priority to CN201820883612.3U priority Critical patent/CN208456523U/en
Application granted granted Critical
Publication of CN208456523U publication Critical patent/CN208456523U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to a kind of split type casing suspension devices, including hanging pup joint and hanging head, the upper end of hanging pup joint and the lower end of outer layer sleeve connect, box thread is equipped in the middle part of the inner hole of hanging pup joint, hangoff receptacle is screwed in hanging pup joint box thread, the lower end surface of hangoff receptacle is supported on the inner hole step of hanging pup joint;Hanging head includes the enlarged diameter section on top and the reduced diameter section of lower part, and the lower end surface of hanging head enlarged diameter section is pressed in the upper port of hangoff receptacle and is not able to rotate;Hanging head reduced diameter section lower end is connected with the upper end of inner layer sleeve;Hanging head centre bore upper end is screwed with releasing-joint by anti-pitch thread, and the upper end of releasing-joint is equipped with the taper box thread being mutually screwed on feeding drilling tool.The upper port of hangoff receptacle is uniformly provided with hangoff receptacle sawtooth, and the bottom stage face of hanging head enlarged diameter section is uniformly provided with hanging head sawtooth, and hanging head sawtooth is fastened on hangoff receptacle sawtooth.The casing suspension device is easy to assembly, at low cost, easily gives up, and does not increase cementing operation process.

Description

Split type casing suspension device
Technical field
The utility model relates to a kind of oil drilling utensil, in particular to a kind of split type casing suspension device belongs to stone Oily drilling equipment technical field.
Background technique
Topsoil basement rock below is got into after drilling well aperture, or is bored and reached certain depth, tripping in surface pipe.Surface pipe Effect has: top water-bearing layer is 1. isolated, does not make the surface water and surface layer Groundwater infiltration pit shaft;2. protecting well head, topsoil is reinforced The borehole wall of well section;3. installing preventer Prevention of blowout on surface pipe for continuing to bore down that high-pressure oil-gas layer can be encountered. When grout off, i.e. cementing is all used in gap between surface pipe and the borehole wall, cement slurry need to return out well head, ability Play the role of that stratum is isolated and protects the borehole wall.
The last layer casing in production casing well casing program, from well head always under to below the mined bed passed through. The depth of production casing tripping in is exactly the depth of drilling well substantially.The effect of production casing is oil gas, geothermal medium etc. to ground Channel completely cuts off exploitation medium and whole stratum, guarantees that the pressure of exploitation medium does not leak.Production casing is being transferred to production Afterwards, quality will guarantee to maintain certain exploitation time limit.The cementing quality of production casing directly affects the service life of well.
It is to save casing and well cementation cost during petroleum drilling operation, usually sets surface pipe casing program below It is calculated as tail tube hanging mode.In geothermal well drilling operation, using surface pipe as pump chamber, for the length and ruler for guaranteeing pump chamber Very little, usual production casing is not down toward well head, using hang well cementation sealing.
Existing casing suspension generallys use conventional oil well fluid pressure tailpiece hanger and simple casing sits bottom hang.It is conventional Oil well fluid pressure tailpiece hanger includes cone, fluid cylinder, piston, hanger body assembly, running tool, seal member, tieback Cylinder, rubber plug, ball seat etc., wherein hanger body assembly is made of parts such as slips, has the disadvantage in that (1) tool component is more, ties Structure is complicated;(2) tool cost is high;(3) operating technology is complicated, and there are casings to lose control of one's feelings, and is sent into drilling tool and does not open, mentions not The risks such as out.
Simple casing is sat after production casing is directly seated at shaft bottom by bottom suspension use and opens feeding drilling tool, production casing and table Suspension relationship is not present between layer casing;It has the disadvantage in that (1) casing sits bottom and easily causes lower parts casing pipe bending deformation;(2) casing Sit the non-tension of bottom upper back casing, it may occur however that do not open when being sent into drilling rod back-off, and upper sleeve screw thread is opened, cause nothing Method establishes completion interval of well cylinder.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, a kind of split type casing suspension is provided Device, structure is simple, easy to assembly, and cost is low, is sent into drilling tool back-off simply, easily gives up, do not increase cementing operation process.
In order to solve the above technical problems, a kind of split type casing suspension device of the utility model, including hanging pup joint and Hanging head, the upper end of the hanging pup joint and the lower end of outer layer sleeve connect, and suspension is equipped in the middle part of the inner hole of the hanging pup joint Pipe nipple box thread is screwed with hangoff receptacle in the hanging pup joint box thread, and the lower end surface of the hangoff receptacle is supported on the suspension On the inner hole step of pipe nipple;The hanging head includes the enlarged diameter section on top and the reduced diameter section of lower part, and the hanging head is straight greatly The lower end surface of diameter section is pressed in the upper port of the hangoff receptacle and is not able to rotate;The reduced diameter section lower end of the hanging head and internal layer The upper end of casing is connected;The centre bore upper end of the hanging head is screwed with releasing-joint by anti-pitch thread, and the release connects The upper end of head is equipped with the releasing-joint taper box thread being mutually screwed on feeding drilling tool, the hanging pup joint box thread and releasing-joint Taper box thread is positive pitch thread;The upper port of the hangoff receptacle is uniformly provided with hangoff receptacle sawtooth, the hanging head major diameter The bottom stage face of section is uniformly provided with hanging head sawtooth, and the hanging head sawtooth is fastened on the hangoff receptacle sawtooth.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that in use, the upper end of hanging pup joint passes through The connection of the lower end of tapered thread and outer layer sleeve;Inner layer sleeve is rotatably connected in hanging head lower end, feeding drilling tool is rotatably connected in release and connects In the releasing-joint taper box thread of head upper end, the above screw thread is positive pitch thread;When hanging head is seated at hanging in hanging pup joint When on hanging seat, well cementing operation is carried out, after well cementation, feeding drilling tool is rotated in the forward direction, due to being between releasing-joint and hanging head Anti- pitch thread connection, releasing-joint are screwed out from hanging head, that is, the upper end for realizing inner layer sleeve is suspended in outer layer sleeve, such as This eliminates the length of inner layer sleeve to well head.The split type casing suspension device of the utility model only needs four components mutual Connection, only hanging head is attached with releasing-joint by anti-pitch thread, and structure is simple, and processing cost is low;It rotates in the forward direction Very easily releasing-joint can be screwed out from hanging head, and other screw threads will not loosen.The tooth top of two sawtooth and tooth socket phase Mutually chimeric, how the peak contact of hanging head sawtooth arrives the tooth top of hangoff receptacle sawtooth, slightly rotate can smoothly fall it is chimeric;It is outstanding The cooperation of hanging head sawtooth and hangoff receptacle sawtooth can prevent hanging head from rotating, when rotating in the forward direction feeding drilling tool, it is ensured that hanging head is not Dynamic, releasing-joint is removed.
As the improvement of the utility model, releasing-joint light pipe segment is equipped with below the threaded connection section of the releasing-joint, The releasing-joint light pipe segment is plugged in the centre bore of the hanging head and by the hole wall of O-ring and hanging head centre bore reality Now seal.Good sealing between releasing-joint outer wall and hanging head inner wall may be implemented by O-ring.
The O-ring of releasing-joint light pipe segment periphery is equipped with twice as a further improvement of the utility model,.Setting Twice O-ring makes to seal relatively reliable.
The excircle of the hanging head enlarged diameter section, which is uniformly provided with, as a further improvement of the utility model, is recessed inwardly And vertically communicated guiding gutter.When setting of casing, mud can be flowed upwards out from guiding gutter, reduce the lower resistance bored.
The upper end of the hanging head enlarged diameter section is equipped with up big and down small loudspeaker as a further improvement of the utility model, Mouthful, the bell-mouthed lower end is connected to each other with the hanging head centre bore.After releasing-joint is laid down, under the centre bore of hanging head When drilling tool, horn mouth can play guiding role, smoothly drilling tool be guided to enter well.
Detailed description of the invention
Fig. 1 is the main view of the split type casing suspension device of the utility model.
Fig. 2 is the perspective view of hangoff receptacle in Fig. 1.
Fig. 3 is the perspective view of hanging head in Fig. 1.
In figure: 1. hanging pup joints;2. hangoff receptacle;2a. hangoff receptacle sawtooth;3. hanging head;3a. hanging head enlarged diameter section; 3a1. horn mouth;3a2. guiding gutter;3b. hanging head reduced diameter section;3c. hanging head sawtooth;4. releasing-joint;4a. releasing-joint Taper box thread;5.O type circle.
Specific embodiment
As shown in Figure 1 to Figure 3, the split type casing suspension device of the utility model includes hanging pup joint 1 and hanging head 3, The upper end of hanging pup joint 1 and the lower end of outer layer sleeve connect, and hanging pup joint box thread is equipped in the middle part of the inner hole of hanging pup joint 1, is hanged It hangs in pipe nipple box thread and is screwed with hangoff receptacle 2, the lower end surface of hangoff receptacle 2 is supported on the inner hole step of hanging pup joint 1;Hanging head 3 include the enlarged diameter section on top and the reduced diameter section of lower part, and the lower end surface of hanging head enlarged diameter section 3a is pressed in the upper end of hangoff receptacle 2 On mouth and it is not able to rotate;The hanging head lower end reduced diameter section 3b is connected with the upper end of inner layer sleeve;The centre bore upper end of hanging head 3 It is screwed with releasing-joint 4 by anti-pitch thread, the upper end of releasing-joint 4 is equipped with the releasing-joint taper being mutually screwed on feeding drilling tool Box thread 4a, hanging pup joint box thread and releasing-joint taper box thread 4a are positive pitch thread.
Releasing-joint light pipe segment is equipped with below the threaded connection section of releasing-joint 4, releasing-joint light pipe segment is plugged in suspension It is realized in first 3 centre bore and by the hole wall of O-ring 5 and hanging head centre bore and is sealed.Releasing-joint light pipe segment periphery it is O-shaped Circle 5 can be equipped with twice.Good sealing between 3 inner wall of 4 outer wall of releasing-joint and hanging head may be implemented by O-ring 5, if Set twice O-ring 5 make to seal it is relatively reliable.
The upper port of hangoff receptacle 2 is uniformly provided with hangoff receptacle sawtooth 2a, and the bottom stage face of hanging head enlarged diameter section 3a is uniform Equipped with hanging head sawtooth 3c, hanging head sawtooth 3c is fastened on hangoff receptacle sawtooth 2a.The tooth top of two sawtooth is mutually chimeric with tooth socket, How the peak contact of hanging head sawtooth 3c to hangoff receptacle sawtooth 2a tooth top, slightly rotation can smoothly fall it is chimeric;Suspension The cooperation of head saw tooth 3c and hangoff receptacle sawtooth 2a can prevent hanging head 3 from rotating, when rotating in the forward direction feeding drilling tool, it is ensured that suspension First 3 is motionless, and releasing-joint 4 is removed.
The excircle of hanging head enlarged diameter section 3a, which is uniformly provided with, to be recessed inwardly and vertically communicated guiding gutter 3a2.Setting of casing When, mud can be flowed upwards out from guiding gutter 3a2, reduce the lower resistance bored.
In use, the upper end of hanging pup joint 1 is connected by the lower end of tapered thread and outer layer sleeve;Inner layer sleeve is screwed on In 3 lower end of hanging head, it is sent into drilling tool and is rotatably connected in the releasing-joint taper box thread 4a of 4 upper end of releasing-joint, the above screw thread is equal Be positive pitch thread;When hanging head 3 is seated on the hangoff receptacle 2 in hanging pup joint 1, well cementing operation is carried out, it is positive after well cementation Rotation is sent into drilling tool, and due to being that anti-pitch thread connects between releasing-joint 4 and hanging head 3, releasing-joint 4 is revolved from hanging head 3 Out, that is, the upper end for realizing inner layer sleeve is suspended in outer layer sleeve, so eliminates the length of inner layer sleeve to well head.This reality Four components are only needed to be connected with each other with novel split type casing suspension device, only hanging head 3 passes through with releasing-joint 4 Anti- pitch thread is attached, and structure is simple, and processing cost is low;Rotating in the forward direction can be very easily by releasing-joint 4 from hanging head 3 Upper back-out, and other screw threads will not loosen.
The upper end of hanging head enlarged diameter section 3a is equipped with up big and down small horn mouth 3a1, the lower end of horn mouth 3a1 and hanging head Centre bore is connected to each other.After releasing-joint is laid down, from when drilling tool, horn mouth 3a1 can play guiding and make under the centre bore of hanging head 3 With smoothly guidance drilling tool enters well.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special Sign can realize that details are not described herein by or using the prior art.

Claims (5)

1. a kind of split type casing suspension device, including hanging pup joint and hanging head, the upper end of the hanging pup joint and outer layer jacket The lower end of pipe connects, it is characterised in that: hanging pup joint box thread, the hanging pup joint are equipped in the middle part of the inner hole of the hanging pup joint Hangoff receptacle is screwed in box thread, the lower end surface of the hangoff receptacle is supported on the inner hole step of the hanging pup joint;It is described outstanding Hanging head includes the enlarged diameter section on top and the reduced diameter section of lower part, and the lower end surface of the hanging head enlarged diameter section is pressed in the suspension In the upper port of seat and it is not able to rotate;The reduced diameter section lower end of the hanging head is connected with the upper end of inner layer sleeve;It is described outstanding The centre bore upper end of hanging head is screwed with releasing-joint by anti-pitch thread, and the upper end of the releasing-joint is equipped with and is sent into drilling tool phase The releasing-joint taper box thread being screwed on, the hanging pup joint box thread and releasing-joint taper box thread are positive pitch thread; The upper port of the hangoff receptacle is uniformly provided with hangoff receptacle sawtooth, and the bottom stage face of the hanging head enlarged diameter section is uniformly provided with outstanding Hanging head sawtooth, the hanging head sawtooth are fastened on the hangoff receptacle sawtooth.
2. split type casing suspension device according to claim 1, it is characterised in that: the threaded connection of the releasing-joint Section lower section is equipped with releasing-joint light pipe segment, and the releasing-joint light pipe segment is plugged in the centre bore of the hanging head and passes through O The hole wall of type circle and hanging head centre bore, which is realized, to be sealed.
3. split type casing suspension device according to claim 1, it is characterised in that: releasing-joint light pipe segment periphery O-ring be equipped with twice.
4. split type casing suspension device according to claim 1, it is characterised in that: outside the hanging head enlarged diameter section Even circumferential is equipped with and is recessed inwardly and vertically communicated guiding gutter.
5. split type casing suspension device according to any one of claim 1 to 4, it is characterised in that: the hanging head The upper end of enlarged diameter section is equipped with up big and down small horn mouth, and the bell-mouthed lower end is connected to each other with the hanging head centre bore.
CN201820883612.3U 2018-06-08 2018-06-08 Split type casing suspension device Active CN208456523U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820883612.3U CN208456523U (en) 2018-06-08 2018-06-08 Split type casing suspension device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820883612.3U CN208456523U (en) 2018-06-08 2018-06-08 Split type casing suspension device

Publications (1)

Publication Number Publication Date
CN208456523U true CN208456523U (en) 2019-02-01

Family

ID=65159722

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820883612.3U Active CN208456523U (en) 2018-06-08 2018-06-08 Split type casing suspension device

Country Status (1)

Country Link
CN (1) CN208456523U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111706269A (en) * 2020-06-30 2020-09-25 熊朝柱 Reducer and feeding method for feeding surface casing based on non-drilling time well cementation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111706269A (en) * 2020-06-30 2020-09-25 熊朝柱 Reducer and feeding method for feeding surface casing based on non-drilling time well cementation

Similar Documents

Publication Publication Date Title
US8789621B2 (en) Hydrocarbon well completion system and method of completing a hydrocarbon well
CN104141470B (en) The pore-forming molding method of underground coal mine fracturing borehole casing section
MX2007000872A (en) Methods and systems for cementing wells that lack surface casing.
NO308672B1 (en) Underwater wellhead assembly, as well as a method for overhauling an underwater well
CN105113978A (en) Single large-diameter reverse circulation air hammer capable of being used for large-size well hole drilling
CN208456523U (en) Split type casing suspension device
CN109723404A (en) Coal measure gas prospect pit naked eye device for plugging and method
US20070062693A1 (en) System, method, and apparatus for degassing tool for coal bed methane gas wells
CN106320983B (en) A kind of ultra-deep-water is with boring cased method and device
US4250966A (en) Insertion type cementing baffle
CN202165049U (en) Tube-inserting well cementation device
CN207813559U (en) The self-priming external packer of pipe of cement
CN101319604B (en) Inverse squeezing tie-back sealing plug
CN201196059Y (en) Oil well cementing system
CN203584359U (en) Asymmetric casing head for two-in-one drilling wellhead
CN201092845Y (en) Hydraulic pressure, double back-off hand type dragable bridge plug
CN108049816A (en) The narrow pressure window well four of deep water opens time Casing Program Design Method
CN109989725A (en) Exempt from brill formula blind plate and exempts to bore plug well shaft fixing technology
CN205089211U (en) Anti - circulating air of monomer major diameter hammer for oil and gas drilling
CN204703840U (en) Slotted pipe completion is with exempting to bore plug stage cementing device
RU2167273C1 (en) Method of casing liner installation in well
CN106761467B (en) A kind of integration connector and the deep water cementing method using integration connector implementation
CN105257235A (en) Rotary blowout preventer shell for large-size wellbore and shell connecting device
CN206429196U (en) A kind of ultra-deep-water is with the cased device of brill
CN106368630B (en) A kind of sand washing method and specific purpose tool

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant