CN209339862U - A kind of oil pipe thread connection structure - Google Patents
A kind of oil pipe thread connection structure Download PDFInfo
- Publication number
- CN209339862U CN209339862U CN201822059657.1U CN201822059657U CN209339862U CN 209339862 U CN209339862 U CN 209339862U CN 201822059657 U CN201822059657 U CN 201822059657U CN 209339862 U CN209339862 U CN 209339862U
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- tube body
- thread
- connector
- face
- oil pipe
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
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Abstract
The utility model discloses a kind of oil pipe thread connection structures, including connector and tube body, the connector both ends are equipped with the inclined trapezoidal internal thread of modified, the connector center position is equipped with a torque resistant step, torque resistant step two sides are respectively formed the sealing surface being in contact with the tube body end face, and the sealing surface is double sealing structure；The tube body is equipped with the partially trapezoidal external screw thread of modified, and end face matches with the sealing surface；After the tube body is connect with the connector tight thread, the inboard wall of tube body is concordant with the torque resistant step.The utility model has good sealing effect, and can improve screw thread anti-galling ability to avoid vortex or less generation vortex is generated, reduce API regular screw threads because being threadedly coupled the probability that failure causes the accident, meet the completion practice requirement of Oil Field.
Description
Technical field
The utility model relates to a kind of screw connection structure, especially a kind of oil pipe thread connection structure.
Background technique
API screw thread is one of the common screw thread in petroleum system.Although API screw thread processing cost is low, simple process,
There are poor sealing performance, tensile strength is poor, is easy to happen the problems such as thread gluing failure, causes the presence of limitation in actual use.
Utility model content
In view of the above-mentioned problems, a kind of oil pipe thread connection structure of the utility model, performance is threadedly coupled better than API, together
When overcome the shortcomings that API is threadedly coupled, and in case of emergency, can be directly connected to API screw thread without influencing to use
Performance.
A kind of oil pipe thread connection structure, including connector and tube body, it is partially trapezoidal interior that the connector both ends are equipped with modified
Screw thread, the connector center position are equipped with a torque resistant step, and torque resistant step two sides are respectively formed one and the pipe
The sealing surface that body end face is in contact, the sealing surface are double sealing structure, are made of primary sealing area and secondary sealing area, institute
Primary sealing area and horizontal line are stated in 20 ° of angles, the secondary sealing area and the primary sealing area are in 95 ° of angles, and vertical
Line is in 15 ° of angles；The tube body is equipped with the partially trapezoidal external screw thread of modified, and end face matches with the sealing surface；The tube body
After connecting with the connector tight thread, the inboard wall of tube body is concordant with the torque resistant step.
Further, modified buttress thread use 2 7/8 ", 8 teeth/inch, 3 1/2 " -4 1/2 ", 6 teeth/inch,
5 " -7 3/4 ", 5 teeth/inch, 8 5/8 " one of above, 4 teeth/inches.
Further, the tube body to end face narrow, the tube body main body inner wall to end face be a smooth transition region.
Further, the guide surface thread form angle of buttress thread is 10 °, and loading end thread form angle is -3 °.
Further, there are certain intervals between the connector both ends and the tube body.
The utility model has the beneficial effects that 1. torsional properties are strong, torque has been shared in tube body end face, to improve connector
Torsional property；2. under the premise of meeting torsional strenght requirement, and can control torque and excessive circumferential stress do not occur；3. using
Double sealing structure, suitable angular compliance reliably ensure that the compactness of tube body end and junction contacts, reach sealing effect
Fruit, gas sealing ability are significantly larger than common API nipple, and the high-inclination horizontal well for meeting special wellbore, directional well are to oil jacket
The bonding strength and seal request of tubing string；3. reducing the possibility that the box cupling that axial thread connection generates is radially expanded deformation；4. changing
Screw thread anti-galling ability is improved into type buttress thread, reduces API regular screw threads and causes the accident because being threadedly coupled failure
Probability, meet the completion practice requirement of Oil Field.
Detailed description of the invention
Fig. 1 is the schematic diagram of oil pipe thread connection structure.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.The utility model
Embodiment is given for the purpose of illustration and description, and be not be limited to exhaustively or by the utility model it is disclosed
Form.Many modifications and variations are obvious for the ordinary skill in the art.Selection and description are implemented
Example be in order to more preferably illustrate the principles of the present invention and practical application, and make those skilled in the art it will be appreciated that
The utility model is to design various embodiments suitable for specific applications with various modifications.
Embodiment 1
A kind of oil pipe thread connection structure, as shown in Figure 1, including connector 1 and tube body 2,1 both ends of connector, which are equipped with, to be changed
Into the inclined trapezoidal internal thread of type, the connector center position is equipped with a torque resistant step 3, the equal shape in 3 two sides of torque resistant step
The sealing surface being in contact at one with the tube body end face, the sealing surface is double sealing structure, by 4 He of primary sealing area
Secondary sealing area 5 forms, and the primary sealing area 4 and horizontal line are in 20 ° of angles, the secondary sealing area 5 and described first close
Cover 4 is in 95 ° of angles, is in 15 ° of angles with vertical line；The tube body 2 be equipped with the partially trapezoidal external screw thread of modified, end face with it is described
Sealing surface matches；After the tube body 2 is connect with 1 tight thread of connector, 2 inner wall of tube body and the torque resistant platform
Rank 3 is concordant.The guide surface thread form angle of buttress thread is 10 °, and loading end thread form angle is 3 °.
Modified buttress thread uses following form:
2 7/8 ", 8 teeth/inch, screw pitch 3.175mm/25.4mm；
3 1/2 " -4 1/2 ", 6 teeth/inch, screw pitch 4.22mm/25.4mm；
5 " -7 3/4 ", 5 teeth/inch, screw pitch 5.08mm/25.4mm；
8 5/8 " above, 4 teeth/inch, screw pitch 6.35mm/25.4mm；
The tube body 2 is narrowed to end face, 2 main body inner wall of tube body to end face be a smooth transition region 6, i.e. tube body
Pipe thickness overstriking setting, the tube body of overstriking and smooth transition region can further increase tube body to the pressure of sealing surface, improve
Leakproofness.
The setting of torque resistant step has several advantages that 1. torsional properties are strong, and torque has been shared in tube body end face, thus
Improve the torsional property of connector；2. under the premise of meeting torsional strenght requirement, and can control torque and excessive week do not occur
To stress；3. using double sealing structure, suitable angular compliance reliably ensure that the close of tube body end and junction contacts
Property, reaches sealing effect, and gas sealing ability is significantly larger than common API nipple, meet special wellbore high-inclination horizontal well,
Bonding strength and seal request of the directional well to oil casing；3. reducing the box cupling that axial thread connection generates is radially expanded deformation
Possibility；4. modified buttress thread improves screw thread anti-galling ability, reduces API regular screw threads and lost because being threadedly coupled
The probability to cause the accident is imitated, the completion practice requirement of Oil Field is met.
The inboard wall of tube body is concordant with the torque resistant step to be made to avoid vortex or less generation vortex, reduction is generated
The turbulent flow generated with medium in the process, while downhole tool being facilitated to pass through, especially suitable for horizontal well, it is desirable that not high gas well
Equal environment.
There are certain intervals 7 between 1 both ends of connector and the tube body 2, and gap 7 has guiding role, in tube body 2
When being connect with connector 1, convenient for drawing button, prevents in actual operation, do not draw button correctly and cause thread alternating, while being caused after avoiding thread alternating
Screw thread damage.
Obviously, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.
Based on the embodiments of the present invention, this field and those of ordinary skill in the related art are not making creative work
Under the premise of every other embodiment obtained, all should belong to the utility model protection range.
Claims (5)
1. a kind of oil pipe thread connection structure, including connector and tube body, it is characterised in that: the connector both ends are equipped with modified
Inclined trapezoidal internal thread, the connector center position are equipped with a torque resistant step, and torque resistant step two sides are respectively formed one
The sealing surface being in contact with the tube body end face, the sealing surface are double sealing structure, are sealed by primary sealing area and second
Face composition, the primary sealing area and horizontal line are in 20 ° of angles, the secondary sealing area and the primary sealing area in 95 ° of folders
Angle is in 15 ° of angles with vertical line；
The tube body is equipped with the partially trapezoidal external screw thread of modified, and end face matches with the sealing surface；The tube body connects with described
After head tight thread connection, the inboard wall of tube body is concordant with the torque resistant step.
2. oil pipe thread connection structure according to claim 1, it is characterised in that: modified buttress thread uses 2
7/8 ", 8 teeth/inch, 3 1/2 " -4 1/2 ", 6 teeth/inch, 5 " -7 3/4 ", 5 teeth/inch, 8 5/8 " above, 4 teeth/inch
One of.
3. oil pipe thread connection structure according to claim 2, it is characterised in that: the tube body is narrowed to end face, institute
State tube body main body inner wall to end face be a smooth transition region.
4. oil pipe thread connection structure according to claim 2, it is characterised in that: the guiding of modified buttress thread
Face thread form angle is 10 °, and loading end thread form angle is -3 °.
5. oil pipe thread connection structure according to any one of claims 1-4, it is characterised in that: the connector both ends
There are certain intervals between the tube body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822059657.1U CN209339862U (en) | 2018-12-10 | 2018-12-10 | A kind of oil pipe thread connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822059657.1U CN209339862U (en) | 2018-12-10 | 2018-12-10 | A kind of oil pipe thread connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209339862U true CN209339862U (en) | 2019-09-03 |
Family
ID=67756200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822059657.1U Active CN209339862U (en) | 2018-12-10 | 2018-12-10 | A kind of oil pipe thread connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209339862U (en) |
-
2018
- 2018-12-10 CN CN201822059657.1U patent/CN209339862U/en active Active
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