Elevator capable of observing position of slip

Abstract

The utility model discloses an elevator capable of observing the position of a slip, which relates to the technical field of petroleum drilling equipment and comprises an upper cover, an elevator shell, two horizontal balance beams, a connecting rod, a slip body and four power cylinders. Each shell is fixedly connected with a horizontal balance beam, each slip is driven by a corresponding power cylinder, a driving output shaft of each power cylinder is fixedly connected with one end of the horizontal balance beam, the horizontal balance beam is connected with the corresponding slip body through a connecting piece, an opening observation groove is formed in the upper cover, and screws and nuts are installed in the opening observation groove. The upper cover is fixedly connected with the horizontal balance beam through a nut and a screw. The perforated observation groove is formed in the middle of the upper cover and provided with the marked screw, and the position of the slip body is determined by observing the position of the screw, so that whether a tubular column is loosened or clamped or not is accurately judged, and potential safety hazards of operation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to an elevator capable of observing the position of slips. Background Art

[0002] The existing elevators used in the casing lowering operation have safety hazards in the movement of the slips. In addition, since the upper cover and the shell are closed, the position of the slips cannot be seen during casing lowering. When the power is insufficient or the reversing valve is damaged, it is very likely that the reversing valve is clamped or loosened, which is not actually in place, posing a great safety hazard. Therefore, it is necessary to develop an elevator that can observe the position of the slips to solve the above problems. Utility Model Content

[0003] The utility model aims at one or more of the above existing problems and provides an elevator capable of observing the position of slips.

[0004] According to one aspect of the utility model, there is provided an elevator card for observing the position of a slip, comprising an upper cover, an elevator card shell, two horizontal balance beams, a connecting rod, a slip body and four power cylinders, wherein the slip body is a four-piece slip body, and the elevator card shell is hinged by two identical shells, each shell is fixedly connected to a horizontal balance beam, each slip is driven by a corresponding power cylinder, and a driving output shaft of each power cylinder is fixedly connected to one end of the horizontal balance beam, and the horizontal balance beam is connected to the corresponding slip body through a connecting piece, and an open hole observation slot is opened on the upper cover, and screws and nuts are installed in the open hole observation slot, and the upper cover is fixedly connected to the horizontal balance beam through nuts and screws.

[0005] Preferably, the opening is a waist-shaped slot hole, the screw is a marked screw, and threaded holes are provided below the waist-shaped slot hole and on the horizontal balance beam. The screw passes through the threaded holes of the waist-shaped slot hole and the threaded holes of the horizontal balance beam and is fixed by a nut. The nut is also used to adjust the position of the screw extending out of the opening observation slot.

[0006] Preferably, the perforated observation slot includes an ascending mark position and a descending mark position, the ascending mark position is located at the upper end of the perforated observation slot, and the descending mark position is located at the upper end of the perforated observation slot 8.

[0007] Preferably, lifting ears are provided on both sides of the upper cover.

[0008] Preferably, a lower guide cover is installed at the lower end of the hanging card housing.

[0009] Preferably, the connecting member is a connecting rod, one end of which is connected to the balance beam, and the other end of which is connected to the slip body.

[0010] The beneficial effects of the utility model are:

[0011] The utility model provides an elevator card capable of observing the position of the slip, which has a reasonable and simple structure. In the present application, two symmetrically arranged horizontal balance beams cooperate with four power cylinders to ensure the synchronous action of the power cylinders, and to ensure that the slip body will not be eccentric or self-locked, so that the slip body moves consistently when it is lifted and released, and an observation slot with an opening is arranged in the middle of the upper cover, so as to facilitate the observation of the position of the horizontal balance beam. At the same time, by installing a marked screw on the horizontal balance beam corresponding to the position of the opening of the upper cover, the position of the slip body can be determined by observing the position of the screw, so as to accurately judge whether the pipe column is loosened and clamped, and ensure the hidden dangers of operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A front view of an elevator for observing the position of slips;

[0013] Figure 2 The figure is a schematic diagram of the structure of half of an elevator capable of observing the position of slips;

[0014] Figure 3 for Figure 2 A cross-sectional structural diagram of an elevator capable of observing the position of slips. DETAILED DESCRIPTION

[0015] The technical solution of the application is further described in detail below with reference to the accompanying drawings.

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0018] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0019] Embodiment 1

[0020] like Figure 1-3As shown, the utility model provides an elevator card capable of observing the position of a slip, comprising an upper cover 1, an elevator card housing 5, two horizontal balance beams 2, a slip body 6 and four power cylinders 4. The slip body 6 is a four-piece slip body. The elevator card housing 5 is hinged by two identical housings, each housing is fixedly connected to a horizontal balance beam 2, and each slip body 6 is driven by a corresponding power cylinder 4. The driving output shaft of each power cylinder 4 is fixedly connected to one end of the horizontal balance beam 2, and the horizontal balance beam 2 is connected to the corresponding slip body 6 through a connecting piece. Lifting ears 11 are provided on both sides of the elevator card housing 2, and a lower guide cover 12 is installed at the lower end of the elevator card housing. The connecting piece in the present application is a connecting rod 3, one end of the connecting rod 3 is connected to the balance beam 2, and the other end of the connecting rod 3 is connected to the slip body 6. Thus, the four power cylinders are connected to the slip body through two interlocking balance beams and the connecting rod to ensure the synchronous action of the power cylinders. An open observation slot 8 is provided on the upper cover 1 , and screws 9 and nuts 10 are installed in the open observation slot 8 . The upper cover 1 is fixedly connected to the horizontal balance beam 2 through the nuts 10 and the screws 9 .

[0021] Therefore, the present application provides an elevator card capable of observing the position of a slip, which has the characteristics of simple structure, convenient operation, safety and reliability, and is particularly suitable for an elevator card used in the process of casing lowering operation. The elevator card adopts a four-piece slip body structure, and a tooth plate is installed on the slip body. The lifting and lowering of the slip body is controlled by four power cylinders to realize the loosening and clamping of the pipe column. The slip in the present application is suspended on two interlocking horizontal balance beams, and is connected to the four power cylinders through two symmetrically arranged horizontal balance beams. The synchronous action of the power cylinders ensures that the slip body will not be eccentric and self-locking, so that the slip body moves consistently when lifting and loosening and lowering, and an observation slot with an opening is set in the middle position of the upper cover, so as to facilitate the observation of the position of the horizontal balance beam. A marked screw is installed on the horizontal balance beam corresponding to the position of the opening of the upper cover, and the position of the slip body can be determined by observing the position of the screw, so as to accurately judge whether the pipe column is loosened and clamped.

[0022] Specifically, the perforated observation slot 8 is a waist-shaped slot, and the screw 9 is a marked screw. The head of the screw 9 in the present application is painted with yellow paint for marking. Threaded holes are provided below the waist-shaped slot and on the horizontal balance beam 2. The screw 9 passes through the threaded holes of the waist-shaped slot and the threaded holes of the horizontal balance beam, and is fixed by a nut 10. The nut 10 is also used to adjust the position of the screw 9 extending out of the perforated observation slot 8. The perforated observation slot 8 includes an ascending mark position 8.1 and a descending mark position 8.2. The ascending mark position 8.1 is located at the upper end of the perforated observation slot 8, and the descending mark position 8.2 is located at the upper end of the perforated observation slot 8.

[0023] In the present application, a waist-shaped slot is opened in the middle position of the upper cover, and a mark for the rising and falling positions of the slip is installed on the right side of the slot, so that marked screws and nuts are installed on the horizontal balance beam corresponding to the opening position of the upper cover. The nut can adjust the protruding length of the marked screw. The position of the slip is determined by observing the position of the screw, so as to accurately judge whether the pipe column is loosened and clamped, and the safety of the casing lowering operation is fully guaranteed.

[0024] Principle description: The reversing valve and the slip are fixedly connected. When the reversing valve is operated to rise, the marked screw will reach the slip rising mark position along with the balance beam, and the slip is loosened; conversely, when the reversing valve is operated to descend, the screw will reach the slip descending mark position 8 along with the horizontal balance beam, and the slip is clamped. When lowering the casing, the operator can accurately judge whether the pipe string is loosened or clamped by observing whether the marked screw installed on the horizontal balance beam reaches the slip rising mark position and the descending mark position. When there is insufficient power or the reversing valve is damaged, the position of the screw can also be observed to judge whether the pipe string is loosened or clamped, which fully guarantees the safety of the casing lowering operation.

[0025] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. An elevator capable of observing the position of slips, characterized in that: The invention comprises an upper cover (1), an elevator housing (5), two horizontal balance beams (2), a slip body (6) and four power cylinders (4). The slip body (6) is a four-piece slip body. The elevator housing (5) is formed by hingedly connecting two identical housings. Each housing is fixedly connected to a horizontal balance beam (2). Each slip body (6) is driven by a corresponding power cylinder (4). The drive output shaft of each power cylinder (4) is fixedly connected to one end of the horizontal balance beam (2). The horizontal balance beam (2) is connected to the corresponding slip body (6) through a connecting piece. An open hole observation slot (8) is provided on the upper cover (1). A screw (9) and a nut (10) are installed on the open hole observation slot (8). The upper cover (1) is fixedly connected to the horizontal balance beam (2) through the nut (10) and the screw (9).

2. The elevator capable of observing the position of slips according to claim 1, characterized in that: The perforated observation slot (8) is a waist-shaped slot hole, the screw (9) is a marked screw, threaded holes are arranged below the waist-shaped slot hole and on the horizontal balance beam (2), the screw (9) passes through the threaded hole of the waist-shaped slot hole and the threaded hole of the horizontal balance beam, and is fixed by the nut (10), and the nut (10) is also used to adjust the position of the screw (9) extending out of the perforated observation slot (8).

3. The elevator capable of observing the position of slips according to claim 2, characterized in that: The perforated observation slot (8) comprises an ascending mark position (8.1) and a descending mark position (8.2), wherein the ascending mark position (8.1) is located at the upper end of the perforated observation slot (8), and the descending mark position (8.2) is located at the upper end of the perforated observation slot (8).

4. The elevator capable of observing the position of slips according to claim 1, characterized in that: The connecting member is a connecting rod (3), one end of the connecting rod (3) is connected to the horizontal balance beam (2), and the other end of the connecting rod (3) is connected to the slip body (6).

5. The elevator capable of observing the position of slips according to claim 1, characterized in that: Lifting ears (11) are provided on both sides of the hanging card housing (5).

6. The elevator capable of observing the position of slips according to claim 1, characterized in that: A lower guide cover (12) is installed at the lower end of the hanging card housing.

Images