Well treatment tool and method of treating a well
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-021/00
E21B-037/06
E21B-043/00
출원번호
US-0369059
(2003-02-18)
발명자
/ 주소
Stone, Roger
대리인 / 주소
Hunn Melvin A.
인용정보
피인용 횟수 :
2인용 특허 :
7
초록▼
A well treatment tool is installed along the sucker rod string of a well, within the surrounding production tube string. The tool provides for the distribution of a treatment fluid (solvent, etc.) within the fluid being pumped or flowing from the well. The tool receives treatment fluid through the h
A well treatment tool is installed along the sucker rod string of a well, within the surrounding production tube string. The tool provides for the distribution of a treatment fluid (solvent, etc.) within the fluid being pumped or flowing from the well. The tool receives treatment fluid through the hollow sucker rod string, and distributes the fluid through a valve which is set at a predetermined pressure. When the treatment fluid pumped down the sucker rod string from the surface exceeds the predetermined opening pressure of the valve, the treatment fluid is distributed into the production tube string through one or more passages in the tool. The present tool may be used simultaneously with well production, with fluid (oil, etc.) rising up the production tube string, carrying the treatment fluid therewith. The treatment fluid is thus distributed throughout the local fluid processing system, including pipelines from the well, any initial treatment operations, and any storage tanks. The present tool is particularly well adapted for the treatment of paraffin buildups within the production tube string of an oil well. The present tool may be used with both pumping wells and flowing (e.g., artesian) wells.
대표청구항▼
1. A well treatment tool, comprising:(a) a housing for installing concentrically in line with a wellbore tubular string which is generally hollow disposed generally concentrically within a production tube string and for distributing well treatment fluid from the wellbore tubular string and into the
1. A well treatment tool, comprising:(a) a housing for installing concentrically in line with a wellbore tubular string which is generally hollow disposed generally concentrically within a production tube string and for distributing well treatment fluid from the wellbore tubular string and into the production tube string, with at least the portion of the wellbore tubular string disposed above said housing being hollow;(b) said housing including an upper end having an axial fluid entrance passage therein for accepting treatment fluid from the wellbore tubular portion disposed thereabove, and an opposite solid lower end;(c) said housing further including at least one treatment fluid distribution passage extending outwardly from said housing;(d) a valve disposed within said housing;(1) an elongated cavity located within said housing;(2) an elongated piston member carried at least in part in said cylindrical cavity;(3) a spring member for biasing said piston member outward of said elongated cavity;(4) a raised seat portion carried on said elongated piston member;(5) a valve seat located in said elongated cavity and adapted for sealing engagement with said raised seat portion;(6) wherein said spring member biases said raised seat portion engagement with said valve sent under a particular pressure condition, but which allows separation of said raised seat portion and said valve seat at another particular pressure condition;(e) an attachment member for coupling said housing to said wellbore tubular string. 2. The well treatment tool according to claim 1, wherein the production tube string has an internal diameter, and said housing has a maximum diameter smaller than the internal diameter of the production tube string to define a production fluid passage therebetween. 3. The well treatment tool according to claim 1, wherein said at least one treatment fluid distribution passage comprises a plurality of radially disposed passages extending from said housing. 4. A producing well having at least a production tube string and a wellbore tubular string which is generally hollow and disposed generally concentrically therein and, comprising in combination:(a) a well treatment tool having a housing for installing concentrically in line with said wellbore tubular string and for distributing well treatment fluid from said wellbore tubular string and into said production tube string, with said wellbore tubular string including at least a hollow portion disposed above said housing;(b) said housing of said well treatment tool including an upper end having an axial fluid entrance passage therein for accepting treatment fluid from said wellbore tubular portion disposed thereabove;(c) said housing of said well treatment tool further including at least one treatment fluid distribution passage extending outwardly from said housing of said well treatment tool;(d) a valve disposed within said housing of said well treatment tool, including:(1) an elongated cavity located within said housing;(2) an elongated piston member carried at least in part in said cylindrical cavity;(3) a spring member for biasing said piston member outward of said elongated cavity;(4) a raised seat portion carried on said elongated piston member;(5) a valve seat located in said elongated cavity and adapted for sealing engagement with said raised seat portion;(6) wherein said spring member biases said raised seat portion into engagement with said valve seat under a particular pressure condition, but which allows separation of said raised seat portion and said valve seat at another particular pressure condition. 5. The producing well and well treatment tool combination according to claim 4 wherein said production tube string has an internal diameter, and said housing of said well treatment tool has a maximum diameter smaller than said internal diameter of said production tube string to define a production fluid passage therebetween. 6. The producing well and well treatment tool combi nation according to claim 4, wherein said at least one treatment fluid distribution passage of said well treatment tool housing comprises a plurality of radially disposed passages extending from said outlet end of said valve, outwardly through said housing. 7. A method of treating a producing well having at least a production tube string with a hollow length of tubing disposed generally concentrically therein, with the production tube string having a production fluid flowing upwardly therethrough to an initial treatment and storage system, the method comprising the following steps:(a) providing a well treatment tool having a generally cylindrical body, an upper end having an axial fluid entrance passage therein for accepting well treatment fluid from said hollow length of tubing disposed thereabove, an opposite solid lower end, and at least one treatment fluid distribution passage extending outwardly from the body;(b) installing the tool concentrically in line with said hollow length of tubing at a predetermined depth in the well, with the fluid entrance passage communicating with the interior of said hollow length of tubing;(c) dispensing a well treatment fluid under pressure downwardly from the surface, through said hollow length of tubing to the well treatment tool;(d) distributing the well treatment fluid from the treatment fluid distribution passage of the well treatment tool, into the production tube string; and(e) flushing the well treatment fluid upwardly with the production fluid, through the production tube string and into the initial treatment and storage system;(f) providing a cylindrical piston member;(g) biasing said cylindrical piston member with a spring to engage a valve seat to prevent the egress of well treatment fluid until a particular pressure is exceeded. 8. The method of treating a producing well according to claim 7, including the steps of:(a) defining an internal diameter for the production tube string;(b) providing a maximum diameter for the body of the well treatment tool, less than the internal diameter of the production tube string; and(c) defining a production fluid passage between the internal diameter of the production tube string and the body of the well treatment tool. 9. The method of treating a producing well according to claim 7, including the step of providing a plurality of radially disposed treatment fluid distribution passages extending from said outlet end of the valve, outwardly through the body. 10. The method of treating a producing well according to claim 7, including the steps of:(a) providing oil with a paraffin component mixed therein as the production fluid; and(b) providing a paraffin solvent as the well treatment fluid. 11. A well treatment tool for use in a wellbore extending from a surface location, comprising:(a) a housing for installing concentrically in line with a wellbore tubular string which is generally hollow disposed generally concentrically within a production tube string and for distributing well treatment fluid from said wellbore tubular string and into the production tube string, with at least the portion of the wellbore tubular string disposed above said housing being hollow;(b) said housing including an upper end having an axial fluid entrance passage therein for accepting treatment fluid from the wellbore tubular portion disposed thereabove, and an opposite solid lower end;(c) said housing further including at least one treatment fluid distribution passage extending outwardly from said housing;(d) a valve disposed within said housing, including:(1) an elongated cavity located within said housing;(2) an elongated piston member carried at least in part in said elongated cavity;(3) a spring member for biasing said piston member outward of said elongated cavity;(4) a raised seat portion carried on said elongated piston member;(5) a valve seat located in said elongated cavity and adapted for sealing engagement with said raised seat portion;(6) wherein said sprin g member biases said raised seat portion into engagement with said seat under a particular pressure condition, but which allows separation of said raised seat portion and said valve seat at another particular pressure condition;(e) an attachment member for coupling said housing to said wellbore tubular string;(f) a pump located proximate said surface location for supplying a column of said wellbore treatment fluid to said wellbore tubular string;(g) wherein said particular pressure condition comprises a pressure level within said housing which is a predetermined amount which must be overcome by said pump in order to open said valve. 12. The well treatment tool according to claim 11, wherein the production tube string has an internal diameter, and said housing has a maximum diameter smaller than the internal diameter of the production tube string to define a production fluid passage therebetween. 13. The well treatment tool according to claim 11, wherein said at least one treatment fluid distribution passage comprises a plurality of radially disposed passages extending from said housing. 14. A producing well extending downward forma a surface location having at least a production tube string and a wellbore tubular string which is generally hollow and disposed generally concentrically therein and, comprising in combination:(a) a well treatment tool having a housing for installing concentrically in line with said wellbore tubular string and for distributing well treatment fluid from said wellbore tubular string and into said production tube string, with said wellbore tubular string including at least a hollow portion disposed above said housing;(b) said housing of said well treatment tool including an upper end having an axial fluid entrance passage therein for accepting treatment fluid from said wellbore tubular string hollow portion disposed thereabove;(c) said housing of said well treatment tool further including at least one treatment fluid distribution passage extending outwardly from said housing of said well treatment tool;(d) a valve disposed within said housing of said well treatment tool, including:(1) an elongated cavity located within said housing;(2) an elongated piston member carried at least in part in said cavity;(3) a spring member for biasing said piston member outward of said elongated cavity;(4) a raised seat portion carried on said elongated piston member;(5) a valve seat located in said elongated cavity and adapted for sealing engagement with said raised seat portion;(6) wherein said spring member biases said raised seat portion into engagement with said valve seat under a particular pressure condition, but which allows separation of said raised seat portion and said valve seat at another particular pressure condition;(e) a pump located proximate said surface location for supplying said well treatment fluid to said wellbore tubular string at a pressure sufficient to satisfy said particular pressure condition. 15. The producing well and well treatment tool combination according to claim 14, wherein said production tube string has an internal diameter, and said housing of said well treatment tool has a maximum diameter smaller than said internal diameter of said production tube string to define a production fluid passage therebetween. 16. The producing well and well treatment tool combination according to claim 14, wherein said at least one treatment fluid distribution passage of said well treatment tool housing comprises a plurality of radially disposed passages extending from said outlet end of said valve, outwardly through said housing. 17. A method of treating a producing well extending downward from a surface and having at least a production tube string with a hollow length of tubing disposed generally concentrically therein, with the production tube string having a production fluid flowing upwardly therethrough to an initial treatment and storage system, the method comprising the following steps:(a) prov iding a well treatment tool having a generally cylindrical body, an upper end having an axial fluid entrance passage therein for accepting well treatment fluid from said hollow length of tubing disposed thereabove, an opposite solid lower end, and at least one treatment fluid distribution passage extending outwardly from the body;(b) installing the tool concentrically in line with said hollow length of tubing at a predetermined depth in the well, with the fluid entrance passage communicating with the interior of said hollow length of tubing;(c) dispensing a well treatment fluid under pressure downwardly from the surface, through said hollow length of tubing to the well treatment tool;(d) distributing the well treatment fluid from the treatment fluid distribution passage of the well treatment tool, into the production tube string; and(e) flushing the well treatment fluid upwardly with the production fluid, through the production tube string and into the initial treatment and storage system;(f) providing a cylindrical piston member;(g) biasing said cylindrical piston member with a spring to engage a valve seat to prevent the egress of well treatment fluid until a particular pressure is exceeded;(h) providing a pump located proximate said surface location for supplying said well treatment fluid at a pressure sufficient to move said cylindrical piston member to an open condition to admit said well treatment fluid into said wellbore. 18. The method of treating a producing well according to claim 17, including the steps of:(a) defining an internal diameter for the production tube string;(b) providing a maximum diameter for the body of the well treatment tool, less than the internal diameter of the production tube string; and(c) defining a production fluid passage between the internal diameter of the production tube string and the body of the well treatment tool. 19. The method of treating a producing well according to claim 17, including the step of providing a plurality of radially disposed treatment fluid distribution passages extending from said outlet end of the valve, outwardly through the body. 20. The method of treating a producing well according to claim 17, including the steps of:(a) providing oil with a paraffin component mixed therein as the production fluid; and(b) providing a paraffin solvent as the well treatment fluid.
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이 특허에 인용된 특허 (7)
Schmitt Kenneth J. (Spring TX), Backflush filter system for downhole pumps.
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