Downhole sleeve rapid lifting device

Abstract

The utility model provides a rapid lifting device for a descending sleeve, and relates to the field of large-diameter water well drilling construction, the rapid lifting device comprises a lifting short section, the top of the lifting short section is connected with a drill rod, the lifting short section is clamped in a clamping groove in the sleeve to be descended through a lifting beam, and the clamping groove comprises an extending part and a clamping positioning part which are communicated with each other; a clamping included angle is formed between the extending direction of the clamping positioning part and the extending direction of the extending part, so that when the lifting beam is guided by the extending part to move downwards to the bottom of the lifting beam, the drill rod rotates to drive the lifting beam to enter the clamping positioning part, and then the sleeve to be put into the well is connected with the drill rod; quick connection and separation of the drill rod and the sleeve are realized by a method of screwing the lifting beam into and out of the clamping groove; the whole device is easy to machine, use and operate, and cost is saved.

Description

Technical Field

[0001] The present application relates to the field of large-diameter water well drilling construction, and in particular to a device for quickly lifting a casing downhole. Background Art

[0002] During water well construction, when lowering the secondary or tertiary sleeve, the sleeve head needs to be connected to the drill pipe, and the secondary or tertiary sleeve is lowered into the well into place by lifting it through the drill pipe.

[0003] The existing pipe lowering technology is to process a conversion joint on the drill pipe, with left-handed threads on both ends of the conversion joint, left-handed threads on the sleeve head, and left-handed threads on the bottom of the drill pipe. In this way, the sleeve and the drill pipe are connected through the left-handed thread conversion joint, and the sleeve is lowered into the predetermined position in the well. However, when lowering the well, the steps of connecting and separating the secondary or tertiary sleeve and the drill pipe in the well are cumbersome, and the construction efficiency is low. Utility Model Content

[0004] The purpose of the present application is to provide a device for quickly lifting the casing downhole in order to solve the problems in the above-mentioned prior art. When the casing is lowered, the casing head is quickly connected to the drill pipe to send the casing downhole. The processing is simple and the operation is quick. The casing downhole is easy to separate from the drill pipe, which saves costs.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] The present application provides a device for quickly lifting a casing for going down into the well, comprising: a lifting pup joint, the top of which is connected to a drill pipe, a lifting beam being horizontally arranged on the lifting pup joint; two clamping grooves being symmetrically arranged on the wall of the casing to be lowered into the well with the axis of the casing to be lowered into the well as the symmetry center, the clamping grooves comprising mutually connected extension parts and clamping positioning parts, the extension part extending downward from the top of the wall of the casing to be lowered into the well, the extension direction of the clamping positioning part and the extension direction of the extension part forming a clamping angle, so that when the lifting beam is guided downward to its bottom by the extension part, the lifting beam is driven into the clamping positioning part by the rotation of the drill pipe, thereby realizing the connection between the casing to be lowered into the well and the drill pipe.

[0007] Optionally, the slot is located on the inner side of the wall of the casing to be lowered into the well; or the slot is arranged to penetrate the wall of the casing to be lowered into the well.

[0008] Optionally, the extending direction of the extending portion is parallel to the axis of the casing to be lowered into the well.

[0009] Optionally, the extension portion extends obliquely downward along the wall of the casing to be lowered into the well.

[0010] Optionally, the extending direction of the clamping positioning portion is the circumferential direction of the casing to be lowered into the well at which the bottom of the extending portion is located.

[0011] Optionally, a limiting portion extending toward the top of the casing to be lowered into the well is provided at one end of the clamping positioning portion away from the extending portion.

[0012] Optionally, the extending direction of the clamping positioning portion is from the bottom of the extending portion to the top of the casing to be lowered into the well.

[0013] Optionally, the lifting beam and the lifting short section form a ┴-shaped structure or a ┼-shaped structure.

[0014] Optionally, a rib plate is provided between the lifting beam and the lifting short section, and two adjacent side walls of the rib plate are respectively connected to the outer wall of the lifting beam and the outer wall of the lifting short section.

[0015] Optionally, the top of the lifting short section is connected to the bottom of the drill pipe through a variable thread joint.

[0016] The beneficial effects of the present application include: a device for quickly lifting a casing to be lowered into the well provided by the present application includes a lifting pup joint, the top of the lifting pup joint is connected to the drill pipe, the lifting pup joint is clamped in a clamping groove on the casing to be lowered into the well through a lifting beam, the clamping groove includes an extension portion and a clamping positioning portion that are interconnected, the extension direction of the clamping positioning portion and the extension direction of the extension portion form a clamping angle, so that when the lifting beam is guided downward to its bottom by the extension portion, the lifting beam is driven into the clamping positioning portion by the rotation of the drill pipe, thereby realizing the connection between the casing to be lowered into the well and the drill pipe, and after the casing to be lowered into the well is in place, the lifting beam withdraws from the clamping groove, and the method of screwing the lifting beam into and out of the clamping groove realizes the rapid connection and separation of the drill pipe and the casing; the whole device is simple to process and operate, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of a quick-lifting device for a casing in a well provided in an embodiment of the present application Figure 1 ;

[0019] Figure 2 A schematic diagram of a quick-lifting device for a casing in a well provided in an embodiment of the present application Figure 2 ;

[0020] Figure 3 A schematic diagram of a quick-lifting device for a casing in a well provided in an embodiment of the present application Figure 3 .

[0021] Icons: 10 - casing to be lowered into the well; 110 - slot; 111 - extension portion; 112 - snap-on positioning portion; 20 - lifting short section; 210 - first connecting slot; 220 - connecting hole; 30 - lifting beam; 40 - drill pipe; 50 - rib plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0024] During water well construction, when lowering the secondary or tertiary sleeve, the sleeve head needs to be connected to the drill pipe, and the secondary or tertiary sleeve is lowered into the well into place by lifting the drill pipe. In the prior art, the sleeve and the drill pipe are connected by a threaded conversion joint. After the sleeve is lowered into the well to a predetermined position, it is difficult to separate the sleeve from the borehole, which affects the construction efficiency. The present application provides a quick lifting device for the sleeve to be lowered into the well, and the sleeve 10 to be lowered into the well can be quickly separated from the lifting short section 20. The processing and operation methods are quick and simple, and cost saving.

[0025] Reference Figure 1 The present application provides a device for quickly lifting a casing for a well, comprising: a lifting nipple 20, the top of which is connected to a drill pipe 40, a lifting beam 30 being horizontally arranged on the lifting nipple 20; two clamping grooves 110 being symmetrically arranged on the wall of the casing 10 to be lowered into the well with the axis of the casing 10 to be lowered into the well as the symmetry center, the clamping grooves 110 comprising mutually connected extension portions 111 and clamping positioning portions 112, the extension portions 111 extending downward from the top of the wall of the casing 10 to be lowered into the well, the extension direction of the clamping positioning portion 112 and the extension direction of the extension portion 111 forming a clamping angle, so that when the lifting beam 30 is guided downward to its bottom by the extension portion 111, the drilling pipe 40 rotates and drives the lifting beam 30 into the clamping positioning portion 112, thereby realizing the connection between the casing 10 to be lowered into the well and the drill pipe 40.

[0026] exist Figure 1In the embodiment, the two slots 110 are slot I and slot II, respectively, and slot I and slot II are symmetrically arranged relative to the axis of the casing 10 to be lowered into the well. The lifting beam 30 enters the casing 10 to be lowered into the well from the extension portion 111 of the slot 110 along the extension direction of the slot 110, and is rotated and lifted along the axis of the casing 10 to be lowered into the well at the bent position at the bottom of the slot 110, so that the lifting beam 30 is clamped into the clamping positioning portion 112 of the slot 110, and the drill rod 40 is connected to the lifting sub 20 to drive the casing 10 to be lowered into the well to be lifted, and the lifting sub 20 lifts the casing 10 to be lowered into a predetermined position in the well, and the lifting beam 30 rotates out of the slot 110, and the lifting sub 20 and the casing 10 to be lowered into the well are separated, and the drill rod 40 drives the lifting sub 20 to be lifted out of the well.

[0027] Specifically, the clamping groove 110 is located on the inner side of the wall of the casing 10 to be lowered into the well; or the clamping groove 110 is arranged to penetrate the wall of the casing 10 to be lowered into the well.

[0028] Furthermore, the extending direction of the extending portion 111 is parallel to the axis of the casing 10 to be lowered into the well.

[0029] Furthermore, the extension portion 111 extends obliquely downward along the wall of the casing 10 to be lowered into the well.

[0030] In one embodiment of the present application, the extending direction of the clamping positioning portion 112 is the circumferential direction of the casing 10 to be lowered into the well where the bottom of the extending portion 111 is located.

[0031] Specifically, the function of the clamping angle is to make the extension direction of the extension part 111 and the clamping positioning part 112 different, and after the lifting beam 30 receives the upward lifting force, the clamping positioning part 112 is used as the force-bearing part to lift the casing 10 to be lowered into the well. Therefore, when the extension direction of the extension part 111 is parallel to the axis of the casing 10 to be lowered into the well, the clamping positioning part 112 can extend horizontally along the circumference of the casing 10 to be lowered into the well, forming a clamping angle of a right angle; or the clamping positioning part 112 can be inclined upward along the casing 10 to be lowered into the well, forming a clamping angle of an acute angle. Similarly, when the extension part 111 extends obliquely downward along the wall of the casing 10 to be lowered into the well, the clamping positioning part 112 can also adopt the same method to form a clamping angle with the extension part 111. In addition, the clamping positioning part 112 can also be extended in a non-linear manner, but in an arc, to achieve the above-mentioned function.

[0032] Furthermore, the end of the clamping positioning portion 112 away from the extension portion 111 is provided with a limiting portion extending toward the top of the casing 10 to be lowered into the well. Figure 1 As shown, in the embodiment of the present application, the extending direction of the clamping positioning portion 112 is from the bottom of the extending portion 111 to the top of the casing 10 to be lowered into the well.

[0033] Specifically, a connecting hole 220 is formed at the bottom of the lifting short section 20, and the lifting beam 30 passes through the connecting hole 220 and is fixed to the hole wall of the connecting hole 220 by welding. The lifting beam 30 is round steel with good weldability. The lifting beam 30 is tempered to make its strength meet the requirements of safely lifting the casing 10 to be lowered into the well. The connection method is simple, low-cost, and easy to implement.

[0034] like Figure 2 As shown, the limiting structure of the embodiment of the present application is a rib plate 50, which connects the lifting beam 30 and the lifting short section 20 along the extension direction of the lifting beam 30. In the embodiment of the present application, the length of the lifting short section 20 is 500 mm, and the lifting beam 30 is connected to the bottom of the lifting short section 20. The rib plate 50 of the present application can not only prevent the lifting beam 30 from horizontal displacement and shaking during the lifting process, but also improve the connection strength between the lifting short section 20 and the lifting beam 30.

[0035] Specifically, the top of the lifting pup joint 20 is connected to the bottom of the drill rod 40 through a variable thread joint, the upper part of the lifting pup joint 20 is connected to the drill rod 40, a first connecting groove 210 is provided at the top of the lifting pup joint 20, and a connecting block is provided at the bottom of the drill rod 40, and the connecting block and the first connecting groove 210 are threadedly connected.

[0036] Furthermore, there are multiple drill rods 40, and the multiple drill rods 40 are connected by a variable thread joint. A second connecting groove is provided on the top of the drill rod 40, and the second connecting groove and the connecting block are threadedly connected so that two of the drill rods 40 are connected to each other. By connecting the multiple drill rods 40, the depth of the casing 10 to be lowered into the well can be extended.

[0037] Specifically, the width of the slot 110 is greater than the diameter of the lifting beam by more than 5 mm, so that the lifting beam 30 can be smoothly screwed into the slot 110 for fixation.

[0038] Specifically, the threaded parts in the first connection groove 210, the second connection groove and the connection block are all treated by quenching and tempering to meet the connection strength. The material of the lifting nipple 20 has good weldability, the threaded part is quenched and tempered to meet the thread strength of the drill pipe 40, and the strength of the lifting beam quenched and tempered to meet the safety of lifting the casing 10 to be lowered into the well.

[0039] The lifting short section 20 of the device for quickly lifting the casing downhole provided in the embodiment of the present application is 500 mm long and easy to install; the present application adopts a lifting beam screwed into the slot 110, and the lifting short section 20 is connected to the drill pipe 40 to send the casing to be lowered into the well to the specified position in the well, and after the drill pipe 40 is loosened and rotated, the lifting beam exits the sleeve slot 110, and the drill pipe 40 with the lifting device is lifted out of the well; the method of screwing the lifting beam into and out of the slot 110 realizes the rapid connection and separation between the drill pipe 40 and the casing to be lowered into the well 10; the whole device is simple to process and operate, and saves costs.

[0040] The specific working process of the device for quickly lifting the casing downhole is as follows: the second-level or third-level casing 10 to be lowered into the hole is lowered into the hole, and the two clamping grooves 110 on the upper part of the casing 10 to be lowered into the well are respectively arranged at the wellhead, and the thread of the lifting short section 20 is connected with the drill pipe 40, and the drill pipe 40 is pulled up, and the two ends of the lifting beam 30 are aligned with the clamping groove 110 of the sleeve, and the two ends of the lifting beam 30 are respectively placed in the clamping groove Ⅰ and the clamping groove Ⅱ of the casing 10 to be lowered into the well, and the drill pipe 40 is rotated to allow the two ends of the lifting beam 30 to be clamped into the clamping positioning part 112 of the clamping groove 110 of the casing 10 to be lowered into the well. Pull up the drill rod 40 and the casing 10 to be lowered into the well, and continue to add the drill rod 40, lower the casing 10 to the well into place, loosen the drill rod 40, rotate the drill rod 40 and slowly lift it, the lifting beam 30 withdraws from the I and II slots 110 of the casing 10 to be lowered into the well, and pulls out the drill rod 40 and the lifting short section 20 to the outside of the well.

[0041] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quick lifting device for a casing in a well, characterized in that: include: A lifting pup joint (20), the top of which is connected to a drill pipe (40), and a lifting beam (30) is horizontally arranged on the lifting pup joint (20); With the axis of the casing (10) to be lowered into the well as the center of symmetry, two clamping grooves (110) are symmetrically arranged on the wall of the casing (10) to be lowered into the well, and the clamping grooves (110) include mutually connected extension parts and clamping positioning parts, and the extension parts extend downward from the top of the wall of the casing (10) to be lowered into the well, and the extension direction of the clamping positioning part forms a clamping angle with the extension direction of the extension part, so that when the lifting beam (30) is guided downward by the extension part to move to its bottom, the lifting beam (30) is driven into the clamping positioning part by the rotation of the drill pipe, thereby realizing the connection between the casing (10) to be lowered into the well and the drill pipe (40).

2. The quick-lifting device for casing in a well according to claim 1 is characterized in that: The clamping groove (110) is located on the inner side of the wall of the casing (10) to be lowered into the well; Or the clamping groove (110) is arranged through the wall of the casing (10) to be lowered into the well.

3. The quick-lifting device for casing in a well according to claim 1 is characterized in that: The extending direction of the extending portion is parallel to the axis of the casing (10) to be lowered into the well.

4. The quick-lifting device for casing in a well according to claim 1 is characterized in that: The extension portion extends obliquely downward along the wall of the casing (10) to be lowered into the well.

5. The quick-lifting device for casing in a well according to claim 1 is characterized in that: The extending direction of the clamping and positioning portion is the circumferential direction of the casing (10) to be lowered into the well where the bottom of the extending portion is located.

6. The quick-lifting device for casing in a well according to claim 5, characterized in that: The clamping positioning portion is provided with a limiting portion extending toward the top of the casing (10) to be lowered into the well at one end away from the extending portion.

7. The quick-lifting device for casing in a well according to claim 1, characterized in that: The extending direction of the clamping and positioning portion is from the bottom of the extending portion to the top of the casing (10) to be lowered into the well.

8. The quick-lifting device for casing in a well according to claim 1, characterized in that: The lifting beam (30) and the lifting short section (20) form a ┴-shaped structure or a ┼-shaped structure.

9. The quick-lifting device for casing in a well according to claim 1, characterized in that: A rib plate (50) is provided between the lifting beam (30) and the lifting short section (20), and two adjacent side walls of the rib plate (50) are respectively connected to the outer wall of the lifting beam (30) and the outer wall of the lifting short section (20).

10. The quick-lifting device for casing in a well according to claim 1, characterized in that: The top of the lifting short section (20) is connected to the bottom of the drill pipe (40) via a variable thread joint.

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