CN114198044A

CN114198044A - Oil field oil extraction wellhead sealing protection method and device

Info

Publication number: CN114198044A
Application number: CN202111413028.4A
Authority: CN
Inventors: 王立兵; 王子明; 苏友; 韩立志; 沈宗建
Original assignee: Yancheng Baixin Petroleum Machinery Co ltd
Current assignee: Yancheng Baixin Petroleum Machinery Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-18

Abstract

The invention discloses a method and a device for sealing and protecting an oil production wellhead in an oil field. The open fairways and the concealed fairways are arranged symmetrically inside, and they are connected end to end respectively to form an annular closed channel, so that a plurality of the rigid balls can be cyclically rolled along the corresponding fairways. At this time, the open fairways are The outer side of the rigid ball in the ballway is in contact with the inner side of the oil pipe and can roll, and because the contact area between the rigid ball and the oil pipe is small, the friction force is small, and it is not easy to wear, thus avoiding the fixing The direct contact between the frame and the oil pipe, through the rotating a plurality of the rigid balls as the connection medium between the oil pipe and the fixed frame, overcomes the friction between the oil pipe and the centralizer to the greatest extent.

Description

Oil field oil extraction wellhead sealing protection method and device

Technical Field

The invention relates to the field of oil exploitation devices, in particular to a method and a device for protecting the sealing of an oil extraction wellhead of an oil field.

Background

The oil is buried in the oil gas layer of tens of meters to several kilometers in the underground, need establish an oil gas passageway between ground and underground oil gas layer, and this passageway is exactly the well, need use sealing device at the oil recovery well head, seals the junction of oil recovery well head and oil recovery equipment, avoids taking place oil or natural gas leakage at the exploitation in-process, and sealing device commonly used now is the packing box for seal oil pipe seals with polish rod annular space's well head.

The existing oil extraction wellhead sealing device uses the centralizer to centralize when the polished rod is inserted, and the incomplete sealing caused by the deflection of the polished rod when the polished rod is inserted is reduced.

The centralizer of present traditional sucker rod is right to the rigidity member, and adopts the mode installation that agrees with during the installation, in the use, is difficult to avoid the centralizer in the friction of object around to wearing and tearing appear in the motion process, make the centralizer after long-time use right the effect poor.

Disclosure of Invention

The invention aims to provide a method and a device for protecting the sealing of an oil extraction wellhead in an oil field, and aims to solve the technical problems that a centralizer in the prior art has large friction in the movement process and has poor centralizing effect after being used for a long time.

In order to achieve the purpose, the oil field oil extraction wellhead sealing protection device adopted by the invention comprises a traction rope, a fixing frame, a rigid ball and an oil pipe, wherein the fixing frame is sleeved with the traction rope and is positioned on the outer side of the traction rope, and the rigid ball is connected with the fixing frame in a sliding manner and is positioned in the fixing frame;

the mount has open lane and hidden lane, the quantity of open lane is a plurality of, and with the haulage rope distributes as the center in the outside of mount, and link up the outside of mount, still orientation the extension direction of haulage rope extends, hidden lane with open lane link up, and be located the inside of mount is close to the haulage rope, and the orientation the haulage rope extension direction extends, the quantity of rigidity ball is a plurality of, and arrange respectively in the inside of open lane, and arrange respectively in the inside of hidden lane, oil pipe with rigidity ball sliding connection, and be located the surface of rigidity ball, and be located the outside of mount.

The number of the fixing frames is two, the fixing frames are detachably connected with each other and are respectively located on two sides of the traction rope.

The invention also comprises a sealing protection method of the oil extraction well mouth of the oil field, which adopts the sealing protection device of the oil extraction well mouth of the oil field and comprises the following steps,

the connecting screw rods respectively penetrate into the two fixing frames and are respectively in threaded connection with the two fixing frames;

open ball tracks and hidden ball tracks which are symmetrically distributed are arranged in each fixing frame;

the traction rope passes through the center of the fixing frame and is fixed;

respectively installing a plurality of rigid balls into the open type ball path and the hidden type ball path to enable the arc-shaped surfaces of the rigid balls to protrude out of the fixing frame and to be in contact with the oil pipe;

the fixing frame is driven to move, and the rigid ball rolls in the open type ball path and the hidden type ball path.

Wherein, in the step of arranging symmetrically distributed open type ball tracks and hidden type ball tracks in the fixing frame, the method also comprises the following steps,

the open ball way and the hidden ball way are connected end to form an annular closed channel.

Wherein in the step of respectively installing a plurality of rigid balls into the open type ball path and the hidden type ball path to enable the arc-shaped surfaces of the rigid balls to protrude out of the fixed frame to be contacted with the oil pipe, the method also comprises the steps of,

selecting rigid balls respectively matched with the inner diameters of the open type ball path and the hidden type ball path;

an opening is arranged on the side surface of the open lane;

the rigid ball is loaded into the open type ball path and the hidden type ball path, and the side surface of the rigid ball protrudes out of the opening of the open type ball path and is contacted with the oil pipe.

Wherein in the process that the connecting screw rods respectively penetrate into the two fixed frames and are respectively in threaded connection with the two fixed frames, the method also comprises the following steps,

approaching the opposite planes of the two fixing frames;

a connecting screw rod horizontally penetrates through the right side fixing frame and is rotatably arranged on the left side fixing frame through a bearing;

and an adjusting bolt is arranged on the outer side of the right end of the connecting screw rod, and the adjusting bolt is rotated to be abutted against the right side fixing frame.

The invention relates to a sealing protection method and a device for an oil extraction well mouth of an oil field, wherein a traction rope penetrates through the middle of a fixed frame, the traction rope is fixed and slides with the fixed frame at the same time, the open type ball path and the hidden type ball path which are symmetrically distributed are arranged in the fixed frame, and are respectively connected end to form a closed channel, so that a plurality of rigid balls can circularly roll along the corresponding ball paths, the outer side surface of the rigid ball in the open ball path is contacted with the inner side surface of the oil pipe and can roll, and because the contact area between the rigid ball and the oil pipe is small, the friction force is small, the abrasion is not easy to occur, and the direct contact between the fixed frame and the oil pipe is further avoided, and the friction between the oil pipe and the centralizer is overcome to the maximum extent by taking the plurality of rotating rigid balls as connecting media of the oil pipe and the fixed frame.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the oil field production wellhead seal protection device of the invention.

FIG. 2 is a flow chart of the method for protecting the seal of the oil recovery wellhead in the oil field

FIG. 3 is a flow chart of the present invention for installing a plurality of rigid balls in an open lane and a hidden lane, respectively, such that the arc-shaped surfaces of the rigid balls protrude from the fixed frame and contact with the oil pipe.

FIG. 4 is a flow chart showing that the connecting screw rods of the present invention are respectively inserted into two fixing frames and are respectively in threaded connection with the two fixing frames.

In the figure: the method comprises the steps of 1-hauling rope, 2-fixing frame, 3-rigid ball, 4-oil pipe, 5-connecting screw, 21-open type ball path, 22-hidden type ball path and 100-oil field oil extraction well mouth sealing protection method and device.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1, the present invention provides an oil field oil extraction wellhead sealing protection device 100, which includes a pulling rope 1, a fixing frame 2, a rigid ball 3 and an oil pipe 4, wherein the fixing frame 2 is sleeved with the pulling rope 1 and is located at the outer side of the pulling rope 1, and the rigid ball 3 is slidably connected with the fixing frame 2 and is located inside the fixing frame 2; mount 2 has open lane 21 and hidden lane 22, the quantity of open lane 21 is a plurality of, and with haulage rope 1 distributes as the center in the outside of mount 2, and link up the outside of mount 2 still moves towards the extending direction of haulage rope 1 extends, hidden lane 22 with open lane 21 link up, and lie in the inside of mount 2 is close to haulage rope 1, and moves towards the 1 extending direction of haulage rope extends, the quantity of rigidity ball 3 is a plurality of, and arrange respectively in the inside of open lane 21, and arrange respectively in the inside of hidden lane 22, oil pipe 4 with rigidity ball 3 sliding connection, and lie in the surface of rigidity ball 3, and lie in the outside of mount 2.

In this embodiment, the traction rope 1 passes through the middle of the fixing frame 2, is fixed to the traction rope 1, and slides simultaneously with the fixing frame 2, the fixing frame 2 is internally provided with the open lane 21 and the hidden lane 22 which are symmetrically distributed, and are respectively connected end to form an annular closed channel, the diameter of the rigid ball 3 is the same as the width of the channel, so that the rigid ball 3 slides in the channel, the open lane 21 has an opening, the width of the opening is smaller than the diameter of the rigid ball 3, so that the arc-shaped surface of the rigid ball 3 protrudes out of the fixing frame 2 and is in contact with the oil pipe 4, so that the rigid balls 3 are uniformly distributed in the open lane 21 and the hidden lane 22 and roll in the lane, at this time, the outer side surface of the rigid ball 3 in the open lane 21 is in contact with the inner side surface of the oil pipe 4 and can roll, and enter the hidden ball way 22, and push the rigid ball 3 in the hidden ball way 22 to the open ball way 21, so as to circulate, and because the contact area between the rigid ball 3 and the oil pipe 4 is small, the friction force is small, and the rigid ball is not easy to wear, thereby avoiding the direct contact between the fixing frame 2 and the oil pipe 4, and the friction between the oil pipe 4 and the centralizer is overcome to the maximum extent by using a plurality of rotating rigid balls 3 as the connecting medium between the oil pipe 4 and the fixing frame 2.

Further, the number of the fixing frames 2 is two, and the two fixing frames 2 are detachably connected with each other and are respectively located on two sides of the traction rope 1.

In this embodiment, the cross section of mount 2 is semi-circular to centre of a circle position has a semicircular hole, two the complete circular of mount 2 synthesis to central point puts and has the confession the circular hole that haulage rope 1 passes through makes haulage rope 1 is located two between the mount 2, so to haulage rope 1's centre gripping effect is better, makes mount 2 with contact between the oil pipe 4 is more even, reduces friction.

Further, referring to fig. 1, the method and apparatus 100 for protecting the seal of the oil extraction wellhead in the oil field further includes a connecting screw 5, wherein the connecting screw 5 is rotatably connected to the fixing frame 2, is connected to the two fixing frames 2, is located inside the fixing frame 2, and further penetrates through the fixing frame 2.

In this embodiment, connecting screw 5 with 2 threaded connection of mount to run through a mount 2, two perpendicular to the face that mount 2 is connected stretches into another in the mount 2, and through connecting screw 5's rotation drives two mount 2 to haulage rope 1 is close to, makes mount 2 is right haulage rope 1's fixed effect is better, prevents mount 2 with take place the displacement between the haulage rope 1, produce sliding friction, influence the righting effect of centralizer.

Further, the number of the connecting screws 5 is plural, and the connecting screws are respectively rotatably connected with the two fixing frames 2 and respectively rotate by taking parallel straight lines as central axes.

In this embodiment, the quantity of screw rod is a plurality of to respectively the parallel stretch into the inside of mount 2, through two the multiple point of mount 2 is fixed, and then makes mount 2 is to the fixed effect of haulage rope 1 is better, prevents mount 2 with take place the displacement between the haulage rope 1, produce sliding friction, influence the righting effect of centralizer.

Referring to fig. 2 to 4, a method for protecting a seal of an oil recovery wellhead in an oil field, which uses the oil recovery wellhead seal protection device, includes the following steps,

s501: the connecting screw rods respectively penetrate into the two fixing frames and are respectively in threaded connection with the two fixing frames;

s5011: approaching the opposite planes of the two fixing frames;

s5012: a connecting screw rod horizontally penetrates through the right side fixing frame and is rotatably arranged on the left side fixing frame through a bearing;

s5013: an adjusting bolt is arranged on the outer side of the right end of the connecting screw rod, and the adjusting bolt is rotated to be abutted against the right side fixing frame;

s502: an open type ball way and a hidden type ball way which are symmetrically distributed are arranged in each fixing frame, and the open type ball way and the hidden type ball way are connected end to form an annular closed channel;

s503: the traction rope passes through the center of the fixing frame and is fixed;

s504: respectively installing a plurality of rigid balls into the open type ball path and the hidden type ball path to enable the arc-shaped surfaces of the rigid balls to protrude out of the fixing frame and to be in contact with the oil pipe;

s5041: selecting rigid balls respectively matched with the inner diameters of the open type ball path and the hidden type ball path;

s5042: an opening is arranged on the side surface of the open lane;

s5043: the rigid ball is arranged in the open type ball path and the hidden type ball path, and the side surface of the rigid ball protrudes out of the opening of the open type ball path and is contacted with the oil pipe;

s505: the fixing frame is driven to move, and the rigid ball rolls in the open type ball path and the hidden type ball path.

In this embodiment, the cross section of the fixing frame 2 is semicircular, and the fixing frame 2 can be matched into a circle, the linear ends of the two fixing frames 2 are arranged in opposite directions and are connected with the two fixing frames 2 through the connecting screw 5 transversely penetrating through the two fixing frames 2, the left end of the connecting screw 5 penetrates through the fixing frame 2 on the right side and then extends into a bearing in the fixing frame 2 on the left side to be matched, the thread of the connecting screw 5 is matched with the internal thread of the fixing frame 2 on the right side, so that the folding and the separation of the two fixing frames 2 on the left side and the right side are realized by rotating the adjusting bolt positioned at the right end of the connecting screw 5; the traction rope 1 penetrates through the middle of the fixing frame 2, is fixed to the traction rope 1 and slides simultaneously with the fixing frame 2, the open type ball path 21 and the hidden type ball path 22 which are symmetrically distributed are arranged in the fixing frame 2 and are respectively connected end to form an annular closed channel, the diameter of the rigid ball 3 is the same as the width of the channel, so that the rigid ball 3 slides in the channel, the open type ball path 21 is provided with an opening, the width of the opening is smaller than the diameter of the rigid ball 3, the arc-shaped surface of the rigid ball 3 protrudes out of the fixing frame 2 and is in contact with the oil pipe 4, a plurality of rigid balls 3 are uniformly distributed in the open type ball path 21 and the hidden type ball path 22 and roll in the ball path, at the moment, the outer side surface of the rigid ball 3 positioned in the open type ball path 21 is in contact with the inner side surface of the oil pipe 4 and can roll, and enter the hidden ball way 22, and push the rigid ball 3 in the hidden ball way 22 to the open ball way 21, so as to circulate, and because the contact area between the rigid ball 3 and the oil pipe 4 is small, the friction force is small, and the rigid ball is not easy to wear, thereby avoiding the direct contact between the fixing frame 2 and the oil pipe 4, and the friction between the oil pipe 4 and the centralizer is overcome to the maximum extent by using a plurality of rotating rigid balls 3 as the connecting medium between the oil pipe 4 and the fixing frame 2.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. an oil field oil production wellhead sealing protection device, is characterized in that, comprises traction rope, fixing frame, rigid ball and oil pipe,

the fixing frame is sleeved with the traction rope and is located on the outside of the traction rope; the rigid ball is slidably connected with the fixing frame and is located inside the fixing frame;

The fixing frame has an open fairway and a concealed fairway, the number of the open fairways is multiple, and is distributed on the outer side of the fixing frame with the traction rope as the center, and passes through the outer side of the fixing frame, It also extends toward the extension direction of the traction rope, and the concealed fairway passes through the open fairway, is located inside the fixing frame, close to the traction rope, and extends toward the extension direction of the traction rope , the number of the rigid balls is multiple, and they are respectively arranged inside the open fairway and inside the concealed fairway. The oil pipe is slidably connected to the rigid ball and is located in the the surface of the rigid ball and the outer side of the fixing frame.

2. The oilfield oil production wellhead sealing protection device as claimed in claim 1, characterized in that,

The number of the fixing frames is two, the two fixing frames are detachably connected to each other, and are respectively located on both sides of the traction rope.

3. an oilfield oil production wellhead sealing protection method, adopts the oilfield oil production wellhead sealing protection device as claimed in claim 1, is characterized in that, comprises the steps,

The connecting screws penetrate into the two fixing frames respectively, and are respectively connected with the two fixing frames by screw thread;

Symmetrically distributed open fairways and concealed fairways are arranged inside each fixed frame;

Pass the traction rope through the center of the fixing frame and fix the traction rope;

Install a plurality of rigid balls into the open fairway and the concealed fairway respectively, so that the curved surface of the rigid balls protrudes from the fixing frame and contacts the oil pipe;

Drive the fixed frame to move, and the rigid ball rolls in open fairways and concealed fairways.

4. The oilfield production wellhead sealing protection method as claimed in claim 3, characterized in that, in "setting symmetrically distributed open fairways and concealed fairways in the interior of the fixing frame", the method further comprises:

The open fairways and the concealed fairways are connected end to end to form an annular closed channel.

5. The oilfield oil production wellhead sealing protection method as claimed in claim 3, characterized in that, in "installing a plurality of rigid balls in the open fairway and the concealed fairway respectively, so that the arc surface of the rigid balls protrudes from the fixing frame. , in contact with the oil pipe", the method further comprises,

Select rigid balls that fit the inner diameter of the open fairway and the concealed fairway, respectively;

Provide openings on the sides of open fairways;

The rigid ball is installed in the open fairway and the concealed fairway, and the side of the rigid ball protrudes from the opening of the open fairway and contacts the oil pipe.

6. The oilfield production wellhead sealing protection method as claimed in claim 3, characterized in that, in "the connecting screws penetrate into the two fixing frames respectively, and are respectively threadedly connected with the two fixing frames", the method further comprises: ,

Bring the planes facing each other of the two fixing brackets close to each other;

Take a connecting screw horizontally through the right fixing frame, and install it on the left fixing frame through the bearing;

Install the adjustment bolt on the outside of the right end of the connecting screw, and rotate the adjustment bolt to contact the right fixing frame.