CN217462059U - Fastening device for bottom flange and double male buckle connectors of petroleum drilling well mouth - Google Patents

Abstract

The utility model belongs to the technical field of oil drilling engineering machine tool, concretely relates to oil drilling well head bottom flange and two pin joint locking device. The utility model discloses a: a middle shaft (1) and an actuating mechanism (2); the method is characterized in that: the lower end of the middle shaft (1) is in threaded connection with a central threaded hole (2012) of the driving disc (201), penetrates through a central hole of the shell (203), and is connected with the actuating mechanism (2) through a fixing nut (205), so that the middle shaft (1) and the actuating mechanism (2) are connected into a whole and are of an inverted T-shaped structure. The utility model provides an among the prior art well drilling scene end flange and two pin thread joint lock tightly buckle can't fasten with B type tongs, with the problem that there is the potential safety hazard of other manual methods lock, the utility model has the advantages of novel in design, convenient operation, safe in utilization.

Description

Fastening device for bottom flange and double male buckle connectors of petroleum drilling well mouth

Technical Field

The utility model belongs to the technical field of well drilling engineering machinery, concretely relates to oil drilling well head bottom flange and two pin joint locking device.

Background

And after the surface drilling is finished, the surface casing is put in, a connecting short section with double male buckles is arranged on the casing female buckle, one end of the connecting short section is connected with the casing female buckle at the uppermost end of the casing, and the other end of the connecting short section is connected with the female buckle at the lower end of the bottom flange. After the upper part and the lower part are fastened, a well sealer is arranged at the upper end of the bottom flange, and the bottom flange and the well sealer are fastened by bolts. When original cramping, because flange diameter is great at the bottom of the top layer sleeve pipe assorted well head, can't use B type tong to carry out the cramping, firstly use afterburning thick stick manual work to carry out the cramping, secondly use the pneumatic winch that the rig was equipped with as power, utilize the wire rope on the pneumatic winch, through the leading pulley, with wire rope winding carry out the cramping on flange at the bottom of the well head, reach the moment of torsion of regulation when these two kinds of methods can not make flange at the bottom of the well head buckle tightly, and wire rope drops when having the cramping and causes the risk that the object strikes, there is great potential safety hazard. Thirdly, a self-made double-piece fastening tool of a drilling team is used for putting the kelly bar into one part of the well, and the self-made double-piece fastening tool is fastened around the kelly bar. The method can enable the well head bottom flange to be fastened to reach the specified torque though the method can enable the well head bottom flange to be fastened to the specified torque through the bolt to be fixed on the well head bottom flange and driven by the kelly bar on the drill floor, but the method is very troublesome, needs to fix the tool through the bolt, and sometimes damages the bolt.

By search, the following is compared with the prior patent technology:

the 201711420554.7 patent discloses an apparatus and method for handling a wellhead bottom flange, comprising: the pipe connection, the upper shackle butt flange, the bottom flange, the sleeve and the ground are sequentially connected from top to bottom, and the upper shackle butt flange is located below the drilling platform surface. When the pipe connecting joint in the device is buckled, the pipe connecting joint is connected with a square drill rod or other pipe columns, the upper shackle butt flange and the bottom flange are connected through bolts, the upper shackle butt flange and the bottom flange are placed on the double-male side of the sleeve, the alignment buckle is aligned, the rotary pipe column is used, and the bottom flange is driven to be buckled on the double-male side of the sleeve until the requirements are met. Although the device and the method can enable the wellhead bottom flange to reach the specified torque, the tool can be fastened only by using bolts, the tool is very troublesome, the time-saving and labor-saving effects cannot be achieved, sometimes, the bolts are not fastened in a standard manner, certain shearing damage can be achieved on the bolts, the strength of the bolts is damaged, and potential safety hazards exist when the used bolts are used for fixing the blowout preventer. Therefore, a device which is time-saving, labor-saving, reasonable in structure, simple to manufacture and capable of realizing the fastening of the wellhead bottom flange without other fixing accessories needs to be developed.

Disclosure of Invention

The utility model aims at overcoming the technical problem and the potential safety hazard that exist are fastened tightly to the flange at the bottom of the well drilling top layer casing well head among the prior art, providing a flange and two pin joint fastening devices at the bottom of the oil drilling well head.

The utility model provides an oil drilling well head bottom flange and two pin thread joint locking device, includes: a middle shaft and an actuating mechanism; the method is characterized in that: the lower end of the middle shaft is in threaded connection with a central threaded hole of the driving disc, penetrates through a central hole of the shell and is connected with the actuating mechanism through a fixing nut, so that the middle shaft and the actuating mechanism are connected into a whole and are of an inverted T-shaped structure.

Furthermore, the center shaft is a cylinder provided with three-stage steps, the outer diameter of the center shaft is gradually decreased from top to bottom, the lower second stage is provided with an external thread matched with the driving disc, the bottom third stage is provided with an external thread matched with the fixing nut, and the upper portion is provided with an internal thread blind hole matched with the kelly bar.

Furthermore, the driving disc of the actuating mechanism is arranged in the shell and is in a four-petal plum-blossom shape, four arc-shaped inner tooth ways are uniformly distributed, gear rollers are arranged in the arc-shaped inner tooth ways, split shafts are arranged above and below the gear rollers and are in sliding connection with a lower slide way shaft at the bottom of the shell, the split shafts are in sliding connection with an upper slide way shaft of the upper cover ring, and the upper cover ring is fixedly connected with the upper part of the shell.

Furthermore, the radius of an inscribed circle of the arc-shaped inner tooth path is the same as the diameter of an circumscribed circle of the gear roller, teeth of the arc-shaped inner tooth path are meshed with teeth of the gear roller, and power is transmitted to the driving disc through the middle shaft, so that the gear roller performs arc motion in the arc-shaped inner tooth path.

Furthermore, the lower slideway and the upper slideway are arc-shaped, the width of the lower slideway and the width of the upper slideway are slightly larger than the diameter of the split shaft, and the central radius of the slideways is the same as the radius of the circumscribed circle of the gear roller

Further, the number of the gear rollers is four.

The utility model has the advantages that: the utility model discloses a be connected with the kelly bar, go into through-hole department in the well head end flange of treating the lock down with it, use winch power clockwise rotation carousel, the carousel makes the kelly bar clockwise rotation, driving-disc clockwise rotation on the kelly bar drive arrangement, with driving-disc complex gear roller removal walking, gear roller walk to an allocation after with well head end flange interior flange through-hole edge laminating atress, the rotation reaches well head end flange and the two public screw thread moments of torsion of regulation, lock down the completion. After fastening is completed, the rotary table is operated to rotate anticlockwise, the rotary table driving device rotates anticlockwise, the gear roller retreats, the square drill rod is lifted, and fastening of the wellhead bottom flange is completed. The problem of among the prior art well drilling scene well head bottom flange and two pin joint lock tightly detain can't fasten with B type tongs, there is the potential safety hazard with other manual methods lock, the utility model has the advantages of novel in design, convenient operation, safe in utilization.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic plan view of the actuator 2 in an initial state;

FIG. 3 is a schematic plan view of the actuator 2 in operation;

FIG. 4 is a schematic top view of roller 202;

FIG. 5 is a schematic front view of the roller 202;

fig. 6 is a schematic structural diagram of a top view of the driving disc 201;

fig. 7 is a schematic front view of the actuator 2 housing.

Description of the reference numerals: 1. a middle shaft; 2. an actuator; 201. a driving disk, 2011, an arc inner tooth track, 2012, a central threaded hole; 202. gear roller 2021, split shaft 2022, external teeth; 203. a housing; 204. an upper cover ring, 205, a fixed nut, 206, a lower slideway, 207, an upper slideway; 3. a wellhead bottom flange.

Detailed Description

The following will further explain the implementation of the present invention with reference to the drawings:

as shown in fig. 1-7, a fastening device for a bottom flange of an oil drilling well mouth and a double male buckle connector comprises: a middle shaft 1 and an actuating mechanism 2; the method is characterized in that: the lower end of the middle shaft 1 is in threaded connection with a central threaded hole 2012 of the driving disc 201, penetrates through a central hole of the shell 203, and is connected with the actuating mechanism 2 through a fixing nut 205, so that the middle shaft 1 and the actuating mechanism 2 are connected into a whole and are in an inverted T-shaped structure.

Specifically, the center shaft 1 is a cylinder provided with three steps, the outer diameter of the cylinder decreases gradually from top to bottom, the lower second stage is provided with an external thread matched with the driving disc 201, the bottom third stage is provided with an external thread matched with the fixing nut 205, and the upper portion is provided with an internal thread blind hole matched with the kelly bar.

Specifically, the driving disc 201 of the actuating mechanism 2 is arranged in the housing 203, the driving disc 201 is in a four-petal plum-blossom shape, four arc-shaped internal tooth channels 2011 are uniformly distributed, gear rollers 202 are arranged in the arc-shaped internal tooth channels 2011, split shafts 2021 are arranged above and below the gear rollers 202, the split shafts 2021 are in shaft sliding connection with the lower slide channel 206 at the bottom of the housing 203, the split shafts 2021 are in shaft sliding connection with the upper slide channel 207 of the upper cover ring 204, and the upper cover ring 204 is fixedly connected with the upper portion of the housing 203.

Specifically, the inscribed circle radius of the arc-shaped internal tooth path 2011 is the same as the circumscribed circle diameter of the gear roller 202, the teeth of the arc-shaped internal tooth path 2011 are meshed with the teeth of the gear roller 202, and power is transmitted to the driving disc 201 through the middle shaft 1 by utilizing the gear transmission principle, so that the gear roller 202 performs arc motion in the arc-shaped internal tooth path 2011.

Specifically, the lower slideway 206 and the upper slideway 207 are arc-shaped, the widths of the lower slideway 206 and the upper slideway 207 are slightly larger than the diameter of the split shaft 2021, and the central radius of the slideways is the same as the radius of the circumscribed circle of the gear roller 202

Specifically, the number of the gear rollers 202 is four.

The working principle is as follows:

the structural dimensions of an actuating mechanism 2 and a shell 203 of a fastening device of an oil drilling wellhead bottom flange and a double male buckle connector need to be matched with the specification and dimension of a double male buckle according to a wellhead bottom flange 3. The upper part of the middle shaft 1 is connected with a kelly bar, the actuating mechanism 2 is lowered into the position of a through hole in the wellhead bottom flange 3, the kelly bar is rotated by the power of a turntable on a drill floor, the kelly bar drives a driving disc 201 to drive a gear roller 202 to walk, the gear roller 202 is driven to walk to a certain position to be in fit stress with the through hole surface in the wellhead bottom flange 3 by utilizing the principle of gear transmission, the actuating mechanism 2 drives the wellhead bottom flange 3 and a double male joint to rotate and be fastened, and the gear roller 202 of the actuating mechanism 2 is driven to rotate reversely by the turntable to withdraw after the specified torque is reached. After fastening is completed, the rotary table is operated to rotate anticlockwise, the rotary table drives the actuating mechanism 2 to rotate anticlockwise, the gear roller 202 retreats, the kelly bar is lifted, and fastening of the wellhead bottom flange 3 is completed.

The above embodiments are only single illustrations of the present invention, and do not constitute limitations to the protection scope of the present invention, and all designs the same as or similar to the present invention belong to the protection scope of the present invention.

Claims (6)

1. The utility model provides an oil drilling well head bottom flange and two pin thread joint locking device, includes: a middle shaft (1) and an actuating mechanism (2); the method is characterized in that: the lower end of the middle shaft (1) is in threaded connection with a central threaded hole (2012) of the driving disc (201), penetrates through a central hole of the shell (203), and is connected with the actuating mechanism (2) through a fixing nut (205), so that the middle shaft (1) and the actuating mechanism (2) are connected into a whole and are of a T-shaped structure.

2. The oil drilling wellhead bottom flange and double male snap joint fastening device according to claim 1, characterized in that: the middle shaft (1) is a cylinder provided with three steps, the outer diameter of the middle shaft is gradually reduced from top to bottom, the lower second stage is provided with an external thread matched with the driving disc (201), the bottom third stage is provided with an external thread matched with the fixing nut (205), and the upper part of the middle shaft is provided with an internal thread blind hole matched with the kelly bar.

3. The oil drilling wellhead bottom flange and double male snap joint fastening device according to claim 1, characterized in that: the actuating mechanism (2) is characterized in that a driving disc (201) is arranged in a shell (203), the driving disc (201) is in a four-petal plum-blossom shape, four arc-shaped inner tooth tracks (2011) are uniformly distributed, gear rollers (202) are arranged in the arc-shaped inner tooth tracks (2011), split shafts (2021) are arranged above and below the gear rollers (202), the split shafts (2021) are in shaft sliding connection with lower slide ways (206) at the bottom of the shell (203), the split shafts (2021) are in shaft sliding connection with upper slide ways (207) of an upper cover ring (204), and the upper cover ring (204) is fixedly connected with the upper portion of the shell (203).

4. The oil drilling wellhead bottom flange and double male snap joint fastening device of claim 3, which is characterized in that: the radius of an inscribed circle of the arc-shaped inner tooth path (2011) is the same as the diameter of an circumscribed circle of the gear roller (202), the teeth of the arc-shaped inner tooth path (2011) are meshed with the teeth of the gear roller (202), and power is transmitted to the driving disc (201) through the middle shaft (1), so that the gear roller (202) does arc motion in the arc-shaped inner tooth path (2011).

5. The oil drilling wellhead bottom flange and double male snap joint fastening device of claim 3, which is characterized in that: the lower slideway (206) and the upper slideway (207) are arc-shaped, the width of the lower slideway (206) and the width of the upper slideway (207) are slightly larger than the diameter of the split shaft (2021), and the central radius of the slideways is the same as the radius of the circumscribed circle of the gear roller (202).

6. The oil drilling wellhead bottom flange and double male snap joint fastening device of claim 3, which is characterized in that: the number of the gear rollers (202) is four.

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