CN211038567U - Combined type clamping wellhead structure - Google Patents
Combined type clamping wellhead structure Download PDFInfo
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- CN211038567U CN211038567U CN201921335031.7U CN201921335031U CN211038567U CN 211038567 U CN211038567 U CN 211038567U CN 201921335031 U CN201921335031 U CN 201921335031U CN 211038567 U CN211038567 U CN 211038567U
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Abstract
The application discloses a combined type clamping wellhead structure, which comprises an oil pipe head, a casing head, an oil pipe hanger, a polished rod sealer and a rotary flange; the oil pipe head is arranged above the casing head, and the oil pipe hanger is arranged in the casing head; the tubing head comprises an upper end part of the tubing head and a lower end part of the tubing head, the casing head comprises an upper end part of the casing head, and the tubing hanger comprises an upper end part of the tubing hanger and a lower end part of the tubing hanger; the upper end part of the oil pipe hanger is connected with the polish rod sealer through a rotary flange; the lower end part of the oil pipe hanger is connected with the upper end part of the oil pipe head through a locking mechanism; and the lower end part of the oil pipe head and the upper end part of the sleeve head are connected in a ball clamping mode. This combined type card fixed wellhead structure has simplified the wellhead structure through the optimal design, has saved the material, and the equipment is more convenient to realize high-speed joint, improve production efficiency.
Description
Technical Field
The utility model relates to a relevant equipment technical field of well head specifically is a combined type card well head structure.
Background
When the well head gets oil or coal bed gas, need be connected to the inside of well head with the oil pipe of steel pipe preparation, come on the water extraction of well head inside through external device to the size of rivers is controlled through pressure brake and water valve.
Present combined type card closes the well head and connects the concatenation through passing through bolt and flange with each part, and not unidimensional part can select not unidimensional flange to carry out coupling assembling when splicing, accomplishes the equipment to combined type card closes the well head.
Although the types and the number of the composite type clamping well heads on the market are very large, most of the composite type clamping well heads have the defects that the composite type clamping well heads are connected through flanges when being assembled and connected, sealing rings are easy to drop when the composite type clamping well heads are combined, the composite type clamping well heads are connected through the flanges, the occupied space is larger, the problem that a mandrel type production casing can not be hung to the designed depth can occur in the composite type clamping well heads, and therefore the existing composite type clamping well heads are improved.
Therefore, there is an urgent need in the art to develop a new composite type locking wellhead structure, which solves the above-mentioned disadvantages of the existing wellhead.
Disclosure of Invention
An object of the utility model is to provide a combined type card fixed well head structure to solve the combined type card fixed well head on the existing market that the above-mentioned background art provided and when carrying out the equipment connection, all connect through the flange, and the device is when making up, and the sealing washer drops easily, and uses flange joint, and the space that occupies is bigger, and the device can take place the problem that the core shaft type production casing pipe hangs and can not go into the design depth down moreover.
The utility model provides a combined type clamping wellhead structure, which comprises an oil pipe head, a casing head, an oil pipe hanger, a polished rod sealer and a rotary flange; the oil pipe head is arranged above the casing head, and the oil pipe hanger is arranged in the casing head;
the tubing head comprises an upper end part of the tubing head and a lower end part of the tubing head, the casing head comprises an upper end part of the casing head, and the tubing hanger comprises an upper end part of the tubing hanger and a lower end part of the tubing hanger;
the upper end part of the oil pipe hanger is connected with the polish rod sealer through a rotary flange;
the lower end part of the oil pipe hanger is connected with the upper end part of the oil pipe head through a locking mechanism;
the locking mechanism comprises a first step arranged at the lower end part of the oil pipe hanger, the first step is symmetrically milled to form a first angle, a first annular groove matched with the first step is formed in the inner circumference of the upper end part of the oil pipe head, the lower end face of the first annular groove is symmetrically milled to form a second angle, when the lower end part of the oil pipe hanger is connected with the upper end part of the oil pipe head, the remaining first step part of the lower end part of the oil pipe hanger corresponds to the lower end face of the milled first annular groove, and therefore when the oil pipe hanger rotates 90 degrees, the oil pipe hanger is locked in the oil pipe head;
and the lower end part of the oil pipe head and the upper end part of the sleeve head are connected in a ball clamping mode.
In another preferred example, a first angle formed by symmetrically milling off the first step is 95 °, and a second angle formed by symmetrically milling off the lower end surface of the first annular groove is 95 °.
In another preferred example, the combined type clamping wellhead further comprises a locking cover, and the locking cover is connected with the upper end part of the tubing head and the tubing hanger through nuts and used for preventing the tubing hanger from rotating.
In another preferred embodiment, the lower end part of the tubing head is inserted into the upper end part of the tubing head, the outer circular surface of the upper end part of the tubing head is connected with the inner circular surface of the lower end part of the tubing head in a sealing manner, the outer circular surface of the upper end part of the tubing head is provided with a second step, the lower end part of the tubing head comprises a lower end body, a socket screw, a connecting piece, a plurality of balls and a locking screw, the connecting piece is connected to the lower end of the lower end body of the tubing head, a first ring groove is arranged on the inner circular surface of the lower end body, which is connected with the connecting piece in a matching manner, a second ring groove is arranged on the outer circular surface of the connecting piece, which corresponds to the first ring groove, a threaded hole is arranged on the outer circular surface of the lower end body, which corresponds to the first ring groove, the plurality of balls are filled into a circular groove formed by the first ring groove and, the lower part of the connecting piece is connected with the second step at the upper end part of the sleeve head into a whole through a locking screw.
In another preferred example, the outer circular surface of the second step at the upper end part of the sleeve head is provided with a positioning counter bore, and the positioning counter bore is in fit connection with the locking screw.
In another preferred example, the inner periphery of the connecting piece is provided with a second annular groove which is arranged corresponding to the second step.
In another preferred embodiment, the second annular groove is provided with a countersunk threaded hole, and the locking screw is inserted into the countersunk threaded hole and the positioning counter bore on the second step when the lower end part of the tubing head and the upper end part of the casing head are axially mounted.
In another preferred embodiment, a limiting block is arranged in the second annular groove, and the limiting block is used for stopping rotation of the connecting piece when the locking screw is aligned with the positioning counter bore in the second step at the upper end part of the casing head.
In another preferred embodiment, the number of the second step, the number of the positioning counter bores, the number of the countersunk threaded holes and the number of the locking screws are two, and the two positioning counter bores are symmetrically arranged.
In another preferred embodiment, the outer circular surface of the upper end part of the casing head is provided with a sealing ring groove, a sealing ring is arranged in the sealing ring groove, the outer circular surface of the upper end part of the casing head is connected with the inner circular surface of the lower end part of the oil pipe head in a sealing manner through the sealing ring, and the second step is arranged above the sealing ring groove.
In another preferred example, the composite clamping structure further comprises an emergency slip hanger and an emergency sealing supplementary core.
In another preferred example, the oil pipe head upper interface is connected with an oil production tool through a ball snap.
Drawings
FIG. 1 is a general assembly view of the composite stuck wellhead configuration of the present application;
FIG. 2 is an enlarged partial view of the lower end of the tubing head and the upper end of the casing head of the present application;
FIG. 3 is a schematic cross-sectional view of the connection of the lower end of the tubing head to the upper end of the casing head of the present application;
FIG. 4 is a schematic view of the structure of the lower end of the tubing head of the present application;
FIG. 5 is a view from the direction A of FIG. 4;
FIG. 6 is a schematic view of the upper end structure of the casing head of the present application;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is an enlarged fragmentary view of the locking mechanism at the upper end of the tubing head of the present application.
In the drawings, the designations are as follows:
1-oil pipe head
11-upper end part of oil pipe head
12-lower end of tubing head
Lower end body of 121-oil pipe head
122-socket head screw
123-connecting piece
124-ball
125-locking screw
126-limiting block
2-casing head
21-upper end part of casing head
211-second step
212-seal ring groove
213-sealing ring
3-oil pipe hanger
321-first step
322-first annular groove
4-polish rod sealer
5-rotating flange
6-anti-loose cover
7-slip hanger
8-emergency sealing bushing
Detailed Description
The invention develops a combined type clamping wellhead structure for the first time through extensive and intensive research, in the structure, an oil pipe hanger is locked in an oil pipe head through a locking mechanism, the oil pipe head and a casing head are connected in a ball buckling mode, an upper interface of the oil pipe head is also connected with an oil extraction tool in a ball buckling mode, and the oil pipe hanger is connected with an upper end structure through a flange, so that the installation efficiency is improved, and the wellhead structure is simplified.
In the following description, numerous technical details are set forth in order to provide a better understanding of the present application. However, it will be understood by those skilled in the art that the technical solutions claimed in the present application may be implemented without these technical details and with various changes and modifications based on the following embodiments.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As used herein, "tubing head" and "tubing head body" are used interchangeably.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the combined type clamping wellhead structure comprises an oil pipe head 1, a casing head 2, an oil pipe hanger 3, a polished rod sealer 4, a rotary flange 5, a locking cover 6, an emergency slip hanger 7 and an emergency core 8.
The polish rod sealer 4 is arranged above the tubing head 1, the tubing head 1 is arranged above the casing head 2, and the tubing hanger 3 is arranged in the tubing head 1. The tubing head 1 comprises a tubing head upper end portion 11 and a tubing head lower end portion 12, and the tubing hanger 3 comprises a tubing hanger upper end portion 31 and a tubing hanger lower end portion 32.
(a) The upper end part 31 of the oil pipe hanger 3 is connected with the polish rod sealer 4 through the rotary flange 5, so that the function of a flange on an oil pipe head is achieved, and the well head structure is simplified; different with the overhead flange joint of traditional oil pipe (the overhead flange of traditional oil pipe is connected with the first body of oil pipe, and its effect is sealed oil pipe head body upper end pressure, sealed oil pipe hanger, reconnection polished rod sealer), in this embodiment, the effect that the overhead flange of oil pipe on the traditional oil pipe head has been acted as to rotatory flange 5 on the oil pipe hanger has saved the material. Compare with traditional oil pipe head structure: the oil pipe head has the advantages of saving parts such as flanges, bolts, nuts, sealing steel rings and the like on the oil pipe head, saving materials compared with the traditional structure, along with convenient installation/disassembly/maintenance, labor saving and the like.
(b) The tubing head upper end portion 11 is connected with the tubing hanger lower end portion 32 by a locking mechanism
Referring to fig. 7, the locking mechanism comprises a first step 321 arranged on the outer circumferential surface of the lower end portion 32 of the tubing hanger, wherein the first step 321 is milled out 95 degrees symmetrically, a first annular groove 322 matched and connected with the first step 321 is arranged on the inner circumference of the upper end portion 11 of the tubing head, the lower end surface of the first annular groove 322 is milled out 95 degrees symmetrically, when the tubing hanger 3 is connected with the upper end portion 11 of the tubing head, the first step 321 of the tubing hanger 3 is inserted into the first annular groove 322 of the upper end portion of the tubing head, exactly, the rest of the first step 321 of the tubing hanger 3 is corresponding to the milled-out part of the lower end surface of the first annular groove 322 of the upper end portion 11 of the tubing head, after the tubing hanger 3 is axially installed in place, and then the tubing hanger 3 is rotated 90 degrees, so that the tubing hanger and the tubing head can be locked together, and accordingly, the locking mechanism connection only needs to be rotated 90 degrees, the tubing hanger 3 can be taken out, the traditional method of locking the tubing hanger by using jackscrews is replaced, and the operation is simple and convenient.
In other words, the principle of the locking mechanism is similar to the design principle of fig. 3 to 6, that is, the annular groove is designed on the tubing head body, and a part is machined away. A raised circular ring is designed on the outer circle of the oil pipe hanger, then a part of the raised circular ring is machined off, when the oil pipe hanger is installed, the part of the raised circular ring left on the oil pipe hanger corresponds to the machined part of the designed annular groove of the oil pipe head body, the oil pipe hanger is installed in the oil pipe head body, and the oil pipe hanger and the oil pipe head can be locked together by rotating the oil pipe hanger for 90 degrees without fixing of jackscrews/bolts and the like. And the link of fluid leakage is reduced. (in practice, the tubing hanger is also the tubing head body)
In this embodiment, the locking cap 6 is connected to the tubing head upper end portion 11 by a nut and is clamped on the outer circumferential surface of the tubing head upper end portion 11, and the locking cap 6 is also connected to the tubing hanger 3 by a nut, and the locking cap 6 functions to prevent the tubing hanger from rotating and disengaging from the tubing head body engaging portion (disengaging when rotating 90 °) due to impact and vibration of well fluid, that is, to prevent the locking mechanism from rotating, and to protect foreign matter such as dust from entering.
(c) The lower end part 12 of the tubing head 1 is connected to the upper end part 21 of the casing head using a ball snap connection
As shown in fig. 2 to 6, the lower end part (12) of the tubing head is connected with the upper end part (21) of the casing head in a ball snap-fit manner, the lower end part (12) of the tubing head is inserted on the upper end part (21) of the casing head, and the outer circular surface of the upper end part (21) of the casing head is connected with the inner circular surface of the lower end part (12) of the tubing head in a sealing manner;
the outer circular surface of the upper end part 21 of the casing head is provided with a second step 211, the lower end part 12 of the oil pipe head comprises a lower end body 121, a socket head screw 122, a connecting piece 123, a plurality of balls 124 and a locking screw 125, the lower end part 12 of the oil pipe head 1 is connected with the upper end part 21 of the casing head through the connecting piece 123, the connecting piece 123 is connected with the lower end of the lower end body 121 of the oil pipe head, the inner circular surface of the lower end body 121 of the oil pipe head, which is matched and connected with the connecting piece 123, is provided with a first ring groove with a hemispherical section, a second ring groove with a hemispherical section is arranged at a position corresponding to the second ring groove on the outer circular surface of the lower end body 121 of the oil pipe head, a threaded hole is arranged at a position corresponding to the first ring groove, after the lower end body 121 of the oil pipe head 1 and the connecting piece 123 are axially assembled in place, the balls 124 are filled into a circular, thereby realizing the connection between the lower end body 121 of the tubing head and the connecting piece 123 and being capable of freely and smoothly rotating around the axis; in the embodiment, the number of the socket head screws is 2, and the number of the balls is several. The lower portion of the connection member 123 is integrally mounted with the second step 211 of the upper end portion 21 of the casing head by means of the locking screw 125. Preferably, there are two locking screws 125.
The second step 211 of the upper end part 21 of the casing head is symmetrically milled off by 95 degrees, two symmetrical positioning counter bores are arranged on the outer circular surface of the rest second step and are matched and connected with the locking screw 125, a second annular groove matched and connected with the second step 211 is arranged on the inner periphery of the connecting piece 123, 95 degrees are symmetrically milled off on the lower end surface of the second annular groove, two countersunk threaded holes are symmetrically designed in the center of the second annular groove, the locking screw 125 is also arranged in the countersunk threaded hole, and the connecting piece 123 and the second step 211 are integrally installed through the countersunk threaded hole and the locking screw 125; preferably, the number of the second steps 211, the number of the positioning counter bores and the number of the countersunk threaded holes are two, and the two positioning counter bores are symmetrically arranged. A stop 126 is provided in the second annular groove of the lower end portion 12 of the tubing head, the stop 126 serving to stop rotation of the lower end portion 12 of the tubing head 1 when the locking screw 125 is aligned with the locating counterbore in the upper end portion 21 of the casing head.
The outer circular surface of the upper end part 21 of the casing head is provided with a sealing ring groove 212, the sealing ring groove 212 is arranged above the second step 211, a sealing ring 213 is arranged in the sealing ring groove 212, and the outer circular surface of the upper end part 21 of the casing head is connected with the inner circular surface of the lower end part 12 of the oil pipe head 1 in a sealing way through the sealing ring 213.
When the lower end part 12 of the oil pipe head 1 is connected with the upper end part 21 of the sleeve head, an upper sealing ring is arranged in a sealing groove of the upper end part 21 of the sleeve head, the direction of the locking screw arranged on the lower end part 12 of the oil pipe head 1 corresponds to the part of the upper end part 21 of the sleeve head, wherein the second step 211 is milled off, the lower end part 12 of the oil pipe head 1 is inserted onto the upper end part 21 of the sleeve head, after the lower end part 12 of the oil pipe head 1 and the upper end part 21 of the sleeve head are axially arranged in place, two hands grasp the two locking screws to enable the connecting piece to rotate 90 degrees, when the locking screws are adjusted to be opposite to the positioning counter bores of the upper end part 21 of the sleeve head, the locking screws are screwed, and the upper end part 21 of the sleeve head and the. After the lower end portion 12 of the tubing head 1 rotates 90 degrees, the limiting block 126 can stop the rotation of the lower end portion 12 of the tubing head 1, and is also convenient for centering the locking screw with the positioning counter bore on the upper end portion 21 of the casing head, and is convenient for installation.
In this embodiment, the ball snap-fit of the lower end of the tubing head and the upper end of the casing head may also be used when the upper end 11 of the tubing head 1 is connected to a production tool (not shown). The production tool is connected to the upper end portion of the tubing head only when producing oil and is therefore not shown in the drawings of the present application.
In this embodiment, emergency slip hanger 7 and emergency patch 8 are provided within casing head 2 for addressing emergency situations where mandrel production casing hangers cannot be run to design depth.
The utility model has the main advantages that:
(a) the upper end of the oil pipe hanger is connected with the upper end structure thereof through the rotary flange, so that the structure of a well head is simplified, and materials are saved;
(b) the oil pipe hanger is connected with the oil pipe head through the locking mechanism, the oil pipe hanger can be taken out only by rotating 90 degrees, the traditional jackscrew locking is replaced, and the operation is simple and convenient;
(c) the lower end part of the oil pipe head and the lower end part of the casing head are connected in a ball clamping mode to replace the traditional flange, so that the oil pipe head and the casing head are connected and sealed quickly, and the mounting efficiency is improved;
(d) when the upper end of the tubing head is connected with an oil extraction tool (not shown), a ball fastening mode is adopted, so that the oil extraction tool can be conveniently and quickly detached;
(e) this application combined type card fixing well head structure still includes emergent slips hanger and urgent bushing, solves the mandrel formula production sleeve pipe and hangs the emergency that can not go into design depth down.
All documents mentioned in this application are to be considered as being incorporated in their entirety into the disclosure of this application so as to be subject to modification as necessary. Further, it is understood that various changes or modifications may be made to the present application by those skilled in the art after reading the above disclosure of the present application, and such equivalents are also within the scope of the present application as claimed.
Claims (10)
1. A combined type clamping wellhead structure is characterized by comprising an oil pipe head (1), a casing head (2), an oil pipe hanger (3), a polished rod sealer (4) and a rotary flange (5); the oil pipe head (1) is arranged above the casing head (2), and the oil pipe hanger (3) is arranged in the casing head (2);
the oil pipe head (1) comprises an upper end part (11) and a lower end part (12), the casing head (2) comprises an upper end part (21), and the oil pipe hanger (3) comprises an upper end part and a lower end part;
the upper end part of the oil pipe hanger is connected with the polish rod sealer (4) through a rotary flange (5);
the lower end part of the oil pipe hanger is connected with the upper end part (11) of the oil pipe head through a locking mechanism;
the locking mechanism comprises a first step (321) arranged at the lower end part of the oil pipe hanger, the first step is symmetrically milled to form a first angle, a first annular groove (322) matched with the first step (321) is formed in the inner periphery of the upper end part of the oil pipe head, the lower end face of the first annular groove (322) is symmetrically milled to form a second angle, and when the lower end part of the oil pipe hanger is connected with the upper end part of the oil pipe head, the rest first step (321) part of the lower end part of the oil pipe hanger corresponds to the lower end face of the milled first annular groove (322), so that the oil pipe hanger is locked in the oil pipe head when the oil pipe hanger rotates 90 degrees;
and the lower end part of the oil pipe head and the upper end part of the sleeve head are connected in a ball clamping mode.
2. The composite type clamping wellhead structure according to claim 1, wherein the first step (321) is symmetrically milled at a first angle of 95 ° and the lower end surface of the first annular groove (322) is symmetrically milled at a second angle of 95 °.
3. The composite type anchoring wellhead structure according to claim 1, characterized in that it further comprises a locking cap (6), said locking cap (6) being connected with the upper end portion of the tubing head (1) and the tubing hanger (3) by nuts for preventing the tubing hanger (3) from rotating.
4. The composite type clamping wellhead structure according to claim 1, wherein the lower end part of the tubing head is inserted into the upper end part of the tubing head, the outer circular surface of the upper end part of the tubing head is connected with the inner circular surface of the lower end part of the tubing head in a sealing manner, the outer circular surface of the upper end part of the tubing head is provided with a second step (211), the lower end part (12) of the tubing head comprises a lower end body (121), a socket head screw (122), a connecting piece (123), a plurality of balls (124) and locking screws (125), the connecting piece (123) is connected to the lower end of the lower end body (121), the inner circular surface of the lower end body (121) which is connected with the connecting piece (123) in a matching manner is provided with a first annular groove, a second annular groove is arranged at a position on the outer circular surface of the connecting piece (123) corresponding to the first annular groove, and a threaded hole is arranged at a position on, the ball bearings (124) are poured into a circular groove formed by the first annular groove and the second annular groove through threaded holes, the concave head screw (122) is used for plugging the threaded holes, the lower end body (121) of the oil pipe head and the connecting piece (123) rotate around the axis through the ball bearings, and the lower portion of the connecting piece (123) is connected with the second step (211) of the upper end portion (21) of the sleeve head into a whole through the locking screw (125).
5. The composite type clamping wellhead structure according to claim 4, characterized in that the outer circular surface of the second step (211) of the casing head upper end part (21) is provided with a positioning counter bore, and the positioning counter bore is connected with the locking screw (125) in a matching manner.
6. The composite type clamping wellhead structure according to claim 5, wherein a second annular groove corresponding to the second step (211) is formed on the inner periphery of the connecting piece (123).
7. The composite type clamping wellhead structure according to claim 6 wherein a stop block (126) is provided in the second annular groove, the stop block (126) being adapted to stop the rotation of the connection member (123) when the locking screw (125) is aligned with the positioning counter bore in the second step (211) of the upper end portion (21) of the casing head.
8. The composite type clamping wellhead structure according to claim 7, characterized in that the outer circular surface of the casing head upper end part (21) is provided with a sealing ring groove (212), a sealing ring (213) is arranged in the sealing ring groove (212), the outer circular surface of the casing head upper end part (21) is connected with the inner circular surface of the oil pipe head lower end part (12) in a sealing manner through the sealing ring (213), and the second step (211) is arranged above the sealing ring groove (212).
9. The composite type card wellhead structure according to claim 1 further comprising an emergency slip hanger (7) and an emergency seal patch core (8).
10. The composite type clamping wellhead structure according to claim 1, wherein the upper connector of the tubing head is connected with an oil production tool in a ball snap-fit manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921335031.7U CN211038567U (en) | 2019-08-16 | 2019-08-16 | Combined type clamping wellhead structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921335031.7U CN211038567U (en) | 2019-08-16 | 2019-08-16 | Combined type clamping wellhead structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211038567U true CN211038567U (en) | 2020-07-17 |
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ID=71536242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921335031.7U Active CN211038567U (en) | 2019-08-16 | 2019-08-16 | Combined type clamping wellhead structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211038567U (en) |
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2019
- 2019-08-16 CN CN201921335031.7U patent/CN211038567U/en active Active
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