CN-122014123-A - Oil pipe inner scale foam anti-sedimentation short joint and manufacturing method

Abstract

The invention provides an oil pipe inner scale foam anti-sedimentation short circuit and a manufacturing method, which belong to the technical field of oil pumping unit exploitation in petroleum industry, and comprise a sucker rod short circuit, a sheath, a fiber ring and a spring, wherein the sucker rod short circuit comprises a body, and an upper joint and a lower joint which are arranged at two ends of the body; the number of the sheath and the number of the fiber rings are multiple, the sheath and the fiber rings are alternately sleeved on the body of the sucker rod short circuit, the middle part of the sucker rod short circuit is cut off, and after the sheath, the fiber rings and the springs are installed, the cut parts are connected into a whole through connecting couplings. The invention is provided with a plurality of fiber rings, and solid particles such as deposited scale foam, powder sand and the like are intercepted in advance, so that the solid particles are prevented from directly depositing to a position easy to clamp a pump, and the problem of well pump clamping caused by the deposition of the solid particles can be solved.

Inventors

• JING ZHONGFENG
• LI FANG
• Li Ningying
• DONG CHUANBIN
• YANG YANG
• WEI WEN
• LI KAIKAI
• ZHU XIANGQIAN
• WEI BO
• ZHENG YANFEN
• MA SHIYING
• LIU XIAOQIANG
• JIANG YUANYUAN
• ZHAO TING
• BAI FANGFANG
• CHENG BO
• YANG JING
• ZHAO XUDONG
• WANG GUANGLUN
• BI LINLIN
• LI NAISHI
• CHEN BO
• LI BO
• LI LONGLONG

Assignees

• 中国石油天然气股份有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (10)

1. 1. The oil pipe inner scale foam anti-sedimentation short circuit is characterized by comprising a sucker rod short circuit (1), a sheath (2), a fiber ring (3) and a spring (5), wherein the sucker rod short circuit (1) comprises a body (103) and an upper connector (101) and a lower connector (102) which are arranged at two ends of the body (103), the sheath (2) and the fiber ring (3) are multiple, the sheath (2) and the fiber ring (3) are alternately sleeved on the body (103) of the sucker rod short circuit (1), the middle part of the sucker rod short circuit (1) is cut off, and after the sheath (2), the fiber ring (3) and the spring (5) are installed, the cut is connected into a whole through a connecting coupling (4).
2. 2. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 1, wherein two springs (5) are sleeved on two sections of bodies (103) close to the notch, the springs (5) are positioned between the connecting coupling (4) and the corresponding fiber ring (3), and two ends of the connecting coupling (4) are respectively contacted with the corresponding springs (5) and form a pre-tightening state for the corresponding fiber ring (3) and the sheath (2).
3. 3. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 2 is characterized in that a limit gasket is arranged between the spring (5) and the fiber ring (3).
4. 4. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 1, wherein the fiber ring (3) comprises fiber wires (6) and a limiting ring (7), the limiting ring (7) is sleeved on the body (103) of the oil pumping rod short circuit (1), and the fiber wires (6) are circumferentially arranged outside the circumference of the limiting ring (7).
5. 5. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 4, wherein the limiting ring (7) is a hollow ring body with a groove (8) on the outer wall.
6. 6. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 5, wherein the groove (8) of the limiting ring (7) is used for fixing the fiber filaments (6).
7. 7. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 4, wherein the fiber wires (6) are circumferentially distributed outside the circumference of the limiting ring (7) to form a ring brush shape, and the maximum outer diameter of the fiber wires is larger than the inner diameter of the oil pipe.
8. 8. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 1, wherein the sheath (2) is hollow cylindrical, and the inner diameter of the sheath (2) is matched with the outer diameter of the body (103) of the sucker rod short circuit (1).
9. 9. The oil pipe inner scale foam anti-sedimentation short circuit according to claim 1, wherein the upper joint (101) is connected with a coupling.
10. 10. The method for manufacturing the anti-sedimentation short circuit for the scale foam in the oil pipe according to any one of claims 1 to 9 is characterized by comprising the following specific steps: firstly, cutting a complete sucker rod short circuit (1) into two sections, and processing screw threads at the cut positions; Then sheathing the sheath (2) and the fiber ring (3) from the incision in sequence; Then the springs (5) are respectively arranged into the sucker rod short circuits (1) which are cut into two sections from the cut; Finally, the sucker rod short circuit (1) which is cut into two sections is connected into a whole at the cut through the connecting coupling (4), so that the anti-sedimentation short circuit for the scale foam in the oil pipe is formed.

Description

Oil pipe inner scale foam anti-sedimentation short joint and manufacturing method Technical Field The invention belongs to the technical field of oil pumping unit exploitation in the petroleum industry, and particularly relates to an oil pipe inner scale foam anti-sedimentation short circuit and a manufacturing method thereof. Background In the oil field production process, an oil well is in a mechanical oil extraction system consisting of an oil pipe, an oil pumping rod and an oil well pump. When the scale is formed in the pipe column, the sucker rod and the anti-abrasion block which move repeatedly rub the pipe wall repeatedly, so that the scale flakes fall off or are ground into powder. When the pumping unit stops the well due to intermittent on-off and unexpected power-off, the scale foam suspended in the liquid can be deposited along the inner cavity of the pipe column and directly accumulated in the outlet position of the oil pump or the gap between the piston and the pump barrel. The longer the well stop time is, the more dirt and foam are accumulated, when the pumping unit resumes operation, the dirt and foam very easily enter the clearance between the piston and the pump barrel, and the pump clamping fault is caused, so that the high-frequency ineffective repair of the oil well is caused. At present, the problem is not studied temporarily on a production site, although a fishing cup structure used during grinding is proposed to solve the problem, the fishing cup is large in size and only suitable for temporary use, if the fishing cup is used for reciprocating motion along with an oil pump up and down (the oil pipe and a sucker rod can shrink and stretch under the influence of stress during up and down strokes) for a long time, the fishing cup is large in size and extremely easy to grind the oil pipe, so that a new problem is caused, and therefore, the scheme cannot be applied on site. Traditional scale prevention measures comprise methods for adding chemical agents or adding magnetic fields to inhibit, and only the scale formation amount can be reduced from the source, but the scale formation amount is not effective on the part of the inner cavity of the oil pipe, and particularly solid particles produced in the stratum cannot be basically prevented from entering a pump cylinder, migrating and settling. Therefore, the traditional scale inhibition measures are not beneficial to solving the problem of pump blockage caused by sedimentation of scale foam and solid particles in the inner cavity of the oil pipe. The retrieved bulletin number is CN211287547U, discloses an anti-scaling nipple, belongs to the field of casing connectors for petroleum drilling, structurally comprises a casing coupling and a nipple body, wherein the casing coupling is an API casing coupling, a standard casing box is arranged in the casing coupling, the nipple body is of a tubular structure, two ends of the nipple body are casing pin buckles, one end of the nipple body is matched and connected with the casing box at one end of the casing coupling through the casing pin buckles, the other end of the casing coupling is connected with a casing, and an anti-scaling coating is arranged on the inner wall of the nipple body. The anti-scaling nipple solves the essential problem of scaling, so that scaling is not generated and is not corroded, thereby saving the construction of well stopping, working on a well, lifting a pipe column and the like caused by physical and chemical scale removal, saving the cost and prolonging the use time of an oil-water well. Water injection wells developed in the current oil field have been developed for many years, well bore scaling has become frequent and complex gradually, and in recent years, part of the oil wells have been subjected to a production system that is intermittently operated for a period of time to reduce the consumption of ineffective power. When the oil well production is converted from a motion state to a pumping stop and rest state, the liquid which is kept rising in the oil pipe is changed into a rest state, and the dirt pieces falling off from the inner wall of the oil pipe and impurities such as silt and the like pumped out from the stratum can be deposited downwards and accumulated on the inner barrel and the upper part of the piston of the oil pump. Because the scale flakes and the silt have certain hardness (poor compressibility), the scale flakes and the silt can be effectively adhered to the surface of the inner cylinder of the oil pump under the action of temperature and pressure after being accumulated for a long time. Because the clearance between the piston of the oil-well pump and the pump barrel is very small, when the production is resumed next time, the deposited and attached dirt, foam, powder sand and other objects are easy to cause the blocking accident (short for blocking pump) between the piston and the oil-well pump barrel, so that the oil pipe rod of the whole w