Wellhead safety device suitable for continuous rod

Abstract

The utility model discloses a well mouth safety device suitable for a continuous rod, which relates to the technical field of oil field well mouth operation tools and comprises a box body, and an upper opening and a lower opening which are matched with the continuous rod are respectively arranged on a top plate and a bottom plate of the box body. The device further comprises a fixed slip bowl, a movable slip bowl, an air cylinder and a jacking assembly, the fixed slip bowl is vertically fixed to one side of an inner cavity of the box body, an inclined bearing guide rail is arranged on the inner wall of the box body, and the movable slip bowl is installed on the bearing guide rail in a sliding mode and gradually gets close to the continuous rod when sliding downwards. Slips are detachably mounted on the surfaces, opposite to the fixed slip seats, of the slip seats; the top face of the movable slip bowl is perpendicular to the bearing guide rail, and a limiting ring and a sliding rod parallel to the bearing guide rail are arranged on the top face of the movable slip bowl. The sliding rod penetrates through the top plate of the box body in a sliding manner and is sleeved with a pressure spring; the continuous rod locking device is simple in structure, due to the fact that the air cylinder is adopted for starting the braking action, the device is fast in response, the continuous rod can be locked in the first time, and operation safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield wellhead operation tool technical field, concretely relates to a wellhead safety device suitable for continuous rod. BACKGROUND

[0002] Oilfield wellhead operation includes sucker rod, oil pipe, drill rod and so on pipe rod lifting or lowering operation, needs special tool to clamp solid in the operation process. The present using clamping tool is mainly calipers, the structure of calipers is mainly two symmetrical buckles are closed through the hinge of one side, and is clamped at the coupling at the end of pipe rod, so as to clamp pipe rod and make it relatively fixed, is not dropped into the well. But in reality, due to the wear of calipers and coupling, plus the calipers need to bear the huge weight of the lower pipe rod, the calipers often fail, leading to the pipe rod lifted or lowered to fall off, which affects the efficiency and safety of wellhead operation. And now there is a lack of a wellhead safety device suitable for continuous rod operation.

[0003] Chinese patent CN219910678U discloses a wellhead safety clamp for continuous rod operation, relating to oilfield wellhead operation tool technical field, including main body, the main body is hollow shell, the center of its top plate and bottom plate is symmetrically provided with upper mouth and lower mouth matched with continuous rod;It also includes fixed slips seat, movable slips seat and hydraulic cylinder, the fixed slips seat is vertically fixedly installed in the one side of main body inner chamber, the movable slips seat is horizontally slidably installed in the main body inner chamber, and it is parallel and opposite to the fixed slips seat, and the opposite surfaces of the two are detachably provided with slips;Correspondingly, the inner wall of the main body is provided with a horizontal load-bearing guide rail for the sliding of the movable slips seat, and the hydraulic cylinder is horizontally fixedly installed on the outer side of the main body, and the piston rod of the hydraulic cylinder is inserted into the main body inner chamber and fixedly connected with the back of the movable slips seat;When the continuous rod operation is abnormal or the equipment is out of control, the hydraulic cylinder cannot act quickly, so the reaction of the device is slow, and the continuous rod cannot be locked in the first time, which also affects the operation safety. UTILITY MODEL CONTENTS

[0004] The utility model aims at the defects existing in the prior art, and provides a wellhead safety device suitable for continuous rod.

[0005] The technical scheme of the utility model is: a wellhead safety device suitable for continuous rod, including box, the top plate and bottom plate of box are respectively provided with upper mouth and lower mouth matched with continuous rod;It also includes fixed slips seat, movable slips seat, air cylinder and jacking assembly, the fixed slips seat is vertically fixed in the one side of box inner chamber, the inner wall of the box is provided with inclined load-bearing guide rail, the movable slips seat is slidably installed on the load-bearing guide rail, and when it slides downward, it will gradually approach the continuous rod, and the opposite surfaces of the fixed slips seat are detachably provided with slips;

[0006] The top surface of the movable slip bowl is vertically arranged with the load bearing guide rail, and the top surface is provided with a limiting ring and a sliding rod arranged in parallel with the load bearing guide rail; the sliding rod is slidably penetrated through the top plate of the box body, and a compression spring is sleeved on the sliding rod; the two ends of the compression spring are respectively supported on the top surface of the movable slip bowl and the inner wall of the top plate of the box body, and the cylinder is fixedly installed on the back plate of the box body, and the cylinder rod penetrates through the box body and is matched with the limiting ring; when the cylinder rod is inserted into the limiting ring, the compression spring is in a compressed state.

[0007] The jacking assembly is installed on the bottom plate of the box body, and the output end thereof corresponds to the bottom surface of the movable slip bowl and is used for upwardly jacking the movable slip bowl.

[0008] Preferably, the top plate of the box body at the penetration position of the sliding rod is vertically arranged with the sliding rod.

[0009] Preferably, the bottom surface of the movable slip bowl is a horizontal surface, the jacking assembly comprises a horizontal push plate and a driver, the driver is fixedly installed on the bottom plate of the box body, and the push plate is fixed on the output end of the driver and is provided with a vertical guide rod slidably penetrated through the bottom plate of the box body.

[0010] Preferably, the driver is a worm screw lifter, the upper end of the screw rod is fixedly connected with the push plate, and a motor is connected with the worm.

[0011] Preferably, the driver is a hydraulic cylinder.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The device has the advantages of simple structure, high practicability, fast response, continuous rod locking in the first time, and work safety guarantee. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is an internal structure schematic view of the utility model;

[0015] Fig. 2 It is a back side perspective view of the utility model.

[0016] In the drawing: 1, box body, 2, fixed slip bowl, 3, movable slip bowl, 4, load bearing guide rail, 5, slip, 6, limiting ring, 7, cylinder, 8, sliding rod, 9, compression spring, 10, push plate, 11, guide rod, 12, worm screw lifter, 13, motor, 14, continuous rod, 15, lower joint. DETAILED DESCRIPTION

[0017] The utility model is further illustrated below in combination with the drawings and embodiments. Embodiment one

[0018] Referring to Figs. 1-2 As shown in the figure, a wellhead safety device suitable for a continuous rod 14 comprises a box body 1, an upper opening and a lower opening adapted to the continuous rod 14 are respectively formed in the top plate and the bottom plate of the box body 1; further comprising a fixed slip seat 2, a movable slip seat 3, a gas cylinder 7 and a jacking assembly, the fixed slip seat 2 is vertically fixed on one side of the inner cavity of the box body 1, an inclined load-bearing guide rail 4 is arranged on the inner wall of the box body 1, the movable slip seat 3 is slidingly installed on the load-bearing guide rail 4, and when it slides downward, it will gradually approach the continuous rod 14, and the opposite surfaces of the fixed slip seat 2 and the movable slip seat 3 are detachably installed with slips 5.

[0019] The top surface of the movable slip seat 3 is vertically arranged with the load-bearing guide rail 4, the top surface is provided with a limiting ring 6 and a sliding rod 8 arranged in parallel with the load-bearing guide rail 4; the sliding rod 8 slidingly penetrates the top plate of the box body 1, and a compression spring 9 is sleeved on the sliding rod 8; the two ends of the compression spring 9 are respectively supported on the top surface of the movable slip seat 3 and the inner wall of the top plate of the box body 1, specifically, the top plate of the box body 1 at the penetrating position of the sliding rod 8 is vertically arranged with the sliding rod 8. The gas cylinder 7 is fixedly installed on the back plate of the box body 1, the cylinder rod thereof penetrates the box body 1 and is adapted to the limiting ring 6; when the cylinder rod is inserted into the limiting ring 6, the compression spring 9 is in a compressed state.

[0020] The jacking assembly is installed on the bottom plate of the box body 1, the output end thereof corresponds to the bottom surface of the movable slip seat 3, and is used for jacking the movable slip seat 3 upward.

[0021] More specifically, the bottom surface of the movable slip seat 3 is a horizontal surface, the jacking assembly comprises a horizontal push plate 10 and a driver, the driver is fixedly installed on the bottom plate of the box body 1, the push plate 10 is fixed on the output end of the driver, and the bottom portion of the push plate 10 is provided with a guide rod 11 vertically slidingly penetrating the bottom plate of the box body 1.

[0022] In addition, the lower opening of the bottom plate of the box body 1 is provided with a lower connector 15 used for connecting with a blowout preventer.

[0023] In use, the device is installed above the wellhead blowout preventer, and the two are connected through flanges; the cylinder rod of the initial gas cylinder 7 is extended and inserted into the limiting ring 6; when the continuous rod 14 is abnormally operated or the equipment is out of control, the cylinder rod of the gas cylinder 7 is rapidly retracted, the movable slip seat 3 is released and quickly moves downward along the load-bearing guide rail 4 under the pushing of the compression spring 9 until the slips 5 on both sides tightly embrace the continuous rod 14; after the abnormal situation is handled, the driver is started, which drives the push plate 10 to jacking the movable slip seat 3 upward, and when the movable slip seat 3 is reset, the cylinder rod of the gas cylinder 7 is again extended and inserted into the limiting ring 6; finally, the jacking assembly is reset.

[0024] The device has simple structure and strong practicability, and the reaction of the device is fast due to the adoption of the cylinder 7 to start the braking action, so that the continuous rod 14 can be locked in the first time, and the operation safety is ensured; after the slips 5 of the movable slip seat 3 contact the continuous rod 14, the continuous rod 14 is lowered to drive the movable slip seat 3 to continue to move downward until the slips 5 on both sides lock the continuous rod 14. Example two

[0025] As a preferred embodiment of the utility model, the embodiment selects the driver on the basis of the embodiment one, specifically:

[0026] The driver of the embodiment is a worm screw elevator 12, the upper end of the screw rod of which is fixedly connected with the push plate 10, and the worm of which is connected with a motor 13; the motor 13 is fixedly installed on the back plate of the box body 1, and the output shaft thereof is connected with the worm of the worm screw elevator 12 through a shaft coupling.

[0027] After the abnormal condition is handled, the motor 13 is started to drive the worm to rotate, the screw rod is driven to move upward through the transmission of the worm and the worm gear, and the push plate 10 is driven to move upward. Example three

[0028] The difference between the embodiment and the embodiment two is that the driver of the embodiment is a hydraulic cylinder.

[0029] The utility model is not limited to the above-mentioned implementation, and various changes can be made within the knowledge range of the person skilled in the art without departing from the purpose of the utility model, and the changed content still belongs to the protection range of the utility model.

Claims

1. A wellhead safety device suitable for continuous rod, comprising a box, an upper opening and a lower opening are respectively arranged on the top plate and the bottom plate of the box, and the upper opening and the lower opening are respectively matched with the continuous rod; characterized in that: Also include fixed slips seat, movable slips seat, cylinder and jacking assembly, the fixed slips seat is fixed vertically in the inner cavity of the box, the inner wall of the box is provided with inclined bearing guide rail, the movable slips seat is slidingly installed on the bearing guide rail, and the movable slips seat gradually approaches the continuous rod when sliding downward, and the opposite surfaces of the fixed slips seat and the movable slips seat are detachably provided with slips; The top surface of the movable slips seat is perpendicular to the bearing guide rail, and the top surface is provided with a limiting ring and a sliding rod parallel to the bearing guide rail; the sliding rod slidingly penetrates the top plate of the box, and a compression spring is sleeved on the sliding rod; the two ends of the compression spring are supported on the top surface of the movable slips seat and the inner wall of the top plate of the box, respectively, the cylinder is fixedly installed on the back plate of the box, and the cylinder rod penetrates the box and is matched with the limiting ring; when the cylinder rod is inserted into the limiting ring, the compression spring is in a compressed state; The jacking assembly is installed on the bottom plate of the box, and the output end thereof corresponds to the bottom surface of the movable slips seat, and is used for upwardly jacking the movable slips seat.

2. A wellhead safety device suitable for use with continuous rods as claimed in claim 1, characterised in that: The top plate of the box at the sliding rod penetrating position is perpendicular to the sliding rod.

3. A wellhead safety device suitable for use with continuous rods as claimed in claim 1, characterised in that: The bottom surface of the movable slips seat is a horizontal surface, the jacking assembly comprises a horizontal push plate and a driver, the driver is fixedly installed on the bottom plate of the box, the push plate is fixed on the output end of the driver, and the bottom portion of the push plate is provided with a guide rod vertically slidingly penetrating the bottom plate of the box.

4. A wellhead safety device suitable for use with continuous rods as claimed in claim 3, characterised in that: The driver is a worm gear screw lifter, the upper end of the screw rod of the worm gear screw lifter is fixedly connected with the push plate, and a motor is connected with the worm gear of the worm gear screw lifter; the motor is fixedly installed on the back plate of the box, and the output shaft of the motor penetrates the box and is connected with the worm gear of the worm gear screw lifter through a shaft coupling.

5. A wellhead safety device suitable for use with continuous rods as claimed in claim 3, characterised in that: The driver is a hydraulic cylinder.

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