CN102695844B

CN102695844B - For the stator of mud motor, its manufacture method and the mud motor including this stator

Info

Publication number: CN102695844B
Application number: CN201080060817.8A
Authority: CN
Inventors: H·阿克巴里; J·拉迈尔; O·辛特
Original assignee: Prad Research and Development Ltd
Current assignee: Prad Research and Development Ltd
Priority date: 2009-11-13
Filing date: 2010-09-30
Publication date: 2016-11-30
Anticipated expiration: 2030-09-30

Abstract

The present invention describes and manufactures the method for stator for mud motor, and the method includes providing and has a stator tube of inner surface and the inner surface to stator tube applies the step of binding agent.It addition, mandrel is positioned in stator tube, this mandrel have with needed for stator in geometric properties complementation outer geometric properties.Additionally, reinforcement material introduces in stator tube with the space filled between mandrel and the inner surface of stator tube and is subsequently cured to combine reinforcement material to the inner surface of stator tube.Then mandrel removes from the stator tube combined and reinforcement material, thus manufactures stator.

Description

For the stator of mud motor, its manufacture method and the down-hole including this stator Power drilling tool

Background of invention

Mud motor (downhole motor) (is generically referred to as " MTR (mud Motor) it is ") with rotary drill bit, the strong power generator that produces electric power etc. in drilling operation. As term " MTR " implies, MTR is generally by drilling fluid (drilling fluid) (example Such as mud) power is provided.This drilling fluid is also used for lubricating drill string and taking away drilling cuttings, and therefore Generally comprising particulate material such as borehole cuttings, this can shorten the use longevity of mud motor Life.Accordingly, there exist preparing mud motor and mud motor parts economically The demand of new way, it is quick-replaceable economic and the most at the scene.

Summary of the invention

The method that this invention relates generally to manufacture the stator for mud motor, wherein should Method includes providing the stator tube with inner surface；Apply adhesive to the interior of described stator tube On surface；Apotting spindle in described stator tube, this mandrel have with described stator needed in several The outer geometric properties of what feature complementary；Described to fill with introducing reinforcing materials in described stator tube The step in the space between mandrel and the inner surface of stator tube.It addition, solidification reinforcement material will be adding Strong material be attached on the inner surface of stator tube and then mandrel from the stator tube combined and armature Material removes thus manufactures stator.

According to an aspect of the present invention, stator tube comprise chosen from Fe, steel, high-speed steel, carbon steel, The material of wolfram steel, pyrite and copper.

It addition, can be monolayer binding agent or multi-layered bonded agent for manufacturing the binding agent of stator.

According to an aspect of the present invention, mandrel can comprise chosen from Fe, steel, high-speed steel, carbon The material of steel, wolfram steel, pyrite and copper.It addition, mandrel can be coated with and have various ways and (include Solid, semisolid or liquid) releasing agent (release agent).

The reinforcement material of the present invention can take various ways as understood by those skilled in the art. Such as reinforcement material can be composite.According to another aspect of the present invention, reinforcement material can To be polymer.According to a further aspect of the present invention, reinforcement material can be that thermosetting is moulded Material or thermoplastic.

As understood by those skilled in the art, the reinforcement material of one aspect of the present invention is permissible Selected from epoxy resin, polyimides, polyketone, polyether-ether-ketone (PEEK), phenolic resin and polyphenylene sulfide Ether (PPS).

It addition, reinforcement material can be various forms, including liquid, pastel, slurry, powder And/or particle form.Additionally, reinforcement material can be crosslinking and/or have high-crystallinity.Root According to the aspect of the present invention, when solidification reinforcement material to be attached to the interior table of stator tube by reinforcement material Time on face, various technology can be used.These technology can include, but not limited to use heat Solidification, radiation curing, steam cure and cooling.

Further requirement of the present invention protection is for the stator of mud motor, and this stator includes: Including the stator tube of inner surface and the reinforcement material of solidification that is attached on described inner surface, this is solid The reinforcement material changed has the inner surface limiting the internal helicoid chamber including multiple internal lobe.It addition, The present invention describes a kind of mud motor, and it includes that stator, wherein said stator include: Including the stator tube of inner surface and the reinforcement material of solidification that is attached on described inner surface, this is solid The reinforcement material changed has the inner surface limiting the internal helicoid chamber including multiple internal lobe；And accommodate Rotor in stator.According to the present invention, rotor can be with coating elastomer, wherein said elasticity Body can comprise selected from rubber, natural rubber (NR), synthetic polyisoprenes (IR), butyl rubber, The butyl rubber of halogenation, polybutadiene (BR), nitrile rubber, nitrile rubber (NBR), the fourth of hydrogenation Nitrile rubber (HNBR), the hydrogenated nitrile-butadiene rubber (XHNBR) of carboxylation, neoprene (CR), fluorine rubber One or more of glue (FKM) and Perfluoroelastomer (FFKM).

Accompanying drawing is sketched

For being more fully understood by inventive feature and required purpose, in conjunction with accompanying drawing carry out with Lower detailed description, the most similar reference represents the portion of correspondence in several views of the drawings all the time Part, and wherein:

Fig. 1 shows that the present invention may be used for well site therein (wellsite) system.

Fig. 2 A-2C shows that 1: 2 leaf that has according to an embodiment of the invention is distributed Moineau molded capacity formula (positive displacement) underground power drilling of (lobe profile) Tool.

Fig. 3 A-3F show according to an embodiment of the invention have 3: 4 leaves distribution Moineau molded capacity formula mud motor.

Figure 4 and 5 A-5D shows the side preparing stator according to an embodiment of the invention Method.

Fig. 6 and 7A-7D shows that the stator of preparing according to an embodiment of the invention inserts The method of thing.

Fig. 8 shows have determining of spline geometric properties according to an embodiment of the invention Son pipe and stator insert.

Fig. 9 shows the alternative method preparing stator according to an embodiment of the invention.

Detailed description of the invention

Embodiments of the present invention provide the stator for mud motor and stator insert, Its preparation method and the mud motor including this stator.The various embodiments of the present invention are permissible In wellsite system.

Wellsite system

Fig. 1 shows that the present invention may be used for wellsite system therein.This wellsite system can be land On or sea.In the system that this is exemplary, boring 11 is by rotating in known manner Hole and formed in subsurface formations (subsurface formations).Embodiments of the present invention are also Directional drilling can be used, as described below.

Drill string (drill string) 12 be suspended from boring 11 in and there is bottom hole assemblies (bottom hole Assembly) (BHA) 100 (it is included in the drill bit 105 of its lower end).Surface system include platform and Be positioned at boring 11 above headframe device 10, this device 10 include rotating disk 16, kelly bar 17, Suspension hook 18 and rotary swivel 19.Drill string 12 by being provided the rotating disk of energy by unshowned device 16 rotate, and rotating disk 16 engages with kelly bar 17 in the upper end of drill string.Drill string 12 is from being connected to trip Suspension hook 18 on fly block (the most not shown) hangs, through kelly bar 17 and rotary swivel 19 (its Drill string is allowed to rotate relative to suspension hook).As it is well known, top drive system can selectively be used.

In embodiment preferably, surface system farther includes to be stored in and is formed in well site Pit 27 in drilling fluid or mud 26.Pump 29 carries via the port in faucet 19 and bores Well liquid 26 is to the inside of drill string 12, so that drilling fluid is downward through drill string 12, such as orientation arrow Shown in 8.Drilling fluid discharges drill string 12 via the port in drill bit 15, and passes through drill string subsequently Annular region between outside and the wall of a borehole is circulated up, as shown in orienting arrow 9.With this public affairs The mode known, drilling fluid lubricating drill bit along with carrying rock when it returns to pit 27 with recirculation Bits (formation cuttings) are until surface.

The bottom hole assemblies 100 of shown embodiment includes well logging during (LWD) module 120, measurement while drilling (MWD) module 130, rotary steering system (roto-steerable system) and Motor and drill bit 105.

LWD module 120 is contained in the drill collar (drill collar) of specific type as known in the art In, and the logging tool (logging tool) of one or more known types can be comprised.Can also Understand, more than one LWD and/or MWD module can be used, such as, such as table at 120A Show.(in the text, the explanation to 120 position modules can also selectively refer to 120A position The module at place.) LWD module include for measure, process and storage information and for surface The ability of device talk.In the present embodiment, LWD module includes pressure gauge.

MWD module 130 is contained in the drill collar of specific type the most as known in the art, and The device of one or more characteristics for measuring drill string and drill bit can be comprised.MWD tool enters One step includes the equipment (not shown) for producing electric energy for downhole system.This generally can include by The mud turbine generator (also referred to as " MTR ") of drilling liquid flow energy supply, it will be understood that can To use other power and/or battery system.In the present embodiment, MWD module includes one Or multiple following kind of measurement apparatus: weight-on-bit measuring device, torque measuring device, vibration measurement Device, shock measurement device, stick slip measuring device (stick slip measuring device), direction Measurement apparatus and inclination measurement apparatus.

Here, the particularly advantageous purposes of this system is to turn to or " directed drilling " knot with controlled Close.In this embodiment, it is provided that rotary steering subsystem 150 (Fig. 1).Directed drilling is well The eye approach taked natural with it deviates wittingly.In other words, directed drilling be drill string turn to It is advanced along required direction.

Directed drilling is such as conducive to offshore drilling, because it makes it possible to bore many from single platform Well.Directed drilling also allows for by oil reservoirs horizontal drilling.Horizontal drilling makes the well can Passing through oil reservoirs longer length, this improves the productivity ratio of well.

Directional drilling system can be used for vertical drilling operation equally.Generally, due to being penetrated ground The power of the change that the uncertain character of layer or drill bit are stood, drill bit can be diverted away from plan Wellbore trace.When this deviation occurs, directional drilling system may be used to drill bit and returns to former road On line.

Known directional drilling methods includes using rotary steering system (" RSS ").In RSS, Drill string rotates from surface, and downhole hardware makes drill bit along required direction boring.Make drill string rotating Greatly reduce the situation that drill string stops and blocks in boring procedure.For creeping in ground The rotary steerable drilling system of the wellhole of changed course can usually be categorized as " pointing to drill bit (point-the-bit) " system or " backup drill bit (push-the-bit) " system.

Pointing in bit system, the rotary shaft of drill bit is along the general direction (general of new bore Direction) the local axle (local axis) of BHA is deviateed.This hole is according to by upper and lower stable The usual three point geometry shapes that device contact and drill bit limit extend.And between drill bit and lower regulator The drill bit shaft deflection angle that limited distance combines results in the non-collinear condition needed for curve.Exist And can be included in BHA near lower regulator to realize many modes of this purpose Point at stationary curved or the flexure of drill bit power transmission shaft that is distributed between upper and lower regulator.? In its preferable form, drill bit need not laterally cut, because drill bit shaft is along the direction of bent hole Rotate continuously.Point to drill bit type rotary steering system and their examples how to operate are described in United States Patent (USP) 6394193,6364034,6244361,6158529,6092610 and 5113953 Number and U.S. Patent Application Publication 2002/0011359 and No. 2001/0052428 in.

In backup drill bit type rotary steering system, usually not it is used for making drill bit shaft from bottom drill tool The specially appointed mechanism of combination local axle deviation.On the contrary, it is necessary to non-thread condition by making or In lower regulator arbitrary or both apply partially along the direction of the direction orientation preferentially extended relative to hole Mental and physical efforts or displacement and realize.Again, also exist and can wrap to realize many modes of this purpose Include non-rotating (relative to hole) eccentric stabilizer (approach based on displacement) and execute along required steering direction Afterburning eccentric actuators on drill bit.Again, it is diverted through in drill bit and at least two additionally Contact between produce non co-linearity and realize.In its preferable form, drill bit needs side cut Cut to produce the hole of bending.Backup type rotary steering system and their examples how to operate are described in United States Patent (USP) 6089332,5971085,5803185,5778992,5706905,5695015, 5685379、5673763、5603385、5582259、5553679、5553678、5520255 With in No. 5265682.

Mud motor

Referring now to Fig. 2 A-2C, depict Moineau molded capacity formula mud motor 200. Mud motor 200 includes the rotor 202 being contained in stator 204.Rotor 202 can be By the rigid material screw element that such as metal, resin, composite etc. are made.Stator 204 is permissible Have rectangular, spiral-shaped and can be by allowing rotor 202 along with fluid exists in stator 204 The elastomer flowed in the chamber 206 formed between rotor 202 and stator 204 and rotate is made.? In some embodiments, stator 204 is contained in and can partly limit stator 204 along with rotor 202 Rotate deformation and can protect the outside of stator 204 avoid abrasion stator tube 208 in.

Mud motor can manufacture with various configurations.Usually, when as shown in fig. 1b with When lateral cross section is observed, rotor 202 has n_rIndividual blade and stator 204 has n_sIndividual blade, its Middle n_s=n_r+1.Such as, Fig. 2 A-2C depicts the mud motor of the leaf distribution with 1: 2 200, its rotor 202 has a blade 210 and stator 204 has two blades 212.Figure 3A-3F depicts the mud motor 300 of the leaf distribution with 3: 4, and its rotor 302 has Three blades 310 and stator 304 has four blades 312.Other exemplary leaf distribution includes 5: 6,7: 8,9: 10 etc..

The rotation of rotor 302 is depicted in Fig. 3 C-3F.

Mud motor is further described in multiple open source literature, such as United States Patent (USP) 7442019、7396220、7192260、7093401、6827160、6543554、6543132、 6527512、6173794、5911284、5221197、5135059、4909337、4646856 With No. 2464011, U.S. Patent Application Publication 2009/0095528,2008/0190669 and No. 2002/0122722 and William C.Lyons etc.,Air&Gas Drilling Manual: Applications for Oil&Gas Recovery Wells&Geothermal Fluids Recovery Wells§ 11.2 (the 3rd edition 2009)；G.Robello Samuel,Downhole Drilling Tools: Theory&Practice for Engineers&Students288-333(2007)；Standard Handbook of Petroleum&Natural Gas Engineering 4-276-4-299(William C. Lyons&Gary J.Plisga eds.2006)；With 1Yakov A.Gelfgat etc.,Advanced Drilling Solutions:Lessons from the FSUIn 154-72 (2003).

The method producing stator

Now with reference to Fig. 4 in the background of Fig. 5 A-5D, it is provided that produce the method 400 of stator 500. For convenience of explanation and understand, Fig. 5 A-5D depicts the slices across without the degree of depth.

In step S402, it is provided that stator tube 502.As discussed in this article, stator tube 502 It can be rigid material.Such as, stator tube 502 can be by ferrum, steel, high-speed steel, carbon steel, tungsten Steel, pyrite, copper etc. are made.

The most in step s 404, the inner surface of stator tube 502 is prepared.Some embodiment party In formula, the stator insert of abrasion removes from stator tube 502.In other embodiments, stator The inner surface of pipe is cleaned, removes fat, sandblasting, shot-peening etc..

In step S406, binding agent 504 is applied on the inner surface of stator tube 502.Binding agent 504 can be monolayer binding agent or multi-layered bonded agent.It will be appreciated by the appropriately skilled person that and deposit At numerous suitable binding agents, include but not limited to epoxy resin, phenolic resin, polyester resin Or multiple suitable succedaneum.

In step S408, mandrel 506 is positioned in stator tube 502.Preferably, mandrel 506 In stator tube 502 placed in the middle so that the longitudinal axis of the longitudinal axis and stator tube 502 of mandrel 506. Mandrel 506 have with stator to be prepared 500 needed in the complementary outer geometry of geometric properties special Levy.Such as, mandrel 506 can have rectangular, spiral-shaped and have n_sIndividual blade is (such as, Embodiment shown in Fig. 5 A is four blades).

At some embodiments, mandrel 506 is coated with releasing agent (description) and is beneficial to removal of the mandrel 506.Additionally or alternatively, one or more elastic layers 508 can apply to (example in mandrel 506 As, on releasing agent) to strengthen stator 500.For clearly purpose, term reinforcement/elastic layer is at this It is used interchangeably in description.Such as, elastic layer 508 can be by elastomer such as rubber, natural rubber Glue (NR), synthetic polyisoprenes (IR), butyl rubber, the butyl rubber of halogenation, polybutadiene (BR), nitrile rubber, nitrile rubber (NBR), the nitrile rubber (HNBR) of hydrogenation, the hydrogenation of carboxylation Nitrile rubber (XHNBR), neoprene (CR) etc. are formed.In yet another implementation, Elastic layer 508 can be with fiber or fabric such as Nomex synthetic fibers (as can be from E.I.Du Pont De Nemours and Company, the KEVLAR that Wilmington, Delaware obtain Fiber) Strengthen.

In some embodiments, binding agent (description) is applied on elastic layer 508.Bonding Agent can be monolayer binding agent or multi-layered bonded agent.

In step S410, reinforcement material 510 introduces in stator tube 502.Suitably reinforcement material The example of 510 is discussed in this article.

In step S412, carrying out as discussed in this article solidifies reinforcement material 510.

In step S414, mandrel 506 removes from the stator 500 of solidification.

The method producing stator insert

Now with reference to Fig. 6 in the background of Fig. 7 A-7D, it is provided that the method producing stator insert 600.For convenience of explanation and understand, Fig. 7 A-7D depicts the slices across without the degree of depth.

In step S602, it is provided that mandrel 702.Mandrel 702 has inserts with stator to be prepared Enter the outer geometric properties that the required interior geometric properties of thing is complementary.Such as, mandrel 702 can have length Side, spiral-shaped and can have n_sIndividual blade is (such as, in the embodiment shown in Fig. 7 A It is four blades).

In step s 604, flexible sleeve 704 puts in mandrel 702.Flexible sleeve 704 It can be elastomer.Such as, elastomer can be rubber, natural rubber (NR), synthesize poly-isoamyl Diene (IR), butyl rubber, the butyl rubber of halogenation, polybutadiene (BR), nitrile rubber, butyronitrile Rubber (NBR), hydrogenation nitrile rubber (HNBR), the hydrogenated nitrile-butadiene rubber (XHNBR) of carboxylation, Neoprene (CR), fluorubber (TKM), Perfluoroelastomer (FFKM) etc..In yet another enforcement In mode, flexible sleeve 704 can use fiber or fabric such as Nomex synthetic fibers (as can be from E.I.Du Pont de Nemours and Company, Wilmington, Delaware obtain KEVLAR Fiber) strengthen.

In some embodiments, lubricant or releasing agent (such as, liquid, gel and/or powder) It is applied to be beneficial to the insertion of mandrel 702 between flexible sleeve 704 and mandrel 702 and remove.Excellent Selection of land, lubricant/release layer is compatible with mandrel 702 and flexible sleeve 704.Those skilled in the art Will be consequently realised that, this lubricant/release layer can take many forms, and includes but not limited to have admittedly Permanent or the semipermanent layer of body or fluid form.

Optionally, in step S606, between flexible sleeve and mandrel, apply vacuum so that soft The geometry of mandrel 702 preferably complied with by property sleeve pipe.In some embodiments, vacuum is not Need, because flexible material 704 complies with mandrel geometry without physical operations.

In step S608, flexible sleeve 704 and the mandrel 702 of assembling are placed in mould 706 In.Preferably, mandrel 702 is placed in the middle so that the longitudinal axis of mandrel 702 and mould in mould 706 The longitudinal axis of 706.In some embodiments, the interior geometric properties of mould 706 with moulded Stator insert will be installed on that stator tube 708 therein is complementary (to be deducted for binding agent 710, swollen Any tolerance of swollen, contraction etc.).Such as, stator insert can have almost circular foreign steamer Wide and stator tube 708 can have almost circular Internal periphery.

Depicted in figure 8 in another embodiment, stator tube 808 can have multiple spline 812 and stator insert 814 can include that the spline of multiple complementation is to provide stator insert 814 Machinery holding in stator tube 808.According an alternative embodiment, those skilled in the art are very Will readily recognize that the inner and outer wall of stator tube is not inevitable the most parallel.

In step S610, reinforcement material 714 introduces in mould.Suitably reinforcement material 714 Example discuss in this article.

Optionally, releasing agent and/or lubricant can be applied to mould before introducing reinforcement material 714 Stator insert the removing from mould 706 of solidification it is beneficial on the inner surface of tool.

Additionally or alternatively, binding agent (description) can be answered before introducing reinforcement material 714 The combination of reinforcement material 714 and flexible sleeve 704 it is beneficial on flexible sleeve 704.

In step S612, reinforcement material 714 solidifies as discussed herein.

In step S614, the reinforcement material 714 of solidification and flexible sleeve 704 are from mould 706 Remove.In some embodiments, the outer surface of the stator insert of solidification carry out processing in order to In being preferably combined with stator tube 708.Such as, the stator insert of solidification can be cleaned, Remove fat, sandblasting, shot-peening etc..

In step S616, mandrel 702 optionally (step in stator inserts stator tube 708 S618) before, the stator insert from solidification removes.In another embodiment, mandrel 702 After inserting stator tube 708, the stator insert from solidification removes.

Multiple technologies may be used for the stator insert preparing stator tube 708 to accommodate solidification.? In some embodiments, the stator insert of abrasion removes from stator tube 708.Implement at other In mode, the inner surface of stator tube 708 is cleaned, removes fat, sandblasting, shot-peening etc..

In some embodiments, stator insert is combined with the inner surface of stator tube 708.Fixed Sub-insert can be combined with stator tube 708 with binding agent 710.Such as, binding agent 710 can To be applied to outside and/or the inner side of stator tube 708 of stator insert.Or, insert at stator Entering after thing inserts, binding agent 710 can be at stator insert and fixed under stress or under vacuum Flow into or inject between sub-pipe 708.Multiple binding agent 710 can be used, including epoxy resin, Binding agent of poly-(methyl methacrylate), polyurethane-base etc..

Reinforcement material and curing

Reinforcement material 510,714 described herein can be multiple material, including composite wood Material, polymer, thermosetting plastics, thermoplastic etc..Exemplary polymer includes ring Epoxy resins, polyimides, polyketone, polyether-ether-ketone (PEEK), phenolic resin, polyphenylene sulfide (PPS) Etc..Reinforcement material 510,714 can introduce in a variety of forms, including liquid, pastel, Slurry, powder, particle form etc..According to the aspect of the present invention, reinforcement material can include, But it is not limited to numerous liquid, pastel or the powder that can solidify.A side according to the present invention Face, they can be pottery or cement.

Reinforcement material 510,714 can be crosslinking, additionally or alternatively, reinforcement material 510,714 can have high-crystallinity.

Reinforcement material 510, the solidification of 714 can be completed by multiple technologies, add including chemistry Add agent, ultraviolet radiation, electron beam, heat, be exposed to part or full microwave spectrum, steam cure, Cooling etc..Solidification process can change between 714 at specific reinforcement material 510, but Can be determined by the description of manufacturer and the general principles of chemistry.In some embodiments, Reinforcement material 510,714 solidify to promote and elastic layer 508 or flexible sleeve 704 under stress Combination and/or improve mechanical performance, thus elastic layer 508 or flexible sleeve 704 are pressed to the heart Axle 506, the geometry of 702 and improve reinforcement material 510, the mechanical performance of 714.Such as, Experiment discloses, when reinforcement material solidifies under stress, and T_g, hardness and toughness have about 20% Raising.

Prepare the other method of stator

Now with reference to Fig. 9 under the background of Fig. 5 A-5D, it is provided that the method preparing stator 500 900.For convenience of description and understand, Fig. 5 A-5D depicts the slices across without the degree of depth.

In step S902, it is provided that mandrel 506.Mandrel 506 can have and for stator The outer geometric properties that the required interior geometric properties of 500 is complementary.Such as, mandrel 506 can have Rectangular, spiral-shaped and there is n_sIndividual blade is (such as, in the embodiment shown in Fig. 5 A It is four blades).

Optionally, in step S904, mandrel 506 can coat releasing agent (description) in order to In mandrel 506 removing from flexible sleeve 508.

In step S906, flexible sleeve 508 is applied in mandrel 506.Flexible sleeve 508 Can be formed by elastomer, such as rubber, natural rubber (NR), synthetic polyisoprenes (IR), fourth Base rubber, the butyl rubber of halogenation, polybutadiene (BR), nitrile rubber, nitrile rubber (NBR), The nitrile rubber (HNBR) of hydrogenation, the hydrogenated nitrile-butadiene rubber (XHNBR) of carboxylation, neoprene (CR), fluorubber (FKM) and Perfluoroelastomer (FFKM) etc..In yet another embodiment, Flexible sleeve 508 can be strengthened with fiber or fabric, if Nomex synthetic fibers are (as can be from E.I. Du Pont de Nemours and Company, Wilmington, Delaware obtain KEVLAR Fiber).

Optionally, in step S908, binding agent (description) is applied to flexible sleeve 508 On outer surface.Binding agent can be monolayer binding agent or multi-layered bonded agent.

In step S910, it is provided that stator tube 502.As discussed in this article, stator tube 502 can be rigid material.Such as, stator tube 502 can be by ferrum, steel, high-speed steel, carbon Steel, wolfram steel, pyrite, copper etc. are made.

Optionally, in step S912, it is prepared for the inner surface of stator tube 502.At some In embodiment, the stator insert of abrasion removes from stator tube 502.At other embodiment In, the inner surface of stator tube 502 is cleaned, removes fat, sandblasting, shot-peening etc..

In step S914, binding agent 504 is applied to the inner surface of stator tube 502.Bonding Agent 504 can be monolayer binding agent or multi-layered bonded agent.According to the present invention, it is possible to use multiple Binding agent, includes but not limited to Hunstman CW47/HY33 or Chemosil 310.In step In rapid S916, flexible sleeve 508 and mandrel 506 are positioned in stator tube 502.Preferably, Mandrel 506 and flexible sleeve 508 are placed in the middle so that the longitudinal axis of mandrel 506 in stator tube 502 Longitudinal axis with stator tube 502.

In step S918, reinforcement material 510 introduces with filling flexible sleeve pipe 508 and stator Space between 502.The suitably example of reinforcement material 510 is discussed in this article.

In step S920, reinforcement material 510 solidification as discussed in this article.

Optionally, in step S922, mandrel 506 removes from stator 500.

By quoting introducing

The all patents shown herein, disclosed patent application and other list of references are bright at this Really by quoting with its introducing in full.

Equivalent

It will be appreciated by the appropriately skilled person that or institute herein can be determined merely with normal experiment Many equivalents of the particular implementation of the present invention described.This kind of equivalent is intended to be included in down In the range of the claim in face.

Claims

1. the method manufacturing the stator for mud motor, the method includes:

Mandrel applies flexible sleeve；

Position described mandrel in mould, this mandrel have with described stator needed in geometric properties Complementary outer geometric properties；

Introduce reinforcing materials in described mould with fill described mandrel and described mould inner surface it Between space；

Solidify described reinforcement material；

The reinforcement material of described solidification and described flexible sleeve is removed from described mould；

Reinforcement material and the described flexible sleeve of described solidification are inserted in stator tube；

Binding agent is utilized to make the reinforcement material of described solidification be combined with described stator tube；With

Described mandrel is removed from the stator tube combined and reinforcement material；

Thus manufacture described stator.

2. the process of claim 1 wherein that described stator tube comprises the material of chosen from Fe, steel and copper Material.

3. the process of claim 1 wherein described stator tube comprise high-speed steel, carbon steel, wolfram steel, Pyrite or a combination thereof.

4. the process of claim 1 wherein that described binding agent is monolayer binding agent.

5. the process of claim 1 wherein that described binding agent is multi-layered bonded agent.

6. the process of claim 1 wherein that described mandrel comprises the material of chosen from Fe, steel and copper.

7. the process of claim 1 wherein that described mandrel comprises high-speed steel, carbon steel, wolfram steel, Huang Copper or a combination thereof.

8. the process of claim 1 wherein that described mandrel is coated with releasing agent.

9. the process of claim 1 wherein that described reinforcement material is composite.

10. the process of claim 1 wherein that described reinforcement material is polymer.

11. the process of claim 1 wherein that described reinforcement material is thermosetting plastics.

12. the process of claim 1 wherein that described reinforcement material is thermoplastic.

The method of 13. claim 10, wherein said reinforcement material comprise selected from epoxy resin, Polyimides, polyketone, polyether-ether-ketone (PEEK), phenolic resin and the one of polyphenylene sulfide (PPS) Or it is multiple.

14. the process of claim 1 wherein described reinforcement material for selected from liquid, slurry and The form of grain.

15. the process of claim 1 wherein that described reinforcement material is selected from pastel and slurry Form.

16. the process of claim 1 wherein that described reinforcement material is crosslinking.

17. the process of claim 1 wherein that described reinforcement material has high-crystallinity.

18. the process of claim 1 wherein that the described reinforcement material of solidification farther includes to be selected from One or more technology of heat cure, radiation curing, steam cure and cooling.

19. stators being used for mud motor, this stator includes:

Including the stator tube of inner surface, described stator tube has and multiple inwardly prolongs from described inner surface The spline stretched；

The stator insert formed by the reinforcement material solidified, the reinforcement material of this solidification is positioned at In described inner surface and arranging along the plurality of spline, described stator insert has restriction and includes The inner surface in the internal helicoid chamber of multiple internal lobes and treated outer surface, described treated outside Surface presents the surface promoting to engage with described stator tube；

Binding agent, its outer surface being positioned at described stator insert and the interior table of described stator tube Further described stator insert is fixed in described stator tube between face；With

Flexible sleeve, it is connected to the armature of described solidification along the scope of the plurality of internal lobe Material.

20. 1 kinds of mud motors, including:

Stator, comprising:

Including the stator tube of inner surface, described stator tube has multiple inside from described inner surface The spline extended；With

The stator insert formed by the reinforcement material solidified, the reinforcement material location of this solidification Arranging in described inner surface and along the plurality of spline, described stator insert has restriction bag Include the inner surface in the internal helicoid chamber of multiple internal lobe and treated outer surface, described treated Outer surface presents the surface promoting to engage with described stator tube；

Binding agent, its outer surface being positioned at described stator insert and described stator tube interior Further described stator insert is fixed in described stator tube between surface；And

It is contained in the rotor in described stator.

The mud motor of 21. claim 20, wherein said rotor is coated with elastomer.

The mud motor of 22. claim 21, wherein said elastomer comprises rubber.

The mud motor of 23. claim 21, wherein said elastomer comprises perfluorinated elastomer Body (FFKM).

The mud motor of 24. claim 21, wherein said elastomer comprises selected from natural Rubber (NR), synthetic polyisoprenes (IR), butyl rubber, polybutadiene (BR), nitrile rubber, One or more of neoprene (CR) and fluorubber (FKM).

The mud motor of 25. claim 21, wherein said elastomer comprises selected from halogenation Butyl rubber, nitrile rubber (NBR), hydrogenation nitrile rubber (HNBR) and the hydrogenation of carboxylation One or more of nitrile rubber (XHNBR).