CN211115870U - Sand washing liquid returning stop valve - Google Patents
Sand washing liquid returning stop valve Download PDFInfo
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- CN211115870U CN211115870U CN201921839797.9U CN201921839797U CN211115870U CN 211115870 U CN211115870 U CN 211115870U CN 201921839797 U CN201921839797 U CN 201921839797U CN 211115870 U CN211115870 U CN 211115870U
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- stop valve
- sand washing
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- oil pipe
- sand
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Abstract
The utility model belongs to the technical field of oil and gas field tools, specifically provide a sand washing returns liquid stop valve, this stop valve includes top connection, baffle, pressure balance spring, the stop valve body, sits and seals the ball, the ball seat, upper portion oil pipe pin and lower part oil pipe box, when having solved the oil well sand washing among the prior art, the well site still is water everywhere in the process of changing single, can't reach the requirement of environmental protection law, and in the reverse circulation sand washing process, the pump is gone into the liquid flow direction and is returned the liquid flow direction unanimous when sand washing changes single, can't install the single current valve on the tubular column of entering the well, and if the engineering is complicated in the sand washing process, need carry on the positive stroke and recoil, install the single current valve can't satisfy the problem of construction requirement; the utility model discloses can effectively shutoff sand washing operation change single in-process return liquid excessive, solve the polluted environment, effectively guide the site operation, improve ordinary oil pipe sand washing operating efficiency, reduce safe environmental protection risk.
Description
Technical Field
The utility model belongs to the technical field of oil gas field instrument, concretely relates to liquid stop valve is returned to sand washing.
Background
At present, sand washing of oil wells is basically reverse circulation and open operation, return liquid directly enters a sewage drainage pit through a drainage channel after being collected at a well head and is sprinkled on a well site to form a Wangyuan land. With the promulgation of a new environmental protection law, the sand washing mode is not suitable for an operation site, open operation is not advisable, and under the condition that a new process can be replaced, a high-pressure elbow and a high-pressure water hose can be connected to a single oil pipe on the site, so that a large amount of returned liquid is connected to a sand setting tank for recovery. However, in the process of changing single joint, due to the exciting pressure of liquid in the well and the fact that a part of the liquid contains a small amount of gas, when the single joint is connected, the tubing coupling is at a height of 10 meters, the return liquid can be lifted by 10 meters and then spilled, the well site is still everywhere water, and the requirements of the environmental protection law cannot be met. In the process of reverse circulation sand washing, the flow direction of the pumped liquid is consistent with the flow direction of the return liquid when the sand washing is single, a check valve cannot be installed on the well entering pipe column, and if engineering is complex in the process of sand washing, forward washing and reverse washing are required, and the installation of the check valve cannot meet construction requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sand washing returns out liquid stop valve, aim at first when overcoming the oil well sand washing among the prior art, in the process of changing single, because the liquid exists pressure of exciteing in the well, the part still contains a small amount of gas, when connecting single, the oil pipe coupling is at 10 meters eminences, returns out liquid and will be unrestrained after being lifted by 10 meters, and the well site still is water everywhere, can't reach the requirement problem of environmental protection law; the problem that in the prior art, in the reverse circulation sand washing process, the flow direction of pumped liquid is consistent with the flow direction of returned liquid when sand washing is performed for replacing a single sand, a check valve cannot be installed on a well entering pipe column, and if engineering is complex in the sand washing process, forward flushing and reverse flushing are required, and the installation of the check valve cannot meet construction requirements is solved.
Therefore, the utility model provides a sand washing returns out liquid stop valve, including the top connection, the baffle, pressure balance spring, the stop valve body, the seat ball, the ball seat, upper portion oil pipe pin and lower part oil pipe box, upper portion oil pipe pin, the top connection, stop valve body and lower part oil pipe box connect gradually from the top down, the inside of stop valve body has set gradually the baffle from the top down, pressure balance spring, seat ball and ball seat, connect pressure balance spring and baffle and pressure balance spring all to be located the upper portion of stop valve body under the baffle, the ball seat links in the lower part of stop valve body, the seat ball can be seated on the ball seat.
The upper joint is buckled by 27/8' oil pipe UPTBG.
The baffle is a cross baffle.
The pressure balance spring is divided into a plurality of pressure balance grades according to the pressure of a wellhead in the sand washing process of the construction well, and the pressure balance grades at least comprise 0.5MPa, 1.0MPa and 1.5 MPa.
The outer diameter of the stop valve body is not more than 95mm, and the tensile strength of the stop valve body is matched with that of a tool oil pipe used on site.
The seat sealing ball is matched with the ball seat for use.
The cutting knife is arranged at the bottom of the ball seat.
The cutting knife is a cross cutting knife.
The baffle is connected in the stop valve body through threads.
The use method of the sand washing and liquid returning stop valve comprises the following steps:
in the process of pumping liquid for circulating sand washing, the liquid flow pushes the setting ball to leave the ball seat, and the sand washing liquid returning stop valve is in an open state, so that sand washing operation can be carried out;
when a single joint is replaced, the pumping of liquid is stopped, the setting ball falls on the ball seat under the action of the self weight and the elastic force of the pressure balance spring, the sand washing liquid return stop valve is in a closed state, and the wellhead stops returning water outwards;
when a positive circulation channel needs to be established, the sitting sealing ball can be broken by squeezing, and the sand flushing and liquid returning stop valve is opened to carry out positive and reverse circulation.
The utility model has the advantages that: the utility model provides a sand washing returns out liquid stop valve, including the top connection, the baffle, pressure balance spring, the stop valve body, the seat ball, the ball seat, upper portion oil pipe pin and lower part oil pipe box, upper portion oil pipe pin, the top connection, stop valve body and lower part oil pipe box connect gradually from the top down, the inside of stop valve body has set gradually the baffle from the top down, pressure balance spring, seat ball and ball seat, connect the upper portion that pressure balance spring and baffle and pressure balance spring all are located the stop valve body under the baffle, the ball seat links in the lower part of stop valve body, the seat ball can be seated on the ball seat. The sand washing liquid returning stop valve is designed by utilizing the pressure balance principle, and the using method is that in the process of pumping liquid for circulating sand washing, the liquid flow pushes the setting ball to leave the ball seat, and the sand washing liquid returning stop valve is in an open state, so that sand washing operation can be carried out; when a single joint is replaced, pumping of liquid is stopped, exciting pressure still exists in the liquid in a well (a gas cap also exists in partial conditions), the setting ball falls on the ball seat under the action of self weight and the elastic force of the pressure balance spring, the sand washing liquid return stop valve is in a closed state, the well mouth stops returning water outwards, and the liquid cannot float when the oil pipe coupling is at a height of 10 meters; when the engineering is complicated, and a positive circulation channel needs to be established, the sitting sealing ball can be crushed by extrusion, and the sand flushing and liquid returning stop valve is opened to carry out positive and reverse circulation. The sand washing liquid returning stop valve of the utility model not only can effectively block the overflow of the returned liquid in the sand washing operation and the replacement of a single liquid, solves the problems of environmental pollution and the like, but also meets the people-oriented working idea, improves the safety and environmental protection management level of the operation site, and can open the stop valve to carry out positive and reverse circulation by extruding and breaking the sitting and sealing ball when the engineering is complicated; therefore, the utility model discloses can effectively guide the site operation, improve ordinary oil pipe sand washing operating efficiency, reduce safe environmental protection risk.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a sand flushing and liquid returning stop valve.
Description of reference numerals: 1. an upper joint; 2. a baffle plate; 3. a pressure balance spring; 4. a stop valve body; 5. setting a ball; 6. a ball seat; 7. an upper oil pipe male buckle; 8. and the lower oil pipe is in female joint.
Detailed Description
Example 1:
the utility model provides a sand washing returns out liquid stop valve, including top connection 1, baffle 2, pressure balance spring 3, stop valve body 4, seat seal ball 5, the ball seat 6, upper portion oil pipe pin 7 and lower part oil pipe box 8, upper portion oil pipe pin 7, top connection 1, stop valve body 4 and lower part oil pipe box 8 connect gradually from the top down, stop valve body 4's inside has set gradually baffle 2 from the top down, pressure balance spring 3, seat seal ball 5 and ball seat 6, baffle 2 is connected pressure balance spring 3 down and baffle 2 and pressure balance spring 3 all are located the upper portion of stop valve body 4, ball seat 6 links in the lower part of stop valve body 4, seat seal ball 5 can sit and seal on ball seat 6.
Example 2:
as shown in figure 1, a sand washing liquid returning stop valve, including top connection 1, baffle 2, pressure balance spring 3, stop valve body 4, seat seal ball 5, the ball seat 6, upper portion oil pipe pin 7 and lower part oil pipe box 8, upper portion oil pipe pin 7, top connection 1, stop valve body 4 and lower part oil pipe box 8 connect gradually from the top down, stop valve body 4's inside has set gradually baffle 2 from the top down, pressure balance spring 3, seat seal ball 5 and ball seat 6, baffle 2 is connected pressure balance spring 3 down and baffle 2 and pressure balance spring 3 all are located the upper portion of stop valve body 4, ball seat 6 links in the lower part of stop valve body 4, seat seal ball 5 can be seated on ball seat 6. The sand washing liquid returning stop valve is designed by utilizing the pressure balance principle, the use method is that in the process of pumping liquid for circulating sand washing, the liquid flow pushes the setting ball 5 to leave the ball seat 6, and the sand washing liquid returning stop valve is in an open state, so that sand washing operation can be carried out; when a single joint is replaced, pumping of liquid is stopped, exciting pressure still exists in the liquid in a well (a gas cap also exists in partial conditions), the setting ball 5 falls on the ball seat 6 under the action of the self weight and the elastic force of the pressure balance spring 3, the sand washing and liquid returning stop valve is in a closed state, the well mouth stops returning water outwards, and the liquid cannot be splashed by the tubing coupling at the height of 10 meters; when the engineering is complicated, the sitting sealing ball 5 can be squeezed and broken when a positive circulation channel needs to be established, and the sand flushing and liquid returning stop valve is opened to carry out positive and reverse circulation. The sand washing liquid returning stop valve of the utility model not only can effectively block the overflow of the returned liquid in the sand washing operation and the replacement of a single liquid, solves the problems of environmental pollution and the like, but also meets the people-oriented working idea, improves the safety and environmental protection management level of the operation site, and can open the stop valve to carry out positive and reverse circulation by extruding and breaking the sitting and sealing ball when the engineering is complicated; therefore, the utility model discloses can effectively guide the site operation, improve ordinary oil pipe sand washing operating efficiency, reduce safe environmental protection risk.
The upper joint 1 adopts 27/8' oil pipe UPTBG buckle. The oil pipe can be directly connected with a common tool oil pipe on site for use, and has wide application range and strong operability.
The baffle 2 is a cross baffle. The cross baffle 2 is used for fixing the pressure balance spring 3, the pressure balance spring is connected with the cross baffle through a clamping point, the residual space except the cross framework is enough to meet the flow of liquid in the sand washing process of the oil well, the throttling effect of the pressure balance spring does not influence the sand washing effect, and the structure is simple and good in effect.
The pressure balance spring 3 is divided into a plurality of pressure balance grades according to the pressure of a wellhead in the sand washing process of the construction well, and the pressure balance grades at least comprise 0.5MPa, 1.0MPa and 1.5 MPa; because each well has different exciting pressures of liquid in the shaft and different well mouth return liquid pressures in the sand washing process, the selected pressure balance spring 3 is provided with a series according to the elastic force, and the optimization is carried out in the field use process, so that the applicability is strong.
The outer diameter of the stop valve body 4 is not more than 95mm, and the tensile strength is matched with a tool oil pipe used on site. The strength of the stop valve body 4 must meet the requirements of oil testing construction, such as tensile strength, internal pressure resistance, external extrusion resistance and the like. Small volume, stable structure and strong operability.
The setting ball 5 is matched with the ball seat 6 for use. The sitting and sealing ball is easy to break when the material selection mainly considers the sealing property and the poor pressure, thereby achieving the purpose of reestablishing the circulation channel; the requirements of different operations are met, the site construction can be effectively guided, the sand washing operation efficiency of the common oil pipe is improved, and the safety and environmental protection risks are reduced.
The utility model also comprises a cutting knife which is arranged at the bottom of the ball seat 6. The diameter of the seat ball is 40mm, the ball seat is matched with the seat ball, a cutting knife is designed on the premise of meeting sealing, and the seat ball can be broken under the condition of positive circulation pressure building to establish a positive circulation channel. The problems of environmental pollution and the like are solved, the people-oriented working idea is also met, and the safety and environmental protection management level of the operation site is improved.
The cutting knife is a cross cutting knife. A pair of cross-shaped cutters is arranged at the bottom of the ball seat and is used for cutting in the process of crushing the seat sealing ball, so that the crushed seat sealing ball is prevented from blocking a pipeline in subsequent operation; and the cross cutting knife has simple structure, is economical and practical, and reduces the production cost on the premise of not influencing the use effect.
The baffle 2 is connected in the stop valve body 4 through threads. The threaded connection is detachable, the structure is simple, and the operation is convenient.
Example 3:
on the basis of embodiment 2, the use method of the sand washing and liquid returning stop valve comprises the following steps:
in the process of pumping liquid for circulating sand washing, the liquid flow pushes the setting ball 5 to leave the ball seat 6, and the sand washing liquid returning stop valve is in an open state, so that sand washing operation can be carried out;
when a single joint is replaced, the pumping of liquid is stopped, the setting ball 5 falls on the ball seat 6 under the action of the self weight and the elastic force of the pressure balance spring 3, the sand washing liquid returning stop valve is in a closed state, and the wellhead stops returning water outwards;
when a positive circulation channel needs to be established, the sitting sealing ball 5 can be broken by squeezing, and the sand flushing and liquid returning stop valve is opened to carry out positive and reverse circulation.
The specific operation mode of the sand washing liquid returning stop valve is as follows:
1. tool connection mode: after the lower sand washing drilling tool actually detects that the sand surface is in place, the sand washing liquid returning stop valve is connected and installed on an oil pipe of the tool through an upper connector and connected with a single pipe, and the drilling and sand washing are continued;
2. selecting a sand washing and liquid returning stop valve: selecting a matched sand washing liquid returning stop valve according to the exciting pressure of liquid in the well, connecting the sand washing liquid returning stop valve to a tool oil pipe, carefully checking whether accessories are complete and intact before entering the well, uniformly and slowly lowering the pipe column for sand washing after the pump circulation is normal, and strictly controlling the pump pressure in a safety range in the sand washing process; after the sand washing liquid returning stop valve is installed, in the process of changing a single well, if liquid still returns from the well mouth, the sand washing liquid returning stop valve with larger elasticity can be replaced, if the liquid returns without reducing trend, whether overflow and blowout exist or not needs to be judged, and sand washing is continued after circulation is thorough.
3. And (3) abnormal condition processing: if sand is stuck, reverse circulation is not smooth, a drilling tool is difficult to move up and down, and a positive circulation channel needs to be established, the oil pipe can be gradually pressurized to break the seat ball, and the stop valve is removed after circulation is normal. If the sand washing is continued, the sand washing liquid return stop valve can be continuously installed, and the normal construction is realized.
The sand washing liquid returning stop valve of the utility model not only can effectively block the overflow of the returned liquid in the sand washing operation and the replacement of a single liquid, solves the problems of environmental pollution and the like, but also meets the people-oriented working idea, improves the safety and environmental protection management level of the operation site, and can open the stop valve to carry out positive and reverse circulation by extruding and breaking the sitting and sealing ball when the engineering is complicated; therefore, the utility model discloses can effectively guide the site operation, improve ordinary oil pipe sand washing operating efficiency, reduce safe environmental protection risk.
Example 4:
the utility model provides a sand washing returns out liquid stop valve, including top connection 1, baffle 2, pressure balance spring 3, stop valve body 4, seat seal ball 5, the ball seat 6, upper portion oil pipe pin 7 and lower part oil pipe box 8, upper portion oil pipe pin 7, top connection 1, stop valve body 4 and lower part oil pipe box 8 connect gradually from the top down, baffle 2 is connected pressure balance spring 3 down and baffle 2 and pressure balance spring 3 all are located the upper portion inboard of stop valve body 4, the inboard ball seat 6 of connecting in lower part of stop valve body 4, seat seal ball 5 is located between pressure balance spring 3 and the ball seat 6 and seat seal ball 5 is located stop valve body 4 middle part inboardly. The cutting tool also comprises a cross cutting tool which is arranged at the bottom of the ball seat 6. The upper joint 1 adopts 27/8' oil pipe UPTBG buckle. The stop valve body 4 is designed to have an outer diameter divided into two sections, the outer diameter of an upper coupling is phi 95mm, the minimum inner diameter is phi 73mm, the outer diameter of a lower portion is phi 73mm, and the minimum inner diameter is 35 mm. Wherein, phi 35mm is the diameter of the ball seat 6. The baffle 2 is a cross baffle. Baffle 2 diameter is 73mm, and thickness is 5mm, has the external screw thread, can directly install on the body. The setting ball 5 is matched with the ball seat 6 for use. The diameter of the setting ball 5 is 40 mm.
The utility model discloses a sand washing is returned out liquid stop valve not only can effectively the shutoff sand washing operation change single in-process and return out liquid excessive, solves polluted environment scheduling problem, has still satisfied people oriented work theory, has improved the safety ring protects the management level of operation scene. When the engineering is complicated, the sitting sealing ball can be broken by the bouncing pressure, and the stop valve is opened to carry out positive and reverse circulation. Therefore, the utility model discloses can effectively guide the site operation, improve ordinary oil pipe sand washing operating efficiency, reduce safe environmental protection risk.
In the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "inner", "lower", etc., it is based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (9)
1. The utility model provides a sand washing returns play liquid stop valve which characterized in that: the automatic sealing device comprises an upper joint (1), a baffle (2), a pressure balance spring (3), a stop valve body (4), a seat sealing ball (5), a ball seat (6), an upper oil pipe male buckle (7) and a lower oil pipe female buckle (8), the upper oil pipe male buckle (7), the upper joint (1), the stop valve body (4) and the lower oil pipe female buckle (8) are sequentially connected from top to bottom, the baffle (2) is sequentially arranged in the stop valve body (4) from top to bottom, the pressure balance spring (3), the seat sealing ball (5) and the ball seat (6), the baffle (2) is connected with the pressure balance spring (3) and the baffle (2) and the pressure balance spring (3) are both located on the upper portion of the stop valve body (4), the ball seat (6) is connected to the lower portion of the stop valve body (4), and the seat sealing ball (5) can be seated on the ball seat sealing.
2. The sand-flushing liquid-returning stop valve as claimed in claim 1, characterized in that: the upper joint (1) adopts 27/8' oil pipe UPTBG buckle.
3. The sand-flushing liquid-returning stop valve as claimed in claim 2, characterized in that: the baffle (2) is a cross baffle.
4. The sand-flushing liquid-returning stop valve as claimed in claim 3, characterized in that: the pressure balance spring (3) is divided into a plurality of pressure balance grades according to the pressure of a wellhead in the sand washing process of the construction well, and the pressure balance grades at least comprise 0.5MPa, 1.0MPa and 1.5 MPa.
5. The sand-flushing liquid-returning stop valve as claimed in claim 4, characterized in that: the outer diameter of the stop valve body (4) is not more than 95mm, and the tensile strength of the stop valve body is matched with that of a tool oil pipe used on site.
6. The sand-flushing liquid-returning stop valve as claimed in claim 5, characterized in that: the setting ball (5) is matched with the ball seat (6) for use.
7. The sand-flushing liquid-returning stop valve as claimed in claim 6, characterized in that: also comprises a cutting knife which is arranged at the bottom of the ball seat (6).
8. The sand-flushing liquid-returning stop valve as claimed in claim 7, characterized in that: the cutting knife is a cross cutting knife.
9. The sand-flushing liquid-returning stop valve as claimed in claim 8, characterized in that: the baffle (2) is connected in the stop valve body (4) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839797.9U CN211115870U (en) | 2019-10-30 | 2019-10-30 | Sand washing liquid returning stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921839797.9U CN211115870U (en) | 2019-10-30 | 2019-10-30 | Sand washing liquid returning stop valve |
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| Publication Number | Publication Date |
|---|---|
| CN211115870U true CN211115870U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921839797.9U Active CN211115870U (en) | 2019-10-30 | 2019-10-30 | Sand washing liquid returning stop valve |
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| Country | Link |
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| CN (1) | CN211115870U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671064A (en) * | 2019-10-30 | 2020-01-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil well sand washing liquid returning stop valve and using method thereof |
-
2019
- 2019-10-30 CN CN201921839797.9U patent/CN211115870U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671064A (en) * | 2019-10-30 | 2020-01-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil well sand washing liquid returning stop valve and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201109 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1203 Patentee before: CHANGQING DOWNHOLE TECHNOLOGY OPERATION COMPANY OF CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
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| TR01 | Transfer of patent right |