CN207863880U - A kind of nonpetroleum casing - Google Patents

Abstract

The utility model discloses a kind of nonpetroleum casings, including wearing layer, stainless steel layer, sleeve body, carbon fiber layer and the rust-proof coating set gradually from the inside to the outside；Wearing layer includes wearing layer ontology and multiple rolling units, and wearing layer inner body wall, which is radially recessed, is formed with multiple guide grooves；Rolling unit is arranged in a one-to-one correspondence with guide groove and each rolling unit includes spring, sliding block and steel ball；Spring, sliding block, steel ball are built in guide groove successively, and spring one end is connected with wearing layer inner body wall, the other end is connected with sliding block left end；Sliding block right side, which is recessed inwardly, is formed with a spherical hollow space, and steel ball rolling is set in cavity and steel ball protrudes from guide groove.The utility model becomes the rolling friction between drill string and ball by the way that rolling unit is arranged, by the sliding friction between drill string and casing, and energy protection sleeve pipe prevents casing and worn because of the movement of drill string.

Description

A kind of nonpetroleum casing

Technical field

The utility model is related to petroleum works tubing, more particularly, to a kind of nonpetroleum casing.

Background technology

In oil development and production process, there are the frictions of diversified forms between tubing string.During tubing string put-on and delegated Primary friction form be axial rub；In drilling process, primary friction form is that drilling rod and the circumferential of casing rub；In oil In gas production process, primary friction form is circumferential friction and the axial rub of oil pipe and casing.As time increases, it wears Aggravation, direct result is that casing wear is caused to fail.

Casing wear can reduce the collapsoing strength and internal pressure strength of casing string, cause casing string to squeeze and ruin, deform and leak, It causes full well to scrap when serious and brings heavy losses to oil field.Therefore, it is covered during the abrasion of drilling process casing, exploitation oil gas The abrasion of pipe and abrasionproof problem have caused extensive concern.Based on oil pipe wear failure problem, all kinds of casing wear preventions are had now been developed Damage device, is summed up that there are two main classes：One kind is using rubber package drilling rod and oil pipe, it is there are intensity difference, assembly and disassembly are difficult, Displacement is serious and is easily broken the shortcomings of falling off；Another kind of is the increase abrasionproof pipe nipple among drilling rod, and this method cannot be effective Axial abrasion between improvement tubing string, and increase and detain the time on Oil Field.

Utility model content

The purpose of the utility model is to overcome above-mentioned technical deficiencies, propose a kind of nonpetroleum casing, solve existing skill The technical issues of art petrochina casing fails because of abrasion.

To reach above-mentioned technical purpose, the technical solution of the utility model provides a kind of nonpetroleum casing, including by interior To wearing layer, stainless steel layer, sleeve body, carbon fiber layer and the rust-proof coating set gradually outside；The wearing layer includes wear-resisting Layer ontology and multiple rolling units, the wearing layer inner body wall, which is radially recessed, is formed with multiple guide grooves；The rolling unit It is arranged in a one-to-one correspondence with the guide groove and each rolling unit includes spring, sliding block and steel ball；The spring, sliding block, steel Ball is built in the guide groove successively, and the spring one end is connected with the wearing layer inner body wall, the other end and the sliding block Left end is connected；The sliding block right side, which is recessed inwardly, is formed with a spherical hollow space, and the steel ball rolling is set to the cavity The interior and described steel ball protrudes from the guide groove.

Compared with prior art, the beneficial effects of the utility model include：By the way that rolling unit is arranged, by drill string and casing Between sliding friction become the rolling friction between drill string and ball, can protection sleeve pipe, prevent casing because drill string movement And it wears；It can play the role of elastic buffer by the way that spring and stainless steel layer is arranged；Enhance casing by the way that carbon fiber layer is arranged Intensity；It can prevent casing from moving by casing clamp in the cement of solidification by being formed with multiple protrusions on carbon fiber layer peripheral surface It is dynamic.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the partial enlarged view of the rolling unit at A in Fig. 1；

Fig. 3 is the schematic three dimensional views of elastic sealing strip in the utility model.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

The utility model provides a kind of nonpetroleum casing, as shown in Figure 1, 2, 3, including set gradually from the inside to the outside Wearing layer 1, stainless steel layer 2, sleeve body 3, carbon fiber layer 4, rust-proof coating 5.

Wearing layer 1 includes wearing layer ontology 11 and multiple rolling units 12,11 inner wall of wearing layer ontology radially concave shape At having multiple guide grooves, rolling unit 12 to be uniformly arranged in the circumferential direction to form rolling assembly, the rolling assembly is in an axial direction every 12 lis Rice setting one, each rolling assembly include four rolling units 12, and rolling unit 12 is set with guide groove one-to-one correspondence Set and each rolling unit 12 include a spring 121, a sliding block 122, a steel ball 123, an elastic sealing strip 124, spring 121, Sliding block 122, elastic sealing strip 124 are built in the guide groove successively.

121 one end of spring is connected with 11 inner wall of wearing layer ontology, the other end is connected with 122 left end of sliding block, sliding block 122 right ends, which are recessed inwardly, is formed with a spherical hollow space, and the rolling of steel ball 123 is set in cavity and steel ball 123 protrudes from guide groove, bullet Property 124 outer ring of diaphragm seal is connected with 11 inner wall of wearing layer ontology, and 124 inner ring of elastic sealing strip is connected with 122 right side of sliding block It connects.

Multiple raised 41 are formed on 4 peripheral surface of carbon fiber layer, rust-proof coating 5 covers 4 peripheral surface of carbon fiber layer.

Operation principle：Drill string moves up and down or rotates in petroleum casing pipe, and when drill string shakes, drill string outer wall is connected to steel On ball 123, drill string generate impact force by steel ball 123, sliding block 122, pass to spring 121, pass through the compression of spring 121 Carry out vibration damping；Drill string outer wall, which is connected on steel ball 123, to be continued to move up and down or rotate, by the sliding friction between drill string and casing Become rolling friction, to reduce the abrasion of casing；By inclination section or when inclination section rotates, drill string is pressed on always drill string On the steel ball 123 of petroleum casing pipe lower end, the sliding friction between drill string and casing is become into rolling friction, to reduce the mill of casing Damage.

Stainless steel layer 2 can provide good elasticity；Carbon fiber layer 4 has resistance under corrosion-resistant, high-modulus, non-oxidizing atmosphere The many advantages of superhigh temperature, corrosion resistance protrude, and for rust-proof coating 5 for covering carbon fiber layer 4, eliminating carbon fiber layer 4 may Existing gap, and the other materials of internal layer are protected, it is used for antirust.

The beneficial effects of the utility model include：By the way that rolling unit is arranged, by the sliding friction between drill string and casing Become the rolling friction between drill string and ball, energy protection sleeve pipe prevents casing and worn because of the movement of drill string；Pass through setting Spring and stainless steel layer can play the role of elastic buffer；Enhance the intensity of casing by the way that carbon fiber layer is arranged；By in carbon fiber Being formed with multiple protrusions on dimension layer peripheral surface can prevent casing from moving by casing clamp in the cement of solidification.

Specific embodiment of the present utility model described above does not constitute the restriction to scope of protection of the utility model. The various other corresponding changes and deformation that any technical concept according to the present utility model is made, should be included in this practicality In novel scope of the claims.

Claims (5)

1. a kind of nonpetroleum casing, including the wearing layer, stainless steel layer, sleeve body, the carbon fiber that set gradually from the inside to the outside Layer and rust-proof coating；The wearing layer includes wearing layer ontology and multiple rolling units, and the wearing layer inner body wall is radially Recess is formed with multiple guide grooves；The rolling unit is arranged in a one-to-one correspondence with the guide groove and each rolling unit includes bullet Spring, sliding block and steel ball；The spring, sliding block, steel ball are built in the guide groove, the spring one end and the wearing layer sheet successively Wall is connected, the other end is connected with the sliding block left end in vivo；The sliding block right side, which is recessed inwardly, is formed with a spherical sky Chamber, the steel ball rolling setting is in the cavity and the steel ball protrudes from the guide groove.

2. nonpetroleum casing according to claim 1, which is characterized in that be formed on the carbon fiber layer peripheral surface more A protrusion, the rust-proof coating cover the carbon fiber layer peripheral surface.

3. nonpetroleum casing according to claim 1, which is characterized in that the rolling unit further includes an elastic packing Piece, the elastic sealing strip is built in the guide groove, and the elastic sealing strip outer ring is connected with the wearing layer inner body wall It connects, the elastic sealing strip inner ring is connected with the sliding block right side.

4. nonpetroleum casing according to claim 1, which is characterized in that the rolling unit is uniformly arranged in the circumferential direction shape At rolling assembly, the rolling assembly is arranged one every 12 centimetres in an axial direction.

5. nonpetroleum casing according to claim 4, which is characterized in that each rolling assembly includes four rollings Unit.