Pumping well under-pressure pump bottom detection device
By designing the bottom device of the machine pumping pressure probe pump, the bottom operation of the pressure probe pump without pressing the well and relieving the pressure is solved, and the problems of long and high cost of pressure and relieving the pressure in the existing technology are achieved efficient and safe production operations, and significant economic benefits are brought.
Patent Information
- Application Number
- CN202421899601.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The prior art requires well pressing and pressure relief when performing machine pumping, resulting in long time, high cost and low production time.
A bottom device for pumping well with pressure detection pump is designed. Through the extended body and the adapted sealing structure, the bottom operation of pump detection pump is carried out without pressing the well and relieving the pressure.
The device can complete the bottom operation of the pump under pressure under pressure, save time and expenses of pressing wells and pressure relief, improve production time, reduce labor intensity, and achieve an average annual cost reduction and efficiency increase of about 780,000 yuan.
Smart Images
Figure CN222924422U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of an auxiliary device for adjusting the anti - impact distance, detecting the pump bottom or adjusting the anti - impact distance operation of a machine - pumped well, and particularly relates to a pressure - bearing pump bottom detection device for a machine - pumped well. Background Technique
[0002] The currently commonly used oil pumping method is to use a pumping unit, and the pumping unit drives the plunger of a tubular pump located in the well to move up and down repeatedly through a polished rod (original well polished rod). During this oil pumping process, it is necessary to know the actual anti - impact distance when the pumping unit well pumps oil (the anti - impact distance refers to a distance that the plunger is lifted upward after being lowered to the bottom in order to prevent the plunger from colliding with the fixed valve at the bottom of the pump barrel of the tubular pump). Currently, the conventional operation is to add a certain length of short sucker rod section at the lower end of the original well polished rod to lower the plunger to the fixed valve. The original well polished rod passes through a manual double - gate blowout preventer above the wellhead and is sealed by an original seal. The joint between the original well polished rod and the manual double - gate blowout preventer is set as a sliding seal. Therefore, when it is necessary to add a certain length of short sucker rod section at the lower end of the original well polished rod, the original seal needs to be removed first. However, because there is pressure at the wellhead, the original seal cannot be directly removed. At this time, it is necessary to cooperate with a pump truck and a water truck to conduct a well killing operation, and the wellhead can be opened for construction operations only under the condition that there is no pressure at the wellhead. This method has the following disadvantages:
[0003] Implementing the well killing operation has problems such as long well killing time, large amount of well killing fluid, pressure relief and observation waiting time, which affect production efficiency and increase the construction operation cost.
[0004] Therefore, a set of devices for detecting the pump bottom operation without well killing and without pressure relief and with pressure - bearing has been invented. Summary of the Invention
[0005] The technical problem to be solved by the utility model is to provide an auxiliary device for detecting the pump bottom operation without well killing and without pressure relief and with pressure - bearing.
[0006] The provided technical solution is as follows:
[0007] A pressure - bearing pump bottom detection device for a machine - pumped well, which is used in cooperation with a blowout preventer at the wellhead, includes an elongated body with a length. One end of the elongated body along its length is detachably connected to the upper end of the original well polished rod, and when the two are connected, they form a combined polished rod. It also includes a sealing structure for sealing the upper through - hole of the blowout preventer. During operation, the combined polished rod can pass through the sealing structure and the two are set as a sliding seal.
[0008] Preferably, the sealing structure does not include the original seal installed on the inner peripheral side of the upper through hole of the blowout preventer. The sealing structure includes a cylinder body with both upper and lower ends open. The lower end of the cylinder body is detachably connected to the upper through hole of the blowout preventer. The sealing structure further includes a first sealing unit provided at the upper end of the cylinder body for sealing the upper opening of the cylinder body. During operation, the combined polished rod can pass through the first sealing unit and is provided with a sliding seal therebetween. A pressure relief port communicating with the inside of the cylinder body is also provided on the side wall of the cylinder body, and a pressure relief shut-off valve is installed outside the pressure relief port.
[0009] Preferably, the extension body is a rod body, and further includes an anti-disengagement cap for detachably connecting the rod body to the original well polished rod. Both upper and lower ends of the anti-disengagement cap are provided with internal threads, namely upper internal thread and lower internal thread respectively. An external thread matching the upper internal thread is provided on a lower section of the rod body, and the external thread on the upper section of the original well polished rod matches the lower internal thread. The anti-disengagement cap forms a part of the combined polished rod.
[0010] Preferably, the outer diameter of the rod body is not less than the outer diameter of the original well polished rod.
[0011] Preferably, the first sealing unit includes a gland nut, packing, and a gland for pressing the packing. Connecting internal threads are provided on the inner peripheral side of the gland nut. The upper section of the cylinder body forms a combined section, and a circumferential protrusion extending inward is formed at a lower position on the inner peripheral side of the combined section. Connecting external threads are provided on the outer peripheral side of the combined section, and the connecting external threads match the connecting internal threads. An annular space is formed between the rod body and the inner peripheral side of the combined section, and the bottom of the annular space is the circumferential protrusion. The packing and the gland are both filled in the annular space. The lower end of the packing abuts against the circumferential protrusion, and the gland is located above the packing. When the gland nut is screwed onto the combined section, it can press down the gland.
[0012] Preferably, lower external threads are provided on the outer peripheral side of the lower section of the cylinder body, and the lower external threads match the internal threads provided on the inner peripheral side of the upper through hole of the blowout preventer.
[0013] Preferably, lower external threads are provided on the outer peripheral side of the lower section of the cylinder body, and further includes a reducer joint. Connecting internal threads matching the lower external threads are provided on the upper inner peripheral side of the reducer joint, and external threads matching the internal threads provided on the inner peripheral side of the upper through hole of the blowout preventer are provided on the lower inner peripheral side of the reducer joint.
[0014] Preferably, the pressure relief shut-off valve communicates with a pressure gauge.
[0015] Preferably, the sealing structure is an original seal installed on the inner peripheral side of the upper through-hole of the blowout preventer, and the lengthening body is a round rod. The size of the combined polished rod formed after connecting the round rod to the original polished rod in the well in the radial direction is equal to the outer diameter of the original polished rod in the well.
[0016] Preferably, the original seal includes an original gland nut, original packing, and an original gland for pressing the original packing. The original gland nut is provided with an external thread that matches the internal thread provided on the inner peripheral side of the upper through-hole of the blowout preventer. The original packing and the original gland for pressing the original packing are filled between the original polished rod in the well and the inner peripheral side of the upper through-hole and are pressed tightly by the original gland nut.
[0017] The technical effects of the provided rod pumping well pressure-bearing pump bottom exploration device are as follows:
[0018] By setting a lengthening body and matching it with a suitable sealing structure, this device can complete the operation of exploring the pump bottom under pressure. It can implement the operation of exploring the pump bottom and bumping the pump without killing the well, saving the construction cost of the well-killing pump truck and the cost of brine transfer; reducing the shutdown time of the well formed by well killing and pressure relief, reducing the liquid drainage time of the oil well caused by well killing, reducing the labor intensity of the on-site workers, and improving the production efficiency; the device has a simple structure, and the installation and disassembly operations are quick, convenient, time-saving, labor-saving, safe and reliable; the cost of manufacturing a set of this device is 2,000 yuan. The total cost of the pump truck operation and brine transfer for killing the well once on average is about 7,000 yuan. The total time for killing the well with 120 cubic meters of brine and stable observation is 8 hours, and the liquid drainage time after pumping is 72 hours. Calculated based on the average oil increase of about 16 tons per well in 80 hours, the oil increase cost is 16 tons × 2,000 yuan = 32,000 yuan. The oil increase cost of 32,000 yuan + the well-killing operation and transfer cost of 7,000 yuan = 39,000 yuan. There are more than 500 wells in the whole factory, and the average number of times of exploring the pump bottom or bumping the pump per well per year is 20 times. 39,000 yuan × 20 = 780,000 yuan. Therefore, using this device can reduce costs and increase efficiency by about 780,000 yuan per year.
[0019] Preferably, the sealing structure does not include the original seal installed on the inner peripheral side of the upper through-hole of the blowout preventer. The sealing structure includes a cylinder body with both upper and lower ends open. The lower end of the cylinder body is detachably connected to the upper through-hole of the blowout preventer. The sealing structure further includes a first sealing unit installed at the upper end of the cylinder body to seal the upper opening of the cylinder body. During operation, the combined polished rod can pass through the first sealing unit and is arranged in a sliding seal therewith. A pressure relief port communicating with the inside of the cylinder body is also provided on the side wall of the cylinder body, and a pressure relief stop valve is installed outside the pressure relief port. When using this sealing structure: first close the blowout preventer, then remove the original seal on the inner peripheral side of the upper through-hole of the blowout preventer, then connect the lower end of the cylinder body to the upper through-hole, install the first sealing unit at the upper opening of the cylinder body, then close the pressure relief stop valve, and then open the blowout preventer; then the combined polished rod can be lifted by a crane to perform the operation of detecting the bottom of the pump under pressure.
[0020] Preferably, the anti-disengagement cap is part of the combined polished rod and can be combined with extension bodies of different diameters for use, improving the operability options.
[0021] Preferably, a reducing joint is further included, which can match blowout preventers of different models.
[0022] Preferably, the sealing structure is the original seal installed on the inner peripheral side of the upper through-hole of the blowout preventer. The extension body is a round rod, and the dimension of the combined polished rod formed after connecting the round rod to the original well polished rod in the radial direction is equal to the outer diameter of the original well polished rod. This setting can also achieve the operation under pressure. However, compared with the previous different sealing structures, the strength at the joint position of the original well polished rod and the extension body of this sealing structure is weaker than the previous method. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic structural diagram of a specific embodiment of the provided device for detecting the bottom of the pump under pressure in a rod pumping well.
[0024] Figure 1 The reference numerals in the drawings are as follows:
[0025] 1 Extension body, 2 Combined polished rod, 3 Cylinder body, 4 Blowout preventer, 5 Pressure relief stop valve, 6 Anti-disengagement cap, 7 Compression nut, 8 Packing, 9 Gland, 10 Circumferential protrusion, 11 Reducing joint, 12 Pressure gauge, 13 Φ28 packing gland, 14 Φ28 packing stuffing box, 15 Original well polished rod, 16 Upper through-hole. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following will further describe the present invention in detail.
[0027] The present utility model will be described in more detail below with reference to the accompanying drawings, in which preferred embodiments of the present utility model are shown. It should be understood that those skilled in the art can modify the present utility model described herein while still achieving the beneficial effects of the present utility model. Therefore, the following description should be understood as a broad knowledge for those skilled in the art and not as a limitation to the present utility model.
[0028] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they would obscure the present utility model with unnecessary details. It should be considered that in the development of any actual embodiment, numerous implementation details must be made to achieve the specific goals of the developer.
[0029] To make the purpose and features of the present utility model more obvious and understandable, the following further describes the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, only for the convenience of clearly assisting in explaining the purpose of the embodiments of the present utility model.
[0030] Combined Figure 1 , Figure 1 is a structural schematic diagram of a specific implementation manner of the provided pressure - detecting pump bottom device for a machine - pumped well.
[0031] The provided pressure - detecting pump bottom device for a machine - pumped well, which is used in cooperation with the blowout preventer 4 at the wellhead, includes an elongated body 1 having a length. One end of the elongated body 1 along its length direction is detachably connected to the upper end of the original well polished rod 15. When connected, they form a combined polished rod 2. The length of the elongated body 1 is set such that the combined polished rod 2 can drive the plunger to be lowered to the fixed valve in the well. It also includes a sealing structure for sealing the upper through - hole 16 of the blowout preventer 4. During operation, the combined polished rod 2 can pass through the sealing structure and they are arranged in a sliding seal.
[0032] The device is provided with an extension body 1 and a matching sealing structure, which can realize the operation of probing the bottom of the pump under pressure. It can implement the operation of probing the bottom of the pump and bumping the pump without killing the well, saving the construction cost of the well-killing pump truck and the cost of brine transfer; reducing the shut-in time caused by well killing and pressure relief, reducing the liquid drainage time of the oil well caused by well killing, reducing the labor intensity of the post workers, and improving the production efficiency; the device has a simple structure, is quick and convenient to install and disassemble, time-saving and labor-saving, safe and reliable; the cost of manufacturing a set of this device is 2,000 yuan, the total cost of the pump truck operation and brine transfer for killing the well once is about 7,000 yuan on average, the total time for killing the well with 120 cubic meters of brine and stable observation is 8 hours, and the liquid drainage time after pumping is 72 hours. Calculated according to the average oil increase of about 16 tons per well in 80 hours, the oil increase cost is 16 tons × 2,000 yuan = 32,000 yuan, the oil increase cost 32,000 + the well-killing operation and transfer cost 0.7 = 39,000 yuan. There are more than 500 wells in the whole factory, and the bottom of the pump or the pump is bumped about 20 times per year on average. 39,000 × 20 = 780,000 yuan. Then, using this device can reduce costs and increase efficiency by about 780,000 yuan per year.
[0033] Combined with Figure 1 , in a specific embodiment, the sealing structure does not include the original seal installed on the inner peripheral side of the upper through hole 16 of the blowout preventer 4. The sealing structure includes a cylinder body 3, both the upper and lower ends of the cylinder body 3 are open, the lower end of the cylinder body 3 is detachably connected to the upper through hole 16 of the blowout preventer 4, the sealing structure further includes a first sealing unit, and the upper end of the cylinder body 3 is provided with the first sealing unit for sealing the upper opening of the cylinder body 3. During operation, the combined polished rod 2 can pass through the first sealing unit and the two are arranged in a sliding seal. A pressure relief port communicating with the inside of the cylinder body 3 is also opened on the side wall of the cylinder body 3, and a pressure relief stop valve 5 is installed outside the pressure relief port.
[0034] When the sealing structure is used: first close the blowout preventer 4, then remove the original seal on the inner peripheral side of the upper through hole 16 of the blowout preventer 4, then connect the lower end of the cylinder body 3 to the upper through hole 16, and install the first sealing unit on the upper opening of the cylinder body 3. Then close the pressure relief stop valve 5 and open the blowout preventer 4; then the combined polished rod 2 can be lifted by a crane to realize the operation of probing the bottom of the pump under pressure. After the relevant operation is completed, the sealing structure can be removed and the original seal can be installed.
[0035] In this specific embodiment, as Figure 1 shown, the extension body 1 is a rod body, and further includes an anti-detachment cap 6, which is used for the detachable connection between the rod body and the original well polished rod 15. Internal threads are opened at both the upper and lower ends of the anti-detachment cap 6, namely upper internal thread and lower internal thread. External thread matching the upper internal thread is opened on a lower section of the rod body, and the external thread on the upper section of the original well polished rod 15 matches the lower internal thread. The anti-detachment cap 6 forms a part of the combined polished rod 2.
[0036] In a specific embodiment, the outer diameter of the rod body is not less than the outer diameter of the original well polished rod 15, which can ensure the strength of the combined polished rod 2.
[0037] Combined with Figure 1 , in this specific embodiment, the first sealing unit includes a gland 7, packing 8 and a lantern ring 9 for pressing the packing 8. An internal connecting thread is provided on the inner peripheral side of the gland 7. The upper section of the cylinder body 3 is formed as a combined section. A circumferential protrusion 10 extending inward is formed at the lower position of the inner peripheral side of this combined section. An external connecting thread is provided on the outer peripheral side of this combined section, and this external connecting thread matches the internal connecting thread. An annular space is formed between the rod body and the inner peripheral side of the combined section. The bottom of this annular space is the circumferential protrusion 10. Both the packing 8 and the lantern ring 9 are filled in the annular space. The lower end of the packing 8 abuts against the circumferential protrusion 10, and the lantern ring 9 is located above the packing 8. When the gland 7 is screwed to the combined section, it can press down the lantern ring 9. Figure 1 What is shown in Figure 1 is a rod body with an outer diameter of Φ38. Of course, the size of the rod body can be replaced according to the actual situation. For example,
[0038] In a specific embodiment, lower external threads are provided on the outer peripheral side of the lower section of the cylinder body 3, and these lower external threads match the internal threads provided on the inner peripheral side of the upper through hole 16 of the blowout preventer 4.
[0039] As Figure 1 shown, lower external threads are provided on the outer peripheral side of the lower section of the cylinder body 3. A reducing joint 11 is further included. Internal threads matching the lower external threads are provided on the upper inner peripheral side of the reducing joint 11, and external threads matching the internal threads provided on the inner peripheral side of the upper through hole 16 of the blowout preventer 4 are provided on the lower inner peripheral side of the reducing joint 11, which can match blowout preventers 4 of different models.
[0040] In a specific embodiment, as Figure 1 shown, the pressure relief stop valve 5 is connected to a pressure gauge 12, which is convenient for observing the pressure relief situation in real time.
[0041] In another specific embodiment, the sealing structure is an original seal installed on the inner peripheral side of the upper through hole 16 of the blowout preventer 4. The extension body 1 is a round rod, and the dimension of the combined polished rod 2 formed after connecting the round rod to the original well polished rod 15 in the radial direction is equal to the outer diameter of the original well polished rod 15. The connection method can be: an internal thread is provided on the upper section of the original well polished rod 15, and a matching external thread is provided on the outer peripheral side of the lower section of the round rod, so that the two are threadedly connected to form the combined polished rod 2.
[0042] Wherein, the original seal includes an original gland nut, original packing, and an original gland for pressing the original packing. The original gland nut is provided with an external thread that matches the internal thread provided on the inner peripheral side of the upper through hole of the blowout preventer. The original packing and the original gland for pressing the original packing are filled between the original well polished rod and the inner peripheral side of the upper through hole and are pressed by the original gland nut. The specific setting of this original seal is prior art and will not be described in conjunction with corresponding drawings here.
[0043] This setting can also achieve work under pressure. However, compared with the aforementioned different sealing structures, the strength at the joint position of the original well polished rod 15 and the extension body 1 of this sealing structure will be weaker than the aforementioned method.
[0044] The above shows and describes the basic principles, main features, and advantages of the present invention. Therefore, the above is only an embodiment of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention also includes various equivalent changes and improvements, and these changes and improvements will all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A pump bottom device with pressure probe for pumping wells, which is used in conjunction with a blowout preventer at the wellhead, and is characterized in that: It includes an elongated body with a length, one end of which along the length direction can be detachably connected to the upper end of the original well polished rod. When the two are connected, they are combined to form a combined polished rod. It also includes a sealing structure for sealing the upper through hole of the blowout preventer. When working, the combined polished rod can pass through the sealing structure and the two are arranged in a sliding seal.
2. The pump bottom device for pumping wells with pressure detection according to claim 1 is characterized in that: The sealing structure does not include the original sealer installed on the inner peripheral side of the upper through hole of the blowout preventer. The sealing structure includes a cylinder, and the upper and lower ends of the cylinder are both open. The lower end of the cylinder can be detachably connected to the upper through hole of the blowout preventer. The sealing structure also includes a first sealing unit. The upper end of the cylinder is provided with the first sealing unit for sealing the upper opening of the cylinder. During operation, the combined light rod can pass through the first sealing unit and the two are arranged in a sliding seal. A pressure relief port connected to the cylinder is also opened on the side wall of the cylinder, and a pressure relief stop valve is installed on the outer side of the pressure relief port.
3. The pump bottom device for pumping wells with pressure detection according to claim 2 is characterized in that: The extended body is a rod body and also includes an anti-drop cap, which is used for the detachable connection between the rod body and the original well polished rod. The upper and lower ends of the anti-drop cap are provided with internal threads, which are an upper internal thread and a lower internal thread respectively. A lower section of the rod body is provided with an external thread that matches the upper internal thread, and the external thread of the upper section of the original well polished rod matches the lower internal thread. The anti-drop cap forms a part of the combined polished rod.
4. The pump bottom device for pumping wells with pressure probe according to claim 3 is characterized in that: The outer diameter of the rod body is not less than the outer diameter of the original well polished rod.
5. The pump bottom device for pumping wells with pressure detection according to claim 4 is characterized in that: The first sealing unit includes a pressure cap, a packing and a gland for pressing the packing, the inner circumference of the pressure cap is provided with a connecting internal thread, the upper section of the cylinder is formed as a coupling section, a circumferential protrusion extending inward is formed at the lower position of the inner circumference of the coupling section, a connecting external thread is provided on the outer circumference of the coupling section, the connecting external thread matches the connecting internal thread, an annular space is formed between the rod body and the inner circumference of the coupling section, the bottom of the annular space is the circumferential protrusion, the packing and the gland are both filled in the annular space, the lower end of the packing is abutted against the circumferential protrusion, the gland is located above the packing, and the pressure cap can press down the gland when it is screwed to the coupling section.
6. The pump bottom device for pumping wells with pressure detection according to claim 5 is characterized in that: A lower external thread is provided on the outer circumference side of the lower section of the cylinder, and the lower external thread matches the internal thread provided on the inner circumference side of the upper through hole of the blowout preventer.
7. The pump bottom detection device for pumping wells with pressure as claimed in claim 5 is characterized in that: The outer circumference of the lower section of the cylinder body is provided with a lower external thread, and also includes a reducer, the upper inner circumference of the reducer is provided with an internal thread matching the lower external thread, and the lower inner circumference of the reducer is provided with an external thread matching the internal thread provided on the inner circumference of the upper through hole of the blowout preventer.
8. The pump bottom device for pumping wells with pressure probe according to claim 2, characterized in that: The pressure relief stop valve is connected to a pressure gauge.
9. The pump bottom device for pumping wells with pressure probe according to claim 1, characterized in that: The sealing structure is an original sealer installed on the inner peripheral side of the upper through hole of the blowout preventer, and the elongated body is a round rod. The radial dimension of the combined polished rod formed after the round rod is connected to the original well polished rod is equal to the outer diameter of the original well polished rod.
10. The pump bottom device for pumping wells with pressure detection according to claim 9, characterized in that: The original sealer includes an original pressure cap, an original packing and an original gland for pressing the original packing. The original pressure cap is provided with an external thread matching the internal thread provided on the inner circumference of the upper through hole of the blowout preventer. The original packing and the original gland for pressing the original packing are filled between the original well polished rod and the inner circumference of the upper through hole and are pressed by the original pressure cap.