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CN-122014693-A - Operation method for converting self-injection into pumping of offshore oil and gas well production pipe column

CN122014693ACN 122014693 ACN122014693 ACN 122014693ACN-122014693-A

Abstract

The invention discloses an operation method for converting self-injection into pumping of an offshore oil and gas well production pipe column, which relates to the technical field of oil and gas well extraction equipment, and comprises a pump core and a self-sealing pump barrel, wherein the self-sealing pump barrel comprises an upper outer barrel, two self-sealing pieces, a locking ring, a middle pump barrel, an overflow pump barrel, a lower pump barrel, an anchoring pawl barrel, a lower self-sealing outer barrel, a ball seat, an overflow retainer ring and a steel ball; the self-sealing piece is limited by the lock ring, the lower self-sealing outer cylinder is matched with the conical surface of the anchoring pawl cylinder, the underground pressing can synchronously realize sealing and anchoring, the pump core can be installed in a throwing mode, the original self-spraying pipe column is not required to be lifted out, the operation is convenient, the sealing and anchoring are reliable, and the self-spraying and pumping operation of the offshore oil and gas well is adapted.

Inventors

  • WANG SHANZHENG
  • LI XINGHUI

Assignees

  • 东营新程石油科技有限责任公司

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. The novel jet pump comprises a pump core (A) and a self-sealing pump barrel (B), and is characterized in that the self-sealing pump barrel comprises an upper pump barrel outer barrel (1), two self-sealing pieces (2), a locking ring (3), a middle pump barrel (5), an overflow pump barrel (6), a lower pump barrel (7), an anchoring pawl barrel (8), a lower self-sealing outer barrel (9), a ball seat (10), an overflow retainer ring (17) and a steel ball (18), wherein the upper pump barrel outer barrel (1), the middle pump barrel (5), the overflow pump barrel (6) and the lower pump barrel (7) are sequentially connected from top to bottom; the two self-sealing parts (2) are respectively provided with elastic sealing bowls which are respectively sleeved on the outer side of the upper outer cylinder (1) of the pump cylinder and the outer side of the lower pump cylinder (7) and are limited and fixed through a locking ring (3); The lower self-sealing outer cylinder (9) is sleeved outside the self-sealing piece (2) at the outer side of the lower pump cylinder (7), and the upper end of the lower self-sealing outer cylinder (9) is matched with the anchoring pawl cylinder (8) by adopting a conical surface so as to axially push the anchoring pawl cylinder (8) to realize radial expansion anchoring; The ball seat (10) is connected to the lower end of the lower pump barrel (7), the steel ball (18) is arranged in the ball seat (10), and the overflow retainer ring (17) is connected with the ball seat (10) and limits the steel ball (18); when the lower self-sealing outer cylinder (9) is used for underground pressing, the lower self-sealing outer cylinder and the self-sealing piece (2) relatively move to expand an elastic sealing bowl outwards to realize sealing, and the upper pushing anchoring pawl cylinder (8) is opened to finish anchoring.
  2. 2. The novel jet pump according to claim 1, wherein an upper self-sealing outer cylinder (4) is sleeved outside the self-sealing piece (2) on the outer side of the upper outer cylinder (1) of the pump cylinder, and a limiting step (41) is arranged on the inner wall of the upper self-sealing outer cylinder (4).
  3. 3. The novel jet pump according to claim 1, wherein the self-sealing piece (2) is of a horn-shaped structure, and a security groove (21) and an upper lock ring security groove (22) are formed in the inner wall of the self-sealing piece.
  4. 4. The novel jet pump as claimed in claim 1, characterized in that the locking ring (3) is of C-shaped broken ring structure.
  5. 5. The novel jet pump of claim 1, wherein the upper outer cylinder (1) of the pump cylinder is of a stepped cylindrical structure, a release joint sealing surface (11), a connecting thread (12) and a pump core limiting step (13) are sequentially machined on the inner wall of the upper outer cylinder from top to bottom, and an upper self-sealing limiting step (14), an upper lock ring security groove (15) and at least one first pressure transmission hole (16) are sequentially machined on the outer wall of the upper outer cylinder from top to bottom.
  6. 6. The novel jet pump according to claim 1, wherein the upper end of the lower pump barrel (7) is provided with a limiting step (71), and the outer wall is provided with a lower pump barrel limiting step (72), a pin security groove (73), a second pressure transmission hole (74) and a lower lock ring security groove (75).
  7. 7. The novel jet pump according to claim 1, wherein the upper end of the lower self-sealing outer cylinder (9) is provided with a conical surface (91), and the inner wall is provided with a limiting step (92).
  8. 8. The novel jet pump as claimed in claim 1, characterized in that the upper part of the anchoring pawl cylinder (8) is an annular seat body (81), the inner wall is provided with an inner conical surface (82), the lower part is provided with a pawl (83), and the tail end of the pawl (83) is provided with a step (84) with anchoring teeth.
  9. 9. The novel jet pump according to claim 1, wherein the inner wall of the ball seat (10) is provided with a steel ball sealing conical surface (101).
  10. 10. A method of operation from self-injection to pumping of a production string of an offshore oil and gas well based on a novel jet pump according to any one of claims 1 to 9, comprising: Punching holes at preset positions of an original self-injection production pipe column to form through holes; the novel jet pump is hung at the through hole in a sitting manner, so that the upper and lower self-sealing of the self-sealing pump cylinder of the novel jet pump seals the through hole of the original self-spraying production pipe column; And putting a standard jet pump core of a preset model into a wellhead, and pumping the standard jet pump core into the self-sealing pump barrel which is well sealed underground.

Description

Operation method for converting self-injection into pumping of offshore oil and gas well production pipe column Technical Field The invention belongs to the technical field of artificial lifting in oil and gas field development technology, in particular to the technical field of jet pumps, and particularly relates to an operation method for converting self-injection into pumping of an offshore oil and gas well production string. Background The offshore oil gas development is limited by the geographical position, the number of the same construction wells, the construction area and other factors due to the ocean platform, so that the development cost is high, and the requirements on the operation construction procedure, the safety and the period of the pipe column are high. Along with the extension of the development period, the stratum energy of some oil and gas wells in offshore oil fields is gradually attenuated, the oil and gas wells are gradually changed from self-injection to pumping, and the replacement of oil production columns becomes an unavoidable measure step in the development process, but the implementation procedure links of the replacement of pumps on the current ocean platform are the same as those on land, the underground original self-injection columns are all required to be taken out, and then pumping columns are put into the pumping columns, so that all tools connected on the original self-injection columns are replaced, the cost of the tools is higher, meanwhile, the working procedure is applied to the ocean platform, the problem of the increase of the daily cost of the platform caused by the long construction period is also particularly remarkable, the original self-injection columns can be omitted, and only runner holes are drilled on the original self-injection columns, and then the original self-injection columns are directly put into the jet pumps for production, so that the cost of tool strings on the original self-injection columns is saved, the construction period of the original self-injection columns is greatly shortened, and huge operation and construction cost is saved. Offshore oil gas development is limited by the geographic position of the ocean platform, the number of construction wells and the area, the development cost is high, and the convenience of operation procedures, the safety of a pipe column and the construction period are more required. Along with the extension of the development period, part of the energy of the stratum of the offshore oil and gas well is attenuated, and the oil extraction mode is changed from self-injection to pumping, so that the oil extraction production pipe column needs to be replaced. The existing pump replacement process is consistent with the land, the original self-injection pipe column is required to be lifted out and then the pumping pipe column is lowered, the scrapping of an original pipe column tool is caused, the cost is increased, the construction period is long, and the daily cost of the ocean platform is greatly improved. If the original self-injection pipe column is not required to be lifted, only the runner hole is formed on the self-injection pipe column and the self-injection pipe column is directly put into the jet pump for production, the cost can be obviously saved, the period is shortened, but no jet pump exists at present. In summary, the structural design of the existing jet pump is not considered at all, so that the jet pump can adapt to the quick pump replacement operation of the offshore oil well, and the working period is saved. Therefore, it is urgent to develop a novel jet pump capable of rapidly operating to shorten the working period of the self-blowing pump of the offshore oil well. Disclosure of Invention The invention mainly aims to provide an operation method for converting a production string of an offshore oil and gas well from self-injection into pumping, which is suitable for rapid pump replacement operation of the offshore oil well and saves the operation period. In order to achieve the above object, the present invention provides a novel jet pump comprising: the self-sealing pump cylinder comprises an upper outer cylinder of the pump cylinder, two self-sealing pieces, a locking ring, a middle pump cylinder, an overflow pump cylinder, a lower pump cylinder, an anchoring pawl cylinder, a lower self-sealing outer cylinder, a ball seat, an overflow retainer ring and a steel ball, wherein the upper outer cylinder of the pump cylinder, the middle pump cylinder, the overflow pump cylinder and the lower pump cylinder are sequentially connected from top to bottom; the two self-sealing parts are respectively provided with an elastic sealing bowl, are respectively sleeved on the outer side of the upper outer cylinder of the pump cylinder and the outer side of the lower pump cylinder, and are fixed through locking ring limiting; the lower self-sealing outer cylinder is sleeved outside the self-sealing piece at