A single drill pipe assisted elevator

Abstract

The application discloses a single drill auxiliary elevator, and relates to the technical field of auxiliary equipment for oil drilling and well repairing, which comprises a liquid cylinder, a jaw plate and an integrated shell, further comprises a blocking rod, a torsion spring I for resetting the jaw plate, a torsion spring II for resetting the blocking rod, and an upper inner liner, a jaw plate opening-stopping mechanism and a lower inner liner which are sequentially arranged from top to bottom and can be used for simultaneously putting or taking out the drill, the upper inner liner is detachably installed above the shell, the lower inner liner and the jaw plate opening-stopping mechanism are both detachably installed in the inner cavity of the shell, the liquid cylinder and the blocking rod are sequentially and linkingly matched with the jaw plate to form a group of jaw plate opening-stopping mechanisms, and the jaw plate opening-stopping mechanisms are symmetrically provided with two groups. The application is applicable to various different specifications of drills, and forms the combination of the mechanical lock and the hydraulic lock of the jaw plate, realizes multiple safety designs, and greatly improves the overall operation safety and reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling and workover auxiliary equipment, in particular to a single drill auxiliary elevator. BACKGROUND

[0002] The single drill auxiliary elevator, also known as a single auxiliary elevator, is a tool for suspending single casing, tubing and other drilling tools in oil, gas and cementing operations. The traditional single auxiliary elevator adopts a manual split type operation. When suspending a single drilling tool, the operator often needs to manually fasten and manually insert a safety latch. The low operation efficiency also poses a certain risk in safety, such as not fully inserting the latch or the latch falling off after insertion due to vibration, etc. These can cause the left and right shell bodies of the elevator to open, the drilling tool to fall off and thus cause loss of personnel or property.

[0003] However, Chinese Patent No. CN217176532U discloses an open type power tong head with hydraulic cylinder lever clamping. The document proposes that "it comprises a tong head opening large gear, a single rod hydraulic cylinder, a clamping arm, a shaft, a latch, a front jaw plate assembly, a torsional spring, a clamping arm automatic reset mechanism, a rear jaw plate assembly and a limiting block. The single rod hydraulic cylinder, the clamping arm, the shaft and the latch constitute a hydraulic cylinder driven lever clamping mechanism. The hydraulic cylinder driven lever clamping mechanism is arranged symmetrically along the axis A-A of the tong head opening large gear opening in the inner cavity of the tong head opening large gear".

[0004] Although the existing technology achieves automatic opening and closing of the jaw plate to a certain extent and solves the safety problem of the latch and the left and right shell bodies through the cooperation of the integrated shell and the hydraulic driven jaw plate, the power tong head of the existing technology, when used as an elevator structure, relies entirely on the oil cylinder to hold the drilling tool and relies entirely on friction to counteract gravity. Once the clamping force is not enough or the drilling tool is too heavy, for example, if the hydraulic system leaks, the drilling tool is likely to fall off. The overall operation safety and reliability are still general. At the same time, the existing technology still cannot ensure that it is suitable for drilling tools of various specifications, and the overall applicability is also general.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a single drill auxiliary elevator to solve the problem of the single drill auxiliary elevator at the present stage as proposed in the background art, which has general overall operation safety and reliability while being hydraulically driven and automatically operated, cannot ensure that it is suitable for drilling tools of various specifications, and has general overall applicability.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The single drill tool auxiliary elevator comprises an integrated shell, a liquid cylinder, a jaw plate, a stop rod, a torsion spring I for resetting the jaw plate, a torsion spring II for resetting the stop rod, and an upper inner liner, a jaw plate opening stop mechanism and a lower inner liner arranged from top to bottom and capable of simultaneously putting or taking out the drill tool, the upper inner liner is detachably mounted above the shell, the lower inner liner and the jaw plate opening stop mechanism are both detachably mounted in the inner cavity of the shell, the liquid cylinder, the stop rod and the jaw plate are sequentially and linkingly matched to form a group of jaw plate opening stop mechanisms, and the jaw plate opening stop mechanism is symmetrically provided with two groups, and the outer side of the shell is symmetrically formed with lifting lugs.

[0009] Further, the torsion spring I is screw-connected to the inner side of the shell, one side of each torsion spring I abuts against the outer side of the rear end of the corresponding jaw plate, the other side of each torsion spring I abuts against the inner side of the shell, each torsion spring II and the corresponding stop rod are coaxially screw-connected to the inner side of the shell, the stop rod is a wedge-shaped stop rod, and each stop rod is formed with a wedge surface near one side of the corresponding jaw plate, capable of abutting and matching with the head of the jaw plate, the rear end of each stop rod is hingedly connected with the end of the piston rod of the corresponding liquid cylinder, the cylinder body of the liquid cylinder is hingedly connected with a T-shaped liquid cylinder support, the liquid cylinder support penetrates the shell and is bolted to the rear of the shell, each stop rod is formed with a boss near one side of the corresponding torsion spring II, one side of each torsion spring II abuts against the outer side of the boss of the corresponding stop rod, and the other side of each torsion spring II abuts against the inner side of the shell.

[0010] Further, the jaw plate is a plate member with an inwardly opening arc-shaped structure, the upper inner liner and the lower inner liner are plate members with an inwardly opening U-shaped structure, and the shell is a three-dimensional member with an inwardly opening U-shaped structure, the upper ends of the shell are formed with circular bosses, the lower ends of the circular bosses are formed with semicircular notches facing the inner side, the two end portions and the middle position of the upper inner liner are respectively inserted into the three semicircular notches, the upper side of the shell is further symmetrically formed with two trapezoidal bosses, the trapezoidal bosses are both installed with a hand-operated locking mechanism I, the left and right sides of the upper inner liner are both connected with upper inner liner bolts, the upper inner liner bolts penetrate the jaw plate, the hand-operated locking mechanism I vertically abuts against the upper inner liner bolt, the two end portions and the middle position of the inner cavity of the shell are both formed with inwardly opening fan-shaped grooves, the two end portions and the middle position of the lower inner liner are respectively inserted into the three fan-shaped grooves, the left and right sides of the lower inner liner are both vertically abutted with a hand-operated locking mechanism II, and the hand-operated locking mechanism II is installed on the shell.

[0011] Further, the hand-pulling type locking mechanism I and the hand-pulling type locking mechanism II both comprise a pull pin, the pull pin is in two-stage stepped structure of large front and small rear, a spring and a threaded sleeve are sequentially sleeved on the small diameter section of the pull pin from front to rear, the threaded sleeve is also in two-stage stepped structure of large front and small rear, a stop washer and a nut are sequentially sleeved on the small diameter section of the threaded sleeve from front to rear, a U-shaped handle and a safety pin for locking the U-shaped handle are sequentially arranged at the rear side of the nut, the U-shaped handle and the safety pin are both connected to the small diameter section of the pull pin through the small diameter section of the threaded sleeve;

[0012] Further, the upper inner lining plug is in two-stage stepped structure of large upper and small lower, the left and right sides of the upper inner lining are sequentially provided with arc-shaped notches I matched with the small diameter section of the upper inner lining plug, the shell and the jaw plate are sequentially provided with through holes I and through holes II for the small diameter section of the upper inner lining plug to pass through, the trapezoidal boss is sequentially provided with arc-shaped notches II matched with the large diameter section of the upper inner lining plug on the side close to the upper inner lining plug, the trapezoidal boss is sequentially provided with through holes III for the large diameter section of the pull pin, the spring and the threaded sleeve of the hand-pulling type locking mechanism I to pass through, the nut of the hand-pulling type locking mechanism I is sequentially abutted to the side of the trapezoidal boss away from the upper inner lining plug through the stop washer, the large diameter section of the upper inner lining plug is sequentially provided with through holes IV matched with the large diameter section of the pull pin on the side close to the pull pin of the hand-pulling type locking mechanism I, the large diameter section of the pull pin of the hand-pulling type locking mechanism I is sequentially perpendicularly abutted to the large diameter section of the upper inner lining plug through the through holes IV, the left and right sides of the lower inner lining are sequentially provided with square notches matched with the large diameter section of the pull pin of the hand-pulling type locking mechanism II, the left and right sides of the shell are sequentially provided with through holes V for the large diameter section of the pull pin, the spring and the threaded sleeve of the hand-pulling type locking mechanism II to pass through, the nut of the hand-pulling type locking mechanism II is sequentially abutted to the outer side of the shell through the stop washer.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. The present application is provided with a jaw plate for holding the drilling tool in the inner cavity of the shell, and an upper lining and a lower lining are respectively provided above the shell and below the jaw plate in the inner cavity of the shell, the coupling of the drilling tool can be seated above the upper lining, and the upper lining and the lower lining can greatly improve the carrying capacity of the elevator by cooperating with the jaw plate, thereby greatly improving the overall operation safety and reliability, and the jaw plate, the upper lining and the lower lining are detachably connected with the shell and can be replaced, thereby reducing the cost investment and being suitable for various specifications of drilling tools, thereby greatly improving the overall applicability, and on this basis, the jaw plate can be opened by the torsion spring I for resetting the jaw plate and closed by the impact of the drilling tool, and the jaw plate stop opening mechanism formed by the linkage of the liquid cylinder, the stop lever and the jaw plate in sequence and the torsion spring II for resetting the stop lever are cooperatively arranged, thereby forming the combination of the mechanical lock and the hydraulic lock of the jaw plate, thereby further improving the overall operation safety and reliability;

[0015] 2. The present application is provided with the hydraulic lock of the jaw plate by the cooperative arrangement of the liquid cylinder, the stop lever and the jaw plate, that is, the piston rod of the liquid cylinder is extended to drive the stop lever to rotate, so that the wedge surface of the stop lever is rotated to abut against the head of the rotating jaw plate to lock the jaw plate and prevent the jaw plate from opening, and on this basis, the present application is provided with the mechanical lock of the jaw plate by the cooperative arrangement of the torsion spring II, that is, once the liquid cylinder fails, the torsion spring II can still rotate the stop lever counterclockwise, so that the wedge surface of the stop lever is rotated to abut against the head of the rotating jaw plate to lock the jaw plate and prevent the jaw plate from opening, thereby effectively realizing multiple safety designs and improving the overall operation safety and reliability;

[0016] 3. The present application is provided with the upper lining bolt which can prevent the side edge of the upper lining from being pulled out, and the cooperative arrangement of the upper lining bolt and the hand-operated locking mechanism I which is vertically abutted against the upper lining bolt can facilitate the rotation of the jaw plate and effectively improve the stability and reliability of the connection and installation of the upper lining and the shell, and at the same time, the cooperative arrangement of the hand-operated locking mechanism II which cooperates with the lower lining can effectively improve the stability and reliability of the connection and installation of the lower lining and the shell, thereby further realizing multiple safety designs and improving the overall operation safety and reliability;

[0017] 4. The hand-operated locking mechanism I and the hand-operated locking mechanism II in the present application are both composed of the cooperative action of the pull pin, the spring, the threaded sleeve, the stop washer, the nut, the U-shaped handle and the pin, and the two can be abutted against the upper lining bolt and the lower lining by the pull pin, and after the pin for locking the U-shaped handle is removed, the U-shaped handle can be pulled to drive the pull pin, thereby realizing the insertion and pulling of the upper lining bolt and the replacement of the lower lining, and finally realizing the replacement of the upper lining, the jaw plate and the lower lining, thereby effectively ensuring the overall operation safety and reliability and further ensuring the suitability for various specifications of drilling tools;

[0018] 5. The upper lining, the lower lining and the jaw plate in the present application can be replaced, and compared with the existing hanger which can only replace the jaw plate, the applicability for various specifications of drilling tools is further enhanced;

[0019] 6. The upper lining, the lower lining and the jaw plate in the present application are all plate members, compared with various specifications of single drilling tool auxiliary hangers, the occupied field operation space is further reduced under the premise of not affecting the working type, so that the safety space of the hanger is increased, and the operation safety and reliability of the hanger are effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the isometric view of the present application;

[0021] Figure 2 is the schematic diagram of explosion of the present application;

[0022] Figure 3 is the left sectional schematic diagram of the present application;

[0023] Figure 4 is the transverse sectional view of the jaw plate before opening of the present application;

[0024] Figure 5 is the transverse sectional view of the jaw plate after opening of the present application;

[0025] Figure 6 is the schematic diagram of working principle of the jaw plate of the present application;

[0026] Figure 7 is the installation schematic diagram of the lower lining of the present application;

[0027] Figure 8 is the structural schematic diagram of the hand-pulled locking mechanism I of the present application;

[0028] Figure 9 is the schematic diagram of explosion of the present application; Figure 8

[0029] Figure 10 is the structural schematic diagram of the hand-pulled locking mechanism II of the present application;

[0030] Figure 11 is the schematic diagram of explosion of the present application; Figure 10

[0031] Figure 12 is the structural schematic diagram of the file lever of the present application;

[0032] ​​Fig. 1: 1, hydraulic cylinder, 2, lifting lug, 3, torsion spring I, 4, torsion spring II, 5, shell, 51, through hole I, 52, through hole V, 6, jaw plate, 61, through hole II, 7, stop lever, 71, wedge surface, 72, boss, 8, upper inner liner, 81, arc-shaped notch I, 9, lower inner liner, 91, square-shaped notch, 10, circular boss, 101, semicircular notch, 11, fan-shaped recess, 12, trapezoidal boss, 121, arc-shaped notch II, 122, through hole III, 13, upper inner liner insertion pin, 131, through hole IV, 14, hand-pulled locking mechanism I, 141, pull pin I, 142, spring I, 143, threaded sleeve I, 144, stop washer I, 145, nut I, 146, U-shaped handle I, 147, pin I, 15, hand-pulled locking mechanism II, 151, pull pin II, 152, spring II, 153, threaded sleeve II, 154, stop washer II, 155, nut II, 156, U-shaped handle II, 157, pin II, 16, stroke valve, 17, hydraulic cylinder support. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application.

[0034] Please refer to Figures 1-12 which shows a single drill string auxiliary elevator, comprising a shell 5, an upper inner liner 8, a lower inner liner 9, and two upper inner liner insertion pins 13, two jaw plates 6, two jaw plate stop opening mechanisms, two torsion springs I 3, two torsion springs II 4, two hand-pulled locking mechanisms I 14, two hand-pulled locking mechanisms II 15 and two hydraulic cylinders 1 (the basic structure such as the hydraulic control system of the existing hydraulic elevator is not specifically described here, and is not shown in detail in the figure, but the function implementation should not be limited thereby), the shell 5 is an integral inward-opening U-shaped structure and is a three-dimensional piece, the outer sides of the shell 5 are left-right symmetrical and form lifting lugs 2, the upper inner liner 8 and the lower inner liner 9 are both inward-opening U-shaped structures and are plate pieces (the inner sides of the upper inner liner 8 and the lower inner liner 9 respectively form U-shaped structure installation cavities for placing or withdrawing the drill string), the jaw plates 6 are both inward-opening arc-shaped structures and are plate pieces (the two jaw plates 6 jointly enclose a circular structure installation cavity for placing or withdrawing the drill string), the inner sides of the upper inner liner 8, the jaw plates 6 and the lower inner liner 9 are inwardly protruding relative to the inner side of the shell;

[0035] Further, the upper two ends and the middle position of the shell 5 are formed with circular bosses 10, the lower ends of the circular bosses 10 are each provided with a semicircular notch 101 towards the inside, the two ends and the middle position of the upper lining 8 are respectively inserted into the three semicircular notches 101, the upper left and right of the shell 5 are symmetrically formed with two trapezoidal bosses 12, the left and right sides of the upper lining 8, the left and right sides of the shell 5, the jaw plate 6, the hand-pulled locking mechanism I 14 and the trapezoidal boss 12 are all correspondingly matched with the upper lining bolt 13, the left and right sides of the upper lining 8 are symmetrically provided with arc-shaped notches I 81, the upper left and right of the shell 5 are symmetrically provided with through holes I 151, the jaw plate 6 is provided with through holes II 661, the upper lining bolt 13 is in a two-section stepped structure with the upper part being larger and the lower part being smaller, the small diameter section of each upper lining bolt 13 passes through the corresponding through hole I 151 and the through hole II 661, the large diameter section of each upper lining bolt 13 is clamped with the corresponding arc-shaped notch I 81, the hand-pulled locking mechanism I 14 is composed of a pull pin I 141, a spring I 142, a threaded sleeve I 143, a stop washer I 144, a nut I 145, a U-shaped handle I 146 and a pin I 147 for locking the U-shaped handle I 146, the pull pin I 141 is in a two-section stepped structure with the front part being larger and the rear part being smaller, the small diameter section of the pull pin I 141 is sequentially sleeved with the spring I 142 and the threaded sleeve I 143 from front to rear, the threaded sleeve I 143 is also in a two-section stepped structure with the front part being larger and the rear part being smaller, the small diameter section of the threaded sleeve I 143 is sequentially sleeved with the stop washer I 144 and the nut I 145 from front to rear, the rear side of the nut I 145 is sequentially provided with the U-shaped handle I 146 and the pin I 147 for locking the U-shaped handle I 146, the U-shaped handle I 146 and the pin I 147 are connected to the small diameter section of the pull pin I 141 through the small diameter section of the threaded sleeve I 143 (i.e. can be seen from the drawings), the small diameter section of the threaded sleeve I 143 is provided with a U-shaped groove matched with the U-shaped handle I 146 and a mounting hole matched with the pin I 147, the small diameter section of the pull pin I 141 is provided with a mounting hole matched with the U-shaped handle I 146 and a mounting hole matched with the pin I 147), the inside of each trapezoidal boss 12 is provided with a through hole III 122, the large diameter section of the corresponding pull pin I 141, spring I 142 and threaded sleeve I 143 passes through the through hole III 122, the large diameter section of each upper lining bolt 13 is provided with a through hole IV 131, and the large diameter section of each upper lining bolt 13 is vertically abutted with the large diameter section of the corresponding pull pin I 141 passing through the through hole III 122 through the through hole IV 131, each nut I 145 is abutted to the side of the corresponding trapezoidal boss 12 away from the upper lining bolt 13 through the front adjacent stop washer I 144, each trapezoidal boss 12 is provided with an arc-shaped notch II 121 on the side close to the corresponding upper lining bolt 13, and the large diameter section of each upper lining bolt 13 is clamped with the corresponding arc-shaped notch II 121. Figure 9

[0036] ​Furthermore, the left and right sides of the lower inner liner 9 correspond one-to-one with the hand-operated locking mechanism II15. The lower ends and middle of the inner cavity of the housing 5 each have inwardly opening fan-shaped grooves 11. The lower ends and middle of the lower inner liner 9 are respectively inserted into three fan-shaped grooves 11. The hand-operated locking mechanism II15 consists of a pull pin II151, a spring II152, a threaded sleeve II153, a stop washer II154, a nut II155, a U-shaped handle II156, and a pin II157 for locking the U-shaped handle II156. The pull pin II151 has a two-stage stepped design, wider at the front and narrower at the back. The structure consists of a spring II152 and a threaded sleeve II153 sequentially mounted on the small-diameter section of the pull pin II151 from front to back. The threaded sleeve II153 also has a two-stage stepped structure, wider at the front and narrower at the back. On the small-diameter section of the threaded sleeve II153, a locking washer II154 and a nut II155 are sequentially mounted from front to back. Adjacent to the rear side of the nut II155, a U-shaped handle II156 and a pin II157 for locking the U-shaped handle II156 are sequentially located. Both the U-shaped handle II156 and the pin II157 pass through the small-diameter section of the threaded sleeve II153 and connect to the small-diameter section of the pull pin II151 (i.e., as shown). Figure 11 As shown, a U-shaped groove for cooperating with the U-shaped handle II156 and a mounting hole for cooperating with the pin II157 are opened on the small diameter section of the threaded sleeve II153. A mounting hole for cooperating with the U-shaped handle II156 and a mounting hole for cooperating with the pin II157 are opened on the small diameter section of the pull pin II151. A through hole V52 for cooperating with the hand-pulled locking mechanism II15 is opened on the left and right sides of the housing 5. The pull pin II151, spring II152 and the large diameter section of the threaded sleeve II153 of each hand-pulled locking mechanism II15 are all inserted into the corresponding through hole V52. A square notch 91 is symmetrically opened on the outer edges of the left and right sides of the lower inner liner 9. After the large diameter section of each pull pin II151 passes through the through hole V52, it engages with the corresponding square notch 91. Each nut II155 is pressed against the outside of the housing 5 by the adjacent front stop washer II154.

[0037] Furthermore, torsion springs I3 and jaw plates 6 are matched one-to-one. Each torsion spring I3 is connected to the inner side of the housing 5 by a screw through its own center hole (the connecting screw can pass through the center hole of the torsion spring I3). One side of the torsion arm of each torsion spring I3 abuts against the outer rear end of the corresponding jaw plate 6, and the other side of the torsion arm of each torsion spring I3 abuts against the inner side of the housing 5. The stop rods 7 are all wedge-shaped. Torsion springs II4 and hydraulic cylinders 1 are matched one-to-one with the stop rods 7. Each torsion spring II4 and the corresponding stop rod 7 are connected to each other by a coaxial screw. Inside the housing 5 (at this time, one part of the stop bar 7 can be set as cylindrical, and the connecting screw can pass through the center hole of the torsion spring II4 and the cylindrical part of the stop bar 7 at the same time), each stop bar 7 has a boss 72 formed on the side near the corresponding torsion spring II4, and one side of the torsion arm of the corresponding torsion spring II4 abuts against the outside of the boss 72. The other side of the torsion arm of each torsion spring II4 abuts against the inside of the housing 5. Each stop bar 7 has a wedge-shaped surface 71 formed on the side near the corresponding jaw plate 6, and the wedge-shaped surface 71 abuts against the head of the jaw plate 6 (e.g., Figure 6 As shown, a conventional stroke valve 16 can be installed behind the jaw plate 6. The stroke valve 16 is bolted to the inside of the housing 5 so that when the jaw plate 6 is rotated into position, the stroke valve 16 can provide feedback to cooperate with the existing hydraulic control system and the hydraulic cylinder 1. The rear end of each stop rod 7 is hinged to the end of the piston rod of the corresponding hydraulic cylinder 1. The hydraulic cylinder 1 can adopt a three-way interface design, which has a position signal output port. The signal feedback can only be realized after the hydraulic cylinder 1 has fully reached the specific position, to prevent the sleeve from engaging before the stop rod 7 has fully limited the jaw plate 6, thus preventing the lifting from starting. The cylinder body of the hydraulic cylinder 1 is hinged with a T-shaped hydraulic cylinder bracket 17. The front end of each hydraulic cylinder bracket 17 penetrates through the housing 5, and the rear end of each hydraulic cylinder bracket 17 is bolted to the rear of the housing 5.

[0038] The workflow and working principle of this invention are as follows:

[0039] Lifting drill bit:

[0040] When the piston rod of hydraulic cylinder 1 is in the retracted state, the torsion spring I3 opens the tail of jaw plate 6, causing jaw plate 6 to be in the open state. When jaw plate 6 approaches the drill bit and impacts the drill bit, the drill bit collides with the inner arc surface of jaw plate 6, making jaw plate 6 concentric with housing 5 (i.e., the engagement is complete). At the same time, the tail of jaw plate 6 impacts stroke valve 16. After stroke valve 16 sends a closing signal, the piston rod of hydraulic cylinder 1 extends and drives the stop rod 7 to rotate. The stop rod 7 rotates to the head of jaw plate 6, blocking jaw plate 6 and preventing jaw plate 6 from opening, thereby preventing the drill bit from slipping. The drill bit and the lifting chuck can then be lifted (at this time, the drill bit coupling sits on the upper inner liner 8).

[0041] Loosen the sleeve:

[0042] The piston rod of the liquid cylinder 1 is retracted again, driving the shift lever 7 to rotate, and the shift lever 7 is away from the head of the jaw plate 6, and the elevator is away from the drilling tool, that is, the loosening of the drilling tool is completed.

[0043] In the above process, after the pin 147 is removed, the U-shaped handle 146 can be pulled to drive the pull pin 141 away from the upper lining plug 13, and then the upper lining plug 13 is pulled out, the upper lining 8 and the jaw plate 6 are replaced, and after the pin 157 is removed, the U-shaped handle 156 can be pulled to drive the pull pin 151 away from the square notch 91, and then the lower lining 9 is replaced; wherein, when the pin 147 is not removed, the U-shaped handle 146 cannot be pulled, and when the pin 157 is not removed, the U-shaped handle 156 cannot be pulled.

Claims

1. A single pipe auxiliary elevator comprising a fluid cylinder, a jaw plate, and an integral housing, characterized by, Also include the stop lever, for resetting the jaw torsional spring I, for resetting the stop lever torsional spring II, and can be simultaneously for the drill into or out of the upper and lower by the order of the upper liner, jaw stop open mechanism and the lower liner, the upper liner is detachable mounted on the upper shell, the lower liner and jaw stop open mechanism are detachable mounted in the inner cavity of the shell, the liquid cylinder, stop lever linkage and jaw in turn constitute a group of jaw stop open mechanism and jaw stop open mechanism left and right symmetrically provided with two groups, the upper shell left and right symmetrically formed with two trapezoidal boss, the trapezoidal boss is installed through the hand pull type locking mechanism I, the upper liner between the left and right sides and the shell are connected with the upper liner latch, the upper liner latch one to one through the jaw, the hand pull type locking mechanism I one to one corresponding vertical abutment on the upper liner latch, the left and right sides of the lower liner are vertically abutted with hand pull type locking mechanism II, the hand pull type locking mechanism II is installed through the shell, the hand pull type locking mechanism I and hand pull type locking mechanism II all include the draw pin, the draw pin is two stage ladder structure of big front small back, the draw pin small diameter section from front to back in turn with spring and threaded sleeve, the threaded sleeve also is two stage ladder structure of big front small back, the threaded sleeve small diameter section from front to back in turn with stop washer and nut, the rear side of the nut is adjacent position in turn provided with U-shaped handle, and the safety pin for locking U-shaped handle, the U-shaped handle and safety pin are connected to the draw pin small diameter section through the threaded sleeve small diameter section, the upper liner latch is two stage ladder structure of big down small, the left and right sides of the upper liner one to one corresponding with the upper liner latch small diameter section is provided with arc notch I, the shell and jaw are respectively one to one corresponding with the upper liner latch small diameter section through the through hole I and through hole II, the trapezoidal boss side close to the upper liner latch one to one corresponding with the upper liner latch big diameter section is provided with arc notch II, the trapezoidal boss inside one to one corresponding with the draw pin, spring and threaded sleeve big diameter section of hand pull type locking mechanism I through the through hole III, the nut of hand pull type locking mechanism I one to one corresponding through the stop washer abut to the side of trapezoidal boss away from the upper liner latch, the upper liner latch big diameter section side close to the draw pin of hand pull type locking mechanism I one to one corresponding with the draw pin big diameter section is provided with through hole IV, the draw pin big diameter section of hand pull type locking mechanism I one to one corresponding through the through hole IV vertical abutment on the upper liner latch big diameter section, the left and right sides of the lower liner one to one corresponding with the draw pin big diameter section of hand pull type locking mechanism II is provided with square notch, the left and right sides of the shell one to one corresponding with the draw pin, spring and threaded sleeve big diameter section of hand pull type locking mechanism II through the through hole V, the nut of hand pull type locking mechanism II one to one corresponding through the stop washer abut to the outside of the shell.

2. The single pipe auxiliary elevator of claim 1, wherein, The jaw plates are all arc-shaped plate members opening inward, the upper and lower inner liners are all U-shaped plate members opening inward, the shell is a U-shaped three-dimensional member opening inward, circular bosses are formed at the upper two ends of the shell, semicircular notches are formed at the lower ends of the circular bosses, the upper and lower ends and the middle position of the upper inner liner are respectively inserted into the three semicircular notches, semicircular notches are formed at the lower ends of the shell, the upper and lower ends and the middle position of the lower inner liner are respectively inserted into the three semicircular notches.

3. The single pipe auxiliary elevator of claim 1, wherein, The torsion springs I are all screw-connected to the inner side of the shell, one side of each torsion spring I abuts against the outer end of the corresponding jaw plate, and the other side of each torsion spring I abuts against the inner side of the shell.

4. The single pipe auxiliary elevator of claim 1, wherein, Each torsion spring II and the corresponding stop rod are coaxially screw-connected to the inner side of the shell, the stop rods are all wedge-shaped stop rods, each stop rod is formed with a wedge surface on the side close to the corresponding jaw plate, the wedge surface can abut against the head of the jaw plate, each stop rod is formed with a boss on the side close to the corresponding torsion spring II, one side of each torsion spring II abuts against the outer side of the boss of the corresponding stop rod, and the other side of each torsion spring II abuts against the inner side of the shell.

5. A single pipe auxiliary elevator as defined in claim 4 wherein, The rear end of each stop rod is hingedly connected with the piston rod end of the corresponding hydraulic cylinder, the cylinder body of the hydraulic cylinder is hingedly connected with a T-shaped hydraulic cylinder support, the hydraulic cylinder support penetrates through the shell and is bolted to the rear of the shell.

6. The single pipe auxiliary elevator of claim 1, wherein, The outer side of the shell is formed with left-right symmetrical lugs.

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