Oil pipe elevator device

Abstract

The invention discloses an oil pipe elevator device which comprises an upper oil pipe elevator, a lower oil pipe elevator and a supporting assembly. The upper oil pipe elevator is provided with a cylindrical first clamping position; the lower oil pipe elevator comprises a first buckling part and a second buckling part which are buckled with each other, and a cylindrical second clamping position is formed between the first buckling part and the second buckling part; the supporting assembly comprises a first arc-shaped supporting plate and a second arc-shaped supporting plate, the first arc-shaped supporting plate is fixedly connected to the extending end of the first buckling part, and the second arc-shaped supporting plate is fixedly connected to the extending end of the second buckling part; when the first buckling part and the second buckling part are buckled with each other, the first arc-shaped supporting plate and the second arc-shaped supporting plate are buckled with each other to form a cylinder; the outer diameter of the cylinder is smaller than or equal to the inner diameter of the first clamping position. By means of the oil pipe elevator device, construction can be simplified, and the labor intensity during workover treatment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil workover operations, and more specifically, to a tubing elevator device. Background Art

[0002] In the prior art, two tubing elevators are alternately used in oil workover operations to lift and lower the tubing string. For example, during the lifting operation, first, the wellhead Christmas tree is lifted by a crane to expose the connected tubing nipple and the first tubing coupling. Then, a tubing elevator is clamped under the first coupling to suspend the tubing string, and the elevator sits on the wellhead flange. Next, two slings of the traveling block are put on the lifting lugs on both sides of the tubing elevator, and safety pins are inserted on both sides subsequently to prevent the slings from falling off. The thread connection between the first tubing and the second coupling is disengaged. Then, the traveling block lifts the tubing string until the second coupling exposes above the casing flange plane by a height greater than that of a tubing elevator and stops. Another tubing elevator is lifted to the wellhead flange and clamped onto the second tubing coupling to lock it. At this time, the lifted tubing is lowered and placed on the wellsite pipe rack. The safety pins are pulled out, the two lifting lugs are removed, and the tubing elevator is removed and placed on the ground or a small platform table. Then, the two slings are put on the lifting lugs on both sides of the tubing elevator at the wellhead, and safety pins are inserted on both sides. The traveling block is used to lift the tubing string until the third coupling exposes above the casing flange plane by a height greater than that of a tubing elevator and stops. The tubing elevator placed on the ground or the small platform table is lifted to the wellhead flange plane and clamped onto the third tubing coupling to lock it. The above process is repeated to complete the lifting process.

[0003] In the existing operation process, the two tubing elevators need to alternately cooperate with the traveling block. Each time the tubing elevator is replaced, the operations of pulling out and inserting the safety pins need to be repeated. This not only makes the operation steps cumbersome, but also has certain safety hazards due to the repeated use of the traveling block to lift the tubing elevator, and increases the labor intensity of workers.

[0004] Therefore, a tubing elevator device that can simplify the construction process is needed to reduce the labor intensity during workover operations. Summary of the Invention

[0005] An object of the present invention is to provide a new technical solution for a tubing elevator device that can simplify the construction process.

[0006] The present invention provides a tubing elevator device, comprising: an upper tubing elevator, a lower tubing elevator and a support assembly; the upper tubing elevator has a cylindrical first clamping position; the lower tubing elevator includes a first fastening portion and a second fastening portion that are fastened to each other, and a cylindrical second clamping position is formed between the first fastening portion and the second fastening portion; the support assembly includes a first arc-shaped support plate and a second arc-shaped support plate, the first arc-shaped support plate is fixedly connected to the extended end of the first fastening portion, and the second arc-shaped support plate is fixedly connected to the extended end of the second fastening portion; when the first fastening portion and the second fastening portion are fastened to each other, the first arc-shaped support plate and the second arc-shaped support plate are fastened to form a cylinder; the outer diameter of the cylinder is less than or equal to the inner diameter of the first clamping position.

[0007] Optionally, the lower tubing elevator includes a split-type tubing elevator, and / or, the upper tubing elevator includes a side-opening tubing elevator;

[0008] On the axial projection of the second clamping position, both the first arc-shaped support plate and the second arc-shaped support plate are semi-circular.

[0009] Optionally, the upper tubing elevator includes a chamfered portion surrounding the first clamping position; the cylinder can be inserted into the first clamping position along the axial direction of the first clamping position, and along the insertion direction of the cylinder, the inner diameter of the chamfered portion gradually decreases to the inner diameter of the first clamping position.

[0010] Optionally, the upper tubing elevator includes a centering assembly, the centering assembly is located in the middle of the extension of the upper tubing elevator, and the centering assembly can expand and contract radially along the first clamping position to the first clamping position.

[0011] Optionally, an installation hole is provided in the middle of the extension of the upper tubing elevator, and the extension direction of the installation hole is the radial direction of the first clamping position; the centering assembly includes an elastic member and a top support member, and along the radial direction of the first clamping position and along the direction towards the axis of the first clamping position, the top support member and the elastic member are sequentially arranged in the installation hole.

[0012] Optionally, the installation hole is a through hole, one end of the through hole far from the first clamping position includes an internal thread section, and one end of the through hole close to the first clamping position includes a limiting portion; the centering assembly further includes an adjusting screw, the adjusting screw is arranged in the internal thread section, the elastic member is elastically arranged between the top support member and the adjusting screw, and the limiting portion blocks the top support member in the direction towards the first clamping position.

[0013] Optionally, at least three centering assemblies are provided, and at least three centering assemblies are sequentially and evenly arranged along the circumferential direction of the first clamping position.

[0014] Optionally, the lower tubing elevator includes an installation position surrounding the second clamping position; one end of each of the first arc-shaped support plate and the second arc-shaped support plate is provided with an installation seat, and the installation seat is detachably installed on the installation position.

[0015] Optionally, the installation position includes an annular groove, and the depression direction of the annular groove is the axial direction of the second clamping position; the mounting seat is embedded in the annular groove.

[0016] Optionally, the extended ends of the first arc-shaped support plate and the second arc-shaped support plate are flush.

[0017] The embodiments disclosed by the present invention have the following beneficial effects:

[0018] The tubing elevator device of the present invention is composed of an upper tubing elevator and a lower tubing elevator. The lower tubing elevator is provided with a support assembly, the height of the support assembly is greater than the height in the axial direction of the first clamping position, and the support assembly opens and closes with the two halves of the lower tubing elevator. During the tubing lifting operation, after lifting the coupling of the first tubing with coupling above the wellhead casing flange plane and the height of the lower tubing elevator, use the lower special-shaped elevator with a support assembly to wrap and suspend the tubing string. The weight of the tubing string acts on the support assembly through the first coupling. At this time, clamp the coupling at the top of the first tubing with the upper tubing elevator, and release the lower tubing elevator; the second tubing is connected to the first tubing through another coupling below. At this time, lift the first tubing, and the second tubing and another coupling are lifted accordingly. When the coupling at the top of the second tubing is lifted above the top of the support assembly, close the lower tubing elevator, remove the first tubing and lower the second tubing. The support assembly suspends another coupling and the second tubing at the wellhead. Repeating the above process can complete the lifting of the entire tubing. The process of tubing lowering is opposite to the above process and will not be elaborated here. As described above, it can be seen that during the entire tubing lifting process, the lower tubing elevator always hovers at the wellhead working position, and the traveling block hook is always connected in cooperation with the upper tubing elevator. During the operation, there is no need to repeatedly disassemble and install safety pins. Just repeatedly use the upper tubing elevator to lift the tubing to be lifted. Therefore, the operation steps are simplified, the labor intensity of workers is reduced, and the safety factor is improved.

[0019] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0020] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0021] Figure 1 It is a structural diagram of a tubing elevator device provided according to an embodiment;

[0022] Figure 2 It is a partial cross-sectional view of the upper tubing elevator of a tubing elevator device provided according to an embodiment;

[0023] Figure 3 It is Figure 1 The enlarged view at A in

[0024] Figure 4 For Figure 1 the enlarged view at position B in

[0025] The markings in the figure are as follows:

[0026] 1. Support assembly; 11. First arc-shaped support plate; 111. Mounting seat; 12. Second arc-shaped support plate; 2. Upper tubing elevator; 21. Chamfered part; 3. Hexagon socket head cap screw; 4. Lower tubing elevator; 41. Mounting position; 5. Steel ball; 6. Spring; 7. Adjusting plug. Detailed implementation manners

[0027] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present invention or its application or use.

[0029] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0030] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0031] As Figures 1 to 3 shown, this embodiment provides a tubing elevator device, including an upper tubing elevator 2, a lower tubing elevator 4, and a support assembly 1. Among them, the upper tubing elevator 2 is a side-opening tubing elevator, which has a cylindrical first clamping position; the lower tubing elevator 4 is a split-type tubing elevator, which includes a first clamping part and a second clamping part that are buckled with each other, and a cylindrical second clamping position is formed between the first clamping part and the second clamping part; the support assembly 1 includes a first arc-shaped support plate 11 and a second arc-shaped support plate 12, the first arc-shaped support plate 11 is fixedly connected to the top of the first clamping part, and the second arc-shaped support plate 12 is fixedly connected to the top of the second clamping part; when the first clamping part and the second clamping part are buckled with each other, the first arc-shaped support plate 11 and the second arc-shaped support plate 12 are buckled into a cylinder; the outer diameter r1 of the cylinder is less than or equal to the inner diameter r2 of the first clamping position.

[0032] Combined with Figure 1 and Figure 2, Further, in the axial projection of the second clamping position, both the first fastening portion and the second fastening portion are semi-circular; at the same time, in the axial projection of the second clamping position, the first arc-shaped support plate 11 and the second arc-shaped support plate 12 are also both semi-circular, and the two semi-circular arc-shaped support plates are butted to form a cylinder. The heights of the first arc-shaped support plate 11 and the second arc-shaped support plate 12 are greater than the height of the first clamping position.

[0033] Further, the upper tubing elevator 2 includes a chamfer portion 21 surrounding the first clamping position; the chamfer portion 21 is provided to facilitate the insertion of the cylinder into the first clamping position along the axis of the first clamping position. Specifically, along the insertion direction of the cylinder, the inner diameter of the chamfer portion 21 gradually decreases to the inner diameter r2 of the first clamping position.

[0034] Combined with Figure 2 , Further, the upper tubing elevator 2 includes a centering assembly. The centering assembly is located in the middle of the extension of the upper tubing elevator 2 and can expand and contract radially along the first clamping position. Of course, at least three centering assemblies are provided, and at least three centering assemblies are evenly arranged in sequence along the circumference of the first clamping position. Specifically, the centering assembly is set to the following structure. There is an installation hole in the middle of the extension of the upper tubing elevator 2. The installation hole is a through hole, and the extension direction of the installation hole is the radial direction of the first clamping position; the centering assembly includes a spring 6, a steel ball 5 and an adjusting plug 7. Along the radial direction of the first clamping position and along the direction towards the axis of the first clamping position, the adjusting plug 7, the spring 6 and the steel ball 5 are sequentially arranged in the installation hole, and the spring 6 is elastically arranged between the adjusting plug 7 and the steel ball 5; one end of the installation hole away from the first clamping position includes an internal thread section, and the adjusting plug 7 is screwed into the installation hole from the outside of the upper tubing elevator 2, and the adjusting plug 7 is in threaded connection with the internal thread section. One end of the installation hole close to the first clamping position includes a necking, and the inner diameter of the necking is smaller than the outer diameter of the steel ball 5. Adjusting the screwing depth of the adjusting plug 7 in the internal thread section can change the compression degree of the spring 6, and further change the clamping force of the spring on the steel ball 5. The steel ball 5 is the top support part of the present invention. The adjusting plug 7 is the adjusting screw of the present invention. The necking is the limiting part of the present invention.

[0035] Combined with Figure 4 , Further, in order to ensure the connection stability between the support assembly 1 and the lower tubing elevator 4, one end of the first arc-shaped support plate 11 and the second arc-shaped support plate 12 are respectively provided with mounting seats 111; the lower tubing elevator 4 includes a mounting position 41. The mounting position 41 surrounds the second clamping position. The mounting position 41 includes an annular groove, and the concave direction of the annular groove is the axial direction of the second clamping position; the mounting seat 111 is embedded in the annular groove, and the mounting seat 111 is detachably mounted on the mounting position 41 through an inner hexagon bolt 3.

[0036] Further, the extending ends of the first arc-shaped support plate 11 and the second arc-shaped support plate 12 are flush.

[0037] Next, a detailed introduction to the usage method of the present invention will be given:

[0038] 1. Process of lifting the tubing:

[0039] After lifting the coupling of the first tubing with coupling above the height of the wellhead casing flange plane and the lower tubing elevator, the split-type lower tubing elevator 4 with the support assembly 1 is used to wrap and suspend the tubing string. The weight of the tubing string acts on the first arc-shaped support plate 11 and the second arc-shaped support plate 12 through the first coupling, and then the lower tubing elevator 4 seats on the wellhead casing flange plane. At this time, the side-opening upper tubing elevator 2 is always suspended on the traveling block by two slings, and then the upper tubing elevator 2 is inserted into the upper plane of the coupling and the lower tubing elevator 4, and then the upper tubing elevator 2 is locked. Then, the traveling block hoisting system lifts the second tubing with coupling above the height of the wellhead casing flange plane and the lower tubing elevator 4 through the upper tubing elevator 2. At the same time, the lower tubing elevator 4 is opened. After the second tubing coupling passes over the lower tubing elevator 4, the lower tubing elevator 4 with the first arc-shaped support plate 11 and the second arc-shaped support plate 12 is closed to wrap and suspend the tubing string. The weight of the tubing string acts on the lower tubing elevator 4 with the first arc-shaped support plate 11 and the second arc-shaped support plate 12 through the second coupling, and then the lower tubing elevator 4 seats on the wellhead casing flange plane. Then, the traveling block is lowered to unload the upper tubing elevator 2, the first tubing is uncoupled from the second coupling, and then the first tubing is dragged into the wellsite pipe rack. The upper tubing elevator 2 is released, and the upper tubing elevator 2 is moved to the wellhead by the traveling block and inserted into the upper plane of the second coupling and the lower tubing elevator 4, and the upper tubing elevator 2 is locked again to complete the hoisting of the tubing string. Repeat the above process until the hoisting of the entire tubing is completed.

[0040] 2. Process of lowering the tubing:

[0041] First, the upper tubing elevator 2 has been hanging on the traveling block all the time. The first tubing string with a tubing coupling stands upright on the wellsite pipe rack. Then, the upper tubing elevator 2 is inserted into the coupling position of the first tubing string. The upper tubing elevator 2 is locked. The traveling block lifts the first tubing string with the upper tubing elevator 2 and then inserts it into the wellbore. At this time, the lower tubing elevator 4 is opened and closed to wrap the first tubing string. As the traveling block descends, the upper tubing elevator 2 descends successively. At this time, the first arc-shaped support plate 11 and the second arc-shaped support plate 12 of the lower tubing elevator 4 are inserted into the upper tubing elevator 2. A chamfered portion 21 with a large chamfer is machined at the lower central inlet of the upper tubing elevator 2 to facilitate the insertion of the first arc-shaped support plate 11 and the second arc-shaped support plate 12 of the lower tubing elevator 4. At the same time, an elastic centering assembly is arranged in the middle of the upper tubing elevator 2. The steel balls of the centering assembly press against the outer walls of the first arc-shaped support plate 11 and the second arc-shaped support plate 12 to center the upper tubing elevator 2 in the centering position, so as to introduce the first arc-shaped support plate 11 and the second arc-shaped support plate 12 on the lower tubing elevator 4 into the upper tubing elevator 2. The upper tubing elevator 2 continues to descend and unload, loading the load of the first tubing string onto the first arc-shaped support plate 11 and the second arc-shaped support plate 12 of the lower tubing elevator 4. Then, the upper tubing elevator 2 is removed. The upper tubing elevator 2 is inserted into the coupling position of the second tubing string lying on the wellsite pipe rack. The upper tubing elevator 2 is locked. The traveling block lifts the second tubing string with the upper tubing elevator 2. After setting it upright, the traveling block slowly lowers it. When the second tubing string is buckled into the female thread of the first tubing coupling, the upper tubing elevator 2 is lowered a little to unload, and then the tubing string is screwed together. Three or four centering assemblies for centering are arranged radially in the middle of the body of the upper tubing elevator 2 to center the tubing string in the center position. At this time, the traveling block lifts to completely bear the weight of the tubing string. Then, the lower tubing elevator 4 is opened. When the tubing coupling descends and passes over the lower tubing elevator 4, the lower tubing elevator 4 is closed and locked again. The traveling block with the upper tubing elevator 2 continues to lower. When the first arc-shaped support plate 11 and the second arc-shaped support plate 12 of the lower tubing elevator 4 are introduced into the upper tubing elevator 2, the load of the tubing string is completely loaded onto the first arc-shaped support plate 11 and the second arc-shaped support plate 12 of the lower tubing elevator 4. Then, the upper tubing elevator 2 is removed. Repeat the above process until the entire tubing string is lowered into the wellbore.

[0042] In summary, the lower tubing elevator of the present invention is provided with a support assembly, the height of the support assembly is greater than the height of the first clamping position in the axial direction, and the support assembly opens and closes with the two halves of the lower tubing elevator. During the tubing lifting operation, after lifting the coupling of the first tubing with coupling above the wellhead casing flange plane and the height of the lower tubing elevator, the lower special-shaped elevator with a support assembly is used to wrap and suspend the tubing string. The weight of the tubing string acts on the support assembly through the first coupling. At this time, the upper tubing elevator is used to clamp the coupling at the top of the first tubing, and the lower tubing elevator is loosened; the second tubing is connected to the first tubing through another coupling below. At this time, the first tubing is lifted, and the second tubing and another coupling are lifted accordingly. When the coupling at the top of the second tubing is lifted above the top of the support assembly, the lower tubing elevator is closed, the first tubing is removed, and the second tubing is lowered. The support assembly suspends another coupling and the second tubing at the wellhead. Repeating the above process can complete the lifting of the entire tubing. The process of tubing lowering is opposite to the above process and will not be elaborated here. As can be seen from the above, during the entire tubing lifting process, the lower tubing elevator always hovers at the wellhead working position, and the traveling block always maintains a mating connection with the upper tubing elevator. During the operation, there is no need to repeatedly disassemble and install safety pins. Only the upper tubing elevator needs to be reused to lift the tubing to be lifted. Therefore, the operation steps are simplified, the labor intensity of workers is reduced, and the safety factor is improved.

[0043] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tubing elevator device, characterized in that, Comprising: an upper tubing elevator, a lower tubing elevator and a support assembly; the upper tubing elevator has a cylindrical first clamping position; the lower tubing elevator includes a first fastening portion and a second fastening portion that are fastened to each other, and a cylindrical second clamping position is formed between the first fastening portion and the second fastening portion; the support assembly includes a first arc-shaped support plate and a second arc-shaped support plate, the first arc-shaped support plate is fixedly connected to the extended end of the first fastening portion, and the second arc-shaped support plate is fixedly connected to the extended end of the second fastening portion; when the first fastening portion and the second fastening portion are fastened to each other, the first arc-shaped support plate and the second arc-shaped support plate are fastened to form a cylinder; the outer diameter of the cylinder is less than or equal to the inner diameter of the first clamping position, and the height of the cylinder is greater than the axial height of the first clamping position.

2. The tubing elevator device according to claim 1, wherein: the lower tubing elevator includes a split tubing elevator, and / or, the upper tubing elevator includes a side-opening tubing elevator; in the axial projection of the second clamping position, both the first arc-shaped support plate and the second arc-shaped support plate are semi-circular.

3. The tubing elevator device according to claim 1 or 2, wherein: the upper tubing elevator includes a chamfered portion surrounding the first clamping position; the cylinder can be inserted into the first clamping position along the axis of the first clamping position, and along the insertion direction of the cylinder, the inner diameter of the chamfered portion gradually decreases to the inner diameter of the first clamping position.

4. The tubing elevator device according to claim 1 or 2, characterized in that, the upper tubing elevator includes a centering assembly, the centering assembly is located in the middle of the extension of the upper tubing elevator, and the centering assembly can expand and contract along the radial direction of the first clamping position to the first clamping position.

5. The tubing elevator device according to claim 4, wherein an installation hole is provided in the middle of the extension of the upper tubing elevator, and the extension direction of the installation hole is the radial direction of the first clamping position; the centering assembly includes an elastic member and a top support member, and along the radial direction of the first clamping position and along the direction towards the axis of the first clamping position, the top support member and the elastic member are sequentially arranged in the installation hole.

6. The tubing elevator device according to claim 5, wherein, the installation hole is a through hole, the end of the through hole far from the first clamping position includes an internal thread section, and the end of the through hole close to the first clamping position includes a limiting portion; the centering assembly further includes an adjusting screw, the adjusting screw is arranged in the internal thread section, the elastic member is elastically arranged between the top support member and the adjusting screw, and the limiting portion blocks the top support member in the direction towards the first clamping position.

7. The tubing elevator device according to claim 4, characterized in that, at least three centering assemblies are provided, and at least three centering assemblies are sequentially and evenly arranged along the circumference of the first clamping position.

8. The tubing elevator device according to claim 1 or 2, characterized in that, the lower tubing elevator includes an installation position, the installation position surrounds the second clamping position; one end of the first arc-shaped support plate and the second arc-shaped support plate are respectively provided with an installation seat, and the installation seat is detachably installed on the installation position.

9. The tubing elevator device according to claim 8, wherein, the installation position includes an annular groove, and the depression direction of the annular groove is the axial direction of the second clamping position; the installation seat is embedded in the annular groove.

10. The tubing elevator device according to any one of claims 1 or 2, characterized in that the extended ends of the first arc-shaped support plate and the second arc-shaped support plate are flush.

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