CN117345129A - Broken protection device is prevented to headstall weakness - Google Patents

Abstract

The invention discloses a device for protecting a headstall from being broken due to weak points, which comprises a protective sleeve; the inner part of the protective sleeve is hollow to form an inner cavity, the shape of the inner cavity of the protective sleeve is the same as the outer shape of the headstall, and the protective sleeve is nested outside the headstall; the front end of the protective sleeve is nested at the torpedo part at the top of the headstall, 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 headstall by a limit screw. When the headstock is broken in the moment of the weak point when the well head is connected with the instrument, the instrument is prevented from falling down or falling down from the drill floor, and unsafe accidents of the instrument or people occur.

Description

Broken protection device is prevented to headstall weakness

Technical Field

The invention belongs to the field of petroleum exploration logging, and relates to a device for protecting a headstall from being broken due to weak points.

Background

The headstall is one of the logging equipment necessary for cable logging. And effectively connecting the logging cable with the logging instrument through the joint action of the headstock in the whole logging operation process, so as to complete logging operation. The headstall also carries the main task of lifting the logging instrument at the drill floor and connecting the instruments together one after the other. Before logging, the logging instruments are hung to the well head of the drill floor by the winch cable from the anchor path of the drill floor through the headstock, and then connected one by logging professionals. In the running process of the cable, the headstall and the instrument, a plurality of steps and edge angles on an anchor can be encountered, the headstall can be frequently hung or clamped, the lifting tension can be too large in the moment, and the lifting tension exceeds the breaking force of a headstall tension rod. At this time, if the winch operator cannot find the instant change of the lifting tension in time, the instant tension rod is broken, the cable and the torpedo carry the broken tension rod to be separated from the headstall shell and the logging instrument connected below, so that the logging instrument falls into the well or rolls off from the drill floor, and the process is extremely easy to cause personal injury and the later construction is complicated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a device for preventing the broken of the weak point of a headstock, which can prevent the tool from falling down or falling down from a drill floor and avoid unsafe accidents of the tool or people when the headstock is broken instantly at the weak point generated when the headstock is connected with the tool at the wellhead.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a broken protection device for the weak point of a headstall comprises a protection sleeve;

the inner part of the protective sleeve is hollow to form an inner cavity, the shape of the inner cavity of the protective sleeve is the same as the outer shape of the headstall, and the protective sleeve is nested outside the headstall; the front end of the protective sleeve is nested at the torpedo part at the top of the headstall, 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 headstall by a limit screw.

Preferably, the protective sleeve is provided with an axial first through groove, and the width of the first through groove is larger than the diameter of the cable.

Further, a lock nut is nested on the peripheral surface of the front end of the protective sleeve, the peripheral surface of the front end of the protective sleeve is in threaded connection with the lock nut, and a second through groove with the same width as the through groove is axially formed in the lock nut.

Preferably, the rear end of the protective sleeve is radially connected with the headstall by a limit screw.

Further, the total shearing force of the limit screw after radial connection is more than 30% of the shearing force of the tension rod.

Preferably, the rear end of the protective sleeve is provided with a limiting screw hole, the position of the limiting screw hole corresponds to the position of the oil injection spring observation hole of the headstall, and the limiting screw hole and the oil injection spring observation hole are radially connected by adopting a limiting screw.

Further, the number of the limit screw holes is multiple, and the limit screw holes are uniformly distributed on the peripheral surface of the protective sleeve.

Further, the number of limit screw holes is two or four.

Compared with the prior art, the invention has the following beneficial effects:

when the headstock is used for hoisting the instrument, if the headstock is clamped on a derrick anchor way or a position to cause the headstock tension rod to be disconnected instantaneously, the headstock protective sleeve can play a role in protecting the well logging instrument from falling off instantaneously through the comprehensive effect of top limit and bottom limit, and the cable is prevented from carrying the torpedo to be separated from the instrument below the headstock, so that the well logging instrument falls down or the drill floor falls down or the instrument falls down to injure workers. When the whole protective sheath plays the guard action, stop screw of protective sheath bottom passes through the protective sheath, firmly locks the headstall pulling force stick position in the inside, and the top diameter of protective sheath is less than the diameter of torpedo again, and the pulling force stick just in time is connected into an integral with the torpedo, has prevented that disconnected pulling force stick and torpedo from taking off in the headstall shell. After the protection device is installed, when the headstall is hoisted and connected with a logging instrument, the purposes of safe hoisting, orderly construction and elimination of major hidden danger are achieved.

Further, the first through groove of the axial direction of the protective sleeve can be used for sleeving the protective sleeve on the cable along the first through groove of the protective sleeve from the cable at the upper end of the torpedo, pushing down along the cable and the torpedo and sleeving on the headstock body, so that the installation is convenient, and the headstock is not required to be installed in advance.

Further, lock nut can twist half circle, seals first logical groove, and the purpose is with cable and torpedo lock in the protective sheath, and the protective sheath groove cuts the cable when avoiding hoisting instrument. Another effect of the lock nut is that if the tension rod is broken, the impact force of the instrument falling instantaneously is very likely to spread the top of the protective sleeve, and the lock nut can play a role in preventing spreading.

Drawings

FIG. 1 is a schematic diagram of the headstall vulnerability anti-disconnection protection device of the present invention;

figure 2 is a cross-sectional view of the headstall weakness protection apparatus of the present invention.

Wherein: 1-a protective sleeve; 2-locking nuts; 3-limiting screw holes; 4-a first through groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Unless defined otherwise, 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 belongs. The terminology used herein in the description of the 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.

As shown in fig. 1 and 2, the protection device for preventing the broken of the trunk weaknesses according to the invention comprises a protection sleeve 1 and a locking nut 2.

The inner cavity of the protective sleeve 1 is hollow, the shape of the inner cavity of the protective sleeve 1 is the same as the outer shape of the headstall, and the protective sleeve 1 is nested outside the headstall; the front end of the protective sleeve 1 is nested at the torpedo part at the top of the headstall, the inner diameter of the front end of the inner cavity of the protective sleeve 1 is smaller than the outer diameter of the top of the torpedo, and the rear end of the protective sleeve 1 is radially connected with the headstall by adopting a limit screw.

The protection sleeve 1 is provided with an axial first through groove 4, and the width of the first through groove 4 is larger than the diameter of the cable and is used for being sleeved on the horse cage head from the cable.

The lock nut 2 is nested on the peripheral surface of the front end of the protective sleeve 1, the peripheral surface of the front end of the protective sleeve 1 is in threaded connection with the lock nut 2, and the lock nut 2 is axially provided with a second through groove with the same width as the through groove 4.

The rear end of the protective sleeve 1 is provided with a limiting screw hole 3, the position of the limiting screw hole 3 corresponds to the oiling spring observation hole of the headstall, and the limiting screw is radially connected with the limiting screw hole 3 and the oiling spring observation hole.

The number of the limit screw holes 3 is a plurality of, and the limit screw holes are uniformly distributed on the peripheral surface of the protective sleeve 1. The number of the limiting screw holes 3 is two or four, and the number of the limiting screw holes 3 is four in the embodiment.

Before the instrument is connected to the well head, first the cable of protective sheath 1 follow the first logical groove 4 department of protective sheath with the cable of fish torpedo upper end and overlap on the headstock body along cable, fish torpedo push down. And when the two ends of the protective sleeve 1 are flush with the four oiling spring observation holes of the headstall body, 2 or 4 limiting screws are installed, at least two screws with the relative positions of 180 degrees are required to be installed, and the total shearing force of the installed limiting screws is more than 30% of the shearing force of the pulling force rod. At this point, the top position of the protective sleeve 1 of the headstall is flush with the headstall torpedo top spring. The internal shape of the spring is consistent with the shape of the spring at the top of the bridle torpedo. The diameter of the device is smaller than the diameter of the top of the headstall torpedo, and the limiting purpose can be achieved by utilizing the limiting diameter. The upper end of the headstock protective sleeve is also provided with a top lock nut 2, and the lock nut 2 is axially provided with a second through groove with the same width as the through groove 4. After the protective sleeve 1 is installed, the top lock nut 2 is lightly screwed for half a circle to seal the first through groove 4, so that the cable and the torpedo lock are locked in the protective sleeve, and the first through groove 4 of the protective sleeve 1 cuts the cable when the instrument is prevented from being hoisted. Another effect of the lock nut is that if the tension rod is broken, the impact force of the instrument falling instantaneously is very likely to spread the top of the protective sleeve 1, and the lock nut 2 can play a role in preventing spreading.

The protection process of the protection sleeve 1 is that when the instrument is hoisted by utilizing the headstock, if the headstock is broken in the moment when the headstock is clamped on a derrick anchor road or a certain position, the protection sleeve 1 of the headstock can play a role in protecting the logging instrument from falling off in the moment through the comprehensive effect of top diameter limiting and bottom limiting, and the cable is prevented from carrying the torpedo to separate from the instrument below the headstock, so that the logging instrument falls down or the drilling platform or the instrument falls down to smash the accident of the staff. When the whole protective sleeve 1 plays a role in protection, the limit screw at the bottom of the protective sleeve is firmly used for locking the position of the pulling rod of the headstall into the protective sleeve 1, the diameter of the top of the protective sleeve 1 is smaller than that of the torpedo, the pulling rod and the torpedo are just connected into a whole, and the broken pulling rod and the torpedo are prevented from falling out of the headstall shell. After the protection device is installed, when the headstall is hoisted and connected with a logging instrument, the purposes of safe hoisting, orderly construction and elimination of major hidden danger are achieved.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant not be considered to be a part of the disclosed subject matter.

Claims (8)

1. The device for protecting the broken-off of the weak point of the headstall is characterized by comprising a protective sleeve (1);

the inner part of the protective sleeve (1) is hollow to form an inner cavity, the shape of the inner cavity of the protective sleeve (1) is the same as the outer shape of the headstall, and the protective sleeve (1) is nested outside the headstall; the front end of the protective sleeve (1) is nested at the torpedo part at the top of the headstall, the inner diameter of the front end of the inner cavity of the protective sleeve (1) is smaller than the outer diameter of the top of the torpedo, and the rear end of the protective sleeve (1) is connected with the headstall by a limit screw.

2. The headstall weakness breaking protection device according to claim 1, characterized in that the protective sleeve (1) is provided with an axial first through groove (4), the first through groove (4) being wider than the cable diameter.

3. The headstall weakness breakage-proof protection device according to claim 2, characterized in that a lock nut (2) is nested on the peripheral surface of the front end of the protective sleeve (1), the peripheral surface of the front end of the protective sleeve (1) is in threaded connection with the lock nut (2), and the lock nut (2) is axially provided with a second through groove with the same width as the through groove (4).

4. The device for protecting a headstall from weaknesses according to claim 1, characterized in that the rear end of the protective sleeve (1) is radially connected with the headstall by means of a limit screw.

5. The headstall weakness protection apparatus of claim 4, wherein the total shear force after radial attachment of the stop screw is greater than 30% of the shear force of the tension rod.

6. The headstall weakness breakage-proof protection device according to claim 1, characterized in that the rear end of the protective sleeve (1) is provided with a limit screw hole (3), the position of the limit screw hole (3) corresponds to the position of the headstall oiling spring observation hole, and the limit screw hole (3) and the oiling spring observation hole are radially connected by a limit screw.

7. The headstall weakness breakage prevention protection device according to claim 6, characterized in that the number of limiting screw holes (3) is plural and evenly distributed on the circumference of the protective cover (1).

8. The headstall vulnerability anti-break protection device according to claim 6, characterized in that the number of limit screw holes (3) is two or four.