CN210530767U

CN210530767U - Coiled tubing is right and clamping device in pit

Info

Publication number: CN210530767U
Application number: CN201921730346.1U
Authority: CN
Inventors: 韩国栋; 张锦洲
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-05-15
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to a coiled tubing is right in pit and clamping device belongs to oil drilling equipment technical field. The clamping device comprises an upper chuck, a lower chuck, a support rod, a support ring, a hydraulic cylinder, a spring and a fixing plate, wherein the upper chuck and the lower chuck are symmetrically arranged in an up-down manner; the support ring is provided with a plurality of hydraulic cylinders, the periphery of the upper chuck and the periphery of the lower chuck are provided with a plurality of fixing plates, the upper chuck and the lower chuck are respectively connected with the fixing plates through supporting rods, and the hydraulic cylinders are connected with the supporting rods through piston rods. The device has simple structure, safety and reliability, quick response and can effectively solve the problems of deviation of the directional drilling track and unbalanced supporting force in the process of oil drilling of the continuous oil pipe. The method has positive significance for underground centering of the coiled tubing and normal operation of coiled tubing operation equipment.

Description

Coiled tubing is right and clamping device in pit

Technical Field

The utility model relates to a coiled tubing is right in pit and clamping device belongs to oil drilling equipment technical field.

Background

Compared with the conventional underground operation technology, the coiled tubing technology has the advantages of high operation efficiency, economy, practicability, wide application range, convenience in use and the like, but the coiled tubing has the characteristics of relatively small size, large flexibility, no rotation, difficulty in pressurization and the like, so that the centralization of the coiled tubing in the directional drilling process is poor, and the drilling track is difficult to control. In the process of entering the well, under the combined action of the injection force and the well bottom friction force, the coiled tubing is easy to bend, even the coiled tubing deviates from the expected drilling track, so that the application of the coiled tubing in directional drilling of a large-displacement well and a horizontal well is limited. The existing centralizing and clamping device is complex in structure and mostly consists of a plurality of groups of clamping blocks, the part for clamping the oil pipe is long, the situation that each clamping block is fully stressed by pressure from a hydraulic cylinder to obtain balanced clamping force cannot be guaranteed, and the uneven stress of each clamping block can cause that the coiled oil pipe cannot be aligned to a wellhead positioned in the blowout prevention box in the process of being clamped and lowered into the wellhead; especially when a certain clamping block is seriously abraded or mixed with hard foreign matters, the integral pressing block is abraded and deformed, or certain mutually-associated clamping hydraulic cylinders break down, the stress on the whole saddle-shaped clamping block of the injection head is unbalanced, so that the clamping force is obviously weakened, the well mouth in the blowout prevention box cannot be accurately aligned, and the continuous oil pipe operation equipment cannot normally operate. Therefore, there is a need to develop a new device for downhole centering and clamping of coiled tubing to solve the above problems.

Disclosure of Invention

An object of the utility model is to the not enough of above-mentioned prior art, provide a simple structure, the good reliability can effectively guarantee the uniformity of coiled tubing and well axiality, can prevent the skew anticipated orbit of well drilling of coiled tubing, and the well drilling precision is high, and difficult landing is right and clamping device in the well bottom pollution-free coiled tubing is in the pit.

The utility model discloses a realize above-mentioned purpose through following technical scheme:

the utility model provides a coiled tubing is right in pit and clamping device, it comprises last chuck, lower chuck, bracing piece, support ring, pneumatic cylinder, spring and fixed plate, its characterized in that: the upper chuck and the lower chuck are symmetrically arranged in an up-down shape, a spring is connected and installed between the upper chuck and the lower chuck, and a support ring is sleeved on the circumference of the middle part of the spring; the support ring is provided with a plurality of hydraulic cylinders, the periphery of the upper chuck and the periphery of the lower chuck are provided with a plurality of fixing plates, the upper chuck and the lower chuck are respectively connected with the fixing plates through supporting rods, and the hydraulic cylinders are connected with the supporting rods through piston rods.

The upper chuck and the lower chuck are both electric three-jaw hollow chucks, ear seats are fixedly arranged on the circumferences of the chucks at the jaws of the electric three-jaw hollow chucks, and supporting rods are movably arranged on the ear seats through pin shafts.

The fixed plate and the ear seat are arranged correspondingly, the fixed plate is composed of a panel and a supporting plate, the supporting plate is fixedly arranged on the back of the panel, and anti-skid bulges are uniformly distributed on the front of the panel.

The anti-skid bulge is conical.

The upper end of the supporting plate is provided with an upper sliding hole, and the lower end of the supporting plate is provided with a lower sliding hole;

the support rod on the upper chuck is in sliding connection with the lower slide hole through a connecting pin shaft; the support rod on the lower chuck is connected with the upper slide hole in a sliding way through a connecting pin shaft.

The bracing piece on going up the chuck and the bracing piece on the chuck down be the setting of fork form.

The support ring circumference on be 120 degrees equipartitions and have 3 mount pads, the pneumatic cylinder through round pin axle movable mounting on the mount pad, the pneumatic cylinder pass through piston rod and the bracing piece swing joint on the chuck down.

The diameter of the inner ring of the spring is larger than the outer diameter of the coiled tubing, and the upper end and the lower end of the spring are fixedly connected with the corresponding end faces of the upper chuck and the lower chuck respectively.

Compared with the prior art, the utility model beneficial effect lie in:

according to the coiled tubing centralizing and clamping device, the coiled tubing can be rapidly and synchronously clamped by simultaneously stretching the movable jaws of the chuck, the coiled tubing can be effectively controlled to be concentric with a borehole, and the drilling track of the coiled tubing is prevented from deviating from an expected track. Meanwhile, the device adopts a synchronous hydraulic cylinder to support the fixed plate, and friction is increased through the anti-skid protrusions uniformly distributed on the front surface of the fixed plate to realize supporting and fixing between the device and the well wall. The device has the advantages of simple structure, safety, reliability and quick response, and has positive significance for underground centralization of the coiled tubing and normal operation of coiled tubing operation equipment.

Drawings

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

fig. 2 is a schematic structural view of the connection between the fixing plate and the supporting rod of the present invention;

fig. 3 is a schematic structural view of the fixing plate of the present invention in an open state.

In the figure: 1. the device comprises an upper chuck, 2, a lower chuck, 3, a support rod, 4, a support ring, 5, a hydraulic cylinder, 6, a spring, 7, an ear seat, 8, a panel, 9, a support plate, 10, an anti-skid protrusion, 11, an upper slide hole, 12, a lower slide hole, 13, a clamping jaw, 14 and a continuous oil pipe.

Detailed Description

This coiled tubing is right in pit and clamping device is by last chuck 1, lower chuck 2, bracing piece 3, support ring 4, pneumatic cylinder 5, spring 6 and fixed plate constitute, it sets up with lower chuck 2 to go up chuck 1 and form symmetry about being, it is commercial electric three-jaw cavity chuck (produced by chenchen tai jingxin energy-saving technology limited company to go up chuck 1 and lower chuck 2, the model is jingxin, chuck diameter 200mm, chuck structure is no longer repeated), it has ear seat 7 to go up admittedly on the chuck circumference of 13 below of the jack catch 13 below of chuck 1 and the jack catch 13 top of lower chuck 2, there is bracing piece 3 through round pin axle movable mounting on the ear seat 7.

The spring 6 is connected and installed between the upper chuck 1 and the lower chuck 2, the diameter of the inner ring of the spring 6 is larger than the outer diameter of the coiled tubing 1 and the diameter of the central hole of the chuck, and the upper end and the lower end of the spring 6 are fixedly connected with the end faces corresponding to the upper chuck 1 and the lower chuck 2 respectively. The circumference of the middle part of the spring 6 is sleeved with a support ring 4; 3 mounting seats are uniformly distributed on the circumference of the support ring 4 at 120 degrees, and hydraulic cylinders 5 are movably mounted on the mounting seats through pin shafts; the circumference periphery of the upper chuck 1 and the lower chuck 2 is provided with 3 fixed plates which are arranged corresponding to the ear seats 7.

The fixing plate is composed of a panel 8 and a supporting plate 9, the supporting plate 9 is fixedly arranged on the back surface of the panel 8, and the panel 8 and the supporting plate 9 are arranged in a T shape to increase the overall strength; the front surface of the panel 8 is evenly provided with conical skidproof bulges 10. So as to increase the anti-skid performance of the fixing plate; when the anti-skid device works, the anti-skid protrusions 10 can enable the fixing plate to be firmly fixed on the well wall when the fixing plate is in contact with and supported by the well wall. The upper end of the supporting plate 9 is provided with an upper sliding hole 11, and the lower end of the supporting plate 9 is provided with a lower sliding hole 12; the support rod 3 on the upper chuck 1 is connected with a lower sliding hole 12 at the lower end of the support plate 9 in a sliding way through a connecting pin shaft; the support rod on the lower chuck 2 is connected with the upper sliding hole 11 at the upper end of the support plate 9 in a sliding way through a connecting pin shaft; the support rod 3 on the upper chuck 1 and the support rod 3 on the lower chuck 2 are arranged in a crossing way; the hydraulic cylinder 5 is movably connected with the support rod 3 on the lower chuck 2 through a piston rod. When the fixing device works, the end of the supporting rod 3 can slide in the sliding hole under the action of the hydraulic cylinder 5, so that the fixing plate is radially expanded.

When the clamping device works, the clamping jaws 13 of the upper chuck 1 and the lower chuck 2 respectively synchronously act under the action of the chuck motors so as to clamp the continuous oil pipe 14, and the hydraulic cylinders 5 on the support ring 4 synchronously extend and retract under the action of the hydraulic station so as to fix the clamping device at the wellhead; the method specifically comprises the following steps:

firstly, a coiled tubing 14 penetrates through a center hole of an upper chuck 1, penetrates out of a center hole of a lower chuck 2 through an inner ring of a spring 6 and then is put into a well, the device is sleeved on a well mouth, meanwhile, a chuck motor is communicated with a ground power supply, after a hydraulic cylinder 5 is communicated with a ground hydraulic station, the hydraulic cylinder 5 is started to synchronously act through the hydraulic station, a fixing plate is radially stretched, and the spring 6 is synchronously compressed, so that the clamping device is fixed at the well mouth, in the process, when the fixing plate is in contact with a well wall for supporting, an anti-skid protrusion 10 can firmly fix the fixing plate on the well wall, and the sliding of the fixing plate.

And then starting a chuck motor, driving the chuck jaws 13 to synchronously and radially contract so as to clamp the continuous oil pipe 14, and keeping the coaxiality of the continuous oil pipe 14 and the borehole consistent in the working state, so that the directional drilling operation can be carried out.

According to the coiled tubing centralizing and clamping device, the jaws of the chuck are simultaneously stretched, so that the coiled tubing 14 can be rapidly and synchronously clamped, the coiled tubing 14 can be effectively controlled to be concentric with a borehole, and the drilling track of the coiled tubing 14 is prevented from deviating from the expected track. Meanwhile, the device adopts the hydraulic cylinder 5 to support the fixed plate, and the friction force is increased by the anti-skid protrusions 10 uniformly distributed on the front surface of the fixed plate 5 to realize the supporting and fixing between the device and the well wall. The device has the advantages of simple structure, safety, reliability and quick response, and has positive significance for underground centralization of the coiled tubing 14 and normal operation of coiled tubing operation equipment.

Claims

1. The utility model provides a coiled tubing is right in pit and clamping device, it comprises last chuck (1), lower chuck (2), bracing piece (3), support ring (4), pneumatic cylinder (5), spring (6) and fixed plate, its characterized in that: the upper chuck (1) and the lower chuck (2) are symmetrically arranged in an up-down shape, a spring (6) is connected and installed between the upper chuck (1) and the lower chuck (2), and a support ring (4) is sleeved on the circumference of the middle part of the spring (6); a plurality of hydraulic cylinders (5) are mounted on the support ring (4), a plurality of fixing plates are arranged on the peripheries of the upper chuck (1) and the lower chuck (2), the upper chuck (1) and the lower chuck (2) are connected with the fixing plates through supporting rods (3), and the hydraulic cylinders (5) are connected with the supporting rods (3) through piston rods.

2. The coiled tubing downhole centralizer and gripper assembly of claim 1, wherein: go up chuck (1) and lower chuck (2) be electronic three-jaw cavity chuck, adorn ear seat (7) admittedly on the chuck circumference of each jack catch (13) department of electronic three-jaw cavity chuck, have bracing piece (3) through round pin axle movable mounting on ear seat (7).

3. The coiled tubing downhole centralizer and gripper assembly of claim 1, wherein: the fixing plate and the ear seat (7) are arranged correspondingly, the fixing plate is composed of a panel (8) and a supporting plate (9), the supporting plate (9) is fixedly arranged on the back surface of the panel (8), and anti-skid protrusions (10) are uniformly distributed on the front surface of the panel (8).

4. The coiled tubing downhole centralizer and gripper assembly of claim 3, wherein: the antiskid bulges (10) are in a conical shape.

5. The coiled tubing downhole centralizer and gripper assembly of claim 3, wherein: the upper end of the supporting plate (9) is provided with an upper sliding hole (11), and the lower end of the supporting plate (9) is provided with a lower sliding hole (12).

6. The coiled tubing downhole centralizer and gripper assembly of claim 1, wherein: the support rod (3) on the upper chuck (1) is connected with the lower sliding hole (12) in a sliding manner through a connecting pin shaft; the support rod (3) on the lower chuck (2) is connected with the upper sliding hole (11) in a sliding way through a connecting pin shaft.

7. The coiled tubing downhole centralizer and gripper assembly of claim 6, wherein: the support rod (3) on the upper chuck (1) and the support rod (3) on the lower chuck (2) are arranged in a crossing manner.

8. The coiled tubing downhole centralizer and gripper assembly of claim 1, wherein: support ring (4) circumference on be 120 degrees equipartitions and have 3 mount pads, pneumatic cylinder (5) through round pin axle movable mounting on the mount pad, pneumatic cylinder (5) through piston rod and bracing piece (3) swing joint on lower chuck (2).

9. The coiled tubing downhole centralizer and gripper assembly of claim 1, wherein: the diameter of the inner ring of the spring (6) is larger than the outer diameter of the coiled tubing (14), and the upper end and the lower end of the spring (6) are fixedly connected with the corresponding end surfaces of the upper chuck (1) and the lower chuck (2) respectively.