CN211073413U

CN211073413U - Wellhead bolt and screw jarring dismounting device

Info

Publication number: CN211073413U
Application number: CN201921819421.1U
Authority: CN
Inventors: 由平楷; 任鹏; 韦敏; 施明华; 王向东; 朱骏蒙
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Offshore Oil Extraction Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Offshore Oil Extraction Plant
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-24
Anticipated expiration: 2029-10-28

Abstract

The utility model relates to a wellhead bolt screw jarring dismounting device used in the petroleum industry, which comprises a jar and a bracket, wherein the jar is fixed in the bracket; an upper shock block and a lower shock block are arranged in the shock barrel, a compression spring and a shock guide rod are arranged between the upper shock block and a shock barrel end cover, and the upper shock block can slide up and down along the shock guide rod; a lower shock block is arranged below the shock guide rod, and the lower part of the lower shock block can extend out of the bottom of the shock cylinder; the motor is fixed on the upper part of the jar, and the motor output shaft of the motor is connected with the upper jar block through a traction rope. The utility model discloses can improve removing efficiency of well head bolt by a wide margin, reduce workman's intensity of labour, have fine result of use and using value.

Description

Wellhead bolt and screw jarring dismounting device

Technical Field

The utility model relates to a device, especially well head bolt screw rod jarring dismounting device demolish of oil industry well head bolt.

Background

Due to the high requirements on well control management of offshore oil fields, with the year-by-year advance of offshore oil field development, the workload of replacing the whole-well Christmas tree is increased suddenly in order to ensure production safety. The Christmas tree used on the offshore oil platform has severe working environment, high humidity and high salinity, and bolts in the wellhead Christmas tree are seriously corroded after years of use. After the nut is removed, the screw is difficult to remove from the bolt hole. At present, the traditional manual knocking method is adopted for dismantling the well bolt and the screw, and the screw is knocked out of the bolt hole by a high-lift hammer head or a hammer. The labor intensity is high, the working efficiency is low, and meanwhile, the labor accidents are easy to occur.

At present, there are several screw removal tool removal tools:

a screw removal tool, CN201621239661, is provided, which can only be disassembled in a limited space for nuts of different sizes, and can not take out a screw rod from a workpiece.

The device for automatically disassembling the screw of the extruder and the use method thereof and the CN201810900830 have the advantages of large volume and incapability of being installed and used on site.

A tool for disassembling a hinge hole bolt of a bogie and CN201710846041, the device is used for the hinge hole bolt and cannot eject a wellhead bolt.

A dismounting tool of bolt, CN201120534254, this device moment is little can't pull out rust well head bolt.

A screw rod dismounting tool, CN201821041610, is used for quickly dismounting a nut instead of ejecting a screw rod.

A screw rod dismantles tension device, CN201520918977, and this device moment is little can't pull out rust well head bolt;

screw rod dismounting device, CN201220395683, this device is bulky, and the field can't install and use.

The production field needs a tool which is convenient to use to improve the construction situation when the screw rod is dismantled.

Disclosure of Invention

The utility model aims at providing a well head bolt screw rod jarring dismounting device changes the construction mode that strikes at present by hand, improves work efficiency, reduces workman's intensity of labour.

To achieve the above purpose, the technical solution of the present invention is:

the wellhead bolt screw jarring dismounting device comprises a jar and a bracket, wherein the jar is fixed in the bracket; an upper shock block and a lower shock block are arranged in the shock barrel, a compression spring and a shock guide rod are arranged between the upper shock block and a shock barrel end cover, and the upper shock block can slide up and down along the shock guide rod; a lower shock block is arranged below the shock guide rod, and the lower part of the lower shock block can extend out of the bottom of the shock cylinder; the motor is fixed on the upper part of the jar, and the motor output shaft of the motor is connected with the upper jar block through a traction rope.

The motor is fixed on the upper part of the inner wall of the jar, one end of the traction rope is fixed in the radial hole of the motor output shaft, and the other end of the traction rope is fixed on the upper end face of the upper jar block.

The motor is fixed on the upper portion of the outer wall of the jar, an output shaft of the motor is arranged inside the jar, one end of the traction rope is fixed in a radial hole of the output shaft of the motor, and the other end of the traction rope is fixed on the upper end face of the upper jar block.

The motor is a direct-current explosion-proof motor, and a motor operating handle of the motor and a direct-current power supply are integrally installed together.

The longitudinal section of the lower shock block is of a dry-shaped structure, a shock limiting block is further arranged between the upper disc body and the lower disc body of the dry-shaped structure, the shock limiting block is fixed in the cylinder body of the shock cylinder and inserted between the upper disc body and the lower disc body of the lower shock block, and the lower rod body of the lower shock block extends out of the bottom of the shock cylinder.

The distance between the upper disc body and the lower disc body of the lower shock block conforms to the length of the wellhead bolt.

And a supporting spring is also arranged between the lower disc body of the lower shock block and the shock cylinder.

The upper shock block is a disc-shaped body and is provided with a central hole, and the aperture of the central hole is larger than the outer diameter of the shock guide rod.

The support is a U-shaped frame and can be transversely clamped outside a plate body of the wellhead flange, the U-shaped edge of the lower portion of the U-shaped frame is longer than the U-shaped edge of the upper portion of the U-shaped frame, the end portion of the U-shaped edge of the lower portion of the U-shaped frame is provided with a fixing bolt hole, and a fixing bolt is installed in the fixing bolt hole.

The end part of the U-shaped edge at the upper part of the bracket is fixed with a jar, and the distance from the inner side of the vertical rod of the U-shaped frame to the central line of the lower jar block is consistent with the external diameter of the well head flange.

Compare with current construction method and device, the utility model discloses a show the result of use and lie in:

this device adopts the motor to pass through the haulage rope and drives the back that goes upward of jar piece, strikes down jar piece again, strikes the machinery of well head bolt screw rod through lower jar piece and strikes the mode of strikeing, can easily strike the screw rod of bolt loose, take off among the well head device. The dismounting efficiency of the wellhead bolt is greatly improved, and the labor intensity of workers is reduced. Has good use effect and application value.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following detailed description of the present invention, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the invention. It is only following do the preferred embodiment of the utility model, other applications the utility model discloses an equivalent change all should belong to the utility model discloses a protection scope.

Referring to fig. 1, the wellhead bolt screw jarring dismounting device comprises a jar 13 and a bracket 12, wherein the jar 13 is fixed in the bracket 12; an upper shock block 3 and a lower shock block 5 are arranged in the shock barrel 13, a compression spring 2 and a shock guide rod 4 are arranged between the upper shock block 3 and the shock barrel end cover 1, and the upper shock block 3 can slide up and down along the shock guide rod 4; a lower shock block 5 is arranged below the shock guide rod 4, and the lower part of the lower shock block 5 can extend out of the bottom of the shock cylinder 13; the motor 9 is fixed on the upper part of the jar 3, and the motor output shaft of the motor 9 is connected with the upper jar block 3 through the hauling cable 8.

On the basis of the first embodiment, the utility model discloses still have following embodiment:

example two

The motor 9 is fixed on the upper portion of the inner wall of the jar 13, one end of the traction rope 8 is fixed in a radial hole of an output shaft of the motor 9, the other end of the traction rope is fixed on the upper end face of the upper jar block 3, and when the output shaft of the motor 9 rotates, the traction rope 8 can be wound on the traction rope to drive the upper jar block 3 to move upwards.

EXAMPLE III

The motor 9 is fixed on the upper part of the outer wall of the jar 13, the output shaft of the motor 9 is arranged inside the jar 13, one end of the traction rope 8 is fixed in a radial hole of the output shaft of the motor 9, and the other end is fixed on the upper end face of the upper jar block 3. When the output shaft of the motor 9 rotates, the traction rope 8 can be wound on the output shaft to drive the upper shock block 3 to move upwards.

Example four

The motor 9 is a direct-current explosion-proof motor, and a motor operating handle 10 of the motor 9 and a direct-current power supply 11 are integrally installed together. The direct-current explosion-proof motor can ensure the operation safety of the offshore oil platform, and the motor operating handle 10 and the direct-current power supply 11 are integrally installed together, so that the offshore oil platform is small in appearance and convenient to operate.

EXAMPLE five

The longitudinal section of the lower shock block 5 is of a dry-shaped structure, a shock limiting block 6 is further arranged between the upper disc body and the lower disc body of the dry-shaped structure, the shock limiting block 6 is fixed in the cylinder body of the shock cylinder 13 and is inserted between the upper disc body and the lower disc body of the lower shock block 5, the lower part rod body of the lower shock block 5 extends out of the bottom of the shock cylinder 13 to hit a screw rod of a wellhead bolt, and the lower shock block 5 is also made of an explosion-proof material, such as phenolic plastic.

EXAMPLE six

The distance between the upper disc body and the lower disc body of the lower shock block 5 conforms to the length of the wellhead bolt.

EXAMPLE seven

Preferably, a supporting spring 14 is further installed between the lower disc of the lower jar block 5 and the jar 13. After the supporting spring 14 is installed, the lower impact block 5 is pressed down by the upper impact block 3 to strike a wellhead bolt in a wellhead flange, and then can be bounced by the supporting spring 14, so that the impact operation of the next wellhead bolt is facilitated. Under general conditions, the wellhead bolt can be shaken out of the bolt hole only by shocking once, when the wellhead bolt is moved to the next wellhead bolt, if the supporting spring 14 is not installed, the lower shocking block 5 can be held by hand and placed at the top of the wellhead bolt, the supporting spring 14 is convenient to operate, and the lower shocking block 5 does not need to be held by hand.

Example eight

The upper shock block 3 is a disc-shaped body and is provided with a central hole, the aperture of the central hole is larger than the outer diameter of the shock guide rod 4, and the upper shock block 3 can easily slide up and down along the shock guide rod 4 through the central hole.

Example nine

The support 12 is a U-shaped frame and can be transversely clamped outside a plate body of the wellhead flange, the U-shaped edge at the lower part of the U-shaped frame is longer than the U-shaped edge at the upper part, a fixing bolt hole is formed in the end part of the U-shaped edge at the lower part, a fixing bolt 7 is arranged in the fixing bolt hole, and the support 2 and the wellhead flange are fixed together through the fixing bolt 7.

Example ten

The end portion of the upper U-shaped edge of the support 12 is fixed with a shock cylinder 13, the distance from the inner side of the vertical rod of the U-shaped frame to the central line of the lower shock block 5 conforms to the outer diameter of the wellhead flange, when the support 12 is installed on one side of the plate body of the wellhead flange through the fixing bolts 7, the support 12 is rotated, the plate body of the wellhead flange can be clamped into the support 12, and the lower shock block 5 can strike the bolt screw in the wellhead flange on the installation side of the fixing bolts 7.

During the use, install support 12 on the well head flange through fixing bolt 7 earlier, rotate support 12, make well head flange card go into in support 12, let the pole setting top of support 12 tightly at the disk body outer fringe of well head flange opposite side, aim at the screw rod of the well head bolt that needs the jarring with lower jar piece 5, screw fixing bolt 7 again.

The specific operation process is as follows:

the motor operation handle 10 is operated, the motor 9, the motor operation handle 10 and the direct current power supply 11 form a current path, the traction rope 8 is wound on an output shaft of the motor 9, and the traction rope 8 pulls the upper shock block 3 to compress the compression spring 2;

when the compression spring 2 is compressed to the yield limit, the motor 9 cannot continue to do work, the current rises, the current reaches a preset protection value, the motor operating handle 10 is subjected to overcurrent protection, the output shaft of the motor 9 rotates reversely, the upper shock block 3 drives the compression spring 2 to extend to the original length, the upper shock block 3 impacts the lower shock block 5, the lower shock block 5 impacts a screw rod of a wellhead flange bolt, and single shock is completed;

after a bolt in the wellhead flange is removed, loosening the fixing bolt 7, adjusting the position of the bracket 12, aligning the lower impact block 5 to the position where the bolt needs to be removed, screwing the fixing bolt 7, and continuously removing the bolt in the next wellhead flange;

so relapse, demolish after shaking the screw rod jarring of all corrosion bolts in the well head flange.

After the bolts on one wellhead flange are completely removed, the fixing bolts 7 are loosened, the device is moved away from the wellhead flange, and the next dismantling construction of the wellhead flange bolts can be continued or the construction can be finished.

The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.

Claims

1. The wellhead bolt and screw jarring dismounting device is characterized by comprising a jar and a support, wherein the jar is fixed in the support; an upper shock block and a lower shock block are arranged in the shock barrel, a compression spring and a shock guide rod are arranged between the upper shock block and a shock barrel end cover, and the upper shock block can slide up and down along the shock guide rod; a lower shock block is arranged below the shock guide rod, and the lower part of the lower shock block can extend out of the bottom of the shock cylinder; the motor is fixed on the upper part of the jar, and the motor output shaft of the motor is connected with the upper jar block through a traction rope.

2. A wellhead bolt and screw jarring dismounting device as claimed in claim 1, wherein the motor is fixed on the upper portion of the inner wall of the jar, one end of the haulage rope is fixed in the radial hole of the motor output shaft, and the other end is fixed on the upper end face of the upper jar block.

3. A wellhead bolt and screw jarring dismounting device as claimed in claim 1, wherein the motor is fixed on the upper portion of the outer wall of the jar, the output shaft of the motor is arranged inside the jar, one end of the traction rope is fixed in the radial hole of the output shaft of the motor, and the other end is fixed on the upper end face of the upper jar block.

4. A wellhead bolt and screw jarring dismounting device as claimed in claim 1, 2 or 3, wherein the motor is a DC explosion-proof motor, and a motor operating handle of the motor is integrally mounted with a DC power supply.

5. A wellhead bolt and screw jarring dismounting device as claimed in claim 1, wherein the longitudinal section of the lower jar block is in a dry-line shape, a jar limiting block is further arranged between the upper disk body and the lower disk body of the dry-line shape, the jar limiting block is fixed in the cylinder body of the jar cylinder and inserted between the upper disk body and the lower disk body of the lower jar block, and the lower rod body of the lower jar block extends out of the bottom of the jar cylinder.

6. A wellhead bolt and screw jarring dismounting device as claimed in claim 1 or 5, wherein the distance between the upper and lower disks of the lower jar block corresponds to the length of the wellhead bolt.

7. A wellhead bolt and screw jarring dismounting device as claimed in claim 6, wherein a support spring is also mounted between the lower plate of the lower jar block and the jar.

8. A wellhead bolt and screw jar dismounting device as claimed in claim 1, wherein the upper jar block is a disk-shaped body provided with a central hole having a bore diameter larger than the outer diameter of the jar guide rod.

9. A wellhead bolt and screw jarring dismounting device as claimed in claim 1, wherein the bracket is a U-shaped frame capable of being laterally clamped outside the body of the wellhead flange, the lower U-shaped edge of the U-shaped frame is longer than the upper U-shaped edge, the end of the lower U-shaped edge is provided with a fixing bolt hole, and a fixing bolt is arranged in the fixing bolt hole.

10. A wellhead bolt and screw jarring dismounting device as claimed in claim 9, wherein the jarring barrel is fixed to the end of the upper U-shaped edge of the bracket, and the distance between the inner side of the upright of the U-shaped bracket and the central line of the lower jar block is in accordance with the external diameter of the wellhead flange.