CN216341959U

CN216341959U - Centralizer for petroleum drilling

Info

Publication number: CN216341959U
Application number: CN202122738006.7U
Authority: CN
Inventors: 丁景勇
Original assignee: Jiyuan Tianhe Special Steel Forging Co ltd
Current assignee: Jiyuan Tianhe Special Steel Forging Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-04-19
Anticipated expiration: 2031-11-09

Abstract

The utility model relates to a centralizer for oil drilling, comprising: a drill stem; set up in the stabilizing mean of drilling rod, stabilizing mean includes: the drill rod comprises a plurality of sleeves sleeved on the drill rod, a spiral arranged on the sleeves and hard alloy embedded in the spiral protruding parts; and, locate the sleeve is used for locking or the locking sleeve's adjustment mechanism of unblock, adjustment mechanism includes: the locking device comprises a fixing frame, a thread through hole, a locking pad and a sealing component, wherein the fixing frame is annularly arranged at one end of a sleeve, the thread through hole is formed in the outer side of the fixing frame, the locking pad is movably assembled on the fixing frame and can be tightly abutted to the rotating rod, and the sealing component is arranged between the adjacent sleeves and used for protecting the fixing frame. Through the arrangement, the centralizer has the advantages that the position of the centralizer on the drill rod can be adjusted, and the length of the centralizer can be adjusted to control the precision.

Description

Centralizer for petroleum drilling

Technical Field

The utility model relates to the technical field of auxiliary tools for petroleum drilling, in particular to a centralizer for petroleum drilling.

Background

In the exploration and development of oil and gas fields, a technical casing is a string of high-strength steel pipes which are arranged before a high-pressure oil and gas layer is drilled, after annulus is sealed by cement, a borehole can be reinforced, internal pressure is borne, collapsed strata and a high-pressure water layer are isolated, different pressure layer systems are separated so as to establish normal drilling fluid circulation, meanwhile, reliable guarantee is provided for installation, blowout prevention, leakage prevention and tail pipe suspension of well control equipment, the oil layer casing also has a protection effect, a good foundation is laid for subsequent drilling and pilot production operation, a rotating drill rod and the inner wall of the technical casing repeatedly and continuously rub in a spiral track in the drilling construction process in the technical casing, so that not only is a drill rod joint quickly ground and scrapped, but also a plurality of technical casings in wells are directly ground and worn, the technical casing and well control facilities lose functions, once oil and gas in the high-pressure layer are blown out, a more serious disaster than wellhead runaway will occur; in addition, the drill rod is easy to deviate when oil-production casing cementing operation is carried out, and the drilled well deviates when operation is caused, so that the working efficiency is influenced, and therefore the centralizer is required for centralization. Traditional centralizer is fixed setting, can not adjust the position of centralizer to can not adjust righting precision.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides the centralizer for the oil drilling and production, which has the advantages that the position of the centralizer can be adjusted, and the length of the centralizer can be adjusted to control the precision.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a centralizer for oil drilling applications, comprising:

a drill stem;

set up in the stabilizing mean of drilling rod, stabilizing mean includes: the drill rod comprises a plurality of sleeves sleeved on the drill rod, a spiral arranged on the sleeves and hard alloy embedded in the spiral protruding parts; and the number of the first and second groups,

locate the sleeve is used for locking or the locking sleeve's of unblock adjustment mechanism, adjustment mechanism includes: the locking device comprises a fixing frame, a thread through hole, a movable assembly, a locking pad and a sealing assembly, wherein the fixing frame is annularly arranged at one end of a sleeve, the thread through hole is formed in the outer side of the fixing frame, the movable assembly is arranged in the fixing frame, the locking pad can be tightly abutted to the rotating rod, the thread is connected to the thread through hole, the locking bolt is connected to the locking pad, and the sealing assembly is arranged between the adjacent sleeves and used for protecting the fixing frame.

Realize above-mentioned technical scheme, at first establish a sleeve pipe cover on the drilling rod, the spiral can avoid leaving the hole between the sleeve and the wall of a well, avoid forming the piston, make the drilling rod more smooth and easy, carbide on the spiral can increase the wearability of spiral, then screw up the locking bolt, the locking bolt promotes the locking pad at the internal motion of screw thread through-hole, and support the locking pad tightly on the drilling rod, thereby with the sleeve lock solid on the drilling rod, then arrange all the other sleeves in proper order and lock on the drilling rod, make adjacent sleeve form sealedly through the seal assembly simultaneously, avoid mud to get into, increase the wholeness of centralizer, thereby increase life and reliability, assemble a plurality of sleeve according to the drilling needs, reach the mesh of the centralizer length of regulation, thereby can control the drilling precision of drilling rod.

As a preferable aspect of the present invention, the closure assembly includes: the annular is seted up in the draw-in groove that the sleeve is close to mount one end, set up in one side that the mount was kept away from to the sleeve and can the cladding in the sealing section of thick bamboo of mount and set up in the tip of sealing section of thick bamboo and can the joint in the bulge loop of draw-in groove.

According to the technical scheme, the convex rings are inserted into the clamping grooves, so that the sealing barrels form a closed space between the adjacent sleeves, and the fixing frame is wrapped in the closed space, so that the fixing frame is not invaded by mud in a drilling well.

As a preferred scheme of the utility model, the end of the locking bolt is connected with one side of a bearing gasket, the other side of the bearing gasket is connected with a locking pad, the fixing frame is provided with a through hole for the locking pad to move, and the bearing gasket is positioned in the fixing frame and has a size larger than the through hole.

According to the technical scheme, the connecting reliability of the locking bolt and the locking pad is improved through the arranged bearing gasket, the locking bolt is prevented from being screwed up, holes are drilled in the locking pad, and meanwhile the locking pad can be prevented from falling off the fixing frame.

As a preferable scheme of the present invention, the locking bolt is a hexagon socket head cap screw, and a head of the locking bolt is located in the threaded through hole.

According to the technical scheme, the locking bolt is prevented from protruding out of the fixing frame, and the sealing barrel and the clamping groove are prevented from being closed.

As a preferable scheme of the utility model, the fixing frame is provided with a sealing ring which is tightly attached to the drill rod.

Realize above-mentioned technical scheme, further form sealedly between mount and drilling rod, increased the seal of locking pad for drilling rod and locking pad are more clean, thereby avoid the locking pad to increase the locking force because mud skids.

In a preferred embodiment of the present invention, the material of the sealing cylinder is stainless steel.

By adopting the technical scheme, the durability of the sealing cylinder in the underground wet environment is improved.

As a preferable aspect of the present invention, the number of the sleeves is three.

According to the technical scheme, the three sleeves are sequentially arranged up and down to form the whole centralizer, the sleeve at one end of the centralizer is provided with the fixed frame, and the sleeve at the other end of the centralizer is provided with the sealing barrel.

In conclusion, the utility model has the following beneficial effects:

the utility model provides the centralizer for the petroleum drilling, the sleeve is sleeved on the drill rod, the position of the sleeve can be adjusted according to the requirement, the screw can avoid a gap between the sleeve and the well wall and a piston from being formed, so that the drill rod is smoother, the hard alloy on the screw can increase the wear resistance of the screw, then the locking bolt is screwed up, the locking bolt moves inwards in the threaded through hole to push the locking pad and abuts against the drill rod, so that the sleeve is locked on the drill rod, then the rest sleeves are sequentially arranged on the drill rod to be locked, and the adjacent sleeves are sealed by the sealing component, thereby avoiding the entering of slurry, increasing the integrity of the centralizer, further prolonging the service life and improving the reliability, a plurality of sleeves are assembled according to drilling and production requirements, the purpose of adjusting the length of the centralizer is achieved, and therefore drilling and production accuracy of the drill rod can be controlled.

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 present invention.

FIG. 2 is an enlarged view of the utility model at A in FIG. 1.

The corresponding part names indicated by the numbers and letters in the drawings:

1. a drill stem; 2. a sleeve; 3. spiraling; 4. hard alloy; 5. a fixed mount; 6. a threaded through hole; 7. locking the bolt; 8. a force bearing gasket; 9. a locking pad; 10. a seal ring; 11. a sealing cylinder; 12. a convex ring; 13. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 to 2, a centralizer for oil drilling and production includes: a drill rod 1; a stabilizing mechanism arranged on the drill rod 1; and an adjusting mechanism provided to the sleeve 2 for locking or unlocking the sleeve 2.

Specifically, the stabilizing mechanism includes: the drill rod comprises a plurality of sleeves 2 sleeved on the drill rod 1, a spiral 3 arranged on the sleeves 2 and hard alloy 4 embedded in the protruding part of the spiral 3; the adjustment mechanism includes: the locking device comprises a fixing frame 5 arranged at one end of a sleeve 2 in an annular mode, a threaded through hole 6 arranged on the outer side of the fixing frame 5, a locking pad 9 movably assembled on the fixing frame 5 and capable of abutting against a rotating rod, a locking bolt 7 in threaded connection with the threaded through hole 6 and connected to the locking pad 9, and a sealing assembly arranged between the adjacent sleeves 2 and used for protecting the fixing frame 5.

Wherein, the closure assembly includes: the annular is seted up in the sleeve 2 and is close to draw-in groove 13 of mount 5 one end, set up in the sleeve 2 keep away from one side of mount 5 and can cladding in the section of thick bamboo 11 that seals of mount 5, and set up in the tip of a section of thick bamboo 11 and can joint in the bulge loop 12 of draw-in groove 13, peg graft bulge loop 12 in draw-in groove 13, make a section of thick bamboo 11 form airtight space between adjacent sleeve 2, and with the cladding of mount 5 in airtight space, make mount 5 not invaded by the mud in the drilling.

Furthermore, the end of the locking bolt 7 is connected with one side of a bearing gasket 8, the other side of the bearing gasket 8 is connected with a locking pad 9, the fixing frame 5 is provided with a through hole for the locking pad 9 to move, the bearing gasket 8 is positioned in the fixing frame 5 and has a size larger than that of the through hole, the reliability of connection between the locking bolt 7 and the locking pad 9 is improved through the arranged bearing gasket 8, the locking bolt 7 is prevented from drilling on the locking pad 9 when the locking bolt 7 is screwed down, meanwhile, the locking pad 9 can be prevented from falling off the fixing frame 5, the locking bolt 7 is a hexagon socket head bolt, the head of the locking bolt 7 is positioned in the threaded through hole 6, the locking bolt 7 is prevented from protruding out of the fixing frame 5 to shield the closing of the sealing cylinder 11 and the clamping groove 13, the fixing frame 5 is provided with a sealing ring 10 tightly attached to the drill rod 1, sealing is further formed between the fixing frame 5 and the drill rod 1, and the sealing performance of the locking pad 9 is improved, make drilling rod 1 and locking pad 9 and more clean, thereby avoid locking pad 9 to skid because mud to increase the locking force, the material of a sealing section of thick bamboo 11 is the stainless steel, has increased the durability of a sealing section of thick bamboo 11 in the moist environment in the pit, the quantity of sleeve 2 is three, three sleeve 2 arranges into the centralizer wholly from top to bottom in proper order, the sleeve 2 of centralizer one end gets rid of mount 5, the sleeve 2 of the other end of centralizer gets rid of a sealing section of thick bamboo 11.

When in use, firstly, one sleeve 2 is sleeved on the drill rod 1, the position of the sleeve 2 can be adjusted according to requirements, the screw 3 can avoid a gap between the sleeve 2 and a well wall and avoid forming a piston, so that the drill rod 1 is smoother, the hard alloy 4 on the spiral 3 can increase the wear resistance of the spiral 3, then the locking bolt 7 is screwed, the locking bolt 7 moves inwards in the threaded through hole 6 to push the locking pad 9, and the locking pad 9 is pressed against the drill rod 1, so that the sleeve 2 is locked on the drill rod 1, then the rest sleeves 2 are arranged on the drill rod 1 in sequence and locked, and the adjacent sleeves 2 form sealing through a sealing component, thereby avoiding the entering of slurry, increasing the integrity of the centralizer, further prolonging the service life and improving the reliability, a plurality of sleeves 2 are assembled according to drilling and production requirements, the purpose of adjusting the length of the centralizer is achieved, and therefore drilling and production accuracy of the drill rod 1 can be controlled.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A centralizer for oil drilling applications, comprising:

a drill stem;

2. The centralizer for oil drilling and production according to claim 1, wherein the closure assembly comprises: the annular is seted up in the draw-in groove that the sleeve is close to mount one end, set up in one side that the mount was kept away from to the sleeve and can the cladding in the sealing section of thick bamboo of mount and set up in the tip of sealing section of thick bamboo and can the joint in the bulge loop of draw-in groove.

3. The centralizer for oil drilling and production according to claim 1, wherein one side of a bearing gasket is connected to the end of the locking bolt, the other side of the bearing gasket is connected with a locking pad, the fixing frame is provided with a through hole for the locking pad to move, and the bearing gasket is located in the fixing frame and is larger than the through hole in size.

4. The centralizer for oil drilling and production according to claim 3, wherein the locking bolt is a hexagon socket head cap screw, and the head of the locking bolt is located in the threaded through hole.

5. The centralizer of claim 1, wherein the mount is provided with a sealing ring in close proximity to the drill rod.

6. The centralizer of claim 2, wherein the closure cylinder is made of stainless steel.

7. The centralizer of claim 1, wherein the number of sleeves is three.