CN110056309B - Fixed-shaft rotary positive displacement power tool - Google Patents

Fixed-shaft rotary positive displacement power tool Download PDF

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CN110056309B
CN110056309B CN201910386992.9A CN201910386992A CN110056309B CN 110056309 B CN110056309 B CN 110056309B CN 201910386992 A CN201910386992 A CN 201910386992A CN 110056309 B CN110056309 B CN 110056309B
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sleeve
bearing
rotor
eccentric
eccentric bearing
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CN110056309A (en
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叶哲伟
冯康
谭浪
程成
刘志杨
李安乐
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Southwest Petroleum University
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00Drives for drilling, used in the borehole
    • E21B4/02Fluid rotary type drives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03CPOSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C2/00Rotary-piston engines
    • F03C2/08Rotary-piston engines of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00Sliding-contact bearings for exclusively rotary movement
    • F16C17/12Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2352/00Apparatus for drilling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sliding-Contact Bearings (AREA)
  • Hydraulic Motors (AREA)

Abstract

本发明为定轴旋转容积式动力工具,包括外筒、内转子、外转子、止动环、止动环套、孔用卡簧、TC轴承外套、上TC轴承内套、下TC轴承内套、偏心轴承内套、偏心轴承外套组成;外筒上端接钻柱;内转子通过螺旋齿内啮合安装在外转子内并与外转子形成至少一个的共轭封闭腔,内转子的连续转动能导致共轭密封腔连续延轴向下移以保证工作介质(钻井液)循序向下推进;内转子上下两端设有偏心轴承,偏心轴承由偏心轴承内套和偏心轴承外套组成,偏心轴承偏心距等于内转子与外转子的中心距;外转子上部和下部均设有TC轴承;本发明可用作井下动力工具,装设在偏心轴承中的内转子在液压的作用下做定轴转动为井下工具组合提供旋转动力,消除了离心力带来的负面影响。

Figure 201910386992

The present invention is a fixed-axis rotating positive displacement power tool, including an outer cylinder, an inner rotor, an outer rotor, a stop ring, a stop ring sleeve, a circlip for a hole, a TC bearing outer sleeve, an upper TC bearing inner sleeve, and a lower TC bearing inner sleeve , eccentric bearing inner sleeve and eccentric bearing outer sleeve; the upper end of the outer cylinder is connected to the drill string; the inner rotor is installed in the outer rotor through the internal meshing of the helical teeth and forms at least one conjugated closed cavity with the outer rotor. The yoke seal chamber moves down continuously along the axial direction to ensure that the working medium (drilling fluid) moves downward in sequence; the upper and lower ends of the inner rotor are provided with eccentric bearings. The eccentric bearings are composed of an eccentric bearing inner sleeve and an eccentric bearing outer sleeve. The center distance between the inner rotor and the outer rotor; the upper and lower parts of the outer rotor are provided with TC bearings; the invention can be used as a downhole power tool, and the inner rotor installed in the eccentric bearing rotates as a downhole tool under the action of hydraulic pressure. The combination provides rotational power, eliminating the negative effects of centrifugal force.

Figure 201910386992

Description

定轴旋转容积式动力工具Fixed axis rotary positive displacement power tools

技术领域technical field

本发明涉及一种石油天然气行业钻井工程技术领域,特别是一种井下动力工具。The invention relates to the technical field of drilling engineering in the petroleum and natural gas industry, in particular to an underground power tool.

背景技术Background technique

目前国内外应用于油气井井下动力钻具主要有:螺杆钻具、涡轮钻具、电动钻具等。各类钻具在国内外的研究以及应用情况均有所不同,此外各类钻具所具有的优势和短板也不尽相同,如螺杆钻具工作扭矩与压降和结构有关而与转速无关,但有横向振动;涡轮钻具虽具有高速大扭矩的软特性,且无横向振动等优点,但输出转速过高、整机尺寸过长等缺点;电动钻具的输出转速较高,多级减速器结构复杂,可靠性差,井下电动机的绝缘和密封性能要求高。为了解决以上问题,特此提出定轴旋转容积式动力工具,保留上述大部分有点的同时以解决上述技术的缺陷。At present, the power drilling tools used in oil and gas wells at home and abroad mainly include: screw drilling tools, turbo drilling tools, electric drilling tools, etc. The research and application of various drilling tools at home and abroad are different. In addition, the advantages and disadvantages of various drilling tools are also different. For example, the working torque of screw drilling tools is related to pressure drop and structure but not to speed. , but there is lateral vibration; although the turbo drilling tool has the soft characteristics of high speed and large torque, and has no advantages such as lateral vibration, but the output speed is too high and the size of the whole machine is too long; the output speed of the electric drilling tool is high, and the multi-stage The reducer has a complex structure, poor reliability, and high requirements for the insulation and sealing performance of the underground motor. In order to solve the above problems, a fixed-axis rotary positive displacement power tool is hereby proposed to solve the shortcomings of the above-mentioned technologies while retaining most of the above-mentioned advantages.

发明内容SUMMARY OF THE INVENTION

本发明提供定轴旋转容积式动力工具,以解决现有技术中的井下动力工具所存在横向震动的问题。The present invention provides a fixed-axis rotary positive displacement power tool to solve the problem of lateral vibration of the downhole power tool in the prior art.

为了解决上述问题,根据本发明的一个方面,本发明提供了定轴旋转容积式动力工具,包括外筒、外转子、内转子、止动环、止动环套、孔用卡簧、TC轴承外套、上TC轴承内套、下TC轴承内套、偏心轴承内套、偏心轴承外套组成;外筒上端接钻柱;内转子通过螺旋齿内啮合安装在外转子内并与外转子形成至少一个的共轭封闭腔来容纳工作介质(钻井液),内转子的连续转动能导致共轭密封腔连续延轴向下移以保证工作介质(钻井液)循序向下推进;内转子上下两端设有偏心轴承,偏心轴承由偏心轴承内套和偏心轴承外套组成,偏心轴承偏心距等于内转子与外转子的中心距;外转子上部和下部分别设有上TC轴承和下TC轴承。In order to solve the above problems, according to one aspect of the present invention, the present invention provides a fixed-axis rotary positive displacement power tool, comprising an outer cylinder, an outer rotor, an inner rotor, a snap ring, a snap ring sleeve, a circlip for a hole, and a TC bearing The outer sleeve, the upper TC bearing inner sleeve, the lower TC bearing inner sleeve, the eccentric bearing inner sleeve, and the eccentric bearing outer sleeve are composed; the upper end of the outer cylinder is connected to the drill string; Conjugate closed cavity to accommodate the working medium (drilling fluid), the continuous rotation of the inner rotor can cause the conjugated sealed cavity to move down continuously along the axial direction to ensure that the working medium (drilling fluid) advances in sequence; the upper and lower ends of the inner rotor are provided with Eccentric bearing, eccentric bearing consists of eccentric bearing inner sleeve and eccentric bearing outer sleeve, eccentric bearing eccentric distance is equal to the center distance between inner rotor and outer rotor; upper TC bearing and lower TC bearing are respectively provided on the upper and lower parts of outer rotor.

进一步,所述外筒上部和下部均设置有锥形内螺纹,所述外筒上部和下部的内腔均设有卡簧槽,上部卡簧槽下方有止动环槽,下部卡簧槽上方有止动环槽,在止动环槽和卡簧槽之间设置有与止动环一侧的小凸台相配的凹槽,防止偏心轴承外套转动。Further, the upper part and the lower part of the outer cylinder are provided with conical internal threads, the inner cavity of the upper part and the lower part of the outer cylinder is provided with a retaining ring groove, the upper retaining ring groove is below the retaining ring groove, and the lower retaining ring groove is above the lower retaining ring groove. There is a retaining ring groove, and a groove matching the small boss on one side of the retaining ring is arranged between the retaining ring groove and the retaining ring groove to prevent the eccentric bearing housing from rotating.

进一步,所述内转子上部和下部均设有中心孔,所述内转子上部和下部在中心孔处均设有至少一个通流孔;所述内转子中间为螺杆结构;所述内转子上端设有内六角结构;所述内转子下端设有螺纹,螺纹上部设有锥形面。Further, the upper and lower parts of the inner rotor are provided with a central hole, and the upper and lower parts of the inner rotor are both provided with at least one through-flow hole at the central hole; the middle of the inner rotor is a screw structure; the upper end of the inner rotor is provided with The inner hexagonal structure is provided; the lower end of the inner rotor is provided with a thread, and the upper part of the thread is provided with a conical surface.

采用上述进一步技术方案的有益效果是:所述内转子中心孔与通流孔可实现对钻井液的导流,螺纹上部锥形面可以保证与下端连接件的同轴度,所述内转子上端的内六角结构便于扳手将内转子旋入外转子内部。The beneficial effects of adopting the above-mentioned further technical solutions are: the center hole and the through hole of the inner rotor can guide the drilling fluid, the conical surface on the upper part of the thread can ensure the coaxiality with the lower end connecting piece, and the upper end of the inner rotor can be concentric. The inner hexagon structure is convenient for the wrench to screw the inner rotor into the outer rotor.

进一步,所述外转子为轴套型结构,所述外转子上端内部设有定位台阶和内螺纹,下端外部设有定位台阶和外螺纹;所述外转子内部通过注胶工艺成型有与内转子相配合的螺杆曲面结构。Further, the outer rotor is a shaft sleeve type structure, the upper end of the outer rotor is provided with a positioning step and an inner thread, and the lower end is provided with a positioning step and an outer thread; the outer rotor is formed with the inner rotor through the glue injection process. Matching screw surface structure.

采用上述进一步技术方案的有益效果是:外转子可以在狭窄的径向空间内实现上下端的轴向定位和装配TC轴承,从而保证外转子的定轴转动;外转子与内转子做齿轮内啮合的定轴转动。The beneficial effects of the above-mentioned further technical solutions are: the outer rotor can realize the axial positioning of the upper and lower ends and assemble the TC bearings in a narrow radial space, thereby ensuring the rotation of the fixed axis of the outer rotor; Fixed axis rotation.

进一步,所述偏心轴承外套一端烧结有硬质合金环,另一端设有两个等宽凹槽;所述偏心轴承外套中部设有与外径偏心的通孔,其通孔内烧结有硬质合金套;所述偏心轴承外套烧结有硬质合金环的一端设有台阶;所述偏心轴承外套设有若干通流孔;所述偏心轴承内套为轴套型结构,其外部烧结有硬质合金套;所述偏心轴承内套和偏心轴承外套组成为偏心轴承,偏心轴承的偏心距等于内转子与外转子的中心距。Further, one end of the eccentric bearing shell is sintered with a cemented carbide ring, and the other end is provided with two equal-width grooves; the middle of the eccentric bearing shell is provided with a through hole eccentric to the outer diameter, and a hard alloy ring is sintered in the through hole. alloy sleeve; one end of the eccentric bearing outer sleeve sintered with a cemented carbide ring is provided with steps; the eccentric bearing outer sleeve is provided with a number of through-flow holes; Alloy sleeve; the eccentric bearing inner sleeve and the eccentric bearing outer sleeve form an eccentric bearing, and the eccentric distance of the eccentric bearing is equal to the center distance between the inner rotor and the outer rotor.

采用上述进一步技术方案的有益效果是:偏心轴承外套一端烧结的硬质合金环与上TC轴承内套上端部所烧结的硬质合金环相配合起到了对外转子转动过程中轴向力的承受;偏心轴承外套另一端两个对称等宽凹槽在止动环的作用下可以限制偏心轴承外套的转动;偏心轴承内套与偏心轴承外套所烧结的硬质合金套可以在恶劣的井下环境起到轴承的作用。The beneficial effects of adopting the above-mentioned further technical solutions are: the sintered cemented carbide ring at one end of the outer casing of the eccentric bearing cooperates with the cemented carbide ring sintered at the upper end of the inner sleeve of the upper TC bearing to bear the axial force during the rotation of the outer rotor; The two symmetrical equal-width grooves at the other end of the eccentric bearing shell can limit the rotation of the eccentric bearing shell under the action of the stop ring; the cemented carbide sleeve sintered between the eccentric bearing inner sleeve and the eccentric bearing shell can play a role in the harsh underground environment. The role of bearings.

进一步,所述上TC轴承内套为轴套型结构,其上部烧结有硬质合金套,中间外部设有定位台阶,下端设有外螺纹;所述上TC轴承内套上端烧结有硬质合金环;上TC轴承内套下端与外转子上端通过螺纹连接,上TC轴承内套上部与TC轴承外套相配合形成上TC轴承。Further, the upper TC bearing inner sleeve is a shaft sleeve type structure, the upper part of which is sintered with a cemented carbide sleeve, a positioning step is arranged outside the middle, and an external thread is arranged at the lower end; the upper end of the upper TC bearing inner sleeve is sintered with cemented carbide Ring; the lower end of the inner sleeve of the upper TC bearing is connected with the upper end of the outer rotor by threads, and the upper part of the inner sleeve of the upper TC bearing is matched with the outer sleeve of the TC bearing to form the upper TC bearing.

进一步,所述下TC轴承内套为轴套型结构,其下部烧结有硬质合金套,下端内部设有螺纹;所述上TC轴承内套下端烧结有硬质合金环;下TC轴承内套与外转子下端通过螺纹连接,下TC轴承内套下部与TC轴承外套相配合形成下TC轴承。Further, the lower TC bearing inner sleeve is a shaft sleeve type structure, the lower part of which is sintered with a cemented carbide sleeve, and the lower end is provided with threads; the lower end of the upper TC bearing inner sleeve is sintered with a cemented carbide ring; the lower TC bearing inner sleeve is sintered with a cemented carbide ring; It is connected with the lower end of the outer rotor through threads, and the lower part of the inner sleeve of the lower TC bearing is matched with the outer sleeve of the TC bearing to form the lower TC bearing.

采用上述进一步技术方案的有益效果是:上TC轴承内套与TC轴承外套配合形成耐磨的上TC轴承;下TC轴承内套与TC轴承外套配合形成耐磨的下TC轴承,有效保证了外转子的定轴转动。The beneficial effects of adopting the above-mentioned further technical solutions are: the upper TC bearing inner sleeve cooperates with the TC bearing outer sleeve to form a wear-resistant upper TC bearing; the lower TC bearing inner sleeve cooperates with the TC bearing outer sleeve to form a wear-resistant lower TC bearing, effectively ensuring the external The fixed axis of the rotor rotates.

本发明的有益效果是:The beneficial effects of the present invention are:

本发明可直接用在钻具组合,外筒上下端连接在井下钻具组合中;与外壳轴线偏心的内转子和与外筒轴线同心的外转子在钻井液压力的作用下分别做定轴转动,内转子通过内转子下端螺纹将动力传递给下端;所述定轴旋转容积式动力工具的转速只与排量和结构有关,与其工况(钻压、扭矩等)无关;工作扭矩与压降和结构有关而与转速无关;其克服了涡轮钻具转速高、扭矩小的缺点,有着低转速、大扭矩特性,特别适合于钻井作业,尤其所述定轴旋转容积式动力工具定轴转动消除了常规螺杆马达带来的横向振动,减少了因为转子横向振动带来的负面影响,增加了橡胶的寿命,提高钻井作业效率。The invention can be directly used in the drilling tool assembly, and the upper and lower ends of the outer cylinder are connected in the downhole drilling tool assembly; the inner rotor eccentric to the axis of the casing and the outer rotor concentric to the axis of the outer cylinder are respectively rotated on fixed axes under the action of the drilling fluid pressure. , the inner rotor transmits power to the lower end through the thread at the lower end of the inner rotor; the rotational speed of the fixed-axis rotating positive displacement power tool is only related to the displacement and structure, and has nothing to do with its working conditions (weight on bit, torque, etc.); working torque and pressure drop It is related to the structure and has nothing to do with the rotation speed; it overcomes the shortcomings of high rotation speed and low torque of the turbo drilling tool, and has the characteristics of low rotation speed and large torque, and is especially suitable for drilling operations, especially the fixed-axis rotary positive displacement power tool. It reduces the lateral vibration caused by the conventional screw motor, reduces the negative impact caused by the lateral vibration of the rotor, increases the life of the rubber, and improves the drilling efficiency.

附图说明Description of drawings

构成本申请的一部分的说明书附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

附图1为本发明定轴旋转容积式动力工具的剖面结构图。1 is a cross-sectional structural diagram of a fixed-axis rotary positive displacement power tool of the present invention.

附图2为附图1中A-A方向的剖面图。FIG. 2 is a cross-sectional view along the A-A direction in FIG. 1 .

附图3为附图1中B-B方向的剖面图。FIG. 3 is a cross-sectional view along the B-B direction in FIG. 1 .

附图4为本发明中偏心轴承的剖面结构图。FIG. 4 is a cross-sectional structural view of the eccentric bearing in the present invention.

附图5为本发明中偏心轴承的结构示意图。FIG. 5 is a schematic view of the structure of the eccentric bearing in the present invention.

附图6为本发明中上TC轴承的剖面结构图。6 is a cross-sectional structural view of the upper TC bearing in the present invention.

附图7为本发明中下TC轴承的剖面结构图。7 is a cross-sectional structural view of the lower TC bearing in the present invention.

附图8为本发明中止动环与止动环套结构示意图。FIG. 8 is a schematic structural diagram of the stop ring and the stop ring sleeve in the present invention.

附图9为本发明设置在轴向冲击器的实施方式结构图。FIG. 9 is a structural diagram of an embodiment of the present invention arranged on an axial impactor.

附图10为本发明设置在井下动力钻具的实施方式结构图。FIG. 10 is a structural diagram of an embodiment of the present invention arranged in a downhole power drilling tool.

图中:1-外筒、2-外转子、3-内转子、4-止动环、5-止动环套、6-孔用卡簧、7-TC轴承外套、8-上TC轴承内套、9-下TC轴承内套、10-偏心轴承内套、11-偏心轴承外套、01-定轴旋转容积式动力工具、02-冲击总成、03-联轴器总成、04-传动轴总成、05-钻头。In the picture: 1-outer cylinder, 2-outer rotor, 3-inner rotor, 4-stop ring, 5-stopper ring sleeve, 6-circlip for hole, 7-TC bearing jacket, 8-upper TC bearing inner Sleeve, 9-lower TC bearing inner sleeve, 10-eccentric bearing inner sleeve, 11-eccentric bearing outer sleeve, 01-fixed-axis rotary positive displacement power tool, 02-impact assembly, 03-coupling assembly, 04-transmission Shaft assembly, 05-drill.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图1~10,对本发明实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的,决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to FIGS. 1 to 10 in the embodiments of the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

如附图1所示,本发明提供定轴旋转容积式动力工具,包括外筒1、内转子3、外转子2、止动环4、止动环套5、孔用卡簧6、TC轴承外套7、上TC轴承内套8、下TC轴承内套9、偏心轴承内套10、偏心轴承外套11组成;所述外筒1上端接钻柱;如附图2、3所示,所述内转子3通过螺旋齿内啮合安装在外转子2内并与外转子2形成至少有一个的共轭封闭腔,内转子3上下两端设有偏心轴承;所述偏心轴承内套10和偏心轴承外套11组成为偏心轴承,偏心轴承的偏心距等于内转子3与外转子2的中心距;所述外转子2上部和下部分别设有上TC轴承和下TC轴承;所述止动环4成对使用置于偏心轴承外侧,止动环套5卡住止动环4,卡簧安装在卡簧槽限制止动环套5移动;这样,通过内转子3上端内六角结构将内转子3拧入外转子2内,从而内转子3和外转子2重合部分的截面曲线为一对共轭曲线,满足了齿轮传动的要求,也满足了容积式马达的密封要求,内转子3和外转子2形成内啮合齿轮组,当钻井液进入工具时,内转子3在两端偏心轴承的限制下做定轴转动并传递动力给下端,同时外转子2在上TC轴承和下TC轴承的限制下做定轴转动;如附图1、8所示,偏心轴承安装在内转子3上下两端,止动环4置于偏心轴承外侧,止动环套5卡住止动环4,孔用卡簧6安装在卡簧槽限制止动环套5移动;这样,本定轴容积式动力冲击工具可以直接安装在常规钻具组合中。As shown in FIG. 1, the present invention provides a fixed-axis rotary positive displacement power tool, including an outer cylinder 1, an inner rotor 3, an outer rotor 2, a stop ring 4, a stop ring sleeve 5, a circlip 6 for holes, and a TC bearing The outer sleeve 7, the upper TC bearing inner sleeve 8, the lower TC bearing inner sleeve 9, the eccentric bearing inner sleeve 10, and the eccentric bearing outer sleeve 11 are composed; the upper end of the outer cylinder 1 is connected to the drill string; as shown in Figures 2 and 3, the The inner rotor 3 is installed in the outer rotor 2 through the internal meshing of the helical teeth and forms at least one conjugated closed cavity with the outer rotor 2. The upper and lower ends of the inner rotor 3 are provided with eccentric bearings; the eccentric bearing inner sleeve 10 and the eccentric bearing outer sleeve 11 is composed of an eccentric bearing, and the eccentric distance of the eccentric bearing is equal to the center distance between the inner rotor 3 and the outer rotor 2; the upper and lower parts of the outer rotor 2 are respectively provided with an upper TC bearing and a lower TC bearing; the snap rings 4 are paired The use is placed on the outside of the eccentric bearing, the retaining ring sleeve 5 is stuck on the retaining ring 4, and the retaining ring is installed in the retaining ring groove to limit the movement of the retaining ring sleeve 5; in this way, the inner rotor 3 is screwed into the inner hexagonal structure at the upper end of the inner rotor 3 Inside the outer rotor 2, the section curve of the overlapping part of the inner rotor 3 and the outer rotor 2 is a pair of conjugate curves, which meets the requirements of gear transmission and the sealing requirements of the positive displacement motor. The inner rotor 3 and the outer rotor 2 form a pair of conjugate curves. Internal meshing gear set, when the drilling fluid enters the tool, the inner rotor 3 rotates as a fixed shaft under the limitation of the eccentric bearings at both ends and transmits power to the lower end, while the outer rotor 2 is fixed under the limitation of the upper TC bearing and the lower TC bearing The shaft rotates; as shown in Figures 1 and 8, the eccentric bearings are installed at the upper and lower ends of the inner rotor 3, the stop ring 4 is placed on the outside of the eccentric bearing, the stop ring sleeve 5 is clamped to the stop ring 4, and the hole is with a circlip 6 Installed in the retaining ring groove to limit the movement of the stop ring sleeve 5; in this way, the fixed-axis positive displacement power impact tool can be directly installed in a conventional drilling tool assembly.

如附图4、5所示,所述偏心轴承由偏心轴承外套11和偏心轴承内套10组成,所述偏心轴承外套11一端烧结有硬质合金环,另一端设有两个等宽凹槽;所述偏心轴承外套11中部设有与外径偏心的通孔,通孔内烧结有硬质合金套;所述偏心轴承外套11烧结有硬质合金环的一端设有台阶;所述偏心轴承外套11设有若干通流孔;所述偏心轴承内套10为轴套型结构,其外部烧结有硬质合金套。这样,偏心轴承外套11一端烧结的硬质合金环与上TC轴承内套8上端部所烧结的硬质合金环相配合起到了对外转子2转动过程中轴向力的承受;偏心轴承外套11另一端两个等宽凹槽可以限制偏心轴承外套11的转动,偏心轴承外套11设置的通流孔可以导流钻井液,偏心轴承内套10与偏心轴承外套11所烧结的硬质合金套可以在恶劣的井下环境起到轴承的作用。As shown in Figures 4 and 5, the eccentric bearing consists of an eccentric bearing outer sleeve 11 and an eccentric bearing inner sleeve 10. One end of the eccentric bearing outer sleeve 11 is sintered with a cemented carbide ring, and the other end is provided with two equal-width grooves The center of the eccentric bearing shell 11 is provided with a through hole eccentric to the outer diameter, and a cemented carbide sleeve is sintered in the through hole; the end of the eccentric bearing shell 11 sintered with a cemented carbide ring is provided with a step; the eccentric bearing The outer casing 11 is provided with a number of through-flow holes; the eccentric bearing inner casing 10 is of a shaft-sleeve type structure, and a cemented carbide sleeve is sintered on the outside thereof. In this way, the cemented carbide ring sintered at one end of the eccentric bearing outer sleeve 11 cooperates with the cemented carbide ring sintered at the upper end of the upper TC bearing inner sleeve 8 to bear the axial force during the rotation of the outer rotor 2; The two equal-width grooves at one end can limit the rotation of the eccentric bearing shell 11, the through-holes provided in the eccentric bearing shell 11 can guide drilling fluid, and the sintered cemented carbide sleeves between the eccentric bearing inner shell 10 and the eccentric bearing shell 11 can be The harsh downhole environment acts as a bearing.

如附图6、7所示,所述上TC轴承内套8为轴套型结构,上部烧结有硬质合金套,中间外部设有定位台阶,下端设有外螺纹;所述上TC轴承内套8上端烧结有硬质合金环,上TC轴承内套8上部与TC轴承外套7相配合形成上TC轴承。所述下TC轴承内套9为轴套型结构,下部烧结有硬质合金套,下端内部设有螺纹;所述上TC轴承内套8下端烧结有硬质合金环,下TC轴承内套9下部与TC轴承外套7相配合形成下TC轴承。这样,上TC轴承和下TC轴承共同作用使外转子2做定轴转动并限制其轴向移动;上TC轴承内套8与TC轴承外套7之间存在的微小间隙可以流过钻井液对上TC轴承进行冷却,同时上述流经上TC轴承内套8与TC轴承外套7之间的钻井液也流经外转子2与外筒1之间的间隙对外转子2进行冷却。As shown in Figures 6 and 7, the upper TC bearing inner sleeve 8 is a shaft sleeve type structure, the upper part is sintered with a cemented carbide sleeve, a positioning step is arranged outside the middle, and an external thread is arranged at the lower end; The upper end of the sleeve 8 is sintered with a cemented carbide ring, and the upper part of the upper TC bearing inner sleeve 8 cooperates with the TC bearing outer sleeve 7 to form the upper TC bearing. The lower TC bearing inner sleeve 9 is a shaft sleeve type structure, the lower part is sintered with a cemented carbide sleeve, and the lower end is internally provided with threads; the lower end of the upper TC bearing inner sleeve 8 is sintered with a cemented carbide ring, and the lower TC bearing inner sleeve 9 The lower part cooperates with the TC bearing housing 7 to form a lower TC bearing. In this way, the upper TC bearing and the lower TC bearing work together to make the outer rotor 2 rotate on a fixed axis and limit its axial movement; the tiny gap existing between the upper TC bearing inner sleeve 8 and the TC bearing outer sleeve 7 can flow through the drilling fluid to the upper The TC bearing is cooled, and at the same time, the drilling fluid flowing between the upper TC bearing inner sleeve 8 and the TC bearing outer sleeve 7 also flows through the gap between the outer rotor 2 and the outer cylinder 1 to cool the outer rotor 2 .

本发明作为井下轴向冲击器中动力的实施方式结构图参见附图9,冲击总成02通过螺纹连接在定轴旋转容积式动力工具01中外壳的下端,在钻井作业时,内转子带动冲击总成02中动盘的定轴转动,动盘与静盘之间钻井液通流面积发生变化从而产生水击现象,进一步产生轴向冲击,提高钻头破岩效率和降低钻柱粘滑振动。Refer to Figure 9 for the structural diagram of the present invention as a power in a downhole axial impactor. The impact assembly 02 is threadedly connected to the lower end of the casing in the fixed-axis rotary positive displacement power tool 01. During drilling operations, the inner rotor drives the impact When the fixed axis of the moving plate in the assembly 02 rotates, the drilling fluid flow area between the moving plate and the static plate changes, resulting in a water hammer phenomenon, which further generates axial impact, improves the rock breaking efficiency of the drill bit and reduces the stick-slip vibration of the drill string.

本发明作为井下动力钻具中动力的实施方式结构图参见附图10,联轴器总成03装设在定轴旋转容积式动力工具01中内转子3下端,进一步依次安装传动轴总成04与钻头05;在钻井过程中,定轴旋转容积式动力工具为钻头破碎岩石提供动力,具备了常规螺杆马达低转速、大扭矩特性的同时避免了常规螺杆马达工作时径向振动带来的负面影响。Refer to Figure 10 for a structural diagram of the present invention as a power in an underground power drilling tool. The coupling assembly 03 is installed at the lower end of the inner rotor 3 in the fixed-axis rotary positive displacement power tool 01, and the transmission shaft assembly 04 is further installed in sequence. With the drill bit 05; during the drilling process, the fixed-axis rotary positive displacement power tool provides power for the drill bit to break the rock. It has the characteristics of low speed and high torque of the conventional screw motor, and avoids the negative effects caused by the radial vibration when the conventional screw motor is working. influences.

本发明定轴旋转容积式动力工具还可作为设置在其他的井下工具上起到井下动力马达的效果。The fixed-axis rotary positive displacement power tool of the present invention can also be used as a downhole power motor to be arranged on other downhole tools.

本发明中为了便于描述,各部件的相对位置关系的描述均是根据说明书附图1的布图方式来进行描述的,如:前、后、左、右、上、下、中等的位置关系是依据说明书附图1的布图方式来确定的,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of Figure 1 in the specification. For example, the positional relationship of front, rear, left, right, upper, lower and middle Determined according to the layout of FIG. 1 of the specification, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention.

在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims (5)

1.定轴旋转容积式动力工具(01),包括外筒(1)、内转子(3)、外转子(2)、止动环(4)、止动环套(5)、孔用卡簧(6)、TC轴承外套(7)、上TC轴承内套(8)、下TC轴承内套(9)、偏心轴承内套(10)、偏心轴承外套(11)组成;所述外筒(1)上端接钻柱;所述内转子(3)通过螺旋齿内啮合安装在外转子(2)内并与外转子(2)形成至少有一个的共轭封闭腔,内转子(3)上下两端设有偏心轴承;所述偏心轴承内套(10)和偏心轴承外套(11)组成为偏心轴承,偏心轴承的偏心距等于内转子(3)与外转子(2)的中心距;所述外转子(2)上部和下部分别设有上TC轴承和下TC轴承;所述止动环(4)成对使用置于偏心轴承外侧,止动环套(5)卡住止动环(4),孔用卡簧(6)安装在卡簧槽限制止动环套(5)移动。1. A fixed-axis rotary positive displacement power tool (01), including an outer cylinder (1), an inner rotor (3), an outer rotor (2), a stop ring (4), a stop ring sleeve (5), and a hole card A spring (6), a TC bearing outer sleeve (7), an upper TC bearing inner sleeve (8), a lower TC bearing inner sleeve (9), an eccentric bearing inner sleeve (10), and an eccentric bearing outer sleeve (11) are composed; the outer cylinder (1) The upper end is connected to the drill string; the inner rotor (3) is installed in the outer rotor (2) through the internal meshing of the helical teeth and forms at least one conjugated closed cavity with the outer rotor (2), and the inner rotor (3) is up and down. Eccentric bearings are provided at both ends; the eccentric bearing inner sleeve (10) and the eccentric bearing outer sleeve (11) form an eccentric bearing, and the eccentric distance of the eccentric bearing is equal to the center distance between the inner rotor (3) and the outer rotor (2); The upper and lower parts of the outer rotor (2) are respectively provided with an upper TC bearing and a lower TC bearing; the snap rings (4) are used in pairs and placed on the outside of the eccentric bearings, and the snap ring sleeve (5) is stuck to the snap ring ( 4), the circlip (6) for the hole is installed in the groove of the circlip to limit the movement of the retaining ring sleeve (5). 2.根据权利要求1所述定轴旋转容积式动力工具,其特征在于,所述外转子(2)为轴套型结构,所述外转子(2)上端内部设有定位台阶和内螺纹;所述外转子(2)下端外部设有定位台阶和外螺纹;所述外转子(2)内部通过注胶工艺成型有与内转子(3)相配合的螺杆曲面结构。2. The fixed-axis rotary positive displacement power tool according to claim 1, wherein the outer rotor (2) is a bushing type structure, and the upper end of the outer rotor (2) is provided with a positioning step and an inner thread; A positioning step and an external thread are arranged outside the lower end of the outer rotor (2); a screw surface structure matched with the inner rotor (3) is formed inside the outer rotor (2) through a glue injection process. 3.根据权利要求1所述定轴旋转容积式动力工具,其特征在于,所述偏心轴承外套(11)一端烧结有硬质合金环,另一端设有两个等宽凹槽;所述偏心轴承外套(11)中部设有与外径偏心的通孔,通孔内烧结有硬质合金套;所述偏心轴承外套(11)烧结有硬质合金环的一端设有台阶;所述偏心轴承外套(11)设有若干通流孔;所述偏心轴承内套(10)为轴套型结构,其外部烧结有硬质合金套。3. The fixed-axis rotary positive displacement power tool according to claim 1, wherein one end of the eccentric bearing shell (11) is sintered with a cemented carbide ring, and the other end is provided with two equal-width grooves; A through hole eccentric to the outer diameter is provided in the middle of the bearing outer casing (11), and a cemented carbide sleeve is sintered in the through hole; the end of the eccentric bearing outer casing (11) sintered with a cemented carbide ring is provided with a step; the eccentric bearing is provided with a step; The outer sleeve (11) is provided with a plurality of through-flow holes; the eccentric bearing inner sleeve (10) is of a shaft-sleeve type structure, and a cemented carbide sleeve is sintered on the outside thereof. 4.根据权利要求1所述定轴旋转容积式动力工具,其特征在于,所述上TC轴承内套(8)为轴套型结构,其上部烧结有硬质合金套,中间外部设有定位台阶,下端设有外螺纹;所述上TC轴承内套(8)上端烧结有硬质合金环。4. The fixed-axis rotary positive displacement power tool according to claim 1, characterized in that the upper TC bearing inner sleeve (8) is a shaft sleeve type structure, the upper part of which is sintered with a cemented carbide sleeve, and the middle and outer parts are provided with positioning The lower end is provided with an external thread; the upper end of the upper TC bearing inner sleeve (8) is sintered with a cemented carbide ring. 5.根据权利要求1所述定轴旋转容积式动力工具,其特征在于,所述下TC轴承内套(9)为轴套型结构,下部烧结有硬质合金套,下端内部设有螺纹;所述上TC轴承内套(8)下端烧结有硬质合金环。5. The fixed-axis rotary positive displacement power tool according to claim 1, wherein the lower TC bearing inner sleeve (9) is a shaft sleeve type structure, the lower part is sintered with a cemented carbide sleeve, and the lower end is internally provided with threads; A cemented carbide ring is sintered at the lower end of the upper TC bearing inner sleeve (8).
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