Shock absorber for petroleum drilling

Abstract

The shock absorber for petroleum drilling is connected between a drill collar and a drill bit and comprises a conversion connector with one end connected to the drill collar, the other end of the conversion connector is connected to one end of a fixing base, and the other end of the fixing base is connected to one end of a shock absorber sleeve. The other end of the shock absorber sleeve is connected to the outer portion of a spline outer cylinder, a spline mandrel is slidably installed in the spline outer cylinder in the axial direction, the bottom end of the spline mandrel is connected to the drill bit, a positioning sleeve is connected to the interior of the adapter substitute, the interior of the positioning sleeve is connected to one end of a spring lining bar, and the other end of the spring lining bar is connected to the other end of the shock absorber sleeve. The spring cushion rod is arranged in the fixing base in an attached mode, the other end of the spring cushion rod abuts against one end of the compression spring, the compression spring is arranged on and abuts against the spring sleeve in a sleeved mode, and the spring sleeve is located in the shock absorber sleeve and abuts against the end, away from the drill bit, of the spline mandrel. Vibration generated when the drill bit works can be absorbed.

Description

Technical Field

[0001] The present application relates to the field of oil drilling, and in particular to a shock absorber for oil drilling. Background Art

[0002] When drilling for oil, the drill bit is prone to vibration due to contact with hard objects such as rocks. Vibration can cause transmission failure and affect production efficiency. Summary of the invention

[0003] The object of the present invention is to provide a shock absorber for oil drilling, which can absorb the vibration of the drill bit when it is working.

[0004] To achieve the above object, the present invention provides the following technical solutions.

[0005] The embodiment of the present application discloses a shock absorber for oil drilling, which is connected between a drill collar and a drill bit, and includes a conversion joint with one end connected to the drill collar, the other end of the conversion joint is connected to one end of a fixed seat, the other end of the fixed seat is connected to one end of a shock absorber sleeve, the other end of the shock absorber sleeve is connected to the outside of a spline outer cylinder, a spline core shaft is axially slidably installed inside the spline outer cylinder, the bottom end of the spline core shaft is connected to the drill bit, a positioning sleeve is connected to the inside of the conversion joint, the inside of the positioning sleeve is connected to one end of a spring pad rod, the spring pad rod is fitly arranged inside the fixed seat, the other end of the spring pad rod abuts against one end of a compression spring, the compression spring sleeve is arranged on and abuts against the spring sleeve, the spring sleeve is located inside the shock absorber sleeve, and the spring sleeve abuts against one end of the spline core shaft away from the drill bit.

[0006] Preferably, in the above-mentioned shock absorber for oil drilling, the outside and the inside of the positioning sleeve are respectively connected to the conversion joint and the spring pad rod through threads.

[0007] Preferably, in the above-mentioned shock absorber for oil drilling, the conversion joint and the fixing seat are connected by threads.

[0008] Preferably, in the above-mentioned shock absorber for oil drilling, an elastic space is formed between the spring sleeve and the spring pad rod.

[0009] Preferably, in the above-mentioned shock absorber for oil drilling, the fixing seat and the shock absorber sleeve are connected by threads.

[0010] Preferably, in the above-mentioned shock absorber for oil drilling, the outer side of the spline core shaft is evenly distributed along the circumferential direction with a plurality of slide grooves extending along the axial direction, and the inner wall of the spline outer cylinder is correspondingly arranged along the circumferential direction to form a plurality of sliders extending along the axial direction, and the sliders slide in the slide grooves.

[0011] Compared with the prior art, the advantage of this technical solution is that the vibration generated by the drill bit is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 Shown is a schematic diagram of a shock absorber for oil drilling in an embodiment of the present invention. DETAILED DESCRIPTION

[0014] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Combination Figure 1As shown, a shock absorber 100 for oil drilling is connected between a drill collar (not shown) and a drill bit (not shown), and includes a conversion joint 101 connected to the drill collar at one end, the other end of the conversion joint 101 is connected to one end of a fixing seat 102, the other end of the fixing seat 102 is connected to one end of a shock absorber sleeve 103, the other end of the shock absorber sleeve 103 is connected to the outside of a spline outer cylinder 104, and a spline core shaft 105 is axially slidably installed inside the spline outer cylinder 104, and the bottom of the spline core shaft 105 is connected to the outer end of the spline outer cylinder 104. The end is connected to the drill bit, and the interior of the conversion joint 101 is connected with a positioning sleeve 106, and the interior of the positioning sleeve 106 is connected to one end of a spring pad rod 107, and the spring pad rod 107 is arranged in a close relationship with the interior of the fixed seat 102, and the other end of the spring pad rod 107 abuts against one end of a compression spring 108, and the compression spring 108 is sleeved and abuts against a spring sleeve 109, and the spring sleeve 109 is located inside the shock absorber sleeve 103, and the spring sleeve 109 abuts against one end of the spline mandrel 105 away from the drill bit. The exterior and interior of the positioning sleeve 106 are respectively connected to the conversion joint 101 and the spring pad rod 107 by threads. The conversion joint 101 is connected to the fixed seat 102 by threads. An elastic space 110 is formed between the spring sleeve 109 and the spring pad rod 107. The fixed seat 102 and the shock absorber sleeve 103 are connected by threads. The outer side of the spline core shaft 105 is evenly arranged along the circumferential direction with a plurality of axially extending slide grooves 111 , and the inner wall of the spline outer cylinder 104 is correspondingly arranged along the circumferential direction to form a plurality of axially extending sliders 112 , which slide in the slide grooves 111 .

[0016] In this embodiment, the spline core shaft is connected to the drill bit, and the drill bit vibrates, causing the spline core shaft to also vibrate (mainly used to absorb vibrations in the vertical direction), and the spline core shaft is vertically slidably installed on the content of the spline outer cylinder, because the outer wall of the spline core shaft is arranged in an annular direction to form a plurality of axially extending sliding grooves, and the interior of the spline outer cylinder is formed with a corresponding sliding block, through the sliding setting, the vibration of the spline core shaft will not be brought to the spline outer cylinder, that is, the spline outer cylinder does not vibrate vertically, that is, after a series of connections, other components do not vibrate, and the vibrating spline core shaft will be transmitted to the spring sleeve due to the support by the spring sleeve, and a compression spring is provided on the spring sleeve, which will absorb the corresponding vibration, and the vertical vibration has a small amplitude and a large elastic force of the spring, so it is only necessary to maintain a certain elastic space between the spring sleeve and the spring pad rod, although the spring pad rod is connected to the inside of the fixed seat and connected to the conversion joint through the positioning sleeve, but the vibration has been absorbed by the compression spring.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0018] The above is only a specific implementation of the present application. 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 application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A shock absorber for oil drilling, characterized in that: It is connected between the drill collar and the drill bit, and includes a conversion joint with one end connected to the drill collar, the other end of the conversion joint is connected to one end of the fixed seat, the other end of the fixed seat is connected to one end of the shock absorber sleeve, the other end of the shock absorber sleeve is connected to the outside of the spline outer cylinder, the interior of the spline outer cylinder is axially slidably mounted with a spline core shaft, the bottom end of the spline core shaft is connected to the drill bit, the interior of the conversion joint is connected with a positioning sleeve, the interior of the positioning sleeve is connected to one end of a spring pad rod, the spring pad rod is fitly arranged in the interior of the fixed seat, the other end of the spring pad rod abuts against one end of a compression spring, the compression spring sleeve is arranged in and abuts against the spring sleeve, the spring sleeve is located in the shock absorber sleeve, and the spring sleeve abuts against one end of the spline core shaft away from the drill bit.

2. The shock absorber for oil drilling according to claim 1, characterized in that: The outside and the inside of the positioning sleeve are respectively connected to the conversion joint and the spring pad rod through threads.

3. The shock absorber for oil drilling according to claim 1, characterized in that: The conversion joint is connected to the fixing seat via threads.

4. The shock absorber for oil drilling according to claim 1, characterized in that: An elastic space is formed between the spring sleeve and the spring pad rod.

5. The shock absorber for oil drilling according to claim 1, characterized in that: The fixing seat and the shock absorber sleeve are connected via threads.

6. The shock absorber for oil drilling according to claim 1, characterized in that: The outer side of the spline core shaft is evenly arranged along the circumferential direction with a plurality of axially extending slide grooves, and the inner wall of the spline outer cylinder is correspondingly arranged along the circumferential direction to form a plurality of axially extending sliders, and the sliders slide in the slide grooves.

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