Anti-falling mechanism for transmission shaft shell of screw drill
By designing a screw drill tool drive shaft housing anti-fall mechanism, using threaded connection and annular shoulder fit, the problem of failure and fall of the transmission shaft during downhole work is solved, and underground safety is achieved.
Patent Information
- Application Number
- CN202411882160.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-02-25
AI Technical Summary
The existing screw drilling tool transmission shaft is prone to failure during long-term downhole work, resulting in the bottom of the transmission shaft falling from the well without any anti-fall, causing safety hazards.
A screw drill tool drive shaft housing anti-fall mechanism is designed. The drive shaft housing prevention mechanism is achieved by combining the drive shaft upper housing and the drive shaft lower housing anti-fall prevention shell, and the drive shaft shaft head and the inner and outer annular shoulders of the lower housing to prevent the fall of the drive shaft housing.
In the absence of additional components, the failure of the transmission shaft is effectively prevented and the safety of underground drilling operations is ensured.
Smart Images
Figure CN119508334A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of petroleum drilling equipment, and in particular relates to a screw drilling tool transmission shaft housing anti-drop mechanism. Background Art
[0002] In oil and gas drilling, screw drill tools are mainly used to drill special process wells, and can also be used to drill vertical wells. With the development of oil and gas exploration and development, drilling technology is constantly developing, which has promoted the continuous progress and improvement of screw drill tools. Looking at its development process and development trend, its direction can be basically summarized as: long life, high torque, high speed, and multi-function. At present, the purpose of the screw drill tools used in oil and gas drilling projects is to transmit the power of the motor to the drill bit, and the life of the drive shaft assembly determines the life of the whole screw drill tool. The motor transmits power to the drive shaft through the universal shaft. The drive shaft assembly not only bears the drilling pressure during drilling, but also transmits torque and speed. The drive shaft assembly has many parts. After working underground for a long time, the drive shaft assembly will fail, causing underground accidents. Among them, because the drive shaft breaks from the lower bearing, it often falls into the well due to the lack of anti-fall at the bottom. Summary of the invention
[0003] The purpose of the present invention is to provide a screw drill transmission shaft housing anti-drop mechanism to solve the problems existing in the prior art.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screw drill transmission shaft housing anti-drop mechanism, comprising a transmission shaft, a lower TC bearing movable sleeve, a lower TC bearing static sleeve, a thrust bearing group, a transmission shaft upper housing, a transmission shaft lower anti-drop housing, an upper TC bearing static sleeve, and an upper TC bearing movable sleeve; the transmission shaft upper housing and the transmission shaft lower anti-drop housing are connected together, the lower TC bearing movable sleeve and the transmission shaft are connected together by threads, the transmission shaft housing and the lower TC bearing static sleeve are connected by threads, the thrust bearing group is installed between the transmission shaft upper housing and the transmission shaft, the upper TC bearing static sleeve is installed between the transmission shaft housing and the thrust bearing group, and the upper TC bearing movable sleeve is threadedly connected to the transmission shaft.
[0005] Preferably, there is an annular shoulder on the upper part of the shaft head end of the transmission shaft, and the lower anti-drop shell of the transmission shaft is connected to the upper shell of the transmission shaft through the shaft head end of the transmission shaft shaft body, and the inner annular shoulder at the lower part of the lower anti-drop shell of the transmission shaft cooperates with the outer annular shoulder of the shaft head of the transmission shaft.
[0006] The beneficial effect of the present invention is that the upper shell of the transmission shaft and the lower anti-drop shell of the transmission shaft in the device are connected, and then cooperate with the shaft head of the transmission shaft. Without additional components, the failed part is prevented from falling, thereby ensuring underground safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a front view of the present invention;
[0008] Figure 2 This is a cross-sectional view of the anti-drop housing under the transmission shaft in the present invention;
[0009] Figure 3 is a sectional view of the transmission shaft in the present invention;
[0010] In the figure: 1. transmission shaft, 2. lower TC bearing moving sleeve, 3. lower TC bearing static sleeve, 4. transmission shaft lower anti-drop housing, 5. transmission shaft upper housing, 6 half ring, 7. pressure sleeve, 8. spacer sleeve, 9. thrust bearing group, 10. upper TC bearing static sleeve, 11. upper TC bearing moving sleeve. DETAILED DESCRIPTION
[0011] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.
[0012] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0013] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fixed connection" and "fixed connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.
[0014] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.
[0015] like Figure 1 As shown, a screw drill transmission shaft housing anti-drop mechanism includes a transmission shaft 1, a lower TC bearing movable sleeve 2, a lower TC bearing static sleeve 3, a transmission shaft lower anti-drop housing 4, a transmission shaft upper housing 5, a half ring 6, a pressure sleeve 7, a spacer sleeve 8, a thrust bearing group 9, an upper TC bearing static sleeve 10 and an upper TC bearing movable sleeve 11; the transmission shaft upper housing 5 and the transmission shaft lower anti-drop housing 4 are connected together, and the two are connected together by threads, so as to prevent the transmission shaft housing from falling.
[0016] The transmission shaft 1 cooperates with the transmission shaft lower anti-drop housing 4. Specifically, the transmission shaft lower anti-drop housing 4 is provided with an inner annular shoulder 12 inwardly. Figure 2 and the shaft head of the transmission shaft is provided with an outer annular shoulder 13 circumferentially outwardly, as Figure 3 As shown, the two cooperate with each other, so that the anti-drop housing 4 under the transmission shaft cannot fall off the transmission shaft.
[0017] The lower TC bearing moving sleeve and the transmission shaft are connected together by threads, the transmission shaft housing and the lower TC bearing static sleeve are connected by threads, the thrust bearing group is installed between the transmission shaft upper housing and the transmission shaft, the upper TC bearing static sleeve is installed between the transmission shaft housing and the thrust bearing group, and the upper TC bearing moving sleeve is threadedly connected to the transmission shaft.
[0018] The transmission shaft head and the transmission shaft lower anti-drop housing are both shoulder-type. The transmission shaft head end has an annular shoulder on the upper part, the transmission shaft lower anti-drop housing is connected to the transmission shaft upper housing by the shaft head end of the transmission shaft body, and the inner annular shoulder at the lower part of the transmission shaft lower anti-drop housing cooperates with the outer annular shoulder of the transmission shaft head.
[0019] In the device, the upper housing of the transmission shaft and the lower anti-drop housing of the transmission shaft are connected, and then cooperate with the shaft head of the transmission shaft. Without additional components, the failed part is prevented from falling, thereby ensuring underground safety.
[0020] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A screw drill transmission shaft housing anti-drop mechanism, characterized in that: It includes a transmission shaft, a lower TC bearing moving sleeve, a lower TC bearing static sleeve, a thrust bearing group, a transmission shaft upper housing, a transmission shaft lower anti-drop housing, an upper TC bearing static sleeve, and an upper TC bearing moving sleeve; the transmission shaft upper housing and the transmission shaft lower anti-drop housing are connected together, the lower TC bearing moving sleeve and the transmission shaft are connected together by threads, the transmission shaft housing and the lower TC bearing static sleeve are connected by threads, the thrust bearing group is installed between the transmission shaft upper housing and the transmission shaft, the upper TC bearing static sleeve is installed between the transmission shaft housing and the thrust bearing group, and the upper TC bearing moving sleeve is threadedly connected to the transmission shaft.
2. The screw drill transmission shaft housing anti-drop mechanism according to claim 1, characterized in that: There is an annular shoulder on the upper part of the shaft head end of the transmission shaft, and the lower anti-drop housing of the transmission shaft is connected to the upper housing of the transmission shaft through the shaft head end of the transmission shaft shaft body, and the inner annular shoulder at the lower part of the lower anti-drop housing of the transmission shaft cooperates with the outer annular shoulder of the shaft head of the transmission shaft.