Screw drill transmission shaft mechanism with compound impact function

Abstract

The present invention relates to the technical field of drilling tools, and in particular to a screw drill transmission shaft mechanism with a composite impact function, comprising a water cap, an upper shaft body, an upper TC bearing movable sleeve, an upper TC bearing static sleeve, a multi-row thrust angular contact ball bearing, an upper housing, an upper spacer, an upper pressure sleeve, an upper half ring, a roller seat, a roller, a cam, a lower housing, a cam seat, a lower spacer, a lower pressure sleeve, a replaceable centralizer sleeve, an adjustment sleeve, a pressure ring, a lower TC bearing static sleeve, a lower TC bearing movable sleeve, a lower shaft body, a steel ball, an impact sleeve, a wear-resistant alloy ring, a wear-resistant alloy ring, a flow relief sleeve, a throttling nozzle, a starting hammer, an impact hammer, a diverter cover, an adjustment disk, a locking nut, an impact water nozzle, an impact disk, a transmission pin, a sealing ring, and a fastening screw. The device has a composite impact effect, can effectively solve the pressure support problem and the sticking of the drill bit during the drilling process, and save drilling cycles.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling tools, in particular to a screw drill transmission shaft mechanism with a composite impact function. Background Art

[0002] Currently, screw drill bits are used in oil and gas drilling projects primarily for oil and gas development, providing drilling power and adjusting wellbore trajectory. Following the development of oil resources, the volatile international oil prices of recent years have significantly impacted production in my country. Consequently, wells in major oil fields have been deepened and intensified, with sidetracking of older wells and the development of horizontal wells increasing. This has increased the difficulty of production. During directional drilling in short- to medium-radius wells and horizontal wells, downhole drill pipe bending and pressure, screw centralizer pressure, and bit sticking seriously impact the drilling cycle and are the most pressing issues to be addressed during production. Conventional drilling tools are no longer sufficient. To address this problem, tools such as hydraulic oscillators, rotary screws, and torsion impactors have emerged on the market. Both hydraulic oscillators and rotary screws operate axially, effectively addressing drill pipe and screw pressure. Torsion impactors operate radially, effectively addressing drill bit sticking. Simultaneously operating both tools in the same well can lead to excessive drill string pressure. Summary of the Invention

[0003] In order to effectively solve the problems in the above-mentioned background technology, the present invention proposes a screw drill transmission shaft mechanism with a composite impact function.

[0004] The specific technical solutions are as follows:

[0005] A screw drill transmission shaft mechanism with a composite impact function is characterized in that it includes: a water cap, an upper shaft body, an upper TC bearing movable sleeve, an upper TC bearing static sleeve, a multi-row thrust angular contact ball bearing, an upper shell, an upper spacer, an upper pressure sleeve, an upper half ring, a roller seat, a roller, a cam, a lower shell body, a cam seat, a lower spacer, a lower pressure sleeve, a replaceable stabilizer sleeve, an adjustment sleeve, a pressure ring, a lower TC bearing static sleeve, a lower TC bearing movable sleeve, a lower shaft body, a steel ball, an impact sleeve, a wear-resistant alloy ring, a wear-resistant alloy ring, a flow discharge sleeve, a throttling nozzle, a starting hammer, an impact hammer, a diverter cover, an adjusting disk, a locking nut, an impact water nozzle, an impact disk, a transmission pin, a sealing ring and a fastening screw. The water cap is connected to the upper shaft body by a thread, and the upper shaft body and the upper TC bearing movable sleeve are connected by a thread. The upper TC shaft The clearance between the moving sleeve and the upper TC bearing static sleeve is matched, the multi-row thrust angular contact ball bearing is installed on the upper shaft body, the roller seat is fixed in the lower shell body by screws, the four rollers are fixed on the roller seat, the cam is fixed to the cam seat by screws, the cam seat is connected to the upper shaft body by a transmission pin, and is connected to the lower shaft body by a threaded connection, an impact mechanism is installed inside the big head of the lower shaft body, the lower shaft body and the impact sleeve are matched with splines, and are locked by steel balls, the wear-resistant alloy ring and the wear-resistant alloy ring are hot-mounted on the impact sleeve and the impact hammer respectively, the impact hammer sits in the impact sleeve, the starting hammer is matched with the impact hammer by splines, the discharge sleeve is set in the starting hammer, the throttling nozzle is hot-mounted in the discharge sleeve, the diverter cover and the discharge sleeve are connected by splines, the impact water nozzle is connected to the upper shaft body by threads, and matched with the lower shaft body.

[0006] Preferably, a sealing ring is placed between the cam and the cam seat.

[0007] Compared with the prior art, the beneficial effects of the present invention are: the device has a composite impact effect, can effectively solve the support pressure problem and the sticking of the drill bit during the drilling process, and save drilling cycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a cross-sectional view of the present invention;

[0009] In the figure: 1-water cap 2-upper shaft body 3-upper TC bearing movable sleeve 4-upper TC bearing static sleeve 5-multi-row thrust angular contact ball bearing 6-upper housing 7-upper spacer 8-upper pressure sleeve 9-upper half ring 10-roller seat 11-roller 12-cam 13-lower housing 14-cam seat 15-lower spacer 16-lower pressure sleeve 17-replaceable centralizer sleeve 18-adjusting sleeve 19-pressure ring 20-lower TC bearing static sleeve 21-lower TC bearing movable sleeve 22-lower shaft body 23-steel ball 24-impact sleeve 25-wear-resistant alloy ring 26-wear-resistant alloy ring 27-drain sleeve 28-throttling nozzle 29-starting hammer 30-impact hammer 31-diverter cover 32-adjusting disk 33-locking nut 34-impact water nozzle 35-impact disk 36-drive pin 37-sealing ring 38-fastening screw DETAILED DESCRIPTION

[0010] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0011] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments. Figure 1As shown, a screw drill transmission shaft mechanism with a composite impact function includes: a water cap 1, an upper shaft body 2, an upper TC bearing movable sleeve 3, an upper TC bearing static sleeve 4, a multi-row thrust angular contact ball bearing 5, an upper housing 6, an upper spacer sleeve 7, an upper pressure sleeve 8, an upper half ring 9, a roller seat 10, a roller 11, a cam 12, a lower housing 13, a cam seat 14, a lower spacer sleeve 15, a lower pressure sleeve 16, a replaceable centralizer sleeve 17, an adjustment sleeve 18, a pressure ring 19, a lower TC bearing static sleeve 20, a lower TC bearing movable sleeve 21, a lower shaft body 22, a steel ball 23, an impact sleeve 24, a wear-resistant alloy ring 25, a wear-resistant alloy ring 26, a flow discharge sleeve 27, a throttling nozzle 28, a starting hammer 29, an impact hammer 30, a diverter cover 31, an adjusting disk 32, a locking nut 33, an impact water nozzle 34, an impact disk 35, a drive pin 36, a sealing ring 37, and a fastening screw 38. The water cap 1 is connected to the upper shaft body 2 by threads, and the upper shaft body 2 is connected to the upper TC bearing movable sleeve 3 by threads. The upper TC bearing movable sleeve 3 and the upper TC bearing static sleeve 4 are matched with each other in a clearance, which is mainly used for straightening. The multi-row thrust angular contact ball bearing 5 is installed on the upper shaft body 2, which mainly bears the drilling pressure. The upper spacer 7, the upper pressure sleeve 8, and the upper half ring 9 are mainly used for limiting and transmitting the drilling pressure. The roller seat 10 is fixed to the lower shell 13 by screws. The four rollers 11 are fixed on the roller seat 10. The cam 12 is fixed to the cam seat 14 by screws. The cam seat 14 is connected to the upper shaft body 2 by a transmission pin 36 and is connected to the lower shaft body 22 by threads. A sealing ring 37 is placed between the cam 12 and the cam seat 14. The lower spacer 15, the lower pressure sleeve 16, the replaceable centralizer sleeve 17, and the adjustment sleeve 18 are mainly used for limiting and transmitting the drilling pressure. The pressure ring 19 and the lower TC bearing static sleeve 2 0 is the lower TC bearing, which is mainly used to prevent the lateral force of the drill bit from damaging the transmission shaft. An impact mechanism is installed inside the big head of the lower shaft body 22. The lower shaft body 22 and the impact sleeve 24 are splined and locked by the steel ball 23. The wear-resistant alloy ring 25 and the wear-resistant alloy ring 26 are respectively hot-fitted on the impact sleeve 24 and the impact hammer 30, mainly for the axial wear resistance of the impact hammer 30 during operation. The impact hammer 30 sits in the impact sleeve 24, and the starting hammer 29 is splined with the impact hammer 30. The discharge sleeve 27 is installed in the starting hammer 29, and the throttling nozzle 28 is hot-fitted in the discharge sleeve 27 for adjusting the pressure. The diverter cover 31 is connected to the discharge sleeve 27 by a spline. The diverter cover 31 is mainly for diversion. The locking nut 33 is threaded to fix the other parts together. The impact water nozzle 34 is threadedly connected to the upper shaft body 2 and cooperates with the lower shaft body 22. The impact water nozzle 34 is mainly used for anti-impact.The structural principle and advantages of this invention are as follows: mud passes through the upper motor, driving the motor to produce planetary motion. This planetary motion is converted into fixed-axis motion through the screw universal joint and transmitted to the upper shaft. The upper shaft drives the cam mechanism to move, and under the action of the bit pressure, an axial impact motion is generated. The mud continues to pass through the lower shaft and enters the hydraulic mechanism. Inside the lower hydraulic mechanism, the mud converts high and low pressures, driving the impact hammer to produce radial reciprocating motion. This creates a compound impact effect, effectively solving the pressure support problem and drill bit sticking during the drilling process, saving drilling time.

[0012] The above is only a preferred embodiment of the present invention. 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. 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 mechanism with a composite impact function, characterized in that: Including water cap, upper shaft, upper TC bearing movable sleeve, upper TC bearing static sleeve, multi-row thrust angular contact ball bearing, upper shell, upper spacer, upper pressure sleeve, upper half ring, roller seat, roller, cam, lower shell, cam seat, lower spacer, lower pressure sleeve, replaceable stabilizer sleeve, adjustment sleeve, pressure ring, lower TC bearing static sleeve, lower TC bearing movable sleeve, lower shaft, steel ball, impact sleeve, first wear-resistant alloy ring, second wear-resistant alloy ring, discharge sleeve, throttling nozzle, starting hammer, impact hammer, diverter cover, adjusting plate, locking nut, impact water nozzle, impact plate, transmission pin, sealing ring and fastening screw. The water cap is connected to the upper shaft by thread, the upper shaft and the upper TC bearing movable sleeve are connected by thread, the clearance between the upper TC bearing movable sleeve and the upper TC bearing static sleeve is matched, and the multi-row thrust angular contact ball bearing is connected by thread. The angular contact ball bearing is installed on the upper shaft body, the roller seat is fixed in the lower shell body by screws, the four rollers are fixed on the roller seat, the cam is fixed to the cam seat by screws, the cam seat is connected to the upper shaft body by a transmission pin, and is connected to the lower shaft body by a threaded connection. An impact mechanism is installed inside the big head of the lower shaft body, the lower shaft body and the impact sleeve are matched with a spline and locked by a steel ball. The first wear-resistant alloy ring and the second wear-resistant alloy ring are hot-mounted on the impact sleeve and the impact hammer respectively. The impact hammer sits in the impact sleeve, and the starting hammer is matched with the impact hammer through a spline. The discharge sleeve is set in the starting hammer, the throttling nozzle is hot-mounted in the discharge sleeve, the diverter cover and the discharge sleeve are connected by a spline, the impact water nozzle is connected to the upper shaft body by a thread and matched with the lower shaft body; a sealing ring is placed between the cam and the cam seat.

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