CN114634105A

CN114634105A - Electric drilling and workover rig and installation method thereof

Info

Publication number: CN114634105A
Application number: CN202210559293.1A
Authority: CN
Inventors: 梁帅; 陈祖波; 陈文清; 胡艺宝; 令狐俊; 王愉江
Original assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Current assignee: Sichuan Honghua Petroleum Equipment Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-06-17
Anticipated expiration: 2042-05-23
Also published as: CN114634105B

Abstract

The invention discloses an electric drilling and workover rig and an installation method thereof, belonging to the technical field of drilling and workover rig devices; the device comprises a base which can be arranged at the Christmas tree and can be lifted, and a derrick arranged on the base; the derrick comprises a derrick base section and a plurality of derrick sections arranged on the derrick base section; the base comprises a base and a supporting seat, a supporting upright post, a telescopic cylinder and an inclined upright post for stabilizing the structure are arranged between the base and the supporting seat, and the supporting seat is jacked up through the telescopic cylinder; the invention effectively solves the problems that the base structure is higher in height, the danger coefficient of operation is high and the Christmas tree needs to be detached in the assembling process by utilizing the base modularization design and the design of the liftable structure, realizes the modularization of the structure by virtue of the liftable base structure design, simplifies the whole structure, and promotes the technical effect that the Christmas tree does not need to be detached and does not touch the Christmas tree in the whole structure assembling process.

Description

Electric drilling and workover rig and installation method thereof

Technical Field

The invention relates to an electric drilling and workover rig and an installation method thereof, belonging to the technical field of drilling and workover rig devices.

Background

Along with the development of petroleum and natural gas in hills and mountain areas such as Chongqing areas, a great deal of well repairing operation requirements of the oil and gas wells are brought. Because the cost of workover operation by adopting the drilling machine is higher, the tonnage of the mechanical workover rig for conventional oil and gas well operation is smaller, the transportation size is large, the occupied area of a well site is large, and the requirements of workover operation in hills and mountainous areas like Yu areas in Sichuan can not be completely met.

Receive hills and mountain area workover conditions limited, prior art has following shortcoming:

1) the transportation condition is poor, and the size and the weight of a single transportation module are limited;

2) the area of a workover site is small;

3) well control equipment is complex, and the height and width dimensions are large;

4) the cluster well workover operation space is small;

5) the square well has large size;

6) the well depth of the well repairing operation is continuously increased;

7) the traditional mechanical transmission equipment is low in energy transmission efficiency, high in labor intensity of workers and severe in operation environment, and cannot meet the requirement of low-carbon operation.

Disclosure of Invention

The invention aims to: aiming at the existing problems, the electric drilling and workover rig and the installation method thereof are provided, and the problems that the equipment installation and transportation conditions are limited, the area of a workover site is limited, well control equipment is complex, the cluster well workover space is small, the square well size is large, the workover depth is large, the workover efficiency is low and the like can be effectively solved.

The technical scheme adopted by the invention is as follows:

the utility model provides an electric drill, workover rig which characterized in that: the device comprises a liftable base which can be arranged at a Christmas tree and a derrick arranged on the base;

the base comprises a base and a supporting seat, a supporting upright post, a telescopic cylinder and an inclined upright post for stabilizing the structure are arranged between the base and the supporting seat, the supporting seat is jacked up by the telescopic cylinder and is not collided with the Christmas tree, and a main winch is further arranged on the base;

when the supporting seat is not jacked, the inclined upright post is not connected with the base; when the supporting seat is jacked up, the inclined upright post is assembled and connected with the base;

the derrick comprises a derrick base section and a plurality of derrick sections arranged on the derrick base section, wherein a crown block is arranged at the top of the derrick section, small winches are arranged on two sides of the derrick base section, a lifting device is further arranged in the middle of the derrick base section, and the derrick sections can be lifted and upwards assembled and formed through the lifting device.

Further, the base comprises a left base and a right base, and the left base and the right base are assembled and connected into a whole through a connecting frame;

the supporting seat comprises a left upper seat and a right upper seat, and the left upper seat and the right upper seat are assembled into a whole through a middle seat.

Further, the left base and the left upper seat, and the right base and the right upper seat are assembled through a support upright post, a telescopic cylinder and an inclined upright post respectively;

after the supporting seat is jacked, the supporting upright columns, the supporting seat and the base form a rectangular structure, the supporting upright columns arranged between the left base and the left upper seat and the supporting upright columns arranged between the right base and the right upper seat respectively form a structure with a large upper part and a small lower part, and therefore a containing cavity with a large lower part and a small upper part in the middle of the base is formed.

Further, left side base and upper left seat, right base and upper right seat are respectively through support post, telescoping cylinder and oblique stand assembly, support post includes preceding support post and back support post.

Further, any one section or multiple sections or all of the derrick sections adopt a foldable derrick structure, the foldable derrick structure comprises a first body and a second body, the first body and the second body are connected and assembled in a hinged mode, and the first body and the second body can be turned and folded through a hinged point;

when the first body and the second body are folded, a regular polygonal structure is formed, and the vertex of the folded structure is not higher than the vertex of the first body or the second body when the first body or the second body is flatly placed.

Furthermore, the foldable derrick structure comprises a plurality of transverse rod bodies which are transversely arranged, longitudinal rod bodies are fixedly arranged at two ends of each transverse rod body, and a supporting rod body for reinforcing is arranged between each transverse rod body and each longitudinal rod body;

the pin joint is arranged on the transverse rod body, the pin joint is eccentrically arranged to enable the transverse rod body to be divided into two asymmetric parts, and the pin joint is also arranged between the connecting points of the transverse rod body and the supporting rod body.

Further, after the first body and the second body are folded, a transverse rod body where the first body or the second body is located and a longitudinal rod body where the second body or the first body is located are used as opposite sides to form a rectangular structure;

the folded structure vertex is the vertex of the longitudinal rod body where the first body or the second body is located.

Further, the pin joint is provided with the round pin shaft hole including setting up the second otic placode on the first otic placode of first body and the second body respectively on first otic placode and the second otic placode to link to change the assembly through the round pin axle.

Further, the pin shaft holes of the first lug plate and the second lug plate are respectively provided with 2 groups and are arranged along the longitudinal direction;

when the folding type folding bicycle is required, the pin shaft positioned in the pin shaft hole on the outer side is dismounted, and the relative rotation of the first body and the second body is realized through the matching of the pin shaft hole positioned on the inner side and the pin shaft.

Further, the first ear plate or/and the second ear plate is/are of a single plate or/and U-shaped groove structure;

when the first ear plate or/and the second ear plate is/are a single plate, the plate body is arranged along the folding direction of relative rotation of the first body and the second body;

when the first ear plate or/and the second ear plate is/are U-shaped grooves, the upper side panel body and the lower side panel body of each U-shaped groove are arranged along the folding direction of relative rotation of the first body and the second body, and the back plate of each U-shaped groove is fixed on the first body or/and the second body.

Further, when the supporting seat is not lifted, the supporting seat and the base are fixedly assembled through pin shaft connection.

An electric drilling and workover rig installation method comprises the following steps:

a. installing the drilling and workover rig base at a low position, and connecting the upper left base with the left base and the upper right base with the right base at a low position by using a pin shaft;

b. assembling a derrick foundation section on the installed supporting seat, and assembling a hoisting device and a small winch on the derrick foundation section;

c. assembling a crown block to the top end of the three sections of the derrick, hoisting the crown block at the base section of the derrick, connecting the crown block with a hoisting device 8, and hoisting the crown block to a specified height;

d. horizontally hoisting the second derrick section, aligning a front leg pin shaft of the second derrick section with the hook of the third derrick section, slowly lowering the second derrick section to enable the second derrick section to be in a vertical state, connecting a rear leg pin shaft of the second derrick section, connecting the bottom of the rear leg pin shaft with a hoisting device, and hoisting the second derrick section to a specified height by adopting a small winch and the hoisting device;

e. horizontally hoisting a section of the derrick, aligning the front leg pin shaft with the hook of the second section of the derrick, slowly lowering the front leg pin shaft, enabling the section of the derrick to be in a vertical state, connecting the rear leg pin shaft of the section of the derrick behind the front leg pin shaft, and connecting the bottom of the rear leg pin shaft with a hoisting device; if the length of the drill rod needs a longer height, repeatedly increasing one section, and repeating the step e;

f. horizontally hoisting a racking platform, aligning a connecting pin shaft and placing the connecting pin shaft into a hook of a first section of a derrick, then connecting a racking rod of the racking platform with the first section of the derrick by using the pin shaft, and threading a safety pin at the hook of the racking platform;

g. hoisting the derrick to the right position by using a small winch and a hoisting device, and fixing a section of the derrick and a derrick base section firmly;

h. and disassembling a connecting component between the supporting seat and the base, lifting the supporting seat in place by using a hydraulic cylinder, and respectively connecting the lower end of the inclined stay bar with the left base and the right base by using a pin shaft.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the electric drilling and workover rig and the installation method thereof, in the structural design, the problems that the base is high in structural height and high in danger coefficient of operation and a Christmas tree needs to be detached in the assembly process are effectively solved by the base modularization design and the liftable structure design, the modularization of the structure is realized by virtue of the liftable base structural design, the whole structure is simpler, and the technical effect that the Christmas tree does not need to be detached and does not touch the Christmas tree in the whole structural assembly process is promoted;

2. according to the electric drilling and workover rig and the installation method thereof, the assembly of the derrick is realized by using a mode of lifting from bottom to top in the structural design of the assembly, the utilization rate of the middle space of the K-shaped frame structure is fully utilized in the specific structural design, and the technical effects that the whole structure is more compact, the occupied construction space is smaller and more construction space is not used for extra stations are effectively realized through the structural design;

3. according to the electric drilling and workover rig and the installation method thereof, the space utilization effect of the derrick after folding is effectively improved, the gravity center of the structure after folding is more stable, the occupied space is smaller in the transportation process, better stability is obtained, the problem of swinging or space utilization waste caused by the gravity center problem is avoided, and the electric drilling and workover rig and the installation method thereof have higher efficiency in the folding process compared with the traditional technology.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic elevation view of a derrick of the present invention;

FIG. 2 is a schematic side view of a derrick of the invention;

FIG. 3 is a schematic side view of the base of the present invention;

FIG. 4 is a schematic front view of the base of the present invention;

FIGS. 5-13 are schematic views of the assembly process of the drilling and workover rig of the present invention;

figure 14 is a schematic structural view of a mast section;

figure 15 is a schematic cross-sectional view of a mast section;

figure 16 is a structural schematic of the derrick section after folding;

FIGS. 17 and 18 are schematic structural illustrations of the hinge point closure and deployment points;

FIGS. 19 and 20 are schematic views of the construction of the support base;

FIG. 21 is a schematic view of the connection of the upper left seat and the left base;

fig. 22 is a schematic view of the connection point of the upper right seat and the left base.

The labels in the figure are: 1-winch, 2-derrick base section, 3-derrick section, 4-derrick two section, 5-derrick three section, 6-crown block, 7-racking table, 8-hoisting device, 9-upper left seat, 10-middle seat, 11-upper right seat, 12-eccentric support, 13-left base, 14-connecting frame, 15-right base, 16-front support column, 17-telescopic cylinder, 18-rear support column, 19-inclined column, 20-Christmas tree, 21-first body, 22-second body, 23-transverse rod body, 231-first transverse rod body, 232-second transverse rod body, 24-longitudinal rod body, 25-support rod body, 26-first lug plate, 27-second lug plate, 28-pin shaft hole, 29-main winch and 30-pin shaft.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Example 1

An electric drilling and workover rig, as shown in fig. 1 to 22, comprises a liftable base which can be arranged at a Christmas tree 20, and a derrick arranged on the base;

the base comprises a base and a supporting seat, a supporting upright post, a telescopic cylinder 17 and an inclined upright post 19 for stabilizing the structure are arranged between the base and the supporting seat, the supporting seat is jacked up through the telescopic cylinder 17 and does not collide with the Christmas tree 20, and a main winch 29 is further arranged on the base;

when the supporting seat is not jacked, the inclined upright column 19 is not connected with the base; when the supporting seat is jacked up, the inclined upright post 19 is assembled and connected with the base;

the derrick comprises a derrick base section 2 and a derrick section which is formed by arranging a plurality of sections on the derrick base section 2, wherein a crown block 6 is arranged at the top of the derrick section, small winches 1 are arranged on two sides of the derrick base section 2, a lifting device 8 is further arranged in the middle of the derrick base section 2, and the derrick section can be lifted and upwards assembled and formed through the lifting device 8.

In this design, it should be particularly noted that, on the basis of the design of the structure, the main purpose of using the liftable structure is to protect the christmas tree 20, the christmas tree 20 is usually fixed, and meanwhile, considering the size of the square well, a modular base structure design is adopted to more effectively protect the christmas tree 20 and give way to the square well. Based on the base in operating condition, its height is about 9m usually, and utilize over-and-under type structural design can effectual reduction installation degree of difficulty, improve the security. It is further noted that in the design of the structure, the height of the base when the derrick is assembled is about 3 m.

As a further illustration, in the design of the structure, the structural assembly of the derrick is realized by lifting from bottom to top, compared with the conventional structure, although there is also lifting means applied to the drilling machine, for example: 2016111697047 and is common in applications in marine drilling rigs. Meanwhile, a base with a certain modular design is also provided. In the present application, it is important to explain that, in the field of drilling machine, especially in the field of workover rig, the combination of the two technologies is not available at present, and the design of the structure is not only for the combination of functions, but also for the consideration of the site shortage of the construction site, the safety system when installing the derrick, and the protection of the existing christmas tree 20, etc., so as to realize the efficient operation and guarantee of high safety, and further reduce the requirement of the construction site environment.

On the basis of the design of the specific structure, the base comprises a left base 13 and a right base 15, and the left base 13 and the right base 15 are assembled and connected into a whole through a connecting frame 14;

the supporting seat comprises a left upper seat 9 and a right upper seat 11, wherein the left upper seat 9 and the right upper seat 11 are assembled into a whole through a middle seat 10.

In order to ensure the stability of the assembling relation and consider the assembling effect, the left base 13 and the left upper seat 9, and the right base 15 and the right upper seat 11 are respectively assembled through a supporting upright post, a telescopic cylinder 17 and an inclined upright post 19;

after the supporting seat is jacked, the supporting columns, the supporting seat and the base form a rectangular structure, the supporting columns arranged between the left base 13 and the left upper seat 9 and the supporting columns arranged between the right base 15 and the right upper seat 11 are respectively of a structure with a large upper part and a small lower part, and therefore a containing cavity with a large lower part and a small upper part in the middle of the base is formed.

In this design, seem conventional design, and the explanation of putting emphasis on, this base can effectually guarantee original support stability on the one hand, and is further, can provide more sufficient space for production tree 20 to the protection can not cause production tree 20's injury at the in-process of drilling, workover rig assembly dismantlement, has realized that need not dismantle production tree 20 when assembling drilling, workover rig, can not cause the damage to wellhead equipment.

In synchronization, in the present design, the design of the oblique upright column 19 is based on the consideration of a rectangular structure, the parallelogram structure is not stable in general, but the instability thereof promotes the lifting characteristic of the base, and the stability of the structure is realized and ensured by the design of the oblique upright column 19 because the stability of the whole base needs to be maintained during the use process.

Further, the left base 13 and the left upper seat 9, the right base 15 and the right upper seat 11 are respectively assembled through a support column, a telescopic cylinder 17 and an inclined column 19, and the support column comprises a front support column 16 and a rear support column 18.

For the convenience of transportation, when the supporting seat is not lifted, the supporting seat and the base are fixedly assembled through pin shaft connection.

In the above specific structural design, the lifting device includes a fixed pulley fixedly arranged on the derrick base section 2 and a movable pulley capable of being assembled on the derrick section, and under the action of the crown block 6 and the small winch 1, the lifting of the movable pulley can drive the lifting of the derrick section.

In the above specific structural design, the two sides of the supporting seat are also provided with the lateral room supports 12.

Example 2

As a more specific design, on the basis of the design of embodiment 1, as shown in fig. 14 to 18, any one or more or all of the derrick sections adopt a foldable derrick structure, the foldable derrick structure comprises a first body 21 and a second body 22, the first body 21 and the second body 22 are connected and assembled in a hinged manner, and the first body 21 and the second body 22 can be folded and overturned through a hinged point;

when the first body 21 and the second body 22 are folded, a regular polygonal structure is formed, and the vertex of the folded structure is not higher than the vertex of the first body 21 or the second body 22 when the first body 21 or the second body 22 is laid flat.

In this embodiment, a conventional folding technology is used as a comparative illustration, and the prior application 2015206532219 is taken as an example, the prior structure is also a foldable structure design, but through years of application and practical situations, after the structure is laid flat, compared with the original derrick structure, the height of the structure is relatively higher and higher than that of the derrick, although a certain space saving is achieved in the horizontal direction, the space cannot be effectively utilized in the height direction, the space of a closed loop of a frame body is larger, and a certain folding instruction is provided in the space utilization, but the structure is implemented in a specific structure design, and the effect of the structure is greatly different from that of the design. As specific design, the design not only effectively reduces the space occupation in the horizontal direction, but also fully utilizes the closed-loop space, so that the occupation in the height direction is far smaller than that of the traditional structural design, the height of the derrick is leveled after being horizontally placed, and the occupied height space is only the longitudinal rod body 24 on one side. Furthermore, based on the consideration of the center, the design does not need to turn over the horizontally-placed structure, and the disassembly and assembly efficiency is further improved.

In the above specific structural design, further, the foldable derrick structure includes a plurality of transverse rod bodies 23 arranged transversely, longitudinal rod bodies 24 are fixedly arranged at two ends of the transverse rod bodies 23, and a support rod body 25 for reinforcement is further arranged between the transverse rod bodies 23 and the longitudinal rod bodies 24; in this design, the derrick is typically a K-type structure, based on the usual manner of existing structures. Under the whole quality's of original condition circumstances, consider the efficiency problem of dismouting and transportation.

Based on the design basis of the above specific structure, the hinge point is disposed on the transverse rod body 23, and the hinge point is eccentrically disposed to divide the transverse rod body 23 into two asymmetric parts, namely a first transverse rod body 231 and a second transverse rod body 232, wherein the length of the first transverse rod body 231 is greater than the length of the second transverse rod body 232. The main purpose of adopting asymmetric structural design is to achieve the effect that the gravity center is more stable by adopting a regular polygon structure after the folding. In this design, only this is taken as an illustration, without excluding another embodiment, in which the length of the first transversal rod 231 is smaller than the length of the second transversal rod 232. Therefore, in this description, for clarity of description, neither the first body nor the second body is excluded as a folded and inverted portion.

On the basis of the above-mentioned design of the specific structure, the hinge point is also located between the connecting points of the transverse rod body 23 and the support rod body 25. The structure of this mode can effectually realize the folding effect of derrick.

In a further design, after the first body 21 and the second body 22 are folded, the transverse rod 23 of the first body 21 or the second body 22 and the longitudinal rod 24 of the second body 22 or the first body 21 are used as opposite sides to form a rectangular structure. Based on the design theory of the structure, as a specific description, the length of the longitudinal rod 24 is matched with the length of the first transverse rod 231, and the matching means that the two longitudinal rods 24 do not interfere with each other after being turned over.

In a more specific design, when the first body 21 and the second body 22 are folded, a vertex of the folded structure is a vertex of the longitudinal rod 24 where the first body 21 or the second body 22 is located.

In a further design, the hinge point includes a first ear plate 26 and a second ear plate 27 respectively disposed on the first body 21 and the second body 22, and a pin hole 28 is disposed on the first ear plate 26 and the second ear plate 27 and is rotatably assembled by a pin 30.

In a more specific design, the pin shaft holes 28 in the first lug plate 26 and the second lug plate 27 respectively have 2 groups and are arranged along the longitudinal direction;

when folding is needed, the pin shaft 30 in the pin shaft hole 28 at the outer side is detached, and the pin shaft hole 28 at the inner side is matched with the pin shaft 30 to realize the relative rotation of the first body 21 and the second body 22.

As a principle of rotation, the rotation point can not be interfered, and the design of the synchronous 2-group pin shaft holes 28 also needs to ensure that the rod bodies on two sides can not rotate relatively after being assembled.

Example 3

On the basis of embodiment 1, as shown in fig. 17 and 18, the ear plate is designed, and the first ear plate 26 and the second ear plate 27 are of a single plate structure;

when the first ear plate 26 and the second ear plate 27 are single plates, the plates are arranged along the folding direction of the relative rotation of the first body 21 and the second body 22.

In the design of the structure, the structure of the plate body is based on the figure, and the upper and lower side surfaces of the single plate structure are parallel to the upper and lower side surfaces of the transverse rod body 23.

Example 4

On the basis of the embodiment 2, as shown in fig. 17 and fig. 18, the design of the ear plate structure is different, and the first ear plate 26 and the second ear plate 27 are U-shaped groove structures;

when the first ear plate 26 and the second ear plate 27 are U-shaped grooves, the upper and lower side panel bodies of the U-shaped grooves are arranged along the folding direction of the relative rotation of the first body 21 and the second body 22, and the back panels thereof are fixed on the first body 21 or/and the second body 22.

Of course, as a more specific description, in the design of the above structure, in combination with embodiment 2 and embodiment 3, one of the first ear plate 26 and the second ear plate 27 may adopt a single plate structure, and the other structure adopts a U-shaped groove structure.

Example 5

On the basis of the embodiment 1, as a further design, the derrick section comprises a derrick section 3, a derrick section 4 and a derrick section 5 which are arranged from bottom to top in sequence.

According to the design of the specific structure, the mounting method of the electric drill and the workover rig is obtained, and comprises the following steps:

a. as shown in fig. 5, the drilling and workover rig base is installed at a low position, and the upper left base is connected with the left base, and the upper right base is connected with the right base at a low position by a pin shaft;

b. as shown in fig. 6, the derrick base section is assembled on the installed supporting seat, and a hoisting device and a small winch are assembled on the derrick base section;

c. as shown in fig. 7, the crown block is assembled on the top of the three sections of the derrick and hoisted at the base section of the derrick, and is connected with a hoisting device 8 and hoisted to a specified height;

d. as shown in fig. 8 and 9, the second derrick section is horizontally hoisted, the front leg pin shaft is aligned with and placed into the hook of the third derrick section, then the second derrick section is slowly lowered and is in a vertical state, the rear leg pin shaft of the rear derrick section is connected, the bottom of the rear leg pin shaft is connected with a hoisting device, and the second derrick section is hoisted to a specified height by using a small winch and a hoisting device;

e. as shown in fig. 10, the first section of the derrick is horizontally hoisted, the front leg pin shaft is aligned with and placed into the hook of the second section of the derrick, then the first section of the derrick is slowly lowered and is in a vertical state, the rear leg pin shaft of the first section of the derrick is connected, and the bottom of the rear leg pin shaft is connected with a hoisting device; if the length of the drill rod needs a longer height, repeatedly increasing one section, and repeating the step e;

f. as shown in fig. 11, the racking platform is horizontally hung, the connecting pin is aligned with and placed into the hook of the first section of the derrick, then the racking rod of the second layer is connected with the first section of the derrick by the pin, and the safety pin is threaded at the hook of the racking platform;

g. as shown in fig. 12, a small winch and a hoisting device are adopted to hoist the first derrick section to a position, and the first derrick section and the derrick base section are firmly fixed;

h. as shown in fig. 13, the connecting member between the support base and the base is detached, the support base is lifted to the right by the hydraulic cylinder, and the lower ends of the diagonal braces are respectively connected with the left base and the right base by the pin shafts.

In the specific design described above, where disassembly is to be achieved, the reverse operation is done in the order of step h-a.

The structure of combining above-mentioned embodiment and the design of mounting means, it has brought more beneficial effect for transporting:

the first derrick section, the second derrick section and the third derrick section are transported in a folding mode, so that the transportation module is shortened, and the assembly and disassembly time is shortened to achieve rapid transportation.

And (4) adopting the reverse steps of the installation method to lower and disassemble the derrick. And (4) lowering the first section of the derrick, detaching the second-layer platform, carrying out independent transportation, detaching the first section of the derrick, and carrying out folded loading transportation.

And sequentially lowering a derrick second section and a derrick third section, folding, loading and transporting, and transporting the derrick third section and the crown block together.

And (4) removing the derrick foundation section, and splitting the derrick foundation section into a left foundation section and a right foundation section which are independently loaded and transported.

The base can be transported in three modules. Dismantling the middle module; the base middle transport module mainly comprises a middle base and auxiliary equipment arranged in the middle base, and is used for independent loading and transport.

The base transportation module transports the upper left seat, the left base, the left front supporting upright post, the left telescopic cylinder, the left supporting upright post and the left inclined upright post as a module as a whole, and can be also separated into independent modules for independent transportation. The right upper seat, the right base, the right front supporting upright post, the right telescopic cylinder, the right rear supporting upright post and the right inclined upright post are transported as a module.

With the above specific structural design and operation, the following technical effects are achieved:

1) poor transport conditions, single transport modules are limited in size and weight: the derrick adopts a modular design and a folding structure, and all the transportation modules are controlled within a range allowed by road conditions;

2) the area of the workover site is small: the headframe is vertically lifted in a segmented manner, and the base is rotationally lifted in a parallelogram structure, so that the occupied space is reduced;

3) well control equipment is complex, and height and width dimensions are both large: the base is installed at a low position and then lifted to a high position through the hydraulic cylinder, so that the height of the drilling platform surface and the clearance height of the base are improved;

4) the cluster well workover operation space is small: the base adopts parallelogram structure's play to rise the mode, and the base upper strata before rising to rise is located the production tree front side, plays to rise the height that the in-process rotating height is greater than the production tree, can be complete avoid well head production tree.

5) The square well has large size; the upper seat and the base are staggered, and the middle-layer upright post is large at the top and small at the bottom, so that the square well is effectively avoided while the top-layer module is met.

6) The well depth of the well repairing operation is continuously increased; the large hook load reaches 315 tons, the well repairing operation of 8000 m of 89mm drill rods with the diameter can be realized, and the well drilling operation of 5000m of 114mm drill rods with the diameter can be realized.

7) Traditional mechanical transmission equipment energy transmission is inefficient, and workman intensity of labour is big, and the operation environment is abominable, can't satisfy the low carbon operation demand: the winch, the slurry pump and the rotary table are directly driven by the variable frequency motor, so that the transmission efficiency is improved and the maintenance operation of equipment is reduced compared with the traditional mechanical transmission and hydraulic transmission. Automatic machines can be installed, one-key operation is realized, and intelligent drilling is realized.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims

1. The utility model provides an electric drill, workover rig which characterized in that: the device comprises a liftable base which can be arranged at a Christmas tree and a derrick arranged on the base;

2. An electric drilling and workover rig as claimed in claim 1, wherein: the base comprises a left base and a right base which are assembled and connected into a whole through a connecting frame;

3. An electric drilling and workover rig as claimed in claim 2, wherein: the left base and the left upper seat as well as the right base and the right upper seat are assembled through a supporting upright post, a telescopic cylinder and an inclined upright post respectively;

4. An electric drilling and workover rig as claimed in claim 2, wherein: the left base and the upper left seat, and the right base and the upper right seat are assembled through a support column, a telescopic cylinder and an inclined column respectively, and the support column comprises a front support column and a rear support column.

5. An electric drilling and workover rig as claimed in claim 1, wherein: any one section or multiple sections or all derrick sections adopt a foldable derrick structure, the foldable derrick structure comprises a first body and a second body, the first body and the second body are connected and assembled in a hinged mode, and the first body and the second body can be turned and folded through a hinged point;

6. An electric drilling and workover rig as claimed in claim 5, wherein: the foldable derrick structure comprises a plurality of transverse rod bodies which are transversely arranged, longitudinal rod bodies are fixedly arranged at two ends of each transverse rod body, and a supporting rod body for reinforcement is arranged between each transverse rod body and each longitudinal rod body;

7. An electric drilling and workover rig as claimed in claim 6, wherein: after the first body and the second body are folded, a transverse rod body where the first body or the second body is located and a longitudinal rod body where the second body or the first body is located are used as opposite edges to form a rectangular structure;

8. An electric drilling and workover rig as claimed in claim 5, wherein: the pin joint comprises a first ear plate and a second ear plate, the first ear plate is arranged on the first body, the second ear plate is arranged on the second body, and the pin shaft holes are formed in the first ear plate and the second ear plate and are connected and assembled through pin shafts.

9. An electric drilling and workover rig as claimed in claim 8, wherein: the pin shaft holes in the first lug plate and the second lug plate are respectively provided with 2 groups and are arranged along the longitudinal direction;

10. An electric drilling and workover rig as claimed in claim 8, wherein: the first ear plate or/and the second ear plate is/are of a single plate or/and U-shaped groove structure;

11. An electric drilling and workover rig as claimed in claim 1, wherein: when the supporting seat is not lifted, the supporting seat and the base are fixedly assembled through pin shaft connection.

12. An electric drilling and workover rig installation method for installing an electric drilling and workover rig according to any one of claims 1 to 11, wherein the method comprises the following steps:

b. assembling a derrick foundation section on the installed supporting seat, and assembling a lifting device and a small winch on the derrick foundation section;

c. assembling a crown block to the top end of the three sections of the derrick, hoisting the crown block at the base section of the derrick, connecting the crown block with a hoisting device, and hoisting the crown block to a specified height;