A bit weak point anti-disconnection protection device

Abstract

The application discloses a bit weakness anti-disconnection protection device, which comprises a protective sleeve, an inner cavity is formed in the protective sleeve by hollowing, the shape of the inner cavity of the protective sleeve is the same as the shape of the outside of a bit, and the protective sleeve is nested on the outside of the bit. The front end of the protective sleeve is nested in the torpedo part of the top of the bit, the inner diameter of the front end of the inner cavity of the protective sleeve is smaller than the outer diameter of the top of the torpedo, and the rear end of the protective sleeve is connected with the bit by using a limiting screw. When the bit is instantaneously disconnected due to weakness when being connected with instruments at a well mouth, the bit can avoid falling into a well or falling from a drilling platform, and an unsafe accident of the instruments or people can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of petroleum exploration well detection and relates to a protection device for preventing disconnection of a horse bridle. Background Technology

[0002] The bridle is an essential piece of logging equipment for wireline logging. Throughout the logging operation, the bridle effectively connects the logging cable and logging instruments to complete the logging work. The bridle also plays a crucial role in hoisting logging instruments onto the drilling platform and connecting them one by one. Before logging, the logging instruments are hoisted one by one from the anchor road on the drilling platform using a winch cable via the bridle to the wellhead. Then, logging professionals connect the instruments one by one. During this process, the cable, bridle, and instruments encounter many steps and sharp edges on the anchor road, which often cause the bridle to get caught or jammed. This can result in excessive upward tension exceeding the breaking force of the bridle's tension rod. If the winch operator fails to detect the instantaneous change in lifting tension at this time, the tension bar will break instantly. The cable and torpedo, carrying the broken tension bar, will detach from the bridle shell and the logging instruments connected below, causing the logging instruments to fall into the well or roll off the drilling platform. This process can also easily cause personal injury and complicate subsequent construction. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bridle weakness prevention and disconnection protection device. When the bridle breaks instantly at the wellhead when it is connected to the instrument, it can prevent the instrument from falling into the well or falling off the drilling platform, thus avoiding unsafe accidents involving the instrument or people.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A bridle weakness prevention and disconnection protection device, including a protective sleeve;

[0006] The protective sleeve is hollow inside to form an inner cavity. The shape of the inner cavity of the protective sleeve is the same as the shape of the outer part of the bridle. The protective sleeve is nested on the outside of the bridle. The front end of the protective sleeve is nested on the torpedo part at the top of the bridle. The inner diameter of the front end of the protective sleeve is smaller than the outer diameter of the top of the torpedo. The rear end of the protective sleeve is connected to the bridle by a limit screw.

[0007] Preferably, the protective sleeve is provided with an axial first through groove, the width of which is greater than the cable diameter.

[0008] Furthermore, a locking nut is nested on the front circumferential surface of the protective sleeve, and the front circumferential surface of the protective sleeve is threadedly connected to the locking nut. The locking nut is provided with a second through groove with the same width as the through groove in the axial direction.

[0009] Preferably, the rear end of the protective sleeve is radially connected to the bridle using a limiting screw.

[0010] Furthermore, the total shear force after the radial connection of the limit screws is greater than 30% of the shear force of the tension bar.

[0011] Preferably, the rear end of the protective sleeve is provided with a limit screw hole, the position of which corresponds to the position of the oil spring observation hole of the bridle, and the limit screw hole and the oil spring observation hole are radially connected by a limit screw.

[0012] Furthermore, there are multiple limit screw holes, evenly distributed on the circumference of the protective sleeve.

[0013] Furthermore, the number of limit screw holes is two or four.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When using a bridle to hoist instruments, if the bridle gets stuck in the derrick anchorage or elsewhere, causing the bridle's tension rod to break instantly, the bridle's protective sleeve, through the combined action of its top diameter limit and bottom limiting function, instantly protects the logging instrument from falling. This prevents the cable, carrying the torpedo, from detaching from the instrument below the bridle, thus preventing accidents such as the logging instrument falling into the well, falling off the drilling rig, or injuring personnel. When the entire protective sleeve is in operation, the limiting screw at the bottom of the sleeve firmly locks the bridle's tension rod inside. Since the top diameter of the protective sleeve is smaller than the diameter of the torpedo, the tension rod is connected to the torpedo as a single unit, preventing the broken tension rod and torpedo from detaching from the bridle's outer shell. With this protective device installed, the hoisting and connection of logging instruments using the bridle can be carried out safely and systematically, eliminating major potential hazards.

[0016] Furthermore, the first through groove in the axial direction of the protective sleeve can be used to slide the protective sleeve onto the cable from the upper end of the torpedo along the first through groove of the protective sleeve, and then push it down along the cable and torpedo onto the bridle body, which is convenient for installation and does not require pre-installation on the bridle.

[0017] Furthermore, the locking nut can be tightened half a turn to seal the first through slot, the purpose of which is to lock the cable and torpedo inside the protective sleeve, preventing the protective sleeve slot from cutting the cable during instrument hoisting. Another function of the locking nut is that if the tension rod breaks, the impact force of the instrument falling instantly could very likely push open the top of the protective sleeve, and this locking nut can prevent it from doing so. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the horse bridle weak point anti-disconnection protection device of the present invention;

[0019] Figure 2 This is a cross-sectional view of the horse bridle weak point anti-breakage protection device of the present invention.

[0020] Wherein: 1-protective sleeve; 2-locking nut; 3-limiting screw hole; 4-first through groove. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figure 1 and 2 As shown, the bridle weakness anti-breakage protection device of the present invention includes a protective sleeve 1 and a locking nut 2.

[0025] The protective sleeve 1 is hollow inside to form an inner cavity. The shape of the inner cavity of the protective sleeve 1 is the same as the shape of the outer part of the bridle. The protective sleeve 1 is nested on the outside of the bridle. The front end of the protective sleeve 1 is nested on the torpedo part at the top of the bridle. The inner diameter of the front end of the protective sleeve 1 is smaller than the outer diameter of the top of the torpedo. The rear end of the protective sleeve 1 is radially connected to the bridle by a limit screw.

[0026] The protective sleeve 1 is provided with an axial first through groove 4, the width of which is greater than the diameter of the cable, for fitting onto the bridle from the cable.

[0027] A locking nut 2 is nested on the front circumferential surface of the protective sleeve 1. The front circumferential surface of the protective sleeve 1 is threadedly connected to the locking nut 2. The locking nut 2 is provided with a second through groove with the same width as the through groove 4 in the axial direction.

[0028] The protective sleeve 1 has a limit screw hole 3 at the rear end. The position of the limit screw hole 3 corresponds to the position of the oil spring observation hole of the bridle. The limit screw hole 3 and the oil spring observation hole are radially connected by a limit screw.

[0029] There are multiple limiting screw holes 3, evenly distributed on the circumference of the protective sleeve 1. The number of limiting screw holes 3 can be two or four; in this embodiment, there are four limiting screw holes 3.

[0030] Before connecting the instruments at the wellhead, first slip the protective sleeve 1 onto the cable at the top of the torpedo along the first through groove 4 of the protective sleeve, and then push it down onto the bridle body along the cable and torpedo. Align the four limit screw holes at the rear end of the protective sleeve 1 with the four oil injection spring observation holes of the bridle body, and install two or four limit screws. During installation, at least two screws with a relative position of 180° must be installed, and the total shear force of the installed limit screws must be greater than 30% of the shear force of the tension bar. At this point, the top of the protective sleeve 1 of the bridle is flush with the top spring of the bridle torpedo. Its internal shape is consistent with the shape of the top spring of the bridle torpedo. Its diameter is smaller than the top diameter of the bridle torpedo, and the limiting diameter can be used to achieve the purpose of limiting. A top locking nut 2 is also provided at the upper end of the bridle protective sleeve, and the locking nut 2 has a second through groove with the same width as the through groove 4 in the axial direction. After the protective sleeve 1 is installed, gently tighten the top locking nut 2 half a turn to seal the first through slot 4. This is to lock the cable and torpedo inside the protective sleeve and prevent the first through slot 4 of the protective sleeve 1 from cutting the cable during instrument hoisting. Another function of the locking nut is that if the tension rod breaks, the impact force of the instrument falling instantly could very likely pry open the top of the protective sleeve 1, and this locking nut 2 can prevent it from prying open.

[0031] The protective sleeve 1 works as follows: When using a bridle to hoist instruments, if the bridle gets stuck in the derrick anchorage or elsewhere, causing the bridle's tension rod to break instantly, the protective sleeve 1, through the combined action of its top diameter limit and bottom limiting function, instantly protects the logging instrument from falling. This prevents the cable, carrying the torpedo, from detaching from the instrument below the bridle, thus avoiding accidents such as the logging instrument falling into the well, falling off the drilling rig, or injuring personnel. When the protective sleeve 1 is in operation, the limiting screw at the bottom of the sleeve firmly locks the tension rod inside the bridle. Since the top diameter of the protective sleeve 1 is smaller than the diameter of the torpedo, the tension rod is connected to the torpedo as a single unit, preventing the broken tension rod and torpedo from detaching from the bridle casing. With this protective device installed, the hoisting and connection of logging instruments using the bridle ensures safe hoisting, orderly construction, and eliminates major potential hazards.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A bit weakening anti-disconnection protection device, characterized in that, Including protective case (1); The protective sleeve (1) is hollow inside to form an inner cavity. The shape of the inner cavity of the protective sleeve (1) is the same as the shape of the outer part of the bridle. The protective sleeve (1) is nested outside the bridle. The front end of the protective sleeve (1) is nested in the torpedo part at the top of the bridle. The inner diameter of the front end of the protective sleeve (1) is smaller than the outer diameter of the top of the torpedo. The rear end of the protective sleeve (1) is connected to the bridle by a limiting screw. The protective sleeve (1) is provided with an axial first through groove (4), the width of which is greater than the diameter of the cable; The protective sleeve (1) has a locking nut (2) nested on its front end circumferential surface. The front end circumferential surface of the protective sleeve (1) is threadedly connected to the locking nut (2). The locking nut (2) has a second through groove with the same width as the through groove (4) in the axial direction. The protective sleeve (1) is radially connected to the horse bridle by a limit screw at the rear end; The total shear force after the limit screw is radially connected is greater than 30% of the shear force of the tension bar.

2. The bit weakening anti-disconnection protection device of claim 1, wherein, The protective sleeve (1) has a limit screw hole (3) at the rear end. The position of the limit screw hole (3) corresponds to the position of the oil spring observation hole of the bridle. The limit screw hole (3) and the oil spring observation hole are connected radially by a limit screw.

3. The bit weakening anti-disconnection protection device of claim 2, wherein, There are multiple limit screw holes (3), which are evenly distributed on the circumference of the protective sleeve (1).

4. The bit weakening anti-disconnection protection device of claim 2, wherein, The number of limit screw holes (3) is two or four.

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