Suspension type well completion casing pressure test tool
By designing a suspended completion casing pressure test tool, the drill rod buckle change casing buckle joint and high-pressure gate are used to achieve efficient pressure test of the oil well casing, which solves the problem of low production time after half-series of the oil well, and achieves efficient casing pressure test and leakage detection operations.
Patent Information
- Application Number
- CN202422720165.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-11-08
AI Technical Summary
In the prior art, the oil wells must be cemented half-way through the well, a small drill rod must be used to pass through the well, and the small drill rod must be lifted out before the completion casing is tested, resulting in low production time.
A suspended completion casing pressure test tool is designed, including a drill rod buckle transformed casing buckle joint, a drill rod tube card and a high-pressure gate. It is connected to the suspended completion casing pressure test joint through a 73mm drill rod to realize the casing pressure test, and the drill rod will be thrown after the pressure test is passed. If the pressure test is not qualified, it will directly find leakage in sections.
While saving production time, protecting the oil wellhead, an efficient casing pressure test process is achieved, and direct salvage bridge plug operation that fails to meet the pressure test is avoided.
Smart Images
Figure CN223062386U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of well completion pressure testing, in particular to a hanging well completion casing pressure testing tool. Background Technique
[0002] Well completion refers to the process of connecting the bottom of the oil well and the oil layer in a certain structure after the open-hole well reaches the designed well depth. Well completion is the last important link in drilling work and the beginning of oil production engineering. It is closely connected with subsequent oil production, water injection and the development of the entire oilfield. The technological content of well completion mainly includes: drilling the production layer, connecting the wellbore and the production layer (i.e., the well completion method, including the entire technological process of running casing, cementing, and perforating or the technological process of running a screen pipe and gravel packing), installing the wellhead device, and trial production, etc. These technological processes are respectively undertaken by different production departments. The main task of well completion is to ensure good connection between the wellbore and the reservoir, enable the well to have high production, and at the same time maintain the long-term stability of the wellbore, so that the well can have stable production for a relatively long time. The quality of oil well completion directly affects the production capacity and economic life of the oil well, and even relates to whether the entire oilfield can be reasonably developed.
[0003] In the last process of drilling, well completion pressure testing, that is, casing pressure testing. After semi-casing cementing of the oil well (no cementing in the horizontal section), it is necessary to use a small drill pipe to clean the well, set a bridge plug and pull out the small drill pipe before the well completion casing pressure testing can be carried out. In order to save production efficiency and protect the wellhead at the same time, it is necessary to design a hanging well completion casing pressure testing tool. Summary of the Invention
[0004] The purpose of the utility model is to provide a hanging well completion casing pressure testing tool to solve the problem that after semi-casing cementing of the oil well, it is necessary to use a small drill pipe to clean the well, set a bridge plug and pull out the small drill pipe before the well completion casing pressure testing can be carried out as mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A hanging well completion casing pressure testing tool includes a drill pipe thread to casing thread joint. An outside end of the female coupling of the drill pipe thread to casing thread joint is installed with a drill pipe clamp. A drill pipe is connected to the end of the female joint collar of the drill pipe thread to casing thread joint. An outside end of the drill pipe thread to casing thread joint is connected with an oil union thread to drill pipe thread joint. The other end of the oil union thread to drill pipe thread joint is threadedly connected with an oil union.
[0006] Further improvement lies in that the drill pipe is a 73mm drill pipe.
[0007] Further improvement lies in that the female thread type of the joint of the drill pipe thread to casing thread joint is 630 type, the inner diameter is 135mm, the male thread end thread type of the drill pipe thread to casing thread joint is LC, the inner diameter is 120mm, and a 25cm step is reserved at the female thread end.
[0008] A further improvement lies in that the joint thread type of the union joint is changed to the 1502 type union thread - 631 type drill pipe thread.
[0009] A further improvement lies in that the drill pipe collar is a pair of semi - circular 73 drill pipe collars with an inner diameter thickness of 60 mm and an inner diameter of 90 mm.
[0010] A further improvement lies in that the drill pipe collar is sleeved between the outside of the reserved step of the female coupling of the drill pipe and the outside of the female coupling of the union joint with the drill pipe thread changed to the casing thread.
[0011] A further improvement lies in that the other end of the union is connected to a 35 MPa - 1502 type high - pressure gate valve.
[0012] A further improvement lies in that a positioning plate is fixedly connected to the lower side of the outside of one end of the drill pipe collar, a positioning groove is opened at the lower part inside the other end of the drill pipe collar, a bolt is connected to the lower end inside the drill pipe collar, the outside of the positioning plate is slidably connected to the inside of the positioning groove, a round hole is opened at the lower part inside the drill pipe collar at the position below the positioning groove, a threaded hole is opened at the middle position inside the positioning plate, the outside of the bolt is slidably connected to the inside of the round hole, and the outside of the bolt is threadedly connected to the inside of the threaded hole.
[0013] In summary, the present application discloses a suspended completion casing pressure - testing tool.
[0014] In this technical solution, before running in the 73 mm drill pipe, the suspended completion casing pressure - testing joint is connected to the completion casing. After the 73 mm drill pipe delivers the bridge plug to the position for setting and releasing, two 73 mm drill pipes are tripped out. The 73 mm drill pipe collar is clamped between the female coupling of the 73 mm drill pipe and the female coupling of the suspended completion casing pressure - testing joint, and the 73 mm drill pipe is seated inside the suspended completion casing pressure - testing joint. Then, the union joint with the high - pressure gate valve and the drill pipe thread changed is connected. After connecting to the pressure - testing truck, the completion casing can be pressure - tested. If the pressure test is qualified, the 73 mm drill pipe can be tripped out for completion. If the pressure test is unqualified, the bridge plug can be directly fished and the casing can be pressure - tested in sections to find leaks. Thus, through this pressure - testing method, production efficiency can be saved while protecting the oil wellhead.
[0015] Furthermore, when a pair of drill pipe clamps are clamped between the 73mm drill pipe female coupling and the female coupling of the suspended completion casing pressure test joint, the positioning plate at the outer end of the drill pipe clamp will slide into the positioning groove inside another drill pipe clamp, so as to ensure that when the two drill pipe clamps are connected, the connection positions of the two drill pipe clamps can be accurately positioned. Then, after sliding the bolt into the round hole at the lower end of the drill pipe clamp, the upper part of the bolt is threadedly connected to the threaded hole inside the positioning plate, which can fix the positioning plate to the positioning groove, making the drill pipe clamp more firmly clamped between the 73mm drill pipe female coupling and the female coupling of the suspended completion casing pressure test joint. Moreover, for the structure of the positioning plate and bolt used to fix a pair of drill pipe clamps, the positioning plate is located in the positioning groove inside the drill pipe clamp, and the screw part of the bolt is located in the round hole inside the drill pipe clamp, neither of which is in contact with the outside world, so rust will not occur, and thus it will not affect the subsequent disassembly and assembly of the drill pipe clamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of the main structure of the present utility model;
[0017] Figure 2 is a schematic diagram of the structure at the joint of the drill pipe thread changed to casing thread of the present utility model;
[0018] Figure 3 is a schematic diagram of the structure at the drill pipe clamp of the present utility model;
[0019] Figure 4 is a schematic diagram of the structure at the joint of the union thread changed to drill pipe thread of the present utility model.
[0020] In the figure: 1. Drill pipe thread changed to casing thread joint; 2. Drill pipe clamp; 3. Drill pipe; 4. Union thread changed to drill pipe thread joint; 5. Union; 601. Positioning plate; 602. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0022] Please refer to Figures 1-4 , the present utility model provides a technical solution: a suspended completion casing pressure test tool, including a drill pipe thread changed to casing thread joint 1. The joint female thread type of the drill pipe thread changed to casing thread joint 1 is 630 type, the inner diameter is 135mm, the joint male thread end thread type of the drill pipe thread changed to casing thread joint 1 is LC, the inner diameter is 120mm, and a 25cm step is reserved at the female thread end.
[0023] A drill pipe coupling to casing coupling joint 1 is equipped with a drill pipe clamp 2 at the outer end of the female coupling. The drill pipe clamp 2 is a pair of semi-circular drill pipe clamps for 73 drill pipes with an inner diameter thickness of 60 mm and an inner diameter of 90 mm.
[0024] The female joint hoop end of the drill pipe coupling to casing coupling joint 1 is connected to a drill pipe 3. The drill pipe 3 is a 73 mm drill pipe 3. The drill pipe clamp 2 is sleeved between the outer side of the reserved step of the female coupling of the drill pipe 3 and the outer side of the female coupling of the drill pipe coupling to casing coupling joint 1.
[0025] The outer end of the drill pipe coupling to casing coupling joint 1 is connected to an oil nipple coupling to drill pipe coupling 4. The joint thread type of the oil nipple coupling to drill pipe coupling 4 is 1502 type oil nipple thread - 631 type drill pipe thread.
[0026] The other end of the oil nipple coupling to drill pipe coupling 4 is threadedly connected to an oil nipple 5. The other end of the oil nipple 5 is connected to a 35 MPa - 1502 type high-pressure gate valve.
[0027] A positioning plate 601 is fixedly connected to the lower part of the outer side of one end of the drill pipe clamp 2. A positioning groove is opened in the lower part of the inner side of the other end of the drill pipe clamp 2. A bolt 602 is connected to the lower end inside the drill pipe clamp 2. The outer side of the positioning plate 601 is slidably connected to the inner side of the positioning groove. A round hole is opened in the lower part inside the drill pipe clamp 2 at the position below the positioning groove. A threaded hole is opened in the middle position inside the positioning plate 601. The outer side of the bolt 602 is slidably connected to the inner side of the round hole. The outer side of the bolt 602 is threadedly connected to the inner side of the threaded hole. Thus, when a pair of drill pipe clamps 2 are clamped between the female coupling of the 73 mm drill pipe and the female coupling of the suspended completion casing pressure test joint, the positioning plate 601 at the outer end of the drill pipe clamp 2 will slide into the positioning groove inside the other drill pipe clamp 2. Then, after sliding the bolt 602 into the round hole at the lower end of the drill pipe clamp 2, the upper part of the bolt 602 is threadedly connected to the threaded hole inside the positioning plate 601, which can fix the positioning plate 601 to the positioning groove, making the drill pipe clamp 2 more firmly clamped between the female coupling of the 73 mm drill pipe and the female coupling of the suspended completion casing pressure test joint. Moreover, for the structure of the positioning plate 601 and the bolt 602 used to fix a pair of drill pipe clamps 2, the positioning plate 601 is located in the positioning groove inside the drill pipe clamp 2, and the screw part of the bolt 602 is located in the round hole inside the drill pipe clamp 2, neither of which is in contact with the outside world, so rust will not occur, and thus it will not affect the subsequent disassembly and assembly of the drill pipe clamp 2.
[0028] Working principle: When conducting pressure testing on the completion casing, before running in the 73mm drill pipe 3, connect the suspended completion casing pressure testing joint to the completion casing. After the 73mm drill pipe 3 delivers the bridge plug to the position for setting and releasing, discard two 73mm drill pipes 3. Clamp the 73mm drill pipe clamp 2 between the female coupling of the 73mm drill pipe 3 and the female coupling of the suspended completion casing pressure testing joint, and place the 73mm drill pipe 3 inside the suspended completion casing pressure testing joint. Then, connect the oil union with a high-pressure gate to change the drill pipe coupling joint 4. After connecting to the pressure testing vehicle, conduct pressure testing on the completion casing. If the pressure testing is qualified, the well can be completed and the 73mm drill pipe 3 can be discarded. If the pressure testing is unqualified, directly fish the bridge plug and conduct sectional pressure testing to find leaks.
[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.
Claims
1. A suspended well completion casing pressure testing tool, comprising a drill pipe thread to casing thread adapter (1), characterized in that: A drill pipe coupling converted to a casing coupling joint (1) is installed with a drill pipe clamp (2) at the outer end of the female coupling. The female joint hoop end of the drill pipe coupling converted to a casing coupling joint (1) is connected with a drill pipe (3). The outer end of the drill pipe coupling converted to a casing coupling joint (1) is connected with an oil nipple coupling converted to a drill pipe coupling (4). The other end of the oil nipple coupling converted to a drill pipe coupling (4) is threadedly connected with an oil nipple (5).
2. The suspension type completion casing pressure testing tool according to claim 1, wherein: The drill pipe (3) is a 73mm drill pipe (3).
3. The hanging well completion casing pressure testing tool according to claim 1, characterized in that: The joint female thread type of the drill pipe coupling converted to a casing coupling joint (1) is 630 type, with an inner diameter of 135mm. The joint male thread end thread type of the drill pipe coupling converted to a casing coupling joint (1) is LC, with an inner diameter of 120mm, and a 25cm step is reserved at the female thread end.
4. A suspension type well completion casing pressure testing tool according to claim 1, characterized in that: The joint thread type of the oil nipple coupling converted to a drill pipe coupling (4) is 1502 type oil nipple thread - 631 type drill pipe thread.
5. A hanging well completion casing pressure testing tool according to claim 1, characterized in that: The drill pipe clamp (2) is a pair of semi-circular 73 drill pipe clamps with an inner wall thickness of 60mm and an inner diameter of 90mm.
6. The hanging completion casing pressure testing tool according to claim 1, characterized in that: The drill pipe clamp (2) is sleeved between the outer side of the reserved step of the female coupling of the drill pipe (3) and the outer side of the female coupling of the drill pipe coupling converted to a casing coupling joint (1).
7. A hanging well completion casing pressure testing tool according to claim 1, characterized in that: The other end of the oil nipple (5) is connected with a 35MPa - 1502 type high-pressure gate.
8. A suspension type completion casing pressure testing tool according to claim 5, characterized in that: A positioning plate (601) is fixedly connected to the lower side of the outer end of the drill pipe clamp (2). A positioning groove is opened at the lower part of the other end inside the drill pipe clamp (2). A bolt (602) is connected to the lower end inside the drill pipe clamp (2). The outer side of the positioning plate (601) is slidably connected with the inner side of the positioning groove. A circular hole is opened at the lower part inside the drill pipe clamp (2) at the position below the positioning groove. A threaded hole is opened at the middle position inside the positioning plate (601). The outer side of the bolt (602) is slidably connected with the inner side of the circular hole. The outer side of the bolt (602) is threadedly connected with the inner side of the threaded hole.